annotate dbutil.c @ 936:d93a6bcf616f

Improve handling lots of concurrent forwarded connections. Increase connection backlog, avoid check_close() for channels that haven't had IO
author Matt Johnston <matt@ucc.asn.au>
date Wed, 25 Jun 2014 23:42:39 +0800
parents 8f04e36622c0
children ef8d939de3dd
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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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69
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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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diff changeset
150
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diff changeset
151
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diff changeset
152 #ifdef DEBUG_TRACE
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diff changeset
153 void dropbear_trace(const char* format, ...) {
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diff changeset
154 va_list param;
753
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diff changeset
155 struct timeval tv;
4
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diff changeset
156
94
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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diff changeset
157 if (!debug_trace) {
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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diff changeset
158 return;
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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parents: 73
diff changeset
159 }
c85c88500ea6 DEBUG_TRACE now only triggers with -v on the cmdline
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diff changeset
160
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diff changeset
161 gettimeofday(&tv, NULL);
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162
4
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163 va_start(param, format);
753
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164 fprintf(stderr, "TRACE (%d) %d.%d: ", getpid(), tv.tv_sec, tv.tv_usec);
4
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165 vfprintf(stderr, format, param);
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166 fprintf(stderr, "\n");
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167 va_end(param);
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168 }
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169
731
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diff changeset
170 void dropbear_trace2(const char* format, ...) {
753
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diff changeset
171 static int trace_env = -1;
731
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diff changeset
172 va_list param;
753
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173 struct timeval tv;
731
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diff changeset
174
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diff changeset
175 if (trace_env == -1) {
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diff changeset
176 trace_env = getenv("DROPBEAR_TRACE2") ? 1 : 0;
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177 }
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178
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179 if (!(debug_trace && trace_env)) {
731
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180 return;
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diff changeset
181 }
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182
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183 gettimeofday(&tv, NULL);
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184
731
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diff changeset
185 va_start(param, format);
753
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186 fprintf(stderr, "TRACE2 (%d) %d.%d: ", getpid(), tv.tv_sec, tv.tv_usec);
731
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187 vfprintf(stderr, format, param);
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diff changeset
188 fprintf(stderr, "\n");
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diff changeset
189 va_end(param);
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diff changeset
190 }
4
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191 #endif /* DEBUG_TRACE */
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192
870
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
Catalin Patulea <cat@vv.carleton.ca>
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diff changeset
193 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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parents: 242
diff changeset
194 int val;
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diff changeset
195
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
196 /* disable nagle */
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diff changeset
197 val = 1;
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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diff changeset
198 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
870
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
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199 }
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200
871
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
Matt Johnston <matt@ucc.asn.au>
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diff changeset
201 void set_sock_priority(int sock, enum dropbear_prio prio) {
870
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diff changeset
202
871
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diff changeset
203 int iptos_val = 0, so_prio_val = 0, rc;
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
204
629
bdadc7f4b97d Set IPTOS_LOWDELAY for IPv6 too
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diff changeset
205 /* 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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parents: 242
diff changeset
206 #ifdef IPTOS_LOWDELAY
871
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diff changeset
207 if (prio == DROPBEAR_PRIO_LOWDELAY) {
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diff changeset
208 iptos_val = IPTOS_LOWDELAY;
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diff changeset
209 } else if (prio == DROPBEAR_PRIO_BULK) {
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diff changeset
210 iptos_val = IPTOS_THROUGHPUT;
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parents: 870
diff changeset
211 }
639
452bcf810e44 Put better #if guards around IPv6 socket options for IPV6_TCLASS and
Matt Johnston <matt@ucc.asn.au>
parents: 629
diff changeset
212 #if defined(IPPROTO_IPV6) && defined(IPV6_TCLASS)
871
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diff changeset
213 rc = setsockopt(sock, IPPROTO_IPV6, IPV6_TCLASS, (void*)&iptos_val, sizeof(iptos_val));
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diff changeset
214 if (rc < 0) {
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diff changeset
215 TRACE(("Couldn't set IPV6_TCLASS (%s)", strerror(errno)));
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diff changeset
216 }
629
