annotate dbutil.c @ 1022:4121ca987e6a

connect_remote() is now always non-blocking
author Matt Johnston <matt@ucc.asn.au>
date Sat, 14 Feb 2015 09:56:11 +0800
parents 24135c8e1d46
children a00303a7d247 d3925ed45a85
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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) 2002,2003 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 * strlcat() is copyright as follows:
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26 * Copyright (c) 1998 Todd C. Miller <[email protected]>
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27 * All rights reserved.
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28 *
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29 * Redistribution and use in source and binary forms, with or without
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30 * modification, are permitted provided that the following conditions
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31 * are met:
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32 * 1. Redistributions of source code must retain the above copyright
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33 * notice, this list of conditions and the following disclaimer.
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34 * 2. Redistributions in binary form must reproduce the above copyright
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35 * notice, this list of conditions and the following disclaimer in the
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36 * documentation and/or other materials provided with the distribution.
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37 * 3. The name of the author may not be used to endorse or promote products
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38 * derived from this software without specific prior written permission.
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39 *
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40 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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42 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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43 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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44 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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45 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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46 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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47 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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48 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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49 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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50
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51 #include "config.h"
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52
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53 #ifdef __linux__
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54 #define _GNU_SOURCE
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55 /* To call clock_gettime() directly */
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56 #include <sys/syscall.h>
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57 #endif /* __linux */
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58
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59 #ifdef HAVE_MACH_MACH_TIME_H
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60 #include <mach/mach_time.h>
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61 #include <mach/mach.h>
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62 #endif
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63
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64 #include "includes.h"
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65 #include "dbutil.h"
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66 #include "buffer.h"
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67 #include "session.h"
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68 #include "atomicio.h"
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70 #define MAX_FMT 100
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71
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72 static void generic_dropbear_exit(int exitcode, const char* format,
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73 va_list param) ATTRIB_NORETURN;
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74 static void generic_dropbear_log(int priority, const char* format,
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75 va_list param);
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76
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77 void (*_dropbear_exit)(int exitcode, const char* format, va_list param) ATTRIB_NORETURN
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78 = generic_dropbear_exit;
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79 void (*_dropbear_log)(int priority, const char* format, va_list param)
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80 = generic_dropbear_log;
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82 #ifdef DEBUG_TRACE
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83 int debug_trace = 0;
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84 #endif
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85
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86 #ifndef DISABLE_SYSLOG
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87 void startsyslog() {
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88
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89 openlog(PROGNAME, LOG_PID, LOG_AUTHPRIV);
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90
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91 }
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92 #endif /* DISABLE_SYSLOG */
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93
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94 /* the "format" string must be <= 100 characters */
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95 void dropbear_close(const char* format, ...) {
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96
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97 va_list param;
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98
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99 va_start(param, format);
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100 _dropbear_exit(EXIT_SUCCESS, format, param);
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101 va_end(param);
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102
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103 }
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104
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105 void dropbear_exit(const char* format, ...) {
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106
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107 va_list param;
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108
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109 va_start(param, format);
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110 _dropbear_exit(EXIT_FAILURE, format, param);
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111 va_end(param);
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112 }
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113
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114 static void generic_dropbear_exit(int exitcode, const char* format,
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115 va_list param) {
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116
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117 char fmtbuf[300];
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118
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119 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
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120
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121 _dropbear_log(LOG_INFO, fmtbuf, param);
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122
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123 exit(exitcode);
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124 }
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125
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126 void fail_assert(const char* expr, const char* file, int line) {
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127 dropbear_exit("Failed assertion (%s:%d): `%s'", file, line, expr);
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128 }
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129
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130 static void generic_dropbear_log(int UNUSED(priority), const char* format,
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131 va_list param) {
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132
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133 char printbuf[1024];
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134
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135 vsnprintf(printbuf, sizeof(printbuf), format, param);
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136
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137 fprintf(stderr, "%s\n", printbuf);
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138
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139 }
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140
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141 /* this is what can be called to write arbitrary log messages */
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142 void dropbear_log(int priority, const char* format, ...) {
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143
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144 va_list param;
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145
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146 va_start(param, format);
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147 _dropbear_log(priority, format, param);
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148 va_end(param);
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149 }
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150
