source: branches/samba-3.5.x/libcli/nbt/namequery.c@ 770

Last change on this file since 770 was 414, checked in by Herwig Bauernfeind, 16 years ago

Samba 3.5.0: Initial import
File size: 6.2 KB
Line 
1/*
2 Unix SMB/CIFS implementation.
3
4 make nbt name query requests
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 query
29*/
30_PUBLIC_ struct nbt_name_request *nbt_name_query_send(struct nbt_name_socket *nbtsock,
31 struct nbt_name_query *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->operation = NBT_OPCODE_QUERY;
42 if (io->in.broadcast) {
43 packet->operation |= NBT_FLAG_BROADCAST;
44 }
45 if (io->in.wins_lookup) {
46 packet->operation |= NBT_FLAG_RECURSION_DESIRED;
47 }
48
49 packet->questions = talloc_array(packet, struct nbt_name_question, 1);
50 if (packet->questions == NULL) goto failed;
51
52 packet->questions[0].name = io->in.name;
53 packet->questions[0].question_type = NBT_QTYPE_NETBIOS;
54 packet->questions[0].question_class = NBT_QCLASS_IP;
55
56 dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
57 io->in.dest_addr, io->in.dest_port);
58 if (dest == NULL) goto failed;
59 req = nbt_name_request_send(nbtsock, dest, packet,
60 io->in.timeout, io->in.retries, false);
61 if (req == NULL) goto failed;
62
63 talloc_free(packet);
64 return req;
65
66failed:
67 talloc_free(packet);
68 return NULL;
69}
70
71/**
72 wait for a name query reply
73*/
74_PUBLIC_ NTSTATUS nbt_name_query_recv(struct nbt_name_request *req,
75 TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
76{
77 NTSTATUS status;
78 struct nbt_name_packet *packet;
79 int i;
80
81 status = nbt_name_request_recv(req);
82 if (!NT_STATUS_IS_OK(status) ||
83 req->num_replies == 0) {
84 talloc_free(req);
85 return status;
86 }
87
88 packet = req->replies[0].packet;
89 io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
90
91 if ((packet->operation & NBT_RCODE) != 0) {
92 status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
93 talloc_free(req);
94 return status;
95 }
96
97 if (packet->ancount != 1 ||
98 packet->answers[0].rr_type != NBT_QTYPE_NETBIOS ||
99 packet->answers[0].rr_class != NBT_QCLASS_IP) {
100 talloc_free(req);
101 return status;
102 }
103
104 io->out.name = packet->answers[0].name;
105 io->out.num_addrs = packet->answers[0].rdata.netbios.length / 6;
106 io->out.reply_addrs = talloc_array(mem_ctx, const char *, io->out.num_addrs+1);
107 if (io->out.reply_addrs == NULL) {
108 talloc_free(req);
109 return NT_STATUS_NO_MEMORY;
110 }
111
112 for (i=0;i<io->out.num_addrs;i++) {
113 io->out.reply_addrs[i] = talloc_steal(io->out.reply_addrs,
114 packet->answers[0].rdata.netbios.addresses[i].ipaddr);
115 }
116 io->out.reply_addrs[i] = NULL;
117
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 wait for a name query reply
128*/
129_PUBLIC_ NTSTATUS nbt_name_query(struct nbt_name_socket *nbtsock,
130 TALLOC_CTX *mem_ctx, struct nbt_name_query *io)
131{
132 struct nbt_name_request *req = nbt_name_query_send(nbtsock, io);
133 return nbt_name_query_recv(req, mem_ctx, io);
134}
135
136
137/**
138 send a nbt name status
139*/
140_PUBLIC_ struct nbt_name_request *nbt_name_status_send(struct nbt_name_socket *nbtsock,
141 struct nbt_name_status *io)
142{
143 struct nbt_name_request *req;
144 struct nbt_name_packet *packet;
145 struct socket_address *dest;
146
147 packet = talloc_zero(nbtsock, struct nbt_name_packet);
148 if (packet == NULL) return NULL;
149
150 packet->qdcount = 1;
151 packet->operation = NBT_OPCODE_QUERY;
152
153 packet->questions = talloc_array(packet, struct nbt_name_question, 1);
154 if (packet->questions == NULL) goto failed;
155
156 packet->questions[0].name = io->in.name;
157 packet->questions[0].question_type = NBT_QTYPE_STATUS;
158 packet->questions[0].question_class = NBT_QCLASS_IP;
159
160 dest = socket_address_from_strings(packet, nbtsock->sock->backend_name,
161 io->in.dest_addr, io->in.dest_port);
162 if (dest == NULL) goto failed;
163 req = nbt_name_request_send(nbtsock, dest, packet,
164 io->in.timeout, io->in.retries, false);
165 if (req == NULL) goto failed;
166
167 talloc_free(packet);
168 return req;
169
170failed:
171 talloc_free(packet);
172 return NULL;
173}
174
175/**
176 wait for a name status reply
177*/
178_PUBLIC_ NTSTATUS nbt_name_status_recv(struct nbt_name_request *req,
179 TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
180{
181 NTSTATUS status;
182 struct nbt_name_packet *packet;
183 int i;
184
185 status = nbt_name_request_recv(req);
186 if (!NT_STATUS_IS_OK(status) ||
187 req->num_replies == 0) {
188 talloc_free(req);
189 return status;
190 }
191
192 packet = req->replies[0].packet;
193 io->out.reply_from = talloc_steal(mem_ctx, req->replies[0].dest->addr);
194
195 if ((packet->operation & NBT_RCODE) != 0) {
196 status = nbt_rcode_to_ntstatus(packet->operation & NBT_RCODE);
197 talloc_free(req);
198 return status;
199 }
200
201 if (packet->ancount != 1 ||
202 packet->answers[0].rr_type != NBT_QTYPE_STATUS ||
203 packet->answers[0].rr_class != NBT_QCLASS_IP) {
204 talloc_free(req);
205 return NT_STATUS_INVALID_NETWORK_RESPONSE;
206 }
207
208 io->out.name = packet->answers[0].name;
209 talloc_steal(mem_ctx, io->out.name.name);
210 talloc_steal(mem_ctx, io->out.name.scope);
211
212 io->out.status = packet->answers[0].rdata.status;
213 talloc_steal(mem_ctx, io->out.status.names);
214 for (i=0;i<io->out.status.num_names;i++) {
215 talloc_steal(io->out.status.names, io->out.status.names[i].name);
216 }
217
218
219 talloc_free(req);
220
221 return NT_STATUS_OK;
222}
223
224/**
225 wait for a name status reply
226*/
227_PUBLIC_ NTSTATUS nbt_name_status(struct nbt_name_socket *nbtsock,
228 TALLOC_CTX *mem_ctx, struct nbt_name_status *io)
229{
230 struct nbt_name_request *req = nbt_name_status_send(nbtsock, io);
231 return nbt_name_status_recv(req, mem_ctx, io);
232}
233
234
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