bdadc7f4b97d Set IPTOS_LOWDELAY for IPv6 too
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diff changeset
217 #endif
871
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
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diff changeset
218 rc = setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&iptos_val, sizeof(iptos_val));
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diff changeset
219 if (rc < 0) {
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diff changeset
220 TRACE(("Couldn't set IP_TOS (%s)", strerror(errno)));
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parents: 870
diff changeset
221 }
251
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
222 #endif
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diff changeset
223
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
224 #ifdef SO_PRIORITY
871
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diff changeset
225 if (prio == DROPBEAR_PRIO_LOWDELAY) {
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diff changeset
226 so_prio_val = TC_PRIO_INTERACTIVE;
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parents: 870
diff changeset
227 } else if (prio == DROPBEAR_PRIO_BULK) {
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diff changeset
228 so_prio_val = TC_PRIO_BULK;
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diff changeset
229 }
aa689d140928 - Sockets are set to lowdelay priority initially to improve conneciton setup
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diff changeset
230 /* linux specific, sets QoS class. see tc-prio(8) */
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parents: 870
diff changeset
231 rc = setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &so_prio_val, sizeof(so_prio_val));
870
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diff changeset
232 if (rc < 0)
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diff changeset
233 dropbear_log(LOG_WARNING, "Couldn't set SO_PRIORITY (%s)",
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
Catalin Patulea <cat@vv.carleton.ca>
parents: 864
diff changeset
234 strerror(errno));
251
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
235 #endif
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
236
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
237 }
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
238
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
239 /* Listen on address:port.
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
240 * Special cases are address of "" listening on everything,
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
241 * and address of NULL listening on localhost only.
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
242 * Returns the number of sockets bound on success, or -1 on failure. On
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
243 * failure, if errstring wasn't NULL, it'll be a newly malloced error
20563735e8b5 just checkpointing
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parents: 51
diff changeset
244 * string.*/
20563735e8b5 just checkpointing
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parents: 51
diff changeset
245 int dropbear_listen(const char* address, const char* port,
20563735e8b5 just checkpointing
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parents: 51
diff changeset
246 int *socks, unsigned int sockcount, char **errstring, int *maxfd) {
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parents: 51
diff changeset
247
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
248 struct addrinfo hints, *res = NULL, *res0 = NULL;
62
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parents: 51
diff changeset
249 int err;
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parents: 51
diff changeset
250 unsigned int nsock;
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parents: 51
diff changeset
251 struct linger linger;
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parents: 51
diff changeset
252 int val;
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parents: 51
diff changeset
253 int sock;
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parents: 51
diff changeset
254
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
255 TRACE(("enter dropbear_listen"))
62
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parents: 51
diff changeset
256
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parents: 51
diff changeset
257 memset(&hints, 0, sizeof(hints));
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parents: 51
diff changeset
258 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
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parents: 51
diff changeset
259 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
260
433
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
261 /* for calling getaddrinfo:
c216212001fc Fix for -pedantic -ansi compilation, change // to /**/, plus some signedness
Matt Johnston <matt@ucc.asn.au>
parents: 425
diff changeset
262 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
263 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
264 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
265 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
266 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
267 } else {
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
268 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
269 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
270 address = NULL;
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
Matt Johnston <matt@ucc.asn.au>
parents: 251
diff changeset
271 }
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
272 hints.ai_flags = AI_PASSIVE;
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
Matt Johnston <matt@ucc.asn.au>
parents: 62
diff changeset
273 }
62
20563735e8b5 just checkpointing
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parents: 51
diff changeset
274 err = getaddrinfo(address, port, &hints, &res0);
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parents: 51
diff changeset
275
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parents: 51
diff changeset
276 if (err) {
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parents: 51
diff changeset
277 if (errstring != NULL && *errstring == NULL) {
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parents: 51
diff changeset
278 int len;
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Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
279 len = 20 + strlen(gai_strerror(err));
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parents: 51
diff changeset
280 *errstring = (char*)m_malloc(len);
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Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
281 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
282 }
239
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
283 if (res0) {
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
284 freeaddrinfo(res0);
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
285 res0 = NULL;
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
286 }
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
287 TRACE(("leave dropbear_listen: failed resolving"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
