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// Name_Handler.cpp
// $Id$
#define ACE_BUILD_SVC_DLL
#include "ace/Containers.h"
#include "ace/Get_Opt.h"
#include "Name_Handler.h"
// Simple macro that does bitwise AND -- useful in table lookup
#define ACE_TABLE_MAP(INDEX, MASK) (INDEX & MASK)
// Simple macro that does bitwise AND and then right shift bits by 3
#define ACE_LIST_MAP(INDEX, MASK) (((unsigned long) (INDEX & MASK)) >> 3)
int
ACE_Name_Acceptor::parse_args (int argc, char *argv[])
{
ACE_TRACE ("ACE_Name_Acceptor::parse_args");
this->service_port_ = ACE_DEFAULT_SERVER_PORT;
ACE_LOG_MSG->open ("Name Service");
ACE_Get_Opt get_opt (argc, argv, "p:", 0);
for (int c; (c = get_opt ()) != -1; )
{
switch (c)
{
case 'p':
this->service_port_ = ACE_OS::atoi (get_opt.optarg);
break;
default:
ACE_ERROR_RETURN ((LM_ERROR,
"%n:\n[-p server-port]\n%a", 1),
-1);
}
}
this->service_addr_.set (this->service_port_);
return 0;
}
int
ACE_Name_Acceptor::init (int argc, char *argv[])
{
ACE_TRACE ("ACE_Name_Acceptor::init");
// Use the options hook to parse the command line arguments and set
// options.
this->parse_args (argc, argv);
// Set the acceptor endpoint into listen mode (use the Singleton
// global Reactor...).
if (this->open (this->service_addr_, ACE_Service_Config::reactor (),
0, 0, 0,
&this->scheduling_strategy_,
"Name Server", "ACE naming service") == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%n: %p on port %d\n",
"acceptor::open failed",
this->service_addr_.get_port_number ()), -1);
// Ignore SIGPIPE so that each <SVC_HANDLER> can handle this on its
// own.
ACE_Sig_Action sig (ACE_SignalHandler (SIG_IGN), SIGPIPE);
ACE_UNUSED_ARG (sig);
ACE_INET_Addr server_addr;
// Figure out what port we're really bound to.
if (this->acceptor ().get_local_addr (server_addr) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "get_local_addr"), -1);
ACE_DEBUG ((LM_DEBUG,
"starting up Name Server at port %d on handle %d\n",
server_addr.get_port_number (),
this->acceptor ().get_handle ()));
return 0;
}
// The following is a "Factory" used by the ACE_Service_Config and
// svc.conf file to dynamically initialize the state of the Naming
// Server.
ACE_SVC_FACTORY_DEFINE (ACE_Name_Acceptor)
// Default constructor.
ACE_Name_Handler::ACE_Name_Handler (ACE_Thread_Manager *tm)
: ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_NULL_SYNCH> (tm)
{
ACE_TRACE ("ACE_Name_Handler::ACE_Name_Handler");
// Set up pointers to member functions for the top-level dispatching
// of client requests.
this->op_table_[ACE_Name_Request::BIND] = &ACE_Name_Handler::bind;
this->op_table_[ACE_Name_Request::REBIND] = &ACE_Name_Handler::rebind;
this->op_table_[ACE_Name_Request::RESOLVE] = &ACE_Name_Handler::resolve;
this->op_table_[ACE_Name_Request::UNBIND] = &ACE_Name_Handler::unbind;
this->op_table_[ACE_Name_Request::LIST_NAMES] = &ACE_Name_Handler::lists;
this->op_table_[ACE_Name_Request::LIST_NAME_ENTRIES] = &ACE_Name_Handler::lists_entries;
// Assign references to simplify subsequent code.
