connect.c 104.5 KB
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/*
 *   fs/cifs/connect.c
 *
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 *   Copyright (C) International Business Machines  Corp., 2002,2005
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 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
#include <linux/fs.h>
#include <linux/net.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/ipv6.h>
#include <linux/pagemap.h>
#include <linux/ctype.h>
#include <linux/utsname.h>
#include <linux/mempool.h>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <linux/pagevec.h>
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#include <asm/uaccess.h>
#include <asm/processor.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "ntlmssp.h"
#include "nterr.h"
#include "rfc1002pdu.h"

#define CIFS_PORT 445
#define RFC1001_PORT 139

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static DECLARE_COMPLETION(cifsd_complete);

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extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
		       unsigned char *p24);
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
			 unsigned char *p24);

extern mempool_t *cifs_req_poolp;

struct smb_vol {
	char *username;
	char *password;
	char *domainname;
	char *UNC;
	char *UNCip;
	char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
	char *iocharset;  /* local code page for mapping to and from Unicode */
	char source_rfc1001_name[16]; /* netbios name of client */
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	char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
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	uid_t linux_uid;
	gid_t linux_gid;
	mode_t file_mode;
	mode_t dir_mode;
	unsigned rw:1;
	unsigned retry:1;
	unsigned intr:1;
	unsigned setuids:1;
	unsigned noperm:1;
	unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
	unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
	unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
	unsigned direct_io:1;
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	unsigned remap:1;   /* set to remap seven reserved chars in filenames */
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	unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
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	unsigned sfu_emul:1;
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	unsigned nocase;     /* request case insensitive filenames */
	unsigned nobrl;      /* disable sending byte range locks to srv */
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	unsigned int rsize;
	unsigned int wsize;
	unsigned int sockopt;
	unsigned short int port;
};

static int ipv4_connect(struct sockaddr_in *psin_server, 
			struct socket **csocket,
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			char * netb_name,
			char * server_netb_name);
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static int ipv6_connect(struct sockaddr_in6 *psin_server, 
			struct socket **csocket);


	/* 
	 * cifs tcp session reconnection
	 * 
	 * mark tcp session as reconnecting so temporarily locked
	 * mark all smb sessions as reconnecting for tcp session
	 * reconnect tcp session
	 * wake up waiters on reconnection? - (not needed currently)
	 */

int
cifs_reconnect(struct TCP_Server_Info *server)
{
	int rc = 0;
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	struct cifsTconInfo *tcon;
	struct mid_q_entry * mid_entry;
	
	spin_lock(&GlobalMid_Lock);
	if(server->tcpStatus == CifsExiting) {
		/* the demux thread will exit normally 
		next time through the loop */
		spin_unlock(&GlobalMid_Lock);
		return rc;
	} else
		server->tcpStatus = CifsNeedReconnect;
	spin_unlock(&GlobalMid_Lock);
	server->maxBuf = 0;

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	cFYI(1, ("Reconnecting tcp session"));
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	/* before reconnecting the tcp session, mark the smb session (uid)
		and the tid bad so they are not used until reconnected */
	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
		if (ses->server) {
			if (ses->server == server) {
				ses->status = CifsNeedReconnect;
				ses->ipc_tid = 0;
			}
		}
		/* else tcp and smb sessions need reconnection */
	}
	list_for_each(tmp, &GlobalTreeConnectionList) {
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
			tcon->tidStatus = CifsNeedReconnect;
		}
	}
	read_unlock(&GlobalSMBSeslock);
	/* do not want to be sending data on a socket we are freeing */
	down(&server->tcpSem); 
	if(server->ssocket) {
		cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
			server->ssocket->flags));
		server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
		cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
			server->ssocket->flags));
		sock_release(server->ssocket);
		server->ssocket = NULL;
	}

	spin_lock(&GlobalMid_Lock);
	list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct
					mid_q_entry,
					qhead);
		if(mid_entry) {
			if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
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				/* Mark other intransit requests as needing
				   retry so we do not immediately mark the
				   session bad again (ie after we reconnect
				   below) as they timeout too */
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				mid_entry->midState = MID_RETRY_NEEDED;
			}
		}
	}
	spin_unlock(&GlobalMid_Lock);
	up(&server->tcpSem); 

	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
	{
		if(server->protocolType == IPV6) {
			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
		} else {
			rc = ipv4_connect(&server->addr.sockAddr, 
					&server->ssocket,
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					server->workstation_RFC1001_name,
					server->server_RFC1001_name);
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		}
		if(rc) {
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			cFYI(1,("reconnect error %d",rc));
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			msleep(3000);
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		} else {
			atomic_inc(&tcpSesReconnectCount);
			spin_lock(&GlobalMid_Lock);
			if(server->tcpStatus != CifsExiting)
				server->tcpStatus = CifsGood;
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			server->sequence_number = 0;
			spin_unlock(&GlobalMid_Lock);			
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	/*		atomic_set(&server->inFlight,0);*/
			wake_up(&server->response_q);
		}
	}
	return rc;
}

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/* 
	return codes:
		0 	not a transact2, or all data present
		>0 	transact2 with that much data missing
		-EINVAL = invalid transact2

 */
static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
{
	struct smb_t2_rsp * pSMBt;
        int total_data_size;
	int data_in_this_rsp;
	int remaining;

	if(pSMB->Command != SMB_COM_TRANSACTION2)
		return 0;

        /* check for plausible wct, bcc and t2 data and parm sizes */
        /* check for parm and data offset going beyond end of smb */
	if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
		cFYI(1,("invalid transact2 word count"));
		return -EINVAL;
	}

	pSMBt = (struct smb_t2_rsp *)pSMB;

	total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
	data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);

	remaining = total_data_size - data_in_this_rsp;

	if(remaining == 0)
		return 0;
	else if(remaining < 0) {
		cFYI(1,("total data %d smaller than data in frame %d",
			total_data_size, data_in_this_rsp));
		return -EINVAL;
	} else {
		cFYI(1,("missing %d bytes from transact2, check next response",
			remaining));
		if(total_data_size > maxBufSize) {
			cERROR(1,("TotalDataSize %d is over maximum buffer %d",
				total_data_size,maxBufSize));
			return -EINVAL; 
		}
		return remaining;
	}
}

static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
{
	struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
	struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
	int total_data_size;
	int total_in_buf;
	int remaining;
	int total_in_buf2;
	char * data_area_of_target;
	char * data_area_of_buf2;
	__u16 byte_count;

	total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);

	if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
		cFYI(1,("total data sizes of primary and secondary t2 differ"));
	}

	total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);

	remaining = total_data_size - total_in_buf;
	
	if(remaining < 0)
		return -EINVAL;

	if(remaining == 0) /* nothing to do, ignore */
		return 0;
	
	total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
	if(remaining < total_in_buf2) {
		cFYI(1,("transact2 2nd response contains too much data"));
	}

	/* find end of first SMB data area */
	data_area_of_target = (char *)&pSMBt->hdr.Protocol + 
				le16_to_cpu(pSMBt->t2_rsp.DataOffset);
	/* validate target area */

	data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
                                        le16_to_cpu(pSMB2->t2_rsp.DataOffset);

	data_area_of_target += total_in_buf;

	/* copy second buffer into end of first buffer */
	memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
	total_in_buf += total_in_buf2;
	pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
	byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
	byte_count += total_in_buf2;
	BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);

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	byte_count = pTargetSMB->smb_buf_length;
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	byte_count += total_in_buf2;

	/* BB also add check that we are not beyond maximum buffer size */
		
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	pTargetSMB->smb_buf_length = byte_count;
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	if(remaining == total_in_buf2) {
		cFYI(1,("found the last secondary response"));
		return 0; /* we are done */
	} else /* more responses to go */
		return 1;

}

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static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
	int length;
	unsigned int pdu_length, total_read;
	struct smb_hdr *smb_buffer = NULL;
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	struct smb_hdr *bigbuf = NULL;
	struct smb_hdr *smallbuf = NULL;
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	struct msghdr smb_msg;
	struct kvec iov;
	struct socket *csocket = server->ssocket;
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	struct task_struct *task_to_wake = NULL;
	struct mid_q_entry *mid_entry;
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	char temp;
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	int isLargeBuf = FALSE;
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	int isMultiRsp;
	int reconnect;
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	daemonize("cifsd");
	allow_signal(SIGKILL);
	current->flags |= PF_MEMALLOC;
	server->tsk = current;	/* save process info to wake at shutdown */
	cFYI(1, ("Demultiplex PID: %d", current->pid));
	write_lock(&GlobalSMBSeslock); 
	atomic_inc(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
	write_unlock(&GlobalSMBSeslock);
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	complete(&cifsd_complete);
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	if(length  > 1) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}

	while (server->tcpStatus != CifsExiting) {
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		if (try_to_freeze())
			continue;
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		if (bigbuf == NULL) {
			bigbuf = cifs_buf_get();
			if(bigbuf == NULL) {
				cERROR(1,("No memory for large SMB response"));
				msleep(3000);
				/* retry will check if exiting */
				continue;
			}
		} else if(isLargeBuf) {
			/* we are reusing a dirtry large buf, clear its start */
			memset(bigbuf, 0, sizeof (struct smb_hdr));
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		}
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		if (smallbuf == NULL) {
			smallbuf = cifs_small_buf_get();
			if(smallbuf == NULL) {
				cERROR(1,("No memory for SMB response"));
				msleep(1000);
				/* retry will check if exiting */
				continue;
			}
			/* beginning of smb buffer is cleared in our buf_get */
		} else /* if existing small buf clear beginning */
			memset(smallbuf, 0, sizeof (struct smb_hdr));

		isLargeBuf = FALSE;
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		isMultiRsp = FALSE;
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		smb_buffer = smallbuf;
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		iov.iov_base = smb_buffer;
		iov.iov_len = 4;
		smb_msg.msg_control = NULL;
		smb_msg.msg_controllen = 0;
		length =
		    kernel_recvmsg(csocket, &smb_msg,
				 &iov, 1, 4, 0 /* BB see socket.h flags */);

		if(server->tcpStatus == CifsExiting) {
			break;
		} else if (server->tcpStatus == CifsNeedReconnect) {
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			cFYI(1,("Reconnect after server stopped responding"));
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			cifs_reconnect(server);
			cFYI(1,("call to reconnect done"));
			csocket = server->ssocket;
			continue;
		} else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
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			msleep(1); /* minimum sleep to prevent looping
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				allowing socket to clear and app threads to set
				tcpStatus CifsNeedReconnect if server hung */
			continue;
		} else if (length <= 0) {
			if(server->tcpStatus == CifsNew) {
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				cFYI(1,("tcp session abend after SMBnegprot"));
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				/* some servers kill the TCP session rather than
				   returning an SMB negprot error, in which
				   case reconnecting here is not going to help,
				   and so simply return error to mount */
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				break;
			}
			if(length == -EINTR) { 
				cFYI(1,("cifsd thread killed"));
				break;
			}
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			cFYI(1,("Reconnect after unexpected peek error %d",
				length));
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			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
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		} else if (length < 4) {
			cFYI(1,
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			    ("Frame under four bytes received (%d bytes long)",
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			      length));
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		}
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		/* The right amount was read from socket - 4 bytes */
		/* so we can now interpret the length field */
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		/* the first byte big endian of the length field,
		is actually not part of the length but the type
		with the most common, zero, as regular data */
		temp = *((char *) smb_buffer);
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		/* Note that FC 1001 length is big endian on the wire, 
		but we convert it here so it is always manipulated
		as host byte order */
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		pdu_length = ntohl(smb_buffer->smb_buf_length);
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		smb_buffer->smb_buf_length = pdu_length;

		cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
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		if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
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			continue; 
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		} else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
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			cFYI(1,("Good RFC 1002 session rsp"));
			continue;
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		} else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
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			/* we get this from Windows 98 instead of 
			   an error on SMB negprot response */
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			cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
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				pdu_length));
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			if(server->tcpStatus == CifsNew) {
				/* if nack on negprot (rather than 
				ret of smb negprot error) reconnecting
				not going to help, ret error to mount */
				break;
			} else {
				/* give server a second to
				clean up before reconnect attempt */
				msleep(1000);
				/* always try 445 first on reconnect
				since we get NACK on some if we ever
				connected to port 139 (the NACK is 
				since we do not begin with RFC1001
				session initialize frame) */
				server->addr.sockAddr.sin_port = 
					htons(CIFS_PORT);
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				cifs_reconnect(server);
				csocket = server->ssocket;
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				wake_up(&server->response_q);
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				continue;
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			}
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		} else if (temp != (char) 0) {
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			cERROR(1,("Unknown RFC 1002 frame"));
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			cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
				      length);
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			cifs_reconnect(server);
			csocket = server->ssocket;
			continue;
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		}

