myvtm/Framework/libtoolkit/win/bus_daemon.c

#include "precompile.h"
#include "ioqueue.h"
#include "bus.h"
#include "bus_internal.h"
#include "url.h"
#include "refcnt.h"
#include "list.h"
#include "iobuffer.h"
#include "array.h"
#include "dbgutil.h"
#include <time.h>

#include <winpr/synch.h>
#include <winpr/interlocked.h>
#include <winpr/string.h>
#include <winpr/sysinfo.h>
#include <winpr/thread.h>
#include <winpr/winsock.h>

#define TAG TOOLKIT_TAG("bus_deamon")

#define MAX_THREADS					            32
#define DEFAULT_ACCEPT_OP_COUNT		5
#define MSG_REMOVE_REGISTAR			    1

typedef struct endpt_session_t  endpt_session_t;
typedef struct daemon_accetpor_t daemon_accetpor_t;

struct endpt_session_t 
{
	DECLARE_REF_COUNT_MEMBER(ref_cnt);
	int epid;
	int registered;	
	union {
		ioqueue_tcpsock_t tcp;
		ioqueue_file_t pipe;
	};
	CRITICAL_SECTION lock;
	time_t start_time;
	int err;
	int rx_pending_pkt_len;
	int type;
	int tx_pending;
	struct list_head entry;
	iobuffer_queue_t *tx_iobuf_queue;
	ioqueue_overlapped_t rx_overlapped;
	ioqueue_overlapped_t tx_overlapped;
	iobuffer_t *rx_pending_buf;
	iobuffer_t *tx_pending_buf;
	bus_daemon_t *daemon;
	daemon_accetpor_t *acceptor;
};

struct daemon_accetpor_t 
{
	DECLARE_REF_COUNT_MEMBER(ref_cnt);
	union {
		ioqueue_acceptor_t tcp_acceptor;
		ioqueue_pipe_acceptor_t pipe_acceptor;
	};
	int type;
	array_header_t *arr_ov;
	bus_daemon_t *daemon;
};

struct bus_daemon_t
{
	ioqueue_t *ioq;
	volatile LONG lstop;
	CRITICAL_SECTION lock;
	int nthread;
	array_header_t *arr_uri;
	array_header_t *arr_acceptor;
	array_header_t *arr_thread;
	struct list_head registered_session_list;
	struct list_head unregistered_session_list;
};

DECLARE_REF_COUNT_STATIC(endpt_session, endpt_session_t)
DECLARE_REF_COUNT_STATIC(daemon_accetpor, daemon_accetpor_t)

static unsigned int __stdcall thread_proc(void *param)
{
	bus_daemon_t *daemon = (bus_daemon_t*)param;

	SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);

	while (!daemon->lstop) {
		ioqueue_poll(daemon->ioq, 10);
	}

	return 0;
}

static int start_accept(daemon_accetpor_t *acceptor, int idx);
static int queue_ans_pkt(endpt_session_t *session, int rc);
static int start_send_pkt(endpt_session_t *session, iobuffer_t **pkt);
static int session_start_recv_hdr(endpt_session_t *session);
static int queue_sys_pkt(endpt_session_t *session, int epid, int state);

static void daemon_lock(bus_daemon_t *daemon)
{
	EnterCriticalSection(&daemon->lock);
}

static void daemon_unlock(bus_daemon_t *daemon)
{
	LeaveCriticalSection(&daemon->lock);
}

static void session_lock(endpt_session_t *session)
{
	EnterCriticalSection(&session->lock);
}

static void session_unlock(endpt_session_t *session)
{
	LeaveCriticalSection(&session->lock);
}

static void add_unregistered_list(endpt_session_t *session)
{
	bus_daemon_t *daemon = session->daemon;
	daemon_lock(daemon);
	list_add_tail(&session->entry, &daemon->unregistered_session_list);
	daemon_unlock(daemon);
}

static void remove_session_list(endpt_session_t *session)
{
	bus_daemon_t *daemon = session->daemon;
	daemon_lock(daemon);
	list_del(&session->entry);
	if (session->epid != BUS_INVALID_EPID) {
		endpt_session_t *pos, *n;
		list_for_each_entry_safe(pos, n, &daemon->registered_session_list, endpt_session_t, entry) {
			queue_sys_pkt(pos, session->epid, BUS_STATE_OFF);
		}
	}
	daemon_unlock(daemon);
}