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151
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152 #ifdef DEBUG_TRACE
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153
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154 static double debug_start_time = -1;
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155
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156 void debug_start_net()
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157 {
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158 if (getenv("DROPBEAR_DEBUG_NET_TIMESTAMP"))
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159 {
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160 /* Timestamps start from first network activity */
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161 struct timeval tv;
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162 gettimeofday(&tv, NULL);
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163 debug_start_time = tv.tv_sec + (tv.tv_usec / 1000000.0);
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164 TRACE(("Resetting Dropbear TRACE timestamps"))
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165 }
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166 }
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167
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168 static double time_since_start()
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169 {
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170 double nowf;
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171 struct timeval tv;
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172 gettimeofday(&tv, NULL);
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173 nowf = tv.tv_sec + (tv.tv_usec / 1000000.0);
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174 if (debug_start_time < 0)
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175 {
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176 debug_start_time = nowf;
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177 return 0;
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178 }
1021
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179 return nowf - debug_start_time;
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180 }
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181
4
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182 void dropbear_trace(const char* format, ...) {
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183 va_list param;
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184
94
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185 if (!debug_trace) {
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186 return;
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187 }
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188
4
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189 va_start(param, format);
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190 fprintf(stderr, "TRACE (%d) %f: ", getpid(), time_since_start());
4
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191 vfprintf(stderr, format, param);
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192 fprintf(stderr, "\n");
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193 va_end(param);
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194 }
753
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195
731
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196 void dropbear_trace2(const char* format, ...) {
753
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197 static int trace_env = -1;
731
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198 va_list param;
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199
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200 if (trace_env == -1) {
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201 trace_env = getenv("DROPBEAR_TRACE2") ? 1 : 0;
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202 }
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203
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204 if (!(debug_trace && trace_env)) {
731
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205 return;
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206 }
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207
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diff changeset
208 va_start(param, format);
1016
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209 fprintf(stderr, "TRACE2 (%d) %f: ", getpid(), time_since_start());
731
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210 vfprintf(stderr, format, param);
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diff changeset
211 fprintf(stderr, "\n");
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diff changeset
212 va_end(param);
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213 }
4
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214 #endif /* DEBUG_TRACE */
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215
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diff changeset
216 void set_sock_nodelay(int sock) {
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
217 int val;
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218
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219 /* disable nagle */
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diff changeset
220 val = 1;
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diff changeset
221 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
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222 }
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223
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224 void set_sock_priority(int sock, enum dropbear_prio prio) {
870
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225
871
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226 int iptos_val = 0, so_prio_val = 0, rc;
251
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diff changeset
227
962
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diff changeset
228 /* Don't log ENOTSOCK errors so that this can harmlessly be called
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229 * on a client '-J' proxy pipe */
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230
629
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diff changeset
231 /* set the TOS bit for either ipv4 or ipv6 */
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
232 #ifdef IPTOS_LOWDELAY
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diff changeset
233 if (prio == DROPBEAR_PRIO_LOWDELAY) {
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diff changeset
234 iptos_val = IPTOS_LOWDELAY;
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diff changeset
235 } else if (prio == DROPBEAR_PRIO_BULK) {
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diff changeset
236 iptos_val = IPTOS_THROUGHPUT;
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diff changeset
237 }
639
452bcf810e44 Put better #if guards around IPv6 socket options for IPV6_TCLASS and
Matt Johnston <matt@ucc.asn.au>
parents: 629
diff changeset
238 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
871
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diff changeset
239 rc = setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS, (void*)&iptos_val, sizeof(iptos_val));
962
db9fa5971d24 Don't warn about ENOTSOCK when setting priority
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diff changeset
240 if (rc < 0 && errno != ENOTSOCK) {
871
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diff changeset
241 TRACE(("Couldn't set IPV6_TCLASS (%s)", strerror(errno)));
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diff changeset
242 }
629
bdadc7f4b97d Set IPTOS_LOWDELAY for IPv6 too
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diff changeset
243 #endif
871
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diff changeset
244 rc = setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&iptos_val, sizeof(iptos_val));
962
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parents: 953
diff changeset
245 if (rc < 0 && errno != ENOTSOCK) {
871
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diff changeset
246 TRACE(("Couldn't set IP_TOS (%s)", strerror(errno)));
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diff changeset
247 }
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
248 #endif
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diff changeset
249
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
250 #ifdef SO_PRIORITY
871
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diff changeset
251 if (prio == DROPBEAR_PRIO_LOWDELAY) {
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diff changeset
252 so_prio_val = TC_PRIO_INTERACTIVE;
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parents: 870
diff changeset
253 } else if (prio == DROPBEAR_PRIO_BULK) {
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diff changeset
254 so_prio_val = TC_PRIO_BULK;
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diff changeset
255 }
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
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diff changeset
256 /* linux specific, sets QoS class. see tc-prio(8) */
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diff changeset
257 rc = setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &so_prio_val, sizeof(so_prio_val));
962
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diff changeset
258 if (rc < 0 && errno != ENOTSOCK)
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diff changeset
259 dropbear_log(LOG_WARNING, "Couldn't set SO_PRIORITY (%s)",
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diff changeset
260 strerror(errno));
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
261 #endif
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diff changeset
262
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
263 }
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
Matt Johnston <matt@ucc.asn.au>
parents: 242
diff changeset
264
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
265 /* Listen on address:port.
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parents: 251
diff changeset
266 * Special cases are address of "" listening on everything,
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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parents: 251
diff changeset
267 * and address of NULL listening on localhost only.
