echo.cpp

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#include <windows.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <nb30.h>
#pragma comment(lib,"netapi32.lib")
#define MAXSESSIONS 2
#define MAXNAMES 4
/*
struct message{
	int name;
	char msg[10];
}message2;*/

UCHAR LanaEnum(LANA_ENUM *lenum)
{
	NCB ncb;
	UCHAR ucRc;
	memset(&ncb,0,sizeof(NCB));
	ncb.ncb_command=NCBENUM;
	ncb.ncb_buffer=(PUCHAR)lenum;
	ncb.ncb_length=sizeof(LANA_ENUM);
	ucRc=Netbios(&ncb);
	return(ucRc);
}

UCHAR RestNCB(UCHAR lana)
{
	NCB ncb;
	UCHAR ucRc;
	memset(&ncb,0,sizeof(NCB));
	ncb.ncb_command=NCBRESET;
	ncb.ncb_callname[0]=MAXSESSIONS;
	ncb.ncb_callname[2]=MAXNAMES;
//	ncb.ncb_callname[3]=TRUE;
	ncb.ncb_lana_num=lana;
	ucRc=Netbios(&ncb);
	return(ucRc);
}

UCHAR AddName(CHAR *Name,UCHAR Lana,UCHAR *NameNum)
{
	NCB ncb;
	memset(&ncb,0,sizeof(NCB));
	ncb.ncb_command=NCBADDNAME;
	ncb.ncb_lana_num=Lana;
	strcpy((char*)ncb.ncb_name,(const char*)Name);	
	Netbios(&ncb);
	*NameNum=ncb.ncb_num;
	return(ncb.ncb_cmd_cplt);
}


UCHAR DeleteName(UCHAR *Name,UCHAR Lana)
{
	NCB ncb;
	memset(&ncb,0,sizeof(NCB));
	ncb.ncb_command=NCBDELNAME;
	ncb.ncb_lana_num=Lana;
	strcpy((char*)ncb.ncb_name,(const char*)Name);
	Netbios(&ncb);
	return(ncb.ncb_cmd_cplt);
}


UCHAR SendechoMessage(PNCB pncb,UCHAR Num,UCHAR *pBuffer,WORD Length,UCHAR Lana)
{
	memset(pncb,0,sizeof(NCB));
	pncb->ncb_command=NCBDGSENDBC;
	pncb->ncb_lana_num=Lana;
	pncb->ncb_num=Num;
	pncb->ncb_buffer=pBuffer;
	pncb->ncb_length=Length;
	Netbios(pncb);
	return(pncb->ncb_cmd_cplt);
}

UCHAR RecvMessage(PNCB pncb,UCHAR Num,UCHAR *pBuffer,WORD Length,UCHAR Lana)
{
	memset(pncb,0,sizeof(NCB));
	pncb->ncb_command=NCBDGRECV;
	pncb->ncb_lana_num=Lana;
	pncb->ncb_num=Num;
	pncb->ncb_buffer=pBuffer;
	pncb->ncb_length=Length;
	Netbios(pncb);
	return(pncb->ncb_cmd_cplt);
}


void main()
{
	NCB ServerNcb;
	CHAR ServerName[16];
	UCHAR ServerNameNum;
	UCHAR buff[512];
	LANA_ENUM lenum;
	if(LanaEnum(&lenum)!=NRC_GOODRET)
	{
		printf("lanaEnum Error!\n");
		return;
	}
//	printf("LanaEnum OK!\n");

	if(RestNCB(lenum.lana[0])!=NRC_GOODRET)
	{
		printf("RestNCB Error!\n");
		return;
	}
 //   printf("RestNCB OK!\n");	


	strcpy(ServerName,"swandive1");

	
	if((AddName(ServerName,lenum.lana[0],&ServerNameNum)))
	{
		printf("AddName Error!\n");
		return;
	}
	printf("Just a wait!\n");

	UCHAR p[30];
    UCHAR w[17]="echo!-";
	UCHAR z[10]="welcome: ";


	for(;;)
	{
		memset(buff,0,512);
		printf("wait for time request...\n");
		if(RecvMessage(&ServerNcb,ServerNameNum,(UCHAR *)p,sizeof(p),lenum.lana[0])!=NRC_GOODRET)
		{
			printf("Wait Error!\n");
			return;
		}     	
		if(ServerNcb.ncb_cmd_cplt==0)
		{	
			int count=0;
			for(int i=0;i<sizeof(p);i++)
				if(p[i]<=122&&p[i]>=65)
					count++;
				int t=p[count];
		    for(int j=0;j<count;j++)
					w[j+6]=p[j];
			for(int x=0;x<9;x++)
				w[count+6+x]=z[x];
			w[count+15]=(UCHAR)t;
			w[count+16]='\0';
			strcpy((char *)p,(const char*)w);
			printf("%s\n",p);
			printf("%d\n",p[count+15]);






			if(SendechoMessage(&ServerNcb,ServerNameNum,(UCHAR *)p,sizeof(p),lenum.lana[0])!=NRC_GOODRET)
			{
				printf("SendEchoMessage Error!\n");
				return;
			}
			printf("SendEchoMessage ok!\n");
			printf("OK\n");
		}
	}
}