static void move_to_registered_session(endpt_session_t *session)
{
	bus_daemon_t *daemon = session->daemon;
	daemon_lock(daemon);
	{
		endpt_session_t *pos, *n;
		list_for_each_entry_safe(pos, n, &daemon->registered_session_list, endpt_session_t, entry) {
			queue_sys_pkt(pos, session->epid, BUS_STATE_ON);
		}
	}
	list_move_tail(&session->entry, &daemon->registered_session_list);
	daemon_unlock(daemon);
}

static void move_to_unregistered_session(endpt_session_t *session)
{
	bus_daemon_t *daemon = session->daemon;
	daemon_lock(daemon);
	list_move_tail(&session->entry, &daemon->unregistered_session_list);
	daemon_unlock(daemon);
}

static endpt_session_t* create_session(daemon_accetpor_t *acceptor, int type, int fd)
{
	int rc;
	endpt_session_t *session;

	session = ZALLOC_T(endpt_session_t);

	if (type == TYPE_PIPE) {
		rc = ioqueue_pipe_acceptor_create_client(&acceptor->pipe_acceptor, (HANDLE)fd, &session->pipe);
		if (rc < 0)
			goto on_error;
	} else if (type == TYPE_TCP) {
		rc = ioqueue_acceptor_create_client(&acceptor->tcp_acceptor, fd, &session->tcp);
		if (rc < 0)
			goto on_error;
	}

	session->epid = BUS_INVALID_EPID;
	session->start_time = time(NULL);
	session->daemon = acceptor->daemon;
	session->acceptor = acceptor;
	session->type = type;
	REF_COUNT_INIT(&session->ref_cnt);
	InitializeCriticalSection(&session->lock);
	session->tx_iobuf_queue = iobuffer_queue_create();

	return session;

on_error:
	free(session);
	return NULL;
}

static void destroy_session(endpt_session_t *session)
{

	while (iobuffer_queue_count(session->tx_iobuf_queue) > 0) {
		iobuffer_t *iobuf = iobuffer_queue_deque(session->tx_iobuf_queue);
		endpt_session_t *ts = (endpt_session_t*)iobuffer_get_user_data(iobuf);
		if (ts) {
			queue_ans_pkt(ts, BUS_E_NETBROKEN);
			endpt_session_dec_ref(ts);
		}
		iobuffer_destroy(iobuf);
	}
	iobuffer_queue_destroy(session->tx_iobuf_queue);

	DeleteCriticalSection(&session->lock);

	if (session->type == TYPE_PIPE) {
		ioqueue_file_destroy(&session->pipe);
	} else if (session->type == TYPE_TCP) {
		ioqueue_tcpsock_destroy(&session->tcp);
	} else {
		TOOLKIT_ASSERT(0);
	}

	free(session);
}

IMPLEMENT_REF_COUNT_MT_STATIC(endpt_session, endpt_session_t, ref_cnt, destroy_session)

static endpt_session_t *find_session(bus_daemon_t *daemon, int epid)
{
	endpt_session_t *session = NULL, *pos;

	daemon_lock(daemon);
	list_for_each_entry(pos, &daemon->registered_session_list, endpt_session_t, entry) {
		if (pos->epid == epid) {
			endpt_session_inc_ref(pos);
			session = pos;
			break;
		}
	}
	daemon_unlock(daemon);

	return session;
}

static void on_send_pkt(endpt_session_t *session, int err)
{
	iobuffer_t *pkt;

	session_lock(session);
	pkt = session->tx_pending_buf;	
	session->tx_pending_buf = NULL;
	session->tx_pending = 0;	
	session_unlock(session);

	if (pkt) {
		if (iobuffer_get_user_data(pkt)) {
			endpt_session_t *ts = (endpt_session_t*)iobuffer_get_user_data(pkt);
			queue_ans_pkt(ts, err ? BUS_E_NETBROKEN : BUS_E_OK);
			endpt_session_dec_ref(ts);		
		}
		iobuffer_destroy(pkt);
		pkt = NULL;
	}

	if (!err) {
		int rc = 0;

