path: root/source3/libsmb/cliconnect.c

/* 
   Unix SMB/Netbios implementation.
   Version 3.0
   client connect/disconnect routines
   Copyright (C) Andrew Tridgell 1994-1998
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#define NO_SYSLOG

#include "includes.h"


static  struct {
    int prot;
    char *name;
  }
prots[] = 
    {
      {PROTOCOL_CORE,"PC NETWORK PROGRAM 1.0"},
      {PROTOCOL_COREPLUS,"MICROSOFT NETWORKS 1.03"},
      {PROTOCOL_LANMAN1,"MICROSOFT NETWORKS 3.0"},
      {PROTOCOL_LANMAN1,"LANMAN1.0"},
      {PROTOCOL_LANMAN2,"LM1.2X002"},
      {PROTOCOL_LANMAN2,"Samba"},
      {PROTOCOL_NT1,"NT LANMAN 1.0"},
      {PROTOCOL_NT1,"NT LM 0.12"},
      {-1,NULL}
    };


/****************************************************************************
 Send a session setup. The username and workgroup is in UNIX character
 format and must be converted to DOS codepage format before sending. If the
 password is in plaintext, the same should be done.
****************************************************************************/

BOOL cli_session_setup(struct cli_state *cli, 
		       char *user, 
		       char *pass, int passlen,
		       char *ntpass, int ntpasslen,
		       char *workgroup)
{
	char *p;
	fstring pword, ntpword;
	fstring user2;

	/* allow for workgroups as part of the username */
	fstrcpy(user2, user);
	if ((p=strchr(user2,'\\')) || (p=strchr(user2,'/'))) {
		*p = 0;
		user = p+1;
		workgroup = user2;
	}

	if (cli->protocol < PROTOCOL_LANMAN1)
		return True;

	if (passlen > sizeof(pword)-1 || ntpasslen > sizeof(ntpword)-1) {
		return False;
	}

	if (((passlen == 0) || (passlen == 1)) && (pass[0] == '\0')) {
		/* Null session connect. */
		pword[0] = '\0';
		ntpword[0] = '\0';
	} else {
		if ((cli->sec_mode & 2) && passlen != 24) {
			/*
			 * Encrypted mode needed, and non encrypted password supplied.
			 */
			passlen = 24;
			ntpasslen = 24;
			fstrcpy(pword, pass);
			unix_to_dos(pword,True);
			fstrcpy(ntpword, ntpass);;
			unix_to_dos(ntpword,True);
			SMBencrypt((uchar *)pword,(uchar *)cli->cryptkey,(uchar *)pword);
			SMBNTencrypt((uchar *)ntpword,(uchar *)cli->cryptkey,(uchar *)ntpword);
		} else if ((cli->sec_mode & 2) && passlen == 24) {
			/*
			 * Encrypted mode needed, and encrypted password supplied.
			 */
			memcpy(pword, pass, passlen);
			if(ntpasslen == 24) {
				memcpy(ntpword, ntpass, ntpasslen);
			} else {
				fstrcpy(ntpword, "");
				ntpasslen = 0;
			}
		} else {
			/*
			 * Plaintext mode needed, assume plaintext supplied.
			 */
			fstrcpy(pword, pass);
			unix_to_dos(pword,True);
			fstrcpy(ntpword, "");
			ntpasslen = 0;
		}
	}

	/* if in share level security then don't send a password now */
	if (!(cli->sec_mode & 1)) {
		fstrcpy(pword, "");
		passlen=1;
		fstrcpy(ntpword, "");
		ntpasslen=1;
	} 

	/* send a session setup command */
	memset(cli->outbuf,'\0',smb_size);

	if (cli->protocol < PROTOCOL_NT1)
	{
		set_message(cli->outbuf,10,1 + strlen(user) + passlen,True);
		CVAL(cli->outbuf,smb_com) = SMBsesssetupX;
		cli_setup_packet(cli);

		CVAL(cli->outbuf,smb_vwv0) = 0xFF;
		SSVAL(cli->outbuf,smb_vwv2,cli->max_xmit);
		SSVAL(cli->outbuf,smb_vwv3,2);
		SSVAL(cli->outbuf,smb_vwv4,1);
		SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
		SSVAL(cli->outbuf,smb_vwv7,passlen);
		p = smb_buf(cli->outbuf);
		memcpy(p,pword,passlen);
		p += passlen;
		pstrcpy(p,user);
		unix_to_dos(p,True);
		strupper(p);
	}
	else
	{
		set_message(cli->outbuf,13,0,True);
		CVAL(cli->outbuf,smb_com) = SMBsesssetupX;
		cli_setup_packet(cli);
		