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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parents: 62
diff changeset
268 * Returns the number of sockets bound on success, or -1 on failure. On
62
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parents: 51
diff changeset
269 * failure, if errstring wasn't NULL, it'll be a newly malloced error
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diff changeset
270 * string.*/
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diff changeset
271 int dropbear_listen(const char* address, const char* port,
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parents: 51
diff changeset
272 int *socks, unsigned int sockcount, char **errstring, int *maxfd) {
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diff changeset
273
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
274 struct addrinfo hints, *res = NULL, *res0 = NULL;
62
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parents: 51
diff changeset
275 int err;
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parents: 51
diff changeset
276 unsigned int nsock;
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diff changeset
277 struct linger linger;
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parents: 51
diff changeset
278 int val;
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diff changeset
279 int sock;
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diff changeset
280
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
281 TRACE(("enter dropbear_listen"))
62
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parents: 51
diff changeset
282
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parents: 51
diff changeset
283 memset(&hints, 0, sizeof(hints));
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parents: 51
diff changeset
284 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
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parents: 51
diff changeset
285 hints.ai_socktype = SOCK_STREAM;
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
286
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
287 /* for calling getaddrinfo:
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
288 address == NULL and !AI_PASSIVE: local loopback
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
289 address == NULL and AI_PASSIVE: all interfaces
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
290 address != NULL: whatever the address says */
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
291 if (!address) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
292 TRACE(("dropbear_listen: local loopback"))
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
293 } else {
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
294 if (address[0] == '\0') {
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
295 TRACE(("dropbear_listen: all interfaces"))
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
296 address = NULL;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
297 }
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
298 hints.ai_flags = AI_PASSIVE;
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
299 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
300 err = getaddrinfo(address, port, &hints, &res0);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
301
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
302 if (err) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
303 if (errstring != NULL && *errstring == NULL) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
304 int len;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
305 len = 20 + strlen(gai_strerror(err));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
306 *errstring = (char*)m_malloc(len);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
307 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
308 }
239
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
309 if (res0) {
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
310 freeaddrinfo(res0);
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
311 res0 = NULL;
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
312 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
313 TRACE(("leave dropbear_listen: failed resolving"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
314 return -1;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
315 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
316
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
317
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
318 nsock = 0;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
319 for (res = res0; res != NULL && nsock < sockcount;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
320 res = res->ai_next) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
321
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
322 /* Get a socket */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
323 socks[nsock] = socket(res->ai_family, res->ai_socktype,
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
324 res->ai_protocol);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
325
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
326 sock = socks[nsock]; /* For clarity */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
327
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
328 if (sock < 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
329 err = errno;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
330 TRACE(("socket() failed"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
331 continue;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
332 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
333
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
334 /* Various useful socket options */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
335 val = 1;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
336 /* set to reuse, quick timeout */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
337 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
338 linger.l_onoff = 1;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
339 linger.l_linger = 5;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
340 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
341
639
452bcf810e44 Put better #if guards around IPv6 socket options for IPV6_TCLASS and
Matt Johnston <matt@ucc.asn.au>
parents: 629
diff changeset
342 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
627
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
343 if (res->ai_family == AF_INET6) {
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
344 int on = 1;
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
345 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
346 &on, sizeof(on)) == -1) {
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
347 dropbear_log(LOG_WARNING, "Couldn't set IPV6_V6ONLY");
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
348 }
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
349 }
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
350 #endif
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
351
870
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
Catalin Patulea <cat@vv.carleton.ca>
parents: 864
diff changeset
352 set_sock_nodelay(sock);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
353
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
354 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
355 err = errno;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
356 close(sock);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
357 TRACE(("bind(%s) failed", port))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
358 continue;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
359 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
360
936
d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase
Matt Johnston <matt@ucc.asn.au>
parents: 930
diff changeset
361 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
362 err = errno;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
363 close(sock);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
364 TRACE(("listen() failed"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
365 continue;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
366 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
367
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
368 *maxfd = MAX(*maxfd, sock);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
369
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
370 nsock++;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
371 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
372
239
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
373 if (res0) {
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
374 freeaddrinfo(res0);
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
375 res0 = NULL;
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
376 }
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
377
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
378 if (nsock == 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
379 if (errstring != NULL && *errstring == NULL) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
380 int len;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
381 len = 20 + strlen(strerror(err));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
382 *errstring = (char*)m_malloc(len);
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
383 snprintf(*errstring, len, "Error listening: %s", strerror(err));
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
384 }
408
28b10e93685c Fix failure-handling in dropbear_listen() when errstring is unset
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
385 TRACE(("leave dropbear_listen: failure, %s", strerror(err)))
28b10e93685c Fix failure-handling in dropbear_listen() when errstring is unset
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
386 return -1;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
387 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
388
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
389 TRACE(("leave dropbear_listen: success, %d socks bound", nsock))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
390 return nsock;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
391 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
392
547
cf376c696dfc Make it compile, update for changes in channel structure.
