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
26/****************************************************************************
27 Deal with a successful node status response.
28****************************************************************************/
29
30static void node_status_response(struct subnet_record *subrec,
31                       struct response_record *rrec, struct packet_struct *p)
32{
33	struct nmb_packet *nmb = &p->packet.nmb;
34	struct nmb_name *question_name = &rrec->packet->packet.nmb.question.question_name;
35	struct nmb_name *answer_name = &nmb->answers->rr_name;
36
37	/* Sanity check. Ensure that the answer name in the incoming packet is the
38		same as the requested name in the outgoing packet. */
39
40	if(!nmb_name_equal(question_name, answer_name)) {
41		DEBUG(0,("node_status_response: Answer name %s differs from question \
42name %s.\n", nmb_namestr(answer_name), nmb_namestr(question_name)));
43		return;
44	}
45
46	DEBUG(5,("node_status_response: response from name %s on subnet %s.\n",
47		nmb_namestr(answer_name), subrec->subnet_name));
48
49	/* Just send the whole answer resource record for the success function to parse. */
50	if(rrec->success_fn)
51		(*(node_status_success_function)rrec->success_fn)(subrec, rrec->userdata, nmb->answers, p->ip);
52
53	/* Ensure we don't retry. */
54	remove_response_record(subrec, rrec);
55}
56
57/****************************************************************************
58 Deal with a timeout when requesting a node status.
59****************************************************************************/
60
61static void node_status_timeout_response(struct subnet_record *subrec,
62                       struct response_record *rrec)
63{
64	struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb;
65	struct nmb_name *question_name = &sent_nmb->question.question_name;
66
67	DEBUG(5,("node_status_timeout_response: failed to get node status from name %s on subnet %s\n",
68		nmb_namestr(question_name), subrec->subnet_name));
69
70	if( rrec->fail_fn)
71		(*rrec->fail_fn)(subrec, rrec);
72
73	/* Ensure we don't retry. */
74	remove_response_record(subrec, rrec);
75}
76
77/****************************************************************************
78 Try and do a node status to a name - given the name & IP address.
79****************************************************************************/
80
81BOOL node_status(struct subnet_record *subrec, struct nmb_name *nmbname,
82                 struct in_addr send_ip, node_status_success_function success_fn,
83                 node_status_fail_function fail_fn, struct userdata_struct *userdata)
84{
85	if(queue_node_status( subrec, node_status_response, node_status_timeout_response,
86				success_fn, fail_fn, userdata, nmbname, send_ip)==NULL) {
87		DEBUG(0,("node_status: Failed to send packet trying to get node status for \
88name %s, IP address %s\n", nmb_namestr(nmbname), inet_ntoa(send_ip)));
89		return True;
90	}
91	return False;
92}
93