		session_lock(session);
		if (!session->tx_pending) {
			if (iobuffer_queue_count(session->tx_iobuf_queue)) {
				iobuffer_t *tpkt = iobuffer_queue_deque(session->tx_iobuf_queue);
				session->tx_pending = 1;
				rc = start_send_pkt(session, &tpkt);
				if (rc < 0) {
					session->tx_pending = 0;
				}
				if (tpkt) {
					pkt = tpkt;
				}
			}
		}
		session_unlock(session);

		if (rc < 0) {
			if (InterlockedCompareExchange((LONG*)&session->err, rc, 0) == 0) {
				remove_session_list(session);
				endpt_session_dec_ref(session);
			}
		}

		if (pkt) {
			if (iobuffer_get_user_data(pkt)) {
				endpt_session_t *ts = (endpt_session_t*)iobuffer_get_user_data(pkt);
				queue_ans_pkt(ts, err ? BUS_E_NETBROKEN : BUS_E_OK);
				endpt_session_dec_ref(ts);		
			}
			iobuffer_destroy(pkt);
			pkt = NULL;
		}

	} else {
		session_lock(session);
		while (iobuffer_queue_count(session->tx_iobuf_queue) > 0) {
			iobuffer_t *iobuf = iobuffer_queue_deque(session->tx_iobuf_queue);
			endpt_session_t *ts = (endpt_session_t*)iobuffer_get_user_data(iobuf);
			if (ts) {
				session_unlock(session);
				queue_ans_pkt(ts, BUS_E_NETBROKEN);
				session_lock(session);
				endpt_session_dec_ref(ts);
			}
			iobuffer_destroy(iobuf);
		}
		session_unlock(session);
	}

	endpt_session_dec_ref(session);
}

static void on_pipe_send_pkt(ioqueue_file_t* file, 
							 ioqueue_overlapped_t *overlapped,
							 void *buf,
							 unsigned int transfer_bytes, 
							 void *user_data,
							 int err)
{
	on_send_pkt((endpt_session_t*)user_data, err);
}
static void on_tcp_send_pkt(ioqueue_tcpsock_t* tcpsock, 
							ioqueue_overlapped_t *overlapped,
							void *buf,
							unsigned int transfer_bytes, 
							void *user_data,
							int err)
{
	on_send_pkt((endpt_session_t*)user_data, err);
}

static int start_send_pkt(endpt_session_t *session, iobuffer_t **pkt)
{
	int rc = -1;
	int v;

	if (session->err < 0)
		return rc;

	v = iobuffer_get_length(*pkt);
	iobuffer_write_head(*pkt, IOBUF_T_I4, &v, 0);

	endpt_session_inc_ref(session);

	session->tx_pending_buf = *pkt;
	*pkt = NULL;

	if (session->type == TYPE_PIPE) {
		rc = ioqueue_file_async_writen(&session->pipe, 
			&session->tx_overlapped, 
			iobuffer_data(session->tx_pending_buf, 0), 
			iobuffer_get_length(session->tx_pending_buf), 
			&on_pipe_send_pkt, session);
	} else if (session->type == TYPE_TCP) {
		rc = ioqueue_tcpsock_async_sendn(&session->tcp,
			&session->tx_overlapped,
			iobuffer_data(session->tx_pending_buf, 0), 
			iobuffer_get_length(session->tx_pending_buf), 
			&on_tcp_send_pkt, session);
	} else {
		TOOLKIT_ASSERT(0);
	}

	if (rc < 0) {
		*pkt = session->tx_pending_buf;
		endpt_session_dec_ref(session);
	}

	return rc;
}

static int queue_tx_pkt(endpt_session_t *session, iobuffer_t **pkt)
{
	int rc = -1;

	session_lock(session);

	if (session->tx_pending) {
		iobuffer_queue_enqueue(session->tx_iobuf_queue, *pkt);
		*pkt = NULL;
		rc = 0;
	} else {
		session->tx_pending = 1;
		rc = start_send_pkt(session, pkt);
	}

	session_unlock(session);

	if (rc < 0) {
		if (InterlockedCompareExchange((LONG*)&session->err, rc, 0) == 0) {
			ioqueue_post_message(session->daemon->ioq, MSG_REMOVE_REGISTAR, (int)session, 0);
		}
	}

	return rc;
}

static iobuffer_t *make_ans_pkt(int rc)
{
	int v;
	iobuffer_t *pkt = iobuffer_create(-1, -1);
	v = BUS_TYPE_ERROR;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	v = rc;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	return pkt;
}