LIST_ENTRY &list_names_ref = this->list_table_[ACE_LIST_MAP (ACE_Name_Request::LIST_NAMES,
ACE_Name_Request::LIST_OP_MASK)];
LIST_ENTRY &list_values_ref = this->list_table_[ACE_LIST_MAP (ACE_Name_Request::LIST_VALUES,
ACE_Name_Request::LIST_OP_MASK)];
LIST_ENTRY &list_types_ref = this->list_table_[ACE_LIST_MAP (ACE_Name_Request::LIST_TYPES,
ACE_Name_Request::LIST_OP_MASK)];
// Set up pointers to member functions for dispatching within the
// LIST_{NAMES,VALUES,TYPES} methods.
list_names_ref.operation_ = &ACE_Naming_Context::list_names;
list_names_ref.request_factory_ = &ACE_Name_Handler::name_request;
list_names_ref.description_ = "request for LIST_NAMES\n";
list_values_ref.operation_ = &ACE_Naming_Context::list_values;
list_values_ref.request_factory_ = &ACE_Name_Handler::value_request;
list_values_ref.description_ = "request for LIST_VALUES\n";
list_types_ref.operation_ = &ACE_Naming_Context::list_types;
list_types_ref.request_factory_ = &ACE_Name_Handler::type_request;
list_types_ref.description_ = "request for LIST_TYPES\n";
}
// Activate this instance of the ACE_Name_Handler (called by the
// ACE_Name_Acceptor).
/* VIRTUAL */ int
ACE_Name_Handler::open (void *)
{
ACE_TRACE ("ACE_Name_Handler::open");
// Call down to our parent to register ourselves with the Reactor.
if (ACE_Svc_Handler<ACE_SOCK_STREAM, ACE_NULL_SYNCH>::open (0) == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "open"), -1);
// Instantiate our associated ACE_Naming_Context
ACE_NEW_RETURN (naming_context_, ACE_Naming_Context (ACE_Naming_Context::NET_LOCAL), -1);
return 0;
}
// Create and send a reply to the client.
/* VIRTUAL */ int
ACE_Name_Handler::send_reply (ACE_UINT32 status, ACE_UINT32 err)
{
ACE_TRACE ("ACE_Name_Handler::send_reply");
void *buf;
this->name_reply_.msg_type (status);
this->name_reply_.errnum (err);
this->name_reply_.init ();
int len = this->name_reply_.encode (buf);
if (len == -1)
return -1;
ssize_t n = this->peer ().send (buf, len);
if (n != len)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n, expected len = %d, actual len = %d",
"send failed", len, n), -1);
else
return 0;
}
/* VIRTUAL */ int
ACE_Name_Handler::send_request (ACE_Name_Request &request)
{
ACE_TRACE ("ACE_Name_Handler::send_request");
void *buffer;
ssize_t length = request.encode (buffer);
if (length == -1)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "encode failed"), -1);
// Transmit request via a blocking send.
if (this->peer ().send_n (buffer, length) != length)
ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "send_n failed"), -1);
return 0;
}
// Give up waiting (e.g., when a timeout occurs or a client shuts down
// unexpectedly).
/* VIRTUAL */ int
ACE_Name_Handler::abandon (void)
{
ACE_TRACE ("ACE_Name_Handler::abandon");
int failure_reason = errno;
return this->send_reply (ACE_Name_Reply::FAILURE, failure_reason);
}
// Enable clients to limit the amount of time they'll wait
/* VIRTUAL */ int
ACE_Name_Handler::handle_timeout (const ACE_Time_Value &, const void *)
{
ACE_TRACE ("ACE_Name_Handler::handle_timeout");
return this->abandon ();
}
// Return the underlying ACE_HANDLE.
/* VIRTUAL */ ACE_HANDLE
ACE_Name_Handler::get_handle (void) const
{
ACE_TRACE ("ACE_Name_Handler::get_handle");
return this->peer ().get_handle ();
}
// Dispatch the appropriate operation to handle the client request.
