ap/app/include/at_utils.h

/**
 * @file at_utils.h
 * @brief Ìṩ¸øÓ¦ÓÃʹÓõÄsoftapƽ̨¹«¹²½Ó¿Ú
 *
 * Copyright (C) 2017 Sanechips Technology Co., Ltd.
 * @author
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */
#ifndef __AT_UTILS_H__
#define __AT_UTILS_H__
#include "os_type_def.h"
#include "softap_api.h"

/*******************************************************************************
 *                             Type definitions                                *
 ******************************************************************************/


/*******************************************************************************
 *                       Global function declarations                          *
 ******************************************************************************/
/**
 * @brief ¶¨ÒåATÉÏÏÂÎĵ±Ç°´¦ÀíµÄ״̬»ú£¬ÒÔ¾ö¶¨ÏÂÒ»²½´¦Àí
 * @param AT_END          ATÁ÷³Ì½áÊø£¬¿Í»§¶Ë¿ÉÒÔÏòÉϲãapp·¢ËÍÏìÓ¦ÏûÏ¢£¬·þÎñ¶ËÐèÒªÏòatͨµÀ·¢ËÍatÏìÓ¦ÃüÁî
 * @param AT_CONTINUE     AT½»»¥Á÷³Ì¼ÌÐø
 * @param AT_END_AND_MSG  ÓÃÓÚ·þÎñ¶ËÊÕµ½ATÇëÇóºó£¬Á¢¼´»Ø¸´OK½á¹ûÂ룬ͬʱ»¹Ðè·¢ËÍÏûÏ¢¸ø·þÎñ¶ËAPP
 * @param AT_STATE_MAX    ÉÏÏÞºê
 */
#ifndef DOXYGEN_SHOULD_SKIP_THIS
enum at_context_state {
	AT_END = 0, //ATÁ÷³Ì½áÊø£¬¿Í»§¶Ë¿ÉÒÔÏòÉϲãapp·¢ËÍÏìÓ¦ÏûÏ¢£¬·þÎñ¶ËÐèÒªÏòatͨµÀ·¢ËÍatÏìÓ¦ÃüÁî
	AT_CONTINUE,//AT½»»¥Á÷³Ì¼ÌÐø
	AT_END_AND_MSG,//ÓÃÓÚ·þÎñ¶ËÊÕµ½ATÇëÇóºó£¬Á¢¼´»Ø¸´OK½á¹ûÂ룬ͬʱ»¹Ðè·¢ËÍÏûÏ¢¸ø·þÎñ¶ËAPP
	AT_WAIT_AUTO,//ÓÃÓÚÊÕµ½Ó¦´ðºó£¬ÉÐδ»ñÈ¡µ½ÏëÒªµÄÖ÷¶¯Éϱ¨Ê±£¬·µ»Ø¸ÃÖµ£»Ä¿Ç°½öÓÃÓÚPDP¼¤»îµÄzgipdnsÖ÷¶¯Éϱ¨³ÙÓÚOKºóÉϱ¨µÄÇé¿ö
	AT_STATE_MAX,//ÉÏÏÞºê
};
#endif

/**
 * @brief ´¦Àí×÷Ϊ·þÎñ¶ËµÄÊÕµ½µÄÇëÇóÃüÁî¡£¶ÔÓÚat_ctl±¾µØµÄ·þÎñ¶Ë£¬ÊÕµ½ÇëÇóÖ®ºó£¬×÷Ϊͬ²½´¦Àí·½Ê½Ö±½ÓÔڸú¯ÊýÖд¦Àí£¬²¢·µ»Øok
 *¶ÔÓÚDEMO·þÎñ¶Ë(¿Í»§¶þ´Î¿ª·¢×¢²áµÄ·þÎñ¶Ë)ÊÕµ½µÄÇëÇ󣬱ØÐëͨ¹ýÒì²½ÏûÏ¢µÄ·½Ê½£¬ÓÉDEMOµÄAPP·þÎñ¶Ëͨ¹ýÏûÏ¢½øÐÐÓ¦´ð
 * @param at_fd 		 ½ÓÊÕATÃüÁîµÄͨµÀ
 * @param at_paras		 ATÃüÁî²ÎÊý
 * @param res_msg		 ÈôΪͬ²½´¦Àí·½Ê½£¬res_msgΪ»Ø¸´µÄ½á¹ûÂ룻ÈôΪÒì²½´¦Àí·½Ê½£¬res_msgΪATÃüÁîת»»ºóµÄÏûÏ¢½á¹¹Ìå
 * @param res_msglen	 ²ÎÊýres_msgµÄ³¤¶È
 * @return intÐͽá¹ûÂë   ·µ»Øenum at_context_stateö¾ÙÖµ£¬AT_END±íʾͬ²½Ó¦´ð·½Ê½£»AT_CONTINUE±íʾÒì²½Ó¦´ð·½Ê½,ÓÉ¿ò¼Ü¾ö¶¨ÏÂÒ»²½´¦Àí
 * @note ¿É²Î¿¼Ê¾Àý´úÂë: user_regist.c
 */
typedef int (*ser_req_func2)(int at_fd, char *at_paras, void ** res_msg, int *res_msglen);


