myvtm/Framework/spbase/sp_tbs_win.cpp

#include "precompile.h"

#include "sp_svc.h"
#include "sp_def.h"

#include "sp_ses.h"
#include "sp_tbs.h"
#include "sp_env.h"
#include "sp_bcm.h"
#include "sp_log.h"
#include "sp_uid.h"
#include "sp_var.h"

#include "SpBase.h"

#include "list.h"
#include "hash.h"
#include "array.h"
#include "refcnt.h"
#include "spinlock.h"
#include "strutil.h"
#include "fileutil.h"
#include "memutil.h"
#include "uuid4.h"
#include "dbgutil.h"
#include <winpr/winsock.h>
#include <winpr/string.h>

#define TAG SPBASE_TAG("tbs")

#define SESSION_BUCKET_SIZE	511
#define REGISTER_BUCKET_SIZE 127
#define RX_BUF_SIZE	1024
#define MSG_EVT_IDX	0
#define SRV_EVT_IDX	1
#define MAX_TIMEOUT 30000
#define HDR_LEN		4
#define CONN_INVALID_ID	-1

#define MSG_STOP				0
#define MSG_UAC_ON_CONNECT		1
#define MSG_UAC_ON_CLOSE		2
#define MSG_UAC_ON_DESTROY		3
#define MSG_UAC_ON_ANS			4
#define MSG_ON_EVENT			5

#define RECV_STATE_HEADER	0 /* already recv header length */
#define RECV_STATE_BODY		1 /* recv body */


//数据信息 0x00 00 FF FF
#define PKT_TYPE_INFO				0
#define PKT_TYPE_SESSION			1
#define PKT_TYPE_SESSIONEND			2
#define PKT_TYPE_REQ				3
#define PKT_TYPE_REQACK				4
#define PKT_TYPE_SESSIONACK			5
#define PKT_TYPE_REGISTER_EVENT		6
#define PKT_TYPE_UNREGISTER_EVENT	7
#define PKT_TYPE_EVENT_DATA			8
#define PKT_TYPE_LOG_EVENT			9
#define PKT_TYPE_LOG_WARN			10

// add sys var get & set type by xkm@20150526
#define PKT_TYPE_SET_VAR_REQ		11	// len + type + tsx_id + varname + varvalue 
#define PKT_TYPE_SET_VAR_ACK		12	// len + type + conn_id + tsx_id + errcode + errmsg 
#define PKT_TYPE_GET_VAR_REQ		13	// len + type + tsx_id + varname
#define PKT_TYPE_GET_VAR_ACK		14	// len + type + conn_id + tsx_id + errcode + varvalue/errmsg

//控制信息 0xFF FF 00 00 
#define PKT_TYPE_CONTROL_LINKCONTEXT  (1 << 31)


class link_context {
public:
	char* businessId;	//32
	char* traceId;		//32
	char* spanId;		//16
	char* parentSpanId;	//16
	wchar_t* wbusinessId;	//32
	wchar_t* wtraceId;		//32
	wchar_t* wspanId;		//16
	wchar_t* wparentSpanId;	//16
	//重复代码，需优化
public:
	link_context() {
		businessId = traceId = spanId = parentSpanId = nullptr;
		wbusinessId = wtraceId = wspanId = wparentSpanId = nullptr;
	}
	~link_context() {
		if (businessId)
			free(businessId);
		if (traceId)
			free(traceId);
		if (spanId)
			free(spanId);
		if (parentSpanId)
			free(parentSpanId);
		if (wbusinessId)
			free(wbusinessId);
		if (wtraceId)
			free(wtraceId);
		if (wspanId)
			free(wspanId);
		if (wparentSpanId)
			free(wparentSpanId);
	}
	void InitbusinessId(const std::string t_businessId)
	{
		if (nullptr == businessId) {
			businessId = (char*)malloc(t_businessId.length() + 1);
			ZeroMemory(businessId, t_businessId.length() + 1);
			strcpy_s(businessId, t_businessId.length() + 1, t_businessId.c_str());
		}
	}
	void InittraceId(const std::string t_traceId)
	{
		if (nullptr == traceId) {
			traceId = (char*)malloc(t_traceId.length() + 1);
			ZeroMemory(traceId, t_traceId.length() + 1);
			strcpy_s(traceId, t_traceId.length() + 1, t_traceId.c_str());
		}
	}
	void InitspanId(const std::string t_spanId)
	{
		if (nullptr == spanId) {
			spanId = (char*)malloc(t_spanId.length() + 1);
			ZeroMemory(spanId, t_spanId.length() + 1);
			strcpy_s(spanId, t_spanId.length() + 1, t_spanId.c_str());
		}
	}
	void InitparentSpanId(const std::string t_parentSpanId)
	{
		if (nullptr == parentSpanId) {
			parentSpanId = (char*)malloc(t_parentSpanId.length() + 1);
			ZeroMemory(parentSpanId, t_parentSpanId.length() + 1);
			strcpy_s(parentSpanId, t_parentSpanId.length() + 1, t_parentSpanId.c_str());
		}
	}


	const char* businessIdWtoA()
	{
		if (businessId)
			return businessId;
		else if (wbusinessId)
		{
			int n = WideCharToMultiByte(CP_ACP, 0, wbusinessId, -1, NULL, 0, NULL, NULL);
			businessId = (char*)malloc(n);
			WideCharToMultiByte(CP_ACP, 0, wbusinessId, -1, businessId, n, NULL, NULL);
			return businessId;
		}
		else
			return "None";
	}
	const char* traceIdWtoA()
	{
		if (traceId)
			return traceId;
		else if (wtraceId)
		{
			int n = WideCharToMultiByte(CP_ACP, 0, wtraceId, -1, NULL, 0, NULL, NULL);
			traceId = (char*)malloc(n);
			WideCharToMultiByte(CP_ACP, 0, wtraceId, -1, traceId, n, NULL, NULL);
			return traceId;
		}
		else
			return "None";
	}

	const char* spanIdWtoA()
	{
		if (spanId)
			return spanId;
		else if (wspanId)
		{
			int n = WideCharToMultiByte(CP_ACP, 0, wspanId, -1, NULL, 0, NULL, NULL);
			spanId = (char*)malloc(n);
			WideCharToMultiByte(CP_ACP, 0, wspanId, -1, spanId, n, NULL, NULL);
			return spanId;
		}
		else
			return "None";
	}

	const char* parentSpanIdWtoA()
	{
		if (parentSpanId)
			return parentSpanId;
		else if (wparentSpanId)
		{
			int n = WideCharToMultiByte(CP_ACP, 0, wparentSpanId, -1, NULL, 0, NULL, NULL);
			parentSpanId = (char*)malloc(n);
			WideCharToMultiByte(CP_ACP, 0, wparentSpanId, -1, parentSpanId, n, NULL, NULL);
			return parentSpanId;
		}
		else
			return "None";
	}

};

typedef struct cmd_entry cmd_entry;
typedef struct sub_session sub_session;
typedef struct reg_entry reg_entry;
typedef struct sock_connection sock_connection;

struct cmd_entry {
	struct list_head entry;
	int msg;
	param_size_t param1;
	param_size_t param2;
};

struct sub_session {
	struct hlist_node hentry;
	unsigned int id;
	unsigned int tsx_id;
	sp_ses_uac_t *uac;
	sock_connection *conn;
};

struct reg_entry {
	struct hlist_node hentry;
	unsigned int register_id;
	unsigned int entity_id;
	sp_uid_t uid;
	sp_bcm_listener_t *listener;
	sock_connection *conn;
};

struct sock_connection {
	SOCKET fd;
	int idx;
	int session_cnt;
	struct hlist_head session_bucket[SESSION_BUCKET_SIZE];
	int register_cnt;
	struct hlist_head register_bucket[REGISTER_BUCKET_SIZE];
	iobuffer_queue_t *tx_queue;
	iobuffer_t *rx_pkt;
	char rx_hdr_buf[RX_BUF_SIZE];
	int rx_hdr_buf_len;
	int rx_state;
	int rx_header_len;
	sp_tbs_t *tbs;
	DECLARE_REF_COUNT_MEMBER(ref_cnt);
};
DECLARE_REF_COUNT_STATIC(sock_connection, sock_connection)