288 return -1;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
289 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
290
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
291
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
292 nsock = 0;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
293 for (res = res0; res != NULL && nsock < sockcount;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
294 res = res->ai_next) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
295
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
296 /* Get a socket */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
297 socks[nsock] = socket(res->ai_family, res->ai_socktype,
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
298 res->ai_protocol);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
299
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
300 sock = socks[nsock]; /* For clarity */
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 (sock < 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
303 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
304 TRACE(("socket() failed"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
305 continue;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
306 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
307
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
308 /* Various useful socket options */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
309 val = 1;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
310 /* set to reuse, quick timeout */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
311 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
312 linger.l_onoff = 1;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
313 linger.l_linger = 5;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
314 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
315
639
452bcf810e44 Put better #if guards around IPv6 socket options for IPV6_TCLASS and
Matt Johnston <matt@ucc.asn.au>
parents: 629
diff changeset
316 #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY)
627
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
317 if (res->ai_family == AF_INET6) {
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
318 int on = 1;
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
319 if (setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY,
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
320 &on, sizeof(on)) == -1) {
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
321 dropbear_log(LOG_WARNING, "Couldn't set IPV6_V6ONLY");
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
322 }
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
323 }
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
324 #endif
7cc34a52feb8 Try bind IPV6_V6ONLY
Matt Johnston <matt@ucc.asn.au>
parents: 615
diff changeset
325
870
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
Catalin Patulea <cat@vv.carleton.ca>
parents: 864
diff changeset
326 set_sock_nodelay(sock);
62
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 (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
329 err = errno;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
330 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
331 TRACE(("bind(%s) failed", port))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
332 continue;
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
936
d93a6bcf616f Improve handling lots of concurrent forwarded connections. Increase
Matt Johnston <matt@ucc.asn.au>
parents: 930
diff changeset
335 if (listen(sock, DROPBEAR_LISTEN_BACKLOG) < 0) {
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
336 err = errno;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
337 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
338 TRACE(("listen() failed"))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
339 continue;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
340 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
341
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
342 *maxfd = MAX(*maxfd, sock);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
343
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
344 nsock++;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
345 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
346
239
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
347 if (res0) {
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
348 freeaddrinfo(res0);
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
349 res0 = NULL;
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
350 }
e5ad9fa8b1fa add a missing freeaddrinfo()
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
351
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
352 if (nsock == 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
353 if (errstring != NULL && *errstring == NULL) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
354 int len;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
355 len = 20 + strlen(strerror(err));
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
356 *errstring = (char*)m_malloc(len);
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
357 snprintf(*errstring, len, "Error listening: %s", strerror(err));
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
358 }
408
28b10e93685c Fix failure-handling in dropbear_listen() when errstring is unset
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
359 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
360 return -1;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
361 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
362
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
363 TRACE(("leave dropbear_listen: success, %d socks bound", nsock))
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
364 return nsock;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
365 }
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
366
547
cf376c696dfc Make it compile, update for changes in channel structure.
Matt Johnston <matt@ucc.asn.au>
parents: 500
diff changeset
367 /* 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
368 #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
369 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
370 struct sockaddr_un addr;
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
371 int fd = -1;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
372
550
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
373 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
374 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
375 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
376 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
377 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
378 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
379 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
380 }
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
381 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
382 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
383 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
384 return -1;
61c3513825b0 Talking to the agent works now. Can't interpret the pubkeys.
