Server

driver-station-server/client.cpp

@@ -0,0 +1,73 @@
+/*
+	Simple udp client
+*/
+#include<stdio.h>
+#include<winsock2.h>
+
+#pragma comment(lib,"ws2_32.lib") //Winsock Library
+
+#define SERVER "127.0.0.1"	//ip address of udp server
+#define BUFLEN 512	//Max length of buffer
+#define PORT 8888	//The port on which to listen for incoming data
+
+int main(void)
+{
+	struct sockaddr_in si_other;
+	int s, slen=sizeof(si_other);
+	char buf[BUFLEN];
+	char message[BUFLEN];
+	WSADATA wsa;
+
+	//Initialise winsock
+	printf("\nInitialising Winsock...");
+	if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
+	{
+		printf("Failed. Error Code : %d",WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	printf("Initialised.\n");
+
+	//create socket
+	if ( (s=socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) == SOCKET_ERROR)
+	{
+		printf("socket() failed with error code : %d" , WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+
+	//setup address structure
+	memset((char *) &si_other, 0, sizeof(si_other));
+	si_other.sin_family = AF_INET;
+	si_other.sin_port = htons(PORT);
+	si_other.sin_addr.S_un.S_addr = inet_addr(SERVER);
+
+	//start communication
+	while(1)
+	{
+		printf("Enter message : ");
+		gets(message);
+
+		//send the message
+		if (sendto(s, message, strlen(message) , 0 , (struct sockaddr *) &si_other, slen) == SOCKET_ERROR)
+		{
+			printf("sendto() failed with error code : %d" , WSAGetLastError());
+			exit(EXIT_FAILURE);
+		}
+
+		//receive a reply and print it
+		//clear the buffer by filling null, it might have previously received data
+		memset(buf,'\0', BUFLEN);
+		//try to receive some data, this is a blocking call
+		if (recvfrom(s, buf, BUFLEN, 0, (struct sockaddr *) &si_other, &slen) == SOCKET_ERROR)
+		{
+			printf("recvfrom() failed with error code : %d" , WSAGetLastError());
+			exit(EXIT_FAILURE);
+		}
+
+		puts(buf);
+	}
+
+	closesocket(s);
+	WSACleanup();
+
+	return 0;
+}

driver-station-server/server.cpp

@@ -0,0 +1,84 @@
+/*
+	Simple UDP Server
+*/
+
+#include<stdio.h>
+#include<winsock2.h>
+
+#pragma comment(lib,"ws2_32.lib") //Winsock Library
+
+#define BUFLEN 512	//Max length of buffer
+#define PORT 8888	//The port on which to listen for incoming data
+
+int main()
+{
+	SOCKET s;
+	struct sockaddr_in server, si_other;
+	int slen , recv_len;
+	char buf[BUFLEN];
+	WSADATA wsa;
+
+	slen = sizeof(si_other) ;
+
+	//Initialise winsock
+	printf("\nInitialising Winsock...");
+	if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
+	{
+		printf("Failed. Error Code : %d",WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	printf("Initialised.\n");
+
+	//Create a socket
+	if((s = socket(AF_INET , SOCK_DGRAM , 0 )) == INVALID_SOCKET)
+	{
+		printf("Could not create socket : %d" , WSAGetLastError());
+	}
+	printf("Socket created.\n");
+
+	//Prepare the sockaddr_in structure
+	server.sin_family = AF_INET;
+	server.sin_addr.s_addr = INADDR_ANY;
+	server.sin_port = htons( PORT );
+
+	//Bind
+	if( bind(s ,(struct sockaddr *)&server , sizeof(server)) == SOCKET_ERROR)
+	{
+		printf("Bind failed with error code : %d" , WSAGetLastError());
+		exit(EXIT_FAILURE);
+	}
+	puts("Bind done");
+
+	//keep listening for data
+	while(1)
+	{
+		printf("Waiting for data...");
+		fflush(stdout);
+
+		//clear the buffer by filling null, it might have previously received data
+		memset(buf,'\0', BUFLEN);
+
+		//try to receive some data, this is a blocking call
+		if ((recv_len = recvfrom(s, buf, BUFLEN, 0, (struct sockaddr *) &si_other, &slen)) == SOCKET_ERROR)
+		{
+			printf("recvfrom() failed with error code : %d" , WSAGetLastError());
+			exit(EXIT_FAILURE);
+		}
+
+		//print details of the client/peer and the data received
+		printf("Received packet from %s:%d\n", inet_ntoa(si_other.sin_addr), ntohs(si_other.sin_port));
+		printf("Data: %s\n" , buf);
+
+		//now reply the client with the same data
+		if (sendto(s, buf, recv_len, 0, (struct sockaddr*) &si_other, slen) == SOCKET_ERROR)
+		{
+			printf("sendto() failed with error code : %d" , WSAGetLastError());
+			exit(EXIT_FAILURE);
+		}
+	}
+
+	closesocket(s);
+	WSACleanup();
+
+	return 0;
+}