struct sp_tbs_t
{
	SOCKET server_fd;
	unsigned long server_ip;
	unsigned short server_port;
	HANDLE conn_evt[MAXIMUM_WAIT_OBJECTS];					// 0 对应待发送消息；1 对应侦听socket事件；2~MAX 对应通讯socket事件
	HANDLE ready_evt;
	int ready_evt_result;
	sock_connection *conn[MAXIMUM_WAIT_OBJECTS];			// 0和1为空
	int conn_cnt;																		// 实际连接数+2
	unsigned int sub_session_seq;
	struct list_head cmd_list;
	spinlock_t cmd_list_lock;
	sp_log_client_t *log_client;
	HANDLE work_thread;
	DWORD work_thread_id;
	sp_ses_mgr_t *ses_mgr;
	sp_var_client_t *var_client;
};

static void on_write(sp_tbs_t *tbs, sock_connection *conn);
static void on_accept(sp_tbs_t *tbs);
static void on_read(sp_tbs_t *tbs, sock_connection *conn);
static void on_close(sp_tbs_t *tbs, sock_connection *conn);
static void on_stop(sp_tbs_t *tbs);

static void on_session_end(sp_tbs_t *tbs, sock_connection *conn, int conn_id);
static void on_info(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int method_id, int method_sig, iobuffer_t **info_pkt);
static void on_req(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int tsx_id, int method_id, int method_sig, int timeout, iobuffer_t **req_pkt);
static void on_session(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, char *entity_name, char *function_name, char *class_name);
static void on_register_event(sp_tbs_t *tbs, sock_connection *conn, int register_id, char *entity_name, char *function_name);
static void on_unregister_event(sp_tbs_t *tbs, sock_connection *conn, int register_id);

static void post_session_end(sp_tbs_t *tbs, sock_connection *conn, int conn_id);
static void post_req_ack(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int tsx_id, int end, int err, const wchar_t *err_msg, iobuffer_t **ack_pkt);
static void post_session_ack(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int tsx_id, int err, const wchar_t *err_msg);
static void post_event(sp_tbs_t *tbs, reg_entry *entry, int conn_id, int tsx_id, iobuffer_t **evt_pkt);

static void uac_on_connect(sp_tbs_t *tbs, sock_connection *conn, sub_session *session, int error);
static void uac_on_close(sp_tbs_t *tbs, sock_connection *conn, sub_session *session, int error);
static void uac_on_ans(sp_tbs_t *tbs, sock_connection *conn, sub_session *session, int tsx_id, int error, int user_error, const char* msg, int end, iobuffer_t **ans_pkt);
static void uac_on_destroy(sp_tbs_t *tbs, sock_connection *conn, sub_session *session);

static void post_msg(sp_tbs_t *tbs, int msg, param_size_t param1, param_size_t param2);
static void destroy_sub_session(sp_tbs_t *tbs, sock_connection *conn, sub_session *session);

postLink g_postlink = NULL;
void sp_tbs_setpostlink(postLink cur)
{
	g_postlink = cur;
}


static const wchar_t *get_err_msg(int rc)
{
	return rc == 0 ? NULL : L"please find the err msg in ErrorCode.h!";
}

static const wchar_t *get_user_err_msg(int rc)
{
	static wchar_t msg[512];
	if (rc == 0)
		return NULL;

	memset(msg, 0, sizeof(msg));
	swprintf_s(msg, 512, L"UserError=%d", rc);
	return msg;
}

static int create_connection(sp_tbs_t *tbs)
{
	sock_connection *conn;
	SOCKET new_client;
	int i;
	BOOL opt;
	struct sockaddr_in from_addr;
	int from_len = sizeof(from_addr);
	
	new_client = accept(tbs->server_fd, (struct sockaddr*)&from_addr, &from_len);
	if (new_client == INVALID_SOCKET) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("accept connection failed! %s %d", _GetFileName(__FILE__), __LINE__);
		return Error_NetBroken;
	}

	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("accept from %s:%d", inet_ntoa(from_addr.sin_addr), ntohs(from_addr.sin_port));

	if (tbs->conn_cnt >= MAXIMUM_WAIT_OBJECTS) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("exceed maximum wait objects, connection discard! %s %d", _GetFileName(__FILE__), __LINE__);
		WSAEventSelect(new_client, tbs->conn_evt[SRV_EVT_IDX], 0);
		closesocket(new_client);
		return Error_Resource;
	}

	conn = MALLOC_T(sock_connection);
	conn->idx = tbs->conn_cnt++;
	conn->fd = new_client;
	conn->rx_hdr_buf_len = 0;
	conn->tx_queue = iobuffer_queue_create();
	conn->rx_pkt = NULL;
	conn->session_cnt = 0;
	conn->register_cnt = 0;
	conn->tbs = tbs;
	conn->rx_state = RECV_STATE_HEADER;
	conn->rx_header_len = 0;
	for (i = 0; i < array_size(conn->session_bucket); ++i) {
		INIT_HLIST_HEAD(&conn->session_bucket[i]);
	}
	for (i = 0; i < array_size(conn->register_bucket); ++i) {
		INIT_HLIST_HEAD(&conn->register_bucket[i]);
	}
	REF_COUNT_INIT(&conn->ref_cnt);

	tbs->conn[conn->idx] = conn;
	tbs->conn_evt[conn->idx] = WSACreateEvent();

	opt = TRUE;
	setsockopt(new_client, IPPROTO_TCP, TCP_NODELAY, (char*)&opt, sizeof(opt));
	opt = TRUE;
	setsockopt(new_client, SOL_SOCKET, SO_DONTLINGER, (char*)&opt, sizeof(opt));
	WSAEventSelect(new_client, tbs->conn_evt[conn->idx], FD_WRITE | FD_READ | FD_CLOSE);

	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("sock connection created!");

	return 0;
}

static void __destroy_connection(sock_connection *conn)
{
	sp_tbs_t *tbs = conn->tbs;
	if (conn->fd != INVALID_SOCKET) {
		WSAEventSelect(conn->fd, tbs->conn_evt[conn->idx], 0);
		closesocket(conn->fd);
		conn->fd = INVALID_SOCKET;
	}
	WSACloseEvent(tbs->conn_evt[conn->idx]);
	tbs->conn_evt[conn->idx] = NULL;
	tbs->conn[conn->idx] = NULL;
	if (conn->idx != tbs->conn_cnt-1) {
		tbs->conn_evt[conn->idx] = tbs->conn_evt[tbs->conn_cnt-1];
		tbs->conn[conn->idx] = tbs->conn[tbs->conn_cnt-1];
		tbs->conn[conn->idx]->idx = conn->idx;
	}
	tbs->conn_cnt--;
	iobuffer_queue_destroy(conn->tx_queue);
	conn->tx_queue = NULL;
	if (conn->rx_pkt) {
		iobuffer_dec_ref(conn->rx_pkt);
		conn->rx_pkt = NULL;
	}
	free(conn);
	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("sock connection destroy!");
}
IMPLEMENT_REF_COUNT_STATIC(sock_connection, sock_connection, ref_cnt, __destroy_connection)

static __inline int is_worker_thread(sp_tbs_t *tbs)
{
	return GetCurrentThreadId() == tbs->work_thread_id;
}

static sub_session *find_sub_session(sock_connection *conn, int conn_id)
{
	sub_session *tpos;
	struct hlist_node *pos;
	int slot = ((unsigned int )conn_id) % SESSION_BUCKET_SIZE;		// bugfix, assure slot positive
	hlist_for_each_entry(tpos, pos, &conn->session_bucket[slot], sub_session, hentry) {
		if (tpos->id == conn_id)
			return tpos;
	}
	return NULL;
}

static void __uac_on_connect(sp_ses_uac_t *uac, int error, void *user_data)
{
	sub_session *session = (sub_session*)user_data;
	if (is_worker_thread(session->conn->tbs)) {
		uac_on_connect(session->conn->tbs, session->conn, session, error);
	} else {
		post_msg(session->conn->tbs, MSG_UAC_ON_CONNECT, (int)session, error);
	}
}

static void __uac_on_close(sp_ses_uac_t *uac, int error, void *user_data)
{
	sub_session *session = (sub_session*)user_data;
	if (is_worker_thread(session->conn->tbs)) {
		uac_on_close(session->conn->tbs, session->conn, session, error);
	} else {
		post_msg(session->conn->tbs, MSG_UAC_ON_CLOSE, (int)session, error);
	}
}

