/* 
   Unix SMB/Netbios implementation.
   Version 1.9.
   NT Domain Authentication SMB / MSRPC client
   Copyright (C) Andrew Tridgell 1994-1997
   Copyright (C) Luke Kenneth Casson Leighton 1996-1997
   
   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.
*/

#ifdef SYSLOG
#undef SYSLOG
#endif

#include "includes.h"

extern int DEBUGLEVEL;
extern pstring username;
extern pstring workgroup;

#define CLIENT_TIMEOUT (30*1000)

#ifdef NTDOMAIN

/****************************************************************************
  open an rpc pipe (\NETLOGON or \srvsvc for example)
  ****************************************************************************/
uint16 open_rpc_pipe(char *inbuf, char *outbuf, char *rname, int Client, int cnum)
{
	int fnum;
	char *p;

	DEBUG(5,("open_rpc_pipe: %s\n", rname));

	bzero(outbuf,smb_size);
	set_message(outbuf,15,1 + strlen(rname),True);

	CVAL(outbuf,smb_com) = SMBopenX;
	SSVAL(outbuf,smb_tid, cnum);
	cli_setup_pkt(outbuf);

	SSVAL(outbuf,smb_vwv0,0xFF);
	SSVAL(outbuf,smb_vwv2,1);
	SSVAL(outbuf,smb_vwv3,(DENY_NONE<<4));
	SSVAL(outbuf,smb_vwv4,aSYSTEM | aHIDDEN);
	SSVAL(outbuf,smb_vwv5,aSYSTEM | aHIDDEN);
	SSVAL(outbuf,smb_vwv8,1);

	p = smb_buf(outbuf);
	strcpy(p,rname);
	p = skip_string(p,1);

	send_smb(Client,outbuf);
	receive_smb(Client,inbuf,CLIENT_TIMEOUT);

	if (CVAL(inbuf,smb_rcls) != 0)
	{
		if (CVAL(inbuf,smb_rcls) == ERRSRV &&
		    SVAL(inbuf,smb_err) == ERRnoresource &&
		    cli_reopen_connection(inbuf,outbuf))
		{
			return open_rpc_pipe(inbuf, outbuf, rname, Client, cnum);
		}
		DEBUG(0,("opening remote pipe %s - error %s\n", rname, smb_errstr(inbuf)));

		return 0xffff;
	}

	fnum = SVAL(inbuf, smb_vwv2);

	DEBUG(5,("opening pipe: fnum %d\n", fnum));

	return fnum;
}

/****************************************************************************
do an rpc bind
****************************************************************************/
BOOL bind_rpc_pipe(char *pipe_name, uint16 fnum, uint32 call_id,
				RPC_IFACE *abstract, RPC_IFACE *transfer)
{
	char *rparam = NULL;
	char *rdata = NULL;
	char *p;
	int rdrcnt,rprcnt;
	int data_len;
	pstring data; /* only 1024 bytes */
	uint16 setup[2]; /* only need 2 uint16 setup parameters */

	RPC_HDR    hdr;

	RPC_HDR_RB hdr_rb;

    BOOL valid_ack = False;

	if (pipe_name == NULL || abstract == NULL || transfer == NULL) return False;

	DEBUG(5,("Bind RPC Pipe[%d]: %s\n", fnum, pipe_name));

	/* create the request RPC_HDR_RB */
	make_rpc_hdr_rb(&hdr_rb, 
	                0x1630, 0x1630, 0x0,
	                0x1, 0x1, 0x1,
					abstract, transfer);

	/* stream the bind request data */
	p = smb_io_rpc_hdr_rb(False, &hdr_rb, data + 0x10, data, 4, 0);

	data_len = PTR_DIFF(p, data);

	/* create the request RPC_HDR */
	make_rpc_hdr(&hdr, RPC_BIND, 0x0, call_id, PTR_DIFF(p, data + 0x10));

	/* stream the header into data */
	p = smb_io_rpc_hdr(False, &hdr, data, data, 4, 0);

	/* create setup parameters. */
	setup[0] = 0x0026; /* 0x26 indicates "transact named pipe" */
	setup[1] = fnum; /* file handle, from the SMBcreateX pipe, earlier */

	/* send the data on \PIPE\ */
	if (cli_call_api("\\PIPE\\", 0, data_len, 2, 1024,
                BUFFER_SIZE,
				&rprcnt, &rdrcnt,
				NULL, data, setup,
				&rparam, &rdata))
	{
		RPC_HDR_BA hdr_ba;
		int hdr_len;
		int pkt_len;

		DEBUG(5, ("cli_call_api: return OK\n"));

		p = rdata;

		if (p) p = smb_io_rpc_hdr(True, &hdr, p, rdata, 4, 0);
		if (p) p = align_offset(p, rdata, 4); /* oh, what a surprise */

		hdr_len = PTR_DIFF(p, rdata);

		if (p) p = smb_io_rpc_hdr_ba(True, &hdr_ba, p, rdata, 4, 0);

		pkt_len = PTR_DIFF(p, rdata);
#if 0
		if (p && hdr_len != hdr.hdr.frag_len - hdr.alloc_hint)
		{
			/* header length not same as calculated header length */
			DEBUG(2,("bind_rpc_pipe: hdr_len %x != frag_len-alloc_hint %x\n",
			          hdr_len, hdr.hdr.frag_len - hdr.alloc_hint));
			p = NULL;
		}


		if (p && pkt_len != hdr.hdr.frag_len)
		{
			/* packet data size not same as reported fragment length */
			DEBUG(2,("bind_rpc_pipe: pkt_len %x != frag_len \n",
			                           pkt_len, hdr.hdr.frag_len));
			p = NULL;
		}
#endif

		if (p && (strcmp(pipe_name, hdr_ba.addr.str) != 0))
		{
			DEBUG(2,("bind_rpc_pipe: pipe_name %s != expected pipe %s\n",
			         pipe_name, hdr_ba.addr.str));
			p = NULL;
		}

		if (p)
		{
			/* check the transfer syntax */
			valid_ack = (hdr_ba.transfer.version == transfer->version) &&
			        (memcmp(hdr_ba.transfer.data, transfer->data,
			                sizeof(transfer->version)) ==0);
			if (!valid_ack)
			{
				DEBUG(2,("bind_rpc_pipe: transfer syntax differs\n"));
				p = NULL;
			}
		}
		
		if (p)
		{
			/* check the results */
			valid_ack = (hdr_ba.res.num_results == 0x1) &&
			            (hdr_ba.res.result == 0);
			
			if (!valid_ack)
			{
				DEBUG(2,("bind_rpc_pipe: bind denied results: %d reason: %x\n",
				          hdr_ba.res.num_results,
			              hdr_ba.res.reason));
				p = NULL;
			}
			else
			{
				DEBUG(5,("bind_rpc_pipe: accepted!\n"));
			}
		}
	}

	if (rparam) free(rparam);
	if (rdata) free(rdata);

	return valid_ack;
}
#endif /* NTDOMAIN */