static int queue_ans_pkt(endpt_session_t *session, int rc)
{
	iobuffer_t *pkt = make_ans_pkt(rc);
	int err = queue_tx_pkt(session, &pkt);
	if (pkt) {
		iobuffer_destroy(pkt);
	}
	return err;
}

static iobuffer_t *make_ans_state_pkt(bus_daemon_t *daemon, int epid)
{
	int v;
	endpt_session_t *ts;
	iobuffer_t *pkt;
	int state;

	ts = find_session(daemon, epid);
	if (!ts) {
		state = BUS_STATE_OFF;
	} else {
		state = BUS_STATE_ON;
		endpt_session_dec_ref(ts);
		ts = NULL;
	}
	
	pkt = iobuffer_create(-1, -1);
	v = BUS_TYPE_ENDPT_GET_STATE;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	v = epid;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	v = state;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	
	return pkt;
}

static iobuffer_t *make_sys_pkt(int epid, int state)
{
	int v;
	iobuffer_t *pkt = iobuffer_create(-1, -1);
	v = BUS_TYPE_SYSTEM;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	v = epid;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	v = state;
	iobuffer_write(pkt, IOBUF_T_I4, &v, 0);
	return pkt;
}

static int queue_sys_pkt(endpt_session_t *session, int epid, int state)
{
	iobuffer_t *pkt = make_sys_pkt(epid, state);
	int err = queue_tx_pkt(session, &pkt);
	if (pkt) {
		iobuffer_destroy(pkt);
	}
	return err;
}

static int on_process_pkt(endpt_session_t *session, iobuffer_t **ppkt)
{
	bus_daemon_t *daemon = session->daemon;
	iobuffer_t *pkt = *ppkt;
	int type;
	int read_state;
	int rc = -1;

	read_state = iobuffer_get_read_state(pkt);

	iobuffer_read(pkt, IOBUF_T_I4, &type, 0);

	if (session->registered) {
		if (type == BUS_TYPE_ENDPT_UNREGISTER) {
			move_to_unregistered_session(session);
			session->registered = 0;
			queue_ans_pkt(session, BUS_E_OK);
			rc = -1;
		} else if (type == BUS_TYPE_ENDPT_GET_STATE) {
			int epid;
			iobuffer_t *ans_pkt;
			iobuffer_read(pkt, IOBUF_T_I4, &epid, 0);
			ans_pkt = make_ans_state_pkt(session->daemon, epid);
			rc = queue_tx_pkt(session, &ans_pkt);
			if (ans_pkt)
				iobuffer_dec_ref(ans_pkt);
		} else if (type == BUS_TYPE_PACKET) {
			int from_epid;
			int to_epid;
			int user_type;
			iobuffer_read(pkt, IOBUF_T_I4, &user_type, 0);
			iobuffer_read(pkt, IOBUF_T_I4, &from_epid, 0);
			iobuffer_read(pkt, IOBUF_T_I4, &to_epid, 0);
			iobuffer_restore_read_state(pkt, read_state);
			if (to_epid == session->epid) {
				endpt_session_inc_ref(session);
				iobuffer_set_user_data(pkt, session);
				rc = queue_tx_pkt(session, ppkt);
				if (rc < 0) {
					endpt_session_dec_ref(session);
					iobuffer_set_user_data(pkt, NULL);
				}
			} else {
				endpt_session_t *ts = find_session(session->daemon, to_epid);
				if (!ts) {
					rc = queue_ans_pkt(session, BUS_E_NOTFOUND);
				} else {
					if (ts->err) {
						rc = queue_ans_pkt(session, BUS_E_NETBROKEN);
					} else {
						endpt_session_inc_ref(session);
						iobuffer_set_user_data(pkt, session);
						rc = queue_tx_pkt(ts, ppkt);
						if (rc < 0) {
							endpt_session_dec_ref(session);
							iobuffer_set_user_data(pkt, NULL);
							rc = queue_ans_pkt(session, BUS_E_NETBROKEN);
						}
					}
					endpt_session_dec_ref(ts); // find session
				}
			}
		} else if (type == BUS_TYPE_EVENT) {
			int epid;
			int user_type;
			iobuffer_read(pkt, IOBUF_T_I4, &user_type, 0);
			iobuffer_read(pkt, IOBUF_T_I4, &epid, 0);
			iobuffer_restore_read_state(pkt, read_state);
			daemon_lock(session->daemon);
			{
				endpt_session_t *pos, *n;
				list_for_each_entry_safe(pos, n, &daemon->registered_session_list, endpt_session_t, entry) {
					if (pos != session) {
						iobuffer_t *tbuf = iobuffer_clone(pkt);
						queue_tx_pkt(pos, &tbuf);
						if (tbuf)
							iobuffer_destroy(tbuf);
					}
				}
			}
			daemon_unlock(session->daemon);
			rc = 0;
		} else if (type == BUS_TYPE_INFO) {
			int from_epid;
			int to_epid;
			int user_type;
			iobuffer_read(pkt, IOBUF_T_I4, &user_type, 0);
			iobuffer_read(pkt, IOBUF_T_I4, &from_epid, 0);
			iobuffer_read(pkt, IOBUF_T_I4, &to_epid, 0);
			iobuffer_restore_read_state(pkt, read_state);
			if (to_epid == session->epid) {
				queue_tx_pkt(session, ppkt);
			} else {
				endpt_session_t *ts = find_session(session->daemon, to_epid);
				if (ts) {
					if (!ts->err) {
						queue_tx_pkt(ts, ppkt);
					}
					endpt_session_dec_ref(ts); // find session
				}
			}
			rc = 0;
		}
	} else {
		if (type == BUS_TYPE_ENDPT_REGISTER) {
			int epid;
			endpt_session_t *ts;
			iobuffer_read(pkt, IOBUF_T_I4, &epid, 0);
			ts = find_session(session->daemon, epid);
			if (!ts) {
				session->registered = 1;
				session->epid = epid;
				rc = queue_ans_pkt(session, BUS_E_OK);
				if (rc == 0) {
					move_to_registered_session(session);
				}
			} else {
				endpt_session_dec_ref(ts);
			}
		}
	}