static void __uac_on_destroy(sp_ses_uac_t *uac, void *user_data)
{
	sub_session *session = (sub_session*)user_data;
	TOOLKIT_ASSERT(session->uac == NULL);
	if (is_worker_thread(session->conn->tbs)) {
		uac_on_destroy(session->conn->tbs, session->conn, session);
	} else {
		post_msg(session->conn->tbs, MSG_UAC_ON_DESTROY, (int)session, 0);
	}
}

static void __uac_on_ans(sp_tsx_uac_t *tsx, int error, int end, iobuffer_t **ans_pkt, void *user_data)
{
	sub_session *session = (sub_session*)user_data;
	iobuffer_t *pkt = NULL;
	int tsx_id;
	int user_error = 0;
	int slen = 0;
	char *msg_str = NULL;
	if (error) 
	{
		if (ans_pkt) 
		{
			pkt = *ans_pkt;
			iobuffer_reset(pkt);
			*ans_pkt = NULL;
		} 
		else 
		{
			pkt = iobuffer_create(-1, -1);
		}
	} 
	else 
	{
		TOOLKIT_ASSERT(ans_pkt);
		pkt = *ans_pkt;
		*ans_pkt = NULL;
		iobuffer_read(pkt, IOBUF_T_I4, &error, NULL);
		iobuffer_read(pkt, IOBUF_T_I4, &user_error, NULL);
		if (error) 
		{
			iobuffer_read(pkt, IOBUF_T_STR, NULL, &slen);
			if (slen) {
				msg_str = (char*)malloc(slen + 1);
				iobuffer_read(pkt, IOBUF_T_WSTR, msg_str, NULL);
			}
			iobuffer_reset(pkt);
		}
	}
	tsx_id = sp_tsx_uac_get_id(tsx);
	if (is_worker_thread(session->conn->tbs)) 
	{
		uac_on_ans(session->conn->tbs, session->conn, session, tsx_id, error, user_error, msg_str, end, &pkt);
		if (pkt)
			iobuffer_dec_ref(pkt);
	} 
	else 
	{
		iobuffer_format_write_head(pkt, "s4444", msg_str, &end, &user_error, &error, &tsx_id);
		post_msg(session->conn->tbs, MSG_UAC_ON_ANS, (int)session, (int)pkt);
	}
	
	if (error || end) 
	{
		sp_tsx_uac_close(tsx);
		sp_tsx_uac_destroy(tsx);
	}
}

static void uac_on_connect(sp_tbs_t *tbs, sock_connection *conn, sub_session *session, int error)
{
	if (!error) {
		post_session_ack(tbs, conn, session->id, session->tsx_id, error, NULL);
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("sub session created ok! ses_id = %d, tsx_id = %d", session->id, session->tsx_id);
	} else {
		sp_ses_uac_t *uac = session->uac;
		post_session_ack(tbs, conn, CONN_INVALID_ID, session->tsx_id, error, get_err_msg(error));
		session->uac = NULL;
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("sub session created failed %d! ses_id = %d, tsx_id = %d", error, session->id, session->tsx_id);
		if (uac) {
			sp_ses_uac_close(uac);
			sp_ses_uac_destroy(uac);
		}
	}
}

static void uac_on_close(sp_tbs_t *tbs, sock_connection *conn, sub_session *session, int error)
{
	if (session->uac) {
		sp_ses_uac_t *uac = session->uac;
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("uac on close detected! id = %d, %s %d %d", session->id, _GetFileName(__FILE__), __LINE__, error);
		post_session_end(tbs, conn, session->id);
		session->uac = NULL;
		if (error != Error_Closed)
			sp_ses_uac_close(uac);
		sp_ses_uac_destroy(uac);
	}
}

static void uac_on_ans(sp_tbs_t *tbs, sock_connection *conn, sub_session *session, int tsx_id, int error, int user_error, const char* msg, int end, iobuffer_t **ans_pkt)
{
	if(msg == NULL || strlen(msg) == 0)
		post_req_ack(tbs, conn, session->id, tsx_id, end, error, get_user_err_msg(user_error), ans_pkt);
	else
		post_req_ack(tbs, conn, session->id, tsx_id, end, error, CSimpleStringA2W(msg).GetData(), ans_pkt);
}

static void uac_on_destroy(sp_tbs_t *tbs, sock_connection *conn, sub_session *session)
{
	destroy_sub_session(tbs, conn, session);
	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("destroy sub session(id:%d) uac %s %d", session->id, _GetFileName(__FILE__), __LINE__);
}

static int create_sub_session(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, char *entity_name, char *function_name, char *class_name, sub_session **p_session)
{
	sp_env_t *env = sp_get_env();
	sp_entity_t *ent = sp_mod_mgr_find_entity_by_name(env->mod_mgr, entity_name);
	if (ent) {
		int rc;
		sub_session *session = MALLOC_T(sub_session);
		sp_ses_uac_callback cb;
		iobuffer_t *pkt = NULL;
		char *param = NULL;
		session->id = tbs->sub_session_seq++;
		session->conn = conn;
		session->tsx_id = tsx_id;
		hlist_add_head(&session->hentry, &conn->session_bucket[session->id % SESSION_BUCKET_SIZE]);
		conn->session_cnt++;
		sock_connection_inc_ref(conn);
		cb.user_data = session;
		cb.on_close = &__uac_on_close;
		cb.on_destroy = &__uac_on_destroy;
		cb.on_connect = &__uac_on_connect;
		rc = sp_ses_uac_create(tbs->ses_mgr, ent->mod->cfg->idx, ent->cfg->idx, &cb, &session->uac);
		if (rc != 0) {
			goto on_error;
		}
		pkt = iobuffer_create(-1, -1);
		if (function_name == NULL || strlen(function_name) == 0) {
			param = class_name;
		} else {
			param = strdup_printf("%s::%s", class_name, function_name);
		}
		iobuffer_write(pkt, IOBUF_T_STR, param, -1);
		if (param != class_name) {
			FREE(param);
		}
		rc = sp_ses_uac_async_connect(session->uac, 10000, &pkt);
		if (pkt)
			iobuffer_dec_ref(pkt);
		if (rc != 0) {
			goto on_error;
		}

on_error:
		if (rc != 0) {
			conn->session_cnt--;
			hlist_del(&session->hentry);
			sock_connection_dec_ref(conn);
			free(session);
		} else {
			*p_session = session;
		}

		return rc;
	} else {
		return Error_NotExist;
	}
}

static void destroy_sub_session(sp_tbs_t *tbs, sock_connection *conn, sub_session *session)
{
	conn->session_cnt--;
	hlist_del(&session->hentry);
	if (session->uac) {
		sp_ses_uac_t *uac = session->uac;
		session->uac = NULL;
		sp_ses_uac_destroy(uac);
	}
	sock_connection_dec_ref(conn);
	free(session);
	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("destroy sub session(id:%d) %s %d", session->id, _GetFileName(__FILE__), __LINE__);
}

static void post_session_ack(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int tsx_id, int err, const wchar_t *err_msg)
{
	if (conn->fd != INVALID_SOCKET) {
		int len;
		iobuffer_t *pkt = iobuffer_create(-1, -1);
		int type = PKT_TYPE_SESSIONACK;
		iobuffer_format_write(pkt, "4444w", &type, &conn_id, &tsx_id, &err, err_msg);
		len = iobuffer_get_length(pkt)-4;
		iobuffer_write_head(pkt, IOBUF_T_I4, &len, 0);
		iobuffer_queue_enqueue(conn->tx_queue, pkt);
		on_write(tbs, conn);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send PKT_TYPE_SESSIONACK tsx_id=%d, err=%d", tsx_id, err);
	}
}

static void post_req_ack(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int tsx_id, int end, int err, const wchar_t *err_msg, iobuffer_t **ack_pkt)
{
	if (conn->fd != INVALID_SOCKET) {
		iobuffer_t *pkt = NULL;
		int len;
		char bend = !!end;
		int type = PKT_TYPE_REQACK;

		if (ack_pkt) {
			pkt = *ack_pkt;
			*ack_pkt = NULL;
		}

		if (!pkt) {
			pkt = iobuffer_create(-1, -1);
		}

		iobuffer_format_write_head(pkt, "w41444", err_msg, &err, &bend, &tsx_id, &conn_id, &type);
		len = iobuffer_get_length(pkt)-4;
		iobuffer_write_head(pkt, IOBUF_T_I4, &len, 0);
		iobuffer_queue_enqueue(conn->tx_queue, pkt);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send PKT_TYPE_REQACK tsx_id=%d, err=%d, pktLen=%d", tsx_id, err, iobuffer_get_length(pkt));
		on_write(tbs, conn);		
	}
}