/**
 * @brief ·þÎñ¶ËAPP·¢Ë͵ÄÓ¦´ðÏûÏ¢µÄATÃüÁî·â×°£¬×îÖÕ×é×°³ÉATÓ¦´ðÃüÁîºó£¬´Óat_fdͨµÀ·¢Ë͸øÔ¶¶Ë¿Í»§¶Ë
 * @param rsp_msg		 APP·¢Ë͵ÄÓ¦´ðÏûÏ¢ÄÚÈÝ
 * @param ret			 ATÃüÁî
 * @param retlen		 ATÃüÁ¶È
 * @return intÐͽá¹ûÂë   ·µ»Øenum at_context_stateö¾ÙÖµ
 * @note ¿É²Î¿¼Ê¾Àý´úÂë: user_regist.c
 */
typedef int (*app_rsp_proc)(void *rsp_msg, void**ret, int *retlen);

/**
 * @brief ¶ÔÓÚÉϱ¨atÃüÁî´¦Àíº¯Êý£¬°üº¬²éѯÖмä½á¹ûºÍÖ÷¶¯Éϱ¨µÄatÃüÁî´¦Àí
 *	¶ÔÓÚpsÏà¹ØµÄÖ÷¶¯Éϱ¨ºÍ²éѯÖмä½á¹ûÉϱ¨£¬Ò»°ãÎÞÐ轫Éϱ¨ÄÚÈÝ·¢Ë͸øÆäËûÄ£¿éÓ¦Óã¬Òò´Ë¾¡Á¿Ê¹ÓÃnvºÍÈ«¾Ö±äÁ¿µÄ·½Ê½´æ·Å
 *	¶ÔÓÚÀ©Õ¹atµÄÖмä½á¹ûÉϱ¨£¬Ò»°ãÐèÒª½«²éѯ½á¹û·¢Ë͸øÆäËûÄ£¿éÓ¦Ó㬶¯Ì¬ÉêÇëÄڴ棬·ÅÔÚcontextÉÏÏÂÎÄÖеÄapp_para±äÁ¿ÖÐ
 * @param at_paras	ATÃüÁî×Ö·û´®
 * @return charÐÍ×Ö·û´®£¬±íʾת»»ºóµÄatÃüÁî²ÎÊý
 * @note
 * at_paraÖ¸ÏòÈ¥µôATÃüÁîÍ·²¿ºóµÄµÚÒ»¸ö×Ö·û£¬¼´¡®£º¡¯
 * ·µ»ØµÄATÃüÁîÒ²ÊÇ': '¿ªÍ·µÄATÃüÁî²ÎÊý£¬ 
 * Àý£º+CSQ: <rssi>,<ber>,<act>, at_paraΪ: <rssi>,<ber>,<act>, ·µ»Ø: <rssi>,<ber>
 */

typedef char * (*format_inform_func)(char *at_paras);


/**
 * @brief Éú³Éat¶¯×÷ÇëÇóÃüÁî
 * @param cmd	 ATÃüÁîÇëÇóÃû³Æ
 * @param param  ATÃüÁîÇëÇó²ÎÊý
 * @return at¶¯×÷ÇëÇó×Ö·û´®µÄÖ¸Õë
 * @note ÓÉat_ctl¸ºÔðÊÍ·ÅÄÚ´æ
 */
char* at_act_build(char* cmd, char* param);