		/* else we have an SMB response */
		if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
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			    (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
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			cERROR(1, ("Invalid size SMB length %d pdu_length %d",
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					length, pdu_length+4));
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			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		} 

		/* else length ok */
		reconnect = 0;

		if(pdu_length > MAX_CIFS_HDR_SIZE - 4) {
			isLargeBuf = TRUE;
			memcpy(bigbuf, smallbuf, 4);
			smb_buffer = bigbuf;
		}
		length = 0;
		iov.iov_base = 4 + (char *)smb_buffer;
		iov.iov_len = pdu_length;
		for (total_read = 0; total_read < pdu_length; 
		     total_read += length) {
			length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
						pdu_length - total_read, 0);
			if((server->tcpStatus == CifsExiting) ||
			    (length == -EINTR)) {
				/* then will exit */
				reconnect = 2;
				break;
			} else if (server->tcpStatus == CifsNeedReconnect) {
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				cifs_reconnect(server);
				csocket = server->ssocket;
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			        /* Reconnect wakes up rspns q */
				/* Now we will reread sock */
				reconnect = 1;
				break;
			} else if ((length == -ERESTARTSYS) || 
				   (length == -EAGAIN)) {
				msleep(1); /* minimum sleep to prevent looping,
                                              allowing socket to clear and app 
					      threads to set tcpStatus
					      CifsNeedReconnect if server hung*/
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				continue;
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			} else if (length <= 0) {
				cERROR(1,("Received no data, expecting %d",
					      pdu_length - total_read));
				cifs_reconnect(server);
				csocket = server->ssocket;
				reconnect = 1;
				break;
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			}
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		}
		if(reconnect == 2)
			break;
		else if(reconnect == 1)
			continue;
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		length += 4; /* account for rfc1002 hdr */
	
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		dump_smb(smb_buffer, length);
		if (checkSMB (smb_buffer, smb_buffer->Mid, total_read+4)) {
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			cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
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			continue;
		}
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		task_to_wake = NULL;
		spin_lock(&GlobalMid_Lock);
		list_for_each(tmp, &server->pending_mid_q) {
			mid_entry = list_entry(tmp, struct mid_q_entry, qhead);

			if ((mid_entry->mid == smb_buffer->Mid) && 
			    (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
			    (mid_entry->command == smb_buffer->Command)) {
				if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
					/* We have a multipart transact2 resp */
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					isMultiRsp = TRUE;
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					if(mid_entry->resp_buf) {
						/* merge response - fix up 1st*/
						if(coalesce_t2(smb_buffer, 
							mid_entry->resp_buf)) {
							break;
						} else {
							/* all parts received */
							goto multi_t2_fnd; 
						}
					} else {
						if(!isLargeBuf) {
							cERROR(1,("1st trans2 resp needs bigbuf"));
					/* BB maybe we can fix this up,  switch
				   	   to already allocated large buffer? */
						} else {
591
							/* Have first buffer */
592 593 594 595 596 597 598 599 600
							mid_entry->resp_buf =
								 smb_buffer;
							mid_entry->largeBuf = 1;
							bigbuf = NULL;
						}
					}
					break;
				} 
				mid_entry->resp_buf = smb_buffer;
601
				if(isLargeBuf)
602
					mid_entry->largeBuf = 1;
603
				else
604 605 606 607
					mid_entry->largeBuf = 0;
multi_t2_fnd:
				task_to_wake = mid_entry->tsk;
				mid_entry->midState = MID_RESPONSE_RECEIVED;
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#ifdef CONFIG_CIFS_STATS2
				mid_entry->when_received = jiffies;
#endif
611
				break;
612
			}
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		}
614 615
		spin_unlock(&GlobalMid_Lock);
		if (task_to_wake) {
616 617 618 619 620 621 622 623
			/* Was previous buf put in mpx struct for multi-rsp? */
			if(!isMultiRsp) {
				/* smb buffer will be freed by user thread */
				if(isLargeBuf) {
					bigbuf = NULL;
				} else
					smallbuf = NULL;
			}
624
			wake_up_process(task_to_wake);
625
		} else if ((is_valid_oplock_break(smb_buffer) == FALSE)
626 627
		    && (isMultiRsp == FALSE)) {                          
			cERROR(1, ("No task to wake, unknown frame rcvd!"));
628 629
			cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
				      sizeof(struct smb_hdr));
630 631 632
		}
	} /* end while !EXITING */

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	spin_lock(&GlobalMid_Lock);
	server->tcpStatus = CifsExiting;
	server->tsk = NULL;
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	/* check if we have blocked requests that need to free */
	/* Note that cifs_max_pending is normally 50, but
	can be set at module install time to as little as two */
	if(atomic_read(&server->inFlight) >= cifs_max_pending)
		atomic_set(&server->inFlight, cifs_max_pending - 1);
	/* We do not want to set the max_pending too low or we
	could end up with the counter going negative */
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	spin_unlock(&GlobalMid_Lock);
	/* Although there should not be any requests blocked on 
	this queue it can not hurt to be paranoid and try to wake up requests
646
	that may haven been blocked when more than 50 at time were on the wire
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	to the same server - they now will see the session is in exit state
	and get out of SendReceive.  */
	wake_up_all(&server->request_q);
	/* give those requests time to exit */
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	msleep(125);
	
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	if(server->ssocket) {
		sock_release(csocket);
		server->ssocket = NULL;
	}
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	/* buffer usuallly freed in free_mid - need to free it here on exit */
	if (bigbuf != NULL)
		cifs_buf_release(bigbuf);
	if (smallbuf != NULL)
		cifs_small_buf_release(smallbuf);
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	read_lock(&GlobalSMBSeslock);
	if (list_empty(&server->pending_mid_q)) {
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		/* loop through server session structures attached to this and
		    mark them dead */
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		list_for_each(tmp, &GlobalSMBSessionList) {
			ses =
			    list_entry(tmp, struct cifsSesInfo,
				       cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
				ses->server = NULL;
			}
		}
		read_unlock(&GlobalSMBSeslock);
	} else {
678 679 680 681 682 683 684 685 686 687 688
		/* although we can not zero the server struct pointer yet,
		since there are active requests which may depnd on them,
		mark the corresponding SMB sessions as exiting too */
		list_for_each(tmp, &GlobalSMBSessionList) {
			ses = list_entry(tmp, struct cifsSesInfo,
					 cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
			}
		}

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		spin_lock(&GlobalMid_Lock);
		list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
			if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
				cFYI(1,
694
				  ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
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				task_to_wake = mid_entry->tsk;
				if(task_to_wake) {
					wake_up_process(task_to_wake);
				}
			}
		}
		spin_unlock(&GlobalMid_Lock);
		read_unlock(&GlobalSMBSeslock);
		/* 1/8th of sec is more than enough time for them to exit */
704
		msleep(125);
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	}

707
	if (!list_empty(&server->pending_mid_q)) {
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		/* mpx threads have not exited yet give them 
		at least the smb send timeout time for long ops */
710 711 712 713
		/* due to delays on oplock break requests, we need
		to wait at least 45 seconds before giving up
		on a request getting a response and going ahead
		and killing cifsd */
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		cFYI(1, ("Wait for exit from demultiplex thread"));
715
		msleep(46000);
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		/* if threads still have not exited they are probably never
		coming home not much else we can do but free the memory */
	}

	write_lock(&GlobalSMBSeslock);
	atomic_dec(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
723 724 725 726 727 728 729 730 731 732 733 734

	/* last chance to mark ses pointers invalid
	if there are any pointing to this (e.g
	if a crazy root user tried to kill cifsd 
	kernel thread explicitly this might happen) */
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo,
				cifsSessionList);
		if (ses->server == server) {
			ses->server = NULL;
		}
	}
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	write_unlock(&GlobalSMBSeslock);
736 737

	kfree(server);
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	if(length  > 0) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}
743
	
744
	complete_and_exit(&cifsd_complete, 0);
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	return 0;
}

static int
cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
{
	char *value;
	char *data;
	unsigned int  temp_len, i, j;
	char separator[2];

	separator[0] = ',';
	separator[1] = 0; 

	memset(vol->source_rfc1001_name,0x20,15);
	for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
		/* does not have to be a perfect mapping since the field is
		informational, only used for servers that do not support
		port 445 and it can be overridden at mount time */
764 765
		vol->source_rfc1001_name[i] = 
			toupper(system_utsname.nodename[i]);
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	}
	vol->source_rfc1001_name[15] = 0;
768 769 770
	/* null target name indicates to use *SMBSERVR default called name
	   if we end up sending RFC1001 session initialize */
	vol->target_rfc1001_name[0] = 0;
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	vol->linux_uid = current->uid;	/* current->euid instead? */
	vol->linux_gid = current->gid;
	vol->dir_mode = S_IRWXUGO;
	/* 2767 perms indicate mandatory locking support */
	vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);

	/* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
	vol->rw = TRUE;

780 781 782
	/* default is always to request posix paths. */
	vol->posix_paths = 1;

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	if (!options)
		return 1;

	if(strncmp(options,"sep=",4) == 0) {
		if(options[4] != 0) {
			separator[0] = options[4];
			options += 5;
		} else {
			cFYI(1,("Null separator not allowed"));
		}
	}
		
	while ((data = strsep(&options, separator)) != NULL) {
		if (!*data)
			continue;
		if ((value = strchr(data, '=')) != NULL)
			*value++ = '\0';

		if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
			vol->no_xattr = 0;
		} else if (strnicmp(data, "nouser_xattr",12) == 0) {
			vol->no_xattr = 1;
		} else if (strnicmp(data, "user", 4) == 0) {
			if (!value || !*value) {
				printk(KERN_WARNING
				       "CIFS: invalid or missing username\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 200) < 200) {
				vol->username = value;
			} else {
				printk(KERN_WARNING "CIFS: username too long\n");
				return 1;
			}
		} else if (strnicmp(data, "pass", 4) == 0) {
			if (!value) {
				vol->password = NULL;
				continue;
			} else if(value[0] == 0) {
				/* check if string begins with double comma
				   since that would mean the password really
				   does start with a comma, and would not
				   indicate an empty string */
				if(value[1] != separator[0]) {
					vol->password = NULL;
					continue;
				}
			}
			temp_len = strlen(value);
			/* removed password length check, NTLM passwords
				can be arbitrarily long */

			/* if comma in password, the string will be 
			prematurely null terminated.  Commas in password are
			specified across the cifs mount interface by a double
			comma ie ,, and a comma used as in other cases ie ','
			as a parameter delimiter/separator is single and due
			to the strsep above is temporarily zeroed. */

			/* NB: password legally can have multiple commas and
			the only illegal character in a password is null */

