PLZ help me to find out the problem

[curiousGUY]

Hi!


actually i try to build a simple UDP client server that sends and receives the messages. there is no error in the code complie time but some run time error such as the broadcast messages are not send and received properly.

someone can help me to find out the problem in the following code.

server and client both are in seperate files and run seperately on the same machine using winxp SP2.
-----------------------------Server code

#include"winsock2.h"
#include<iostream>
#include<conio.h>

using namespace std;

int main()
{
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);

char sendbuff[] = "Broadcast Message";

SOCKET sock;
sock = socket(AF_INET,SOCK_DGRAM,0);

sockaddr_in server_addr;
sockaddr_in client;

int portnum = 9009;
char recvbuff[50];
int recvbufflen = 50;
int len = sizeof(struct sockaddr_in);
int val = 1;

setsockopt(sock,SOL_SOCKET,SO_REUSEADDR,(char*)&val, sizeof(int));
setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char*)&val, sizeof(int));

server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htonl(INADDR_BROADCAST);
server_addr.sin_port = htons(portnum);

bind(sock,(sockaddr*)&server_addr,sizeof(struct sockaddr));



setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char*)&val, sizeof(int));

recvfrom(sock,recvbuff,recvbufflen,0,(sockaddr*)&client,&len);

sendto(sock,sendbuff,strlen(sendbuff)+1,0,(sockaddr*)&client,len);

cout<<"\n\n\t\tReceived data : "<<recvbuff;

cout<<"\n\n\tpress any key to CONT...";
_getch();

closesocket(sock);
WSACleanup();
}
------------------Client code--------------
#include"winsock2.h"
#include<iostream>
#include<conio.h>

using namespace std;

int main()
{
WSADATA wsaData;
WSAStartup(MAKEWORD(2,2), &wsaData);

char sendbuff[] = "Broadcast Message";

SOCKET sock;
sock = socket(AF_INET,SOCK_DGRAM,0);

sockaddr_in server_addr;

int portnum = 9009;
char recvbuff[50];
int recvbufflen = 50;
int len = sizeof(struct sockaddr_in);
char ip[] = "127.0.0.1";

server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = INADDR_ANY;
server_addr.sin_port = htons(portnum);

int val=1;
int sentbytes=0;

if((setsockopt(sock,SOL_SOCKET,SO_BROADCAST,(char*)&val, sizeof(int)))== SOCKET_ERROR)
cout<<"setsockopt() failed";

sentbytes = sendto(sock,sendbuff,strlen(sendbuff)+1,0,(sockaddr*)&server_addr,len);

recvfrom(sock,recvbuff,recvbufflen,0,(sockaddr*)&server_addr,&len);

cout<<"\n\n\tpress any key to CONT..."<<recvbuff;
_getch();

closesocket(sock);
WSACleanup();
}