		CVAL(cli->outbuf,smb_vwv0) = 0xFF;
		SSVAL(cli->outbuf,smb_vwv2,CLI_BUFFER_SIZE);
		SSVAL(cli->outbuf,smb_vwv3,2);
		SSVAL(cli->outbuf,smb_vwv4,cli->pid);
		SIVAL(cli->outbuf,smb_vwv5,cli->sesskey);
		SSVAL(cli->outbuf,smb_vwv7,passlen);
		SSVAL(cli->outbuf,smb_vwv8,ntpasslen);
		SSVAL(cli->outbuf,smb_vwv11,CAP_NT_SMBS|(cli->use_level_II_oplocks ? CAP_LEVEL_II_OPLOCKS : 0));
		p = smb_buf(cli->outbuf);
		memcpy(p,pword,passlen); 
		p += SVAL(cli->outbuf,smb_vwv7);
		memcpy(p,ntpword,ntpasslen); 
		p += SVAL(cli->outbuf,smb_vwv8);
		pstrcpy(p,user);
		unix_to_dos(p,True);
		strupper(p);
		p = skip_string(p,1);
		pstrcpy(p,workgroup);
		unix_to_dos(p,True);
		strupper(p);
		p = skip_string(p,1);
		pstrcpy(p,"Unix");p = skip_string(p,1);
		pstrcpy(p,"Samba");p = skip_string(p,1);
		set_message(cli->outbuf,13,PTR_DIFF(p,smb_buf(cli->outbuf)),False);
	}

      cli_send_smb(cli);
      if (!cli_receive_smb(cli))
	      return False;

      show_msg(cli->inbuf);

      if (CVAL(cli->inbuf,smb_rcls) != 0) {
	      return False;
      }

      /* use the returned vuid from now on */
      cli->vuid = SVAL(cli->inbuf,smb_uid);

      if (cli->protocol >= PROTOCOL_NT1) {
        /*
         * Save off some of the connected server
         * info.
         */
        char *server_domain,*server_os,*server_type;
        server_os = smb_buf(cli->inbuf);
        server_type = skip_string(server_os,1);
        server_domain = skip_string(server_type,1);
        fstrcpy(cli->server_os, server_os);
		dos_to_unix(cli->server_os, True);
        fstrcpy(cli->server_type, server_type);
		dos_to_unix(cli->server_type, True);
        fstrcpy(cli->server_domain, server_domain);
		dos_to_unix(cli->server_domain, True);
      }

      fstrcpy(cli->user_name, user);
      dos_to_unix(cli->user_name, True);

      return True;
}

/****************************************************************************
 Send a uloggoff.
*****************************************************************************/

BOOL cli_ulogoff(struct cli_state *cli)
{
        memset(cli->outbuf,'\0',smb_size);
        set_message(cli->outbuf,2,0,True);
        CVAL(cli->outbuf,smb_com) = SMBulogoffX;
        cli_setup_packet(cli);
	SSVAL(cli->outbuf,smb_vwv0,0xFF);
	SSVAL(cli->outbuf,smb_vwv2,0);  /* no additional info */

        cli_send_smb(cli);
        if (!cli_receive_smb(cli))
                return False;

        return CVAL(cli->inbuf,smb_rcls) == 0;
}

/****************************************************************************
send a tconX
****************************************************************************/
BOOL cli_send_tconX(struct cli_state *cli, 
		    char *share, char *dev, char *pass, int passlen)
{
	fstring fullshare, pword, dos_pword;
	char *p;
	memset(cli->outbuf,'\0',smb_size);
	memset(cli->inbuf,'\0',smb_size);

	fstrcpy(cli->share, share);

	/* in user level security don't send a password now */
	if (cli->sec_mode & 1) {
		passlen = 1;
		pass = "";
	}

	if ((cli->sec_mode & 2) && *pass && passlen != 24) {
		/*
		 * Non-encrypted passwords - convert to DOS codepage before encryption.
		 */
		passlen = 24;
		fstrcpy(dos_pword,pass);
		unix_to_dos(dos_pword,True);
		SMBencrypt((uchar *)dos_pword,(uchar *)cli->cryptkey,(uchar *)pword);
	} else {
		if(!(cli->sec_mode & 2)) {
			/*
			 * Non-encrypted passwords - convert to DOS codepage before using.
			 */
			fstrcpy(pword,pass);
			unix_to_dos(pword,True);
		} else {
			memcpy(pword, pass, passlen);
		}
	}

	slprintf(fullshare, sizeof(fullshare)-1,
		 "\\\\%s\\%s", cli->desthost, share);
	unix_to_dos(fullshare, True);
	strupper(fullshare);

	set_message(cli->outbuf,4,
		    2 + strlen(fullshare) + passlen + strlen(dev),True);
	CVAL(cli->outbuf,smb_com) = SMBtconX;
	cli_setup_packet(cli);

