Mercurial > dropbear
annotate dbutil.c @ 254:8b62b0ea8f3b
* include netinet/in_systm.h if available before netinet/ip.h, since
netbsd seems to require it for some reason. hooray for many unices.
| author | Matt Johnston <matt@ucc.asn.au> |
|---|---|
| date | Mon, 31 Oct 2005 07:49:57 +0000 |
| parents | b02e8eef3c3a |
| children | 306499676384 |
| rev | line source |
|---|---|
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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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68 |
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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 |
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156 static void set_sock_priority(int sock) { |
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157 |
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158 int val; |
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159 |
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160 /* disable nagle */ |
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161 val = 1; |
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162 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val)); |
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163 |
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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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166 #ifdef IPTOS_LOWDELAY |
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167 val = IPTOS_LOWDELAY; |
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168 setsockopt(sock, IPPROTO_IP, IP_TOS, (void*)&val, sizeof(val)); |
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169 #endif |
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170 |
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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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174 val = 6; |
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175 setsockopt(sock, SOL_SOCKET, SO_PRIORITY, (void*) &val, sizeof(val)); |
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176 #endif |
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177 |
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178 } |
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179 |
| 62 | 180 /* Listen on address:port. Unless address is NULL, in which case listen on |
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181 * everything. If called with address == "", we'll listen on localhost/loopback. |
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182 * Returns the number of sockets bound on success, or -1 on failure. On |
| 62 | 183 * failure, if errstring wasn't NULL, it'll be a newly malloced error |
| 184 * string.*/ | |
| 185 int dropbear_listen(const char* address, const char* port, | |
| 186 int *socks, unsigned int sockcount, char **errstring, int *maxfd) { | |
| 187 | |
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188 struct addrinfo hints, *res = NULL, *res0 = NULL; |
| 62 | 189 int err; |
| 190 unsigned int nsock; | |
| 191 struct linger linger; | |
| 192 int val; | |
| 193 int sock; | |
| 194 | |
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195 TRACE(("enter dropbear_listen")) |
| 62 | 196 |
| 197 memset(&hints, 0, sizeof(hints)); | |
| 198 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */ | |
| 199 hints.ai_socktype = SOCK_STREAM; | |
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200 |
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201 if (address && address[0] == '\0') { |
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202 TRACE(("dropbear_listen: local loopback")) |
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203 address = NULL; |
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204 } else { |
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205 TRACE(("dropbear_listen: not local loopback")) |
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206 hints.ai_flags = AI_PASSIVE; |
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207 } |
| 62 | 208 err = getaddrinfo(address, port, &hints, &res0); |
| 209 | |
| 210 if (err) { | |
| 211 if (errstring != NULL && *errstring == NULL) { | |
| 212 int len; | |
| 213 len = 20 + strlen(gai_strerror(err)); | |
| 214 *errstring = (char*)m_malloc(len); | |
| 215 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err)); | |
| 216 } | |
|
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217 if (res0) { |
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218 freeaddrinfo(res0); |
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219 res0 = NULL; |
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220 } |
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221 TRACE(("leave dropbear_listen: failed resolving")) |
| 62 | 222 return -1; |
| 223 } | |
| 224 | |
| 225 | |
| 226 nsock = 0; | |
| 227 for (res = res0; res != NULL && nsock < sockcount; | |
| 228 res = res->ai_next) { | |
| 229 | |
| 230 /* Get a socket */ | |
| 231 socks[nsock] = socket(res->ai_family, res->ai_socktype, | |
| 232 res->ai_protocol); | |
| 233 | |
| 234 sock = socks[nsock]; /* For clarity */ | |
| 235 | |
| 236 if (sock < 0) { | |
| 237 err = errno; | |
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238 TRACE(("socket() failed")) |
| 62 | 239 continue; |
| 240 } | |
| 241 | |
| 242 /* Various useful socket options */ | |
| 243 val = 1; | |
| 244 /* set to reuse, quick timeout */ | |
| 245 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val)); | |
| 246 linger.l_onoff = 1; | |
| 247 linger.l_linger = 5; | |
| 248 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger)); | |
| 249 | |
|
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250 set_sock_priority(sock); |
| 62 | 251 |
| 252 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
| 253 err = errno; | |
| 254 close(sock); | |
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255 TRACE(("bind(%s) failed", port)) |
| 62 | 256 continue; |
| 257 } | |
| 258 | |
| 259 if (listen(sock, 20) < 0) { | |
| 260 err = errno; | |
| 261 close(sock); | |
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262 TRACE(("listen() failed")) |
| 62 | 263 continue; |
| 264 } | |
| 265 | |
| 266 *maxfd = MAX(*maxfd, sock); | |
| 267 | |
| 268 nsock++; | |
