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/*
Unix SMB/Netbios implementation.
Version 1.9.
NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Luke Kenneth Casson Leighton 1994-1998
Copyright (C) Jeremy Allison 1994-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Revision History:
*/
#include "includes.h"
extern int DEBUGLEVEL;
extern pstring myname;
extern fstring myworkgroup;
/****************************************************************************
Process a domain logon packet
**************************************************************************/
void process_logon_packet(struct packet_struct *p,char *buf,int len,
char *mailslot)
{
struct dgram_packet *dgram = &p->packet.dgram;
pstring my_name;
fstring reply_name;
BOOL add_slashes = False;
pstring outbuf;
int code,reply_code;
char unknown_byte = 0;
uint16 request_count = 0;
uint16 token = 0;
uint32 ntversion;
uint16 lmnttoken;
uint16 lm20token;
uint32 allowableaccount; /* Control bits, i.e. 0x80 == workstation trust a/c. */
uint32 domainsidsize;
uint16 requestcount;
char *domainsid;
char *getdc;
char *uniuser; /* Unicode user name. */
pstring ascuser;
char *unicomp; /* Unicode computer name. */
struct smb_passwd *smb_pass; /* To check if machine account exists */
if (!lp_domain_logons())
{
DEBUG(3,("process_logon_packet: Logon packet received from IP %s and domain \
logons are not enabled.\n", inet_ntoa(p->ip) ));
return;
}
strcpy(my_name, myname);
strupper(my_name);
code = SVAL(buf,0);
DEBUG(1,("process_logon_packet: Logon from %s: code = %x\n", inet_ntoa(p->ip), code));
switch (code)
{
case 0:
{
char *q = buf + 2;
char *machine = q;
char *user = skip_string(machine,1);
getdc = skip_string(user,1);
q = skip_string(getdc,1);
unknown_byte = CVAL(q,0);
request_count = SVAL(q,1);
token = SVAL(q,3);
reply_code = 0x6;
strcpy(reply_name,my_name);
add_slashes = True;
DEBUG(3,("process_logon_packet: Domain login request from %s at IP %s user=%s token=%x\n",
machine,inet_ntoa(p->ip),user,token));
q = outbuf;
SSVAL(q, 0, 6); q += 2;
strcpy(reply_name, "\\\\");
strcat(reply_name, my_name);
strcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
SSVAL(q, 0, token); q += 2;
dump_data(4, outbuf, PTR_DIFF(q, outbuf));
send_mailslot(True, getdc,
outbuf,PTR_DIFF(q,outbuf),
dgram->dest_name.name,
dgram->dest_name.name_type,
dgram->source_name.name,
dgram->source_name.name_type,
p->ip, *iface_ip(p->ip));
break;
}
case QUERYFORPDC:
{
char *q = buf + 2;
char *machine = q;
getdc = skip_string(machine,1);
unicomp = skip_string(getdc,1);
q = align2(unicomp, buf);
q = skip_unicode_string(q, 1);
ntversion = IVAL(q, 0); q += 4;
lmnttoken = SVAL(q, 0); q += 2;
lm20token = SVAL(q, 0); q += 2;
/* Construct reply. */
q = outbuf;
SSVAL(q, 0, QUERYFORPDC_R); q += 2;
strcpy(reply_name,my_name);
strcpy(q, reply_name); q = skip_string(q, 1); /* PDC name */
if (strcmp(mailslot, NT_LOGON_MAILSLOT)==0) {
q = align2(q, buf);
PutUniCode(q, my_name); /* PDC name */
q = skip_unicode_string(q, 1);
PutUniCode(q, myworkgroup); /* Domain name*/
q = skip_unicode_string(q, 1);
SIVAL(q, 0, ntversion); q += 4;
SSVAL(q, 0, lmnttoken); q += 2;
SSVAL(q, 0, lm20token); q += 2;
}
DEBUG(3,("process_logon_packet: GETDC request from %s at IP %s, \
reporting %s domain %s 0x%x ntversion=%x lm_nt token=%x lm_20 token=%x\n",
machine,inet_ntoa(p->ip), reply_name, lp_workgroup(),
QUERYFORPDC_R, (uint32)ntversion, (uint32)lmnttoken,
(uint32)lm20token ));
dump_data(4, outbuf, PTR_DIFF(q, outbuf));
send_mailslot(True, getdc,
outbuf,PTR_DIFF(q,outbuf),
dgram->dest_name.name,
dgram->dest_name.name_type,
dgram->source_name.name,
dgram->source_name.name_type,
p->ip, *iface_ip(p->ip));
return;
}
case SAMLOGON:
{
char *q = buf + 2;
requestcount = SVAL(q, 0); q += 2;
unicomp = q;
uniuser = skip_unicode_string(unicomp,1);
getdc = skip_unicode_string(uniuser,1);
q = skip_string(getdc,1);
allowableaccount = IVAL(q, 0); q += 4;
domainsidsize = IVAL(q, 0); q += 4;
domainsid = q;
q += domainsidsize + 3;
ntversion = IVAL(q, 0); q += 4;
lmnttoken = SVAL(q, 0); q += 2;
lm20token = SVAL(q, 0); q += 2;
DEBUG(3,("process_logon_packet: SAMLOGON sidsize %d ntv %d\n", domainsidsize, ntversion));
/*
* If MACHINE$ is in our password database then respond, else ignore.
* Let's ignore the SID.
*/
pstrcpy(ascuser, unistr(uniuser));
DEBUG(3,("process_logon_packet: SAMLOGON user %s\n", ascuser));
strcpy(reply_name,"\\\\"); /* Here it wants \\LOGONSERVER. */
strcpy(reply_name+2,my_name);
smb_pass = getsmbpwnam(ascuser);
if(!smb_pass )
{
DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, not in password file\n",
unistr(unicomp),inet_ntoa(p->ip), ascuser));
return;
}
else if(smb_pass->acct_ctrl & ACB_DISABLED)
{
DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, accound disabled.\n",
unistr(unicomp),inet_ntoa(p->ip), ascuser));
return;
}
else
{
DEBUG(3,("process_logon_packet: SAMLOGON request from %s(%s) for %s, returning logon svr %s domain %s code %x token=%x\n",
unistr(unicomp),inet_ntoa(p->ip), ascuser, reply_name, myworkgroup,
SAMLOGON_R ,lmnttoken));
}
/* Construct reply. */
q = outbuf;
SSVAL(q, 0, SAMLOGON_R); q += 2;
PutUniCode(q, reply_name); q = skip_unicode_string(q, 1);
unistrcpy(q, uniuser); q = skip_unicode_string(q, 1); /* User name (workstation trust account) */
PutUniCode(q, lp_workgroup()); q = skip_unicode_string(q, 1); /* Domain name. */
SIVAL(q, 0, ntversion); q += 4;
SSVAL(q, 0, lmnttoken); q += 2;
SSVAL(q, 0, lm20token); q += 2;
dump_data(4, outbuf, PTR_DIFF(q, outbuf));
send_mailslot(True, getdc,
outbuf,PTR_DIFF(q,outbuf),
dgram->dest_name.name,
dgram->dest_name.name_type,
dgram->source_name.name,
dgram->source_name.name_type,
p->ip, *iface_ip(p->ip));
break;
}
default:
{
DEBUG(3,("process_logon_packet: Unknown domain request %d\n",code));
return;
}
}
}
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