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Andreas Tengicki
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Apr 25, 2020
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// Server side C/C++ program to demonstrate Socket programming | ||
//Source: https://www.geeksforgeeks.org/socket-programming-cc/ | ||
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#include <unistd.h> | ||
#include <stdio.h> | ||
#include <sys/socket.h> | ||
#include <stdlib.h> | ||
#include <netinet/in.h> | ||
#include <string.h> | ||
#define PORT 8080 | ||
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int main(int argc, char const *argv[]) | ||
{ | ||
int server_fd, new_socket, valread; | ||
struct sockaddr_in address; | ||
int opt = 1; | ||
int addrlen = sizeof(address); | ||
char buffer[1024] = {0}; | ||
char hello[] = "Hello from server"; | ||
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// Creating socket file descriptor | ||
if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0) | ||
{ | ||
perror("socket failed"); | ||
exit(EXIT_FAILURE); | ||
} | ||
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// Forcefully attaching socket to the port 8080 | ||
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR | SO_REUSEPORT, | ||
&opt, sizeof(opt))) | ||
{ | ||
perror("setsockopt"); | ||
exit(EXIT_FAILURE); | ||
} | ||
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address.sin_family = AF_INET; | ||
address.sin_addr.s_addr = INADDR_ANY; | ||
address.sin_port = htons( PORT ); | ||
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// Forcefully attaching socket to the port 8080 | ||
if (bind(server_fd, (struct sockaddr *)&address, sizeof(address))<0) | ||
{ | ||
perror("bind failed"); | ||
exit(EXIT_FAILURE); | ||
} | ||
if (listen(server_fd, 3) < 0) | ||
{ | ||
perror("listen"); | ||
exit(EXIT_FAILURE); | ||
} | ||
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if ((new_socket = accept(server_fd, (struct sockaddr *)&address, | ||
(socklen_t*)&addrlen))<0) | ||
{ | ||
perror("accept"); | ||
exit(EXIT_FAILURE); | ||
} | ||
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valread = read( new_socket , buffer, 1024); | ||
printf("%s\n",buffer ); | ||
send(new_socket , hello , strlen(hello) , 0 ); | ||
printf("Hello message sent\n"); | ||
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int main() { | ||
printf("Hallo, Welt!\n"); | ||
return 0; | ||
} |