@Override
protected int calcLength() {
int len = 0;
for (IpV6NeighborDiscoveryOption o : options) {
len += o.length();
}
return len + OPTIONS_OFFSET;
}
private IcmpV6NeighborAdvertisementHeader(byte[] rawData, int offset, int length)
throws IllegalRawDataException {
if (length < OPTIONS_OFFSET) {
StringBuilder sb = new StringBuilder(120);
sb.append("The raw data must be more than ")
.append(OPTIONS_OFFSET - 1)
.append("bytes")
.append(" to build this header. raw data: ")
.append(ByteArrays.toHexString(rawData, " "))
.append(", offset: ")
.append(offset)
.append(", length: ")
.append(length);
throw new IllegalRawDataException(sb.toString());
}
int tmp = ByteArrays.getInt(rawData, R_S_O_RESERVED_OFFSET + offset);
this.routerFlag = (tmp & 0x80000000) != 0;
this.solicitedFlag = (tmp & 0x40000000) != 0;
this.overrideFlag = (tmp & 0x20000000) != 0;
this.reserved = 0x1FFFFFFF & tmp;
this.targetAddress = ByteArrays.getInet6Address(rawData, TARGET_ADDRESS_OFFSET + offset);
this.options = new ArrayList<IpV6NeighborDiscoveryOption>();
int currentOffsetInHeader = OPTIONS_OFFSET;
while (currentOffsetInHeader < length) {
IpV6NeighborDiscoveryOptionType type =
IpV6NeighborDiscoveryOptionType.getInstance(rawData[currentOffsetInHeader + offset]);
IpV6NeighborDiscoveryOption newOne;
try {
newOne =
PacketFactories.getFactory(
IpV6NeighborDiscoveryOption.class, IpV6NeighborDiscoveryOptionType.class)
.newInstance(
rawData,
currentOffsetInHeader + offset,
length - currentOffsetInHeader,
type);
} catch (Exception e) {
break;
}
options.add(newOne);
currentOffsetInHeader += newOne.length();
}
}
@Override
protected List<byte[]> getRawFields() {
List<byte[]> rawFields = new ArrayList<byte[]>();
int tmp = 0x1FFFFFFF & reserved;
if (routerFlag) {
tmp |= 0x80000000;
}
if (solicitedFlag) {
tmp |= 0x40000000;
}
if (overrideFlag) {
tmp |= 0x20000000;
}
rawFields.add(ByteArrays.toByteArray(tmp));
rawFields.add(ByteArrays.toByteArray(targetAddress));
for (IpV6NeighborDiscoveryOption o : options) {
rawFields.add(o.getRawData());
}
return rawFields;
}