/**
 * @brief Éú³Éat²éѯÇëÇóÃüÁî
 * @param cmd	ATÃüÁîÇëÇóÃû³Æ
 * @return at²éѯÇëÇó×Ö·û´®µÄÖ¸Õë
 * @note ÓÉat_ctl¸ºÔðÊÍ·ÅÄÚ´æ
 */
char* at_query_build(char* cmd);


/**
 * @brief  Éú³Éat²éѯÇëÇóÃüÁîµÄÏìÓ¦ÃüÁµ±ÓÐÖмä½á¹ûÉϱ¨Ê±£¬ÔÚser_ops_t2µÄrsp_actµ÷Óã¬
 * ¸Ãº¯ÊýÖн«ÖмäÉϱ¨½á¹ûºÍokatÃüÁî×é×°ÔÚÒ»Æð£¬Í¨¹ýmallocÉêÇëʹÓõÄÄڴ棬²¢·µ»Ø
 * ¸ÃÖ¸Õë¸øÍâ²ãµ÷Óú¯ÊýʹÓã¬×îÖÕÓÉÍâ²ãµ÷Óú¯ÊýÊͷŸÃÄÚ´æ
 * @param cmd	ATÃüÁîÏìÓ¦Ãû³Æ
 * @param param  ATÃüÁîÏìÓ¦²ÎÊý
 * @return at¶¯×÷ÏìÓ¦×Ö·û´®µÄÖ¸Õë
 * @note input:  cmd  "xx"   
 *           	param    "yy,zz" 
 *       output:   \r\n+xx:yy,zz\r\n
 */
char* at_query_result_build(char* cmd, char* param);



/**
 * @brief Éú³ÉatÏìÓ¦½á¹ûOKº¯Êý
 * @return atÏìÓ¦½á¹ûOK×Ö·û´®µÄÖ¸Õë
 * @note ÓÉat_ctl¸ºÔðÊÍ·ÅÄÚ´æ
 */
char* at_ok_build();


/**
* @brief atÃüÁî½âÎö
* @param fmt ÿ¸ö²ÎÊýÊä³öµÄÊý¾Ý¸ñʽ
* @param buf ԭʼÊý¾Ý
* @param pval Êä³ö¸ñʽ»¯ºóÊý¾ÝÖµ
* @return ¿ÉÒÔÕýÈ·½âÎö²ÎÊýµÄ¸öÊý
* @note ¸ñʽ½öÖ§³Ö%dºÍ%s,ͬʱ¿ÉÒÔÔÚÿ¸ö¸ñʽǰ¼ÓÉÏÊý×ÖÒÔÖ¸¶¨
	 ±äÁ¿¿ÉÒÔ¸³ÖµµÄ¿Õ¼ä´óС£¬µ¥Î»Îª×Ö½Ú£¬ÀýÈç%2d±íʾ½ÓÊÜ´æ´¢¿Õ¼äΪ2×Ö½Ú£»%5s±íʾËãÉÏ'\0'£¬×î¶à¿ÉÒÔ
	 ½ÓÊÜ5¸ö×Ö·û¡£µ±%d²»Ö¸¶¨Êý×Öʱ£¬°´ÕÕ4×Ö½Ú½øÐи³Öµ£¬%sÔò°´ÕÕʵ¼Ê½âÎöµÄ×Ö·û´®³¤¶ÈÍêÈ«¸³Öµ£¬ÓпÉÄÜ
	 »áÓÐÔ½½ç¡£
*ʾÀý
<pre>
	char buf[]="1,2,\"test\"";
	int n1 = 0;
	int n2 = 0;
	char *n3 = malloc(strlen(buf));
	char *p[] = {&n1,&n2,n3};
	ret = parse_param2("%d,%d,%s", buf, (void**)p);
	//½âÎöºón1==1 n2==2 n3=="test"	 
	ret = parse_param2("%4d,%d,%3s", buf, (void**)p);
	//½âÎöºón1==1 n2==2 n3=="te"	 
	retµÄֵΪ3
</pre>
*/
int parse_param2(char *fmt, char *buf, void **pval);


