annotate dbutil.c @ 374:87ae4565679d channel-fix

merge of 'a94c5265558121fe936519b5d9a5eb27f95e9d9d' and 'd348546b80847bc0d42a7b5208bb31a54f1fdfaf'
author Matt Johnston <matt@ucc.asn.au>
date Tue, 05 Dec 2006 13:28:44 +0000
parents e81d3bc1dc78
children b895f91c2ee6
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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 "includes.h"
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52 #include "dbutil.h"
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53 #include "buffer.h"
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54 #include "session.h"
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55 #include "atomicio.h"
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56
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57 #define MAX_FMT 100
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58
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59 static void generic_dropbear_exit(int exitcode, const char* format,
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60 va_list param);
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61 static void generic_dropbear_log(int priority, const char* format,
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62 va_list param);
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63
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64 void (*_dropbear_exit)(int exitcode, const char* format, va_list param)
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65 = generic_dropbear_exit;
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66 void (*_dropbear_log)(int priority, const char* format, va_list param)
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67 = generic_dropbear_log;
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94
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69 #ifdef DEBUG_TRACE
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70 int debug_trace = 0;
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71 #endif
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72
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73 #ifndef DISABLE_SYSLOG
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74 void startsyslog() {
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75
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76 openlog(PROGNAME, LOG_PID, LOG_AUTHPRIV);
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77
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78 }
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79 #endif /* DISABLE_SYSLOG */
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80
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81 /* the "format" string must be <= 100 characters */
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82 void dropbear_close(const char* format, ...) {
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83
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84 va_list param;
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85
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86 va_start(param, format);
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87 _dropbear_exit(EXIT_SUCCESS, format, param);
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88 va_end(param);
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89
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90 }
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91
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92 void dropbear_exit(const char* format, ...) {
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93
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94 va_list param;
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95
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96 va_start(param, format);
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97 _dropbear_exit(EXIT_FAILURE, format, param);
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98 va_end(param);
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99 }
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100
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101 static void generic_dropbear_exit(int exitcode, const char* format,
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102 va_list param) {
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103
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104 char fmtbuf[300];
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105
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106 snprintf(fmtbuf, sizeof(fmtbuf), "Exited: %s", format);
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107
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108 _dropbear_log(LOG_INFO, fmtbuf, param);
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109
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110 exit(exitcode);
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111 }
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112
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113 void fail_assert(const char* expr, const char* file, int line) {
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114 dropbear_exit("failed assertion (%s:%d): `%s'", file, line, expr);
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115 }
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116
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117 static void generic_dropbear_log(int UNUSED(priority), const char* format,
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118 va_list param) {
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119
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120 char printbuf[1024];
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121
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122 vsnprintf(printbuf, sizeof(printbuf), format, param);
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123
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124 fprintf(stderr, "%s\n", printbuf);
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125
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126 }
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127
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128 /* this is what can be called to write arbitrary log messages */
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129 void dropbear_log(int priority, const char* format, ...) {
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130
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131 va_list param;
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132
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133 va_start(param, format);
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134 _dropbear_log(priority, format, param);
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135 va_end(param);
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136 }
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137
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138
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139 #ifdef DEBUG_TRACE
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140 void dropbear_trace(const char* format, ...) {
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141
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142 va_list param;
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143
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144 if (!debug_trace) {
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145 return;
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146 }
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147
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148 va_start(param, format);
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149 fprintf(stderr, "TRACE: ");
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150 vfprintf(stderr, format, param);
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151 fprintf(stderr, "\n");
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152 va_end(param);
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153 }
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154 #endif /* DEBUG_TRACE */
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155
251
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diff changeset
156 static void set_sock_priority(int sock) {
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157
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diff changeset
158 int val;
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159
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diff changeset
160 /* disable nagle */
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diff changeset
161 val = 1;
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diff changeset
162 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val));
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163
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diff changeset
164 /* set the TOS bit. note that this will fail for ipv6, I can't find any
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165 * equivalent. */
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diff changeset
166 #ifdef IPTOS_LOWDELAY
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diff changeset
167 val = IPTOS_LOWDELAY;
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diff changeset
168 setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&val, sizeof(val));
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diff changeset
169 #endif
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170
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diff changeset
171 #ifdef SO_PRIORITY
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172 /* linux specific, sets QoS class.