| 269 } | |
| 270 | |
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271 if (res0) { |
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272 freeaddrinfo(res0); |
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273 res0 = NULL; |
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274 } |
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275 |
| 62 | 276 if (nsock == 0) { |
| 277 if (errstring != NULL && *errstring == NULL) { | |
| 278 int len; | |
| 279 len = 20 + strlen(strerror(err)); | |
| 280 *errstring = (char*)m_malloc(len); | |
| 64 | 281 snprintf(*errstring, len, "Error listening: %s", strerror(err)); |
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282 TRACE(("leave dropbear_listen: failure, %s", strerror(err))) |
| 62 | 283 return -1; |
| 284 } | |
| 285 } | |
| 286 | |
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287 TRACE(("leave dropbear_listen: success, %d socks bound", nsock)) |
| 62 | 288 return nsock; |
| 289 } | |
| 290 | |
| 26 | 291 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will |
| 62 | 292 * return immediately if nonblocking is set. On failure, if errstring |
| 293 * wasn't null, it will be a newly malloced error message */ | |
| 294 | |
| 295 /* TODO: maxfd */ | |
| 26 | 296 int connect_remote(const char* remotehost, const char* remoteport, |
| 297 int nonblocking, char ** errstring) { | |
| 298 | |
| 299 struct addrinfo *res0 = NULL, *res = NULL, hints; | |
| 300 int sock; | |
| 301 int err; | |
| 302 | |
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303 TRACE(("enter connect_remote")) |
| 26 | 304 |
| 305 if (errstring != NULL) { | |
| 306 *errstring = NULL; | |
| 307 } | |
| 308 | |
| 309 memset(&hints, 0, sizeof(hints)); | |
| 310 hints.ai_socktype = SOCK_STREAM; | |
| 311 hints.ai_family = PF_UNSPEC; | |
| 312 | |
| 313 err = getaddrinfo(remotehost, remoteport, &hints, &res0); | |
| 314 if (err) { | |
| 315 if (errstring != NULL && *errstring == NULL) { | |
| 316 int len; | |
| 317 len = 20 + strlen(gai_strerror(err)); | |
| 318 *errstring = (char*)m_malloc(len); | |
| 319 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err)); | |
| 320 } | |
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321 TRACE(("Error resolving: %s", gai_strerror(err))) |
| 26 | 322 return -1; |
| 323 } | |
| 324 | |
| 325 sock = -1; | |
| 326 err = EADDRNOTAVAIL; | |
| 327 for (res = res0; res; res = res->ai_next) { | |
| 328 | |
| 329 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |
| 330 if (sock < 0) { | |
| 331 err = errno; | |
| 332 continue; | |
| 333 } | |
| 334 | |
| 335 if (nonblocking) { | |
| 336 if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) { | |
| 337 close(sock); | |
| 338 sock = -1; | |
| 339 if (errstring != NULL && *errstring == NULL) { | |
| 340 *errstring = m_strdup("Failed non-blocking"); | |
| 341 } | |
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342 TRACE(("Failed non-blocking: %s", strerror(errno))) |
| 26 | 343 continue; |
| 344 } | |
| 345 } | |
| 346 | |
| 347 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
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348 if (errno == EINPROGRESS && nonblocking) { |
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349 TRACE(("Connect in progress")) |
| 26 | 350 break; |
| 351 } else { | |
| 352 err = errno; | |
| 353 close(sock); | |
| 354 sock = -1; | |
| 355 continue; | |
| 356 } | |
| 357 } | |
| 358 | |
| 359 break; /* Success */ | |
| 360 } | |
| 361 | |
|
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362 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) { |
| 26 | 363 /* Failed */ |
| 364 if (errstring != NULL && *errstring == NULL) { | |
| 365 int len; | |
| 366 len = 20 + strlen(strerror(err)); | |
| 367 *errstring = (char*)m_malloc(len); | |
| 368 snprintf(*errstring, len, "Error connecting: %s", strerror(err)); | |
| 369 } | |
|
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370 TRACE(("Error connecting: %s", strerror(err))) |
| 26 | 371 } else { |
| 372 /* Success */ | |
|
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373 set_sock_priority(sock); |
| 26 | 374 } |
| 375 | |
| 376 freeaddrinfo(res0); | |
| 62 | 377 if (sock > 0 && errstring != NULL && *errstring != NULL) { |
| 378 m_free(*errstring); | |
| 379 } | |
| 26 | 380 |
|
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381 TRACE(("leave connect_remote: sock %d\n", sock)) |
| 26 | 382 return sock; |
| 383 } | |
| 384 | |
|
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385 /* Return a string representation of the socket address passed. The return |
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386 * value is allocated with malloc() */ |
| 62 | 387 unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) { |
|
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388 |
| 62 | 389 char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; |
| 390 char *retstring = NULL; | |
| 391 int ret; | |
| 392 unsigned int len; | |
|
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393 |
| 62 | 394 len = sizeof(struct sockaddr_storage); |
|
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395 /* Some platforms such as Solaris 8 require that len is the length |
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396 * of the specific structure. */ |
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397 if (addr->ss_family == AF_INET) { |
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398 len = sizeof(struct sockaddr_in); |
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399 } |
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400 #ifdef AF_INET6 |
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401 if (addr->ss_family == AF_INET6) { |
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402 len = sizeof(struct sockaddr_in6); |
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403 } |
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404 #endif |
| 62 | 405 |
| 406 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), | |
| 407 sbuf, sizeof(sbuf), NI_NUMERICSERV | NI_NUMERICHOST); | |
|
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408 |
| 62 | 409 if (ret != 0) { |
| 410 /* This is a fairly bad failure - it'll fallback to IP if it | |
| 411 * just can't resolve */ | |
| 412 dropbear_exit("failed lookup (%d, %d)", ret, errno); | |
