Thread: login script - URGENT!!!

i am in desperate need to be able to log in to a telnet server. i am writing a program in C that acts as a telnet client, which will automatically login.
When i open the tcp connection, the login script appears.
if i write the username to teh socket then it gets to teh password prompt. However, if i just tell it to write the password to teh socket, it puts the password before the password prompt, and after the login.
i need to be able to tell when the word "Password:" is read from teh socket, so that when it does, it can send the password.
please can someone tell me how to do this.
thanks.

i just need a bit of code that will check teh result of telnet_fastread to see if it matches the word "password:", and if it does, then i can continue with telnet_fastwrite...... at teh minute, they are all sending at teh same time, and i dont know how to wait for a certain word....

so far i have:

Code:

#define MY_IP_ADDRESS   "192.168.14.101"
#define MY_NETMASK      "255.255.255.0"
#define MY_GATEWAY		"192.168.14.254"
#define MY_NAMESERVER	"192.168.14.254"

#define SERIAL_PORT_SPEED 115200
//#undef TELNET_COOKED
#define TELNET_COOKED
#define SERVER_PORT	23
#define REMOTE_HOST "192.168.14.120"

#define  CONNECT_TIMEOUT	10


void delay (long mdelay)
{
	for (; mdelay>0; mdelay--);
}

void mdelay (long sd)
{
	unsigned long t1;

	t1=MS_TIMER;
	for (t1=MS_TIMER; MS_TIMER<(sd+t1); );
}




#memmap xmem
#use "dcrtcp.lib"
#use "vserial.lib"


// The structure that holds a message and the destination
typedef struct {
	char *login;
	char *pass;
	char *command;
} Message;

main()
{
		tcp_Socket 		sock;
		_TelnetCooker 	cooker;
		char 				s[81];
		char 				*p;
		char				*q;
		char				*r;
		auto longword 	timeout;
		Message 			messageArray[1];
		auto int 		result;
	brdInit();
	sock_init();
	
	messageArray[0].login = "linzee\n\r";
	messageArray[0].pass = "Poppy\n\r";
	messageArray[0].command = "perl linzee.pl\n\r";

	tcp_open(&(sock), 0, inet_addr(REMOTE_HOST), SERVER_PORT, NULL);


	timeout = SEC_TIMER + CONNECT_TIMEOUT;
	while( !tcp_established(&sock) ) {
		if( (long)(SEC_TIMER - timeout) >= 0 ) {
			printf( "ERROR: connect: timeout");
			exit(99);
		}
		if( ! tcp_tick( (sock_type *) &sock ) ) {
			printf( "ERROR: connect: %s\n", sock.err_msg );
			exit(99);
		}
	}

	printf("Connected to: %s:%d\n",REMOTE_HOST,SERVER_PORT);

	
	telnet_init(&cooker, &sock, TELNET_OPTION_GA|TELNET_OPTION_ECHO);

		p = messageArray[0].login;
		q = messageArray[0].pass;
		r = messageArray[0].command;

			
		telnet_fastwrite(&cooker, p, 7);
		if (telnet_fastread(&cooker, s, 1 )>0){
		telnet_fastwrite(&cooker, p, 7);
		}
		
		
				 
while (tcp_tick(&sock)) {
	
		if (telnet_fastread(&cooker, s, 1 )>0) printf("%c", *s);

}

	
	sock_close(&sock);
	while (tcp_tick(&sock) != 0);

}

sorry, that was me testing things....

well, in the while loop afterwards, it is running telnet_fastread all teh time, so the login prompt comes up first, then it writes the login and then it reads the password prompt...
i guess my thing must be non blocking then, as if i write
code:
telnet_fastread
telnet_fastwrite
telnet_fastread
telnet_fastwrite
/code

then it still puts it as
login: linzee

Poppy
Password:


where Poppy is the password.
how do i make it blocking? what does that mean?

well, telnet_fastread and telnet~_fastwrite uses this:

Code:

_tcp_nodebug int sock_fastread( tcp_Socket *s, byte *dp, int len )
{
   if( s->ip_type == TCP_PROTO )
      return tcp_read(s, dp, len);
   else
   	return -1;
}


_tcp_nodebug int sock_fastwrite( tcp_Socket *s, byte *dp, int len )
{
   if (s->ip_type == TCP_PROTO)
   	return tcp_write(s, dp, len);
   else
   	return -1;
}

which in turn use these:

Code:

_tcp_nodebug int tcp_write( tcp_Socket *s, byte *dp, int len )
{
   auto int x;

   LOCK_GLOBAL(TCPGlobalLock);
   LOCK_SOCK(s);

   // Check that we are in state which allows writing.
   if (s->state & (tcp_StateCLOSED | tcp_StateLASTACK | tcp_StateFINWT1 |
                   tcp_StateFINWT2 | tcp_StateCLOSING | tcp_StateTIMEWT)) {
   	len = -1;
   	goto finish;
   }
   
   if(len < 0 ) len = 0;
   if( len > (x = s->maxrdatalen - s->datalen) ) len = x;

   if( len > 0 ) {
      root2xmem( s->buffer + s->datalen, dp, len );

      s->datalen += len;
      s->datatimer = _SET_TIMEOUT( sock_data_timeout*1000L );

      if( s->sock_mode & TCP_LOCAL )
         s->sock_mode &= ~TCP_LOCAL;
      else {
         if( s->sock_mode & TCP_MODE_NONAGLE ) {
            tcp_send( s, 40 );
         } else {
            /* transmit if no unacked data or got complete MTU worth */
            if (!s->unacked ||
                s->datalen - s->unacked >= s->mss &&
                s->window - s->unacked >= s->mss)
               tcp_send( s, 41 );
            else
               tcp_sendsoon( s, 42 );
         }
      }
   }
finish:
   UNLOCK_SOCK(s);
   UNLOCK_GLOBAL(TCPGlobalLock);
   return( len );
}

any help??