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|
// -*- C++ -*-
#include "tao/IIOP_Connection_Handler.h"
#if defined (TAO_HAS_IIOP) && (TAO_HAS_IIOP != 0)
#include "tao/debug.h"
#include "tao/ORB_Core.h"
#include "tao/IIOP_Transport.h"
#include "tao/IIOP_Endpoint.h"
#include "tao/IIOPC.h"
#include "tao/Thread_Lane_Resources.h"
#include "tao/Base_Transport_Property.h"
#include "tao/Protocols_Hooks.h"
#include "tao/Wait_Strategy.h"
#include "ace/os_include/netinet/os_tcp.h"
#include "ace/os_include/os_netdb.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
#ifdef TAO_LOG_CH_REF_COUNTS
ACE_Event_Handler::Reference_Count
TAO_IIOP_Connection_Handler::add_reference (void)
{
Reference_Count rc = TAO_IIOP_SVC_HANDLER::add_reference ();
if (TAO_debug_level > 9)
{
TAO_Transport *tport = this->transport ();
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler[%d]::")
ACE_TEXT("add_reference, up to %d\n"),
tport != 0 ? tport->id () : 0,
rc));
}
return rc;
}
ACE_Event_Handler::Reference_Count
TAO_IIOP_Connection_Handler::remove_reference (void)
{
TAO_Transport *tport = this->transport ();
Reference_Count rc = TAO_IIOP_SVC_HANDLER::remove_reference ();
if (TAO_debug_level > 9)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler[%d]::")
ACE_TEXT("remove_reference, down to %d\n"),
tport != 0 ? tport->id () : 0,
rc));
}
return rc;
}
#endif /*TAO_LOG_CH_REF_COUNTS*/
TAO_IIOP_Connection_Handler::TAO_IIOP_Connection_Handler (ACE_Thread_Manager *t)
: TAO_IIOP_SVC_HANDLER (t, 0 , 0),
TAO_Connection_Handler (0),
dscp_codepoint_ (IPDSFIELD_DSCP_DEFAULT << 2)
{
// This constructor should *never* get called, it is just here to
// make the compiler happy: the default implementation of the
// Creation_Strategy requires a constructor with that signature, we
// don't use that implementation, but some (most?) compilers
// instantiate it anyway.
ACE_ASSERT (0);
}
TAO_IIOP_Connection_Handler::TAO_IIOP_Connection_Handler (
TAO_ORB_Core *orb_core)
: TAO_IIOP_SVC_HANDLER (orb_core->thr_mgr (), 0, 0),
TAO_Connection_Handler (orb_core),
dscp_codepoint_ (IPDSFIELD_DSCP_DEFAULT << 2)
{
TAO_IIOP_Transport* specific_transport = 0;
ACE_NEW (specific_transport,
TAO_IIOP_Transport (this, orb_core));
if (TAO_debug_level > 9)
{
TAO_Transport *tport = static_cast<TAO_Transport *> (specific_transport);
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler[%d]::")
ACE_TEXT("IIOP_Connection_Handler, ")
ACE_TEXT("this=%@\n"),
tport != 0 ? tport->id () : 0,
this));
}
// store this pointer (indirectly increment ref count)
this->transport (specific_transport);
}
TAO_IIOP_Connection_Handler::~TAO_IIOP_Connection_Handler (void)
{
if (TAO_debug_level > 9)
{
TAO_Transport *tport = this->transport ();
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler[%d]::")
ACE_TEXT("~IIOP_Connection_Handler, ")
ACE_TEXT("this=%@, transport=%@\n"),
tport != 0 ? tport->id () : 0,
this,
tport));
}
delete this->transport ();
int const result =
this->release_os_resources ();
if (result == -1 && TAO_debug_level)
{
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::")
ACE_TEXT("~IIOP_Connection_Handler, ")
ACE_TEXT("release_os_resources() failed %m\n")));
}
}
/* Copy hook that copies over the concrete methods from this class
* to the base Connection_Handler class as a part of the specialization
* process. Add all concrete and virtual
* methods implemented in this class within this hook.
