Mercurial > dropbear
annotate dbutil.c @ 160:7ceceb46d655
Fix so that getnameinfo() is passed the address-specific structure size. This
lets it work on Solaris (and probably other platforms)
author | Matt Johnston <matt@ucc.asn.au> |
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date | Sun, 02 Jan 2005 12:04:45 +0000 |
parents | 82fcf3185616 |
children | b9d3f725e00b |
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 |
108
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113 static void generic_dropbear_log(int UNUSED(priority), const char* format, |
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114 va_list param) { |
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115 |
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116 char printbuf[1024]; |
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117 |
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118 vsnprintf(printbuf, sizeof(printbuf), format, param); |
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119 |
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120 fprintf(stderr, "%s\n", printbuf); |
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121 |
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122 } |
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123 |
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124 /* this is what can be called to write arbitrary log messages */ |
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125 void dropbear_log(int priority, const char* format, ...) { |
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126 |
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127 va_list param; |
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128 |
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129 va_start(param, format); |
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130 _dropbear_log(priority, format, param); |
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131 va_end(param); |
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132 } |
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133 |
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134 |
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135 #ifdef DEBUG_TRACE |
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136 void dropbear_trace(const char* format, ...) { |
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137 |
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138 va_list param; |
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139 |
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140 if (!debug_trace) { |
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141 return; |
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142 } |
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143 |
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144 va_start(param, format); |
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145 fprintf(stderr, "TRACE: "); |
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146 vfprintf(stderr, format, param); |
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147 fprintf(stderr, "\n"); |
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148 va_end(param); |
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149 } |
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150 #endif /* DEBUG_TRACE */ |
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151 |
62 | 152 /* Listen on address:port. Unless address is NULL, in which case listen on |
63
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153 * everything. If called with address == "", we'll listen on localhost/loopback. |
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154 * Returns the number of sockets bound on success, or -1 on failure. On |
62 | 155 * failure, if errstring wasn't NULL, it'll be a newly malloced error |
156 * string.*/ | |
157 int dropbear_listen(const char* address, const char* port, | |
158 int *socks, unsigned int sockcount, char **errstring, int *maxfd) { | |
159 | |
70
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160 struct addrinfo hints, *res = NULL, *res0 = NULL; |
62 | 161 int err; |
162 unsigned int nsock; | |
163 struct linger linger; | |
164 int val; | |
165 int sock; | |
166 | |
167 TRACE(("enter dropbear_listen")); | |
168 | |
169 memset(&hints, 0, sizeof(hints)); | |
170 hints.ai_family = AF_UNSPEC; /* TODO: let them flag v4 only etc */ | |
171 hints.ai_socktype = SOCK_STREAM; | |
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172 |
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173 if (address && address[0] == '\0') { |
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174 TRACE(("dropbear_listen: local loopback")); |
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175 address = NULL; |
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176 } else { |
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177 TRACE(("dropbear_listen: not local loopback")); |
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178 hints.ai_flags = AI_PASSIVE; |
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179 } |
62 | 180 err = getaddrinfo(address, port, &hints, &res0); |
181 | |
182 if (err) { | |
183 if (errstring != NULL && *errstring == NULL) { | |
184 int len; | |