845 846
			if ((value[temp_len] == 0) && 
			    (value[temp_len+1] == separator[0])) {
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				/* reinsert comma */
				value[temp_len] = separator[0];
				temp_len+=2;  /* move after the second comma */
				while(value[temp_len] != 0)  {
					if (value[temp_len] == separator[0]) {
852 853 854 855
						if (value[temp_len+1] == 
						     separator[0]) {
						/* skip second comma */
							temp_len++;
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						} else { 
						/* single comma indicating start
							 of next parm */
							break;
						}
					}
					temp_len++;
				}
				if(value[temp_len] == 0) {
					options = NULL;
				} else {
					value[temp_len] = 0;
					/* point option to start of next parm */
					options = value + temp_len + 1;
				}
				/* go from value to value + temp_len condensing 
				double commas to singles. Note that this ends up
				allocating a few bytes too many, which is ok */
874
				vol->password = kzalloc(temp_len, GFP_KERNEL);
875 876 877 878
				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
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				for(i=0,j=0;i<temp_len;i++,j++) {
					vol->password[j] = value[i];
881 882
					if(value[i] == separator[0]
						&& value[i+1] == separator[0]) {
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						/* skip second comma */
						i++;
					}
				}
				vol->password[j] = 0;
			} else {
889
				vol->password = kzalloc(temp_len+1, GFP_KERNEL);
890 891 892 893
				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
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				strcpy(vol->password, value);
			}
		} else if (strnicmp(data, "ip", 2) == 0) {
			if (!value || !*value) {
				vol->UNCip = NULL;
			} else if (strnlen(value, 35) < 35) {
				vol->UNCip = value;
			} else {
				printk(KERN_WARNING "CIFS: ip address too long\n");
				return 1;
			}
		} else if ((strnicmp(data, "unc", 3) == 0)
			   || (strnicmp(data, "target", 6) == 0)
			   || (strnicmp(data, "path", 4) == 0)) {
			if (!value || !*value) {
				printk(KERN_WARNING
				       "CIFS: invalid path to network resource\n");
				return 1;	/* needs_arg; */
			}
			if ((temp_len = strnlen(value, 300)) < 300) {
				vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
				if(vol->UNC == NULL)
					return 1;
				strcpy(vol->UNC,value);
				if (strncmp(vol->UNC, "//", 2) == 0) {
					vol->UNC[0] = '\\';
					vol->UNC[1] = '\\';
				} else if (strncmp(vol->UNC, "\\\\", 2) != 0) {	                   
					printk(KERN_WARNING
					       "CIFS: UNC Path does not begin with // or \\\\ \n");
					return 1;
				}
			} else {
				printk(KERN_WARNING "CIFS: UNC name too long\n");
				return 1;
			}
		} else if ((strnicmp(data, "domain", 3) == 0)
			   || (strnicmp(data, "workgroup", 5) == 0)) {
			if (!value || !*value) {
				printk(KERN_WARNING "CIFS: invalid domain name\n");
				return 1;	/* needs_arg; */
			}
			/* BB are there cases in which a comma can be valid in
			a domain name and need special handling? */
			if (strnlen(value, 65) < 65) {
				vol->domainname = value;
				cFYI(1, ("Domain name set"));
			} else {
				printk(KERN_WARNING "CIFS: domain name too long\n");
				return 1;
			}
		} else if (strnicmp(data, "iocharset", 9) == 0) {
			if (!value || !*value) {
				printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 65) < 65) {
				if(strnicmp(value,"default",7))
					vol->iocharset = value;
				/* if iocharset not set load_nls_default used by caller */
				cFYI(1, ("iocharset set to %s",value));
			} else {
				printk(KERN_WARNING "CIFS: iocharset name too long.\n");
				return 1;
			}
		} else if (strnicmp(data, "uid", 3) == 0) {
			if (value && *value) {
				vol->linux_uid =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "gid", 3) == 0) {
			if (value && *value) {
				vol->linux_gid =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "file_mode", 4) == 0) {
			if (value && *value) {
				vol->file_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "dir_mode", 4) == 0) {
			if (value && *value) {
				vol->dir_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "dirmode", 4) == 0) {
			if (value && *value) {
				vol->dir_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "port", 4) == 0) {
			if (value && *value) {
				vol->port =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "rsize", 5) == 0) {
			if (value && *value) {
				vol->rsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "wsize", 5) == 0) {
			if (value && *value) {
				vol->wsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "sockopt", 5) == 0) {
			if (value && *value) {
				vol->sockopt =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "netbiosname", 4) == 0) {
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("invalid (empty) netbiosname specified"));
			} else {
				memset(vol->source_rfc1001_name,0x20,15);
				for(i=0;i<15;i++) {
				/* BB are there cases in which a comma can be 
				valid in this workstation netbios name (and need
				special handling)? */

				/* We do not uppercase netbiosname for user */
					if (value[i]==0)
						break;
					else 
						vol->source_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				set at top of the function  */
				if((i==15) && (value[i] != 0))
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
					printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
			}
		} else if (strnicmp(data, "servern", 7) == 0) {
			/* servernetbiosname specified override *SMBSERVER */
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("empty server netbiosname specified"));
			} else {
				/* last byte, type, is 0x20 for servr type */
				memset(vol->target_rfc1001_name,0x20,16);

				for(i=0;i<15;i++) {
				/* BB are there cases in which a comma can be
				   valid in this workstation netbios name (and need
				   special handling)? */

				/* user or mount helper must uppercase netbiosname */
					if (value[i]==0)
						break;
					else
						vol->target_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				   set at top of the function  */
				if((i==15) && (value[i] != 0))
					printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
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			}
		} else if (strnicmp(data, "credentials", 4) == 0) {
			/* ignore */
		} else if (strnicmp(data, "version", 3) == 0) {
			/* ignore */
		} else if (strnicmp(data, "guest",5) == 0) {
			/* ignore */
		} else if (strnicmp(data, "rw", 2) == 0) {
			vol->rw = TRUE;
		} else if ((strnicmp(data, "suid", 4) == 0) ||
				   (strnicmp(data, "nosuid", 6) == 0) ||
				   (strnicmp(data, "exec", 4) == 0) ||
				   (strnicmp(data, "noexec", 6) == 0) ||
				   (strnicmp(data, "nodev", 5) == 0) ||
				   (strnicmp(data, "noauto", 6) == 0) ||
				   (strnicmp(data, "dev", 3) == 0)) {
			/*  The mount tool or mount.cifs helper (if present)
				uses these opts to set flags, and the flags are read
				by the kernel vfs layer before we get here (ie
				before read super) so there is no point trying to
				parse these options again and set anything and it
				is ok to just ignore them */
			continue;
		} else if (strnicmp(data, "ro", 2) == 0) {
			vol->rw = FALSE;
		} else if (strnicmp(data, "hard", 4) == 0) {
			vol->retry = 1;
		} else if (strnicmp(data, "soft", 4) == 0) {
			vol->retry = 0;
		} else if (strnicmp(data, "perm", 4) == 0) {
			vol->noperm = 0;
		} else if (strnicmp(data, "noperm", 6) == 0) {
			vol->noperm = 1;
1081 1082 1083 1084
		} else if (strnicmp(data, "mapchars", 8) == 0) {
			vol->remap = 1;
		} else if (strnicmp(data, "nomapchars", 10) == 0) {
			vol->remap = 0;
1085 1086 1087 1088
                } else if (strnicmp(data, "sfu", 3) == 0) {
                        vol->sfu_emul = 1;
                } else if (strnicmp(data, "nosfu", 5) == 0) {
                        vol->sfu_emul = 0;
1089 1090 1091 1092
		} else if (strnicmp(data, "posixpaths", 10) == 0) {
			vol->posix_paths = 1;
		} else if (strnicmp(data, "noposixpaths", 12) == 0) {
			vol->posix_paths = 0;
1093 1094
                } else if ((strnicmp(data, "nocase", 6) == 0) ||
			   (strnicmp(data, "ignorecase", 10)  == 0)) {
1095 1096 1097
                        vol->nocase = 1;
		} else if (strnicmp(data, "brl", 3) == 0) {
			vol->nobrl =  0;
1098
		} else if ((strnicmp(data, "nobrl", 5) == 0) || 
1099
			   (strnicmp(data, "nolock", 6) == 0)) {
1100
			vol->nobrl =  1;
1101 1102 1103 1104 1105
			/* turn off mandatory locking in mode
			if remote locking is turned off since the
			local vfs will do advisory */
			if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
				vol->file_mode = S_IALLUGO;
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		} else if (strnicmp(data, "setuids", 7) == 0) {
			vol->setuids = 1;
		} else if (strnicmp(data, "nosetuids", 9) == 0) {
			vol->setuids = 0;
		} else if (strnicmp(data, "nohard", 6) == 0) {
			vol->retry = 0;
		} else if (strnicmp(data, "nosoft", 6) == 0) {
			vol->retry = 1;
		} else if (strnicmp(data, "nointr", 6) == 0) {
			vol->intr = 0;
		} else if (strnicmp(data, "intr", 4) == 0) {
			vol->intr = 1;
		} else if (strnicmp(data, "serverino",7) == 0) {
			vol->server_ino = 1;
		} else if (strnicmp(data, "noserverino",9) == 0) {
			vol->server_ino = 0;
		} else if (strnicmp(data, "acl",3) == 0) {
			vol->no_psx_acl = 0;
		} else if (strnicmp(data, "noacl",5) == 0) {
			vol->no_psx_acl = 1;
		} else if (strnicmp(data, "direct",6) == 0) {
			vol->direct_io = 1;
		} else if (strnicmp(data, "forcedirectio",13) == 0) {
			vol->direct_io = 1;
		} else if (strnicmp(data, "in6_addr",8) == 0) {
			if (!value || !*value) {
				vol->in6_addr = NULL;
			} else if (strnlen(value, 49) == 48) {
				vol->in6_addr = value;
			} else {
				printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
				return 1;
			}
		} else if (strnicmp(data, "noac", 4) == 0) {
			printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
		} else
			printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
	}
	if (vol->UNC == NULL) {
		if(devname == NULL) {
			printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
			return 1;
		}
		if ((temp_len = strnlen(devname, 300)) < 300) {
			vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
			if(vol->UNC == NULL)
				return 1;
			strcpy(vol->UNC,devname);
			if (strncmp(vol->UNC, "//", 2) == 0) {
				vol->UNC[0] = '\\';
				vol->UNC[1] = '\\';
			} else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
				printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
				return 1;
			}
		} else {
			printk(KERN_WARNING "CIFS: UNC name too long\n");
			return 1;
		}
	}
	if(vol->UNCip == NULL)
		vol->UNCip = &vol->UNC[2];

	return 0;
}

static struct cifsSesInfo *
cifs_find_tcp_session(struct in_addr * target_ip_addr, 
		struct in6_addr *target_ip6_addr,
		 char *userName, struct TCP_Server_Info **psrvTcp)
{
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	*psrvTcp = NULL;
	read_lock(&GlobalSMBSeslock);

	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
		if (ses->server) {
			if((target_ip_addr && 
				(ses->server->addr.sockAddr.sin_addr.s_addr
				  == target_ip_addr->s_addr)) || (target_ip6_addr
				&& memcmp(&ses->server->addr.sockAddr6.sin6_addr,
					target_ip6_addr,sizeof(*target_ip6_addr)))){
				/* BB lock server and tcp session and increment use count here?? */
				*psrvTcp = ses->server;	/* found a match on the TCP session */
				/* BB check if reconnection needed */
				if (strncmp
				    (ses->userName, userName,
				     MAX_USERNAME_SIZE) == 0){
					read_unlock(&GlobalSMBSeslock);
					return ses;	/* found exact match on both tcp and SMB sessions */
				}
			}
		}
		/* else tcp and smb sessions need reconnection */
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

static struct cifsTconInfo *
find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
{
	struct list_head *tmp;
	struct cifsTconInfo *tcon;

