136 lines
3.1 KiB
C++
136 lines
3.1 KiB
C++
/*
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* Copyright (C) 2018 dimercur
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file server.cpp
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* \author PE.Hladik
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* \version 1.0
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* \date 06/06/2017
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* \brief Library for opening a TCP server, receiving data and sending message to monitor
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*/
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#include "server.h"
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <netinet/in.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "image.h"
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#include "monitor.h"
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#define NB_CONNECTION_MAX 1
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int socketFD = -1;
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int clientID = -1;
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char* imgMsg = NULL;
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int openServer(int port) {
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struct sockaddr_in server;
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socketFD = socket(AF_INET, SOCK_STREAM, 0);
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if (socketFD < 0) {
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perror("Can not create socket");
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exit(-1);
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}
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server.sin_addr.s_addr = INADDR_ANY;
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server.sin_family = AF_INET;
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server.sin_port = htons(port);
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if (bind(socketFD, (struct sockaddr *) &server, sizeof (server)) < 0) {
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perror("Can not bind socket");
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exit(-1);
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}
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listen(socketFD, NB_CONNECTION_MAX);
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return socketFD;
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}
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int closeServer() {
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close(socketFD);
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socketFD = -1;
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return 0;
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}
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int acceptClient() {
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struct sockaddr_in client;
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int c = sizeof (struct sockaddr_in);
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clientID = accept(socketFD, (struct sockaddr *) &client, (socklen_t*) & c);
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if (clientID < 0) {
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perror("Accept failed in acceptClient");
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exit(-1);
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}
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return clientID;
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}
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int sendDataToServer(char *data, int length) {
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return sendDataToServerForClient(clientID, data, length);
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}
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int sendDataToServerForClient(int client, char *data, int length) {
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if (client >= 0)
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return write(client, (void*)data, length);
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else return 0;
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}
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int receiveDataFromServer(char *data, int size) {
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return receiveDataFromServerFromClient(clientID, data, size);
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}
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int receiveDataFromServerFromClient(int client, char *data, int size) {
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char length = 0;
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if (client > 0) {
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if ((length = recv(client, (void*)data, size, 0)) > 0) {
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data[length] = 0;
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}
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}
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return length;
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}
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int sendImage(Jpg *image)
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{
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int status = 0;
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int lengthSend;
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if (imgMsg != NULL) free((void*) imgMsg);
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imgMsg = (char*) malloc(image->size()+ 4);
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imgMsg[0] = HEADER_STM_IMAGE[0];
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imgMsg[1] = HEADER_STM_IMAGE[1];
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imgMsg[2] = HEADER_STM_IMAGE[2];
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imgMsg[3] = ':';
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memcpy((void*) &imgMsg[4], (const void *) reinterpret_cast<char*> (image->data()), image->size());
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lengthSend=sendDataToServer(imgMsg, image->size() + 4);
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return status;
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}
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