Matt Johnston <matt@ucc.asn.au>
parents: 500
diff changeset
393 /* Connect to a given unix socket. The socket is blocking */
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
394 #ifdef ENABLE_CONNECT_UNIX
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
395 int connect_unix(const char* path) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
396 struct sockaddr_un addr;
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
397 int fd = -1;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
398
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
399 memset((void*)&addr, 0x0, sizeof(addr));
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
400 addr.sun_family = AF_UNIX;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
401 strlcpy(addr.sun_path, path, sizeof(addr.sun_path));
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
402 fd = socket(PF_UNIX, SOCK_STREAM, 0);
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
403 if (fd < 0) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
404 TRACE(("Failed to open unix socket"))
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
405 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
406 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
407 if (connect(fd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
408 TRACE(("Failed to connect to '%s' socket", path))
615
e3ac0a426bd0 Fix FD leak if connect() fails, found by Klocwork
Matt Johnston <matt@ucc.asn.au>
parents: 614
diff changeset
409 m_close(fd);
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
410 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
411 }
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
412 return fd;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
413 }
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
414 #endif
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
415
1016
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
416 #if defined(__linux__) && defined(TCP_DEFER_ACCEPT)
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
417 static void set_piggyback_ack(int sock) {
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
418 /* Undocumented Linux feature - set TCP_DEFER_ACCEPT and data will be piggybacked
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
419 on the 3rd packet (ack) of the TCP handshake. Saves a IP packet.
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
420 http://thread.gmane.org/gmane.linux.network/224627/focus=224727
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
421 "Piggyback the final ACK of the three way TCP connection establishment with the data" */
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
422 int val = 1;
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
423 /* No error checking, this is opportunistic */
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
424 int err = setsockopt(sock, IPPROTO_TCP, TCP_DEFER_ACCEPT, (void*)&val, sizeof(val));
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
425 if (err)
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
426 {
1018
cb148f8d3d22 Make it compile
Matt Johnston <matt@ucc.asn.au>
parents: 1016
diff changeset
427 TRACE(("Failed setsockopt TCP_DEFER_ACCEPT: %s", strerror(errno)))
1016
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
428 }
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
429 }
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
430 #endif
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
431
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
432
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
433 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
434 * return immediately if nonblocking is set. On failure, if errstring
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
435 * wasn't null, it will be a newly malloced error message */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
436
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
437 /* TODO: maxfd */
1022
4121ca987e6a connect_remote() is now always non-blocking
Matt Johnston <matt@ucc.asn.au>
parents: 1021
diff changeset
438 int connect_remote(const char* remotehost, const char* remoteport, char ** errstring) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
439
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
440 struct addrinfo *res0 = NULL, *res = NULL, hints;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
441 int sock;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
442 int err;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
443
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
444 TRACE(("enter connect_remote"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
445
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
446 if (errstring != NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
447 *errstring = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
448 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
449
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
450 memset(&hints, 0, sizeof(hints));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
451 hints.ai_socktype = SOCK_STREAM;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
452 hints.ai_family = PF_UNSPEC;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
453
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
454 err = getaddrinfo(remotehost, remoteport, &hints, &res0);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
455 if (err) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
456 if (errstring != NULL && *errstring == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
457 int len;
490
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
458 len = 100 + strlen(gai_strerror(err));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
459 *errstring = (char*)m_malloc(len);
490
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
460 snprintf(*errstring, len, "Error resolving '%s' port '%s'. %s",
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
461 remotehost, remoteport, gai_strerror(err));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
462 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
463 TRACE(("Error resolving: %s", gai_strerror(err)))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
464 return -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
465 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
466
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
467 sock = -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
468 err = EADDRNOTAVAIL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
469 for (res = res0; res; res = res->ai_next) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
470
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
471 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
472 if (sock < 0) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
473 err = errno;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
474 continue;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
475 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
476
1022
4121ca987e6a connect_remote() is now always non-blocking
Matt Johnston <matt@ucc.asn.au>
parents: 1021
diff changeset
477 setnonblocking(sock);
1016
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
478
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
479 #if defined(__linux__) && defined(TCP_DEFER_ACCEPT)
1022
4121ca987e6a connect_remote() is now always non-blocking
Matt Johnston <matt@ucc.asn.au>
parents: 1021
diff changeset
480 set_piggyback_ack(sock);
1016
257f7d5fca97 piggyback data on acks when making connections on linux
Matt Johnston <matt@ucc.asn.au>
parents: 995
diff changeset
481 #endif
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
482
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
483 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) {
1022
4121ca987e6a connect_remote() is now always non-blocking
Matt Johnston <matt@ucc.asn.au>
parents: 1021
diff changeset
484 if (errno == EINPROGRESS) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
485 TRACE(("Connect in progress"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
486 break;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
487 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
488 err = errno;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
489 close(sock);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
490 sock = -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
491 continue;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
492 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
493 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
494
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
495 break; /* Success */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
496 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
