Android NDK套接字连接问题

Question

Ok, so I'm able to create a listening socket in my Android App using the following code:

bool CSocket::tcplisten(int port, int max, int mode)
{
  if((sockid = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) return false;
  sockaddr_in addr;
  addr.sin_family = AF_INET;
  addr.sin_addr.s_addr = INADDR_ANY;
  addr.sin_port = htons(port);
  if(mode)setsync(1);
  if(bind(sockid, (struct sockaddr*)&addr, sizeof(sockaddr)) == SOCKET_ERROR)
  {
    closesocket(sockid);
    return false;
  }
  if(listen(sockid, max) == SOCKET_ERROR)
  {
    closesocket(sockid);
    return false;
  }
  return true;
}

I am then able to connect to it in the SAME process using the following code:

bool CSocket::tcpconnect(char *address, int port, int mode)
{
  sockaddr_in addr;
  hostent* hostEntry;
  if((sockid = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == SOCKET_ERROR)
        return false;
  if((hostEntry = gethostbyname(address)) == NULL)
  {
    closesocket(sockid);
    return false;
  }
  addr.sin_family = AF_INET;
  addr.sin_addr.s_addr = htonl(INADDR_ANY);
  addr.sin_port = htons((u_short)port);
  if(mode ==2)setsync(1);
  if(connect(sockid, (struct sockaddr*)&addr, sizeof(sockaddr)) == SOCKET_ERROR)
  {
        closesocket(sockid);
        return false;
  }
  if(mode ==1)setsync(1);
  return true;
}

The problem is, I am unable to connect to other machines running a listening socket or on remote machines like google.com. Any ideas why I can't get it to work?

After some tweaking and probing, I found that the error occurs at the line:

if(connect(sockid, (struct sockaddr*)&addr, sizeof(sockaddr)) == SOCKET_ERROR)
{
    closesocket(sockid);
    return false;
}

The errno is 111 ERCONNREFUSED... Please. ANY help would be appreciated. The application has full Internet access set in the permissions.... Any ideas?

I have the same issues with my Linux build compiled with the same code...

Answer 1

You are trying to connect to INADDR_ANY. You want to copy the relevant part of the hostent into addr.sin_addr.s_addr.