| 413 } | |
|
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414 |
| 62 | 415 if (withport) { |
| 416 len = strlen(hbuf) + 2 + strlen(sbuf); | |
| 417 retstring = (char*)m_malloc(len); | |
| 418 snprintf(retstring, len, "%s:%s", hbuf, sbuf); | |
| 419 } else { | |
| 420 retstring = m_strdup(hbuf); | |
| 421 } | |
|
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422 |
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423 return retstring; |
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424 |
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425 } |
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426 |
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427 /* Get the hostname corresponding to the address addr. On failure, the IP |
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428 * address is returned. The return value is allocated with strdup() */ |
| 62 | 429 char* getaddrhostname(struct sockaddr_storage * addr) { |
|
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430 |
| 62 | 431 char hbuf[NI_MAXHOST]; |
| 432 char sbuf[NI_MAXSERV]; | |
| 433 int ret; | |
| 434 unsigned int len; | |
|
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435 #ifdef DO_HOST_LOOKUP |
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436 const int flags = NI_NUMERICSERV; |
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437 #else |
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438 const int flags = NI_NUMERICHOST | NI_NUMERICSERV; |
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439 #endif |
| 62 | 440 |
| 441 len = sizeof(struct sockaddr_storage); | |
|
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442 /* Some platforms such as Solaris 8 require that len is the length |
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443 * of the specific structure. */ |
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444 if (addr->ss_family == AF_INET) { |
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445 len = sizeof(struct sockaddr_in); |
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446 } |
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447 #ifdef AF_INET6 |
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448 if (addr->ss_family == AF_INET6) { |
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449 len = sizeof(struct sockaddr_in6); |
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450 } |
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451 #endif |
|
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452 |
|
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453 |
| 62 | 454 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), |
|
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455 sbuf, sizeof(sbuf), flags); |
| 62 | 456 |
| 457 if (ret != 0) { | |
| 458 /* On some systems (Darwin does it) we get EINTR from getnameinfo | |
| 459 * somehow. Eew. So we'll just return the IP, since that doesn't seem | |
| 460 * to exhibit that behaviour. */ | |
| 461 return getaddrstring(addr, 0); | |
|
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462 } |
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463 |
| 62 | 464 return m_strdup(hbuf); |
|
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465 } |
| 62 | 466 |
|
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467 #ifdef DEBUG_TRACE |
|
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468 void printhex(const char * label, const unsigned char * buf, int len) { |
|
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469 |
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470 int i; |
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471 |
|
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472 fprintf(stderr, "%s\n", label); |
|
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473 for (i = 0; i < len; i++) { |
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474 fprintf(stderr, "%02x", buf[i]); |
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475 if (i % 16 == 15) { |
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476 fprintf(stderr, "\n"); |
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477 } |
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478 else if (i % 2 == 1) { |
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479 fprintf(stderr, " "); |
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480 } |
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481 } |
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482 fprintf(stderr, "\n"); |
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483 } |
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484 #endif |
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485 |
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486 /* Strip all control characters from text (a null-terminated string), except |
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487 * for '\n', '\r' and '\t'. |
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488 * The result returned is a newly allocated string, this must be free()d after |
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489 * use */ |
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490 char * stripcontrol(const char * text) { |
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491 |
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492 char * ret; |
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493 int len, pos; |
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494 int i; |
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495 |
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496 len = strlen(text); |
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497 ret = m_malloc(len+1); |
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498 |
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499 pos = 0; |
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500 for (i = 0; i < len; i++) { |
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501 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */ |
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502 || text[i] == '\n' || text[i] == '\r' || text[i] == '\t') { |
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503 ret[pos] = text[i]; |
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504 pos++; |