497
1022
4121ca987e6a connect_remote() is now always non-blocking
Matt Johnston <matt@ucc.asn.au>
parents: 1021
diff changeset
498 if (sock < 0 && !(errno == EINPROGRESS)) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
499 /* Failed */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
500 if (errstring != NULL && *errstring == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
501 int len;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
502 len = 20 + strlen(strerror(err));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
503 *errstring = (char*)m_malloc(len);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
504 snprintf(*errstring, len, "Error connecting: %s", strerror(err));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
505 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
506 TRACE(("Error connecting: %s", strerror(err)))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
507 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
508 /* Success */
870
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
Catalin Patulea <cat@vv.carleton.ca>
parents: 864
diff changeset
509 set_sock_nodelay(sock);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
510 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
511
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
512 freeaddrinfo(res0);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
513 if (sock > 0 && errstring != NULL && *errstring != NULL) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
514 m_free(*errstring);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
515 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
516
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
517 TRACE(("leave connect_remote: sock %d\n", sock))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
518 return sock;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
519 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
520
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
521 /* Sets up a pipe for a, returning three non-blocking file descriptors
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
522 * and the pid. exec_fn is the function that will actually execute the child process,
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
523 * it will be run after the child has fork()ed, and is passed exec_data.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
524 * If ret_errfd == NULL then stderr will not be captured.
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
525 * ret_pid can be passed as NULL to discard the pid. */
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
526 int spawn_command(void(*exec_fn)(void *user_data), void *exec_data,
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
527 int *ret_writefd, int *ret_readfd, int *ret_errfd, pid_t *ret_pid) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
528 int infds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
529 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
530 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
531 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
532
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
533 const int FDIN = 0;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
534 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
535
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
536 /* redirect stdin/stdout/stderr */
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
537 if (pipe(infds) != 0) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
538 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
539 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
540 if (pipe(outfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
541 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
542 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
543 if (ret_errfd && pipe(errfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
544 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
545 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
546
667
fc7ae88e63b3 Rename HAVE_FORK to USE_VFORK
Matt Johnston <matt@ucc.asn.au>
parents: 666
diff changeset
547 #ifdef USE_VFORK
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
548 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
549 #else
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
550 pid = fork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
551 #endif
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
552
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
553 if (pid < 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
554 return DROPBEAR_FAILURE;
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
555 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
556
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
557 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
558 /* child */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
559
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
560 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
561 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
562 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
563 dropbear_exit("signal() error");
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
564 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
565
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
566 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
567
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
568 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) ||
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
569 (dup2(outfds[FDOUT], STDOUT_FILENO) < 0) ||
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
570 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
571 TRACE(("leave noptycommand: error redirecting FDs"))
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
572 dropbear_exit("Child dup2() failure");
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
573 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
574
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
575 close(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
576 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
577 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
578 close(outfds[FDOUT]);
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
579 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
580 {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
581 close(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
582 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
583 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
584
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
585 exec_fn(exec_data);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
586 /* not reached */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
587 return DROPBEAR_FAILURE;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
588 } else {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
589 /* parent */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
590 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
591 close(outfds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
592
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
593 setnonblocking(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
594 setnonblocking(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
595
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
596 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
597 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
598 setnonblocking(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
599 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
600
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
601 if (ret_pid) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
602 *ret_pid = pid;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
603 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
604
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
605 *ret_writefd = infds[FDOUT];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
606 *ret_readfd = outfds[FDIN];
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
607 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
608 *ret_errfd = errfds[FDIN];
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
609 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
610 return DROPBEAR_SUCCESS;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
611 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
612 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
613
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
614 /* Runs a command with "sh -c". Will close FDs (except stdin/stdout/stderr) and
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
615 * re-enabled SIGPIPE. If cmd is NULL, will run a login shell.