/* VIRTUAL */ int
ACE_Name_Handler::dispatch (void)
{
ACE_TRACE ("ACE_Name_Handler::dispatch");
// Dispatch the appropriate request.
int index = this->name_request_.msg_type ();
// Invoke the appropriate member function obtained by indexing into
// the op_table_. ACE_TABLE_MAP returns the same index (by bitwise
// AND) for list_names, list_values, and list_types since they are
// all handled by the same method. Similarly, it returns the same
// index for list_name_entries, list_value_entries, and
// list_type_entries.
return (this->*op_table_[ACE_TABLE_MAP (index, ACE_Name_Request::OP_TABLE_MASK)]) ();
}
// Receive, frame, and decode the client's request. Note, this method
// should use non-blocking I/O.
/* VIRTUAL */ int
ACE_Name_Handler::recv_request (void)
{
ACE_TRACE ("ACE_Name_Handler::recv_request");
// Read the first 4 bytes to get the length of the message This
// implementation assumes that the first 4 bytes are the length of
// the message.
ssize_t n = this->peer ().recv ((void *) &this->name_request_, sizeof (ACE_UINT32));
switch (n)
{
case -1:
/* FALLTHROUGH */
ACE_DEBUG ((LM_DEBUG, "****************** recv_request returned -1\n"));
default:
ACE_ERROR ((LM_ERROR, "%p got %d bytes, expected %d bytes\n",
"recv failed", n, sizeof (ACE_UINT32)));
/* FALLTHROUGH */
case 0:
// We've shutdown unexpectedly, let's abandon the connection.
this->abandon ();
return -1;
/* NOTREACHED */
case sizeof (ACE_UINT32):
{
// Transform the length into host byte order.
ssize_t length = ntohl (this->name_request_.length ());
// Do a sanity check on the length of the message.
if (length > (ssize_t) sizeof this->name_request_)
{
ACE_ERROR ((LM_ERROR, "length %d too long\n", length));
return this->abandon ();
}
// Receive the rest of the request message.
// @@ beware of blocking read!!!.
n = this->peer ().recv ((void *) (((char *) &this->name_request_)
+ sizeof (ACE_UINT32)),
length - sizeof (ACE_UINT32));
// Subtract off the size of the part we skipped over...
if (n != (length - (ssize_t) sizeof (ACE_UINT32)))
{
ACE_ERROR ((LM_ERROR, "%p expected %d, got %d\n",
"invalid length", length, n));
return this->abandon ();
}
// Decode the request into host byte order.
if (this->name_request_.decode () == -1)
{
ACE_ERROR ((LM_ERROR, "%p\n", "decode failed"));
return this->abandon ();
}
}
}
return 0;
}
// Callback method invoked by the ACE_Reactor when events arrive from
// the client.
/* VIRTUAL */ int
ACE_Name_Handler::handle_input (ACE_HANDLE)
{
ACE_TRACE ("ACE_Name_Handler::handle_input");
if (this->recv_request () == -1)
return -1;
else
return this->dispatch ();
}
int
ACE_Name_Handler::bind (void)
{
ACE_TRACE ("ACE_Name_Handler::bind");
return this->shared_bind (0);
}
int
ACE_Name_Handler::rebind (void)
{
ACE_TRACE ("ACE_Name_Handler::rebind");
int result = this->shared_bind (1);
return result == 1 ? 0 : result;
}
int
ACE_Name_Handler::shared_bind (int rebind)
{
ACE_TRACE ("ACE_Name_Handler::shared_bind");
ACE_WString a_name (this->name_request_.name (),
this->name_request_.name_len () / sizeof (ACE_USHORT16));
ACE_WString a_value (this->name_request_.value (),
this->name_request_.value_len () / sizeof (ACE_USHORT16));
int result;
if (rebind == 0)
{
ACE_DEBUG ((LM_DEBUG, "request for BIND \n"));
result = this->naming_context_->bind (a_name, a_value,
this->name_request_.type ());
}
else
{
ACE_DEBUG ((LM_DEBUG, "request for REBIND \n"));
result = this->naming_context_->rebind (a_name, a_value,
this->name_request_.type ());
if (result == 1)
result = 0;
}
if (result == 0)
return this->send_reply (ACE_Name_Reply::SUCCESS);
else return this->send_reply (ACE_Name_Reply::FAILURE);
}
int
ACE_Name_Handler::resolve (void)
{
ACE_TRACE ("ACE_Name_Handler::resolve");
ACE_DEBUG ((LM_DEBUG, "request for RESOLVE \n"));
ACE_WString a_name (this->name_request_.name (),
this->name_request_.name_len () / sizeof (ACE_USHORT16));
// The following will deliver our reply back to client we
// pre-suppose success (indicated by type RESOLVE).
