Re: freeing port - winsock

Well

I finnaly find out what happened.
Just check those two links, they explain everything (and google wasn't my friend this time -_-) :
http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/regentry/58811.mspx
http://www.microsoft.com/technet/prodtechnol/windows2000serv/reskit/regentry/58791.mspx


Julien Ghaye a écrit :
Hi everyone,

Actually, I'm coding some kind of a http client.

Here is my problem. When I create and destroy many sockets (one after another) without specifying the local port to bind, It seems that this local port is not free after using the function closesocket().

So, How can I free it ?

Here is a small programm that I code quickly. It's goal is to create a socket, connect to a remote server on port 80, close the socket and to loop on these actions.
It displays the local port in use.
You'll see that after having used the default range 1024-5000, you get a 10048 error (adresse in use)

Any ideas ?

Thanks all,
Julien


///////////////////// CODE ////////////////////


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

#pragma comment(lib, "ws2_32.lib")

using namespace std;

int host(SOCKET s, char* buff, int* length)
{
sockaddr name;
int namelen = sizeof(sockaddr);
if ((getsockname(s,&name,&namelen) == SOCKET_ERROR) ||
(WSAAddressToString(&name,namelen,NULL,buff,(LPDWORD)length) == SOCKET_ERROR))
{
cout << "An error Occurs .... error code : " << WSAGetLastError() << endl;
return -1;
}
return 0;
}


void main()
{
WSADATA WSAData;
SOCKET sock = INVALID_SOCKET;
SOCKADDR_IN sin;
int buff_len = 255;
char *buffer = new char[buff_len];

cout << "Stratup" << endl;
WSAStartup(MAKEWORD(2,0), &WSAData);
bool optVal = true;

while(true)
{
sock = socket(AF_UNSPEC, SOCK_STREAM, IPPROTO_TCP);
sin.sin_addr.s_addr = inet_addr("127.0.0.1");
sin.sin_family = AF_INET;
sin.sin_port = htons(80);
cout << "Connecting " ;
if(connect(sock, (SOCKADDR *)&sin, sizeof(sin)) == SOCKET_ERROR)
{
cout << " ... Error : " << WSAGetLastError() << endl;
break;
}
//setsockopt(sock,SOL_SOCKET,SO_EXCLUSIVEADDRUSE,(char *)&optVal, sizeof(bool));
host (sock, buffer, &buff_len);
cout << "from" << buffer << "\r";
closesocket(sock);
sock = INVALID_SOCKET;
}
cout << "Cleaning up" << endl;
sock = INVALID_SOCKET;
WSACleanup();
cin >> new char;
}


--
Julien Ghaye
University of Liège - Montefiore Institute
.

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