[patch] AccessLogValve patch

tomcat-ipv6-canonical-3.patch (text/plain), 22.92 KB, created by Ognjen Blagojevic on 2013-02-06 11:39:25 UTC

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Description: AccessLogValve patch

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Creator: Ognjen Blagojevic

Created: 2013-02-06 11:39:25 UTC

Size: 22.92 KB

patch

obsolete

>Index: java/org/apache/catalina/valves/AccessLogValve.java >=================================================================== >--- java/org/apache/catalina/valves/AccessLogValve.java (revision 1442555) >+++ java/org/apache/catalina/valves/AccessLogValve.java (working copy) >@@ -54,6 +54,7 @@ > import org.apache.tomcat.util.ExceptionUtils; > import org.apache.tomcat.util.buf.B2CConverter; > import org.apache.tomcat.util.collections.SynchronizedStack; >+import org.apache.tomcat.util.net.IPv6Utils; > > > /** >@@ -228,6 +229,12 @@ > > > /** >+ * Use IPv6 canonical representation format as defined by RFC 5952. >+ */ >+ protected boolean canonical = true; >+ >+ >+ /** > * The PrintWriter to which we are currently logging, if any. > */ > protected PrintWriter writer = null; >@@ -770,6 +777,24 @@ > > > /** >+ * Are IPv6 addresses represented in canonical representation format >+ */ >+ public boolean isCanonical() { >+ return canonical; >+ } >+ >+ >+ /** >+ * Set the value if IPv6 addresses should be represented in canonical representation format? >+ * >+ * @param canonical true if canonical. >+ */ >+ public void setCanonical(boolean canonical) { >+ this.canonical = canonical; >+ } >+ >+ >+ /** > * Return whether the attribute name to look for when > * performing conditional logging. If null, every > * request is logged. >@@ -1290,11 +1315,11 @@ > /** > * write local IP address - %A > */ >- protected static class LocalAddrElement implements AccessLogElement { >+ protected class LocalAddrElement implements AccessLogElement { > >- private static final String LOCAL_ADDR_VALUE; >+ private String localAddrValue; > >- static { >+ private void lazyInit() { > String init; > try { > init = InetAddress.getLocalHost().getHostAddress(); >@@ -1302,13 +1327,20 @@ > ExceptionUtils.handleThrowable(e); > init = "127.0.0.1"; > } >- LOCAL_ADDR_VALUE = init; >+ if (canonical) { >+ localAddrValue = IPv6Utils.canonize(init); >+ } else { >+ localAddrValue = init; >+ } > } > > @Override > public void addElement(CharArrayWriter buf, Date date, Request request, > Response response, long time) { >- buf.append(LOCAL_ADDR_VALUE); >+ if (localAddrValue == null) { >+ lazyInit(); >+ } >+ buf.append(localAddrValue); > } > } > >@@ -1319,16 +1351,22 @@ > @Override > public void addElement(CharArrayWriter buf, Date date, Request request, > Response response, long time) { >+ String value = null; > if (requestAttributesEnabled) { > Object addr = request.getAttribute(REMOTE_ADDR_ATTRIBUTE); > if (addr == null) { >- buf.append(request.getRemoteAddr()); >+ value = request.getRemoteAddr(); > } else { >- buf.append(addr.toString()); >+ value = addr.toString(); > } > } else { >- buf.append(request.getRemoteAddr()); >+ value = request.getRemoteAddr(); > } >+ >+ if (canonical) { >+ value = IPv6Utils.canonize(value); >+ } >+ buf.append(value); > } > } > >@@ -1352,6 +1390,9 @@ > if (value == null || value.length() == 0) { > value = "-"; > } >+ if (canonical) { >+ value = IPv6Utils.canonize(value); >+ } > buf.append(value); > } > } >@@ -1794,11 +1835,15 @@ > /** > * write local server name - %v > */ >- protected static class LocalServerNameElement implements AccessLogElement { >+ protected class LocalServerNameElement implements AccessLogElement { > @Override > public void addElement(CharArrayWriter buf, Date date, Request request, > Response response, long time) { >- buf.append(request.getServerName()); >+ if (canonical) { >+ buf.append(IPv6Utils.canonize(request.getServerName())); >+ } else { >+ buf.append(request.getServerName()); >+ } > } > } > >Index: java/org/apache/tomcat/util/net/IPv6Utils.java >=================================================================== >--- java/org/apache/tomcat/util/net/IPv6Utils.java (revision 0) >+++ java/org/apache/tomcat/util/net/IPv6Utils.java (working copy) >@@ -0,0 +1,252 @@ >+/* >+ * Licensed to the Apache Software Foundation (ASF) under one or more >+ * contributor license agreements. See the NOTICE file distributed with >+ * this work for additional information regarding copyright ownership. >+ * The ASF licenses this file to You 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.apache.tomcat.util.net; >+ >+/** >+ * <p>IPv6 utilities. >+ * <p>For the moment, it only contains function to canonize IPv6 address into >+ * RFC 5952 form. >+ */ >+public class IPv6Utils { >+ >+ private static final int MAX_NUMBER_OF_GROUPS = 8; >+ private static final int MAX_GROUP_LENGTH = 4; >+ >+ /** >+ * <p>Convert IPv6 adress into RFC 5952 form. >+ * E.g. 2001:db8:0:1:0:0:0:1 -> 2001:db8:0:1::1</p> >+ * >+ * <p>Method is null safe, and if IPv4 address or host name is passed to the >+ * method it is returned wihout any processing.</p> >+ * >+ * <p>Method also supports IPv4 in IPv6 (e.g. 0:0:0:0:0:ffff:192.0.2.1 -> >+ * ::ffff:192.0.2.1), and zone ID (e.g. fe80:0:0:0:f0f0:c0c0:1919:1234%4 >+ * -> fe80::f0f0:c0c0:1919:1234%4).</p> >+ * >+ * @param ipv6Address String representing valid IPv6 address. >+ * @return String representing IPv6 in canonical form. >+ * @throws IllegalArgumentException if IPv6 format is unacceptable. >+ */ >+ public static String canonize(String ipv6Address) >+ throws IllegalArgumentException { >+ >+ if (ipv6Address == null) { >+ return null; >+ } >+ >+ // Definitely not an IPv6, return untouched input. >+ if (!mayBeIPv6Address(ipv6Address)) { >+ return ipv6Address; >+ } >+ >+ // Lenght without zone ID (%zone) or IPv4 address >+ int ipv6AddressLength = ipv6Address.length(); >+ if (ipv6Address.contains(":") && ipv6Address.contains(".")) { >+ // IPv4 in IPv6 >+ // e.g. 0:0:0:0:0:FFFF:127.0.0.1 >+ int lastColonPos = ipv6Address.lastIndexOf(":"); >+ int lastColonsPos = ipv6Address.lastIndexOf("::"); >+ if (lastColonsPos >= 0 && lastColonPos == lastColonsPos + 1) { >+ /* >+ * IPv6 part ends with two consecutive colons, >+ * last colon is part of IPv6 format. >+ * e.g. ::127.0.0.1 >+ */ >+ ipv6AddressLength = lastColonPos + 1; >+ } else { >+ /* >+ * IPv6 part ends with only one colon, >+ * last colon is not part of IPv6 format. >+ * e.g. ::FFFF:127.0.0.1 >+ */ >+ ipv6AddressLength = lastColonPos; >+ } >+ } else if (ipv6Address.contains(":") && ipv6Address.contains("%")) { >+ // Zone ID >+ // e.g. fe80:0:0:0:f0f0:c0c0:1919:1234%4 >+ ipv6AddressLength = ipv6Address.lastIndexOf("%"); >+ } >+ >+ StringBuilder result = new StringBuilder(); >+ char [][] groups = new char[MAX_NUMBER_OF_GROUPS][MAX_GROUP_LENGTH]; >+ int groupCounter = 0; >+ int charInGroupCounter = 0; >+ >+ // Index of the current zeroGroup, -1 means not found. >+ int zeroGroupIndex = -1; >+ int zeroGroupLength = 0; >+ >+ // maximum length zero group, if there is more then one, then first one >+ int maxZeroGroupIndex = -1; >+ int maxZeroGroupLength = 0; >+ >+ boolean isZero = true; >+ boolean groupStart = true; >+ >+ /* >+ * Two consecutive colons, initial expansion. >+ * e.g. 2001:db8:0:0:1::1 -> 2001:db8:0:0:1:0:0:1 >+ */ >+ >+ StringBuilder expanded = new StringBuilder(ipv6Address); >+ int colonsPos = ipv6Address.indexOf("::"); >+ int length = ipv6AddressLength; >+ int change = 0; >+ >+ if (colonsPos >= 0 && colonsPos < ipv6AddressLength - 2) { >+ int colonCounter = 0; >+ for (int i = 0; i < ipv6AddressLength; i++) { >+ if (ipv6Address.charAt(i) == ':') { >+ colonCounter++; >+ } >+ } >+ >+ if (colonsPos == 0) { >+ expanded.insert(0, "0"); >+ change = change + 1; >+ } >+ >+ for (int i = 0; i < MAX_NUMBER_OF_GROUPS - colonCounter; i++) { >+ expanded.insert(colonsPos + 1, "0:"); >+ change = change + 2; >+ } >+ >+ >+ if (colonsPos == ipv6AddressLength - 2) { >+ expanded.setCharAt(colonsPos + change + 1, '0'); >+ } else { >+ expanded.deleteCharAt(colonsPos + change + 1); >+ change = change - 1; >+ } >+ length = length + change; >+ } >+ >+ >+ // Processing one char at the time >+ for (int charCounter = 0; charCounter < length; charCounter++) { >+ char c = expanded.charAt(charCounter); >+ if (c >= 'A' && c <= 'F') { >+ c = (char) (c + 32); >+ } >+ if (c != ':') { >+ groups[groupCounter][charInGroupCounter] = c; >+ if (!