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Unix SMB/CIFS implementation.
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NBT netbios routines and daemon - version 2
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Copyright (C) Andrew Tridgell 1994-1998
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Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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Copyright (C) Jeremy Allison 1994-2003
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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uint16 samba_nb_type = 0; /* samba's NetBIOS name type */
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/**************************************************************************
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Set Samba's NetBIOS name type.
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***************************************************************************/
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void set_samba_nb_type(void)
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if( lp_wins_support() || wins_srv_count() ) {
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samba_nb_type = NB_HFLAG; /* samba is a 'hybrid' node type. */
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samba_nb_type = NB_BFLAG; /* samba is broadcast-only node type. */
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/***************************************************************************
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Convert a NetBIOS name to upper case.
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***************************************************************************/
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static void upcase_name( struct nmb_name *target, const struct nmb_name *source )
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if( NULL != source ) {
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memcpy( target, source, sizeof( struct nmb_name ) );
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pull_ascii_nstring(targ, sizeof(targ), target->name);
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push_ascii_nstring( target->name, targ);
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pull_ascii(scope, target->scope, 64, -1, STR_TERMINATE);
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push_ascii(target->scope, scope, 64, STR_TERMINATE);
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/* fudge... We're using a byte-by-byte compare, so we must be sure that
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* unused space doesn't have garbage in it.
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for( i = strlen( target->name ); i < sizeof( target->name ); i++ ) {
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target->name[i] = '\0';
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for( i = strlen( target->scope ); i < sizeof( target->scope ); i++ ) {
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target->scope[i] = '\0';
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/**************************************************************************
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Remove a name from the namelist.
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***************************************************************************/
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void remove_name_from_namelist(struct subnet_record *subrec,
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struct name_record *namerec )
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if (subrec == wins_server_subnet)
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remove_name_from_wins_namelist(namerec);
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subrec->namelist_changed = True;
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DLIST_REMOVE(subrec->namelist, namerec);
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SAFE_FREE(namerec->data.ip);
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ZERO_STRUCTP(namerec);
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/**************************************************************************
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Find a name in a subnet.
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**************************************************************************/
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struct name_record *find_name_on_subnet(struct subnet_record *subrec,
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const struct nmb_name *nmbname,
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struct nmb_name uc_name;
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struct name_record *name_ret;
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upcase_name( &uc_name, nmbname );
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if (subrec == wins_server_subnet) {
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return find_name_on_wins_subnet(&uc_name, self_only);
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for( name_ret = subrec->namelist; name_ret; name_ret = name_ret->next) {
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if (memcmp(&uc_name, &name_ret->name, sizeof(struct nmb_name)) == 0) {
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/* Self names only - these include permanent names. */
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if( self_only && (name_ret->data.source != SELF_NAME) && (name_ret->data.source != PERMANENT_NAME) ) {
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DEBUG( 9, ( "find_name_on_subnet: on subnet %s - self name %s NOT FOUND\n",
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subrec->subnet_name, nmb_namestr(nmbname) ) );
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DEBUG( 9, ("find_name_on_subnet: on subnet %s - found name %s source=%d\n",
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subrec->subnet_name, nmb_namestr(nmbname), name_ret->data.source) );
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DEBUG( 9, ( "find_name_on_subnet: on subnet %s - name %s NOT FOUND\n",
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subrec->subnet_name, nmb_namestr(nmbname) ) );
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/**************************************************************************
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Find a name over all known broadcast subnets.
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************************************************************************/
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struct name_record *find_name_for_remote_broadcast_subnet(struct nmb_name *nmbname,
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struct subnet_record *subrec;
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struct name_record *namerec;
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for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec) ) {
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namerec = find_name_on_subnet(subrec, nmbname, self_only);
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/**************************************************************************
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Update the ttl of an entry in a subnet name list.
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***************************************************************************/
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void update_name_ttl( struct name_record *namerec, int ttl )
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time_t time_now = time(NULL);
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if( namerec->data.death_time != PERMANENT_TTL) {
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namerec->data.death_time = time_now + ttl;
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namerec->data.refresh_time = time_now + MIN((ttl/2), MAX_REFRESH_TIME);
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if (namerec->subnet == wins_server_subnet) {
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wins_store_changed_namerec(namerec);
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namerec->subnet->namelist_changed = True;
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/**************************************************************************
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Add an entry to a subnet name list.
