root / logic / trunk / src / hci_comm / hci_comm_listener.c @ 24
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1 | 10 | Janez1 | /*
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2 | * hci_comm_listener.c
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3 | *
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4 | * 2011, Aleksander Besir (alex.besir@gmail.com)
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5 | *
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6 | */
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7 | |||
8 | #include "hci_comm.h" |
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9 | #include <sys/types.h> |
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10 | #include <sys/socket.h> |
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11 | #include <netinet/in.h> |
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12 | #include <arpa/inet.h> |
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13 | #include <stdio.h> |
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14 | #include <stdlib.h> |
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15 | #include <string.h> |
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16 | #include <unistd.h> |
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17 | |||
18 | int listenTo(unsigned short int portNum) { |
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19 | |||
20 | // Buffer
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21 | char *requestBuffer = malloc(HCI_COMM_REQUEST_BUFFER_SIZE * sizeof(char)); |
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22 | if(requestBuffer == NULL) { |
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23 | fprintf(stderr,"HCI comm error: Cannot allocate buffer.\n");
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24 | return HCI_COMM_ERR_BUF_ALOC_FAIL;
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25 | } |
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26 | |||
27 | // Socket holder
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28 | int socketHolder = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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29 | if(socketHolder < 0) { |
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30 | fprintf(stderr,"HCI comm error: Cannot create a new socket.\n");
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31 | return HCI_COMM_ERR_NEW_SOCKET_FAIL;
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32 | } |
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33 | |||
34 | // Socket address holder
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35 | struct sockaddr_in socketAddressHolder;
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36 | memset(&socketAddressHolder, 0, sizeof(socketAddressHolder)); |
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37 | socketAddressHolder.sin_family = AF_INET; |
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38 | socketAddressHolder.sin_port = htons(portNum); |
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39 | socketAddressHolder.sin_addr.s_addr = INADDR_ANY; |
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40 | |||
41 | // Bind socket to port
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42 | int bindingResult = bind(socketHolder,(struct sockaddr *)&socketAddressHolder, sizeof(socketAddressHolder)); |
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43 | if(bindingResult == -1) { |
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44 | fprintf(stderr,"HCI comm error: Cannot bind socket to port %d.\n",portNum);
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45 | close(socketHolder); |
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46 | return HCI_COMM_ERR_BIND_FAIL;
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47 | } |
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48 | |||
49 | // Listen to port
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50 | int listenResult = listen(socketHolder, 10); |
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51 | if(listenResult == -1) { |
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52 | fprintf(stderr,"HCI comm error: Cannot listen to port %d.\n",portNum);
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53 | close(socketHolder); |
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54 | return HCI_COMM_ERR_LISTEN_FAIL;
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55 | } |
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56 | |||
57 | // Infinite listening
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58 | while(1) { |
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59 | |||
60 | // Accept request
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61 | int connectionHolder = accept(socketHolder,NULL,NULL); |
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62 | if(connectionHolder < 0) { |
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63 | fprintf(stderr,"HCI comm error: Error accepting request.\n");
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64 | close(socketHolder); |
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65 | return HCI_COMM_ERR_ACCEPT_FAIL;
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66 | } |
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67 | |||
68 | // Read request
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69 | int readResult = read(connectionHolder,requestBuffer,HCI_COMM_REQUEST_BUFFER_SIZE);
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70 | if(readResult < 0) { |
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71 | fprintf(stderr,"HCI comm error: Error reading request.\n");
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72 | close(socketHolder); |
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73 | return HCI_COMM_ERR_READ_FAIL;
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74 | } |
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75 | |||
76 | // Create a response
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77 | char *hciResponse = "Works!"; // TODO |
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78 | int responseLength = 6; // TODO |
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79 | |||
80 | // Check if logic wants to terminate the infinite loop
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81 | if(responseLength == HCI_COMM_TERMINATE) {
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82 | break;
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83 | } |
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84 | |||
85 | // Send response
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86 | int writeResult = write(connectionHolder,hciResponse,responseLength);
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87 | if(writeResult < 0) { |
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88 | fprintf(stderr,"HCI comm error: Error writting response.\n");
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89 | close(socketHolder); |
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90 | return HCI_COMM_ERR_WRITE_FAIL;
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91 | } |
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92 | |||
93 | } |
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94 | |||
95 | // Terminate
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96 | close(socketHolder); |
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97 | free(requestBuffer); |
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98 | requestBuffer = NULL;
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99 | return HCI_COMM_TERMINATED_BY_LOGIC;
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100 | |||
101 | } |