*/
//@@ CONNECTION_HANDLER_SPL_COPY_HOOK_START
int
TAO_IIOP_Connection_Handler::open_handler (void *v)
{
return this->open (v);
}
int
TAO_IIOP_Connection_Handler::open (void*)
{
if (this->shared_open() == -1)
return -1;
TAO_IIOP_Protocol_Properties protocol_properties;
// Initialize values from ORB params.
protocol_properties.send_buffer_size_ =
this->orb_core ()->orb_params ()->sock_sndbuf_size ();
protocol_properties.recv_buffer_size_ =
this->orb_core ()->orb_params ()->sock_rcvbuf_size ();
protocol_properties.no_delay_ =
this->orb_core ()->orb_params ()->nodelay ();
protocol_properties.keep_alive_ =
this->orb_core ()->orb_params ()->sock_keepalive ();
protocol_properties.dont_route_ =
this->orb_core ()->orb_params ()->sock_dontroute ();
protocol_properties.hop_limit_ =
this->orb_core ()->orb_params ()->ip_hoplimit ();
TAO_Protocols_Hooks *tph = this->orb_core ()->get_protocols_hooks ();
if (tph != 0)
{
try
{
if (this->transport ()->opened_as () == TAO::TAO_CLIENT_ROLE)
{
tph->client_protocol_properties_at_orb_level (protocol_properties);
}
else
{
tph->server_protocol_properties_at_orb_level (protocol_properties);
}
}
catch (const ::CORBA::Exception&)
{
return -1;
}
}
if (this->set_socket_option (this->peer (),
protocol_properties.send_buffer_size_,
protocol_properties.recv_buffer_size_) == -1)
{
return -1;
}
#if !defined (ACE_LACKS_TCP_NODELAY)
if (this->peer ().set_option (ACE_IPPROTO_TCP,
TCP_NODELAY,
(void *) &protocol_properties.no_delay_,
sizeof (protocol_properties.no_delay_)) == -1)
return -1;
#endif /* ! ACE_LACKS_TCP_NODELAY */
if (protocol_properties.keep_alive_)
{
if (this->peer ().
set_option (SOL_SOCKET,
SO_KEEPALIVE,
(void *) &protocol_properties.keep_alive_,
sizeof (protocol_properties.keep_alive_)) == -1
&& errno != ENOTSUP)
{
return -1;
}
}
#if !defined (ACE_LACKS_SO_DONTROUTE)
if (protocol_properties.dont_route_)
{
if (this->peer ().
set_option (SOL_SOCKET,
SO_DONTROUTE,
(void *) &protocol_properties.dont_route_,
sizeof (protocol_properties.dont_route_)) == -1
&& errno != ENOTSUP)
{
return -1;
}
}
#endif /* ! ACE_LACKS_SO_DONTROUTE */
if (protocol_properties.hop_limit_ >= 0)
{
int result = 0;
#if defined (ACE_HAS_IPV6)
ACE_INET_Addr local_addr;
if (this->peer ().get_local_addr (local_addr) == -1)
{
result = -1;
}
else if (local_addr.get_type () == AF_INET6)
{
#if defined (ACE_WIN32)
DWORD hop_limit =
static_cast<DWORD> (protocol_properties.hop_limit_);
#else
int hop_limit =
static_cast<int> (protocol_properties.hop_limit_);
#endif
result = this->peer ().set_option (
IPPROTO_IPV6,
IPV6_UNICAST_HOPS,
(void *) &hop_limit,
sizeof (hop_limit));
}
else
#endif /* ACE_HAS_IPV6 */
{
#if defined (ACE_WIN32)
DWORD hop_limit =
static_cast<DWORD> (protocol_properties.hop_limit_);
#else
int hop_limit =
static_cast<int> (protocol_properties.hop_limit_);
#endif
result = this->peer ().set_option (
IPPROTO_IP,
IP_TTL,
(void *) &hop_limit,
sizeof (hop_limit));
}
if (result != 0)
{
if (TAO_debug_level)
{
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::open, ")
ACE_TEXT("couldn't set hop limit\n\n")));
}
return -1;
}
}
if (this->transport ()->wait_strategy ()->non_blocking ()
|| this->transport ()->opened_as () == TAO::TAO_SERVER_ROLE)
{
if (this->peer ().enable (ACE_NONBLOCK) == -1)
return -1;
}
// Called by the <Strategy_Acceptor> when the handler is
// completely connected.
