root / logic / trunk / src / hci_comm / hci_comm_listener.c @ 39
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/*
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* hci_comm_listener.c
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*
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* 2011, Aleksander Besir (alex.besir@gmail.com)
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*
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*/
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#include "hci_comm.h" |
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#include <sys/types.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <arpa/inet.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <unistd.h> |
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int listenTo(unsigned short int portNum) { |
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// Buffer
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char *requestBuffer = malloc(HCI_COMM_REQUEST_BUFFER_SIZE * sizeof(char)); |
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if(requestBuffer == NULL) { |
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fprintf(stderr,"HCI comm error: Cannot allocate buffer.\n");
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return HCI_COMM_ERR_BUF_ALOC_FAIL;
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} |
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// Socket holder
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int socketHolder = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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if(socketHolder < 0) { |
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fprintf(stderr,"HCI comm error: Cannot create a new socket.\n");
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return HCI_COMM_ERR_NEW_SOCKET_FAIL;
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} |
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// Socket address holder
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struct sockaddr_in socketAddressHolder;
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memset(&socketAddressHolder, 0, sizeof(socketAddressHolder)); |
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socketAddressHolder.sin_family = AF_INET; |
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socketAddressHolder.sin_port = htons(portNum); |
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socketAddressHolder.sin_addr.s_addr = INADDR_ANY; |
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// Bind socket to port
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int bindingResult = bind(socketHolder,(struct sockaddr *)&socketAddressHolder, sizeof(socketAddressHolder)); |
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if(bindingResult == -1) { |
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fprintf(stderr,"HCI comm error: Cannot bind socket to port %d.\n",portNum);
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close(socketHolder); |
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return HCI_COMM_ERR_BIND_FAIL;
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} |
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// Listen to port
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int listenResult = listen(socketHolder, 10); |
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if(listenResult == -1) { |
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fprintf(stderr,"HCI comm error: Cannot listen to port %d.\n",portNum);
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close(socketHolder); |
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return HCI_COMM_ERR_LISTEN_FAIL;
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} |
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// Infinite listening
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while(1) { |
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// Accept request
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int connectionHolder = accept(socketHolder,NULL,NULL); |
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if(connectionHolder < 0) { |
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fprintf(stderr,"HCI comm error: Error accepting request.\n");
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close(socketHolder); |
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return HCI_COMM_ERR_ACCEPT_FAIL;
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} |
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// Read request
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int readResult = read(connectionHolder,requestBuffer,HCI_COMM_REQUEST_BUFFER_SIZE);
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if(readResult < 0) { |
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fprintf(stderr,"HCI comm error: Error reading request.\n");
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close(socketHolder); |
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return HCI_COMM_ERR_READ_FAIL;
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} |
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// Create a response
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char *hciResponse = "Works!"; // TODO |
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int responseLength = 6; // TODO |
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// Check if logic wants to terminate the infinite loop
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if(responseLength == HCI_COMM_TERMINATE) {
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break;
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} |
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// Send response
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int writeResult = write(connectionHolder,hciResponse,responseLength);
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if(writeResult < 0) { |
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fprintf(stderr,"HCI comm error: Error writting response.\n");
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close(socketHolder); |
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return HCI_COMM_ERR_WRITE_FAIL;
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} |
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} |
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// Terminate
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close(socketHolder); |
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free(requestBuffer); |
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requestBuffer = NULL;
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return HCI_COMM_TERMINATED_BY_LOGIC;
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} |