(groupStart && c == '0')) { >+ ++charInGroupCounter; >+ groupStart = false; >+ } >+ if (c != '0') { >+ isZero = false; >+ } >+ } >+ if (c == ':' || charCounter == (length - 1)) { >+ // We reached end of current group >+ if (isZero) { >+ ++zeroGroupLength; >+ if (zeroGroupIndex == -1) { >+ zeroGroupIndex = groupCounter; >+ } >+ } >+ >+ if (!isZero || charCounter == (length - 1)) { >+ // We reached end of zero group >+ if (zeroGroupLength > maxZeroGroupLength) { >+ maxZeroGroupLength = zeroGroupLength; >+ maxZeroGroupIndex = zeroGroupIndex; >+ } >+ zeroGroupLength = 0; >+ zeroGroupIndex = -1; >+ } >+ ++groupCounter; >+ charInGroupCounter = 0; >+ isZero = true; >+ groupStart = true; >+ } >+ } >+ >+ int numberOfGroups = groupCounter; >+ >+ // Output results >+ for (groupCounter = 0; groupCounter < numberOfGroups; groupCounter++) { >+ if (maxZeroGroupLength <= 1 || groupCounter < maxZeroGroupIndex >+ || groupCounter >= maxZeroGroupIndex + maxZeroGroupLength) { >+ for (int j = 0; j < MAX_GROUP_LENGTH; j++) { >+ if (groups[groupCounter][j] != 0) { >+ result.append(groups[groupCounter][j]); >+ } >+ } >+ if (groupCounter < (numberOfGroups - 1) >+ && (groupCounter != maxZeroGroupIndex - 1 >+ || maxZeroGroupLength <= 1)) { >+ result.append(':'); >+ } >+ } else if (groupCounter == maxZeroGroupIndex) { >+ result.append("::"); >+ } >+ } >+ >+ // Solve problem with three colons in IPv4 in IPv6 format >+ // e.g. 0:0:0:0:0:0:127.0.0.1 -> :::127.0.0.1 -> ::127.0.0.1 >+ int resultLength = result.length(); >+ if (result.charAt(resultLength - 1) == ':' && ipv6AddressLength < ipv6Address.length() >+ && ipv6Address.charAt(ipv6AddressLength) == ':') { >+ result.delete(resultLength - 1, resultLength); >+ } >+ >+ /* >+ * Append IPv4 from IPv4-in-IPv6 format or Zone ID >+ */ >+ for (int i = ipv6AddressLength; i < ipv6Address.length(); i++) { >+ result.append(ipv6Address.charAt(i)); >+ } >+ >+ return result.toString(); >+ } >+ >+ /** >+ * Heuristic check if string might be an IPv6 address. >+ * >+ * @param address Any string or null >+ * @return true, if input string contains only hex digits and at least two colons, before '.' or '%' charachter >+ */ >+ protected static boolean mayBeIPv6Address(String input) { >+ if (input == null) { >+ return false; >+ } >+ >+ boolean result = false; >+ int colonsCounter = 0; >+ int length = input.length(); >+ for (int i = 0; i < length; i++) { >+ char c = input.charAt(i); >+ if (c == '.' || c == '%') { >+ // IPv4 in IPv6 or Zone ID detected, end of checking. >+ break; >+ } >+ if (!((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') >+ || (c >= 'A' && c <= 'F') || c == ':')) { >+ return false; >+ } else if (c == ':') { >+ colonsCounter++; >+ } >+ } >+ if (colonsCounter >= 2) { >+ result = true; >+ } >+ return result; >+ } >+ >+} >Index: test/org/apache/tomcat/util/net/IPv6UtilsTest.java >=================================================================== >--- test/org/apache/tomcat/util/net/IPv6UtilsTest.java (revision 0) >+++ test/org/apache/tomcat/util/net/IPv6UtilsTest.java (working copy) >@@ -0,0 +1,147 @@ >+/* >+ * Licensed to the Apache Software Foundation (ASF) under one or more >+ * contributor license agreements. See the NOTICE file distributed with >+ * this work for additional information regarding copyright ownership. >+ * The ASF licenses this file to You 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.apache.tomcat.util.net; >+ >+import static org.junit.Assert.assertEquals; >+import static org.junit.Assert.assertFalse; >+import static org.junit.Assert.assertNull; >+import