cdmatcap.c

<B>CDMA的MAP协议及以下层协议的解析

#include "stdlib.h"
#include "asn1.h"
#include "CDMA_ext.h"
#include "CDMAtcap.h"

#include "ss7Msg.h"
#include "simslog.h"

#include "CDMA_tcap_def.c"
#include "CDMA_tcap_def.h"
#include "CDMA_map_def.c"
#include "CDMA_map_def.h"
#include "CDMA_pos.h"

int DecodeOperationEle(unsigned char *msgbuf, int msglen, int *msgptr, TYPE_DECODE_DEF *typeDecodeDef,
                       ELEMENT_DEF *elementDef, DECODED_ELEMENT *decodedMsg,
                       DECODE_CONTEXT *context, int *curPos)
{
    context->op = decodedMsg[*curPos].u.strVal[1];
	return 0;
}

int DecodeOpArgList(unsigned char *msgbuf, int msglen, int *msgptr, TYPE_DECODE_DEF *typeDecodeDef,
                    ELEMENT_DEF *elementDef, DECODED_ELEMENT *decodedMsg,
                    DECODE_CONTEXT *context, int *curPos, ARG_LIST *argList)
{

	for (; argList->op != END_PARA; argList++) {
		if (argList->op == context->op)	{
			if(!argList->opArgs) { return -1; }
			else {
				/* the following is modified by fanyonggang */
			   if( argList->opArgs->type == -1 ) { return 0;}
			   else 
			   	 return typeDecodeDef[argList->opArgs->type].decodeFunc(msgbuf, msglen, msgptr, typeDecodeDef,
			   		argList->opArgs, decodedUsrPartMsg, context, &usrPartcurPos);
			}
		}
	}
   return 0;
}

/* 解码函数：Invoke类型Op的Parameter，是一个ANY类型，DEPENDS ON Operation和SSN */
int DecodeCdmaInvokeParameterEle (unsigned char *msgbuf, int msglen, int *msgptr, TYPE_DECODE_DEF *typeDecodeDef,
                              ELEMENT_DEF *elementDef, DECODED_ELEMENT *decodedMsg,
                              DECODE_CONTEXT *context, int *curPos)
{
	int result;
	int pos=0;
	TYPE_DECODE_DEF cdmaTypeDecodeDef[]= { CDMA_EXT_TYPE_DECODE_DEF};

	int ormsgptr = *msgptr;

	pos = posIndex[CDMA_POS_OPCODE];

	if(pos <= 0)  return 0;
	

	DecodeOperationEle(msgbuf, msglen, &ormsgptr, typeDecodeDef, elementDef, decodedMsg, context, &pos);
	
	result = DecodeOpArgList(msgbuf, msglen, msgptr, cdmaTypeDecodeDef,
			elementDef, decodedTCAPMsg, context, curPos, CDMA_REQ_OP_ARRAY);	

	return 1;
}

/* 解码函数：Result类型Op的Parameter，是一个ANY类型，DEPENDS ON Operation和SSN */
int DecodeCdmaResultParameterEle (unsigned char *msgbuf, int msglen, int *msgptr, TYPE_DECODE_DEF *typeDecodeDef,
                              ELEMENT_DEF *elementDef, DECODED_ELEMENT *decodedMsg,
                              DECODE_CONTEXT *context, int *curPos)
{

	TYPE_DECODE_DEF cdmaTypeDecodeDef[]= { CDMA_EXT_TYPE_DECODE_DEF};

    return DecodeChoiceEle (msgbuf, msglen, msgptr, cdmaTypeDecodeDef, CDMA_Reponse_Param_Arg, 
    			                decodedUsrPartMsg, context, &usrPartcurPos);	    			               
	
}

/*
 * @ func: DecodeTcapMsg
 * @ note: decodedTCAPMsg 和 decodedMapMsg 中 第一个位置（即索引号为0的地方用于解码无此参数指针项）
 * @ param: context 解码上下文，其中的参数来自SCCP层解码结果
 * @ param: msgbuf 原始信令存储位置指针
 * @ param: msglen 原始信令MSU长度
 * @ param: msgptr 当前解码位置指针
 * @ return: 1为正常， 其他异常
 */
 
int DecodeCdmaTcapMsg(unsigned char *msgbuf, int msglen, int *msgptr, DECODE_CONTEXT *context)
{
	int i, ret;
	
	TYPE_DECODE_DEF CdmaTcapTypeDecodeDef[] = { CDMA_TCAP_TYPE_DECODE_DEF } ;	
		
	for(i=0;i<MAX_POS_INDEX;i++) posIndex[i]=0;
		
	tcapcurPos=1; usrPartcurPos=1; 	
    
	ret =  DecodeASN1(msgbuf, msglen, msgptr, CdmaTcapTypeDecodeDef, cdma_tcap_ElementDef,
		decodedTCAPMsg, context, &tcapcurPos) ; 
				
	return ret;
	
}