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// SOCK_Dgram_Mcast.cpp
// $Id$
#define ACE_BUILD_DLL
#include "ace/SOCK_Dgram_Mcast.h"
#include "ace/INET_Addr.h"
#if defined (ACE_LACKS_INLINE_FUNCTIONS)
#include "ace/SOCK_Dgram_Mcast.i"
#endif
ACE_ALLOC_HOOK_DEFINE(ACE_SOCK_Dgram_Mcast)
void
ACE_SOCK_Dgram_Mcast::dump (void) const
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast::dump");
}
// Dummy default constructor...
ACE_SOCK_Dgram_Mcast::ACE_SOCK_Dgram_Mcast (void)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast::ACE_SOCK_Dgram_Mcast");
}
int
ACE_SOCK_Dgram_Mcast::subscribe (const ACE_INET_Addr &mcast_addr,
int reuse_addr,
const ASYS_TCHAR *net_if,
int protocol_family,
int protocol)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast::subscribe");
// Make a local copy of address to use in sends.
this->mcast_addr_.set (mcast_addr);
// Only perform the open() initialization if we haven't been opened
// previously.
if (this->get_handle () == ACE_INVALID_HANDLE)
{
if (ACE_SOCK::open (SOCK_DGRAM, protocol_family,
protocol, reuse_addr) == -1)
return -1;
int one = 1;
if (reuse_addr
&& this->ACE_SOCK::set_option (SOL_SOCKET,
SO_REUSEADDR,
&one,
sizeof one) == -1)
return -1;
#if defined (SO_REUSEPORT)
if (this->ACE_SOCK::set_option (SOL_SOCKET,
SO_REUSEPORT,
&one,
sizeof one) == -1)
return -1;
#endif /* SO_REUSEPORT */
// Create an address to bind the socket to.
ACE_INET_Addr local;
if (local.set (this->mcast_addr_.get_port_number ()) == -1)
return -1;
else if (ACE_SOCK_Dgram::shared_open (local, protocol_family) == -1)
return -1;
}
// Create multicast request.
if (this->make_multicast_address (this->mcast_addr_, net_if) == -1)
return -1;
// Tell network device driver to read datagrams with a
// multicast_address address.
else if (this->ACE_SOCK::set_option (IPPROTO_IP,
IP_ADD_MEMBERSHIP,
&multicast_address_,
sizeof multicast_address_) == -1)
return -1;
return 0;
}
int
ACE_SOCK_Dgram_Mcast::unsubscribe (void)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast::unsubscribe");
return this->ACE_SOCK::set_option (IPPROTO_IP,
IP_DROP_MEMBERSHIP,
&multicast_address_,
sizeof multicast_address_);
}
int
ACE_SOCK_Dgram_Mcast::make_multicast_address (const ACE_INET_Addr &mcast_addr,
const ASYS_TCHAR *net_if)
{
ACE_TRACE ("ACE_SOCK_Dgram_Mcast::make_multicast_address");
if (net_if != 0)
{
#if !defined (ACE_WIN32)
struct ifreq if_address;
ACE_OS::strcpy (if_address.ifr_name, net_if);
if (ACE_OS::ioctl (this->get_handle (), SIOCGIFADDR, &if_address) == -1)
return -1;
struct sockaddr_in *socket_address;
socket_address = (sockaddr_in *) &if_address.ifr_addr;
multicast_address_.imr_interface.s_addr = socket_address->sin_addr.s_addr;
#else
// This port number is not necessary, just convenient
ACE_INET_Addr interface_addr;
if (interface_addr.set (mcast_addr.get_port_number (),
net_if) == -1)
return -1;
multicast_address_.imr_interface.s_addr =
htonl (interface_addr.get_ip_address ());
#endif /* ACE_WIN32 */
}
else
multicast_address_.imr_interface.s_addr = INADDR_ANY;
multicast_address_.imr_multiaddr.s_addr = htonl (mcast_addr.get_ip_address ());
return 0;
}
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