185 len = 20 + strlen(gai_strerror(err)); | |
186 *errstring = (char*)m_malloc(len); | |
187 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err)); | |
188 } | |
189 TRACE(("leave dropbear_listen: failed resolving")); | |
190 return -1; | |
191 } | |
192 | |
193 | |
194 nsock = 0; | |
195 for (res = res0; res != NULL && nsock < sockcount; | |
196 res = res->ai_next) { | |
197 | |
198 /* Get a socket */ | |
199 socks[nsock] = socket(res->ai_family, res->ai_socktype, | |
200 res->ai_protocol); | |
201 | |
202 sock = socks[nsock]; /* For clarity */ | |
203 | |
204 if (sock < 0) { | |
205 err = errno; | |
206 TRACE(("socket() failed")); | |
207 continue; | |
208 } | |
209 | |
210 /* Various useful socket options */ | |
211 val = 1; | |
212 /* set to reuse, quick timeout */ | |
213 setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void*) &val, sizeof(val)); | |
214 linger.l_onoff = 1; | |
215 linger.l_linger = 5; | |
216 setsockopt(sock, SOL_SOCKET, SO_LINGER, (void*)&linger, sizeof(linger)); | |
217 | |
218 /* disable nagle */ | |
219 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&val, sizeof(val)); | |
220 | |
221 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
222 err = errno; | |
223 close(sock); | |
64 | 224 TRACE(("bind(%s) failed", port)); |
62 | 225 continue; |
226 } | |
227 | |
228 if (listen(sock, 20) < 0) { | |
229 err = errno; | |
230 close(sock); | |
231 TRACE(("listen() failed")); | |
232 continue; | |
233 } | |
234 | |
235 *maxfd = MAX(*maxfd, sock); | |
236 | |
237 nsock++; | |
238 } | |
239 | |
240 if (nsock == 0) { | |
241 if (errstring != NULL && *errstring == NULL) { | |
242 int len; | |
243 len = 20 + strlen(strerror(err)); | |
244 *errstring = (char*)m_malloc(len); | |
64 | 245 snprintf(*errstring, len, "Error listening: %s", strerror(err)); |
62 | 246 TRACE(("leave dropbear_listen: failure, %s", strerror(err))); |
247 return -1; | |
248 } | |
249 } | |
250 | |
251 TRACE(("leave dropbear_listen: success, %d socks bound", nsock)); | |
252 return nsock; | |
253 } | |
254 | |
26 | 255 /* Connect via TCP to a host. Connection will try ipv4 or ipv6, will |
62 | 256 * return immediately if nonblocking is set. On failure, if errstring |
257 * wasn't null, it will be a newly malloced error message */ | |
258 | |
259 /* TODO: maxfd */ | |
26 | 260 int connect_remote(const char* remotehost, const char* remoteport, |
261 int nonblocking, char ** errstring) { | |
262 | |
263 struct addrinfo *res0 = NULL, *res = NULL, hints; | |
264 int sock; | |
265 int err; | |
266 | |
267 TRACE(("enter connect_remote")); | |
268 | |
269 if (errstring != NULL) { | |
270 *errstring = NULL; | |
271 } | |
272 | |
273 memset(&hints, 0, sizeof(hints)); | |
274 hints.ai_socktype = SOCK_STREAM; | |
275 hints.ai_family = PF_UNSPEC; | |
276 | |
277 err = getaddrinfo(remotehost, remoteport, &hints, &res0); | |
278 if (err) { | |
279 if (errstring != NULL && *errstring == NULL) { | |
280 int len; | |
281 len = 20 + strlen(gai_strerror(err)); | |
282 *errstring = (char*)m_malloc(len); | |
283 snprintf(*errstring, len, "Error resolving: %s", gai_strerror(err)); | |
284 } | |
285 TRACE(("Error resolving: %s", gai_strerror(err))); | |
286 return -1; | |
287 } | |
288 | |
289 sock = -1; | |
290 err = EADDRNOTAVAIL; | |
291 for (res = res0; res; res = res->ai_next) { | |
292 | |
293 sock = socket(res->ai_family, res->ai_socktype, res->ai_protocol); | |
294 if (sock < 0) { | |
295 err = errno; | |
296 continue; | |
297 } | |
298 | |
299 if (nonblocking) { | |
300 if (fcntl(sock, F_SETFL, O_NONBLOCK) < 0) { | |
301 close(sock); | |
302 sock = -1; | |
303 if (errstring != NULL && *errstring == NULL) { | |
304 *errstring = m_strdup("Failed non-blocking"); | |
305 } | |
306 TRACE(("Failed non-blocking: %s", strerror(errno))); | |
307 continue; | |
308 } | |
309 } | |
310 | |
311 if (connect(sock, res->ai_addr, res->ai_addrlen) < 0) { | |
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312 if (errno == EINPROGRESS && nonblocking) { |
26 | 313 TRACE(("Connect in progress")); |
314 break; | |
315 } else { | |
316 err = errno; | |
317 close(sock); | |
318 sock = -1; | |
319 continue; | |
320 } | |
321 } | |
322 | |
323 break; /* Success */ | |
324 } | |
325 | |
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326 if (sock < 0 && !(errno == EINPROGRESS && nonblocking)) { |
26 | 327 /* Failed */ |
328 if (errstring != NULL && *errstring == NULL) { | |
329 int len; | |
330 len = 20 + strlen(strerror(err)); | |
331 *errstring = (char*)m_malloc(len); | |
332 snprintf(*errstring, len, "Error connecting: %s", strerror(err)); | |
333 } | |
334 TRACE(("Error connecting: %s", strerror(err))); | |
335 } else { | |
336 /* Success */ | |
337 /* (err is used as a dummy var here) */ | |
338 setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (void*)&err, sizeof(err)); | |
339 } | |
340 | |
341 freeaddrinfo(res0); | |
62 | 342 if (sock > 0 && errstring != NULL && *errstring != NULL) { |
343 m_free(*errstring); | |
344 } | |
26 | 345 |
62 | 346 TRACE(("leave connect_remote: sock %d\n", sock)); |
26 | 347 return sock; |
348 } | |
349 | |
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350 /* Return a string representation of the socket address passed. The return |
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351 * value is allocated with malloc() */ |
