source: branches/samba-3.5.x/libcli/nbt/namerelease.c@ 1075

Last change on this file since 1075 was 414, checked in by Herwig Bauernfeind, 15 years ago

Samba 3.5.0: Initial import
File size: 4.2 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 send out a name release request
5
6 Copyright (C) Andrew Tridgell 2005
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 3 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, see <http://www.gnu.org/licenses/>.
20*/
21
22#include "includes.h"
23#include "../libcli/nbt/libnbt.h"
24#include "../libcli/nbt/nbt_proto.h"
25#include "lib/socket/socket.h"
26
27/*
28 send a nbt name release request
29*/
30_PUBLIC_ struct nbt_name_request *nbt_name_release_send(struct nbt_name_socket *nbtsock,
31 struct nbt_name_release *io)
32{
33 struct nbt_name_request *req;
34 struct nbt_name_packet *packet;
35 struct socket_address *dest;
36
37 packet = talloc_zero(nbtsock, struct nbt_name_packet);
38 if (packet == NULL) return NULL;
39
40 packet->qdcount = 1;
41 packet->arcount = 1;
42 packet->operation = NBT_OPCODE_RELEASE;
43 if (io->in.broadcast) {
44 packet->operation |= NBT_FLAG_BROADCAST;
45 }
46
47 packet->questions = talloc_array(packet, struct nbt_name_question, 1);
48 if (packet->questions == NULL) goto failed;
49
50 packet->questions[0].name = io->in.name;
51 packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
52 packet->questions[0].question_class = NBT_QCLASS_IP;
53
54 packet->additional = talloc_array(packet, struct nbt_res_rec, 1);
55 if (packet->additional == NULL) goto failed;
56
57 packet->additional[0].name = io->in.name;
58 packet->additional[0].rr_type = NBT_QTYPE_NETBIOS;
59 packet->additional[0].rr_class = NBT_QCLASS_IP;
60 packet->additional[0].ttl = 0;
61 packet->additional[0].rdata.netbios.length = 6;
62 packet->additional[0].rdata.netbios.addresses = talloc_array(packet->additional,
63 struct nbt_rdata_address, 1);
64 if (packet->additional[0].rdata.netbios.addresses == NULL) goto failed;
65 packet->additional[0].rdata.netbios.addresses[0].nb_flags = io->in.nb_flags;
66 packet->additional[0].rdata.netbios.addresses[0].ipaddr =
67 talloc_strdup(packet->additional, io->in.address);
68
69 dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
70 io->in.dest_addr, io->in.dest_port);
71 if (dest == NULL) goto failed;
72 req = nbt_name_request_send(nbtsock, dest, packet,
73 io->in.timeout, io->in.retries, false);
74 if (req == NULL) goto failed;
75
76 talloc_free(packet);
77 return req;
78
79failed:
80 talloc_free(packet);
81 return NULL;
82}
83
84/*
85 wait for a release reply
86*/
87_PUBLIC_ NTSTATUS nbt_name_release_recv(struct nbt_name_request *req,
88 TALLOC_CTX *mem_ctx, struct nbt_name_release *io)
89{
90 NTSTATUS status;
91 struct nbt_name_packet *packet;
92
93 status = nbt_name_request_recv(req);
94 if (!NT_STATUS_IS_OK(status) ||
95 req->num_replies == 0) {
96 talloc_free(req);
97 return status;
98 }
99
100 packet = req->replies[0].packet;
101 io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
102
103 if (packet->ancount != 1 ||
104 packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
105 packet->answers[0].rr_class != NBT_QCLASS_IP) {
106 talloc_free(req);
107 return NT_STATUS_INVALID_NETWORK_RESPONSE;
108 }
109
110 io->out.rcode = packet->operation & NBT_RCODE;
111 io->out.name = packet->answers[0].name;
112 if (packet->answers[0].rdata.netbios.length < 6) {
113 talloc_free(req);
114 return NT_STATUS_INVALID_NETWORK_RESPONSE;
115 }
116 io->out.reply_addr = talloc_steal(mem_ctx,
117 packet->answers[0].rdata.netbios.addresses[0].ipaddr);
118 talloc_steal(mem_ctx, io->out.name.name);
119 talloc_steal(mem_ctx, io->out.name.scope);
120
121 talloc_free(req);
122
123 return NT_STATUS_OK;
124}
125
126/*
127 synchronous name release request
128*/
129_PUBLIC_ NTSTATUS nbt_name_release(struct nbt_name_socket *nbtsock,
130 TALLOC_CTX *mem_ctx, struct nbt_name_release *io)
131{
132 struct nbt_name_request *req = nbt_name_release_send(nbtsock, io);
133 return nbt_name_release_recv(req, mem_ctx, io);
134}
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