	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalTreeConnectionList) {
		cFYI(1, ("Next tcon - "));
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if (tcon->ses) {
			if (tcon->ses->server) {
				cFYI(1,
				     (" old ip addr: %x == new ip %x ?",
				      tcon->ses->server->addr.sockAddr.sin_addr.
				      s_addr, new_target_ip_addr));
				if (tcon->ses->server->addr.sockAddr.sin_addr.
				    s_addr == new_target_ip_addr) {
	/* BB lock tcon and server and tcp session and increment use count here? */
					/* found a match on the TCP session */
					/* BB check if reconnection needed */
					cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
					      tcon->treeName, uncName));
					if (strncmp
					    (tcon->treeName, uncName,
					     MAX_TREE_SIZE) == 0) {
						cFYI(1,
						     ("Matched UNC, old user: %s == new: %s ?",
						      tcon->treeName, uncName));
						if (strncmp
						    (tcon->ses->userName,
						     userName,
						     MAX_USERNAME_SIZE) == 0) {
							read_unlock(&GlobalSMBSeslock);
							return tcon;/* also matched user (smb session)*/
						}
					}
				}
			}
		}
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

int
connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1254 1255
		    const char *old_path, const struct nls_table *nls_codepage,
		    int remap)
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{
	unsigned char *referrals = NULL;
	unsigned int num_referrals;
	int rc = 0;

	rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage, 
1262
			&num_referrals, &referrals, remap);
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	/* BB Add in code to: if valid refrl, if not ip address contact
		the helper that resolves tcp names, mount to it, try to 
		tcon to it unmount it if fail */

	if(referrals)
		kfree(referrals);

	return rc;
}

int
get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
			const char *old_path, const struct nls_table *nls_codepage, 
1277 1278
			unsigned int *pnum_referrals, 
			unsigned char ** preferrals, int remap)
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{
	char *temp_unc;
	int rc = 0;

	*pnum_referrals = 0;

	if (pSesInfo->ipc_tid == 0) {
		temp_unc = kmalloc(2 /* for slashes */ +
			strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
				 + 1 + 4 /* slash IPC$ */  + 2,
				GFP_KERNEL);
		if (temp_unc == NULL)
			return -ENOMEM;
		temp_unc[0] = '\\';
		temp_unc[1] = '\\';
		strcpy(temp_unc + 2, pSesInfo->serverName);
		strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
		rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
		cFYI(1,
		     ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
		kfree(temp_unc);
	}
	if (rc == 0)
		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1303
				     pnum_referrals, nls_codepage, remap);
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	return rc;
}

/* See RFC1001 section 14 on representation of Netbios names */
static void rfc1002mangle(char * target,char * source, unsigned int length)
{
	unsigned int i,j;

	for(i=0,j=0;i<(length);i++) {
		/* mask a nibble at a time and encode */
		target[j] = 'A' + (0x0F & (source[i] >> 4));
		target[j+1] = 'A' + (0x0F & source[i]);
		j+=2;
	}

}


static int
ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket, 
1325
	     char * netbios_name, char * target_name)
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{
	int rc = 0;
	int connected = 0;
	__be16 orig_port = 0;

	if(*csocket == NULL) {
		rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
		if (rc < 0) {
			cERROR(1, ("Error %d creating socket",rc));
			*csocket = NULL;
			return rc;
		} else {
		/* BB other socket options to set KEEPALIVE, NODELAY? */
			cFYI(1,("Socket created"));
			(*csocket)->sk->sk_allocation = GFP_NOFS; 
		}
	}

	psin_server->sin_family = AF_INET;
	if(psin_server->sin_port) { /* user overrode default port */
		rc = (*csocket)->ops->connect(*csocket,
				(struct sockaddr *) psin_server,
				sizeof (struct sockaddr_in),0);
		if (rc >= 0)
			connected = 1;
	} 

	if(!connected) {
		/* save original port so we can retry user specified port  
			later if fall back ports fail this time  */
		orig_port = psin_server->sin_port;

		/* do not retry on the same port we just failed on */
		if(psin_server->sin_port != htons(CIFS_PORT)) {
			psin_server->sin_port = htons(CIFS_PORT);

			rc = (*csocket)->ops->connect(*csocket,
					(struct sockaddr *) psin_server,
					sizeof (struct sockaddr_in),0);
			if (rc >= 0)
				connected = 1;
		}
	}
	if (!connected) {
		psin_server->sin_port = htons(RFC1001_PORT);
		rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
					      psin_server, sizeof (struct sockaddr_in),0);
		if (rc >= 0) 
			connected = 1;
	}

	/* give up here - unless we want to retry on different
		protocol families some day */
	if (!connected) {
		if(orig_port)
			psin_server->sin_port = orig_port;
		cFYI(1,("Error %d connecting to server via ipv4",rc));
		sock_release(*csocket);
		*csocket = NULL;
		return rc;
	}
	/* Eventually check for other socket options to change from 
		the default. sock_setsockopt not used because it expects 
		user space buffer */
1390 1391
	 cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
		 (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
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	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1393 1394 1395 1396 1397
	/* make the bufsizes depend on wsize/rsize and max requests */
	if((*csocket)->sk->sk_sndbuf < (200 * 1024))
		(*csocket)->sk->sk_sndbuf = 200 * 1024;
	if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
		(*csocket)->sk->sk_rcvbuf = 140 * 1024;
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	/* send RFC1001 sessinit */
	if(psin_server->sin_port == htons(RFC1001_PORT)) {
		/* some servers require RFC1001 sessinit before sending
		negprot - BB check reconnection in case where second 
		sessinit is sent but no second negprot */
		struct rfc1002_session_packet * ses_init_buf;
		struct smb_hdr * smb_buf;
1406
		ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
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		if(ses_init_buf) {
			ses_init_buf->trailer.session_req.called_len = 32;
1409 1410 1411 1412 1413 1414 1415 1416
			if(target_name && (target_name[0] != 0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					target_name, 16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					DEFAULT_CIFS_CALLED_NAME,16);
			}

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			ses_init_buf->trailer.session_req.calling_len = 32;
			/* calling name ends in null (byte 16) from old smb
			convention. */
			if(netbios_name && (netbios_name[0] !=0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
					netbios_name,16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
					"LINUX_CIFS_CLNT",16);
			}
			ses_init_buf->trailer.session_req.scope1 = 0;
			ses_init_buf->trailer.session_req.scope2 = 0;
			smb_buf = (struct smb_hdr *)ses_init_buf;
			/* sizeof RFC1002_SESSION_REQUEST with no scope */
			smb_buf->smb_buf_length = 0x81000044;
			rc = smb_send(*csocket, smb_buf, 0x44,
				(struct sockaddr *)psin_server);
			kfree(ses_init_buf);
		}
		/* else the negprot may still work without this 
		even though malloc failed */
		
	}
		
	return rc;
}

static int
ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
{
	int rc = 0;
	int connected = 0;
	__be16 orig_port = 0;

	if(*csocket == NULL) {
		rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
		if (rc < 0) {
			cERROR(1, ("Error %d creating ipv6 socket",rc));
			*csocket = NULL;
			return rc;
		} else {
		/* BB other socket options to set KEEPALIVE, NODELAY? */
			 cFYI(1,("ipv6 Socket created"));
			(*csocket)->sk->sk_allocation = GFP_NOFS;
		}
	}

	psin_server->sin6_family = AF_INET6;

	if(psin_server->sin6_port) { /* user overrode default port */
		rc = (*csocket)->ops->connect(*csocket,
				(struct sockaddr *) psin_server,
				sizeof (struct sockaddr_in6),0);
		if (rc >= 0)
			connected = 1;
	} 

	if(!connected) {
		/* save original port so we can retry user specified port  
			later if fall back ports fail this time  */

		orig_port = psin_server->sin6_port;
		/* do not retry on the same port we just failed on */
		if(psin_server->sin6_port != htons(CIFS_PORT)) {
			psin_server->sin6_port = htons(CIFS_PORT);

			rc = (*csocket)->ops->connect(*csocket,
					(struct sockaddr *) psin_server,
					sizeof (struct sockaddr_in6),0);
			if (rc >= 0)
				connected = 1;
		}
	}
	if (!connected) {
		psin_server->sin6_port = htons(RFC1001_PORT);
		rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
					 psin_server, sizeof (struct sockaddr_in6),0);
		if (rc >= 0) 
			connected = 1;
	}

	/* give up here - unless we want to retry on different
		protocol families some day */
	if (!connected) {
		if(orig_port)
			psin_server->sin6_port = orig_port;
		cFYI(1,("Error %d connecting to server via ipv6",rc));
		sock_release(*csocket);
		*csocket = NULL;
		return rc;
	}
	/* Eventually check for other socket options to change from 
		the default. sock_setsockopt not used because it expects 
		user space buffer */
	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
		
	return rc;
}

int
cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
	   char *mount_data, const char *devname)
{
	int rc = 0;
	int xid;
	int address_type = AF_INET;
	struct socket *csocket = NULL;
	struct sockaddr_in sin_server;
	struct sockaddr_in6 sin_server6;
	struct smb_vol volume_info;
	struct cifsSesInfo *pSesInfo = NULL;
	struct cifsSesInfo *existingCifsSes = NULL;
	struct cifsTconInfo *tcon = NULL;
	struct TCP_Server_Info *srvTcp = NULL;

	xid = GetXid();

/* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
	
	memset(&volume_info,0,sizeof(struct smb_vol));
	if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	}

	if (volume_info.username) {
		/* BB fixme parse for domain name here */
		cFYI(1, ("Username: %s ", volume_info.username));

	} else {
		cifserror("No username specified ");
        /* In userspace mount helper we can get user name from alternate
           locations such as env variables and files on disk */
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	}

	if (volume_info.UNCip && volume_info.UNC) {
		rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);

		if(rc <= 0) {
			/* not ipv4 address, try ipv6 */
			rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u); 
			if(rc > 0)
				address_type = AF_INET6;
		} else {
			address_type = AF_INET;
		}
       
		if(rc <= 0) {
			/* we failed translating address */
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			FreeXid(xid);
			return -EINVAL;
		}

		cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
		/* success */
		rc = 0;
	} else if (volume_info.UNCip){
		/* BB using ip addr as server name connect to the DFS root below */
		cERROR(1,("Connecting to DFS root not implemented yet"));
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	} else /* which servers DFS root would we conect to */ {
		cERROR(1,
		       ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified  "));
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	}

