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1 /* Copyright 2010 Ivo Smits <Ivo@UCIS.nl>. All rights reserved. |
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2 Redistribution and use in source and binary forms, with or without modification, are |
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3 permitted provided that the following conditions are met: |
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4 |
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5 1. Redistributions of source code must retain the above copyright notice, this list of |
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6 conditions and the following disclaimer. |
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7 |
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8 2. Redistributions in binary form must reproduce the above copyright notice, this list |
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9 of conditions and the following disclaimer in the documentation and/or other materials |
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10 provided with the distribution. |
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11 |
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12 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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13 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND |
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14 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR |
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15 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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16 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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17 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
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18 ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
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19 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
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20 ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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21 |
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22 The views and conclusions contained in the software and documentation are those of the |
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23 authors and should not be interpreted as representing official policies, either expressed |
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24 or implied, of Ivo Smits.*/ |
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25 |
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26 #include <stdio.h> |
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27 #include <stdlib.h> |
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28 #include <string.h> |
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29 #include <stdlib.h> |
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30 #include <dlfcn.h> |
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31 |
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32 char* getenvdeb(const char* name) { |
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33 char tmp[1024] = "IF_QT_"; |
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34 if (strcmp(name, "INTERFACE") == 0) return getenv("IFACE"); |
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35 if (strlen(tmp) + strlen(name) >= 1024) { |
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36 fprintf(stderr, "Error: prefixed environment variable name is too long"); |
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37 return NULL; |
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38 } |
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39 strcat(tmp, name); |
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40 return getenv(tmp); |
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41 } |
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42 |
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43 int main() { |
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44 /* Header */ |
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45 printf("UCIS QuickTun (c) 2010 Ivo Smits <Ivo@UCIS.nl>\n"); |
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46 printf("More information: http://wiki.qontrol.nl/QuickTun\n"); |
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47 |
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48 char* lib = NULL; |
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49 if (getenvdeb("PRIVATE_KEY")) { |
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50 lib = "libquicltun.nacl0"; |
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51 } else { |
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52 lib = "libquicltun.raw"; |
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53 } |
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54 |
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55 void* dl = dlopen(lib, RTLD_LAZY); |
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56 if (!dl) { |
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57 fprintf(stderr, "Error: library %s not found: %s\n", lib, dlerror()); |
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58 return -1; |
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59 } |
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60 void** getconfig = dlsym(dl, "getconf"); |
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61 if (!dl) { |
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62 fprintf(stderr, "Error: symbol getconf not found: %s\n", dlerror()); |
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63 return -1; |
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64 } |
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65 void* tunmain = dlsym(dl, "tunmain"); |
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66 if (!dl) { |
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67 fprintf(stderr, "Error: symbol tunmain not found: %s\n", dlerror()); |
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68 return -1; |
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69 } |
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70 |
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71 *getconfig = (void*)getenvdeb; |
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72 ((void (*)())tunmain)(); |
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73 } |