Matt Johnston <matt@ucc.asn.au>
parents: 547
diff changeset
385 }
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
386 return fd;
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
387 }
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
388 #endif
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
389
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
390 /* 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
391 * return immediately if nonblocking is set. On failure, if errstring
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
392 * wasn't null, it will be a newly malloced error message */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
393
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
394 /* TODO: maxfd */
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
395 int connect_remote(const char* remotehost, const char* remoteport,
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
396 int nonblocking, char ** errstring) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
397
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
398 struct addrinfo *res0 = NULL, *res = NULL, hints;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
399 int sock;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
400 int err;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
401
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
402 TRACE(("enter connect_remote"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
403
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
404 if (errstring != NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
405 *errstring = NULL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
406 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
407
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
408 memset(&hints, 0, sizeof(hints));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
409 hints.ai_socktype = SOCK_STREAM;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
410 hints.ai_family = PF_UNSPEC;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
411
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
412 err = getaddrinfo(remotehost, remoteport, &hints, &res0);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
413 if (err) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
414 if (errstring != NULL && *errstring == NULL) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
415 int len;
490
bd2634b03b12 - Improve DNS failure message to include lookup host
Matt Johnston <matt@ucc.asn.au>
parents: 486
diff changeset
416 len = 100 + strlen(gai_strerror(err));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
417 *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
418 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
419 remotehost, remoteport, gai_strerror(err));
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
420 }
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
421 TRACE(("Error resolving: %s", gai_strerror(err)))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
422 return -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
423 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
424
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
425 sock = -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
426 err = EADDRNOTAVAIL;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
427 for (res = res0; res; res = res->ai_next) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
428
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
429 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
430 if (sock < 0) {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
431 err = errno;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
432 continue;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
433 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
434
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
435 if (nonblocking) {
225
ca7e76d981d9 - progress towards client agent forwarding
Matt Johnston <matt@ucc.asn.au>
parents: 198
diff changeset
436 setnonblocking(sock);
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
437 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
438
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
439 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) {
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
440 if (errno == EINPROGRESS && nonblocking) {
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
441 TRACE(("Connect in progress"))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
442 break;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
443 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
444 err = errno;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
445 close(sock);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
446 sock = -1;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
447 continue;
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
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
451 break; /* Success */
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
452 }
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
453
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
454 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) {
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
455 /* Failed */
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;
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
458 len = 20 + strlen(strerror(err));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
459 *errstring = (char*)m_malloc(len);
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
460 snprintf(*errstring, len, "Error connecting: %s", strerror(err));
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
461 }
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
462 TRACE(("Error connecting: %s", strerror(err)))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
463 } else {
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
464 /* Success */
870
80af450dae76 Set IPTOS_LOWDELAY on PTY sessions only
Catalin Patulea <cat@vv.carleton.ca>
parents: 864
diff changeset
465 set_sock_nodelay(sock);
26
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
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
468 freeaddrinfo(res0);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
469 if (sock > 0 && errstring != NULL && *errstring != NULL) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
470 m_free(*errstring);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
471 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
472
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
473 TRACE(("leave connect_remote: sock %d\n", sock))
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
474 return sock;
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
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
477 /* 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
478 * 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
479 * 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
480 * 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
481 * 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
482 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
483 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
484 int infds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
485 int outfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
486 int errfds[2];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
487 pid_t pid;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
488
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
489 const int FDIN = 0;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
490 const int FDOUT = 1;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
491
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
492 /* 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
493 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
494 return DROPBEAR_FAILURE;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
495 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
496 if (pipe(outfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
497 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
498 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
499 if (ret_errfd && pipe(errfds) != 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
500 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
501 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
502
667
fc7ae88e63b3 Rename HAVE_FORK to USE_VFORK
Matt Johnston <matt@ucc.asn.au>
parents: 666
diff changeset
503 #ifdef USE_VFORK
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
504 pid = vfork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
505 #else
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
506 pid = fork();
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
507 #endif
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
508
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
509 if (pid < 0) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
510 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
511 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
512
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
513 if (!pid) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
514 /* child */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
515
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
516 TRACE(("back to normal sigchld"))
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
517 /* Revert to normal sigchld handling */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
518 if (signal(SIGCHLD, SIG_DFL) == SIG_ERR) {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
519 dropbear_exit("signal() error");
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
520 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
521
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
522 /* redirect stdin/stdout */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
523
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
524 if ((dup2(infds[FDIN], STDIN_FILENO) < 0) ||
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
525 (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
