/* Processed by ecpg (15.18 (Debian 15.18-0+deb12u1)) */
/* These include files are added by the preprocessor */
#include <ecpglib.h>
#include <ecpgerrno.h>
#include <sqlca.h>
/* End of automatic include section */

#line 1 "app/online/mg_ol_0029.pgc"
/* @tier easy @module mg @transform msg-gateway-online */
/*
 * mg_ol_0029.pgc - 전문게이트웨이 전문 트레일러 생성 서비스 (MG_OL_0029)  [tier=easy]
 *
 * 전문 본문(RAWMSG) 전체 바이트에 대해 XOR LRC(종방향 중복검사) 체크섬을
 * 계산하여 전송 트레일러 필드를 생성한다. LRC 를 2자리 hex 트레일러로
 * 구성해 응답한다. (순수 계산 로직 - DB 접근 없음)
 */
#include <stdio.h>
#include <string.h>

#include "txcore.h"
#include "txcore_dbio.h"
#include "acq_util.h"
#include "mg_core.h"


#line 1 "/usr/include/postgresql/sqlca.h"
#ifndef POSTGRES_SQLCA_H
#define POSTGRES_SQLCA_H

#ifndef PGDLLIMPORT
#if  defined(WIN32) || defined(__CYGWIN__)
#define PGDLLIMPORT __declspec (dllimport)
#else
#define PGDLLIMPORT
#endif							/* __CYGWIN__ */
#endif							/* PGDLLIMPORT */

#define SQLERRMC_LEN	150

#ifdef __cplusplus
extern "C"
{
#endif

struct sqlca_t
{
	char		sqlcaid[8];
	long		sqlabc;
	long		sqlcode;
	struct
	{
		int			sqlerrml;
		char		sqlerrmc[SQLERRMC_LEN];
	}			sqlerrm;
	char		sqlerrp[8];
	long		sqlerrd[6];
	/* Element 0: empty						*/
	/* 1: OID of processed tuple if applicable			*/
	/* 2: number of rows processed				*/
	/* after an INSERT, UPDATE or				*/
	/* DELETE statement					*/
	/* 3: empty						*/
	/* 4: empty						*/
	/* 5: empty						*/
	char		sqlwarn[8];
	/* Element 0: set to 'W' if at least one other is 'W'	*/
	/* 1: if 'W' at least one character string		*/
	/* value was truncated when it was			*/
	/* stored into a host variable.             */

	/*
	 * 2: if 'W' a (hopefully) non-fatal notice occurred
	 */	/* 3: empty */
	/* 4: empty						*/
	/* 5: empty						*/
	/* 6: empty						*/
	/* 7: empty						*/

	char		sqlstate[5];
};

struct sqlca_t *ECPGget_sqlca(void);

#ifndef POSTGRES_ECPG_INTERNAL
#define sqlca (*ECPGget_sqlca())
#endif

#ifdef __cplusplus
}
#endif

#endif

#line 17 "app/online/mg_ol_0029.pgc"


/* 바이트열 XOR LRC 계산 (초기값 0) */
static unsigned char lrc_xor(const char *buf, int len)
{
    unsigned char lrc = 0;
    int i;

    for (i = 0; i < len; i++)
        lrc ^= (unsigned char)buf[i];
    return lrc;
}

TX_SERVICE(MG_OL_0029, ctx)
{
    char raw[512];
    char trailer[3];
    static const char HX[] = "0123456789ABCDEF";
    unsigned char lrc;
    int  rawlen;

    tx_log(TX_LOG_INFO, "[MG_OL_0029] 전문 트레일러 생성 서비스 진입");

    /* 1) 트레일러 대상 본문 수신 */
    rawlen = tx_buf_get(ctx->in, "RAWMSG", raw, sizeof(raw));
    if (rawlen <= 0) {
        tx_log(TX_LOG_ERROR, "[MG_OL_0029] 원시전문(RAWMSG) 누락");
        tx_return(ctx, TX_EINVAL, ctx->out);
        return;
    }
    rawlen = (int)strlen(raw);

    /* 2) XOR LRC 체크섬 계산 */
    lrc = lrc_xor(raw, rawlen);

    /* 3) 2자리 hex 트레일러 구성 */
    trailer[0] = HX[(lrc >> 4) & 0x0f];
    trailer[1] = HX[lrc & 0x0f];
    trailer[2] = '\0';

    /* 4) 체크섬/트레일러 응답 */
    tx_buf_reset(ctx->out);
    tx_buf_sets(ctx->out, "RESP", RESP_OK);
    tx_buf_setlong(ctx->out, "BODYLEN", (long)rawlen);
    tx_buf_setlong(ctx->out, "LRC", (long)lrc);
    tx_buf_sets(ctx->out, "TRAILER", trailer);

    /* 트레일러(LRC) 생성 이력(mg_lrc_log)을 임베디드 SQL 로 적재 */
    {
        /* exec sql begin declare section */
         
         
         
        
#line 67 "app/online/mg_ol_0029.pgc"
 long h_lrc_bodylen ;
 
#line 68 "app/online/mg_ol_0029.pgc"
 long h_lrc_value ;
 
#line 69 "app/online/mg_ol_0029.pgc"
 char h_lrc_trailer [ 3 ] ;
/* exec sql end declare section */
#line 70 "app/online/mg_ol_0029.pgc"


        h_lrc_bodylen = (long)rawlen;
        h_lrc_value   = (long)lrc;
        strncpy(h_lrc_trailer, trailer, sizeof(h_lrc_trailer) - 1);
        h_lrc_trailer[sizeof(h_lrc_trailer) - 1] = '\0';

        if (tx_begin() == TX_OK) {
            { ECPGdo(__LINE__, 0, 1, NULL, 0, ECPGst_normal, "insert into mg_lrc_log ( body_len , lrc_value , trailer_hex ) values ( $1  , $2  , $3  )", 
	ECPGt_long,&(h_lrc_bodylen),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
	ECPGt_long,&(h_lrc_value),(long)1,(long)1,sizeof(long), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, 
	ECPGt_char,(h_lrc_trailer),(long)3,(long)1,(3)*sizeof(char), 
	ECPGt_NO_INDICATOR, NULL , 0L, 0L, 0L, ECPGt_EOIT, ECPGt_EORT);}
#line 80 "app/online/mg_ol_0029.pgc"

            if (sqlca.sqlcode != TX_SQL_OK) {
                TX_DBIO_LOG_ERR("INSERT mg_lrc_log");
                tx_abort();
            } else {
                tx_commit();
            }
        }
    }

    tx_log(TX_LOG_INFO, "[MG_OL_0029] 트레일러 생성완료 len=%d lrc=%02X",
           rawlen, lrc);
    tx_return(ctx, TX_OK, ctx->out);
}