	/* this is needed for ASCII cp to Unicode converts */
	if(volume_info.iocharset == NULL) {
		cifs_sb->local_nls = load_nls_default();
	/* load_nls_default can not return null */
	} else {
		cifs_sb->local_nls = load_nls(volume_info.iocharset);
		if(cifs_sb->local_nls == NULL) {
			cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			FreeXid(xid);
			return -ELIBACC;
		}
	}

	if(address_type == AF_INET)
		existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
			NULL /* no ipv6 addr */,
			volume_info.username, &srvTcp);
	else if(address_type == AF_INET6)
		existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
			&sin_server6.sin6_addr,
			volume_info.username, &srvTcp);
	else {
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	}


	if (srvTcp) {
		cFYI(1, ("Existing tcp session with server found "));                
	} else {	/* create socket */
		if(volume_info.port)
			sin_server.sin_port = htons(volume_info.port);
		else
			sin_server.sin_port = 0;
1649 1650 1651
		rc = ipv4_connect(&sin_server,&csocket,
				  volume_info.source_rfc1001_name,
				  volume_info.target_rfc1001_name);
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		if (rc < 0) {
			cERROR(1,
			       ("Error connecting to IPv4 socket. Aborting operation"));
			if(csocket != NULL)
				sock_release(csocket);
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			FreeXid(xid);
			return rc;
		}

		srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
		if (srvTcp == NULL) {
			rc = -ENOMEM;
			sock_release(csocket);
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			FreeXid(xid);
			return rc;
		} else {
			memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
			memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
			atomic_set(&srvTcp->inFlight,0);
			/* BB Add code for ipv6 case too */
			srvTcp->ssocket = csocket;
			srvTcp->protocolType = IPV4;
			init_waitqueue_head(&srvTcp->response_q);
			init_waitqueue_head(&srvTcp->request_q);
			INIT_LIST_HEAD(&srvTcp->pending_mid_q);
			/* at this point we are the only ones with the pointer
			to the struct since the kernel thread not created yet
			so no need to spinlock this init of tcpStatus */
			srvTcp->tcpStatus = CifsNew;
			init_MUTEX(&srvTcp->tcpSem);
			rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
				      CLONE_FS | CLONE_FILES | CLONE_VM);
			if(rc < 0) {
				rc = -ENOMEM;
				sock_release(csocket);
				if(volume_info.UNC)
					kfree(volume_info.UNC);
				if(volume_info.password)
					kfree(volume_info.password);
				FreeXid(xid);
				return rc;
1701 1702 1703
			}
			wait_for_completion(&cifsd_complete);
			rc = 0;
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			memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1705
			memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1706
			srvTcp->sequence_number = 0;
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		}
	}

	if (existingCifsSes) {
		pSesInfo = existingCifsSes;
		cFYI(1, ("Existing smb sess found "));
		if(volume_info.password)
			kfree(volume_info.password);
		/* volume_info.UNC freed at end of function */
	} else if (!rc) {
		cFYI(1, ("Existing smb sess not found "));
		pSesInfo = sesInfoAlloc();
		if (pSesInfo == NULL)
			rc = -ENOMEM;
		else {
			pSesInfo->server = srvTcp;
			sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
				NIPQUAD(sin_server.sin_addr.s_addr));
		}

		if (!rc){
			/* volume_info.password freed at unmount */   
			if (volume_info.password)
				pSesInfo->password = volume_info.password;
			if (volume_info.username)
				strncpy(pSesInfo->userName,
					volume_info.username,MAX_USERNAME_SIZE);
			if (volume_info.domainname)
				strncpy(pSesInfo->domainName,
					volume_info.domainname,MAX_USERNAME_SIZE);
			pSesInfo->linux_uid = volume_info.linux_uid;
			down(&pSesInfo->sesSem);
			rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
			up(&pSesInfo->sesSem);
			if(!rc)
				atomic_inc(&srvTcp->socketUseCount);
		} else
			if(volume_info.password)
				kfree(volume_info.password);
	}
    
	/* search for existing tcon to this server share */
	if (!rc) {
1750 1751 1752 1753 1754
		if(volume_info.rsize > CIFSMaxBufSize) {
			cERROR(1,("rsize %d too large, using MaxBufSize",
				volume_info.rsize));
			cifs_sb->rsize = CIFSMaxBufSize;
		} else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
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			cifs_sb->rsize = volume_info.rsize;
1756 1757 1758 1759 1760 1761 1762 1763
		else /* default */
			cifs_sb->rsize = CIFSMaxBufSize;

		if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
			cERROR(1,("wsize %d too large using 4096 instead",
				  volume_info.wsize));
			cifs_sb->wsize = 4096;
		} else if(volume_info.wsize)
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			cifs_sb->wsize = volume_info.wsize;
		else
			cifs_sb->wsize = CIFSMaxBufSize; /* default */
		if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
1768 1769 1770
			cifs_sb->rsize = PAGE_CACHE_SIZE; 
			/* Windows ME does this */
			cFYI(1,("Attempt to set readsize for mount to less than one page (4096)"));
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		}
		cifs_sb->mnt_uid = volume_info.linux_uid;
		cifs_sb->mnt_gid = volume_info.linux_gid;
		cifs_sb->mnt_file_mode = volume_info.file_mode;
		cifs_sb->mnt_dir_mode = volume_info.dir_mode;
		cFYI(1,("file mode: 0x%x  dir mode: 0x%x",cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));

		if(volume_info.noperm)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
		if(volume_info.setuids)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
		if(volume_info.server_ino)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1784 1785
		if(volume_info.remap)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
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		if(volume_info.no_xattr)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1788 1789
		if(volume_info.sfu_emul)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1790 1791
		if(volume_info.nobrl)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1792

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		if(volume_info.direct_io) {
1794
			cFYI(1,("mounting share using direct i/o"));
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			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
		}

		tcon =
		    find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
			     volume_info.username);
		if (tcon) {
			cFYI(1, ("Found match on UNC path "));
			/* we can have only one retry value for a connection
			   to a share so for resources mounted more than once
			   to the same server share the last value passed in 
			   for the retry flag is used */
			tcon->retry = volume_info.retry;
1808
			tcon->nocase = volume_info.nocase;
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		} else {
			tcon = tconInfoAlloc();
			if (tcon == NULL)
				rc = -ENOMEM;
			else {
				/* check for null share name ie connect to dfs root */

				/* BB check if this works for exactly length three strings */
				if ((strchr(volume_info.UNC + 3, '\\') == NULL)
				    && (strchr(volume_info.UNC + 3, '/') ==
					NULL)) {
1820 1821 1822 1823
					rc = connect_to_dfs_path(xid, pSesInfo,
							"", cifs_sb->local_nls,
							cifs_sb->mnt_cifs_flags & 
							  CIFS_MOUNT_MAP_SPECIAL_CHR);
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					if(volume_info.UNC)
						kfree(volume_info.UNC);
					FreeXid(xid);
					return -ENODEV;
				} else {
					rc = CIFSTCon(xid, pSesInfo, 
						volume_info.UNC,
						tcon, cifs_sb->local_nls);
					cFYI(1, ("CIFS Tcon rc = %d", rc));
				}
				if (!rc) {
					atomic_inc(&pSesInfo->inUse);
					tcon->retry = volume_info.retry;
1837
					tcon->nocase = volume_info.nocase;
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				}
			}
		}
	}
	if(pSesInfo) {
		if (pSesInfo->capabilities & CAP_LARGE_FILES) {
			sb->s_maxbytes = (u64) 1 << 63;
		} else
			sb->s_maxbytes = (u64) 1 << 31;	/* 2 GB */
	}

	sb->s_time_gran = 100;

/* on error free sesinfo and tcon struct if needed */
	if (rc) {
		/* if session setup failed, use count is zero but
		we still need to free cifsd thread */
		if(atomic_read(&srvTcp->socketUseCount) == 0) {
			spin_lock(&GlobalMid_Lock);
			srvTcp->tcpStatus = CifsExiting;
			spin_unlock(&GlobalMid_Lock);
1859
			if(srvTcp->tsk) {
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				send_sig(SIGKILL,srvTcp->tsk,1);
1861 1862
				wait_for_completion(&cifsd_complete);
			}
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		}
		 /* If find_unc succeeded then rc == 0 so we can not end */
		if (tcon)  /* up accidently freeing someone elses tcon struct */
			tconInfoFree(tcon);
		if (existingCifsSes == NULL) {
			if (pSesInfo) {
				if ((pSesInfo->server) && 
				    (pSesInfo->status == CifsGood)) {
					int temp_rc;
					temp_rc = CIFSSMBLogoff(xid, pSesInfo);
					/* if the socketUseCount is now zero */
					if((temp_rc == -ESHUTDOWN) &&
1875
					   (pSesInfo->server->tsk)) {
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						send_sig(SIGKILL,pSesInfo->server->tsk,1);
1877 1878
						wait_for_completion(&cifsd_complete);
					}
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				} else
					cFYI(1, ("No session or bad tcon"));
				sesInfoFree(pSesInfo);
				/* pSesInfo = NULL; */
			}
		}
	} else {
		atomic_inc(&tcon->useCount);
		cifs_sb->tcon = tcon;
		tcon->ses = pSesInfo;

		/* do not care if following two calls succeed - informational only */
1891 1892
		CIFSSMBQFSDeviceInfo(xid, tcon);
		CIFSSMBQFSAttributeInfo(xid, tcon);
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		if (tcon->ses->capabilities & CAP_UNIX) {
1894
			if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
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				if(!volume_info.no_psx_acl) {
					if(CIFS_UNIX_POSIX_ACL_CAP & 
					   le64_to_cpu(tcon->fsUnixInfo.Capability))
						cFYI(1,("server negotiated posix acl support"));
						sb->s_flags |= MS_POSIXACL;
				}
1901 1902 1903 1904

				/* Try and negotiate POSIX pathnames if we can. */
				if (volume_info.posix_paths && (CIFS_UNIX_POSIX_PATHNAMES_CAP &
				    le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1905
					if (!CIFSSMBSetFSUnixInfo(xid, tcon, CIFS_UNIX_POSIX_PATHNAMES_CAP))  {
1906 1907 1908 1909 1910 1911
						cFYI(1,("negotiated posix pathnames support"));
						cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
					} else {
						cFYI(1,("posix pathnames support requested but not supported"));
					}
				}
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			}
		}
1914 1915 1916 1917
		if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
			cifs_sb->wsize = min(cifs_sb->wsize,
					     (tcon->ses->server->maxBuf -
					      MAX_CIFS_HDR_SIZE));
1918 1919 1920 1921
		if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
                        cifs_sb->rsize = min(cifs_sb->rsize,
                                             (tcon->ses->server->maxBuf -
                                              MAX_CIFS_HDR_SIZE));
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	}

	/* volume_info.password is freed above when existing session found
	(in which case it is not needed anymore) but when new sesion is created
	the password ptr is put in the new session structure (in which case the
	password will be freed at unmount time) */
	if(volume_info.UNC)
		kfree(volume_info.UNC);
	FreeXid(xid);
	return rc;
}

static int
CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
	      char session_key[CIFS_SESSION_KEY_SIZE],
	      const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *user;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	__u32 capabilities;
	__u16 count;

	cFYI(1, ("In sesssetup "));
	if(ses == NULL)
		return -EINVAL;
	user = ses->userName;
	domain = ses->domainName;
	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 13 /* wct */ );

1969
	smb_buffer->Mid = GetNextMid(ses->server);
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	pSMB->req_no_secext.AndXCommand = 0xFF;
	pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
		CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);

	pSMB->req_no_secext.CaseInsensitivePasswordLength = 
		cpu_to_le16(CIFS_SESSION_KEY_SIZE);

	pSMB->req_no_secext.CaseSensitivePasswordLength =
	    cpu_to_le16(CIFS_SESSION_KEY_SIZE);
	bcc_ptr = pByteArea(smb_buffer);
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
	bcc_ptr += CIFS_SESSION_KEY_SIZE;
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
	bcc_ptr += CIFS_SESSION_KEY_SIZE;