	if (*ppkt)
		iobuffer_restore_read_state(pkt, read_state);

	return rc;
}

static void on_recv_body(endpt_session_t *session, unsigned int transfer_bytes, int err)
{
	int rc = -1;

	if (!err) {
		iobuffer_t *pkt = session->rx_pending_buf;
		session->rx_pending_buf = NULL;
		iobuffer_push_count(pkt, transfer_bytes);
		rc = on_process_pkt(session, &pkt);
		if (rc == 0) {
			rc = session_start_recv_hdr(session);
		}
		if (pkt)
			iobuffer_dec_ref(pkt);
	}

	if (rc < 0) {
		if (InterlockedCompareExchange((LONG*)&session->err, rc, 0) == 0) {
			remove_session_list(session);
			endpt_session_dec_ref(session);
		}
	}

	endpt_session_dec_ref(session);
}

static void on_pipe_recv_body(ioqueue_file_t* file, 
							  ioqueue_overlapped_t *overlapped,
							  void *buf, 
							  unsigned int transfer_bytes, 
							  void *user_data,
							  int err)
{
	on_recv_body((endpt_session_t*)user_data, transfer_bytes, err);
}
static void on_tcp_recv_body(ioqueue_tcpsock_t* tcpsock, 
							 ioqueue_overlapped_t *overlapped,
							 void *buf, 
							 unsigned int transfer_bytes, 
							 void *user_data,
							 int err)
{
	on_recv_body((endpt_session_t*)user_data, transfer_bytes, err);
}

static int session_start_recv_body(endpt_session_t *session)
{
	int rc = -1;

	if (session->err < 0)
		return rc;

	endpt_session_inc_ref(session);
	session->rx_pending_buf = iobuffer_create(-1, session->rx_pending_pkt_len);

	if (session->type == TYPE_PIPE) {
		rc = ioqueue_file_async_readn(&session->pipe, 
			&session->rx_overlapped, 
			iobuffer_data(session->rx_pending_buf, 0), 
			session->rx_pending_pkt_len,
			&on_pipe_recv_body,
			session);
	} else if (session->type == TYPE_TCP) {
		rc = ioqueue_tcpsock_async_recvn(&session->tcp,
			&session->rx_overlapped,
			iobuffer_data(session->rx_pending_buf, 0),
			session->rx_pending_pkt_len,
			&on_tcp_recv_body,
			session);
	}