static void post_set_var_ack(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, int err, const wchar_t *err_msg)
{
	if (conn->fd != INVALID_SOCKET) {
		int len;
		int type = PKT_TYPE_SET_VAR_ACK;
		iobuffer_t *pkt = iobuffer_create(-1, -1);

		int conn_id = CONN_INVALID_ID;
		iobuffer_format_write(pkt, "4444w", &type, &conn_id, &tsx_id, &err, err_msg);
		len = iobuffer_get_length(pkt) - 4;
		iobuffer_write_head(pkt, IOBUF_T_I4, &len, 0);
		iobuffer_queue_enqueue(conn->tx_queue, pkt);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send PKT_TYPE_SET_VAR_ACK tsx_id=%d, err=%d", tsx_id, err);
		on_write(tbs, conn);
	}
}


static void post_get_var_ack(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, int err, const wchar_t *err_msg, const wchar_t *value)
{
	if (conn->fd != INVALID_SOCKET) {
		int len;
		int type = PKT_TYPE_GET_VAR_ACK;
		iobuffer_t *pkt = iobuffer_create(-1, -1);

		int conn_id = CONN_INVALID_ID;
		iobuffer_format_write(pkt, "4444w", &type, &conn_id, &tsx_id, &err, err == 0 ? value : err_msg);
		len = iobuffer_get_length(pkt) - 4;
		iobuffer_write_head(pkt, IOBUF_T_I4, &len, 0);
		iobuffer_queue_enqueue(conn->tx_queue, pkt);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send PKT_TYPE_GET_VAR_ACK tsx_id=%d, err=%d", tsx_id, err);
		on_write(tbs, conn);
	}
}

static void post_session_end(sp_tbs_t *tbs, sock_connection *conn, int conn_id)
{
	if (conn->fd != INVALID_SOCKET) {
		int len;
		iobuffer_t *pkt = iobuffer_create(-1, -1);
		int type = PKT_TYPE_SESSIONEND;
		iobuffer_format_write(pkt, "44", &type, &conn_id);
		len = iobuffer_get_length(pkt)-4;
		iobuffer_write_head(pkt, IOBUF_T_I4, &len, 0);
		iobuffer_queue_enqueue(conn->tx_queue, pkt);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send PKT_TYPE_SESSIONEND");
		on_write(tbs, conn);
	}
}

static void on_session(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, char *entity_name, char *function_name, char *class_name)
{
	sub_session *session = NULL;
	int rc;

	rc = create_sub_session(tbs, conn, tsx_id, entity_name, function_name, class_name, &session);
	if (rc == 0) {
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("start create sub session!");
		//post_session_ack(tbs, conn, session->id, tsx_id, rc, NULL);
	} else {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("create_sub_session failed! entity: %s, err = %d %s %d",
			entity_name, rc, _GetFileName(__FILE__), __LINE__);
		post_session_ack(tbs, conn, CONN_INVALID_ID, tsx_id, rc, get_err_msg(rc));
	}
}

static reg_entry *find_reg_entry(sock_connection *conn, int register_id)
{
	reg_entry *tpos;
	struct hlist_node *pos;
	int slot = ((unsigned int)register_id) % REGISTER_BUCKET_SIZE;	// bugfix, assure slot positive
	hlist_for_each_entry(tpos, pos, &conn->register_bucket[slot], reg_entry, hentry) {
		if (tpos->register_id == register_id) {
			return tpos;
		}
	}
	return NULL;
}

static void post_event(sp_tbs_t *tbs, reg_entry *entry, int conn_id, int tsx_id, iobuffer_t **evt_pkt)
{
	if (entry->conn->fd != INVALID_SOCKET) {
		int type;
		int len;
		iobuffer_t *pkt = *evt_pkt;
		*evt_pkt = NULL;
		type = PKT_TYPE_EVENT_DATA;
		iobuffer_write_head(pkt, IOBUF_T_I4, &tsx_id, 0);
		iobuffer_write_head(pkt, IOBUF_T_I4, &conn_id, 0);
		iobuffer_write_head(pkt, IOBUF_T_I4, &type, 0);
		len = iobuffer_get_length(pkt)-4;
		iobuffer_write_head(pkt, IOBUF_T_I4, &len, 0);
		iobuffer_queue_enqueue(entry->conn->tx_queue, pkt);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send PKT_TYPE_EVENT_DATA tsx_id=%d", tsx_id);
		on_write(tbs, entry->conn);
		//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("post event len:%d", len);
	}
	sp_bcm_listener_dec_ref(entry->listener); //@
}

static void __bcm_on_message_raw(sp_bcm_listener_t *listener, int from_client_id, iobuffer_t **msg_pkt, void *user_data)
{
	reg_entry *entry = (reg_entry*)user_data;
	iobuffer_t *pkt = *msg_pkt;
	*msg_pkt = NULL;
	sp_bcm_listener_inc_ref(listener); //@
	post_msg(entry->conn->tbs, MSG_ON_EVENT, (int)entry, (int)pkt);
	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("post event from_client_id:%d", from_client_id);
}

static void __bcm_on_destroy(sp_bcm_listener_t *listener, void *user_data)
{
	reg_entry *entry = (reg_entry*)user_data;
	entry->conn->register_cnt--;
	hlist_del(&entry->hentry);
	sock_connection_dec_ref(entry->conn);
	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("unregister event ok! register_id = %d", entry->register_id);
	free(entry);
}

static void on_register_event(sp_tbs_t *tbs, sock_connection *conn, int register_id, char *entity_name, char *function_name)
{
	sp_env_t *env = sp_get_env();
	sp_entity_t *ent = sp_mod_mgr_find_entity_by_name(env->mod_mgr, entity_name);
	if (ent) {
		int rc;
		sp_svc_t *svc = sp_ses_mgr_get_svc(tbs->ses_mgr);
		reg_entry *entry;
		sp_bcm_listener_cb cb;
		if (find_reg_entry(conn, register_id)) {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("register entry already exist, register id %d", register_id);
			return;
		}
		entry = ZALLOC_T(reg_entry);
		entry->register_id = register_id;
		entry->entity_id = ent->cfg->idx;
		hlist_add_head(&entry->hentry, &conn->register_bucket[((unsigned int)register_id) % REGISTER_BUCKET_SIZE]);		// bugfix, assure index positive
		conn->register_cnt++;
		sock_connection_inc_ref(conn);
		entry->conn = conn;
		cb.on_message_raw = &__bcm_on_message_raw;
		cb.on_message = NULL;
		cb.on_destroy = &__bcm_on_destroy;
		cb.user_data = entry;
		rc = sp_bcm_listener_create(svc, entry->entity_id, function_name, &cb, &entry->listener);
		if (rc != 0) {
			goto on_error;
		}
		rc = sp_bcm_listener_subscribe(entry->listener, &entry->uid);
		if (rc != 0) {
			goto on_error;
		}
on_error:
		if (rc != 0) {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("create bcm listener failed! entity = %s, register_id = %d", ent->cfg->name, register_id);
			conn->register_cnt--;
			hlist_del_init(&entry->hentry);
			if (entry->listener) {
				sp_bcm_listener_destroy(entry->listener);
			}
			free(entry);
			sock_connection_dec_ref(conn);
		} else {
			DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("register event for %s ok! register_id = %d", ent->cfg->name, register_id);
		}
	} else {
		DbgWithLink(LOG_LEVEL_ERROR, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("cannot find entity %s!", entity_name);
	}
}

static void on_unregister_event(sp_tbs_t *tbs, sock_connection *conn, int register_id)
{
	reg_entry *entry = find_reg_entry(conn, register_id);
	if (entry) {
		if (sp_bcm_listener_unsubscribe(entry->listener) == 0) {
			sp_bcm_listener_destroy(entry->listener);
		} else {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("entry already unregistered! register_id = %d", register_id);
		}
	} else {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("%s, entry not found, registered_id = %d", __FUNCTION__, register_id);
	}
}

static void on_log_event(sp_tbs_t *tbs, sock_connection *conn, int severity_level, int user_code, const char *msg, const linkContext &t_context)
{
	sp_log_client_logWithLink(tbs->log_client, Log_Event, severity_level, 0, user_code, 0, 0, NULL == msg ? "" : msg, NULL == msg ? 0 : strlen(msg)
		, t_context.bussinessId.GetData(), t_context.traceId.GetData(), t_context.spanId.GetData(), t_context.parentSpanId.GetData());
}