ACE_INET_Addr remote_addr;
if (this->peer ().get_remote_addr (remote_addr) == -1)
return -1;
ACE_INET_Addr local_addr;
if (this->peer ().get_local_addr (local_addr) == -1)
return -1;
if (TAO_debug_level > 2)
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::open, ")
ACE_TEXT("The local addr is <%C:%d>\n"),
local_addr.get_host_addr (),
local_addr.get_port_number()));
if (local_addr == remote_addr)
{
if (TAO_debug_level > 0)
{
ACE_TCHAR remote_as_string[MAXHOSTNAMELEN + 16];
ACE_TCHAR local_as_string[MAXHOSTNAMELEN + 16];
(void) remote_addr.addr_to_string (remote_as_string,
sizeof(remote_as_string));
(void) local_addr.addr_to_string (local_as_string,
sizeof(local_as_string));
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT("TAO(%P|%t) - IIOP_Connection_Handler::open, ")
ACE_TEXT("Holy Cow! The remote addr and ")
ACE_TEXT("local addr are identical (%s == %s)\n"),
remote_as_string, local_as_string));
}
return -1;
}
#if defined (ACE_HAS_IPV6) && !defined (ACE_HAS_IPV6_V6ONLY)
// Check if we need to invalidate accepted connections
// from IPv4 mapped IPv6 addresses
if (this->orb_core ()->orb_params ()->connect_ipv6_only () &&
remote_addr.is_ipv4_mapped_ipv6 ())
{
if (TAO_debug_level > 0)
{
ACE_TCHAR remote_as_string[MAXHOSTNAMELEN + 16];
(void) remote_addr.addr_to_string (remote_as_string,
sizeof(remote_as_string));
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::open, ")
ACE_TEXT("invalid connection from IPv4 mapped IPv6 interface <%s>!\n"),
remote_as_string));
}
return -1;
}
#endif /* ACE_HAS_IPV6 && ACE_HAS_IPV6_V6ONLY */
if (TAO_debug_level > 0)
{
ACE_TCHAR client_addr[MAXHOSTNAMELEN + 16];
// Verify that we can resolve the peer hostname.
if (remote_addr.addr_to_string (client_addr, sizeof (client_addr)) == -1)
return -1;
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) - IIOP_Connection_Handler::open, IIOP ")
ACE_TEXT ("connection to peer <%s> on [%d]\n"),
client_addr, this->peer ().get_handle ()));
}
// Set that the transport is now connected, if fails we return -1
// Use C-style cast b/c otherwise we get warnings on lots of
// compilers
if (!this->transport ()->post_open ((size_t) this->get_handle ()))
return -1;
this->state_changed (TAO_LF_Event::LFS_SUCCESS,
this->orb_core ()->leader_follower ());
return 0;
}
int
TAO_IIOP_Connection_Handler::resume_handler (void)
{
return ACE_Event_Handler::ACE_APPLICATION_RESUMES_HANDLER;
}
int
TAO_IIOP_Connection_Handler::close_connection (void)
{
// To maintain maximum compatibility, we only set this socket option
// if the user has provided a linger timeout.
int const linger = this->orb_core()->orb_params()->linger ();
if (linger != -1)
{
struct linger lval;
lval.l_onoff = 1;
#if defined(ACE_HAS_LINGER_MS)
lval.l_linger_ms = linger * 1000;
#else
lval.l_linger = (u_short)linger;
#endif
if (this->peer ().set_option(SOL_SOCKET,
SO_LINGER,
(void*) &lval,
sizeof (lval)) == -1)
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) Unable to set ")
ACE_TEXT ("SO_LINGER on %d\n"),
this->peer ().get_handle ()));
}
}
}
return this->close_connection_eh (this);
}
int
TAO_IIOP_Connection_Handler::handle_input (ACE_HANDLE h)
{
return this->handle_input_eh (h, this);
}
int
TAO_IIOP_Connection_Handler::handle_output (ACE_HANDLE handle)
{
int const result = this->handle_output_eh (handle, this);
if (result == -1)
{
this->close_connection ();
return 0;
}
return result;
}
int
TAO_IIOP_Connection_Handler::handle_timeout (const ACE_Time_Value &,
const void *)
{
// Using this to ensure this instance will be deleted (if necessary)
// only after reset_state(). Without this, when this refcount==1 -
// the call to close() will cause a call to remove_reference() which
// will delete this. At that point this->reset_state() is in no
// man's territory and that causes SEGV on some platforms (Windows!)