	if (rc < 0) {
		iobuffer_destroy(session->rx_pending_buf);
		session->rx_pending_buf = NULL;
		endpt_session_dec_ref(session);
	}

	return rc;
}

static void on_recv_hdr(endpt_session_t *session, int err)
{
	int rc = -1;

	if (!err) {
		rc = session_start_recv_body(session);
	}

	if (rc < 0) {
		if (InterlockedCompareExchange((LONG*)&session->err, rc, 0) == 0) {
			remove_session_list(session);
			endpt_session_dec_ref(session);
		}
	}

	endpt_session_dec_ref(session);
}

static void on_pipe_recv_hdr(ioqueue_file_t *file, 
							ioqueue_overlapped_t *overlapped,
							void *buf, 
							unsigned int transfer_bytes, 
							void *user_data, 
							int err)
{
	on_recv_hdr((endpt_session_t*)user_data, err);
}

static void on_tcp_recv_hdr(ioqueue_tcpsock_t *tcpsock, 
							ioqueue_overlapped_t *overlapped,
							void *buf, 
							unsigned int transfer_bytes, 
							void *user_data, 
							int err)
{
	on_recv_hdr((endpt_session_t*)user_data, err);
}

static int session_start_recv_hdr(endpt_session_t *session)
{
	int rc = -1;

	if (session->err < 0)
		return rc;

	endpt_session_inc_ref(session);

	if (session->type == TYPE_PIPE) {
		rc = ioqueue_file_async_readn(&session->pipe, 
			&session->rx_overlapped, 
			&session->rx_pending_pkt_len, 
			4, 
			&on_pipe_recv_hdr, 
			session);
	} else if (session->type == TYPE_TCP) {
		rc = ioqueue_tcpsock_async_recvn(&session->tcp, 
			&session->rx_overlapped,
			&session->rx_pending_pkt_len,
			4,
			&on_tcp_recv_hdr,
			session);
	}

	if (rc < 0)
		endpt_session_dec_ref(session);

	return rc;
}

static int on_msg(unsigned short msg_id, int param1, int param2)
{
	if (msg_id == MSG_REMOVE_REGISTAR) {
		endpt_session_t *session = (endpt_session_t*)param1;
		remove_session_list(session);
		endpt_session_dec_ref(session);
	}
	return TRUE;
}

static int on_accept(daemon_accetpor_t *dacceptor, void *user_data, int fd, int err)
{
	int idx = (int)user_data;

	if (!err) {
		endpt_session_t *session = create_session(dacceptor, dacceptor->type, fd);
		if (session) {
			int rc;
			add_unregistered_list(session);
			rc = session_start_recv_hdr(session);
			if (rc < 0) {
				remove_session_list(session);
				endpt_session_dec_ref(session);
			}
		}
		start_accept(dacceptor, idx);
	}

	daemon_accetpor_dec_ref(dacceptor);

	return 1;
}

static int on_pipe_accept_callback(ioqueue_pipe_acceptor_t *acceptor, 
								   ioqueue_overlapped_t *overlapped,
								   HANDLE pipe,
								   void *user_data, 
								   int err)
{
	daemon_accetpor_t *dacceptor = CONTAINING_RECORD(acceptor, daemon_accetpor_t, pipe_acceptor);
	return on_accept(dacceptor, user_data, (int)pipe, err);
}

static int on_tcp_accept_callback(ioqueue_acceptor_t *acceptor, 
								  ioqueue_overlapped_t *overlapped,
								  SOCKET in_sock,
								  void *user_data, 
								  int err)
{
	daemon_accetpor_t *dacceptor = CONTAINING_RECORD(acceptor, daemon_accetpor_t, tcp_acceptor);
	return on_accept(dacceptor, user_data, in_sock, err);
}

static int start_accept(daemon_accetpor_t *acceptor, int idx)
{
	int rc = -1;

	daemon_accetpor_inc_ref(acceptor);

