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/*
Unix SMB/Netbios implementation.
Version 1.9.
name query routines
Copyright (C) Andrew Tridgell 1994-1997
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
extern pstring scope;
extern int DEBUGLEVEL;
/****************************************************************************
interpret a node status response
****************************************************************************/
static void _interpret_node_status(char *p, char *master,char *rname)
{
int numnames = CVAL(p,0);
DEBUG(1,("received %d names\n",numnames));
if (rname) *rname = 0;
if (master) *master = 0;
p += 1;
while (numnames--)
{
char qname[17];
int type;
fstring flags;
int i;
*flags = 0;
StrnCpy(qname,p,15);
type = CVAL(p,15);
p += 16;
strcat(flags, (p[0] & 0x80) ? "<GROUP> " : " ");
if ((p[0] & 0x60) == 0x00) strcat(flags,"B ");
if ((p[0] & 0x60) == 0x20) strcat(flags,"P ");
if ((p[0] & 0x60) == 0x40) strcat(flags,"M ");
if ((p[0] & 0x60) == 0x60) strcat(flags,"H ");
if (p[0] & 0x10) strcat(flags,"<DEREGISTERING> ");
if (p[0] & 0x08) strcat(flags,"<CONFLICT> ");
if (p[0] & 0x04) strcat(flags,"<ACTIVE> ");
if (p[0] & 0x02) strcat(flags,"<PERMANENT> ");
if (master && !*master && type == 0x1d) {
StrnCpy(master,qname,15);
trim_string(master,NULL," ");
}
if (rname && !*rname && type == 0x20 && !(p[0]&0x80)) {
StrnCpy(rname,qname,15);
trim_string(rname,NULL," ");
}
for (i = strlen( qname) ; --i >= 0 ; ) {
if (!isprint(qname[i])) qname[i] = '.';
}
DEBUG(1,("\t%-15s <%02x> - %s\n",qname,type,flags));
p+=2;
}
DEBUG(1,("num_good_sends=%d num_good_receives=%d\n",
IVAL(p,20),IVAL(p,24)));
}
/****************************************************************************
do a netbios name status query on a host
the "master" parameter is a hack used for finding workgroups.
**************************************************************************/
BOOL name_status(int fd,char *name,int name_type,BOOL recurse,
struct in_addr to_ip,char *master,char *rname,
void (*fn)())
{
BOOL found=False;
int retries = 2;
int retry_time = 5000;
struct timeval tval;
struct packet_struct p;
struct packet_struct *p2;
struct nmb_packet *nmb = &p.packet.nmb;
static int name_trn_id = 0;
bzero((char *)&p,sizeof(p));
if (!name_trn_id) name_trn_id = (time(NULL)%(unsigned)0x7FFF) +
(getpid()%(unsigned)100);
name_trn_id = (name_trn_id+1) % (unsigned)0x7FFF;
nmb->header.name_trn_id = name_trn_id;
nmb->header.opcode = 0;
nmb->header.response = False;
nmb->header.nm_flags.bcast = False;
nmb->header.nm_flags.recursion_available = False;
nmb->header.nm_flags.recursion_desired = False;
nmb->header.nm_flags.trunc = False;
nmb->header.nm_flags.authoritative = False;
nmb->header.rcode = 0;
nmb->header.qdcount = 1;
nmb->header.ancount = 0;
nmb->header.nscount = 0;
nmb->header.arcount = 0;
make_nmb_name(&nmb->question.question_name,name,name_type,scope);
nmb->question.question_type = 0x21;
nmb->question.question_class = 0x1;
p.ip = to_ip;
p.port = NMB_PORT;
p.fd = fd;
p.timestamp = time(NULL);
p.packet_type = NMB_PACKET;
GetTimeOfDay(&tval);
if (!send_packet(&p))
return(False);
retries--;
while (1)
{
struct timeval tval2;
GetTimeOfDay(&tval2);
if (TvalDiff(&tval,&tval2) > retry_time) {
if (!retries) break;
if (!found && !send_packet(&p))
