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samba-mirror/source/utils/nmblookup.c
Andrew Tridgell e125f06058 This commit finally gives us multiple wins server groups. We now
accept an extended syntax for 'wins server' like this:

  wins server = group1:192.168.2.10 group2:192.168.3.99 group1:192.168.0.1

The tags before the IPs don't mean anything, they are just a way of
grouping IPs together. If you use the old syntax (ie. no ':') then
an implicit group name of '*' is used. In general I'd recommend people
use interface names for the group names, but it doesn't matter much.

When we register in nmbd we try to register all our IPs with each group
of WINS servers. We keep trying until all of them are registered with
every group, falling back to the failover WINS servers for each group
as we go.

When we do a WINS lookup we try each of the WINS servers for each group.
If a WINS server for a group gives a negative answer then we give up
on that group and move to the next group. If it times out then
we move to the next failover wins server in the group.

In either case, if a WINS server doesn't respond then we mark it dead
for 10 minutes, to prevent lengthy waits for dead servers.
0001-01-01 00:00:00 +00:00

345 lines
9.5 KiB
C

/*
Unix SMB/CIFS implementation.
NBT client - used to lookup netbios names
Copyright (C) Andrew Tridgell 1994-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define NO_SYSLOG
#include "includes.h"
extern BOOL AllowDebugChange;
static BOOL give_flags = False;
static BOOL use_bcast = True;
static BOOL got_bcast = False;
static struct in_addr bcast_addr;
static BOOL recursion_desired = False;
static BOOL translate_addresses = False;
static int ServerFD= -1;
static int RootPort = False;
static BOOL find_status=False;
/****************************************************************************
open the socket communication
**************************************************************************/
static BOOL open_sockets(void)
{
ServerFD = open_socket_in( SOCK_DGRAM,
(RootPort ? 137 : 0),
(RootPort ? 0 : 3),
interpret_addr(lp_socket_address()), True );
if (ServerFD == -1)
return(False);
set_socket_options( ServerFD, "SO_BROADCAST" );
DEBUG(3, ("Socket opened.\n"));
return True;
}
/****************************************************************************
usage on the program
****************************************************************************/
static void usage(void)
{
d_printf("Usage: nmblookup [-M] [-B bcast address] [-d debuglevel] name\n");
d_printf("Version %s\n",VERSION);
d_printf("\t-d debuglevel set the debuglevel\n");
d_printf("\t-B broadcast address the address to use for broadcasts\n");
d_printf("\t-f list the NMB flags returned\n");
d_printf("\t-U unicast address the address to use for unicast\n");
d_printf("\t-M searches for a master browser\n");
d_printf("\t-R set recursion desired in packet\n");
d_printf("\t-S lookup node status as well\n");
d_printf("\t-T translate IP addresses into names\n");
d_printf("\t-r Use root port 137 (Win95 only replies to this)\n");
d_printf("\t-A Do a node status on <name> as an IP Address\n");
d_printf("\t-i NetBIOS scope Use the given NetBIOS scope for name queries\n");
d_printf("\t-s smb.conf file Use the given path to the smb.conf file\n");
d_printf("\t-h Print this help message.\n");
d_printf("\n If you specify -M and name is \"-\", nmblookup looks up __MSBROWSE__<01>\n");
d_printf("\n");
}
/****************************************************************************
turn a node status flags field into a string
****************************************************************************/
static char *node_status_flags(unsigned char flags)
{
static fstring ret;
fstrcpy(ret,"");
fstrcat(ret, (flags & 0x80) ? "<GROUP> " : " ");
if ((flags & 0x60) == 0x00) fstrcat(ret,"B ");
if ((flags & 0x60) == 0x20) fstrcat(ret,"P ");
if ((flags & 0x60) == 0x40) fstrcat(ret,"M ");
if ((flags & 0x60) == 0x60) fstrcat(ret,"H ");
if (flags & 0x10) fstrcat(ret,"<DEREGISTERING> ");
if (flags & 0x08) fstrcat(ret,"<CONFLICT> ");
if (flags & 0x04) fstrcat(ret,"<ACTIVE> ");
if (flags & 0x02) fstrcat(ret,"<PERMANENT> ");
return ret;
}
/****************************************************************************
turn the NMB Query flags into a string
****************************************************************************/
static char *query_flags(int flags)
{
static fstring ret1;
fstrcpy(ret1, "");
if (flags & NM_FLAGS_RS) fstrcat(ret1, "Response ");
if (flags & NM_FLAGS_AA) fstrcat(ret1, "Authoritative ");
if (flags & NM_FLAGS_TC) fstrcat(ret1, "Truncated ");
if (flags & NM_FLAGS_RD) fstrcat(ret1, "Recursion_Desired ");