	SSVAL(cli->outbuf,smb_vwv0,0xFF);
	SSVAL(cli->outbuf,smb_vwv3,passlen);

	p = smb_buf(cli->outbuf);
	memcpy(p,pword,passlen);
	p += passlen;
	fstrcpy(p,fullshare);
	p = skip_string(p,1);
	pstrcpy(p,dev);
	unix_to_dos(p,True);

	SCVAL(cli->inbuf,smb_rcls, 1);

	cli_send_smb(cli);
	if (!cli_receive_smb(cli))
		return False;

	if (CVAL(cli->inbuf,smb_rcls) != 0) {
		return False;
	}

	fstrcpy(cli->dev, "A:");

	if (cli->protocol >= PROTOCOL_NT1) {
		fstrcpy(cli->dev, smb_buf(cli->inbuf));
	}

	if (strcasecmp(share,"IPC$")==0) {
		fstrcpy(cli->dev, "IPC");
	}

	/* only grab the device if we have a recent protocol level */
	if (cli->protocol >= PROTOCOL_NT1 &&
	    smb_buflen(cli->inbuf) == 3) {
		/* almost certainly win95 - enable bug fixes */
		cli->win95 = True;
	}

	cli->cnum = SVAL(cli->inbuf,smb_tid);
	return True;
}


/****************************************************************************
send a tree disconnect
****************************************************************************/
BOOL cli_tdis(struct cli_state *cli)
{
	memset(cli->outbuf,'\0',smb_size);
	set_message(cli->outbuf,0,0,True);
	CVAL(cli->outbuf,smb_com) = SMBtdis;
	SSVAL(cli->outbuf,smb_tid,cli->cnum);
	cli_setup_packet(cli);
	
	cli_send_smb(cli);
	if (!cli_receive_smb(cli))
		return False;
	
	return CVAL(cli->inbuf,smb_rcls) == 0;
}


/****************************************************************************
send a negprot command
****************************************************************************/
void cli_negprot_send(struct cli_state *cli)
{
	char *p;
	int numprots;
	int plength;

	memset(cli->outbuf,'\0',smb_size);

	/* setup the protocol strings */
	for (plength=0,numprots=0;
	     prots[numprots].name && prots[numprots].prot<=cli->protocol;
	     numprots++)
		plength += strlen(prots[numprots].name)+2;
    
	set_message(cli->outbuf,0,plength,True);

	p = smb_buf(cli->outbuf);
	for (numprots=0;
	     prots[numprots].name && prots[numprots].prot<=cli->protocol;
	     numprots++) {
		*p++ = 2;
		pstrcpy(p,prots[numprots].name);
		unix_to_dos(p,True);
		p += strlen(p) + 1;
	}

	CVAL(cli->outbuf,smb_com) = SMBnegprot;
	cli_setup_packet(cli);

	CVAL(smb_buf(cli->outbuf),0) = 2;

	cli_send_smb(cli);
}


/****************************************************************************
send a negprot command
****************************************************************************/
BOOL cli_negprot(struct cli_state *cli)
{
	char *p;
	int numprots;
	int plength;

	memset(cli->outbuf,'\0',smb_size);

	/* setup the protocol strings */
	for (plength=0,numprots=0;
	     prots[numprots].name && prots[numprots].prot<=cli->protocol;
	     numprots++)
		plength += strlen(prots[numprots].name)+2;
    
	set_message(cli->outbuf,0,plength,True);

	p = smb_buf(cli->outbuf);
	for (numprots=0;
	     prots[numprots].name && prots[numprots].prot<=cli->protocol;
	     numprots++) {
		*p++ = 2;
		pstrcpy(p,prots[numprots].name);
		unix_to_dos(p,True);
		p += strlen(p) + 1;
	}

	CVAL(cli->outbuf,smb_com) = SMBnegprot;
	cli_setup_packet(cli);

