ExpandedEAPMethod.java revision 7b2caa25fb57f2d95e0d0421704c49d3af4b8e6f 
1package com.android.server.wifi.anqp.eap;
2
3import java.net.ProtocolException;
4import java.nio.ByteBuffer;
5import java.nio.ByteOrder;
6
7import static com.android.server.wifi.anqp.Constants.BYTE_MASK;
8import static com.android.server.wifi.anqp.Constants.INT_MASK;
9import static com.android.server.wifi.anqp.Constants.SHORT_MASK;
10
11/**
12 * An EAP authentication parameter, IEEE802.11-2012, table 8-188
13 */
14public class ExpandedEAPMethod implements AuthParam {
15
16    private final EAP.AuthInfoID mAuthInfoID;
17    private final int mVendorID;
18    private final long mVendorType;
19
20    public ExpandedEAPMethod(EAP.AuthInfoID authInfoID, int length, ByteBuffer payload)
21            throws ProtocolException {
22        if (length != 7) {
23            throw new ProtocolException("Bad length: " + payload.remaining());
24        }
25
26        mAuthInfoID = authInfoID;
27
28        ByteBuffer vndBuffer = payload.duplicate().order(ByteOrder.BIG_ENDIAN);
29
30        int id = vndBuffer.getShort() & SHORT_MASK;
31        id = (id << Byte.SIZE) | (vndBuffer.get() & BYTE_MASK);
32        mVendorID = id;
33        mVendorType = vndBuffer.getInt() & INT_MASK;
34
35        payload.position(payload.position()+7);
36    }
37
38    @Override
39    public EAP.AuthInfoID getAuthInfoID() {
40        return mAuthInfoID;
41    }
42
43    @Override
44    public int hashCode() {
45        return (mAuthInfoID.hashCode() * 31 + mVendorID) * 31 + (int) mVendorType;
46    }
47
48    @Override
49    public boolean equals(Object thatObject) {
50        if (thatObject == this) {
51            return true;
52        } else if (thatObject == null || thatObject.getClass() != ExpandedEAPMethod.class) {
53            return false;
54        } else {
55            ExpandedEAPMethod that = (ExpandedEAPMethod) thatObject;
56            return that.getVendorID() == getVendorID() && that.getVendorType() == getVendorType();
57        }
58    }
59
60    public int getVendorID() {
61        return mVendorID;
62    }
63
64    public long getVendorType() {
65        return mVendorType;
66    }
67
68    @Override
69    public String toString() {
70        return "Auth method " + mAuthInfoID + ", id " + mVendorID + ", type " + mVendorType + "\n";
71    }
72}
73