*/
package org.opendaylight.mdsal.model.ietf.util;
-import com.google.common.base.Preconditions;
-import com.google.common.base.Verify;
-import com.google.common.net.InetAddresses;
-import java.net.Inet4Address;
-import java.net.InetAddress;
-import javax.annotation.Nonnull;
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Verify.verify;
+
+import java.util.Arrays;
+import org.eclipse.jdt.annotation.NonNull;
/**
* IPv6 address parsing for ietf-inet-types ipv6-address and ipv6-prefix. This is an internal implementation
private static final int INT16SZ = Short.BYTES;
private Ipv6Utils() {
- throw new UnsupportedOperationException();
+
}
/**
- * Convert Ipv6Address object to a valid Canonical v6 address in byte format
+ * Convert Ipv6Address object to a valid Canonical v6 address in byte format.
*
- * @param addrStr IPv6 address string
- * @return byte array of size 16 containing the binary IPv6 address
+ * @param bytes Byte array for output
+ * @param str String representation
+ * @param strLimit String offset which should not be processed
* @throws NullPointerException if ipv6address is null
*/
- public static @Nonnull byte[] bytesForString(final @Nonnull String addrStr) {
- final int percentPos = addrStr.indexOf('%');
- final int addrStrLen = percentPos == -1 ? addrStr.length() : percentPos;
-
- /* Leading :: requires some special handling. */
- int i = 0;
- if (addrStr.charAt(i) == ':') {
- // Note ++i side-effect in check
- Preconditions.checkArgument(addrStr.charAt(++i) == ':', "Invalid v6 address '%s'", addrStr);
- }
-
- final byte[] dst = new byte[INADDR6SZ];
-
- boolean saw_xdigit = false;
- int val = 0;
- int colonp = -1;
- int j = 0;
- int curtok = i;
- while (i < addrStrLen) {
- final char ch = addrStr.charAt(i++);
-
- /* v6 separator */
- if (ch == ':') {
- curtok = i;
- if (!saw_xdigit) {
- /* no need to check separator position validity - regexp does that */
- colonp = j;
- continue;
- }
-
- /* removed overrun check - the regexp checks for valid data */
-
- dst[j++] = (byte) ((val >>> 8) & 0xff);
- dst[j++] = (byte) (val & 0xff);
- saw_xdigit = false;
- val = 0;
- continue;
- }
-
- /* frankenstein - v4 attached to v6, mixed notation */
- if (ch == '.' && ((j + INADDR4SZ) <= INADDR6SZ)) {
-
- /* this has passed the regexp so it is fairly safe to parse it
- * straight away. As v4 addresses do not suffer from the same
- * deficiencies as the java v6 implementation we can invoke it
- * straight away and be done with it
- */
- Preconditions.checkArgument(j != (INADDR6SZ - INADDR4SZ - 1), "Invalid v4 in v6 mapping in %s", addrStr);
- InetAddress _inet_form = InetAddresses.forString(addrStr.substring(curtok, addrStrLen));
-
- Preconditions.checkArgument(_inet_form instanceof Inet4Address);
- System.arraycopy(_inet_form.getAddress(), 0, dst, j, INADDR4SZ);
- j += INADDR4SZ;
-
- saw_xdigit = false;
- break;
- }
-
- /* Business as usual - ipv6 address digit.
- * We can remove all checks from the original BSD code because
- * the regexp has already verified that we are not being fed
- * anything bigger than 0xffff between the separators.
- */
- final int chval = AbstractIetfYangUtil.hexValue(ch);
- val = (val << 4) | chval;
- saw_xdigit = true;
- }
-
- if (saw_xdigit) {
- Verify.verify(j + INT16SZ <= INADDR6SZ, "Overrun in parsing of '%s', should not occur", addrStr);
- dst[j++] = (byte) ((val >> 8) & 0xff);
- dst[j++] = (byte) (val & 0xff);
- }
-
- if (colonp != -1) {
- Verify.verify(j != INADDR6SZ, "Overrun in parsing of '%s', should not occur", addrStr);
+ @SuppressWarnings("checkstyle:localVariableName")
+ static void fillIpv6Bytes(final byte @NonNull[] bytes, final String str, final int strLimit) {
+ // Leading :: requires some special handling.
+ int i = 0;
+ if (str.charAt(i) == ':') {
+ // Note ++i side-effect in check
+ checkArgument(str.charAt(++i) == ':', "Invalid v6 address '%s'", str);
+ }
+
+ boolean haveVal = false;
+ int val = 0;
+ int colonp = -1;
+ int j = 0;
+ int curtok = i;
+ while (i < strLimit) {
+ final char ch = str.charAt(i++);
+
+ // v6 separator
+ if (ch == ':') {
+ curtok = i;
+ if (haveVal) {
+ // removed overrun check - the regexp checks for valid data
+ bytes[j++] = (byte) (val >>> 8 & 0xff);
+ bytes[j++] = (byte) (val & 0xff);
+ haveVal = false;
+ val = 0;
+ } else {
+ // no need to check separator position validity - regexp does that
+ colonp = j;
+ }
+
+ continue;
+ }
+
+ // frankenstein - v4 attached to v6, mixed notation
+ if (ch == '.' && j + INADDR4SZ <= INADDR6SZ) {
+ /*
+ * This has passed the regexp so it is fairly safe to parse it
+ * straight away. Use the Ipv4Utils for that.
+ */
+ Ipv4Utils.fillIpv4Bytes(bytes, j, str, curtok, strLimit);
+ j += INADDR4SZ;
+ haveVal = false;
+ break;
+ }
+
+ /*
+ * Business as usual - ipv6 address digit.
+ * We can remove all checks from the original BSD code because
+ * the regexp has already verified that we are not being fed
+ * anything bigger than 0xffff between the separators.
+ */
+ final int chval = AbstractIetfYangUtil.hexValue(ch);
+ val = val << 4 | chval;
+ haveVal = true;
+ }
+
+ if (haveVal) {
+ verifySize(j + INT16SZ <= INADDR6SZ, str);
+ bytes[j++] = (byte) (val >> 8 & 0xff);
+ bytes[j++] = (byte) (val & 0xff);
+ }
+
+ if (colonp != -1) {
+ verifySize(j != INADDR6SZ, str);
+ expandZeros(bytes, colonp, j);
+ } else {
+ verifySize(j == INADDR6SZ, str);
+ }
+ }
- final int n = j - colonp;
- for (i = 1; i <= n; i++) {
- dst[INADDR6SZ - i] = dst[colonp + n - i];
- dst[colonp + n - i] = 0;
- }
- } else {
- Verify.verify(j == INADDR6SZ, "Overrun in parsing of '%s', should not occur", addrStr);
- }
+ private static void verifySize(final boolean expression, final String str) {
+ verify(expression, "Overrun in parsing of '%s', should not occur", str);
+ }
- return dst;
- }
+ private static void expandZeros(final byte[] bytes, final int where, final int filledBytes) {
+ final int tailLength = filledBytes - where;
+ final int tailOffset = INADDR6SZ - tailLength;
+ System.arraycopy(bytes, where, bytes, tailOffset, tailLength);
+ Arrays.fill(bytes, where, tailOffset, (byte)0);
+ }
}
Code Review / mdsal.git / blobdiff