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
616 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
617 void run_shell_command(const char* cmd, unsigned int maxfd, char* usershell) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
618 char * argv[4];
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
619 char * baseshell = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
620 unsigned int i;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
621
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
622 baseshell = basename(usershell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
623
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
624 if (cmd != NULL) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
625 argv[0] = baseshell;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
626 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
627 /* a login shell should be "-bash" for "/bin/bash" etc */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
628 int len = strlen(baseshell) + 2; /* 2 for "-" */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
629 argv[0] = (char*)m_malloc(len);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
630 snprintf(argv[0], len, "-%s", baseshell);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
631 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
632
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
633 if (cmd != NULL) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
634 argv[1] = "-c";
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
635 argv[2] = (char*)cmd;
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
636 argv[3] = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
637 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
638 /* construct a shell of the form "-bash" etc */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
639 argv[1] = NULL;
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
640 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
641
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
642 /* Re-enable SIGPIPE for the executed process */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
643 if (signal(SIGPIPE, SIG_DFL) == SIG_ERR) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
644 dropbear_exit("signal() error");
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
645 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
646
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
647 /* close file descriptors except stdin/stdout/stderr
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
648 * Need to be sure FDs are closed here to avoid reading files as root */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
649 for (i = 3; i <= maxfd; i++) {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
650 m_close(i);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
651 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
652
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
653 execv(usershell, argv);
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
654 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
655
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
656 void get_socket_address(int fd, char **local_host, char **local_port,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
657 char **remote_host, char **remote_port, int host_lookup)
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
658 {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
659 struct sockaddr_storage addr;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
660 socklen_t addrlen;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
661
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
662 if (local_host || local_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
663 addrlen = sizeof(addr);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
664 if (getsockname(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
665 dropbear_exit("Failed socket address: %s", strerror(errno));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
666 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
667 getaddrstring(&addr, local_host, local_port, host_lookup);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
668 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
669 if (remote_host || remote_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
670 addrlen = sizeof(addr);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
671 if (getpeername(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
672 dropbear_exit("Failed socket address: %s", strerror(errno));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
673 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
674 getaddrstring(&addr, remote_host, remote_port, host_lookup);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
675 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
676 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
677
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 /* Return a string representation of the socket address passed. The return
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
679 * value is allocated with malloc() */
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
680 void getaddrstring(struct sockaddr_storage* addr,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
681 char **ret_host, char **ret_port,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
682 int host_lookup) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
683
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
684 char host[NI_MAXHOST+1], serv[NI_MAXSERV+1];
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
685 unsigned int len;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
686 int ret;
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
687
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
688 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
689
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
690 #ifndef DO_HOST_LOOKUP
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
691 host_lookup = 0;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
692 #endif
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
693
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
694 if (host_lookup) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
695 flags = NI_NUMERICSERV;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
696 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
697
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
698 len = sizeof(struct sockaddr_storage);
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
699 /* Some platforms such as Solaris 8 require that len is the length
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
700 * of the specific structure. Some older linux systems (glibc 2.1.3
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
701 * such as debian potato) have sockaddr_storage.__ss_family instead
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
702 * but we'll ignore them */
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
703 #ifdef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
704 if (addr->ss_family == AF_INET) {
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
705 len = sizeof(struct sockaddr_in);
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
706 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
707 #ifdef AF_INET6
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
708 if (addr->ss_family == AF_INET6) {
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
709 len = sizeof(struct sockaddr_in6);
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
710 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
711 #endif
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
712 #endif
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
713
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
714 ret = getnameinfo((struct sockaddr*)addr, len, host, sizeof(host)-1,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
715 serv, sizeof(serv)-1, flags);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
716
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
717 if (ret != 0) {
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
718 if (host_lookup) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
719 /* On some systems (Darwin does it) we get EINTR from getnameinfo
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
720 * somehow. Eew. So we'll just return the IP, since that doesn't seem
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
721 * to exhibit that behaviour. */
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
722 getaddrstring(addr, ret_host, ret_port, 0);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
723 return;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
724 } else {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
725 /* if we can't do a numeric lookup, something's gone terribly wrong */
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
726 dropbear_exit("Failed lookup: %s", gai_strerror(ret));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
727 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
728 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
729
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
730 if (ret_host) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
731 *ret_host = m_strdup(host);
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
732 }
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
733 if (ret_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
734 *ret_port = m_strdup(serv);
160
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
735 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
736 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
737
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
738 #ifdef DEBUG_TRACE
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
739 void printhex(const char * label, const unsigned char * buf, int len) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
740
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
741 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
742
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
743 fprintf(stderr, "%s\n", label);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
744 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
745 fprintf(stderr, "%02x", buf[i]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
746 if (i % 16 == 15) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
747 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
748 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
749 else if (i % 2 == 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
750 fprintf(stderr, " ");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
751 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
752 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
753 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754 }
764
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
755
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
756 void printmpint(const char *label, mp_int *mp) {
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
757 buffer *buf = buf_new(1000);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