62 | 352 unsigned char * getaddrstring(struct sockaddr_storage* addr, int withport) { |
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353 |
62 | 354 char hbuf[NI_MAXHOST], sbuf[NI_MAXSERV]; |
355 char *retstring = NULL; | |
356 int ret; | |
357 unsigned int len; | |
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358 |
62 | 359 len = sizeof(struct sockaddr_storage); |
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360 /* Some platforms such as Solaris 8 require that len is the length |
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361 * of the specific structure. */ |
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362 if (addr->ss_family == AF_INET) { |
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363 len = sizeof(struct sockaddr_in); |
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364 } |
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365 #ifdef AF_INET6 |
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366 if (addr->ss_family == AF_INET6) { |
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367 len = sizeof(struct sockaddr_in6); |
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368 } |
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369 #endif |
62 | 370 |
371 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), | |
372 sbuf, sizeof(sbuf), NI_NUMERICSERV | NI_NUMERICHOST); | |
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373 |
62 | 374 if (ret != 0) { |
375 /* This is a fairly bad failure - it'll fallback to IP if it | |
376 * just can't resolve */ | |
377 dropbear_exit("failed lookup (%d, %d)", ret, errno); | |
378 } | |
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379 |
62 | 380 if (withport) { |
381 len = strlen(hbuf) + 2 + strlen(sbuf); | |
382 retstring = (char*)m_malloc(len); | |
383 snprintf(retstring, len, "%s:%s", hbuf, sbuf); | |
384 } else { | |
385 retstring = m_strdup(hbuf); | |
386 } | |
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387 |
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388 return retstring; |
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389 |
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390 } |
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391 |
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392 /* Get the hostname corresponding to the address addr. On failure, the IP |
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393 * address is returned. The return value is allocated with strdup() */ |
62 | 394 char* getaddrhostname(struct sockaddr_storage * addr) { |
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395 |
62 | 396 char hbuf[NI_MAXHOST]; |
397 char sbuf[NI_MAXSERV]; | |
398 int ret; | |
399 unsigned int len; | |
400 | |
401 len = sizeof(struct sockaddr_storage); | |
160
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402 /* Some platforms such as Solaris 8 require that len is the length |
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403 * of the specific structure. */ |
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404 if (addr->ss_family == AF_INET) { |
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405 len = sizeof(struct sockaddr_in); |
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406 } |
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407 #ifdef AF_INET6 |
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408 if (addr->ss_family == AF_INET6) { |
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409 len = sizeof(struct sockaddr_in6); |
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410 } |
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411 #endif |
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412 |
62 | 413 ret = getnameinfo((struct sockaddr*)addr, len, hbuf, sizeof(hbuf), |
414 sbuf, sizeof(sbuf), NI_NUMERICSERV); | |
415 | |
416 if (ret != 0) { | |
417 /* On some systems (Darwin does it) we get EINTR from getnameinfo | |
418 * somehow. Eew. So we'll just return the IP, since that doesn't seem | |
419 * to exhibit that behaviour. */ | |
420 return getaddrstring(addr, 0); | |
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421 } |
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422 |
62 | 423 return m_strdup(hbuf); |
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424 } |
62 | 425 |
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426 #ifdef DEBUG_TRACE |
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427 void printhex(unsigned char* buf, int len) { |
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428 |
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429 int i; |
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430 |
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431 for (i = 0; i < len; i++) { |
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432 fprintf(stderr, "%02x", buf[i]); |
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433 if (i % 16 == 15) { |
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434 fprintf(stderr, "\n"); |
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435 } |
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436 else if (i % 2 == 1) { |
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