	CVAL(smb_buf(cli->outbuf),0) = 2;

	cli_send_smb(cli);
	if (!cli_receive_smb(cli))
		return False;

	show_msg(cli->inbuf);

	if (CVAL(cli->inbuf,smb_rcls) != 0 || 
	    ((int)SVAL(cli->inbuf,smb_vwv0) >= numprots)) {
		return(False);
	}

	cli->protocol = prots[SVAL(cli->inbuf,smb_vwv0)].prot;


	if (cli->protocol >= PROTOCOL_NT1) {    
		/* NT protocol */
		cli->sec_mode = CVAL(cli->inbuf,smb_vwv1);
		cli->max_mux = SVAL(cli->inbuf, smb_vwv1+1);
		cli->max_xmit = IVAL(cli->inbuf,smb_vwv3+1);
		cli->sesskey = IVAL(cli->inbuf,smb_vwv7+1);
		cli->serverzone = SVALS(cli->inbuf,smb_vwv15+1);
		cli->serverzone *= 60;
		/* this time arrives in real GMT */
		cli->servertime = interpret_long_date(cli->inbuf+smb_vwv11+1);
		memcpy(cli->cryptkey,smb_buf(cli->inbuf),8);
		cli->capabilities = IVAL(cli->inbuf,smb_vwv9+1);
		if (cli->capabilities & CAP_RAW_MODE) {
			cli->readbraw_supported = True;
			cli->writebraw_supported = True;      
		}
	} else if (cli->protocol >= PROTOCOL_LANMAN1) {
		cli->sec_mode = SVAL(cli->inbuf,smb_vwv1);
		cli->max_xmit = SVAL(cli->inbuf,smb_vwv2);
		cli->sesskey = IVAL(cli->inbuf,smb_vwv6);
		cli->serverzone = SVALS(cli->inbuf,smb_vwv10);
		cli->serverzone *= 60;
		/* this time is converted to GMT by make_unix_date */
		cli->servertime = make_unix_date(cli->inbuf+smb_vwv8);
		cli->readbraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x1) != 0);
		cli->writebraw_supported = ((SVAL(cli->inbuf,smb_vwv5) & 0x2) != 0);
		memcpy(cli->cryptkey,smb_buf(cli->inbuf),8);
	} else {
		/* the old core protocol */
		cli->sec_mode = 0;
		cli->serverzone = TimeDiff(time(NULL));
	}

	cli->max_xmit = MIN(cli->max_xmit, CLI_BUFFER_SIZE);

	return True;
}


/****************************************************************************
  send a session request.  see rfc1002.txt 4.3 and 4.3.2
****************************************************************************/
BOOL cli_session_request(struct cli_state *cli,
			 struct nmb_name *calling, struct nmb_name *called)
{
	char *p;
	int len = 4;
	extern pstring user_socket_options;

	/* send a session request (RFC 1002) */

	memcpy(&(cli->calling), calling, sizeof(*calling));
	memcpy(&(cli->called ), called , sizeof(*called ));
  
	/* put in the destination name */
	p = cli->outbuf+len;
	name_mangle(cli->called .name, p, cli->called .name_type);
	len += name_len(p);

	/* and my name */
	p = cli->outbuf+len;
	name_mangle(cli->calling.name, p, cli->calling.name_type);
	len += name_len(p);

	/* setup the packet length */
	_smb_setlen(cli->outbuf,len);
	CVAL(cli->outbuf,0) = 0x81;

#ifdef WITH_SSL
retry:
#endif /* WITH_SSL */

	cli_send_smb(cli);
	DEBUG(5,("Sent session request\n"));

	if (!cli_receive_smb(cli))
		return False;

	if (CVAL(cli->inbuf,0) == 0x84) {
		/* C. Hoch  9/14/95 Start */
		/* For information, here is the response structure.
		 * We do the byte-twiddling to for portability.
		struct RetargetResponse{
		unsigned char type;
		unsigned char flags;
		int16 length;
		int32 ip_addr;
		int16 port;
		};
		*/
		int port = (CVAL(cli->inbuf,8)<<8)+CVAL(cli->inbuf,9);
		/* SESSION RETARGET */
		putip((char *)&cli->dest_ip,cli->inbuf+4);

		cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, port, LONG_CONNECT_TIMEOUT);
		if (cli->fd == -1)
			return False;

		DEBUG(3,("Retargeted\n"));

		set_socket_options(cli->fd,user_socket_options);