ACE_WString avalue;
char *atype;
if (this->naming_context_->resolve (a_name, avalue, atype) == 0)
{
ACE_Name_Request nrq (ACE_Name_Request::RESOLVE,
NULL, 0,
avalue.rep (),
avalue.length () * sizeof (ACE_USHORT16),
atype, ACE_OS::strlen (atype));
return this->send_request (nrq);
}
ACE_Name_Request nrq (ACE_Name_Request::BIND, NULL, 0, NULL, 0, NULL, 0);
this->send_request (nrq);
return 0;
}
int
ACE_Name_Handler::unbind (void)
{
ACE_TRACE ("ACE_Name_Handler::unbind");
ACE_DEBUG ((LM_DEBUG, "request for UNBIND \n"));
ACE_WString a_name (this->name_request_.name (),
this->name_request_.name_len () / sizeof (ACE_USHORT16));
if (this->naming_context_->unbind (a_name) == 0)
return this->send_reply (ACE_Name_Reply::SUCCESS);
else return this->send_reply (ACE_Name_Reply::FAILURE);
}
ACE_Name_Request
ACE_Name_Handler::name_request (ACE_WString *one_name)
{
ACE_TRACE ("ACE_Name_Handler::name_request");
return ACE_Name_Request (ACE_Name_Request::LIST_NAMES,
one_name->rep (),
one_name->length () * sizeof (ACE_USHORT16),
NULL, 0,
NULL, 0);
}
ACE_Name_Request
ACE_Name_Handler::value_request (ACE_WString *one_value)
{
ACE_TRACE ("ACE_Name_Handler::value_request");
return ACE_Name_Request (ACE_Name_Request::LIST_VALUES,
NULL, 0,
one_value->rep (),
one_value->length () * sizeof (ACE_USHORT16),
NULL, 0);
}
ACE_Name_Request
ACE_Name_Handler::type_request (ACE_WString *one_type)
{
ACE_TRACE ("ACE_Name_Handler::type_request");
return ACE_Name_Request (ACE_Name_Request::LIST_TYPES,
NULL, 0,
NULL, 0,
one_type->char_rep (),
one_type->length ());
}
int
ACE_Name_Handler::lists (void)
{
ACE_TRACE ("ACE_Name_Handler::lists");
ACE_PWSTRING_SET set;
ACE_WString pattern (this->name_request_.name (),
this->name_request_.name_len () / sizeof (ACE_USHORT16));
// Get the index into the list table
int index = ACE_LIST_MAP (this->name_request_.msg_type (),
ACE_Name_Request::LIST_OP_MASK);
// Print the message type
ACE_DEBUG ((LM_DEBUG, list_table_[index].description_));
// Call the appropriate method
if ((this->naming_context_->*list_table_[index].operation_) (set, pattern) != 0)
{
// None found so send blank request back
ACE_Name_Request end_rq (ACE_Name_Request::MAX_ENUM, NULL, 0, NULL, 0, NULL, 0);
if (this->send_request (end_rq) == -1)
return -1;
}
else
{
ACE_WString *one_entry = 0;
for (ACE_Unbounded_Set_Iterator<ACE_WString> set_iterator (set);
set_iterator.next (one_entry) !=0;
set_iterator.advance())
{
ACE_Name_Request nrq ((this->*list_table_[index].request_factory_) (one_entry));
// Create a request by calling the appropriate method obtained
// by accessing into the table. Then send the request across.
if (this->send_request (nrq) == -1)
return -1;
}
// Send last message indicator.