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173 * 6 looks to be optimal for interactive traffic (see tc-prio(8) ). */
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diff changeset
174 val = 6;
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diff changeset
175 setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &val, sizeof(val));
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diff changeset
176 #endif
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177
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178 }
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179
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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180 /* Listen on address:port.
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181 * Special cases are address of "" listening on everything,
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182 * and address of NULL listening on localhost only.
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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183 * Returns the number of sockets bound on success, or -1 on failure. On
62
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184 * failure, if errstring wasn't NULL, it'll be a newly malloced error
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185 * string.*/
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186 int dropbear_listen(const char* address, const char* port,
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187 int *socks, unsigned int sockcount, char **errstring, int *maxfd) {
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188
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
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diff changeset
189 struct addrinfo hints, *res = NULL, *res0 = NULL;
62
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190 int err;
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191 unsigned int nsock;
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192 struct linger linger;
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193 int val;
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194 int sock;
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195
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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196 TRACE(("enter dropbear_listen"))
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197
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198 memset(&hints, 0, sizeof(hints));
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diff changeset
199 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */
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diff changeset
200 hints.ai_socktype = SOCK_STREAM;
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
201
258
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diff changeset
202 // for calling getaddrinfo:
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diff changeset
203 // address == NULL and !AI_PASSIVE: local loopback
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204 // address == NULL and AI_PASSIVE: all interfaces
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diff changeset
205 // address != NULL: whatever the address says
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diff changeset
206 if (!address) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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diff changeset
207 TRACE(("dropbear_listen: local loopback"))
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
208 } else {
258
306499676384 * add -g (dbclient) and -a (dropbear) options for allowing non-local
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diff changeset
209 if (address[0] == '\0') {
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diff changeset
210 TRACE(("dropbear_listen: all interfaces"))
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diff changeset
211 address = NULL;
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diff changeset
212 }
63
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
213 hints.ai_flags = AI_PASSIVE;
dcc43965928f - A nice cleaner structure for tcp (acceptor) forwarding.
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diff changeset
214 }
62
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diff changeset
215 err = getaddrinfo(address, port, &hints, &res0);
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216
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217 if (err) {
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218 if (errstring != NULL && *errstring == NULL) {
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219 int len;
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diff changeset
220 len = 20 + strlen(gai_strerror(err));
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221 *errstring = (char*)m_malloc(len);
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diff changeset
222 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
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diff changeset
223 }
239
e5ad9fa8b1fa add a missing freeaddrinfo()
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diff changeset
224 if (res0) {
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diff changeset
225 freeaddrinfo(res0);
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diff changeset
226 res0 = NULL;
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diff changeset
227 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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diff changeset
228 TRACE(("leave dropbear_listen: failed resolving"))
62
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diff changeset
229 return -1;
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diff changeset
230 }
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231
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232
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diff changeset
233 nsock = 0;
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diff changeset
234 for (res = res0; res != NULL && nsock < sockcount;
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diff changeset
235 res = res->ai_next) {
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diff changeset
236
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diff changeset
237 /* Get a socket */
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diff changeset
238 socks[nsock] = socket(res->ai_family, res->ai_socktype,
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diff changeset
239 res->ai_protocol);
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diff changeset
240
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diff changeset
241 sock = socks[nsock]; /* For clarity */
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diff changeset
242
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diff changeset
243 if (sock < 0) {
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diff changeset
244 err = errno;
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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diff changeset
245 TRACE(("socket() failed"))
62
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diff changeset
246 continue;
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diff changeset
247 }
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248
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diff changeset
249 /* Various useful socket options */
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diff changeset
250 val = 1;
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diff changeset
251 /* set to reuse, quick timeout */
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diff changeset
252 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val));
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diff changeset
253 linger.l_onoff = 1;
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diff changeset
254 linger.l_linger = 5;
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diff changeset
255 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger));
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diff changeset
256
251
b02e8eef3c3a - new function to set "low delay" for a packet, set the ip TOS bit
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parents: 242
diff changeset
257 set_sock_priority(sock);
62
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diff changeset
258