return False;
GetTimeOfDay(&tval);
retries--;
}
if ((p2=receive_packet(fd,NMB_PACKET,90)))
{
struct nmb_packet *nmb2 = &p2->packet.nmb;
debug_nmb_packet(p2);
if (nmb->header.name_trn_id != nmb2->header.name_trn_id ||
!nmb2->header.response) {
/* its not for us - maybe deal with it later */
if (fn)
fn(p2);
else
free_packet(p2);
continue;
}
if (nmb2->header.opcode != 0 ||
nmb2->header.nm_flags.bcast ||
nmb2->header.rcode ||
!nmb2->header.ancount ||
nmb2->answers->rr_type != 0x21) {
/* XXXX what do we do with this? could be a redirect, but
we'll discard it for the moment */
free_packet(p2);
continue;
}
_interpret_node_status(&nmb2->answers->rdata[0], master,rname);
free_packet(p2);
return(True);
}
}
DEBUG(0,("No status response (this is not unusual)\n"));
return(False);
}
/****************************************************************************
do a netbios name query to find someones IP
****************************************************************************/
BOOL name_query(int fd,char *name,int name_type,
BOOL bcast,BOOL recurse,
struct in_addr to_ip, struct in_addr *ip,void (*fn)())
{
BOOL found=False;
int retries = 3;
int retry_time = bcast?250:2000;
struct timeval tval;
struct packet_struct p;
struct packet_struct *p2;
struct nmb_packet *nmb = &p.packet.nmb;
static int name_trn_id = 0;
bzero((char *)&p,sizeof(p));
if (!name_trn_id) name_trn_id = (time(NULL)%(unsigned)0x7FFF) +
(getpid()%(unsigned)100);
name_trn_id = (name_trn_id+1) % (unsigned)0x7FFF;
nmb->header.name_trn_id = name_trn_id;
nmb->header.opcode = 0;
nmb->header.response = False;
nmb->header.nm_flags.bcast = bcast;
nmb->header.nm_flags.recursion_available = False;
nmb->header.nm_flags.recursion_desired = True;
nmb->header.nm_flags.trunc = False;
nmb->header.nm_flags.authoritative = False;
nmb->header.rcode = 0;
nmb->header.qdcount = 1;
nmb->header.ancount = 0;
nmb->header.nscount = 0;
nmb->header.arcount = 0;
make_nmb_name(&nmb->question.question_name,name,name_type,scope);
nmb->question.question_type = 0x20;
nmb->question.question_class = 0x1;
p.ip = to_ip;
p.port = NMB_PORT;
p.fd = fd;
p.timestamp = time(NULL);
p.packet_type = NMB_PACKET;
GetTimeOfDay(&tval);
if (!send_packet(&p))
return(False);
retries--;
while (1)
{
struct timeval tval2;
GetTimeOfDay(&tval2);
if (TvalDiff(&tval,&tval2) > retry_time) {
if (!retries) break;
if (!found && !send_packet(&p))
return False;
GetTimeOfDay(&tval);
retries--;
}
if ((p2=receive_packet(fd,NMB_PACKET,90)))
{
struct nmb_packet *nmb2 = &p2->packet.nmb;
debug_nmb_packet(p2);
if (nmb->header.name_trn_id != nmb2->header.name_trn_id ||
!nmb2->header.response) {
/* its not for us - maybe deal with it later
(put it on the queue?) */
if (fn)
fn(p2);
else
free_packet(p2);
continue;
}
if (nmb2->header.opcode != 0 ||
nmb2->header.nm_flags.bcast ||
nmb2->header.rcode ||
!nmb2->header.ancount) {
/* XXXX what do we do with this? could be a redirect, but
we'll discard it for the moment */
free_packet(p2);
continue;
}
if (ip) {
putip((char *)ip,&nmb2->answers->rdata[2]);
DEBUG(fn?3:2,("Got a positive name query response from %s",
inet_ntoa(p2->ip)));
DEBUG(fn?3:2,(" (%s)\n",inet_ntoa(*ip)));
}
found=True; retries=0;
free_packet(p2);
if (fn) break;
}
}
return(found);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.