1 | /* Virginia Tech Cognitive Radio Open Source Systems |
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2 | * Virginia Tech, 2009 |
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3 | * |
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4 | * LICENSE INFORMATION GOES HERE |
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5 | */ |
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6 | |
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7 | /* Implementation file for the VCROSS Cognitive Radio public API defined in |
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8 | * include/libvtcross.h. |
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9 | * |
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10 | * MORE INFO HERE |
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11 | */ |
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12 | |
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13 | #include <cstdlib> |
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14 | |
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15 | #include "vtcross/common.h" |
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16 | #include "vtcross/debug.h" |
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17 | #include "vtcross/libvtcross.h" |
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18 | |
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19 | |
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20 | uint32_t |
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21 | ConnectToRemoteComponent() |
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22 | { |
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23 | uint32_t socket; |
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24 | socket = ClientSocket("localhost", "40000"); |
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25 | |
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26 | return socket; |
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27 | } |
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28 | |
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29 | |
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30 | /* Given a certain set of observables, ask the radio to find the optimum radio |
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31 | * parameters and return them. |
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32 | * |
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33 | * TODO I'm a little confused about this function... why would anyone need to |
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34 | * use this? Shouldn't this be internal to the radio operation? |
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35 | * |
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36 | * TODO this function is returning a pointer to allocated memory, which is fine, |
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37 | * but we need to document this and make sure the caller is deallocating the |
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38 | * memory when it is done using it. |
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39 | */ |
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40 | Parameter* |
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41 | GetOptimalParameters(Observable *radioObservables, uint32_t numObservables) |
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42 | { |
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43 | char var[50]; |
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44 | char counter[55]; |
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45 | char buffer[256]; |
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46 | |
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47 | uint32_t socketFD = ConnectToRemoteComponent(); |
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48 | SendMessage(socketFD, "request_optimization"); |
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49 | |
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50 | /* Get number of observables to send. This information needs to be |
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51 | * sent to the Cognitive Radio Shell also. |
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52 | */ |
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53 | |
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54 | // Send Observables |
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55 | sprintf(counter, "%i", numObservables); |
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56 | SendMessage(socketFD, counter); |
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57 | for(size_t i = 0; i < numObservables; i++) { |
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58 | SendMessage(socketFD, radioObservables[i].name.c_str()); |
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59 | sprintf(var, "%f", radioObservables[i].value); |
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60 | SendMessage(socketFD, var); |
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61 | } |
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62 | |
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63 | /* Receive Set of Parameters */ |
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64 | memset(buffer, 0, 256); |
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65 | ReadMessage(socketFD, buffer); |
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66 | int32_t numParameters = atoi(buffer); |
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67 | Parameter *pList = new Parameter[numParameters]; |
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68 | |
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69 | for(ssize_t i = 0; i < numParameters; i++) { |
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70 | memset(buffer, 0, 256); |
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71 | ReadMessage(socketFD, buffer); |
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72 | pList[i].name = std::string(buffer); |
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73 | |
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74 | memset(buffer, 0, 256); |
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75 | ReadMessage(socketFD, buffer); |
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76 | pList[i].value = atof(buffer); |
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77 | } |
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78 | |
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79 | return pList; |
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80 | } |
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81 | |
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