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diff changeset
259 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
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diff changeset
260 err = errno;
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diff changeset
261 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
262 TRACE(("bind(%s) failed", port))
62
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diff changeset
263 continue;
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diff changeset
264 }
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diff changeset
265
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diff changeset
266 if (listen(sock, 20) < 0) {
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diff changeset
267 err = errno;
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diff changeset
268 close(sock);
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 161
diff changeset
269 TRACE(("listen() failed"))
62
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diff changeset
270 continue;
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diff changeset
271 }
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diff changeset
272
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diff changeset
273 *maxfd = MAX(*maxfd, sock);
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diff changeset
274
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diff changeset
275 nsock++;
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diff changeset
276 }
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diff changeset
277
239
e5ad9fa8b1fa add a missing freeaddrinfo()
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parents: 198
diff changeset
278 if (res0) {
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parents: 198
diff changeset
279 freeaddrinfo(res0);
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parents: 198
diff changeset
280 res0 = NULL;
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parents: 198
diff changeset
281 }
e5ad9fa8b1fa add a missing freeaddrinfo()
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parents: 198
diff changeset
282
62
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diff changeset
283 if (nsock == 0) {
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parents: 51
diff changeset
284 if (errstring != NULL && *errstring == NULL) {
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diff changeset
285 int len;
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diff changeset
286 len = 20 + strlen(strerror(err));
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diff changeset
287 *errstring = (char*)m_malloc(len);
64
efb5e0b335cf TCP forwarding works.
Matt Johnston <matt@ucc.asn.au>
parents: 63
diff changeset
288 snprintf(*errstring, len, "Error listening: %s", strerror(err));
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
289 TRACE(("leave dropbear_listen: failure, %s", strerror(err)))
62
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diff changeset
290 return -1;
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diff changeset
291 }
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diff changeset
292 }
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diff changeset
293
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 161
diff changeset
294 TRACE(("leave dropbear_listen: success, %d socks bound", nsock))
62
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parents: 51
diff changeset
295 return nsock;
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diff changeset
296 }
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diff changeset
297
26
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
298 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will
62
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diff changeset
299 * return immediately if nonblocking is set. On failure, if errstring
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parents: 51
diff changeset
300 * wasn't null, it will be a newly malloced error message */
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parents: 51
diff changeset
301
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diff changeset
302 /* TODO: maxfd */
26
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diff changeset
303 int connect_remote(const char* remotehost, const char* remoteport,
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diff changeset
304 int nonblocking, char ** errstring) {
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diff changeset
305
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diff changeset
306 struct addrinfo *res0 = NULL, *res = NULL, hints;
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diff changeset
307 int sock;
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diff changeset
308 int err;
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diff changeset
309
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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parents: 161
diff changeset
310 TRACE(("enter connect_remote"))
26
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diff changeset
311
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diff changeset
312 if (errstring != NULL) {
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diff changeset
313 *errstring = NULL;
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diff changeset
314 }
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diff changeset
315
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diff changeset
316 memset(&hints, 0, sizeof(hints));
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diff changeset
317 hints.ai_socktype = SOCK_STREAM;
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diff changeset
318 hints.ai_family = PF_UNSPEC;
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diff changeset
319
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diff changeset
320 err = getaddrinfo(remotehost, remoteport, &hints, &res0);
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diff changeset
321 if (err) {
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diff changeset
322 if (errstring != NULL && *errstring == NULL) {
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diff changeset
323 int len;
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diff changeset
324 len = 20 + strlen(gai_strerror(err));
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diff changeset
325 *errstring = (char*)m_malloc(len);
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diff changeset
326 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err));
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diff changeset
327 }
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
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diff changeset
328 TRACE(("Error resolving: %s", gai_strerror(err)))
26
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diff changeset
329 return -1;
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diff changeset
330 }
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diff changeset
331
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diff changeset
332 sock = -1;
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diff changeset
333 err = EADDRNOTAVAIL;
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diff changeset
334 for (res = res0; res; res = res->ai_next) {
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diff changeset
335
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diff changeset
336 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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diff changeset
337 if (sock < 0) {
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diff changeset
338 err = errno;
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diff changeset
339 continue;
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diff changeset
340 }
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diff changeset
341
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diff changeset
342 if (nonblocking) {
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diff changeset
343 if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) {
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diff changeset
344 close(sock);
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diff changeset
345 sock = -1;
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diff changeset
346 if (errstring != NULL && *errstring == NULL) {