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		if(user == NULL)
			bytes_returned = 0; /* skill null user */
	        else
			bytes_returned =
			        cifs_strtoUCS((wchar_t *) bcc_ptr, user, 100,
					nls_codepage);
		/* convert number of 16 bit words to bytes */
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* trailing null */
		if (domain == NULL)
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr,
					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release,
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
	} else {
		if(user != NULL) {                
		    strncpy(bcc_ptr, user, 200);
		    bcc_ptr += strnlen(user, 200);
		}
		*bcc_ptr = 0;
		bcc_ptr++;
		if (domain == NULL) {
			strcpy(bcc_ptr, "CIFS_LINUX_DOM");
			bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
		} else {
			strncpy(bcc_ptr, domain, 64);
			bcc_ptr += strnlen(domain, 64);
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
	}
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req_no_secext.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);
	if (rc) {
/* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	/* do we want to mark SesInfo struct ? */
		ses->Suid = smb_buffer_response->Uid;	/* UID left in wire format (le) */
		cFYI(1, ("UID = %d ", ses->Suid));
         /* response can have either 3 or 4 word count - Samba sends 3 */
		bcc_ptr = pByteArea(smb_buffer_response);	
		if ((pSMBr->resp.hdr.WordCount == 3)
		    || ((pSMBr->resp.hdr.WordCount == 4)
			&& (blob_len < pSMBr->resp.ByteCount))) {
			if (pSMBr->resp.hdr.WordCount == 4)
				bcc_ptr += blob_len;

			if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
				if ((long) (bcc_ptr) % 2) {
					remaining_words =
					    (BCC(smb_buffer_response) - 1) /2;
					bcc_ptr++;	/* Unicode strings must be word aligned */
				} else {
					remaining_words =
						BCC(smb_buffer_response) / 2;
				}
				len =
				    UniStrnlen((wchar_t *) bcc_ptr,
					       remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
   the end since (at least) WIN2K and Windows XP have a major bug in not null
   terminating last Unicode string in response  */
2104
				ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2105 2106
				if(ses->serverOS == NULL)
					goto sesssetup_nomem;
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				cifs_strfromUCS_le(ses->serverOS,
					   (wchar_t *)bcc_ptr, len,nls_codepage);
				bcc_ptr += 2 * (len + 1);
				remaining_words -= len + 1;
				ses->serverOS[2 * len] = 0;
				ses->serverOS[1 + (2 * len)] = 0;
				if (remaining_words > 0) {
					len = UniStrnlen((wchar_t *)bcc_ptr,
							 remaining_words-1);
2116
					ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2117 2118
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
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					cifs_strfromUCS_le(ses->serverNOS,
							   (wchar_t *)bcc_ptr,len,nls_codepage);
					bcc_ptr += 2 * (len + 1);
					ses->serverNOS[2 * len] = 0;
					ses->serverNOS[1 + (2 * len)] = 0;
					if(strncmp(ses->serverNOS,
						"NT LAN Manager 4",16) == 0) {
						cFYI(1,("NT4 server"));
						ses->flags |= CIFS_SES_NT4;
					}
					remaining_words -= len + 1;
					if (remaining_words > 0) {
2131
						len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
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          /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
						ses->serverDomain =
2134
						    kzalloc(2*(len+1),GFP_KERNEL);
2135 2136
						if(ses->serverDomain == NULL)
							goto sesssetup_nomem;
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						cifs_strfromUCS_le(ses->serverDomain,
						     (wchar_t *)bcc_ptr,len,nls_codepage);
						bcc_ptr += 2 * (len + 1);
						ses->serverDomain[2*len] = 0;
						ses->serverDomain[1+(2*len)] = 0;
					} /* else no more room so create dummy domain string */
					else
2144
						ses->serverDomain = 
2145
							kzalloc(2, GFP_KERNEL);
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				} else {	/* no room so create dummy domain and NOS string */
2147 2148 2149
					/* if these kcallocs fail not much we
					   can do, but better to not fail the
					   sesssetup itself */
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					ses->serverDomain =
2151
					    kzalloc(2, GFP_KERNEL);
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					ses->serverNOS =
2153
					    kzalloc(2, GFP_KERNEL);
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				}
			} else {	/* ASCII */
				len = strnlen(bcc_ptr, 1024);
				if (((long) bcc_ptr + len) - (long)
				    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
2160
					ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2161 2162
					if(ses->serverOS == NULL)
						goto sesssetup_nomem;
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					strncpy(ses->serverOS,bcc_ptr, len);

					bcc_ptr += len;
					bcc_ptr[0] = 0;	/* null terminate the string */
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
2170
					ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
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					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
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					strncpy(ses->serverNOS, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
2179
					ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2180 2181
					if(ses->serverDomain == NULL)
						goto sesssetup_nomem;
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					strncpy(ses->serverDomain, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;
				} else
					cFYI(1,
					     ("Variable field of length %d extends beyond end of smb ",
					      len));
			}
		} else {
			cERROR(1,
			       (" Security Blob Length extends beyond end of SMB"));
		}
	} else {
		cERROR(1,
		       (" Invalid Word count %d: ",
			smb_buffer_response->WordCount));
		rc = -EIO;
	}
2201 2202 2203
sesssetup_nomem:	/* do not return an error on nomem for the info strings,
			   since that could make reconnection harder, and
			   reconnection might be needed to free memory */
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	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}

static int
CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
		char *SecurityBlob,int SecurityBlobLength,
		const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *user;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	__u32 capabilities;
	__u16 count;

	cFYI(1, ("In spnego sesssetup "));
	if(ses == NULL)
		return -EINVAL;
	user = ses->userName;
	domain = ses->domainName;

	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 12 /* wct */ );
2245 2246

	smb_buffer->Mid = GetNextMid(ses->server);
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	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
	pSMB->req.AndXCommand = 0xFF;
	pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
	    CAP_EXTENDED_SECURITY;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req.Capabilities = cpu_to_le32(capabilities);

	pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
	bcc_ptr = pByteArea(smb_buffer);
	memcpy(bcc_ptr, SecurityBlob, SecurityBlobLength);
	bcc_ptr += SecurityBlobLength;

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) {	/* must be word aligned for Unicode strings */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, user, 100, nls_codepage);
		bcc_ptr += 2 * bytes_returned;	/* convert num of 16 bit words to bytes */
		bcc_ptr += 2;	/* trailing null */
		if (domain == NULL)
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr,
					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
	} else {
		strncpy(bcc_ptr, user, 200);
		bcc_ptr += strnlen(user, 200);
		*bcc_ptr = 0;
		bcc_ptr++;
		if (domain == NULL) {
			strcpy(bcc_ptr, "CIFS_LINUX_DOM");
			bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
		} else {
			strncpy(bcc_ptr, domain, 64);
			bcc_ptr += strnlen(domain, 64);
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
	}
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);
	if (rc) {
/*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len =
		    le16_to_cpu(pSMBr->resp.SecurityBlobLength);
		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	/* BB do we want to set anything in SesInfo struct ? */
		if (ses) {
			ses->Suid = smb_buffer_response->Uid;	/* UID left in wire format (le) */
			cFYI(1, ("UID = %d ", ses->Suid));
			bcc_ptr = pByteArea(smb_buffer_response);	/* response can have either 3 or 4 word count - Samba sends 3 */

			/* BB Fix below to make endian neutral !! */

			if ((pSMBr->resp.hdr.WordCount == 3)
			    || ((pSMBr->resp.hdr.WordCount == 4)
				&& (blob_len <
				    pSMBr->resp.ByteCount))) {
				if (pSMBr->resp.hdr.WordCount == 4) {
					bcc_ptr +=
					    blob_len;
					cFYI(1,
					     ("Security Blob Length %d ",
					      blob_len));
				}

				if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
					if ((long) (bcc_ptr) % 2) {
						remaining_words =
						    (BCC(smb_buffer_response)
						     - 1) / 2;
						bcc_ptr++;	/* Unicode strings must be word aligned */
					} else {
						remaining_words =
						    BCC
						    (smb_buffer_response) / 2;
					}
					len =
					    UniStrnlen((wchar_t *) bcc_ptr,
						       remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
   the end since (at least) WIN2K and Windows XP have a major bug in not null
   terminating last Unicode string in response  */
					ses->serverOS =
2382
					    kzalloc(2 * (len + 1), GFP_KERNEL);
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					cifs_strfromUCS_le(ses->serverOS,
							   (wchar_t *)
							   bcc_ptr, len,
							   nls_codepage);
					bcc_ptr += 2 * (len + 1);
					remaining_words -= len + 1;
					ses->serverOS[2 * len] = 0;
					ses->serverOS[1 + (2 * len)] = 0;
					if (remaining_words > 0) {
						len = UniStrnlen((wchar_t *)bcc_ptr,
								 remaining_words
								 - 1);
						ses->serverNOS =
2396
						    kzalloc(2 * (len + 1),
L
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							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->serverNOS,
								   (wchar_t *)bcc_ptr,
								   len,
								   nls_codepage);
						bcc_ptr += 2 * (len + 1);
						ses->serverNOS[2 * len] = 0;
						ses->serverNOS[1 + (2 * len)] = 0;
						remaining_words -= len + 1;
						if (remaining_words > 0) {
							len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);	
                            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2409
							ses->serverDomain = kzalloc(2*(len+1),GFP_KERNEL);
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							cifs_strfromUCS_le(ses->serverDomain,
							     (wchar_t *)bcc_ptr, 
                                 len,
							     nls_codepage);
							bcc_ptr += 2*(len+1);
							ses->serverDomain[2*len] = 0;
							ses->serverDomain[1+(2*len)] = 0;
						} /* else no more room so create dummy domain string */
						else
							ses->serverDomain =
2420
							    kzalloc(2,GFP_KERNEL);
L
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					} else {	/* no room so create dummy domain and NOS string */
2422 2423
						ses->serverDomain = kzalloc(2, GFP_KERNEL);
						ses->serverNOS = kzalloc(2, GFP_KERNEL);
L
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					}
				} else {	/* ASCII */

					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - (long)
					    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
2431
						ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
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						strncpy(ses->serverOS, bcc_ptr, len);

						bcc_ptr += len;
						bcc_ptr[0] = 0;	/* null terminate the string */
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
2439
						ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
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2440 2441 2442 2443 2444 2445
						strncpy(ses->serverNOS, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
2446
						ses->serverDomain = kzalloc(len + 1, GFP_KERNEL);
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						strncpy(ses->serverDomain, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;
					} else
						cFYI(1,
						     ("Variable field of length %d extends beyond end of smb ",
						      len));
				}
			} else {
				cERROR(1,
				       (" Security Blob Length extends beyond end of SMB"));
			}
		} else {
			cERROR(1, ("No session structure passed in."));
		}
	} else {
		cERROR(1,
		       (" Invalid Word count %d: ",
			smb_buffer_response->WordCount));
		rc = -EIO;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}

static int
CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
			      struct cifsSesInfo *ses, int * pNTLMv2_flag,
			      const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
	PNEGOTIATE_MESSAGE SecurityBlob;
	PCHALLENGE_MESSAGE SecurityBlob2;
	__u32 negotiate_flags, capabilities;
	__u16 count;

	cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
	if(ses == NULL)
		return -EINVAL;
	domain = ses->domainName;
	*pNTLMv2_flag = FALSE;
	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
	pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 12 /* wct */ );
2513 2514

	smb_buffer->Mid = GetNextMid(ses->server);
L
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	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
	pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);

	pSMB->req.AndXCommand = 0xFF;
	pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
	    CAP_EXTENDED_SECURITY;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req.Capabilities = cpu_to_le32(capabilities);

	bcc_ptr = (char *) &pSMB->req.SecurityBlob;
	SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
	strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
	SecurityBlob->MessageType = NtLmNegotiate;
	negotiate_flags =
	    NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
	    NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
	    /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
	if(sign_CIFS_PDUs)
		negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
	if(ntlmv2_support)
		negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
	/* setup pointers to domain name and workstation name */
	bcc_ptr += SecurityBlobLength;