526 (ret_errfd && dup2(errfds[FDOUT], STDERR_FILENO) < 0)) {
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
527 TRACE(("leave noptycommand: error redirecting FDs"))
594
a98a2138364a Improve capitalisation for all logged strings
Matt Johnston <matt@ucc.asn.au>
parents: 568
diff changeset
528 dropbear_exit("Child dup2() failure");
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
529 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
530
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
531 close(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
532 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
533 close(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
534 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
535 if (ret_errfd)
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
536 {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
537 close(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
538 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
539 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
540
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
541 exec_fn(exec_data);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
542 /* not reached */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
543 return DROPBEAR_FAILURE;
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
544 } else {
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
545 /* parent */
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
546 close(infds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
547 close(outfds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
548
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
549 setnonblocking(outfds[FDIN]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
550 setnonblocking(infds[FDOUT]);
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
551
484
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
552 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
553 close(errfds[FDOUT]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
554 setnonblocking(errfds[FDIN]);
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
555 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
556
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
557 if (ret_pid) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
558 *ret_pid = pid;
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
559 }
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
560
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
561 *ret_writefd = infds[FDOUT];
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
562 *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
563 if (ret_errfd) {
effb4a25b1ae Don't capture stderr from spawned processes in proxycommand mode
Matt Johnston <matt@ucc.asn.au>
parents: 482
diff changeset
564 *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
565 }
481
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
566 return DROPBEAR_SUCCESS;
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 }
357a2e2e9bcc - Generalise spawn_command function
Matt Johnston <matt@ucc.asn.au>
parents: 433
diff changeset
569
482
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
570 /* 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
571 * 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
572 */
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
573 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
574 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
575 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
576 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
577
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
578 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
579
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
580 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
581 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
582 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
583 /* 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
584 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
585 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
586 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
587 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
588
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
589 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
590 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
591 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
592 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
593 } else {
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
594 /* 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
595 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
596 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
597
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
598 /* 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
599 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
600 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
601 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
602
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
603 /* 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
604 * 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
605 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
606 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
607 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
608
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
609 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
610 }
7ad49f34a122 - Add run_shell_command() function to run a "sh -c" command, handling
Matt Johnston <matt@ucc.asn.au>
parents: 481
diff changeset
611
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
612 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
613 char **remote_host, char **remote_port, int host_lookup)
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
614 {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
615 struct sockaddr_storage addr;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
616 socklen_t addrlen;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
617
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
618 if (local_host || local_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
619 addrlen = sizeof(addr);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
620 if (getsockname(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
621 dropbear_exit("Failed socket address: %s", strerror(errno));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
622 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
623 getaddrstring(&addr, local_host, local_port, host_lookup);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
624 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
625 if (remote_host || remote_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
626 addrlen = sizeof(addr);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
627 if (getpeername(fd, (struct sockaddr*)&addr, &addrlen) < 0) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
628 dropbear_exit("Failed socket address: %s", strerror(errno));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
629 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
630 getaddrstring(&addr, remote_host, remote_port, host_lookup);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
631 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
632 }
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
633
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634 /* 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
635 * value is allocated with malloc() */
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
636 void getaddrstring(struct sockaddr_storage* addr,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
637 char **ret_host, char **ret_port,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
638 int host_lookup) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
639
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
640 char host[NI_MAXHOST+1], serv[NI_MAXSERV+1];
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
641 unsigned int len;
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
642 int ret;
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
643
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
644 int flags = NI_NUMERICSERV | NI_NUMERICHOST;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
645
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
646 #ifndef DO_HOST_LOOKUP
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
647 host_lookup = 0;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
648 #endif
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
649
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
650 if (host_lookup) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
651 flags = NI_NUMERICSERV;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
652 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
654 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
655 /* 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
656 * 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
657 * 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
658 * 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
659 #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
660 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
661 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
662 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
663 #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
664 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
665 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
666 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
667 #endif
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
668 #endif
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
669
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
670 ret = getnameinfo((struct sockaddr*)addr, len, host, sizeof(host)-1,
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
671 serv, sizeof(serv)-1, flags);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
672
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
673 if (ret != 0) {
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