TAO_Auto_Reference<TAO_IIOP_Connection_Handler> safeguard (*this);
// NOTE: Perhaps not the best solution, as it feels like the upper
// layers should be responsible for this?
// We don't use this upcall for I/O. This is only used by the
// Connector to indicate that the connection timedout. Therefore,
// we should call close()
int const ret = this->close ();
this->reset_state (TAO_LF_Event::LFS_TIMEOUT);
if (TAO_debug_level > 9)
{
TAOLIB_DEBUG ((LM_DEBUG, "TAO (%P|%t) - TAO_IIOP_Connection_Handler[%d]::"
"handle_timeout reset state to LFS_TIMEOUT\n",
this->transport ()-> id()));
}
return ret;
}
int
TAO_IIOP_Connection_Handler::handle_close (ACE_HANDLE, ACE_Reactor_Mask)
{
return 0;
}
int
TAO_IIOP_Connection_Handler::close (u_long flags)
{
return this->close_handler (flags);
}
int
TAO_IIOP_Connection_Handler::release_os_resources (void)
{
return this->peer ().close ();
}
int
TAO_IIOP_Connection_Handler::add_transport_to_cache (void)
{
ACE_INET_Addr addr;
// Get the peername.
if (this->peer ().get_remote_addr (addr) == -1)
return -1;
// Construct an IIOP_Endpoint object
TAO_IIOP_Endpoint endpoint (
addr,
this->orb_core()->orb_params()->cache_incoming_by_dotted_decimal_address ());
// Construct a property object
TAO_Base_Transport_Property prop (&endpoint);
TAO::Transport_Cache_Manager &cache =
this->orb_core ()->lane_resources ().transport_cache ();
// Idle the transport..
return cache.cache_transport (&prop, this->transport ());
}
int
TAO_IIOP_Connection_Handler::process_listen_point_list (
IIOP::ListenPointList &listen_list)
{
// Get the size of the list
CORBA::ULong len = listen_list.length ();
if (TAO_debug_level > 0 && len == 0)
{
TAOLIB_ERROR ((LM_ERROR,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::")
ACE_TEXT("process_listen_point_list, ")
ACE_TEXT("Received list of size 0, check client config.\n")));
}
// @@ We can only handle a single endpoint for now because the
// transport is recached for each endpoint, loosing older
// information. This means that when more than one listen_point is
// sent, the cache will end up only being associated with the last
// address. This poses a problem at invocation time because the
// default endpoint selector steps through the profiles/endpoints
// sequentially and will try and possibly succeed in connecting to
// one of the earlier endpoints. My assumption is that when this
// method is called, it is before the first attempt to connect to
// any object in the target process, thus the first listen point in
// the list will correspond with the first profile and thus that
// should match the cache.
//
// Probably what needs to be done to make this model work well is to
// allow the transport cache to have multiple keys reference the
// same transport so that rather than recaching, we simply add a
// key.
len = 1;
for (CORBA::ULong i = 0; i < len; ++i)
{
IIOP::ListenPoint listen_point = listen_list[i];
// since the supplied host/port could be unresolvable, the assigning
// constructor of the INET addr should not be as it will emit an error
// if the underlying set fails. An unresolvable address in this case
// is OK, as it will only be used to find an already cached transport.