/**
 * @brief ATÃüÁî½âÎö½Ó¿Ú
 * @param fmt ATÇëÇó»òÏìÓ¦µÄ¸ñʽ»¯·½Ê½
 * @param buf  ATÇëÇó»òÏìÓ¦µÄ×Ö·û´®Ö¸Õë²»º¬Í·²¿ºÍ¿Õ¸ñ
 * @param pval	¸ñʽ»¯ºóµÄATÃüÁî
 * @return 0±íʾ½âÎö²ÎÊýÕý³££¬ÄÚ²¿½øÐÐÑϸñµÄ²ÎÊý¼ì²é£¬°üÀ¨²ÎÊý¸öÊýÒ»ÖÂÐÔ¼ì²é£¬¶ÔÓÚ¿ÉÑ¡²ÎÊý£¬ÐèÒªµ÷ÓÃÕß×ÔÐп¼ÂÇ
 * @note  
 * 1. ½âÎöµÄATÃüÁî±ØÐë°´ÕÕ3GPP27007±ê׼ЭÒ飬²ÎÊýÒÔ¶ººÅ¸ô¿ª£¬×Ö·û´®Ðè´øË«ÒýºÅ£¬·ñÔò»á¶ÏÑÔ
 * 2. ×Ö·û´®½âÎöʱµÄÈë²Î³¤¶È±ØÐë´óÓÚ¿ÉÄܽâ³öµÄ×Ö·û´®³¤¶È£¬·ñÔò»áÔ½½ç
 * 3. ·µ»ØÖµÇë²Î¿¼Ã¶¾Ùenum SAP_ERR£¬º¬¿ÉÑ¡²ÎÊýÒ»ÖÂÐÔ¼ì²é
 * 4. ÈôfmtÖ¸¶¨µÄ²ÎÊýÀàÐͱØÐëÓëpvalÖÐÖ¸ÕëµÄÒ»Ò»¶ÔÓ¦
 * 5. ʾÀý
<pre>
	char buf[]="1,2,\"test\"";
	int n1 = 0;
	int n2 = 0;
	char *n3 = malloc(strlen(buf));
	char *p[] = {&n1,&n2,n3};
	ret = parse_param_safe("%d,%d,%s", buf, (void**)p);
	//½âÎöºón1==1 n2==2 n3=="test"	 
	ret = parse_param_safe("%4d,%d,%3s", buf, (void**)p);
	//½âÎöºón1==1 n2==2 n3=="te"	 
</pre>
 * @warning 
 */
int  parse_param_safe(char *fmt, char *buf, void **pval);


/**
 * @brief Ó¦Ó÷¢ËͶ¯×÷Àà»ò²éѯÀàATÇëÇó¸ø3GPPЭÒéÕ»£¬²¢³¬Ê±µÈ´ý¶¯×÷½á¹û£»×¢Ò⣺¸Ã½Ó¿ÚÖ»ÄÜÓÃÓÚ²éѯºÍÉèÖúÍÖ´ÐÐÇëÇó£¬Í¨¹ýÈë²Î½øÐÐÖмä½á¹ûµÄÄÚ²¿½âÎö´¦Àí£¬²¢ÇÒ
		  ÓÐÖмä½á¹ûÉϱ¨Ê±£¬Ö»Ö§³ÖÒ»ÌõÖмä½á¹ûµÄÉϱ¨½âÎö£»
 * @param req_at  ÇëÇóATÃüÁ´óСдÃô¸Ð£¬±ØÐë´óд
 * @param info_fmt ATÏìÓ¦µÄ¸ñʽ»¯·½Ê½
 * @param pval	¸ñʽ»¯ºóµÄATÏìÓ¦£¬¾ßÌåʹÓòο´parse_param½Ó¿Ú
 * @param safe_parm_check	ָʾÊÇ·ñ¶Ô²ÎÊý¸öÊý½øÐÐÒ»ÖÂÐÔ¼ì²é£¬0±íʾº¬¿ÉÑ¡²ÎÊý£¬²»¶Ô²ÎÊý¸öÊý½øÐмì²é;1±íʾ¶Ô²ÎÊý¸öÊý½øÐÐÑϸñ¼ì²é
 * @param timeout timeout==0 ±íʾÓÀ¾ÃµÈ´ý½á¹ûÂ룬·ñÔòµÈ´ýʱ¼äΪ[timeout]Ãë
 * @return 0±íʾ·µ»Ø³É¹¦£¬ÆäËûÖµ±íʾʧ°Ü´íÎóÂë
 * @note  
 * 1. Óû§Ê¹ÓÃʱ£¬Èô²»ÏëÓɸýӿÚÄÚ²¿½øÐвÎÊýµÄ¸ñʽ»¯½âÎö£¬¿ÉÒÔ½«info_fmt¸³ÖµÎª"%s"£¬pval¸³ÖµÎªchar **pË«Ö¸Õ룬ÕâÑù²ÎÊý½«×÷ΪÕûÌå×Ö·û´®·µ»Ø¸øµ÷ÓÃÕß
 * 2. ¶ÔÓÚZMGL,CPBR, COPS=?µÈÒ»ÌõÇëÇó»áÓжàÌõÖмä½á¹ûÇé¿ö£¬¸Ãº¯Êý²»ÊÊÓÃ
 * 3. ×Ö·û´®½âÎöʱµÄÈë²Î³¤¶È±ØÐë´óÓÚ¿ÉÄܽâ³öµÄ×Ö·û´®³¤¶È£¬·ñÔò»áÔ½½ç
 * 4. µ±´æÔÚÖмäÉϱ¨Ê±£¬pvalºÍinfo_fmt²»Îª¿Õ£»µ±ÎªÖмäÉϱ¨Ê±£¬Á½¸ö±ØÐë½ÔΪ¿Õ
 * 5. pvalºÍinfo_fmtÁ½ÕßҪô¶¼ÎªNULL,Ҫô¶¼²»ÎªNULL£¬²»ÄÜ´æÔÚÆäÖÐÒ»¸öΪNULL£¬ÁíÒ»¸ö²»ÎªNULLµÄÇé¿ö
 * 6. ʾÀý
<pre>
	int ret = 0;
	ret = get_modem_info2("AT+CFUN=1\r", NULL,  NULL);
	//·µ»Ø¼´±íʾִÐгɹ¦