758 buf_putmpint(buf, mp);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
759 printhex(label, buf->data, buf->len);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
760 buf_free(buf);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
761
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
762 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
764
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
765 /* Strip all control characters from text (a null-terminated string), except
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
766 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
767 * The result returned is a newly allocated string, this must be free()d after
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
768 * use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
769 char * stripcontrol(const char * text) {
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 char * ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
772 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
773 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
775 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
776 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
777
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
778 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
779 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
780 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
781 || text[i] == '\n' || text[i] == '\r' || text[i] == '\t') {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
783 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
784 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
785 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
786 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
787 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
788 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
789
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
790
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
791 /* reads the contents of filename into the buffer buf, from the current
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
792 * position, either to the end of the file, or the buffer being full.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
793 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
794 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
795
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
796 int fd = -1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
797 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
798 int maxlen;
358
e81d3bc1dc78 Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents: 357
diff changeset
799 int ret = DROPBEAR_FAILURE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
800
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
801 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
802
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
803 if (fd < 0) {
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
804 goto out;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
805 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
806
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
807 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
808 maxlen = buf->size - buf->pos;
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
809 len = read(fd, buf_getwriteptr(buf, maxlen), maxlen);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
810 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
811 if (errno == EINTR || errno == EAGAIN) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
812 continue;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
813 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
814 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
815 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
816 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
817 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
818
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
819 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
820
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
821 out:
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
822 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
823 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
824 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
825 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
826 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
828 /* get a line from the file into buffer in the style expected for an
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
829 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
830 * Will return DROPBEAR_SUCCESS if data is read, or DROPBEAR_FAILURE on EOF.*/
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
831 /* Only used for ~/.ssh/known_hosts and ~/.ssh/authorized_keys */
68
eee77ac31ccc cleaning up the pubkey defines
Matt Johnston <matt@ucc.asn.au>
parents: 64
diff changeset
832 #if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH)
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
833 int buf_getline(buffer * line, FILE * authfile) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
834
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
835 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
836
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
837 buf_setpos(line, 0);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
838 buf_setlen(line, 0);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
839
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
840 while (line->pos < line->size) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
841
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
842 c = fgetc(authfile); /*getc() is weird with some uClibc systems*/
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
843 if (c == EOF || c == '\n' || c == '\r') {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
844 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
845 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
846
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
847 buf_putbyte(line, (unsigned char)c);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
848 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
849
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
850 TRACE(("leave getauthline: line too long"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
851 /* We return success, but the line length will be zeroed - ie we just
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
852 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
853 buf_setlen(line, 0);
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
854
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
855 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
856
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
857
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
858 /* if we didn't read anything before EOF or error, exit */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
859 if (c == EOF && line->pos == 0) {
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
860 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
861 } else {
117
e0acad552a92 Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
862 buf_setpos(line, 0);
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
863 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
864 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
865
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
866 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
867 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
868
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
869 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
870 void m_close(int fd) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
872 if (fd == -1) {
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
873 return;
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
874 }
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
875
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 int val;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
878 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
881 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
882 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
883 dropbear_exit("Error closing fd %d, %s", fd, strerror(errno));
4
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 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
886
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 void * m_malloc(size_t size) {
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 void* ret;
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 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
892 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893 }
123
a0db9a23f6d4 calloc memory rather than mallocing it - can't hurt too much, and is
Matt Johnston <matt@ucc.asn.au>
parents: 117
diff changeset
894 ret = calloc(1, size);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
895 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
896 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
897 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
898 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
899
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
900 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
901
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
902 void * m_strdup(const char * str) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
903 char* ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
904
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
905 ret = strdup(str);
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
906 if (ret == NULL) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
907 dropbear_exit("m_strdup failed");
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
908 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
909 return ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
910 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
911
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
912 void * m_realloc(void* ptr, size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
913
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
914 void *ret;
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 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
917 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
918 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
919 ret = realloc(ptr, size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
920 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
921 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
922 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
923 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
924 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
925
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
926 /* Clear the data, based on the method in David Wheeler's
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
927 * "Secure Programming for Linux and Unix HOWTO" */
161
b9d3f725e00b 0.44 release changes
Matt Johnston <matt@ucc.asn.au>
parents: 160
diff changeset
928 /* Beware of calling this from within dbutil.c - things might get