674 if (host_lookup) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
675 /* 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
676 * 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
677 * to exhibit that behaviour. */
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
678 getaddrstring(addr, ret_host, ret_port, 0);
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
679 return;
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
680 } else {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
681 /* 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
682 dropbear_exit("Failed lookup: %s", gai_strerror(ret));
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
683 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
684 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
685
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
686 if (ret_host) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
687 *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
688 }
568
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
689 if (ret_port) {
005530560594 Rearrange getaddrstring() etc
Matt Johnston <matt@ucc.asn.au>
parents: 550
diff changeset
690 *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
691 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
692 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
693
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
694 #ifdef DEBUG_TRACE
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
695 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
696
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
697 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
698
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
699 fprintf(stderr, "%s\n", label);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
700 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
701 fprintf(stderr, "%02x", buf[i]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
702 if (i % 16 == 15) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
703 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
704 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
705 else if (i % 2 == 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
706 fprintf(stderr, " ");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
707 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
708 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
709 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
710 }
764
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
711
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
712 void printmpint(const char *label, mp_int *mp) {
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
713 buffer *buf = buf_new(1000);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
714 buf_putmpint(buf, mp);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
715 printhex(label, buf->data, buf->len);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
716 buf_free(buf);
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
717
2202e854d187 add printmpint() for debugging
Matt Johnston <matt@ucc.asn.au>
parents: 667
diff changeset
718 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
719 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
720
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
721 /* 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
722 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
723 * 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
724 * use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
725 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
726
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
727 char * ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
728 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
729 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
730
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
731 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
732 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
733
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
734 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
735 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
736 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
737 || 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
738 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
739 pos++;
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 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
742 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
743 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
744 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
745
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
746
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
747 /* 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
748 * 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
749 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
750 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
751
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
752 int fd = -1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
753 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
754 int maxlen;
358
e81d3bc1dc78 Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents: 357
diff changeset
755 int ret = DROPBEAR_FAILURE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
756
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
757 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
758
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
759 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
760 goto out;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
761 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
762
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
763 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
764 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
765 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
766 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
767 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
768 continue;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
769 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
770 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
771 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
772 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
773 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
774
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
775 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
776
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
777 out:
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
778 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
779 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
780 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
781 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
782 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
783
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
784 /* 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
785 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
786 * 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
787 /* 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
788 #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
789 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
790
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
791 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
792
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
793 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
794 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
795
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
796 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
797
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
798 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
799 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
800 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
801 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
802
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
803 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
804 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
805
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
806 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
807 /* 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
808 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
809 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
810
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
811 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
812
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
813
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
814 /* 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
815 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
816 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
817 } 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
818 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
819 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
820 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
821
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
822 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
823 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
824
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
825 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
826 void m_close(int fd) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
827
883
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
828 if (fd == -1) {
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
829 return;
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
830 }
ff597bf2cfb0 DROPBEAR_CLI_AUTH_IMMEDIATE fixed, now enabled by default
Matt Johnston <matt@ucc.asn.au>
parents: 871
diff changeset
831
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
832 int val;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
833 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
834 val = close(fd);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
835 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
