| 1 | /*
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| 2 | Unix SMB/CIFS implementation.
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| 3 | NBT netbios routines and daemon - version 2
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| 4 | Copyright (C) Andrew Tridgell 1994-1998
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| 5 | Copyright (C) Luke Kenneth Casson Leighton 1994-1998
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| 6 | Copyright (C) Jeremy Allison 1994-2003
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| 7 |
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| 8 | This program is free software; you can redistribute it and/or modify
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| 9 | it under the terms of the GNU General Public License as published by
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| 10 | the Free Software Foundation; either version 2 of the License, or
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| 11 | (at your option) any later version.
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| 12 |
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| 13 | This program is distributed in the hope that it will be useful,
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| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 16 | GNU General Public License for more details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with this program; if not, write to the Free Software
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| 20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 21 |
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| 22 | */
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| 23 |
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| 24 | #include "includes.h"
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| 25 |
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| 26 | /****************************************************************************
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| 27 | Deal with a successful node status response.
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| 28 | ****************************************************************************/
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| 29 |
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| 30 | static void node_status_response(struct subnet_record *subrec,
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| 31 | struct response_record *rrec, struct packet_struct *p)
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| 32 | {
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| 33 | struct nmb_packet *nmb = &p->packet.nmb;
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| 34 | struct nmb_name *question_name = &rrec->packet->packet.nmb.question.question_name;
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| 35 | struct nmb_name *answer_name = &nmb->answers->rr_name;
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| 36 |
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| 37 | /* Sanity check. Ensure that the answer name in the incoming packet is the
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| 38 | same as the requested name in the outgoing packet. */
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| 39 |
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| 40 | if(!nmb_name_equal(question_name, answer_name)) {
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| 41 | DEBUG(0,("node_status_response: Answer name %s differs from question \
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| 42 | name %s.\n", nmb_namestr(answer_name), nmb_namestr(question_name)));
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| 43 | return;
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| 44 | }
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| 45 |
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| 46 | DEBUG(5,("node_status_response: response from name %s on subnet %s.\n",
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| 47 | nmb_namestr(answer_name), subrec->subnet_name));
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| 48 |
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| 49 | /* Just send the whole answer resource record for the success function to parse. */
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| 50 | if(rrec->success_fn)
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| 51 | (*(node_status_success_function)rrec->success_fn)(subrec, rrec->userdata, nmb->answers, p->ip);
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| 52 |
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| 53 | /* Ensure we don't retry. */
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| 54 | remove_response_record(subrec, rrec);
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| 55 | }
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| 56 |
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| 57 | /****************************************************************************
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| 58 | Deal with a timeout when requesting a node status.
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| 59 | ****************************************************************************/
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| 60 |
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| 61 | static void node_status_timeout_response(struct subnet_record *subrec,
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| 62 | struct response_record *rrec)
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| 63 | {
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| 64 | struct nmb_packet *sent_nmb = &rrec->packet->packet.nmb;
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| 65 | struct nmb_name *question_name = &sent_nmb->question.question_name;
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| 66 |
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| 67 | DEBUG(5,("node_status_timeout_response: failed to get node status from name %s on subnet %s\n",
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| 68 | nmb_namestr(question_name), subrec->subnet_name));
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| 69 |
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| 70 | if( rrec->fail_fn)
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| 71 | (*rrec->fail_fn)(subrec, rrec);
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| 72 |
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| 73 | /* Ensure we don't retry. */
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| 74 | remove_response_record(subrec, rrec);
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| 75 | }
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| 76 |
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| 77 | /****************************************************************************
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| 78 | Try and do a node status to a name - given the name & IP address.
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| 79 | ****************************************************************************/
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| 80 |
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| 81 | BOOL node_status(struct subnet_record *subrec, struct nmb_name *nmbname,
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| 82 | struct in_addr send_ip, node_status_success_function success_fn,
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| 83 | node_status_fail_function fail_fn, struct userdata_struct *userdata)
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| 84 | {
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| 85 | if(queue_node_status( subrec, node_status_response, node_status_timeout_response,
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| 86 | success_fn, fail_fn, userdata, nmbname, send_ip)==NULL) {
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| 87 | DEBUG(0,("node_status: Failed to send packet trying to get node status for \
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| 88 | name %s, IP address %s\n", nmb_namestr(nmbname), inet_ntoa(send_ip)));
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| 89 | return True;
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| 90 | }
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| 91 | return False;
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| 92 | }
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