b9d3f725e00b 0.44 release changes
Matt Johnston <matt@ucc.asn.au>
parents: 160
diff changeset
929 * optimised away */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
930 void m_burn(void *data, unsigned int len) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
931 volatile char *p = data;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
932
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
933 if (data == NULL)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
934 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
935 while (len--) {
655
76e780c74a5e - Burn buffers to 0x00 instead
Matt Johnston <matt@ucc.asn.au>
parents: 639
diff changeset
936 *p++ = 0x0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
937 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
938 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
939
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
940
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
941 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
942
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
943 TRACE(("setnonblocking: %d", fd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
944
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
945 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) {
173
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
946 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
947 /* Some devices (like /dev/null redirected in)
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
948 * can't be set to non-blocking */
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
949 TRACE(("ignoring ENODEV for setnonblocking"))
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
950 } else {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
951 dropbear_exit("Couldn't set nonblocking");
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
952 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
953 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
954 TRACE(("leave setnonblocking"))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
955 }
425
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
956
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
957 void disallow_core() {
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
958 struct rlimit lim;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
959 lim.rlim_cur = lim.rlim_max = 0;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
960 setrlimit(RLIMIT_CORE, &lim);
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
961 }
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
962
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
963 /* Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE, with the result in *val */
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
964 int m_str_to_uint(const char* str, unsigned int *val) {
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
965 unsigned long l;
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
966 errno = 0;
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
967 l = strtoul(str, NULL, 10);
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
968 /* The c99 spec doesn't actually seem to define EINVAL, but most platforms
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
969 * I've looked at mention it in their manpage */
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
970 if ((l == 0 && errno == EINVAL)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
971 || (l == ULONG_MAX && errno == ERANGE)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
972 || (l > UINT_MAX)) {
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
973 return DROPBEAR_FAILURE;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
974 } else {
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
975 *val = l;
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
976 return DROPBEAR_SUCCESS;
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
977 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
978 }
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
979
995
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
980 /* Returns malloced path. Only expands ~ in first character */
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
981 char * expand_tilde(const char *inpath) {
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
982 struct passwd *pw = NULL;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
983 if (inpath[0] == '~') {
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
984 pw = getpwuid(getuid());
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
985 if (pw && pw->pw_dir) {
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
986 int len = strlen(inpath) + strlen(pw->pw_dir) + 1;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
987 char *buf = m_malloc(len);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
988 snprintf(buf, len, "%s/%s", pw->pw_dir, &inpath[1]);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
989 return buf;
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
990 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
991 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
992
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
993 /* Fallback */
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
994 return m_strdup(inpath);
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
995 }
6fb4c010c448 Default client key path ~/.ssh/id_dropbear
Matt Johnston <matt@ucc.asn.au>
parents: 962
diff changeset
996
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
997 int constant_time_memcmp(const void* a, const void *b, size_t n)
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
998 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
999 const char *xa = a, *xb = b;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1000 uint8_t c = 0;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1001 size_t i;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1002 for (i = 0; i < n; i++)
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1003 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1004 c |= (xa[i] ^ xb[i]);
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1005 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1006 return c;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1007 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
1008
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
1009 #if defined(__linux__) && defined(SYS_clock_gettime)
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1010 /* CLOCK_MONOTONIC_COARSE was added in Linux 2.6.32 but took a while to
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1011 reach userspace include headers */
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
1012 #ifndef CLOCK_MONOTONIC_COARSE
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
1013 #define CLOCK_MONOTONIC_COARSE 6
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
1014 #endif
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1015 static clockid_t get_linux_clock_source() {
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
1016 struct timespec ts;
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1017 if (syscall(SYS_clock_gettime, CLOCK_MONOTONIC_COARSE, &ts) == 0) {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1018 return CLOCK_MONOTONIC_COARSE;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1019 }
953
356a25a108a3 Fix some format string warnings
Matt Johnston <matt@ucc.asn.au>
parents: 952
diff changeset
1020
952
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1021 if (syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &ts) == 0) {
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1022 return CLOCK_MONOTONIC;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1023 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1024 return -1;
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1025 }
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1026 #endif
ef8d939de3dd Fix clock_gettime handling
Matt Johnston <matt@ucc.asn.au>
parents: 936
diff changeset
1027
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1028 time_t monotonic_now() {
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diff changeset
1029 #if defined(__linux__) && defined(SYS_clock_gettime)
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diff changeset
1030 static clockid_t clock_source = -2;
928
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1031
952
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diff changeset
1032 if (clock_source == -2) {
953
356a25a108a3 Fix some format string warnings
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diff changeset
1033 /* First run, find out which one works.
952
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1034 -1 will fall back to time() */
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1035 clock_source = get_linux_clock_source();
928
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1036 }
952
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1037
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1038 if (clock_source >= 0) {
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1039 struct timespec ts;
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1040 if (syscall(SYS_clock_gettime, clock_source, &ts) != 0) {
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diff changeset
1041 /* Intermittent clock failures should not happen */
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1042 dropbear_exit("Clock broke");
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1043 }
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1044 return ts.tv_sec;
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1045 }
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1046 #endif /* linux clock_gettime */
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1047
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diff changeset
1048 #if defined(HAVE_MACH_ABSOLUTE_TIME)
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1049 /* OS X, see https://developer.apple.com/library/mac/qa/qa1398/_index.html */
930
8f04e36622c0 Fix monotonic_now() on OS X
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parents: 928
diff changeset
1050 static mach_timebase_info_data_t timebase_info;
928
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1051 if (timebase_info.denom == 0) {
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1052 mach_timebase_info(&timebase_info);
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1053 }
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1054 return mach_absolute_time() * timebase_info.numer / timebase_info.denom
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diff changeset
1055 / 1e9;
952
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diff changeset
1056 #endif /* osx mach_absolute_time */
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diff changeset
1057
928
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diff changeset
1058 /* Fallback for everything else - this will sometimes go backwards */
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diff changeset
1059 return time(NULL);
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1060 }
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diff changeset
1061