437 fprintf(stderr, " "); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
438 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
439 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
440 fprintf(stderr, "\n"); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
441 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
442 #endif |
fe6bca95afa7
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parents:
diff
changeset
|
443 |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
444 /* 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
|
445 * for '\n', '\r' and '\t'. |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
446 * 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
|
447 * use */ |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
448 char * stripcontrol(const char * text) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
449 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
450 char * ret; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
451 int len, pos; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
452 int i; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
453 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
454 len = strlen(text); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
455 ret = m_malloc(len+1); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
456 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
457 pos = 0; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
458 for (i = 0; i < len; i++) { |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
459 if ((text[i] <= '~' && text[i] >= ' ') /* normal printable range */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
460 || 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
|
461 ret[pos] = text[i]; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
462 pos++; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
463 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
464 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
465 ret[pos] = 0x0; |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
466 return ret; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
467 } |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
468 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
469 |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
470 /* reads the contents of filename into the buffer buf, from the current |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
471 * position, either to the end of the file, or the buffer being full. |
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Makefile.in contains updated files required
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parents:
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|
472 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
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parents:
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changeset
|
473 int buf_readfile(buffer* buf, const char* filename) { |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
474 |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
475 int fd; |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
476 int len; |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
477 int maxlen; |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
478 |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
479 fd = open(filename, O_RDONLY); |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
480 |
fe6bca95afa7
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parents:
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changeset
|
481 if (fd < 0) { |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
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changeset
|
482 close(fd); |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
483 return DROPBEAR_FAILURE; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
484 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
485 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
486 do { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
487 maxlen = buf->size - buf->pos; |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
488 len = read(fd, buf_getwriteptr(buf, maxlen), |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
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changeset
|
489 maxlen); |
fe6bca95afa7
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parents:
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changeset
|
490 buf_incrwritepos(buf, len); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
491 } while (len < maxlen && len > 0); |
fe6bca95afa7
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parents:
diff
changeset
|
492 |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
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changeset
|
493 close(fd); |
fe6bca95afa7
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parents:
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|
494 return DROPBEAR_SUCCESS; |
fe6bca95afa7
Makefile.in contains updated files required
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parents:
diff
changeset
|
495 } |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
496 |
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
497 /* 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.
