From c9c6c5527c9aaf459cdf5b8a1e89c0819396bde3 Mon Sep 17 00:00:00 2001
From: Andreas Tengicki <tengicki@autopoll.de>
Date: Sat, 25 Apr 2020 16:26:19 +0200
Subject: [PATCH] erster Server aus dem Beispiel

---
 server.cpp | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 61 insertions(+), 2 deletions(-)

diff --git a/server.cpp b/server.cpp
index f7ffab2..877a8c2 100644
--- a/server.cpp
+++ b/server.cpp
@@ -1,6 +1,65 @@
+// Server side C/C++ program to demonstrate Socket programming
+//Source: https://www.geeksforgeeks.org/socket-programming-cc/
+
+#include <unistd.h>
 #include <stdio.h>
+#include <sys/socket.h>
+#include <stdlib.h>
+#include <netinet/in.h>
+#include <string.h>
+#define PORT 8080
+
+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";
+
+	// Creating socket file descriptor
+	if ((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == 0)
+	{
+		perror("socket failed");
+		exit(EXIT_FAILURE);
+	}
+
+	// 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);
+	}
+
+  address.sin_family = AF_INET;
+	address.sin_addr.s_addr = INADDR_ANY;
+	address.sin_port = htons( PORT );
+
+	// 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);
+	}
+
+  if ((new_socket = accept(server_fd, (struct sockaddr *)&address,
+					(socklen_t*)&addrlen))<0)
+	{
+		perror("accept");
+		exit(EXIT_FAILURE);
+	}
+
+  valread = read( new_socket , buffer, 1024);
+	printf("%s\n",buffer );
+	send(new_socket , hello , strlen(hello) , 0 );
+	printf("Hello message sent\n");
 
-int main() {
-  printf("Hallo, Welt!\n");
   return 0;
 }