	char *pstr = malloc(50);
	memset(pstr,0,50);
	ret = get_modem_info2("AT+CIMI\r", "%s",  (void**)&pstr,0,10);
	//·µ»Øºópstr==111111111111111

	int n1 = 0;
	int n2 = 0;
	int n3 = 0;
	char *p2[] = {&n1,&n2,&n3};
	ret = get_modem_info2("AT+CCIOTOPT?\r", "%d,%d,%d",	(void**)p2,0,10);
	//+CCIOTOPT: 1,2,3½âÎöºón1==1 n2==2 n3==3
</pre>
 * @warning 
 */
int  get_modem_info2(char *req_at,char *info_fmt,void **pval, int safe_parm_check, int timeout);


/**
 * @brief ÓÃÓÚ¿ª»ú×¢²áËùÓеķþÎñ¶Ë¾ßÌåATÃüÁîʼþ£¬³£ÓÃÓÚÉϲ㼰¿Í»§¶¨ÖÆ£¬²»×¼ÓÃÓÚPSЭÒéÕ»¡£
 * @param at_cmd_prefix  ATÃüÁîǰ׺ָÕë
 * @param module_id 	 Ô´Ä£¿é¶ÓÁÐid
 * @param req_msg_id	 ÇëÇóÏûÏ¢id
 * @param rsp_msg_id	 ÏìÓ¦ÏûÏ¢id
 * @param req_rcv_act	 ÊÕµ½ÇëÇóÏûϢʱµÄ´¦Àíº¯Êý
 * @param rsp_act		 ÊÕµ½ÏìÓ¦½á¹ûʱµÄ´¦Àíº¯Êý
 * @return intÐͽá¹ûÂë
 * @retval ³É¹¦ 0
 * @note ¿É²Î¿¼Ê¾Àý´úÂë: user_regist.c
 */
int  register_serv_func2(char *at_cmd_prefix, int  module_id, int  req_msg_id, int	rsp_msg_id, ser_req_func2 req_rcv_act, app_rsp_proc rsp_act);

/**
 * @brief ×¢²áÉϱ¨ATÃüÁîµÄ¸ñʽ»¯´¦Àíº¯Êý£¬ÍⲿMCU·¢ËÍATÃüÁmodem·µ»ØµÄÖмä½á¹û²»Âú×ãÍⲿMCUµÄ¸ñʽҪÇó£¬
ÐèÒªat_ctl½øÐÐת»»
 * @param at_cmd_prefix  ATÃüÁîǰ׺ָÕë
 * @param inform_act  ½ÓÊÕµ½ATÃüÁîÖмä½á¹ûµÄת»»´¦Àíº¯Êý
 * @return intÐͽá¹ûÂë
 * @retval ³É¹¦ 0
 * @note
 */
int  register_formatInform_func(char *at_cmd_prefix, format_inform_func inform_act);