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parents:
45
diff
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|
498 * authkeys file. |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
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parents:
45
diff
changeset
|
499 * 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
|
500 /* 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
|
501 #if defined(DROPBEAR_CLIENT) || defined(ENABLE_SVR_PUBKEY_AUTH) |
51
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
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parents:
45
diff
changeset
|
502 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
|
503 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
504 int c = EOF; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
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parents:
45
diff
changeset
|
505 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
506 TRACE(("enter buf_getline")); |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
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parents:
45
diff
changeset
|
507 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
508 buf_setpos(line, 0); |
095d689fed16
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parents:
45
diff
changeset
|
509 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
|
510 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
511 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
|
512 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
513 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
|
514 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
|
515 goto out; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
516 } |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
517 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
518 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
|
519 } |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
520 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
521 TRACE(("leave getauthline: line too long")); |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
522 /* 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
|
523 * ignore that line */ |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
524 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
|
525 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
526 out: |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
527 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
528 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
529 /* 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
|
530 if (c == EOF && line->pos == 0) { |
117
e0acad552a92
Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents:
109
diff
changeset
|
531 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
|
532 return DROPBEAR_FAILURE; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
533 } else { |
117
e0acad552a92
Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents:
109
diff
changeset
|
534 TRACE(("leave buf_getline: success")); |
e0acad552a92
Read the last line of a file without a finishing '\n' correctly
Matt Johnston <matt@ucc.asn.au>
parents:
109
diff
changeset
|
535 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
|
536 return DROPBEAR_SUCCESS; |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
537 } |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
538 |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
539 } |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
540 #endif |
095d689fed16
- Hostkey checking is mostly there, just aren't appending yet.
Matt Johnston <matt@ucc.asn.au>
parents:
45
diff
changeset
|
541 |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
542 /* 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
|
543 * we get and error. |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
544 * Returns DROPBEAR_SUCCESS or DROPBEAR_FAILURE */ |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
545 int m_close(int fd) { |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
546 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
547 int val; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
548 do { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
549 val = close(fd); |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
550 } while (val < 0 && errno == EINTR); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
551 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
552 if (val == 0 || errno == EBADF) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
553 return DROPBEAR_SUCCESS; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
554 } else { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
555 return DROPBEAR_FAILURE; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
556 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
557 } |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
558 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
559 void * m_malloc(size_t size) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
560 |
fe6bca95afa7
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
561 void* ret; |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
562 |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
563 if (size == 0) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
564 dropbear_exit("m_malloc failed"); |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
565 } |
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
|
566 ret = calloc(1, size); |
4
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
567 if (ret == NULL) { |
fe6bca95afa7
Makefile.in contains updated files required
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
568 dropbear_exit("m_malloc failed"); |
fe6bca95afa7
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569 } |
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570 return ret; |
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571 |
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572 } |
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573 |
11
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574 void * m_strdup(const char * str) { |
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575 char* ret; |
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576 |
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577 ret = strdup(str); |
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578 if (ret == NULL) { |
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579 dropbear_exit("m_strdup failed"); |
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580 } |
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581 return ret; |
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582 } |
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583 |
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584 void __m_free(void* ptr) { |
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585 if (ptr != NULL) { |
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586 free(ptr); |
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587 } |
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588 } |
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589 |
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590 void * m_realloc(void* ptr, size_t size) { |
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591 |
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592 void *ret; |
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593 |
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594 if (size == 0) { |
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595 dropbear_exit("m_realloc failed"); |
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596 } |
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597 ret = realloc(ptr, size); |
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598 if (ret == NULL) { |
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599 dropbear_exit("m_realloc failed"); |
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600 } |
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601 return ret; |
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602 } |
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603 |
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604 /* Clear the data, based on the method in David Wheeler's |
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605 * "Secure Programming for Linux and Unix HOWTO" */ |
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606 void m_burn(void *data, unsigned int len) { |
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607 volatile char *p = data; |
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608 |
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609 if (data == NULL) |
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610 return; |
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611 while (len--) { |
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612 *p++ = 0x66; |
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613 } |
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614 } |
26 | 615 |
109
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616 |
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617 void setnonblocking(int fd) { |
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618 |
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619 TRACE(("setnonblocking: %d", fd)); |
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620 |
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621 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0) { |
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622 dropbear_exit("Couldn't set nonblocking"); |
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623 } |
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624 TRACE(("leave setnonblocking")); |
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625 } |