static void on_log_warn(sp_tbs_t *tbs, sock_connection *conn, int severity_level, int user_code, const char *msg, const linkContext& t_context)
{
	sp_log_client_logWithLink(tbs->log_client, Log_Warning, severity_level, 0, user_code, 0, 0, NULL == msg ? "" : msg, NULL == msg ? 0 : strlen(msg)
		, t_context.bussinessId.GetData(), t_context.traceId.GetData(), t_context.spanId.GetData(), t_context.parentSpanId.GetData());
}

static void on_req(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int tsx_id, int method_id, int method_sig, int timeout, iobuffer_t **req_pkt)
{
	sub_session *session = find_sub_session(conn, conn_id);
	if (session) {
		if (session->uac) {
			int rc;
			sp_tsx_uac_t *tsx;
			sp_tsx_uac_callback cb;
			cb.user_data = session;
			cb.on_ans = &__uac_on_ans;
			cb.on_destroy = NULL;
			rc = sp_tsx_uac_create(session->uac, tsx_id, method_id, method_sig, &cb, &tsx);
			if (rc == 0) {
				rc = sp_tsx_uac_async_req(tsx, timeout, req_pkt);
				if (rc == 0) {
					WLog_DBG(TAG, "send req: tsx_id=%d, method_id=%d, method_sig=%d, pkt_size=%d",
						tsx_id, method_id, method_sig, *req_pkt == NULL ? 0 : iobuffer_get_length(*req_pkt));
				} else {
					DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("async req tsx failed! err = %d %s %d", rc, _GetFileName(__FILE__), __LINE__);
					post_req_ack(tbs, conn, conn_id, tsx_id, 1, rc, get_err_msg(rc), NULL);
					sp_tsx_uac_destroy(tsx);
				}
			} else {
				DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("create req tsx failed! %s %d", _GetFileName(__FILE__), __LINE__);
				post_req_ack(tbs, conn, conn_id, tsx_id, 1, rc, get_err_msg(rc), NULL);
			}
		} else {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("session already closed! %s %d", _GetFileName(__FILE__), __LINE__);
			post_req_ack(tbs, conn, conn_id, tsx_id, 1, Error_NetBroken, get_err_msg(Error_NetBroken), NULL);
		}
	} else {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("cannot find session id in htable! ignored! %s %d", _GetFileName(__FILE__), __LINE__);
		post_req_ack(tbs, conn, conn_id, tsx_id, 1, Error_NotExist, get_err_msg(Error_NotExist), NULL);
	}
}

static void on_info(sp_tbs_t *tbs, sock_connection *conn, int conn_id, int method_id, int method_sig, iobuffer_t **info_pkt)
{
	sub_session *session = find_sub_session(conn, conn_id);
	if (session) {
		if (session->uac) {
			int rc = sp_ses_uac_send_info(session->uac, method_id, method_sig, info_pkt);
			if (rc != 0) {
				DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("uac send info failed! error = %d %s %d", rc, _GetFileName(__FILE__), __LINE__);
			}
			else {
				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("send info: method_id=%d, method_sig=%d, pkt_size=%d", method_id, method_sig,
				//	*info_pkt == NULL ? 0 : iobuffer_get_length(*info_pkt));
			}
		} else {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("session already closed! info ignored ! %s %d", _GetFileName(__FILE__), __LINE__);
		}
	} else {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("cannot find session id in htable! ignored! %s %d", _GetFileName(__FILE__), __LINE__);
	}
}

static void on_session_end(sp_tbs_t *tbs, sock_connection *conn, int conn_id)
{
	sub_session *session = find_sub_session(conn, conn_id);
	if (session) {
		if (session->uac) {
			sp_ses_uac_t *uac = session->uac;
			session->uac = NULL;
			if (sp_ses_uac_close(uac) == 0) {
				sp_ses_uac_destroy(uac);
			} else {
				DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("duplicated uac close!");
			}
		}
	} else {
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("cannot find session id in htable! ignored! %s %d", _GetFileName(__FILE__), __LINE__);
	}
}

static void on_stop(sp_tbs_t *tbs)
{
	int i;
	WSAEventSelect(tbs->server_fd, tbs->conn_evt[SRV_EVT_IDX], 0);
	closesocket(tbs->server_fd);
	tbs->server_fd = INVALID_SOCKET;
	for (i = tbs->conn_cnt-1; i > SRV_EVT_IDX; --i) {
		sock_connection *conn = tbs->conn[i];
		TOOLKIT_ASSERT(conn);
		on_close(tbs, conn);
	}
}

static void on_close(sp_tbs_t *tbs, sock_connection *conn)
{
	int i;
	DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("socket on close is invoked!");
	if (conn->fd != INVALID_SOCKET) {
		WSAEventSelect(conn->fd, tbs->conn_evt[conn->idx], 0);
		closesocket(conn->fd);
		conn->fd = INVALID_SOCKET;
	}
	for (i = 0; i < SESSION_BUCKET_SIZE; ++i) {
		sub_session *tpos;
		struct hlist_node *pos, *n;
		hlist_for_each_entry_safe(tpos, pos, n, &conn->session_bucket[i], sub_session, hentry) {
			if (tpos->uac) {
				sp_ses_uac_t *uac = tpos->uac;
				tpos->uac = NULL;
				if (sp_ses_uac_close(uac) == 0) {
					sp_ses_uac_destroy(uac);
				} else {
					DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("duplicated uac close! %s %d", _GetFileName(__FILE__), __LINE__);
				}
			}
		}
	}
	for (i = 0; i < REGISTER_BUCKET_SIZE; ++i) {
		reg_entry *tpos;
		struct hlist_node *pos, *n;
		hlist_for_each_entry_safe(tpos, pos, n, &conn->register_bucket[i], reg_entry, hentry) {
			if (tpos->listener) {
				if (sp_bcm_listener_unsubscribe(tpos->listener) == 0) {
					sp_bcm_listener_destroy(tpos->listener);
				}
			}
		}
	}
	sock_connection_dec_ref(conn);
}

static void on_set_var_req(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, char *name, char *value)
{
	int rc;
	if (name == NULL)
	{
		rc = Error_Param;
		post_set_var_ack(tbs, conn, tsx_id, rc, L"param [name] is null");
		return;
	}

	rc = sp_var_client_set((sp_var_client_t*)tbs->var_client, name, value,  0);
	post_set_var_ack(tbs, conn, tsx_id, rc, get_err_msg(rc));
}

static void on_get_var_req(sp_tbs_t *tbs, sock_connection *conn, int tsx_id, char *name)
{	
	int len = 260;
	int rc;
	char szTmp[260] = { 0 };
	wchar_t wszValue[260] = { 0 };

	if (name == NULL)
	{
		rc = Error_Param;
		post_get_var_ack(tbs, conn, tsx_id, rc, L"param [name] is null", NULL);
		return;
	}

	rc = sp_var_client_lock(tbs->var_client);
	if (rc == 0) {
		rc = sp_var_client_get((sp_var_client_t*)tbs->var_client, name, szTmp, &len);
	}
	
	sp_var_client_unlock(tbs->var_client);
	
	if (rc == 0)
	{
		len = 260;
		MultiByteToWideChar(CP_ACP, 0, szTmp, -1, &wszValue[0], len);
		post_get_var_ack(tbs, conn, tsx_id, rc, get_err_msg(rc), wszValue);
	}
	else
		post_get_var_ack(tbs, conn, tsx_id, rc, get_err_msg(rc), NULL);
}