#ifndef DOXYGEN_SHOULD_SKIP_THIS
/**
 * @brief ¿É´òÓ¡×Ö·û´®×ª»»Îª×Ö½ÚÊý¾Ý £¬È磺
                "C8329BFD0E01" --> {0xC8, 0x32, 0x9B, 0xFD, 0x0E, 0x01}
 * @param pSrc Ô´×Ö·û´®Ö¸Õë
 * @param pDst Ä¿±êÊý¾ÝÖ¸Õë
 * @param nSrcLength Ô´×Ö·û´®³¤¶È
 * @return Ä¿±êÊý¾Ý³¤¶È
 * @note
 * @warning
 */
int string2bytes(const char* pSrc, unsigned char* pDst, int nSrcLength);
/**
 * @brief ×Ö½ÚÊý¾Ýת»»Îª¿É´òÓ¡×Ö·û´® £¬È磺
                     {0xC8, 0x32, 0x9B, 0xFD, 0x0E, 0x01} --> "C8329BFD0E01"
 * @param pSrc Ô´Êý¾ÝÖ¸Õë
 * @param pDst Ä¿±ê×Ö·û´®Ö¸Õë
 * @param nSrcLength Ô´Êý¾Ý³¤¶È
 * @return Ä¿±êÊý¾Ý³¤¶È£»
 * @note
 * @warning
 */
int bytes2string(const unsigned char* pSrc, char* pDst, int nSrcLength);



 /**
  * @brief ÔÚºöÂÔ´óСдµÄÇé¿öÏ£¬±È½ÏÁ½¸öat×Ö·û´®ÊÇ·ñÏàͬ
  * @param dest  Ä¿±ê×Ö·û´®
  * @param source Ô´×Ö·û´®
  * @return 0±íʾÁ½×Ö·û´®ÍêÈ«Ïàͬ£¬Èç¹ûµÚÒ»¸öÈë²Î´óÓÚµÚ¶þ¸öÈë²Î£¬·µ»ØÕýÖµ£¬·ñÔò·µ»Ø¸ºÖµ£»
  * @note
  * @warning 
  */
 int at_strcmp(const char *dest, const char *source);


 /**
  * @brief ÔÚºöÂÔ´óСдµÄÇé¿öÏ£¬±È½ÏÁ½¸öat×Ö·û´®Ç°size³¤¶ÈÊÇ·ñÏàͬ
  * @param dest  Ä¿±ê×Ö·û´®
  * @param source Ô´×Ö·û´®
  * @param size ±È½ÏµÄ×Ö½ÚÊý
  * @return 0±íʾÁ½×Ö·û´®Ç°size³¤¶ÈÍêÈ«Ïàͬ£¬Èç¹ûµÚÒ»¸öÈë²Î´óÓÚµÚ¶þ¸öÈë²Î£¬·µ»ØÕýÖµ£¬·ñÔò·µ»Ø¸ºÖµ£»
  * @note
  * @warning 
  */
 int at_strncmp(const char *dest, const char *source, int size);

  /**
  * @brief ÔÚºöÂÔ´óСдµÄÇé¿öÏ£¬ÔÚsourceÖÐÑ°ÕÒsubstr×Ó´®µÄλÖÃ
  * @param dest  Ä¿±ê×Ö·û´®
  * @param source Ô´×Ö·û´®
  * @return Èç¹ûÕÒµ½£¬Ö±½Ó·µ»ØsubstrÔÚsourceÖеÚÒ»´Î³öÏÖµÄλÖã¬Èç¹ûûÓÐÕÒµ½£¬·µ»ØNULL
  * @note
  * @warning 
  */
 char * at_strstr(const char * source, const char * substr);

 
  //ÓÃÓÚ¼ÆËãÀÛ¼ÓµÄCHECKSUMÖµ
 unsigned short get_chksum(const unsigned char *ptr, unsigned short len);
#endif

#endif