	SecurityBlob->WorkstationName.Buffer = 0;
	SecurityBlob->WorkstationName.Length = 0;
	SecurityBlob->WorkstationName.MaximumLength = 0;

	if (domain == NULL) {
		SecurityBlob->DomainName.Buffer = 0;
		SecurityBlob->DomainName.Length = 0;
		SecurityBlob->DomainName.MaximumLength = 0;
	} else {
		__u16 len;
		negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
		strncpy(bcc_ptr, domain, 63);
		len = strnlen(domain, 64);
		SecurityBlob->DomainName.MaximumLength =
		    cpu_to_le16(len);
		SecurityBlob->DomainName.Buffer =
		    cpu_to_le32((long) &SecurityBlob->
				DomainString -
				(long) &SecurityBlob->Signature);
		bcc_ptr += len;
		SecurityBlobLength += len;
		SecurityBlob->DomainName.Length =
		    cpu_to_le16(len);
	}
	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) {
			*bcc_ptr = 0;
			bcc_ptr++;
		}

		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null terminate Linux version */
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null terminate network opsys string */
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null domain */
	} else {		/* ASCII */
		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
		bcc_ptr++;	/* empty domain field */
		*bcc_ptr = 0;
	}
	SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
	pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);

	if (smb_buffer_response->Status.CifsError ==
	    cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
		rc = 0;

	if (rc) {
/*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);

		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	
        /* Do we want to set anything in SesInfo struct when guest login? */

		bcc_ptr = pByteArea(smb_buffer_response);	
        /* response can have either 3 or 4 word count - Samba sends 3 */

		SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
		if (SecurityBlob2->MessageType != NtLmChallenge) {
			cFYI(1,
			     ("Unexpected NTLMSSP message type received %d",
			      SecurityBlob2->MessageType));
		} else if (ses) {
			ses->Suid = smb_buffer_response->Uid; /* UID left in le format */ 
			cFYI(1, ("UID = %d ", ses->Suid));
			if ((pSMBr->resp.hdr.WordCount == 3)
			    || ((pSMBr->resp.hdr.WordCount == 4)
				&& (blob_len <
				    pSMBr->resp.ByteCount))) {

				if (pSMBr->resp.hdr.WordCount == 4) {
					bcc_ptr += blob_len;
					cFYI(1,
					     ("Security Blob Length %d ",
					      blob_len));
				}

				cFYI(1, ("NTLMSSP Challenge rcvd "));

				memcpy(ses->server->cryptKey,
				       SecurityBlob2->Challenge,
				       CIFS_CRYPTO_KEY_SIZE);
				if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
					*pNTLMv2_flag = TRUE;

				if((SecurityBlob2->NegotiateFlags & 
					cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN)) 
					|| (sign_CIFS_PDUs > 1))
						ses->server->secMode |= 
							SECMODE_SIGN_REQUIRED;	
				if ((SecurityBlob2->NegotiateFlags & 
					cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
						ses->server->secMode |= 
							SECMODE_SIGN_ENABLED;

				if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
					if ((long) (bcc_ptr) % 2) {
						remaining_words =
						    (BCC(smb_buffer_response)
						     - 1) / 2;
						bcc_ptr++;	/* Unicode strings must be word aligned */
					} else {
						remaining_words =
						    BCC
						    (smb_buffer_response) / 2;
					}
					len =
					    UniStrnlen((wchar_t *) bcc_ptr,
						       remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
   the end since (at least) WIN2K and Windows XP have a major bug in not null
   terminating last Unicode string in response  */
					ses->serverOS =
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					    kzalloc(2 * (len + 1), GFP_KERNEL);
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					cifs_strfromUCS_le(ses->serverOS,
							   (wchar_t *)
							   bcc_ptr, len,
							   nls_codepage);
					bcc_ptr += 2 * (len + 1);
					remaining_words -= len + 1;
					ses->serverOS[2 * len] = 0;
					ses->serverOS[1 + (2 * len)] = 0;
					if (remaining_words > 0) {
						len = UniStrnlen((wchar_t *)
								 bcc_ptr,
								 remaining_words
								 - 1);
						ses->serverNOS =
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						    kzalloc(2 * (len + 1),
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							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
								   (wchar_t *)
								   bcc_ptr,
								   len,
								   nls_codepage);
						bcc_ptr += 2 * (len + 1);
						ses->serverNOS[2 * len] = 0;
						ses->serverNOS[1 +
							       (2 * len)] = 0;
						remaining_words -= len + 1;
						if (remaining_words > 0) {
							len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);	
           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
							ses->serverDomain =
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							    kzalloc(2 *
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								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
							     (wchar_t *)
							     bcc_ptr, len,
							     nls_codepage);
							bcc_ptr +=
							    2 * (len + 1);
							ses->
							    serverDomain[2
									 * len]
							    = 0;
							ses->
							    serverDomain[1
									 +
									 (2
									  *
									  len)]
							    = 0;
						} /* else no more room so create dummy domain string */
						else
							ses->serverDomain =
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							    kzalloc(2,
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								    GFP_KERNEL);
					} else {	/* no room so create dummy domain and NOS string */
						ses->serverDomain =
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						    kzalloc(2, GFP_KERNEL);
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						ses->serverNOS =
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						    kzalloc(2, GFP_KERNEL);
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					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - (long)
					    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
						ses->serverOS =
2770
						    kzalloc(len + 1,
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							    GFP_KERNEL);
						strncpy(ses->serverOS,
							bcc_ptr, len);

						bcc_ptr += len;
						bcc_ptr[0] = 0;	/* null terminate string */
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
						ses->serverNOS =
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						    kzalloc(len + 1,
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							    GFP_KERNEL);
						strncpy(ses->serverNOS, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
						ses->serverDomain =
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						    kzalloc(len + 1,
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							    GFP_KERNEL);
						strncpy(ses->serverDomain, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;
					} else
						cFYI(1,
						     ("Variable field of length %d extends beyond end of smb ",
						      len));
				}
			} else {
				cERROR(1,
				       (" Security Blob Length extends beyond end of SMB"));
			}
		} else {
			cERROR(1, ("No session structure passed in."));
		}
	} else {
		cERROR(1,
		       (" Invalid Word count %d: ",
			smb_buffer_response->WordCount));
		rc = -EIO;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}
static int
CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
		char *ntlm_session_key, int ntlmv2_flag,
		const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *user;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
	PAUTHENTICATE_MESSAGE SecurityBlob;
	__u32 negotiate_flags, capabilities;
	__u16 count;

	cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
	if(ses == NULL)
		return -EINVAL;
	user = ses->userName;
	domain = ses->domainName;
	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
	pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 12 /* wct */ );
2857 2858

	smb_buffer->Mid = GetNextMid(ses->server);
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	pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
	pSMB->req.AndXCommand = 0xFF;
	pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	pSMB->req.hdr.Uid = ses->Suid;

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
	    CAP_EXTENDED_SECURITY;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req.Capabilities = cpu_to_le32(capabilities);

	bcc_ptr = (char *) &pSMB->req.SecurityBlob;
	SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
	strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
	SecurityBlob->MessageType = NtLmAuthenticate;
	bcc_ptr += SecurityBlobLength;
	negotiate_flags = 
	    NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
	    NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
	    0x80000000 | NTLMSSP_NEGOTIATE_128;
	if(sign_CIFS_PDUs)
		negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
	if(ntlmv2_flag)
		negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;

/* setup pointers to domain name and workstation name */

	SecurityBlob->WorkstationName.Buffer = 0;
	SecurityBlob->WorkstationName.Length = 0;
	SecurityBlob->WorkstationName.MaximumLength = 0;
	SecurityBlob->SessionKey.Length = 0;
	SecurityBlob->SessionKey.MaximumLength = 0;
	SecurityBlob->SessionKey.Buffer = 0;

	SecurityBlob->LmChallengeResponse.Length = 0;
	SecurityBlob->LmChallengeResponse.MaximumLength = 0;
	SecurityBlob->LmChallengeResponse.Buffer = 0;

	SecurityBlob->NtChallengeResponse.Length =
	    cpu_to_le16(CIFS_SESSION_KEY_SIZE);
	SecurityBlob->NtChallengeResponse.MaximumLength =
	    cpu_to_le16(CIFS_SESSION_KEY_SIZE);
	memcpy(bcc_ptr, ntlm_session_key, CIFS_SESSION_KEY_SIZE);
	SecurityBlob->NtChallengeResponse.Buffer =
	    cpu_to_le32(SecurityBlobLength);
	SecurityBlobLength += CIFS_SESSION_KEY_SIZE;
	bcc_ptr += CIFS_SESSION_KEY_SIZE;

	if (ses->capabilities & CAP_UNICODE) {
		if (domain == NULL) {
			SecurityBlob->DomainName.Buffer = 0;
			SecurityBlob->DomainName.Length = 0;
			SecurityBlob->DomainName.MaximumLength = 0;
		} else {
			__u16 len =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,
					  nls_codepage);
			len *= 2;
			SecurityBlob->DomainName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->DomainName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->DomainName.Length =
			    cpu_to_le16(len);
		}
		if (user == NULL) {
			SecurityBlob->UserName.Buffer = 0;
			SecurityBlob->UserName.Length = 0;
			SecurityBlob->UserName.MaximumLength = 0;
		} else {
			__u16 len =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, user, 64,
					  nls_codepage);
			len *= 2;
			SecurityBlob->UserName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->UserName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->UserName.Length =
			    cpu_to_le16(len);
		}

		/* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((wchar_t *) bcc_ptr, "AMACHINE",64, nls_codepage);
		   SecurityBlob->WorkstationName.Length *= 2;
		   SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
		   SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
		   bcc_ptr += SecurityBlob->WorkstationName.Length;
		   SecurityBlobLength += SecurityBlob->WorkstationName.Length;
		   SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */

		if ((long) bcc_ptr % 2) {
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null term version string */
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null terminate network opsys string */
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null domain */
	} else {		/* ASCII */
		if (domain == NULL) {
			SecurityBlob->DomainName.Buffer = 0;
			SecurityBlob->DomainName.Length = 0;
			SecurityBlob->DomainName.MaximumLength = 0;
		} else {
			__u16 len;
			negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
			strncpy(bcc_ptr, domain, 63);
			len = strnlen(domain, 64);
			SecurityBlob->DomainName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->DomainName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->DomainName.Length = cpu_to_le16(len);
		}
		if (user == NULL) {
			SecurityBlob->UserName.Buffer = 0;
			SecurityBlob->UserName.Length = 0;
			SecurityBlob->UserName.MaximumLength = 0;
		} else {
			__u16 len;
			strncpy(bcc_ptr, user, 63);
			len = strnlen(user, 64);
			SecurityBlob->UserName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->UserName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->UserName.Length = cpu_to_le16(len);
		}
		/* BB fill in our workstation name if known BB */