if (flags & NM_FLAGS_RA) fstrcat(ret1, "Recursion_Available ");
if (flags & NM_FLAGS_B) fstrcat(ret1, "Broadcast ");
return ret1;
}
/****************************************************************************
do a node status query
****************************************************************************/
static void do_node_status(int fd, char *name, int type, struct in_addr ip)
{
struct nmb_name nname;
int count, i, j;
struct node_status *status;
fstring cleanname;
d_printf("Looking up status of %s\n",inet_ntoa(ip));
make_nmb_name(&nname, name, type);
status = node_status_query(fd,&nname,ip, &count);
if (status) {
for (i=0;i<count;i++) {
fstrcpy(cleanname, status[i].name);
for (j=0;cleanname[j];j++) {
if (!isprint((int)cleanname[j])) cleanname[j] = '.';
}
d_printf("\t%-15s <%02x> - %s\n",
cleanname,status[i].type,
node_status_flags(status[i].flags));
}
SAFE_FREE(status);
}
d_printf("\n");
}
/****************************************************************************
send out one query
****************************************************************************/
static BOOL query_one(char *lookup, unsigned int lookup_type)
{
int j, count, flags = 0;
struct in_addr *ip_list=NULL;
if (got_bcast) {
d_printf("querying %s on %s\n", lookup, inet_ntoa(bcast_addr));
ip_list = name_query(ServerFD,lookup,lookup_type,use_bcast,
use_bcast?True:recursion_desired,
bcast_addr,&count, &flags, NULL);
} else {
struct in_addr *bcast;
for (j=iface_count() - 1;
!ip_list && j >= 0;
j--) {
bcast = iface_n_bcast(j);
d_printf("querying %s on %s\n",
lookup, inet_ntoa(*bcast));
ip_list = name_query(ServerFD,lookup,lookup_type,
use_bcast,
use_bcast?True:recursion_desired,
*bcast,&count, &flags, NULL);
}
}
if (!ip_list) return False;
if (give_flags)
d_printf("Flags: %s\n", query_flags(flags));
for (j=0;j<count;j++) {
if (translate_addresses) {
struct hostent *host = gethostbyaddr((char *)&ip_list[j], sizeof(ip_list[j]), AF_INET);
if (host) {
d_printf("%s, ", host -> h_name);
}
}
d_printf("%s %s<%02x>\n",inet_ntoa(ip_list[j]),lookup, lookup_type);
}
/* We can only do find_status if the ip address returned
was valid - ie. name_query returned true.
*/
if (find_status) {
do_node_status(ServerFD, lookup, lookup_type, ip_list[0]);
}
safe_free(ip_list);
return (ip_list != NULL);
}
/****************************************************************************
main program
****************************************************************************/
int main(int argc,char *argv[])
{
int opt;
unsigned int lookup_type = 0x0;
pstring lookup;
extern int optind;
extern char *optarg;
BOOL find_master=False;
int i;
BOOL lookup_by_ip = False;
int commandline_debuglevel = -2;
DEBUGLEVEL = 1;
/* Prevent smb.conf setting from overridding */
AllowDebugChange = False;
*lookup = 0;
setup_logging(argv[0],True);
while ((opt = getopt(argc, argv, "d:fB:U:i:s:SMrhART")) != EOF)
switch (opt)
{
case 'B':
bcast_addr = *interpret_addr2(optarg);
got_bcast = True;
use_bcast = True;
break;
case 'f':
give_flags = True;
break;
case 'U':
bcast_addr = *interpret_addr2(optarg);
got_bcast = True;
use_bcast = False;
break;
case 'T':
translate_addresses = !translate_addresses;
break;
case 'i':
{
extern pstring global_scope;
pstrcpy(global_scope,optarg);
strupper(global_scope);
}
break;
case 'M':
find_master = True;
break;
case 'S':
find_status = True;
break;
case 'R':
recursion_desired = True;
break;
case 'd':
commandline_debuglevel = DEBUGLEVEL = atoi(optarg);
break;
case 's':
pstrcpy(dyn_CONFIGFILE, optarg);
break;
case 'r':
RootPort = True;
break;
case 'h':
usage();
exit(0);
break;
case 'A':
lookup_by_ip = True;
break;
default:
usage();
exit(1);
}
if (argc < 2) {
usage();
exit(1);
}
if (!lp_load(dyn_CONFIGFILE,True,False,False)) {
fprintf(stderr, "Can't load %s - run testparm to debug it\n", dyn_CONFIGFILE);
}
/*
* Ensure we reset DEBUGLEVEL if someone specified it
* on the command line.
*/
if(commandline_debuglevel != -2)
DEBUGLEVEL = commandline_debuglevel;
load_interfaces();
if (!open_sockets()) return(1);
for (i=optind;i<argc;i++)
{
char *p;
struct in_addr ip;
fstrcpy(lookup,argv[i]);
if(lookup_by_ip)
{
fstrcpy(lookup,"*");
ip = *interpret_addr2(argv[i]);
do_node_status(ServerFD, lookup, lookup_type, ip);
continue;
}
if (find_master) {
if (*lookup == '-') {
fstrcpy(lookup,"\01\02__MSBROWSE__\02");
lookup_type = 1;
} else {
lookup_type = 0x1d;
}
}
p = strchr_m(lookup,'#');
if (p) {
*p = '\0';
sscanf(++p,"%x",&lookup_type);
}
if (!query_one(lookup, lookup_type)) {
d_printf( "name_query failed to find name %s", lookup );
if( 0 != lookup_type )
d_printf( "#%02x", lookup_type );
d_printf( "\n" );
}
}
return(0);
}