ACE_INET_Addr addr;
(void)addr.set(listen_point.port, listen_point.host.in ());
if (TAO_debug_level > 0)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::")
ACE_TEXT("process_listen_point_list, ")
ACE_TEXT("Listening port [%d] on [%C]\n"),
listen_point.port,
listen_point.host.in ()));
}
// Construct an IIOP_Endpoint object using the host as provided
// in the listen point list. We must use host in that form because
// that's also how the ORB on the other side will advertise the host
// in an IOR.
TAO_IIOP_Endpoint endpoint (listen_point.host.in (),
listen_point.port, addr);
// Construct a property object
TAO_Base_Transport_Property prop (&endpoint);
// Mark the connection as bidirectional
prop.set_bidir_flag (1);
// The property for this handler has changed. Recache the
// handler with this property
if (this->transport ()->recache_transport (&prop) == -1)
return -1;
// Make the handler idle and ready for use
this->transport ()->make_idle ();
}
return 0;
}
int
TAO_IIOP_Connection_Handler::set_tos (int tos)
{
if (tos != this->dscp_codepoint_)
{
int result = 0;
#if defined (ACE_HAS_IPV6)
ACE_INET_Addr local_addr;
if (this->peer ().get_local_addr (local_addr) == -1)
return -1;
else if (local_addr.get_type () == AF_INET6)
# if !defined (IPV6_TCLASS)
// IPv6 defines option IPV6_TCLASS for specifying traffic class/priority
// but not many implementations yet (very new;-).
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::")
ACE_TEXT("set_dscp_codepoint -> IPV6_TCLASS not supported yet\n")));
}
return 0;
}
# else /* !IPV6_TCLASS */
result = this->peer ().set_option (IPPROTO_IPV6,
IPV6_TCLASS,
(int *) &tos ,
(int) sizeof (tos));
else
# endif /* IPV6_TCLASS */
#endif /* ACE_HAS_IPV6 */
result = this->peer ().set_option (IPPROTO_IP,
IP_TOS,
(int *) &tos ,
(int) sizeof (tos));
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT("TAO (%P|%t) - IIOP_Connection_Handler::")
ACE_TEXT("set_dscp_codepoint -> dscp: %x; result: %d; %C\n"),
tos,
result,
result == -1 ? "try running as superuser" : ""));
}
// On successful setting of TOS field.
if (result == 0)
this->dscp_codepoint_ = tos;
}
return 0;
}
int
TAO_IIOP_Connection_Handler::set_dscp_codepoint (CORBA::Long dscp_codepoint)
{
int tos = IPDSFIELD_DSCP_DEFAULT << 2;
CORBA::Long codepoint = dscp_codepoint;
tos = static_cast<int> (codepoint) << 2;
this->set_tos (tos);
return 0;
}
int
TAO_IIOP_Connection_Handler::set_dscp_codepoint (CORBA::Boolean set_network_priority)
{
int tos = IPDSFIELD_DSCP_DEFAULT << 2;
if (set_network_priority)
{
TAO_Protocols_Hooks *tph = this->orb_core ()->get_protocols_hooks ();
if (tph != 0)
{
CORBA::Long codepoint = tph->get_dscp_codepoint ();
tos = static_cast<int> (codepoint) << 2;
this->set_tos (tos);
}
}
return 0;
}
void
TAO_IIOP_Connection_Handler::abort (void)
{
struct linger lval = { 0, 0 };
lval.l_onoff = 1;
if (this->peer ().set_option(SOL_SOCKET,
SO_LINGER,
(void*) &lval,
sizeof (lval)) == -1)
{
if (TAO_debug_level)
{
TAOLIB_DEBUG ((LM_DEBUG,
ACE_TEXT ("TAO (%P|%t) Unable to set ")
ACE_TEXT ("SO_LINGER on %d\n"),
this->peer ().get_handle ()));
}
}
}
int
TAO_IIOP_Connection_Handler::handle_write_ready (const ACE_Time_Value *timeout)
{
return ACE::handle_write_ready (this->peer ().get_handle (), timeout);
}
//@@ CONNECTION_HANDLER_SPL_COPY_HOOK_END
/*
* End copy hook
*/
TAO_END_VERSIONED_NAMESPACE_DECL
#endif /* TAO_HAS_IIOP && TAO_HAS_IIOP != 0 */
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