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***********************************************************************/
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BOOL add_name_to_subnet( struct subnet_record *subrec,
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enum name_source source,
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struct in_addr *iplist)
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struct name_record *namerec;
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time_t time_now = time(NULL);
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namerec = SMB_MALLOC_P(struct name_record);
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if( NULL == namerec ) {
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DEBUG( 0, ( "add_name_to_subnet: malloc fail.\n" ) );
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memset( (char *)namerec, '\0', sizeof(*namerec) );
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namerec->data.ip = SMB_MALLOC_ARRAY( struct in_addr, num_ips );
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if( NULL == namerec->data.ip ) {
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DEBUG( 0, ( "add_name_to_subnet: malloc fail when creating ip_flgs.\n" ) );
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ZERO_STRUCTP(namerec);
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namerec->subnet = subrec;
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make_nmb_name(&namerec->name, name, type);
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upcase_name(&namerec->name, NULL );
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/* Enter the name as active. */
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namerec->data.nb_flags = nb_flags | NB_ACTIVE;
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namerec->data.wins_flags = WINS_ACTIVE;
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/* If it's our primary name, flag it as so. */
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if (strequal( my_netbios_names(0), name )) {
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namerec->data.nb_flags |= NB_PERM;
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namerec->data.num_ips = num_ips;
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memcpy( (namerec->data.ip), iplist, num_ips * sizeof(struct in_addr) );
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namerec->data.source = source;
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/* Setup the death_time and refresh_time. */
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if (ttl == PERMANENT_TTL) {
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namerec->data.death_time = PERMANENT_TTL;
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namerec->data.death_time = time_now + ttl;
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namerec->data.refresh_time = time_now + MIN((ttl/2), MAX_REFRESH_TIME);
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DEBUG( 3, ( "add_name_to_subnet: Added netbios name %s with first IP %s \
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ttl=%d nb_flags=%2x to subnet %s\n",
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nmb_namestr( &namerec->name ),
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inet_ntoa( *iplist ),
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(unsigned int)nb_flags,
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subrec->subnet_name ) );
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/* Now add the record to the name list. */
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if (subrec == wins_server_subnet) {
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ret = add_name_to_wins_subnet(namerec);
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/* Free namerec - it's stored in the tdb. */
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SAFE_FREE(namerec->data.ip);
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DLIST_ADD(subrec->namelist, namerec);
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subrec->namelist_changed = True;
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/*******************************************************************
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Utility function automatically called when a name refresh or register
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succeeds. By definition this is a SELF_NAME (or we wouldn't be registering
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******************************************************************/
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void standard_success_register(struct subnet_record *subrec,
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struct userdata_struct *userdata,
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struct nmb_name *nmbname, uint16 nb_flags, int ttl,
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struct in_addr registered_ip)
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struct name_record *namerec;
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namerec = find_name_on_subnet( subrec, nmbname, FIND_SELF_NAME);
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if (namerec == NULL) {
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pull_ascii_nstring(name, sizeof(name), nmbname->name);
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add_name_to_subnet( subrec, name, nmbname->name_type,
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nb_flags, ttl, SELF_NAME, 1, ®istered_ip );
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update_name_ttl( namerec, ttl );
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/*******************************************************************
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Utility function automatically called when a name refresh or register
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fails. Note that this is only ever called on a broadcast subnet with
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one IP address per name. This is why it can just delete the name
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without enumerating the IP adresses. JRA.
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******************************************************************/
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void standard_fail_register( struct subnet_record *subrec,
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struct response_record *rrec,
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struct nmb_name *nmbname )
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struct name_record *namerec;
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namerec = find_name_on_subnet( subrec, nmbname, FIND_SELF_NAME);
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DEBUG( 0, ( "standard_fail_register: Failed to register/refresh name %s \
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on subnet %s\n", nmb_namestr(nmbname), subrec->subnet_name) );
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/* Remove the name from the subnet. */
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remove_name_from_namelist(subrec, namerec);
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/*******************************************************************
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Utility function to remove an IP address from a name record.
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******************************************************************/
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static void remove_nth_ip_in_record( struct name_record *namerec, int ind)
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if( ind != namerec->data.num_ips ) {
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memmove( (char *)(&namerec->data.ip[ind]),
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(char *)(&namerec->data.ip[ind+1]),
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( namerec->data.num_ips - ind - 1) * sizeof(struct in_addr) );
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namerec->data.num_ips--;
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if (namerec->subnet == wins_server_subnet) {
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wins_store_changed_namerec(namerec);
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namerec->subnet->namelist_changed = True;
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/*******************************************************************
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Utility function to check if an IP address exists in a name record.
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******************************************************************/
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BOOL find_ip_in_name_record( struct name_record *namerec, struct in_addr ip )
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for(i = 0; i < namerec->data.num_ips; i++) {
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if(ip_equal( namerec->data.ip[i], ip)) {
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/*******************************************************************
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Utility function to add an IP address to a name record.