static void process_tcp_pkt(sp_tbs_t *tbs, sock_connection *conn, iobuffer_t **p_pkt)
{
	iobuffer_t *pkt = *p_pkt;
	int type;
	iobuffer_read(pkt, IOBUF_T_I4, &type, NULL);
	link_context cur;
	char linkStr[512] = "";
	bool withLinkContex = !!(type & PKT_TYPE_CONTROL_LINKCONTEXT);
	//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("process_tcp_pkt withLinkContex：%d", withLinkContex);
	int linkId = 0;
	type = type & 0x0000FFFF;	//clear control part
	switch (type) {
		case PKT_TYPE_INFO:
			{
				int conn_id;
				int method_id;
				int method_sig;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "444wwww", &conn_id, &method_id, &method_sig, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
					iobuffer_set_linkInfo(pkt, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
				}
				else
					iobuffer_format_read(pkt, "444", &conn_id, &method_id, &method_sig);
				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_INFO conn_id=%d method_id=%d method_sig=%d, %s", conn_id, method_id, method_sig, linkStr);
				on_info(tbs, conn, conn_id, method_id, method_sig, &pkt);
			}
			break;
		case PKT_TYPE_REQ:
			{
				int conn_id;
				int tsx_id;
				int method_id;
				int method_sig;
				int timeout;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "44444wwww", &conn_id, &tsx_id, &method_id, &method_sig, &timeout, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
					iobuffer_set_linkInfo(pkt, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
				}
				else
					iobuffer_format_read(pkt, "44444", &conn_id, &tsx_id, &method_id, &method_sig, &timeout);
				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_REQ conn_id=%d tsx_id=%d method_id=%d method_sig=%d timeout=%d, %s", conn_id, tsx_id, method_id, method_sig, timeout, linkStr);
				on_req(tbs, conn, conn_id, tsx_id, method_id, method_sig, timeout, &pkt);
			}
			break;
		case PKT_TYPE_SESSION:
			{
				int tsx_id;
				wchar_t *wentity_name;
				wchar_t *wfunction_name;
				wchar_t *wclass_name;
				char *entity_name;
				char *function_name;
				char *class_name;
				int n;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "4wwwwwww", &tsx_id, &wentity_name, &wfunction_name, &wclass_name, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "4www", &tsx_id, &wentity_name, &wfunction_name, &wclass_name);
				n = WideCharToMultiByte(CP_ACP, 0, wentity_name, -1, NULL, 0, NULL, NULL);
				entity_name = (char *)malloc(n);
				WideCharToMultiByte(CP_ACP, 0, wentity_name, -1, entity_name, n, NULL, NULL);
				FREE(wentity_name);
				n = WideCharToMultiByte(CP_ACP, 0, wfunction_name, -1, NULL, 0, NULL, NULL);
				function_name = (char *)malloc(n);
				WideCharToMultiByte(CP_ACP, 0, wfunction_name, -1, function_name, n, NULL, NULL);
				FREE(wfunction_name);
				n = WideCharToMultiByte(CP_ACP, 0, wclass_name, -1, NULL, 0, NULL, NULL);
				class_name = (char *)malloc(n);
				WideCharToMultiByte(CP_ACP, 0, wclass_name, -1, class_name, n, NULL, NULL);
				FREE(wclass_name);
				DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("recv PKT_TYPE_SESSION tsx_id=%d entity_name=%s function_name=%s class_name=%s", tsx_id, entity_name, function_name, class_name);
				on_session(tbs, conn, tsx_id, entity_name, function_name, class_name);
				if (entity_name)
					free(entity_name);
				if (function_name)
					free(function_name);
				if (class_name)
					free(class_name);
			}
			break;
		case PKT_TYPE_SESSIONEND:
			{
				int conn_id;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "4wwww", &conn_id, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					if(g_postlink) linkId = g_postlink(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "4", &conn_id);
				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_SESSIONEND conn_id=%d, %s", conn_id, linkStr);
				on_session_end(tbs, conn, conn_id);
			}
			break;
		case PKT_TYPE_REGISTER_EVENT:
			{
				int register_id;
				wchar_t *wentity_name;
				char *entity_name;
				wchar_t *wfunction_name;
				char *function_name;
				int n;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "4wwwwww", &register_id, &wentity_name, &wfunction_name, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					if(g_postlink) linkId = g_postlink(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "4ww", &register_id, &wentity_name, &wfunction_name);
				n = WideCharToMultiByte(CP_ACP, 0, wentity_name, -1, NULL, 0, NULL, NULL);
				entity_name = (char *)malloc(n);
				WideCharToMultiByte(CP_ACP, 0, wentity_name, -1, entity_name, n, NULL, NULL);
				FREE(wentity_name);
				n = WideCharToMultiByte(CP_ACP, 0, wfunction_name, -1, NULL, 0, NULL, NULL);
				function_name = (char*)malloc(n);
				WideCharToMultiByte(CP_ACP, 0, wfunction_name, -1, function_name, n, NULL, NULL);
				FREE(wfunction_name);
				DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM)("recv PKT_TYPE_REGISTER_EVENT register_id=%d, entity_name=%s, function_name=%s", register_id, entity_name, function_name);
				on_register_event(tbs, conn, register_id, entity_name, function_name);
				if (entity_name)
					free(entity_name);
				if (function_name)
					free(function_name);
			}
			break;
		case PKT_TYPE_UNREGISTER_EVENT:
			{
				int register_id;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "4wwww", &register_id, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					if(g_postlink) linkId = g_postlink(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "4", &register_id);

				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_UNREGISTER_EVENT register_id=%d, %s", register_id, linkStr);
				on_unregister_event(tbs, conn, register_id);
			}
			break;
		case PKT_TYPE_LOG_EVENT:
			{
				int severity_level;
				int user_code;
				wchar_t *wmsg = NULL;
				char *msg = NULL;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "44wwwww", &severity_level, &user_code, &wmsg, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "44w", &severity_level, &user_code, &wmsg);
				if (wmsg) {
					int n = WideCharToMultiByte(CP_ACP, 0, wmsg, -1, NULL, 0, NULL, NULL);
					msg = (char*)malloc(n);
					WideCharToMultiByte(CP_ACP, 0, wmsg, -1, msg, n, NULL, NULL);
					FREE(wmsg);
				}
				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_LOG_EVENT severity_level=%d, user_code=0x%08x, msg=%s, %s", severity_level, user_code, msg ? msg : "<null>", linkStr);
				linkContext t_Context(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
				on_log_event(tbs, conn, severity_level, user_code, msg, t_Context);
				if (msg)
					free(msg);
			}
			break;
		case PKT_TYPE_LOG_WARN:
			{
				int severity_level;
				int user_code;
				wchar_t *wmsg = NULL;
				char *msg = NULL;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "44wwwww", &severity_level, &user_code, &wmsg, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					if(g_postlink) linkId = g_postlink(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "44w", &severity_level, &user_code, &wmsg);
				if (wmsg) {
					int n = WideCharToMultiByte(CP_ACP, 0, wmsg, -1, NULL, 0, NULL, NULL);
					msg = (char*)malloc(n);
					WideCharToMultiByte(CP_ACP, 0, wmsg, -1, msg, n, NULL, NULL);
					FREE(wmsg);
				}
				//DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_LOG_WARN severity_level=%d, user_code=0x%08x, msg=%s, %s", severity_level, user_code, msg ? msg : "<null>", linkStr);
				linkContext t_Context(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
				on_log_warn(tbs, conn, severity_level, user_code, msg, t_Context);
				if (msg)
					free(msg);
			}
			break;
		case PKT_TYPE_SET_VAR_REQ:
			{
				int tsx_id = 0;
				wchar_t *wname = NULL;
				wchar_t *wvalue = NULL;
				char *name = NULL;
				char *value = NULL;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "4wwwwww", &tsx_id, &wname, &wvalue, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					if(g_postlink) linkId = g_postlink(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}
				else
					iobuffer_format_read(pkt, "4ww", &tsx_id, &wname, &wvalue, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
				
				if (wname)
				{
					int n = WideCharToMultiByte(CP_ACP, 0, wname, -1, NULL, 0, NULL, NULL);
					name = (char*)malloc(n);
					WideCharToMultiByte(CP_ACP, 0, wname, -1, name, n, NULL, NULL);
					FREE(wname);
				}

				if (wvalue)
				{
					int n = WideCharToMultiByte(CP_ACP, 0, wvalue, -1, NULL, 0, NULL, NULL);
					value = (char*)malloc(n);
					WideCharToMultiByte(CP_ACP, 0, wvalue, -1, value, n, NULL, NULL);
					FREE(wvalue);
				}

				DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_SET_VAR_REQ tsx_id=%d, name=%s, value=%s, %s"
					, tsx_id, name ? name : "<null>", value ? value : "<null>", linkStr);
				on_set_var_req(tbs, conn, tsx_id, name, value);
				
				if (name)
					free(name);
				if (value)
					free(value);
			}
			break;
		case PKT_TYPE_GET_VAR_REQ:
			{
				int tsx_id = 0;
				wchar_t *wname = NULL;
				char *name = NULL;
				if (withLinkContex)
				{
					iobuffer_format_read(pkt, "4wwwww", &tsx_id, &wname, &cur.wbusinessId, &cur.wtraceId, &cur.wspanId, &cur.wparentSpanId);
					if(g_postlink) linkId = g_postlink(cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA());
					sprintf_s(linkStr, sizeof(linkStr), "withLinkContex：%d linkcontext:%s-%s-%s-%s-%d",
						withLinkContex, cur.businessIdWtoA(), cur.traceIdWtoA(), cur.spanIdWtoA(), cur.parentSpanIdWtoA(), linkId);
				}					
				else
					iobuffer_format_read(pkt, "4w", &tsx_id, &wname);

				if (wname)
				{
					int n = WideCharToMultiByte(CP_ACP, 0, wname, -1, NULL, 0, NULL, NULL);
					name = (char*)malloc(n);
					WideCharToMultiByte(CP_ACP, 0, wname, -1, name, n, NULL, NULL);
					FREE(wname);
				}
							
				DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv PKT_TYPE_GET_VAR_REQ tsx_id=%d, name=%s, %s", tsx_id, name ? name : "<null>", linkStr);
				on_get_var_req(tbs, conn, tsx_id, name);

				if (name)
					free(name);
			}
			break;
		default:
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("recv unknown pkt type: %d", type);
			//assert(0);
			break;
	}
	*p_pkt = NULL;
	if (pkt)
		iobuffer_dec_ref(pkt);
}

static void on_read(sp_tbs_t *tbs, sock_connection *conn)
{
	if (conn->rx_state == RECV_STATE_HEADER) {
		int t = recv(conn->fd, &conn->rx_hdr_buf[conn->rx_hdr_buf_len], RX_BUF_SIZE-conn->rx_hdr_buf_len, 0);
		if (t > 0) {
			int offset = 0;
			conn->rx_hdr_buf_len += t;
			while (conn->rx_hdr_buf_len-offset >= HDR_LEN) {
				iobuffer_t *pkt;
				memcpy(&conn->rx_header_len, conn->rx_hdr_buf+offset, HDR_LEN);
				conn->rx_header_len += 4; // fixed hdr not include type!!!
				offset += HDR_LEN;
				pkt = iobuffer_create(-1, conn->rx_header_len);
				if (conn->rx_hdr_buf_len-offset >= conn->rx_header_len) {
					memcpy(iobuffer_data(pkt, -1), conn->rx_hdr_buf+offset, conn->rx_header_len);
					offset += conn->rx_header_len;
					iobuffer_push_count(pkt, conn->rx_header_len);
					process_tcp_pkt(tbs, conn, &pkt);
					if (pkt)
						iobuffer_dec_ref(pkt);
				} else {
					memcpy(iobuffer_data(pkt, -1), conn->rx_hdr_buf+offset, conn->rx_hdr_buf_len-offset);
					iobuffer_push_count(pkt, conn->rx_hdr_buf_len-offset);
					offset = conn->rx_hdr_buf_len;
					TOOLKIT_ASSERT(conn->rx_pkt == NULL);
					conn->rx_pkt = pkt;
					conn->rx_state = RECV_STATE_BODY;
				}
			}
			if (offset == conn->rx_hdr_buf_len) {
				conn->rx_hdr_buf_len = 0;
			} else {
				if (offset > 0) {
					TOOLKIT_ASSERT(conn->rx_state == RECV_STATE_HEADER);
					memmove(&conn->rx_hdr_buf[0], &conn->rx_hdr_buf[offset], conn->rx_hdr_buf_len-offset);
					conn->rx_hdr_buf_len -= offset;
				}
			}
		}
	} else if (conn->rx_state == RECV_STATE_BODY) {
		int offset, t;
		TOOLKIT_ASSERT(conn->rx_pkt);
		offset = iobuffer_get_length(conn->rx_pkt);
		t = recv(conn->fd, iobuffer_data(conn->rx_pkt, -1), conn->rx_header_len-offset, 0);
		if (t > 0) {
			iobuffer_push_count(conn->rx_pkt, t);
			if (offset+t == conn->rx_header_len) {
				process_tcp_pkt(tbs, conn, &conn->rx_pkt);
				if (conn->rx_pkt) {
					iobuffer_dec_ref(conn->rx_pkt);
					conn->rx_pkt = NULL;
				}
				conn->rx_hdr_buf_len = 0;
				conn->rx_state = RECV_STATE_HEADER;
			}
		}
	} else {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("cannot go here, bug! %s, %d", _GetFileName(__FILE__), __LINE__);
		TOOLKIT_ASSERT(0);
	}
}

static void on_write(sp_tbs_t *tbs, sock_connection *conn)
{
	if (conn->fd == INVALID_SOCKET)
		return;
	while (iobuffer_queue_count(conn->tx_queue) > 0) {
		iobuffer_t *pkt = iobuffer_queue_head(conn->tx_queue);
		int sended = 0;
		int total = iobuffer_get_length(pkt);
		while (sended < total) {
			int t = send(conn->fd, iobuffer_data(pkt, 0), total-sended, 0);
			if (t > 0) {
				sended += t;
				iobuffer_pop_count(pkt, t);
			} else {
				break;
			}
		}
		if (sended < total) {
			break;
		} else {
			iobuffer_queue_deque(conn->tx_queue);
			iobuffer_dec_ref(pkt);
		}
	}
}

static void on_accept(sp_tbs_t *tbs)
{
	int rc;
	rc = create_connection(tbs);
	if (rc != 0) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("create connection failed! err = %d %s %d", rc, _GetFileName(__FILE__), __LINE__);
	} else {
		DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("create connection ok! %s %d", _GetFileName(__FILE__), __LINE__);
	}
}

static void post_msg(sp_tbs_t *tbs, int msg, param_size_t param1, param_size_t param2)
{
	cmd_entry *e = MALLOC_T(cmd_entry);
	e->msg = msg;
	e->param1 = param1;
	e->param2 = param2;
	spinlock_enter(&tbs->cmd_list_lock, -1);
	list_add_tail(&e->entry, &tbs->cmd_list);
	spinlock_leave(&tbs->cmd_list_lock);
	ReleaseSemaphore(tbs->conn_evt[MSG_EVT_IDX], 1, NULL);
}

static unsigned int __stdcall server_proc(void *arg)
{
	sp_tbs_t *tbs = (sp_tbs_t*)arg;
	struct sockaddr_in addr = {0};
	int istop = 0;
	int fixed_conn;

	TOOLKIT_ASSERT(tbs->server_fd == INVALID_SOCKET);

	tbs->server_fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
	if (tbs->server_fd == INVALID_SOCKET) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("create list fd socket failed! %s %d, LastError=%d", _GetFileName(__FILE__), __LINE__, WSAGetLastError());
		tbs->ready_evt_result = Error_Resource;
		goto on_error;
	}
	{
		long val = 1;
		setsockopt(tbs->server_fd, SOL_SOCKET, SO_REUSEADDR, (char*)&val, sizeof(val));
	}
	addr.sin_family = AF_INET;
	addr.sin_addr.s_addr = tbs->server_ip;
	addr.sin_port = tbs->server_port;
	if (bind(tbs->server_fd, (struct sockaddr*)&addr, sizeof(addr)) != 0) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("bind address failed! %s %d, LastError=%d", _GetFileName(__FILE__), __LINE__, WSAGetLastError());
		tbs->ready_evt_result = Error_AlreadyExist;
		goto on_error;
	}
	if (listen(tbs->server_fd, 5) != 0) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("winsock::listen failed! %s %d, LastError=%d", _GetFileName(__FILE__), __LINE__, WSAGetLastError());
		tbs->ready_evt_result = Error_AlreadyExist;
		goto on_error;
	}

	TOOLKIT_ASSERT(tbs->conn_evt[SRV_EVT_IDX] == NULL);
	tbs->conn_evt[SRV_EVT_IDX] = WSACreateEvent();
	WSAEventSelect(tbs->server_fd, tbs->conn_evt[SRV_EVT_IDX], FD_ACCEPT | FD_CLOSE);
	tbs->conn_cnt++;