		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
		bcc_ptr++;	/* null domain */
		*bcc_ptr = 0;
	}
	SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
	pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);
	if (rc) {
/*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len =
		    le16_to_cpu(pSMBr->resp.SecurityBlobLength);
		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	/* BB do we want to set anything in SesInfo struct ? */
/*        if(SecurityBlob2->MessageType != NtLm??){                               
                 cFYI("Unexpected message type on auth response is %d ")); 
        } */
		if (ses) {
			cFYI(1,
			     ("Does UID on challenge %d match auth response UID %d ",
			      ses->Suid, smb_buffer_response->Uid));
			ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
			bcc_ptr = pByteArea(smb_buffer_response);	
            /* response can have either 3 or 4 word count - Samba sends 3 */
			if ((pSMBr->resp.hdr.WordCount == 3)
			    || ((pSMBr->resp.hdr.WordCount == 4)
				&& (blob_len <
				    pSMBr->resp.ByteCount))) {
				if (pSMBr->resp.hdr.WordCount == 4) {
					bcc_ptr +=
					    blob_len;
					cFYI(1,
					     ("Security Blob Length %d ",
					      blob_len));
				}

				cFYI(1,
				     ("NTLMSSP response to Authenticate "));

				if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
					if ((long) (bcc_ptr) % 2) {
						remaining_words =
						    (BCC(smb_buffer_response)
						     - 1) / 2;
						bcc_ptr++;	/* Unicode strings must be word aligned */
					} else {
						remaining_words = BCC(smb_buffer_response) / 2;
					}
					len =
					    UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
  the end since (at least) WIN2K and Windows XP have a major bug in not null
  terminating last Unicode string in response  */
					ses->serverOS =
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					    kzalloc(2 * (len + 1), GFP_KERNEL);
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					cifs_strfromUCS_le(ses->serverOS,
							   (wchar_t *)
							   bcc_ptr, len,
							   nls_codepage);
					bcc_ptr += 2 * (len + 1);
					remaining_words -= len + 1;
					ses->serverOS[2 * len] = 0;
					ses->serverOS[1 + (2 * len)] = 0;
					if (remaining_words > 0) {
						len = UniStrnlen((wchar_t *)
								 bcc_ptr,
								 remaining_words
								 - 1);
						ses->serverNOS =
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						    kzalloc(2 * (len + 1),
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							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
								   (wchar_t *)
								   bcc_ptr,
								   len,
								   nls_codepage);
						bcc_ptr += 2 * (len + 1);
						ses->serverNOS[2 * len] = 0;
						ses->serverNOS[1+(2*len)] = 0;
						remaining_words -= len + 1;
						if (remaining_words > 0) {
							len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);	
     /* last string not always null terminated (e.g. for Windows XP & 2000) */
							ses->serverDomain =
3125
							    kzalloc(2 *
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								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
							     (wchar_t *)
							     bcc_ptr, len,
							     nls_codepage);
							bcc_ptr +=
							    2 * (len + 1);
							ses->
							    serverDomain[2
									 * len]
							    = 0;
							ses->
							    serverDomain[1
									 +
									 (2
									  *
									  len)]
							    = 0;
						} /* else no more room so create dummy domain string */
						else
3150
							ses->serverDomain = kzalloc(2,GFP_KERNEL);
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					} else {  /* no room so create dummy domain and NOS string */
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						ses->serverDomain = kzalloc(2, GFP_KERNEL);
						ses->serverNOS = kzalloc(2, GFP_KERNEL);
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					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - 
                        (long) pByteArea(smb_buffer_response) 
                            <= BCC(smb_buffer_response)) {
3160
						ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
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						strncpy(ses->serverOS,bcc_ptr, len);

						bcc_ptr += len;
						bcc_ptr[0] = 0;	/* null terminate the string */
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
3168
						ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
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						strncpy(ses->serverNOS, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
3175
						ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
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						strncpy(ses->serverDomain, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;
					} else
						cFYI(1,
						     ("Variable field of length %d extends beyond end of smb ",
						      len));
				}
			} else {
				cERROR(1,
				       (" Security Blob Length extends beyond end of SMB"));
			}
		} else {
			cERROR(1, ("No session structure passed in."));
		}
	} else {
		cERROR(1,
		       (" Invalid Word count %d: ",
			smb_buffer_response->WordCount));
		rc = -EIO;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}

int
CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
	 const char *tree, struct cifsTconInfo *tcon,
	 const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	TCONX_REQ *pSMB;
	TCONX_RSP *pSMBr;
	unsigned char *bcc_ptr;
	int rc = 0;
	int length;
	__u16 count;

	if (ses == NULL)
		return -EIO;

	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;

	header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
			NULL /*no tid */ , 4 /*wct */ );
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	smb_buffer->Mid = GetNextMid(ses->server);
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	smb_buffer->Uid = ses->Suid;
	pSMB = (TCONX_REQ *) smb_buffer;
	pSMBr = (TCONX_RSP *) smb_buffer_response;

	pSMB->AndXCommand = 0xFF;
	pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
	pSMB->PasswordLength = cpu_to_le16(1);	/* minimum */
	bcc_ptr = &pSMB->Password[0];
	bcc_ptr++;		/* skip password */

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
	}
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		length =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, tree, 100, nls_codepage);
		bcc_ptr += 2 * length;	/* convert num of 16 bit words to bytes */
		bcc_ptr += 2;	/* skip trailing null */
	} else {		/* ASCII */

		strcpy(bcc_ptr, tree);
		bcc_ptr += strlen(tree) + 1;
	}
	strcpy(bcc_ptr, "?????");
	bcc_ptr += strlen("?????");
	bcc_ptr += 1;
	count = bcc_ptr - &pSMB->Password[0];
	pSMB->hdr.smb_buf_length += count;
	pSMB->ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);

	/* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
	/* above now done in SendReceive */
	if ((rc == 0) && (tcon != NULL)) {
		tcon->tidStatus = CifsGood;
		tcon->tid = smb_buffer_response->Tid;
		bcc_ptr = pByteArea(smb_buffer_response);
		length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
        /* skip service field (NB: this field is always ASCII) */
		bcc_ptr += length + 1;	
		strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
		if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
			length = UniStrnlen((wchar_t *) bcc_ptr, 512);
			if ((bcc_ptr + (2 * length)) -
			     pByteArea(smb_buffer_response) <=
			    BCC(smb_buffer_response)) {
				if(tcon->nativeFileSystem)
					kfree(tcon->nativeFileSystem);
				tcon->nativeFileSystem =
3289
				    kzalloc(length + 2, GFP_KERNEL);
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				cifs_strfromUCS_le(tcon->nativeFileSystem,
						   (wchar_t *) bcc_ptr,
						   length, nls_codepage);
				bcc_ptr += 2 * length;
				bcc_ptr[0] = 0;	/* null terminate the string */
				bcc_ptr[1] = 0;
				bcc_ptr += 2;
			}
			/* else do not bother copying these informational fields */
		} else {
			length = strnlen(bcc_ptr, 1024);
			if ((bcc_ptr + length) -
			    pByteArea(smb_buffer_response) <=
			    BCC(smb_buffer_response)) {
				if(tcon->nativeFileSystem)
					kfree(tcon->nativeFileSystem);
				tcon->nativeFileSystem =
3307
				    kzalloc(length + 1, GFP_KERNEL);
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				strncpy(tcon->nativeFileSystem, bcc_ptr,
					length);
			}
			/* else do not bother copying these informational fields */
		}
		tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
		cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
	} else if ((rc == 0) && tcon == NULL) {
        /* all we need to save for IPC$ connection */
		ses->ipc_tid = smb_buffer_response->Tid;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);
	return rc;
}

int
cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
{
	int rc = 0;
	int xid;
	struct cifsSesInfo *ses = NULL;
	struct task_struct *cifsd_task;

	xid = GetXid();

	if (cifs_sb->tcon) {
		ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
		rc = CIFSSMBTDis(xid, cifs_sb->tcon);
		if (rc == -EBUSY) {
			FreeXid(xid);
			return 0;
		}
		tconInfoFree(cifs_sb->tcon);
		if ((ses) && (ses->server)) {
			/* save off task so we do not refer to ses later */
			cifsd_task = ses->server->tsk;
			cFYI(1, ("About to do SMBLogoff "));
			rc = CIFSSMBLogoff(xid, ses);
			if (rc == -EBUSY) {
				FreeXid(xid);
				return 0;
			} else if (rc == -ESHUTDOWN) {
				cFYI(1,("Waking up socket by sending it signal"));
3353
				if(cifsd_task) {
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					send_sig(SIGKILL,cifsd_task,1);
3355 3356
					wait_for_completion(&cifsd_complete);
				}
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				rc = 0;
			} /* else - we have an smb session
				left on this socket do not kill cifsd */
		} else
			cFYI(1, ("No session or bad tcon"));
	}
	
	cifs_sb->tcon = NULL;
3365 3366
	if (ses)
		schedule_timeout_interruptible(msecs_to_jiffies(500));
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	if (ses)
		sesInfoFree(ses);

	FreeXid(xid);
	return rc;		/* BB check if we should always return zero here */
} 

int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
					   struct nls_table * nls_info)
{
	int rc = 0;
	char ntlm_session_key[CIFS_SESSION_KEY_SIZE];
	int ntlmv2_flag = FALSE;
3380
	int first_time = 0;
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	/* what if server changes its buffer size after dropping the session? */
	if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
		rc = CIFSSMBNegotiate(xid, pSesInfo);
		if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
			rc = CIFSSMBNegotiate(xid, pSesInfo);
			if(rc == -EAGAIN) 
				rc = -EHOSTDOWN;
		}
		if(rc == 0) {
			spin_lock(&GlobalMid_Lock);
			if(pSesInfo->server->tcpStatus != CifsExiting)
				pSesInfo->server->tcpStatus = CifsGood;
			else
				rc = -EHOSTDOWN;
			spin_unlock(&GlobalMid_Lock);

		}
3399
		first_time = 1;
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	}
	if (!rc) {
		pSesInfo->capabilities = pSesInfo->server->capabilities;
		if(linuxExtEnabled == 0)
			pSesInfo->capabilities &= (~CAP_UNIX);
3405
	/*	pSesInfo->sequence_number = 0;*/
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		cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
			pSesInfo->server->secMode,
			pSesInfo->server->capabilities,
			pSesInfo->server->timeZone));
		if (extended_security
				&& (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
				&& (pSesInfo->server->secType == NTLMSSP)) {
			cFYI(1, ("New style sesssetup "));
			rc = CIFSSpnegoSessSetup(xid, pSesInfo,
				NULL /* security blob */, 
				0 /* blob length */,
				nls_info);
		} else if (extended_security
			   && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
			   && (pSesInfo->server->secType == RawNTLMSSP)) {
			cFYI(1, ("NTLMSSP sesssetup "));
			rc = CIFSNTLMSSPNegotiateSessSetup(xid,
						pSesInfo,
						&ntlmv2_flag,
						nls_info);
			if (!rc) {
				if(ntlmv2_flag) {
					char * v2_response;
					cFYI(1,("Can use more secure NTLM version 2 password hash"));
					if(CalcNTLMv2_partial_mac_key(pSesInfo, 
						nls_info)) {
						rc = -ENOMEM;
						goto ss_err_exit;
					} else
						v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
					if(v2_response) {
						CalcNTLMv2_response(pSesInfo,v2_response);
3438 3439 3440 3441
				/*		if(first_time)
							cifs_calculate_ntlmv2_mac_key(
							  pSesInfo->server->mac_signing_key, 
							  response, ntlm_session_key, */
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						kfree(v2_response);
					/* BB Put dummy sig in SessSetup PDU? */
					} else {
						rc = -ENOMEM;
						goto ss_err_exit;
					}

				} else {
					SMBNTencrypt(pSesInfo->password,
						pSesInfo->server->cryptKey,
						ntlm_session_key);

3454 3455 3456 3457 3458
					if(first_time)
						cifs_calculate_mac_key(
							pSesInfo->server->mac_signing_key,
							ntlm_session_key,
							pSesInfo->password);
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				}
			/* for better security the weaker lanman hash not sent
			   in AuthSessSetup so we no longer calculate it */

				rc = CIFSNTLMSSPAuthSessSetup(xid,
					pSesInfo,
					ntlm_session_key,
					ntlmv2_flag,
					nls_info);
			}
		} else { /* old style NTLM 0.12 session setup */
			SMBNTencrypt(pSesInfo->password,
				pSesInfo->server->cryptKey,
				ntlm_session_key);

3474 3475 3476 3477 3478
			if(first_time) 		
				cifs_calculate_mac_key(
					pSesInfo->server->mac_signing_key,
					ntlm_session_key, pSesInfo->password);

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			rc = CIFSSessSetup(xid, pSesInfo,
				ntlm_session_key, nls_info);
		}
		if (rc) {
			cERROR(1,("Send error in SessSetup = %d",rc));
		} else {
			cFYI(1,("CIFS Session Established successfully"));
			pSesInfo->status = CifsGood;
		}
	}
ss_err_exit:
	return rc;
}