blob: 71b9cbff4a08e60a427d41b6ef09ca92c1893d8f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright 2015 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onosproject.bgpio.protocol;
import org.jboss.netty.buffer.ChannelBuffer;
import org.onosproject.bgpio.exceptions.BGPParseException;
import org.onosproject.bgpio.protocol.ver4.BGPFactoryVer4;
import org.onosproject.bgpio.types.BGPHeader;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Abstraction to provide the version for BGP.
*/
public final class BGPFactories {
protected static final Logger log = LoggerFactory.getLogger(BGPFactories.class);
private static final GenericReader GENERIC_READER = new GenericReader();
private BGPFactories() {
}
/**
* Returns the instance of BGP Version.
*
* @param version BGP version
* @return BGP version
*/
public static BGPFactory getFactory(BGPVersion version) {
switch (version) {
case BGP_4:
return BGPFactoryVer4.INSTANCE;
default:
throw new IllegalArgumentException("[BGPFactory:]Unknown version: " + version);
}
}
/**
* Reader class for reading BGP messages from channel buffer.
*
*/
private static class GenericReader implements BGPMessageReader<BGPMessage> {
@Override
public BGPMessage readFrom(ChannelBuffer bb, BGPHeader bgpHeader)
throws BGPParseException {
BGPFactory factory;
if (!bb.readable()) {
log.error("Empty message received");
throw new BGPParseException("Empty message received");
}
// TODO: Currently only BGP version 4 is supported
factory = org.onosproject.bgpio.protocol.ver4.BGPFactoryVer4.INSTANCE;
return factory.getReader().readFrom(bb, bgpHeader);
}
}
/**
* Returns BGP messsage generic reader.
*
* @return bgp message generic reader
*/
public static BGPMessageReader<BGPMessage> getGenericReader() {
return GENERIC_READER;
}
}
|