	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("start server ok!");
	tbs->ready_evt_result = 0;
	SetEvent(tbs->ready_evt);

	fixed_conn = tbs->conn_cnt;

	while (!istop || tbs->conn_cnt > fixed_conn) {
		DWORD evt_cnt = (DWORD)tbs->conn_cnt;
		DWORD dwRet = WaitForMultipleObjects(evt_cnt, &tbs->conn_evt[0], FALSE, MAX_TIMEOUT);
		if (dwRet == WAIT_TIMEOUT) {
			continue;
		} else if (dwRet == WAIT_OBJECT_0+MSG_EVT_IDX) { // cmd
			cmd_entry *e;
			spinlock_enter(&tbs->cmd_list_lock, -1);
			e = list_first_entry(&tbs->cmd_list, cmd_entry, entry);
			list_del(&e->entry);
			spinlock_leave(&tbs->cmd_list_lock);
			switch (e->msg) {
			case MSG_STOP:
				{
					on_stop(tbs); // ...stop
					istop++;
				}
				break;
			case MSG_UAC_ON_CONNECT:
				{
					sub_session *session = (sub_session*)e->param1;
					int error = e->param2;
					uac_on_connect(tbs, session->conn, session, error);
				}
				break;
			case MSG_UAC_ON_DESTROY:
				{
					sub_session *session = (sub_session*)e->param1;
					uac_on_destroy(tbs, session->conn, session);
				}
				break;
			case MSG_UAC_ON_CLOSE:
				{
					sub_session *session = (sub_session*)e->param1;
					int error = e->param2;
					uac_on_close(tbs, session->conn, session, error);
				}
				break;
			case MSG_UAC_ON_ANS:
				{
					sub_session *session = (sub_session*)e->param1;
					iobuffer_t *ans_pkt = (iobuffer_t*)e->param2;
					int tsx_id;
					int error;
					int end;
					int user_error;
					char* msg_str = NULL;
					iobuffer_format_read(ans_pkt, "4444s", &tsx_id, &error, &user_error, &end, &msg_str);
					uac_on_ans(tbs, session->conn, session, tsx_id, error, user_error, msg_str, end, &ans_pkt);
					if (ans_pkt)
						iobuffer_dec_ref(ans_pkt);
					if (msg_str)
						free(msg_str);
				}
				break;
			case MSG_ON_EVENT:
				{
					reg_entry *entry = (reg_entry*)e->param1;
					iobuffer_t *evt_pkt = (iobuffer_t *)e->param2;
					post_event(tbs, entry, 0, entry->register_id, &evt_pkt);
					if (evt_pkt)
						iobuffer_dec_ref(evt_pkt);
				}
				break;
			default:
				DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("unknown msg type! %s %d", _GetFileName(__FILE__), __LINE__);
				TOOLKIT_ASSERT(0);
				break;
			}
			free(e);
		} else if (dwRet == WAIT_OBJECT_0 + SRV_EVT_IDX) { // 
			WSANETWORKEVENTS netevents;
			if (WSAEnumNetworkEvents(tbs->server_fd, tbs->conn_evt[SRV_EVT_IDX], &netevents) != SOCKET_ERROR) {
				if (netevents.lNetworkEvents & FD_ACCEPT) {
					if (netevents.iErrorCode[FD_ACCEPT_BIT] == 0) {
						DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("FD_ACCEPT trigger!");
						on_accept(tbs);
					} else {
						DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("listen accept error bit! %s, %d", _GetFileName(__FILE__), __LINE__);
					}
				}
				if (netevents.lNetworkEvents & FD_CLOSE) {
					DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("listen socket closed detected! %s, %d", _GetFileName(__FILE__), __LINE__);
					break;
				}
			} else {
				DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("WSAEnumNetworkEvents failed, LastError=%d", WSAGetLastError());
			}
		} else if (dwRet < WAIT_OBJECT_0 + evt_cnt) {
			WSANETWORKEVENTS netevents;
			int idx = dwRet	- WAIT_OBJECT_0;
			sock_connection *conn = tbs->conn[idx];
			TOOLKIT_ASSERT(conn);
			if (WSAEnumNetworkEvents(conn->fd, tbs->conn_evt[idx], &netevents) != SOCKET_ERROR) {
				if (netevents.lNetworkEvents & FD_READ) {
					if (netevents.iErrorCode[FD_READ_BIT] == 0) {
						on_read(tbs, conn);
					}
				}
				if (netevents.lNetworkEvents & FD_WRITE) {
					if (netevents.iErrorCode[FD_WRITE_BIT] == 0) {
						on_write(tbs, conn);
					}
				}
				if (netevents.lNetworkEvents & FD_CLOSE) {
					on_close(tbs, conn);
				}
			}
		} else {
			DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("unexpected dwRet! %s %d", _GetFileName(__FILE__), __LINE__);
			break;
		}
	}

	DbgWithLink(LOG_LEVEL_INFO, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("tbs server thread exit!");

on_error:
	if (tbs->server_fd != INVALID_SOCKET) {
		if (tbs->conn_evt[SRV_EVT_IDX])
			WSAEventSelect(tbs->server_fd, tbs->conn_evt[SRV_EVT_IDX], 0);
		closesocket(tbs->server_fd);
		tbs->server_fd = INVALID_SOCKET;
	}
	if (tbs->conn_evt[SRV_EVT_IDX]) {
		WSACloseEvent(tbs->conn_evt[SRV_EVT_IDX]);
		tbs->conn_evt[SRV_EVT_IDX] = NULL;
		tbs->conn_cnt--;
	}
	if (tbs->ready_evt_result) {
		SetEvent(tbs->ready_evt);
	}

	return 0;
}

int sp_tbs_create(sp_ses_mgr_t *ses_mgr, const char *ipaddr, unsigned short port, sp_tbs_t **p_tbs)
{
	sp_tbs_t *tbs;
	sp_svc_t *svc = sp_ses_mgr_get_svc(ses_mgr);

	TOOLKIT_ASSERT(ipaddr);
	TOOLKIT_ASSERT(ses_mgr);

	tbs = ZALLOC_T(sp_tbs_t);

	tbs->conn_evt[0] = CreateSemaphoreA(NULL, 0, 0x7fffffff, NULL);
	tbs->ready_evt = CreateEventA(NULL, TRUE, FALSE, NULL);
	sp_log_client_create(svc, sp_svc_get_iom(svc), &tbs->log_client);
	tbs->conn_cnt = 1;
	tbs->server_fd = INVALID_SOCKET;
	tbs->server_ip = inet_addr(ipaddr);
	tbs->server_port = htons(port);
	tbs->sub_session_seq = (unsigned int)GetTickCount();
	INIT_LIST_HEAD(&tbs->cmd_list);
	spinlock_init(&tbs->cmd_list_lock);
	tbs->ses_mgr = ses_mgr;

	sp_var_client_create(svc, &tbs->var_client);

	*p_tbs = tbs;

	return 0;
}

int sp_tbs_start(sp_tbs_t *tbs)
{
	if (tbs->work_thread) {
		DbgWithLink(LOG_LEVEL_WARN, LOG_TYPE_SYSTEM).setAPI(__FUNCTION__)("may be already started! %s %d", _GetFileName(__FILE__), __LINE__);
		return Error_Duplication;
	}

	tbs->ready_evt_result = 0;
	ResetEvent(tbs->ready_evt);
	tbs->work_thread = (HANDLE)_beginthreadex(NULL, 0, &server_proc, tbs, 0, (unsigned*)&tbs->work_thread_id);
	if (!tbs->work_thread) {
		return Error_Resource;
	}

	WaitForSingleObject(tbs->ready_evt, INFINITE);
	if (tbs->ready_evt_result) {
		CloseHandle(tbs->work_thread);
		tbs->work_thread = NULL;
	}

	return tbs->ready_evt_result;
}

void sp_tbs_stop(sp_tbs_t *tbs)
{
	TOOLKIT_ASSERT(tbs->work_thread);

	post_msg(tbs, MSG_STOP, 0, 0);

	WaitForSingleObject(tbs->work_thread, INFINITE);
	CloseHandle(tbs->work_thread);
	tbs->work_thread = NULL;
}

void sp_tbs_destroy(sp_tbs_t *tbs)
{
	TOOLKIT_ASSERT(tbs->conn_cnt == 1);
	TOOLKIT_ASSERT(tbs->server_fd == INVALID_SOCKET);
	CloseHandle(tbs->conn_evt[0]);
	CloseHandle(tbs->ready_evt);
	sp_log_client_destroy(tbs->log_client);
	sp_var_client_destroy(tbs->var_client);
	free(tbs);
}