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diff changeset
347 *errstring = m_strdup("Failed non-blocking");
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diff changeset
348 }
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
349 TRACE(("Failed non-blocking: %s", strerror(errno)))
26
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diff changeset
350 continue;
0969767bca0d snapshot of stuff
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diff changeset
351 }
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diff changeset
352 }
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diff changeset
353
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diff changeset
354 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
355 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
356 TRACE(("Connect in progress"))
26
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diff changeset
357 break;
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parents: 11
diff changeset
358 } else {
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parents: 11
diff changeset
359 err = errno;
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parents: 11
diff changeset
360 close(sock);
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parents: 11
diff changeset
361 sock = -1;
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diff changeset
362 continue;
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parents: 11
diff changeset
363 }
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parents: 11
diff changeset
364 }
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parents: 11
diff changeset
365
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
366 break; /* Success */
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parents: 11
diff changeset
367 }
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diff changeset
368
70
b0316ce64e4b Merging in the changes from 0.41-0.43 main Dropbear tree
Matt Johnston <matt@ucc.asn.au>
parents: 68
diff changeset
369 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) {
26
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diff changeset
370 /* Failed */
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parents: 11
diff changeset
371 if (errstring != NULL && *errstring == NULL) {
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parents: 11
diff changeset
372 int len;
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parents: 11
diff changeset
373 len = 20 + strlen(strerror(err));
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parents: 11
diff changeset
374 *errstring = (char*)m_malloc(len);
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parents: 11
diff changeset
375 snprintf(*errstring, len, "Error connecting: %s", strerror(err));
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parents: 11
diff changeset
376 }
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
377 TRACE(("Error connecting: %s", strerror(err)))
26
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parents: 11
diff changeset
378 } else {
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diff changeset
379 /* Success */
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
380 set_sock_priority(sock);
26
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diff changeset
381 }
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diff changeset
382
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
383 freeaddrinfo(res0);
62
20563735e8b5 just checkpointing
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parents: 51
diff changeset
384 if (sock > 0 && errstring != NULL && *errstring != NULL) {
20563735e8b5 just checkpointing
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parents: 51
diff changeset
385 m_free(*errstring);
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parents: 51
diff changeset
386 }
26
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
387
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
388 TRACE(("leave connect_remote: sock %d\n", sock))
26
0969767bca0d snapshot of stuff
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parents: 11
diff changeset
389 return sock;
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parents: 11
diff changeset
390 }
0969767bca0d snapshot of stuff
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diff changeset
391
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
392 /* 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
393 * value is allocated with malloc() */
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
394 unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
395
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
396 char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV];
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
397 char *retstring = NULL;
20563735e8b5 just checkpointing
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parents: 51
diff changeset
398 int ret;
20563735e8b5 just checkpointing
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parents: 51
diff changeset
399 unsigned int len;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
400
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
401 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
402 /* 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
403 * 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
404 * 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
405 * 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
406 #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
407 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
408 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
409 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
410 #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
411 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
412 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
413 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
414 #endif
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
415 #endif
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
416
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
417 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf),
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
418 sbuf, sizeof(sbuf), NI_NUMERICSERV | NI_NUMERICHOST);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
419
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
420 if (ret != 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
421 /* This is a fairly bad failure - it'll fallback to IP if it
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
422 * just can't resolve */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
423 dropbear_exit("failed lookup (%d, %d)", ret, errno);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
424 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
425
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
426 if (withport) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
427 len = strlen(hbuf) + 2 + strlen(sbuf);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
428 retstring = (char*)m_malloc(len);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
429 snprintf(retstring, len, "%s:%s", hbuf, sbuf);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
430 } else {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
431 retstring = m_strdup(hbuf);
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
432 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
433
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
434 return retstring;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
435
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
436 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
437
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
438 /* Get the hostname corresponding to the address addr. On failure, the IP
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
439 * address is returned. The return value is allocated with strdup() */
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
440 char* getaddrhostname(struct sockaddr_storage * addr) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
441
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
442 char hbuf[NI_MAXHOST];
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
443 char sbuf[NI_MAXSERV];
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
444 int ret;
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
445 unsigned int len;
172
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
