1/*
2   Unix SMB/CIFS implementation.
3   NBT netbios routines and daemon - version 2
4   Copyright (C) Andrew Tridgell 1994-1998
5   Copyright (C) Luke Kenneth Casson Leighton 1994-1998
6   Copyright (C) Jeremy Allison 1994-2003
7
8   This program is free software; you can redistribute it and/or modify
9   it under the terms of the GNU General Public License as published by
10   the Free Software Foundation; either version 2 of the License, or
11   (at your option) any later version.
12
13   This program is distributed in the hope that it will be useful,
14   but WITHOUT ANY WARRANTY; without even the implied warranty of
15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16   GNU General Public License for more details.
17
18   You should have received a copy of the GNU General Public License
19   along with this program; if not, write to the Free Software
20   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21
22*/
23
24#include "includes.h"
25
26extern struct in_addr allones_ip;
27
28extern uint16 samba_nb_type; /* Samba's NetBIOS type. */
29
30/****************************************************************************
31  Fail to become a Logon server on a subnet.
32****************************************************************************/
33
34static void become_logon_server_fail(struct subnet_record *subrec,
35                                      struct response_record *rrec,
36                                      struct nmb_name *fail_name)
37{
38	unstring failname;
39	struct work_record *work;
40	struct server_record *servrec;
41
42	pull_ascii_nstring(failname, sizeof(failname), fail_name->name);
43	work = find_workgroup_on_subnet(subrec, failname);
44	if(!work) {
45		DEBUG(0,("become_logon_server_fail: Error - cannot find \
46workgroup %s on subnet %s\n", failname, subrec->subnet_name));
47		return;
48	}
49
50	if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
51		DEBUG(0,("become_logon_server_fail: Error - cannot find server %s \
52in workgroup %s on subnet %s\n",
53			global_myname(), failname, subrec->subnet_name));
54		work->log_state = LOGON_NONE;
55		return;
56	}
57
58	/* Set the state back to LOGON_NONE. */
59	work->log_state = LOGON_NONE;
60
61	servrec->serv.type &= ~SV_TYPE_DOMAIN_CTRL;
62
63	DEBUG(0,("become_logon_server_fail: Failed to become a domain master for \
64workgroup %s on subnet %s. Couldn't register name %s.\n",
65		work->work_group, subrec->subnet_name, nmb_namestr(fail_name)));
66
67}
68
69/****************************************************************************
70  Become a Logon server on a subnet.
71  ****************************************************************************/
72
73static void become_logon_server_success(struct subnet_record *subrec,
74                                        struct userdata_struct *userdata,
75                                        struct nmb_name *registered_name,
76                                        uint16 nb_flags,
77                                        int ttl, struct in_addr registered_ip)
78{
79	unstring reg_name;
80	struct work_record *work;
81	struct server_record *servrec;
82
83	pull_ascii_nstring(reg_name, sizeof(reg_name), registered_name->name);
84	work = find_workgroup_on_subnet( subrec, reg_name);
85	if(!work) {
86		DEBUG(0,("become_logon_server_success: Error - cannot find \
87workgroup %s on subnet %s\n", reg_name, subrec->subnet_name));
88		return;
89	}
90
91	if((servrec = find_server_in_workgroup( work, global_myname())) == NULL) {
92		DEBUG(0,("become_logon_server_success: Error - cannot find server %s \
93in workgroup %s on subnet %s\n",
94			global_myname(), reg_name, subrec->subnet_name));
95		work->log_state = LOGON_NONE;
96		return;
97	}
98
99	/* Set the state in the workgroup structure. */
100	work->log_state = LOGON_SRV; /* Become domain master. */
101
102	/* Update our server status. */
103	servrec->serv.type |= (SV_TYPE_NT|SV_TYPE_DOMAIN_MEMBER);
104	/* To allow Win95 policies to load we need to set type domain
105		controller.
106	*/
107	servrec->serv.type |= SV_TYPE_DOMAIN_CTRL;
108
109	/* Tell the namelist writer to write out a change. */
110	subrec->work_changed = True;
111
112	/*
113	 * Add the WORKGROUP<1C> name to the UNICAST subnet with the IP address
114	 * for this subnet so we will respond to queries on this name.
115	 */
116
117	{
118		struct nmb_name nmbname;
119		make_nmb_name(&nmbname,lp_workgroup(),0x1c);
120		insert_permanent_name_into_unicast(subrec, &nmbname, 0x1c);
121	}
122
123	DEBUG(0,("become_logon_server_success: Samba is now a logon server \
124for workgroup %s on subnet %s\n", work->work_group, subrec->subnet_name));
125}
126
127/*******************************************************************
128  Become a logon server by attempting to register the WORKGROUP<1c>
129  group name.
130******************************************************************/
131
132static void become_logon_server(struct subnet_record *subrec,
133                                struct work_record *work)
134{
135	DEBUG(2,("become_logon_server: Atempting to become logon server for workgroup %s \
136on subnet %s\n", work->work_group,subrec->subnet_name));
137
138	DEBUG(3,("become_logon_server: go to first stage: register %s<1c> name\n",
139		work->work_group));
140	work->log_state = LOGON_WAIT;
141
142	register_name(subrec, work->work_group,0x1c,samba_nb_type|NB_GROUP,
143			become_logon_server_success,
144			become_logon_server_fail, NULL);
145}
146
147/*****************************************************************************
148  Add the internet group <1c> logon names by unicast and broadcast.
149  ****************************************************************************/
150
151void add_logon_names(void)
152{
153	struct subnet_record *subrec;
154
155	for (subrec = FIRST_SUBNET; subrec; subrec = NEXT_SUBNET_INCLUDING_UNICAST(subrec)) {
156		struct work_record *work = find_workgroup_on_subnet(subrec, lp_workgroup());
157
158		if (work && (work->log_state == LOGON_NONE)) {
159			struct nmb_name nmbname;
160			make_nmb_name(&nmbname,lp_workgroup(),0x1c);
161
162			if (find_name_on_subnet(subrec, &nmbname, FIND_SELF_NAME) == NULL) {
163				if( DEBUGLVL( 0 ) ) {
164					dbgtext( "add_domain_logon_names:\n" );
165					dbgtext( "Attempting to become logon server " );
166					dbgtext( "for workgroup %s ", lp_workgroup() );
167					dbgtext( "on subnet %s\n", subrec->subnet_name );
168				}
169				become_logon_server(subrec, work);
170			}
171		}
172	}
173}
174