		/* Try again */
		{
			static int depth;
			BOOL ret;
			if (depth > 4) {
				DEBUG(0,("Retarget recursion - failing\n"));
				return False;
			}
			depth++;
			ret = cli_session_request(cli, calling, called);
			depth--;
			return ret;
		}
	} /* C. Hoch 9/14/95 End */

#ifdef WITH_SSL
    if (CVAL(cli->inbuf,0) == 0x83 && CVAL(cli->inbuf,4) == 0x8e){ /* use ssl */
        if (!sslutil_fd_is_ssl(cli->fd)){
            if (sslutil_connect(cli->fd) == 0)
                goto retry;
        }
    }
#endif /* WITH_SSL */

	if (CVAL(cli->inbuf,0) != 0x82) {
                /* This is the wrong place to put the error... JRA. */
		cli->rap_error = CVAL(cli->inbuf,4);
		return False;
	}
	return(True);
}


/****************************************************************************
open the client sockets
****************************************************************************/
BOOL cli_connect(struct cli_state *cli, const char *host, struct in_addr *ip)
{
	extern struct in_addr ipzero;
	extern pstring user_socket_options;

	fstrcpy(cli->desthost, host);
	
	if (!ip || ip_equal(*ip, ipzero)) {
                if (!resolve_name( cli->desthost, &cli->dest_ip, 0x20)) {
                        return False;
                }
		if (ip) *ip = cli->dest_ip;
	} else {
		cli->dest_ip = *ip;
	}

        if (cli->port == 0) cli->port = 139;  /* Set to default */

	cli->fd = open_socket_out(SOCK_STREAM, &cli->dest_ip, 
				  cli->port, cli->timeout);
	if (cli->fd == -1)
		return False;

	set_socket_options(cli->fd,user_socket_options);

	return True;
}

/****************************************************************************
re-establishes a connection
****************************************************************************/
BOOL cli_reestablish_connection(struct cli_state *cli)
{
	struct nmb_name calling;
	struct nmb_name called;
	fstring dest_host;
	fstring share;
	fstring dev;
	BOOL do_tcon = False;
	int oldfd = cli->fd;

	if (!cli->initialised || cli->fd == -1)
	{
		DEBUG(3,("cli_reestablish_connection: not connected\n"));
		return False;
	}

	/* copy the parameters necessary to re-establish the connection */

	if (cli->cnum != 0)
	{
		fstrcpy(share, cli->share);
		fstrcpy(dev  , cli->dev);
		do_tcon = True;
	}

	memcpy(&called , &(cli->called ), sizeof(called ));
	memcpy(&calling, &(cli->calling), sizeof(calling));
	fstrcpy(dest_host, cli->full_dest_host_name);

	DEBUG(5,("cli_reestablish_connection: %s connecting to %s (ip %s) - %s [%s]\n",
		 nmb_namestr(&calling), nmb_namestr(&called), 
		 inet_ntoa(cli->dest_ip),
		 cli->user_name, cli->domain));

	cli->fd = -1;

	if (cli_establish_connection(cli,
				     dest_host, &cli->dest_ip,
				     &calling, &called,
				     share, dev, False, do_tcon)) {
		if ((cli->fd != oldfd) && (oldfd != -1)) {
			close( oldfd );
		}
		return True;
	}
	return False;
}

/****************************************************************************
establishes a connection right up to doing tconX, reading in a password.
****************************************************************************/
BOOL cli_establish_connection(struct cli_state *cli, 
				char *dest_host, struct in_addr *dest_ip,
				struct nmb_name *calling, struct nmb_name *called,
				char *service, char *service_type,
				BOOL do_shutdown, BOOL do_tcon)
{
	DEBUG(5,("cli_establish_connection: %s connecting to %s (%s) - %s [%s]\n",
		          nmb_namestr(calling), nmb_namestr(called), inet_ntoa(*dest_ip),
	              cli->user_name, cli->domain));

	/* establish connection */

	if ((!cli->initialised))
	{
		return False;
	}

	if (cli->fd == -1)
	{
		if (!cli_connect(cli, dest_host, dest_ip))
		{
			DEBUG(1,("cli_establish_connection: failed to connect to %s (%s)\n",
					  nmb_namestr(calling), inet_ntoa(*dest_ip)));
			return False;
		}
	}

	if (!cli_session_request(cli, calling, called))
	{
		DEBUG(1,("failed session request\n"));
		if (do_shutdown)
          cli_shutdown(cli);
		return False;
	}

	if (!cli_negprot(cli))
	{
		DEBUG(1,("failed negprot\n"));
		if (do_shutdown)
          		cli_shutdown(cli);
		return False;
	}

	if (cli->pwd.cleartext || cli->pwd.null_pwd)
	{
		fstring passwd;
		int pass_len;

		if (cli->pwd.null_pwd)
		{
			/* attempt null session */
			passwd[0] = 0;
			pass_len = 1;
		}
		else
		{
			/* attempt clear-text session */
			pwd_get_cleartext(&(cli->pwd), passwd);
			pass_len = strlen(passwd);
		}

