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server.c
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server.c
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#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <dirent.h>
#define PORT 8080
//Socket Creation
int CreateSocket(void){
int network_socket;
printf("Creating Socket\n");
network_socket = socket(AF_INET, SOCK_STREAM, 0);
return network_socket;
}
//Bind assigment to the socket
int BindSocket(int network_socket){
int bind_status = -1;
struct sockaddr_in address;
address.sin_family = AF_INET; /* Internet address family --> IPv4 */
address.sin_addr.s_addr = htonl(INADDR_ANY); /* Any incoming interface */
address.sin_port = htons(PORT); /* Local port --> 8080*/
bind_status = bind(network_socket,(struct sockaddr *)&address, sizeof(address));
return bind_status;
}
//-------------------------------------------------------------------------------------------------
//------------------------------------------Main Program-------------------------------------------
//-------------------------------------------------------------------------------------------------
int main(int argc , char *argv[]){
FILE *fp;
int network_socket , sock , clientLen;
struct sockaddr_in server ,client;
char client_message[10]={0};
char cwd[PATH_MAX];
//Get current diretory and concatetate it with the output text file
getcwd(cwd, sizeof(cwd));
strcat(cwd, "/temperature.txt");
//Create socket
network_socket = CreateSocket();
if (network_socket == -1){
printf("Unable to create the socket\n");
return 1;
}
printf("Socket created\n");
//Bind to the socket
if (BindSocket(network_socket) < 0){
perror("Bind Failed:");
return 1;
}
printf("Bind done\n");
//Listen
listen(network_socket , 3);
//Accept and incoming connection
while(1){
printf("Waiting for incoming connections...\n");
clientLen = sizeof(struct sockaddr_in);
//accept connection from an incoming client
sock = accept(network_socket, (struct sockaddr *)&client, (socklen_t*)&clientLen);
if (sock < 0){
perror("accept failed");
return 1;
}
printf("Connection accepted\n");
//Receive a reply from the client
if( recv(sock , client_message , 10 , 0) < 0){
printf("recv failed");
break;
}
fp = fopen(cwd, "a");
fprintf(fp, "CPU temperature = %s ºC\n", client_message);
fclose(fp);
close(sock);
sleep(1);
}
return 0;
}