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#1
May 27th, 2007, 09:32 AM
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Winsock Recv Problems
Okay, I'm stuck on how fix the bug I currently have with my recv.
The code I have is: Code:
void sTheGame::RecieveData() {
for (std::vector<sClient*>::iterator it = PlayerList.begin(); it != PlayerList.end(); ++it) {
sClient *Client = (*it);
if (FD_ISSET(Client->Socket, &Client->SocketData)) {
char buffer[256];
Client->AddressLen = recv(Client->Socket, buffer, 256, 0);
if (Client->AddressLen == 0) {
// Data Fail, Disconnect Client
}
else if (Client->AddressLen > 0) {
sOutput(buffer);
}
}
}
}
Code:
class sClient {
public:
eConnectionState ConnectionState; // TODO: Enum
char *PlayerName;
int IncorrectPassword;
int Room;
SOCKET Socket;
sockaddr_in Address;
int AddressLen;
fd_set SocketData;
sClient();
~sClient();
void Init();
// int Get_Socket() { return s; }
bool Connected;
bool IsPlaying;
};
sOutput is a class function that does: printf("%s\n", buffer); As you can see from the screen dump, I get a load of jibberish, how do I correct this?
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#2
May 27th, 2007, 10:18 AM
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> As you can see from the screen dump, I get a load of jibberish, how do I correct this?
By storing a \0 in the string before you print it. recv() doesn't add this for you. Code:
char buffer[256];
Client->AddressLen = recv(Client->Socket, buffer, sizeof(buffer)-1, 0);
if (Client->AddressLen == 0) {
// Data Fail, Disconnect Client
}
else if (Client->AddressLen > 0) {
buffer[Client->AddressLen] = '\0';
sOutput(buffer);
}
The -1 in the size allows room to append a \0 even if recv() fills the buffer.
__________________
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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