package io.netty.handler.codec.socks;
import io.netty.buffer.ByteBuf;
import io.netty.util.CharsetUtil;
import io.netty.util.internal.StringUtil;
final class SocksCommonUtils {
public static final SocksRequest UNKNOWN_SOCKS_REQUEST = new UnknownSocksRequest();
public static final SocksResponse UNKNOWN_SOCKS_RESPONSE = new UnknownSocksResponse();
private SocksCommonUtils() {
}
private static final char ipv6hextetSeparator = ':';
public static String ipv6toStr(byte[] src) {
assert src.length == 16;
StringBuilder sb = new StringBuilder(39);
ipv6toStr(sb, src, 0, 8);
return sb.toString();
}
private static void ipv6toStr(StringBuilder sb, byte[] src, int fromHextet, int toHextet) {
int i;
toHextet --;
for (i = fromHextet; i < toHextet; i++) {
appendHextet(sb, src, i);
sb.append(ipv6hextetSeparator);
}
appendHextet(sb, src, i);
}
private static void appendHextet(StringBuilder sb, byte[] src, int i) {
StringUtil.toHexString(sb, src, i << 1, 2);
}
static String readUsAscii(ByteBuf buffer, int length) {
String s = buffer.toString(buffer.readerIndex(), length, CharsetUtil.US_ASCII);
buffer.skipBytes(length);
return s;
}
}