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******************************************************************/
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void add_ip_to_name_record( struct name_record *namerec, struct in_addr new_ip )
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struct in_addr *new_list;
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/* Don't add one we already have. */
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if( find_ip_in_name_record( namerec, new_ip )) {
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new_list = SMB_MALLOC_ARRAY( struct in_addr, namerec->data.num_ips + 1);
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if( NULL == new_list ) {
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DEBUG(0,("add_ip_to_name_record: Malloc fail !\n"));
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memcpy( (char *)new_list, (char *)namerec->data.ip, namerec->data.num_ips * sizeof(struct in_addr) );
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new_list[namerec->data.num_ips] = new_ip;
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SAFE_FREE(namerec->data.ip);
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namerec->data.ip = new_list;
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namerec->data.num_ips += 1;
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if (namerec->subnet == wins_server_subnet) {
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wins_store_changed_namerec(namerec);
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namerec->subnet->namelist_changed = True;
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/*******************************************************************
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Utility function to remove an IP address from a name record.
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******************************************************************/
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void remove_ip_from_name_record( struct name_record *namerec,
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struct in_addr remove_ip )
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/* Try and find the requested ip address - remove it. */
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int orig_num = namerec->data.num_ips;
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for(i = 0; i < orig_num; i++) {
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if( ip_equal( remove_ip, namerec->data.ip[i]) ) {
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remove_nth_ip_in_record( namerec, i);
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/*******************************************************************
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Utility function that release_name callers can plug into as the
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success function when a name release is successful. Used to save
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duplication of success_function code.
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******************************************************************/
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void standard_success_release( struct subnet_record *subrec,
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struct userdata_struct *userdata,
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struct nmb_name *nmbname,
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struct in_addr released_ip )
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struct name_record *namerec;
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namerec = find_name_on_subnet( subrec, nmbname, FIND_ANY_NAME );
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if( namerec == NULL ) {
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DEBUG( 0, ( "standard_success_release: Name release for name %s IP %s \
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on subnet %s. Name was not found on subnet.\n", nmb_namestr(nmbname), inet_ntoa(released_ip),
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subrec->subnet_name) );
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int orig_num = namerec->data.num_ips;
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remove_ip_from_name_record( namerec, released_ip );
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if( namerec->data.num_ips == orig_num ) {
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DEBUG( 0, ( "standard_success_release: Name release for name %s IP %s \
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on subnet %s. This ip is not known for this name.\n", nmb_namestr(nmbname), inet_ntoa(released_ip), subrec->subnet_name ) );
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if( namerec->data.num_ips == 0 ) {
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remove_name_from_namelist( subrec, namerec );
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/*******************************************************************
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Expires old names in a subnet namelist.
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NB. Does not touch the wins_subnet - no wins specific processing here.
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******************************************************************/
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static void expire_names_on_subnet(struct subnet_record *subrec, time_t t)
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struct name_record *namerec;
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struct name_record *next_namerec;
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for( namerec = subrec->namelist; namerec; namerec = next_namerec ) {
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next_namerec = namerec->next;
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if( (namerec->data.death_time != PERMANENT_TTL) && (namerec->data.death_time < t) ) {
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if( namerec->data.source == SELF_NAME ) {
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DEBUG( 3, ( "expire_names_on_subnet: Subnet %s not expiring SELF \
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name %s\n", subrec->subnet_name, nmb_namestr(&namerec->name) ) );
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namerec->data.death_time += 300;
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namerec->subnet->namelist_changed = True;
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DEBUG(3,("expire_names_on_subnet: Subnet %s - removing expired name %s\n",
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subrec->subnet_name, nmb_namestr(&namerec->name)));
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remove_name_from_namelist(subrec, namerec );
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/*******************************************************************
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Expires old names in all subnet namelists.
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NB. Does not touch the wins_subnet.
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******************************************************************/
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void expire_names(time_t t)
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struct subnet_record *subrec;
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for( subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec) ) {
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expire_names_on_subnet( subrec, t );
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/****************************************************************************
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Add the magic samba names, useful for finding samba servers.
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These go directly into the name list for a particular subnet,
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without going through the normal registration process.
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When adding them to the unicast subnet, add them as a list of
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all broadcast subnet IP addresses.