446 #ifdef DO_HOST_LOOKUP
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
447 const int flags = NI_NUMERICSERV;
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
448 #else
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
449 const int flags = NI_NUMERICHOST | NI_NUMERICSERV;
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
450 #endif
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
451
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
452 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
453 /* Some platforms such as Solaris 8 require that len is the length
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
454 * of the specific structure. */
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
455 #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
456 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
457 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
458 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
459 #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
460 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
461 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
462 }
7ceceb46d655 Fix so that getnameinfo() is passed the address-specific structure size. This
Matt Johnston <matt@ucc.asn.au>
parents: 150
diff changeset
463 #endif
335
e17f0333c21e Another stab at getting ss_family happy on older glibc
Matt Johnston <matt@ucc.asn.au>
parents: 277
diff changeset
464 #endif
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
465
172
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
466
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
467 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf),
172
3e49d8d18005 * respect DO_HOST_LOOKUP config option
Matt Johnston <matt@ucc.asn.au>
parents: 165
diff changeset
468 sbuf, sizeof(sbuf), flags);
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
469
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
470 if (ret != 0) {
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
471 /* On some systems (Darwin does it) we get EINTR from getnameinfo
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
472 * somehow. Eew. So we'll just return the IP, since that doesn't seem
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
473 * to exhibit that behaviour. */
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
474 return getaddrstring(addr, 0);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
475 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
476
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
477 return m_strdup(hbuf);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
478 }
62
20563735e8b5 just checkpointing
Matt Johnston <matt@ucc.asn.au>
parents: 51
diff changeset
479
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
480 #ifdef DEBUG_TRACE
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
481 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
482
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
483 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
484
198
65585699d980 * add a "label" argument to printhex()
Matt Johnston <matt@ucc.asn.au>
parents: 173
diff changeset
485 fprintf(stderr, "%s\n", label);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
486 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
487 fprintf(stderr, "%02x", buf[i]);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
488 if (i % 16 == 15) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
489 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
490 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
491 else if (i % 2 == 1) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
492 fprintf(stderr, " ");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
493 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
494 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
495 fprintf(stderr, "\n");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
496 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
497 #endif
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
498
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
499 /* 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
500 * for '\n', '\r' and '\t'.
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
501 * 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
502 * use */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
503 char * stripcontrol(const char * text) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
504
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
505 char * ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
506 int len, pos;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
507 int i;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
508
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
509 len = strlen(text);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
510 ret = m_malloc(len+1);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
511
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
512 pos = 0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
513 for (i = 0; i < len; i++) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
514 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
515 || 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
516 ret[pos] = text[i];
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
517 pos++;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
518 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
519 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
520 ret[pos] = 0x0;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
521 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
522 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
523
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
524
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
525 /* 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
526 * 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
527 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
528 int buf_readfile(buffer* buf, const char* filename) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
529
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
530 int fd = -1;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
531 int len;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
532 int maxlen;
358
e81d3bc1dc78 Forgot variable declaration.
Matt Johnston <matt@ucc.asn.au>
parents: 357
diff changeset
533 int ret = DROPBEAR_FAILURE;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
534
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
535 fd = open(filename, O_RDONLY);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
536
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
537 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
538 goto out;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
539 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
540
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
541 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
542 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
543 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
544 if (len < 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
545 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
546 continue;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
547 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
548 goto out;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
549 }
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
550 buf_incrwritepos(buf, len);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
551 } while (len < maxlen && len > 0);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
552
357
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
553 ret = DROPBEAR_SUCCESS;
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
554
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
555 out:
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
556 if (fd >= 0) {
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
557 m_close(fd);
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
558 }
9e2ad1023978 Handle failure reading a file (such as a key file)
Matt Johnston <matt@ucc.asn.au>
parents: 335
diff changeset
559 return ret;
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
560 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
561
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
562 /* 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
563 * authkeys file.