ACE_Name_Request nrq (ACE_Name_Request::MAX_ENUM,
NULL, 0,
NULL, 0,
NULL, 0);
return this->send_request (nrq);
}
return 0;
}
int
ACE_Name_Handler::lists_entries (void)
{
ACE_TRACE ("ACE_Name_Handler::lists_entries");
ACE_BINDING_SET set;
ACE_WString pattern (this->name_request_.name (),
this->name_request_.name_len () / sizeof (ACE_USHORT16));
int (ACE_Naming_Context::*ptmf) (ACE_BINDING_SET &, const ACE_WString &);
switch (this->name_request_.msg_type ())
{
case ACE_Name_Request::LIST_NAME_ENTRIES:
ACE_DEBUG ((LM_DEBUG, "request for LIST_NAME_ENTRIES \n"));
ptmf = &ACE_Naming_Context::list_name_entries;
break;
case ACE_Name_Request::LIST_VALUE_ENTRIES:
ACE_DEBUG ((LM_DEBUG, "request for LIST_VALUE_ENTRIES \n"));
ptmf = &ACE_Naming_Context::list_value_entries;
break;
case ACE_Name_Request::LIST_TYPE_ENTRIES:
ACE_DEBUG ((LM_DEBUG, "request for LIST_TYPE_ENTRIES \n"));
ptmf = &ACE_Naming_Context::list_type_entries;
break;
default:
return -1;
}
if ((this->naming_context_->*ptmf) (set, pattern) != 0)
{
// None found so send blank request back.
ACE_Name_Request end_rq (ACE_Name_Request::MAX_ENUM, NULL, 0, NULL, 0, NULL, 0);
if (this->send_request (end_rq) == -1)
return -1;
}
else
{
ACE_Name_Binding *one_entry = 0;
for (ACE_Unbounded_Set_Iterator<ACE_Name_Binding> set_iterator (set);
set_iterator.next (one_entry) !=0;
set_iterator.advance())
{
ACE_Name_Request mynrq (this->name_request_.msg_type (),
one_entry->name_.rep (),
one_entry->name_.length () * sizeof (ACE_USHORT16),
one_entry->value_.rep (),
one_entry->value_.length () * sizeof (ACE_USHORT16),
one_entry->type_,
ACE_OS::strlen (one_entry->type_));
if (this->send_request (mynrq) == -1)
return -1;
}
// send last message indicator
ACE_Name_Request nrq (ACE_Name_Request::MAX_ENUM, NULL, 0, NULL, 0, NULL, 0);
if (this->send_request (nrq) == -1)
return -1;
}
return 0;
}
ACE_Name_Handler::~ACE_Name_Handler (void)
{
ACE_TRACE ("ACE_Name_Handler::~ACE_Name_Handler");
ACE_DEBUG ((LM_DEBUG, "closing down Handle %d\n",
this->get_handle ()));
// Delete associated Naming Context.
delete this->naming_context_;
}
#if defined (ACE_TEMPLATES_REQUIRE_SPECIALIZATION)
template class ACE_Accept_Strategy<ACE_Name_Handler, ACE_SOCK_ACCEPTOR>;
template class ACE_Acceptor<ACE_Name_Handler, ACE_SOCK_ACCEPTOR>;
template class ACE_Concurrency_Strategy<ACE_Name_Handler>;
template class ACE_Creation_Strategy<ACE_Name_Handler>;
template class ACE_Schedule_All_Reactive_Strategy<ACE_Name_Handler>;
template class ACE_Scheduling_Strategy<ACE_Name_Handler>;
template class ACE_Strategy_Acceptor<ACE_Name_Handler, ACE_SOCK_ACCEPTOR>;
#endif /* ACE_TEMPLATES_REQUIRE_SPECIALIZATION */
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