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505 } |
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506 } |
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507 ret[pos] = 0x0; |
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508 return ret; |
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509 } |
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510 |
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511 |
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512 /* reads the contents of filename into the buffer buf, from the current |
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513 * position, either to the end of the file, or the buffer being full. |
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514 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
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515 int buf_readfile(buffer* buf, const char* filename) { |
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516 |
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517 int fd; |
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518 int len; |
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519 int maxlen; |
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520 |
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521 fd = open(filename, O_RDONLY); |
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522 |
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523 if (fd < 0) { |
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524 close(fd); |
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525 return DROPBEAR_FAILURE; |
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526 } |
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|
527 |
|
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
528 do { |
|
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parents:
diff
changeset
|
529 maxlen = buf->size - buf->pos; |
|
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parents:
diff
changeset
|
530 len = read(fd, buf_getwriteptr(buf, maxlen), |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
531 maxlen); |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
532 buf_incrwritepos(buf, len); |
|
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
533 } while (len < maxlen && len > 0); |
|
fe6bca95afa7
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parents:
diff
changeset
|
534 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
535 close(fd); |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
536 return DROPBEAR_SUCCESS; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
537 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
538 |
|
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
539 /* 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
|
540 * authkeys file. |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
541 * 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
|
542 /* 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
|
543 #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
|
544 int buf_getline(buffer * line, FILE * authfile) { |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
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parents:
45
diff
changeset
|
545 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
546 int c = EOF; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
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|
547 |
|
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
|
548 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
|
549 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
550 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
|
551 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
|
552 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
553 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
|
554 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
555 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
|
556 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
|
557 goto out; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
558 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
559 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
560 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
|
561 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
562 |
|
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
|
563 TRACE(("leave getauthline: line too long")) |
|
51
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- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
564 /* We return success, but the line length will be zeroed - ie we just |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
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parents:
45
diff
changeset
|
565 * ignore that line */ |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
566 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
|
567 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
568 out: |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
569 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
570 |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
571 /* 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
|
572 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
|
573 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
|
574 return DROPBEAR_FAILURE; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
575 } 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
|
576 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
|
577 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
|
578 return DROPBEAR_SUCCESS; |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
579 } |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
580 |
|
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 #endif |
|
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
583 |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
584 /* loop until the socket is closed (in case of EINTR) or |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
585 * we get and error. |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
586 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
|
fe6bca95afa7
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parents:
diff
changeset
|