	if (acceptor->type == TYPE_PIPE) {
		ioqueue_overlapped_t *ov = ARRAY_IDX(acceptor->arr_ov, idx, ioqueue_overlapped_t*);
		rc = ioqueue_pipe_acceptor_async_accept(&acceptor->pipe_acceptor, ov, &on_pipe_accept_callback, (void*)idx);
	} else if (acceptor->type == TYPE_TCP) {
		ioqueue_overlapped_t *ov = ARRAY_IDX(acceptor->arr_ov, idx, ioqueue_overlapped_t*);
		rc = ioqueue_acceptor_async_accept(&acceptor->tcp_acceptor, ov, &on_tcp_accept_callback, (void*)idx);
	} else {
		TOOLKIT_ASSERT(0);
	}

	if (rc < 0)
		daemon_accetpor_dec_ref(acceptor);

	return rc;
}

static daemon_accetpor_t* create_daemon_acceptor(bus_daemon_t *daemon, char *url)
{
	url_fields uf;
	int kk;
	int rc;
	daemon_accetpor_t *dacceptor = NULL;

	dacceptor = MALLOC_T(daemon_accetpor_t);

	if (url_parse(url, &uf) == 0) {
		if (_stricmp(uf.scheme, "tcp") == 0) {
			rc = ioqueue_acceptor_create(daemon->ioq, uf.host, uf.port, &dacceptor->tcp_acceptor);
			if (rc < 0) {
				free(dacceptor);
				url_free_fields(&uf);
				return NULL;
			}
			ioqueue_acceptor_listen(&dacceptor->tcp_acceptor, 10);
			dacceptor->type = TYPE_TCP;
		} else if (_stricmp(uf.scheme, "pipe") == 0) {
			rc = ioqueue_pipe_acceptor_create(daemon->ioq, uf.host, &dacceptor->tcp_acceptor);
			if (rc < 0) {
				free(dacceptor);
				url_free_fields(&uf);
				return NULL;
			}
			dacceptor->type = TYPE_PIPE;
		}
		url_free_fields(&uf);
	}

	dacceptor->daemon = daemon;
	REF_COUNT_INIT(&dacceptor->ref_cnt);
	dacceptor->arr_ov = array_make(DEFAULT_ACCEPT_OP_COUNT, sizeof(ioqueue_overlapped_t*));
	for (kk = 0; kk < DEFAULT_ACCEPT_OP_COUNT; ++kk)
		ARRAY_PUSH(dacceptor->arr_ov, ioqueue_overlapped_t*) = MALLOC_T(ioqueue_overlapped_t);

	return dacceptor;
}

static void destroy_daemon_acceptor(daemon_accetpor_t *dacceptor)
{
	int i;

	for (i = 0; i < dacceptor->arr_ov->nelts; ++i)
		free(ARRAY_IDX(dacceptor->arr_ov, i, ioqueue_overlapped_t*));
	array_free(dacceptor->arr_ov);

	if (dacceptor->type == TYPE_PIPE) {
		ioqueue_pipe_acceptor_destroy(&dacceptor->pipe_acceptor);
	} else if (dacceptor->type == TYPE_TCP) {
		ioqueue_acceptor_destroy(&dacceptor->tcp_acceptor);
	}

	free(dacceptor);
}

IMPLEMENT_REF_COUNT_MT_STATIC(daemon_accetpor, daemon_accetpor_t, ref_cnt, destroy_daemon_acceptor)

TOOLKIT_API int bus_daemon_create(int n_url, const char *urls[], int nthread, bus_daemon_t **p_daemon)
{
	bus_daemon_t *daemon;
	int i;

	if (n_url == 0)
		return -1;
	if (nthread <= 0) {
		SYSTEM_INFO si;
		GetSystemInfo(&si);
		nthread = min(MAX_THREADS, si.dwNumberOfProcessors << 1);
	}
	WLog_DBG(TAG, "thread num: %d", nthread);
	daemon = MALLOC_T(bus_daemon_t);
	if (daemon == NULL)
		return -1;
	memset(daemon, 0, sizeof(bus_daemon_t));
	daemon->nthread = nthread;
	daemon->arr_acceptor = array_make(n_url, sizeof(daemon_accetpor_t*));
	daemon->arr_thread = array_make(nthread, sizeof(HANDLE));
	daemon->arr_uri = array_make(n_url, sizeof(char*));
	for (i = 0; i < n_url; ++i) {
		WLog_DBG(TAG, "urls[%d]: %s", i, urls[i]);
		ARRAY_PUSH(daemon->arr_uri, char*) = _strdup(urls[i]);
	}
	InitializeCriticalSection(&daemon->lock);
	INIT_LIST_HEAD(&daemon->registered_session_list);
	INIT_LIST_HEAD(&daemon->unregistered_session_list);