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
564 * 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
565 /* 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
566 #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
567 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
568
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
569 int c = EOF;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
570
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
571 TRACE(("enter buf_getline"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
572
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
573 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
574 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
575
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
576 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
577
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
578 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
579 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
580 goto out;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
581 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
582
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
583 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
584 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
585
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
586 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
587 /* 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
588 * ignore that line */
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
589 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
590
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
591 out:
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
592
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
593
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
594 /* 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
595 if (c == EOF && line->pos == 0) {
165
0cfba3034be5 Fixed DEBUG_TRACE macro so that we don't get semicolons left about the place
Matt Johnston <matt@ucc.asn.au>
parents: 161
diff changeset
596 TRACE(("leave buf_getline: failure"))
51
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
597 return DROPBEAR_FAILURE;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
598 } else {
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
599 TRACE(("leave buf_getline: success"))
117
e0acad552a92 Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents: 109
diff changeset
600 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
601 return DROPBEAR_SUCCESS;
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
602 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
603
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
604 }
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
605 #endif
095d689fed16 - Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents: 45
diff changeset
606
277
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
607 /* make sure that the socket closes */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
608 void m_close(int fd) {
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
609
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
610 int val;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
611 do {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
612 val = close(fd);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
613 } while (val < 0 && errno == EINTR);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
614
277
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Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
615 if (val < 0 && errno != EBADF) {
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
616 /* Linux says EIO can happen */
044bc108b9b3 * Per-IP connection unauthed connection limits
Matt Johnston <matt@ucc.asn.au>
parents: 258
diff changeset
617 dropbear_exit("Error closing fd %d, %s", fd, strerror(errno));
4
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parents:
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618 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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619 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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620
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
621 void * m_malloc(size_t size) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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622
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
623 void* ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
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624
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
625 if (size == 0) {
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Matt Johnston <matt@ucc.asn.au>
parents:
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626 dropbear_exit("m_malloc failed");
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Matt Johnston <matt@ucc.asn.au>
parents:
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627 }
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
628 ret = calloc(1, size);
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
629 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
630 dropbear_exit("m_malloc failed");
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
631 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
632 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
633
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
634 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
635
11
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
636 void * m_strdup(const char * str) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
637 char* ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
638
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
639 ret = strdup(str);
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
640 if (ret == NULL) {
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
641 dropbear_exit("m_strdup failed");
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
642 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
643 return ret;
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
644 }
f76c9389e9e0 Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents: 4
diff changeset
645
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
646 void __m_free(void* ptr) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
647 if (ptr != NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
648 free(ptr);
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
649 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
650 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
651
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
652 void * m_realloc(void* ptr, size_t size) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
653
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
654 void *ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
655
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
656 if (size == 0) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
657 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
658 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
659 ret = realloc(ptr, size);
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
660 if (ret == NULL) {
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
661 dropbear_exit("m_realloc failed");
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
662 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
663 return ret;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
664 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
665
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
666 /* 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
667 * "Secure Programming for Linux and Unix HOWTO" */
161
b9d3f725e00b 0.44 release changes
Matt Johnston <matt@ucc.asn.au>
parents: 160
diff changeset
668 /* 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
669 * optimised away */
4
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
670 void m_burn(void *data, unsigned int len) {
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parents:
diff changeset
671 volatile char *p = data;
fe6bca95afa7 Makefile.in contains updated files required
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parents:
diff changeset
672
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
673 if (data == NULL)
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
674 return;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
675 while (len--) {
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Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
676 *p++ = 0x66;
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
677 }
fe6bca95afa7 Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
678 }
26
0969767bca0d snapshot of stuff
Matt Johnston <matt@ucc.asn.au>
parents: 11
diff changeset
679
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
680
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
681 void setnonblocking(int fd) {
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
682
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
683 TRACE(("setnonblocking: %d", fd))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
684
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
685 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
686 if (errno == ENODEV) {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
687 /* 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
688 * 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
689 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
690 } else {
257f09a63dab * add SSH_ASKPASS support (based on patch from Paul Whittaker
Matt Johnston <matt@ucc.asn.au>
parents: 172
diff changeset
691 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
692 }
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
693 }
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
694 TRACE(("leave setnonblocking"))
109
2e9d1f29c50f merge of 50be59810e462f9f44f55e421227d6aa0b31982b
Matt Johnston <matt@ucc.asn.au>
parents: 108
diff changeset
695 }