587 int m_close(int fd) { |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
588 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
589 int val; |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
590 do { |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
591 val = close(fd); |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
592 } while (val < 0 && errno == EINTR); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
593 |
|
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
594 if (val == 0 || errno == EBADF) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
595 return DROPBEAR_SUCCESS; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
596 } else { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
597 return DROPBEAR_FAILURE; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
598 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
599 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
600 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
601 void * m_malloc(size_t size) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
602 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
603 void* ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
604 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
605 if (size == 0) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
606 dropbear_exit("m_malloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
607 } |
|
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
|
608 ret = calloc(1, size); |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
609 if (ret == NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
610 dropbear_exit("m_malloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
611 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
612 return ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
613 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
614 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
615 |
|
11
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
616 void * m_strdup(const char * str) { |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
617 char* ret; |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
618 |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
619 ret = strdup(str); |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
620 if (ret == NULL) { |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
621 dropbear_exit("m_strdup failed"); |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
622 } |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
623 return ret; |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
624 } |
|
f76c9389e9e0
Mostly done with the listener changeover
Matt Johnston <matt@ucc.asn.au>
parents:
4
diff
changeset
|
625 |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
626 void __m_free(void* ptr) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
627 if (ptr != NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
628 free(ptr); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
629 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
630 } |
|
fe6bca95afa7
Makefile.in contains updated files required
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 void * m_realloc(void* ptr, size_t size) { |
|
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 void *ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
635 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
636 if (size == 0) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
637 dropbear_exit("m_realloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
638 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
639 ret = realloc(ptr, size); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
640 if (ret == NULL) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
641 dropbear_exit("m_realloc failed"); |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
642 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
643 return ret; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
644 } |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
645 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
646 /* 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
|
647 * "Secure Programming for Linux and Unix HOWTO" */ |
| 161 | 648 /* Beware of calling this from within dbutil.c - things might get |
| 649 * optimised away */ | |
|
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
650 void m_burn(void *data, unsigned int len) { |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
651 volatile char *p = data; |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
652 |
|
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
653 if (data == NULL) |
|
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654 return; |
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655 while (len--) { |
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656 *p++ = 0x66; |
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657 } |
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658 } |
| 26 | 659 |
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660 |
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661 void setnonblocking(int fd) { |
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662 |
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663 TRACE(("setnonblocking: %d", fd)) |
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664 |
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665 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) { |
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666 if (errno == ENODEV) { |
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667 /* Some devices (like /dev/null redirected in) |
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668 * can't be set to non-blocking */ |
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669 TRACE(("ignoring ENODEV for setnonblocking")) |
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670 } else { |
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671 dropbear_exit("Couldn't set nonblocking"); |
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672 } |
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673 } |
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674 TRACE(("leave setnonblocking")) |
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675 } |