	*p_daemon = daemon;
	return 0;
}

TOOLKIT_API int bus_daemon_destroy(bus_daemon_t *daemon)
{
	int i;

	DeleteCriticalSection(&daemon->lock);
	for (i = 0; i < daemon->arr_uri->nelts; ++i)
		free(ARRAY_IDX(daemon->arr_uri, i, char*));
	array_free(daemon->arr_uri);
	array_free(daemon->arr_acceptor);
	array_free(daemon->arr_thread);
	free(daemon);

	return 0;
}

TOOLKIT_API int bus_daemon_start(bus_daemon_t *daemon)
{
	int i;
	daemon->ioq = ioqueue_create();
	if (!daemon->ioq) {
		WLog_ERR(TAG, "ioqueuq create failed!");
		return -1;
	}
	ioqueue_msg_add_handler(daemon->ioq, MSG_REMOVE_REGISTAR, 0, &on_msg);
	for (i = 0; i < daemon->arr_uri->nelts; ++i) {
		char *url = ARRAY_IDX(daemon->arr_uri, i, char*);
		daemon_accetpor_t *dacceptor = create_daemon_acceptor(daemon, url);
		if (dacceptor) {
			int kk;
			for (kk = 0; kk < DEFAULT_ACCEPT_OP_COUNT; ++kk)		//数量5？
				start_accept(dacceptor, kk);
			ARRAY_PUSH(daemon->arr_acceptor, daemon_accetpor_t*) = dacceptor;
		} else {
			WLog_ERR(TAG, "create daemon acceptor failed!");
			return -1;
		}
	}
	daemon->lstop = 0;
	for (i = 0; i < daemon->nthread; ++i) {
		HANDLE thread = (HANDLE)_beginthreadex(NULL, 0, &thread_proc, daemon, 0, NULL);
		if (thread) {
			ARRAY_PUSH(daemon->arr_thread, HANDLE) = thread;
		} else {
			return -1;
		}
	}
	return 0;
}

TOOLKIT_API int bus_daemon_stop(bus_daemon_t *daemon)
{
	int i;

	// exit all worker thread
	InterlockedExchange(&daemon->lstop, 1);
	for (i = 0; i < daemon->arr_thread->nelts; ++i) {
		HANDLE t = ARRAY_IDX(daemon->arr_thread, i, HANDLE);
		WaitForSingleObject(t, INFINITE);
		CloseHandle(t);
	}
	array_clear(daemon->arr_thread);

	// close all pending handles
	{
		endpt_session_t *pos;
		for (i = 0; i < daemon->arr_acceptor->nelts; ++i) {
			daemon_accetpor_t *dacceptor = ARRAY_IDX(daemon->arr_acceptor, i, daemon_accetpor_t*);
			if (dacceptor->type == TYPE_PIPE) {
				ioqueue_pipe_acceptor_close_pending_handle(&dacceptor->pipe_acceptor);
			} else if (dacceptor->type == TYPE_TCP) {
				ioqueue_acceptor_close(&dacceptor->tcp_acceptor);
			}
			daemon_accetpor_dec_ref(dacceptor);
		}
		array_clear(daemon->arr_acceptor);
		list_for_each_entry(pos, &daemon->registered_session_list, endpt_session_t, entry) {
			if (pos->type == TYPE_PIPE) {
				ioqueue_file_close(&pos->pipe);
			} else if (pos->type == TYPE_TCP) {
				ioqueue_tcpsock_close(&pos->tcp);
			}
		}
		list_for_each_entry(pos, &daemon->unregistered_session_list, endpt_session_t, entry) {
			if (pos->type == TYPE_PIPE) {
				ioqueue_file_close(&pos->pipe);
			} else if (pos->type == TYPE_TCP) {
				ioqueue_tcpsock_close(&pos->tcp);
			}
		}
	}

	// poll until all pending io are aborted
	while (!ioqueue_can_exit(daemon->ioq)) {
		ioqueue_poll(daemon->ioq, 10);
	}

	ioqueue_destroy(daemon->ioq);

	return 0;
}