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**************************************************************************/
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void add_samba_names_to_subnet( struct subnet_record *subrec )
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struct in_addr *iplist = &subrec->myip;
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/* These names are added permanently (ttl of zero) and will NOT be refreshed. */
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if( (subrec == unicast_subnet) || (subrec == wins_server_subnet) || (subrec == remote_broadcast_subnet) ) {
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struct subnet_record *bcast_subrecs;
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/* Create an IP list containing all our known subnets. */
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num_ips = iface_count();
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iplist = SMB_MALLOC_ARRAY( struct in_addr, num_ips);
503
if( NULL == iplist ) {
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DEBUG(0,("add_samba_names_to_subnet: Malloc fail !\n"));
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for( bcast_subrecs = FIRST_SUBNET, i = 0; bcast_subrecs; bcast_subrecs = NEXT_SUBNET_EXCLUDING_UNICAST(bcast_subrecs), i++ )
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iplist[i] = bcast_subrecs->myip;
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add_name_to_subnet(subrec,"*",0x0,samba_nb_type, PERMANENT_TTL,
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PERMANENT_NAME, num_ips, iplist);
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add_name_to_subnet(subrec,"*",0x20,samba_nb_type,PERMANENT_TTL,
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PERMANENT_NAME, num_ips, iplist);
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add_name_to_subnet(subrec,"__SAMBA__",0x20,samba_nb_type,PERMANENT_TTL,
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PERMANENT_NAME, num_ips, iplist);
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add_name_to_subnet(subrec,"__SAMBA__",0x00,samba_nb_type,PERMANENT_TTL,
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PERMANENT_NAME, num_ips, iplist);
521
if(iplist != &subrec->myip) {
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/****************************************************************************
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Dump a name_record struct.
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**************************************************************************/
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void dump_name_record( struct name_record *namerec, XFILE *fp)
532
const char *src_type;
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x_fprintf(fp,"\tName = %s\t", nmb_namestr(&namerec->name));
537
switch(namerec->data.source) {
539
src_type = "LMHOSTS_NAME";
541
case WINS_PROXY_NAME:
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src_type = "WINS_PROXY_NAME";
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src_type = "REGISTER_NAME";
548
src_type = "SELF_NAME";
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src_type = "DNS_NAME";
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src_type = "DNSFAIL_NAME";
557
src_type = "PERMANENT_NAME";
560
src_type = "unknown!";
564
x_fprintf(fp,"Source = %s\nb_flags = %x\t", src_type, namerec->data.nb_flags);
566
if(namerec->data.death_time != PERMANENT_TTL) {
568
tm = localtime(&namerec->data.death_time);
576
x_fprintf(fp, "death_time = %s\t", asct);
578
x_fprintf(fp, "death_time = PERMANENT\t");
581
if(namerec->data.refresh_time != PERMANENT_TTL) {
583
tm = localtime(&namerec->data.refresh_time);
591
x_fprintf(fp, "refresh_time = %s\n", asct);
593
x_fprintf(fp, "refresh_time = PERMANENT\n");
596
x_fprintf(fp, "\t\tnumber of IPS = %d", namerec->data.num_ips);
597
for(i = 0; i < namerec->data.num_ips; i++) {
598
x_fprintf(fp, "\t%s", inet_ntoa(namerec->data.ip[i]));
601
x_fprintf(fp, "\n\n");
605
/****************************************************************************
606
Dump the contents of the namelists on all the subnets (including unicast)
607
into a file. Initiated by SIGHUP - used to debug the state of the namelists.
608
**************************************************************************/
610
static void dump_subnet_namelist( struct subnet_record *subrec, XFILE *fp)
612
struct name_record *namerec;
613
x_fprintf(fp, "Subnet %s\n----------------------\n", subrec->subnet_name);
614
for( namerec = subrec->namelist; namerec; namerec = namerec->next) {
615
dump_name_record(namerec, fp);
619
/****************************************************************************
620
Dump the contents of the namelists on all the subnets (including unicast)
621
into a file. Initiated by SIGHUP - used to debug the state of the namelists.
622
**************************************************************************/
624
void dump_all_namelists(void)
627
struct subnet_record *subrec;
629
fp = x_fopen(lock_path("namelist.debug"),O_WRONLY|O_CREAT|O_TRUNC, 0644);
632
DEBUG(0,("dump_all_namelists: Can't open file %s. Error was %s\n",
633
"namelist.debug",strerror(errno)));
637
for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
638
dump_subnet_namelist( subrec, fp );
641
if (!we_are_a_wins_client()) {
642
dump_subnet_namelist( unicast_subnet, fp );
645
if (remote_broadcast_subnet->namelist != NULL) {
646
dump_subnet_namelist( remote_broadcast_subnet, fp );
649
if (wins_server_subnet != NULL) {
650
dump_wins_subnet_namelist(fp );
added
removed
source/nmbd/nmbd_namelistdb.c