836
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
837 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
838 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
839 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
840 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
841 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
842
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
843 void * m_malloc(size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
844
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
845 void* ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
846
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
847 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
848 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
849 }
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
850 ret = calloc(1, size);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
851 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
852 dropbear_exit("m_malloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
853 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
854 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
855
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
856 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
857
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
858 void * m_strdup(const char * str) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
859 char* ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
860
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
861 ret = strdup(str);
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
862 if (ret == NULL) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
863 dropbear_exit("m_strdup failed");
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
864 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
865 return ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
866 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
867
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
868 void * m_realloc(void* ptr, size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
869
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
870 void *ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
871
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
872 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
873 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
874 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
875 ret = realloc(ptr, size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
876 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
877 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
878 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
879 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
880 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
881
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
882 /* 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
883 * "Secure Programming for Linux and Unix HOWTO" */
161
b9d3f725e00b 0.44 release changes
Matt Johnston <matt@ucc.asn.au>
parents: 160
diff changeset
884 /* 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
885 * optimised away */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
886 void m_burn(void *data, unsigned int len) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
887 volatile char *p = data;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
888
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
889 if (data == NULL)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
890 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
891 while (len--) {
655
76e780c74a5e - Burn buffers to 0x00 instead
Matt Johnston <matt@ucc.asn.au>
parents: 639
diff changeset
892 *p++ = 0x0;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
893 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
894 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
895
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
896
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
897 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
898
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
899 TRACE(("setnonblocking: %d", fd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
900
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
901 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
902 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
903 /* 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
904 * 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
905 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
906 } else {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
907 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
908 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
909 }
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
910 TRACE(("leave setnonblocking"))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
911 }
425
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
912
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
913 void disallow_core() {
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
914 struct rlimit lim;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
915 lim.rlim_cur = lim.rlim_max = 0;
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
916 setrlimit(RLIMIT_CORE, &lim);
1afa503e33f5 Disable core dumps
Matt Johnston <matt@ucc.asn.au>
parents: 410
diff changeset
917 }
492
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
918
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
919 /* 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
920 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
921 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
922 errno = 0;
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
923 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
924 /* 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
925 * I've looked at mention it in their manpage */
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
926 if ((l == 0 && errno == EINVAL)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
927 || (l == ULONG_MAX && errno == ERANGE)
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
928 || (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
929 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
930 } else {
864
30ab30e46452 Fix some warnings
Matt Johnston <matt@ucc.asn.au>
parents: 835
diff changeset
931 *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
932 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
933 }
b956d6151600 Replace calls to strtoul() with a helper m_str_to_uint()
Matt Johnston <matt@ucc.asn.au>
parents: 490
diff changeset
934 }
817
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
935
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
936 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
937 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
938 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
939 uint8_t c = 0;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
940 size_t i;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
941 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
942 {
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
943 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
944 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
945 return c;
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
946 }
a625f9e135a4 Constant time memcmp for the hmac and password crypt
Matt Johnston <matt@ucc.asn.au>
parents: 753
diff changeset
947
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
948 time_t monotonic_now() {
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
949
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
950 #if defined(__linux__) && defined(SYS_clock_gettime)
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
951 /* CLOCK_MONOTONIC_COARSE was added in Linux 2.6.32. Probably cheaper. */
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
952 #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
953 #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
954 #endif
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
955 static clockid_t clock_source = 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
956 struct timespec ts;
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
957
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
958 if (syscall(SYS_clock_gettime, clock_source, &ts) == EINVAL) {
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
959 clock_source = CLOCK_MONOTONIC;
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
960 syscall(SYS_clock_gettime, CLOCK_MONOTONIC, &ts);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
961 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
962 return ts.tv_sec;
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
963 #elif defined(HAVE_MACH_ABSOLUTE_TIME)
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
964 /* OS X, see https://developer.apple.com/library/mac/qa/qa1398/_index.html */
930
8f04e36622c0 Fix monotonic_now() on OS X
Matt Johnston <matt@ucc.asn.au>
parents: 928
diff changeset
965 static mach_timebase_info_data_t timebase_info;
928
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
966 if (timebase_info.denom == 0) {
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
967 mach_timebase_info(&timebase_info);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
968 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
969 return mach_absolute_time() * timebase_info.numer / timebase_info.denom
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
970 / 1e9;
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
971 #else
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
972 /* Fallback for everything else - this will sometimes go backwards */
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
973 return time(NULL);
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
974 #endif
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
975
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
976 }
7cd89d4e0335 Add new monotonic_now() wrapper so that timeouts are unaffected by
Matt Johnston <matt@ucc.asn.au>
parents: 883
diff changeset
977