		/* attempt clear-text session */
		if (!cli_session_setup(cli, cli->user_name,
	                       passwd, pass_len,
	                       NULL, 0,
	                       cli->domain))
		{
			DEBUG(1,("failed session setup\n"));
			if (do_shutdown)
			{
				cli_shutdown(cli);
			}
			return False;
		}
		if (do_tcon)
		{
			if (!cli_send_tconX(cli, service, service_type,
			                    (char*)passwd, strlen(passwd)))
			{
				DEBUG(1,("failed tcon_X\n"));
				if (do_shutdown)
				{
					cli_shutdown(cli);
				}
				return False;
			}
		}
	}
	else
	{
		/* attempt encrypted session */
		unsigned char nt_sess_pwd[24];
		unsigned char lm_sess_pwd[24];

		/* creates (storing a copy of) and then obtains a 24 byte password OWF */
		pwd_make_lm_nt_owf(&(cli->pwd), cli->cryptkey);
		pwd_get_lm_nt_owf(&(cli->pwd), lm_sess_pwd, nt_sess_pwd);

		/* attempt encrypted session */
		if (!cli_session_setup(cli, cli->user_name,
	                       (char*)lm_sess_pwd, sizeof(lm_sess_pwd),
	                       (char*)nt_sess_pwd, sizeof(nt_sess_pwd),
	                       cli->domain))
		{
			DEBUG(1,("failed session setup\n"));
			if (do_shutdown)
		              cli_shutdown(cli);
			return False;
		}

    		DEBUG(1,("session setup ok\n"));
    
    		if (*cli->server_domain || *cli->server_os || *cli->server_type)
    		{
    			DEBUG(1,("Domain=[%s] OS=[%s] Server=[%s]\n",
    			     cli->server_domain,
    		             cli->server_os,
    		             cli->server_type));
    		}
		
		if (do_tcon)
		{
			if (!cli_send_tconX(cli, service, service_type,
			                    (char*)nt_sess_pwd, sizeof(nt_sess_pwd)))
			{
				DEBUG(1,("failed tcon_X\n"));
				if (do_shutdown)
                  cli_shutdown(cli);
				return False;
			}
		}
	}

	if (do_shutdown)
      cli_shutdown(cli);

	return True;
}


/****************************************************************************
 Attempt a NetBIOS session request, falling back to *SMBSERVER if needed.
****************************************************************************/

BOOL attempt_netbios_session_request(struct cli_state *cli, char *srchost, char *desthost,
                                     struct in_addr *pdest_ip)
{
  struct nmb_name calling, called;

  make_nmb_name(&calling, srchost, 0x0);

  /*
   * If the called name is an IP address
   * then use *SMBSERVER immediately.
   */

  if(is_ipaddress(desthost))
    make_nmb_name(&called, "*SMBSERVER", 0x20);
  else
    make_nmb_name(&called, desthost, 0x20);

  if (!cli_session_request(cli, &calling, &called)) {
    struct nmb_name smbservername;

    make_nmb_name(&smbservername , "*SMBSERVER", 0x20);

    /*
     * If the name wasn't *SMBSERVER then
     * try with *SMBSERVER if the first name fails.
     */

    if (nmb_name_equal(&called, &smbservername)) {

        /*
         * The name used was *SMBSERVER, don't bother with another name.
         */

        DEBUG(0,("attempt_netbios_session_request: %s rejected the session for name *SMBSERVER \
with error %s.\n", desthost, cli_errstr(cli) ));
	    cli_shutdown(cli);
		return False;
	}

    cli_shutdown(cli);

    if (!cli_initialise(cli) ||
        !cli_connect(cli, desthost, pdest_ip) ||
        !cli_session_request(cli, &calling, &smbservername)) {
          DEBUG(0,("attempt_netbios_session_request: %s rejected the session for \
name *SMBSERVER with error %s\n", desthost, cli_errstr(cli) ));
          cli_shutdown(cli);
          return False;
    }
  }

  return True;
}