static org.junit.Assert.assertTrue; >+ >+import org.junit.Test; >+ >+ >+/** >+ * Mostly examples from RFC 5952 >+ */ >+public class IPv6UtilsTest { >+ >+ @Test >+ public void testMayBeIPv6Address() { >+ assertFalse(IPv6Utils.mayBeIPv6Address(null)); >+ >+ assertTrue(IPv6Utils.mayBeIPv6Address("::1")); >+ assertTrue(IPv6Utils.mayBeIPv6Address("::")); >+ assertTrue(IPv6Utils.mayBeIPv6Address("2001:db8:0:0:1:0:0:1")); >+ >+ assertFalse(IPv6Utils.mayBeIPv6Address("")); >+ assertFalse(IPv6Utils.mayBeIPv6Address(":1")); >+ assertFalse(IPv6Utils.mayBeIPv6Address("123.123.123.123")); >+ assertFalse(IPv6Utils.mayBeIPv6Address("tomcat.eu.apache.org:443")); >+ } >+ >+ @Test >+ public void testCanonize() { >+ assertNull(IPv6Utils.canonize(null)); >+ assertEquals("", IPv6Utils.canonize("")); >+ >+ // IPv4-safe >+ assertEquals("123.123.123.123", IPv6Utils.canonize("123.123.123.123")); >+ assertEquals("123.1.2.23", IPv6Utils.canonize("123.1.2.23")); >+ >+ // Introductory RFC 5952 examples >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:db8:0:0:1:0:0:1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:0db8:0:0:1:0:0:1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:db8::1:0:0:1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:db8::0:1:0:0:1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:0db8::1:0:0:1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:db8:0:0:1::1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:db8:0000:0:1::1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:DB8:0:0:1::1")); >+ >+ // Strip leading zeros (2.1) >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:1", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:0001")); >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:1", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:001")); >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:1", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:01")); >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:1", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:1")); >+ >+ // Zero compression (2.2) >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:0:1", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd::1")); >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:0:1", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:0:1")); >+ >+ assertEquals("2001:db8::1", IPv6Utils.canonize("2001:db8:0:0:0::1")); >+ assertEquals("2001:db8::1", IPv6Utils.canonize("2001:db8:0:0::1")); >+ assertEquals("2001:db8::1", IPv6Utils.canonize("2001:db8:0::1")); >+ assertEquals("2001:db8::1", IPv6Utils.canonize("2001:db8::1")); >+ >+ assertEquals("2001:db8::aaaa:0:0:1", IPv6Utils.canonize("2001:db8::aaaa:0:0:1")); >+ assertEquals("2001:db8::aaaa:0:0:1", IPv6Utils.canonize("2001:db8:0:0:aaaa::1")); >+ >+ // Uppercase or lowercase (2.3) >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:aaaa", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:aaaa")); >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:aaaa", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:AAAA")); >+ assertEquals("2001:db8:aaaa:bbbb:cccc:dddd:eeee:aaaa", IPv6Utils.canonize("2001:db8:aaaa:bbbb:cccc:dddd:eeee:AaAa")); >+ >+ // Some more zero compression for localhost addresses >+ assertEquals("::1", IPv6Utils.canonize("0:0:0:0:0:0:0:1")); >+ assertEquals("::1", IPv6Utils.canonize("0000:0:0:0:0:0:0:0001")); >+ assertEquals("::1", IPv6Utils.canonize("00:00:0:0:00:00:0:01")); >+ assertEquals("::1", IPv6Utils.canonize("::0001")); >+ assertEquals("::1", IPv6Utils.canonize("::1")); >+ >+ // IPv6 unspecified address >+ assertEquals("::", IPv6Utils.canonize("0:0:0:0:0:0:0:0")); >+ assertEquals("::", IPv6Utils.canonize("0000:0:0:0:0:0:0:0000")); >+ assertEquals("::", IPv6Utils.canonize("00:00:0:0:00:00:0:00")); >+ assertEquals("::", IPv6Utils.canonize("::0000")); >+ assertEquals("::", IPv6Utils.canonize("::0")); >+ assertEquals("::", IPv6Utils.canonize("::")); >+ >+ // Leading zeros (4.1) >+ assertEquals("2001:db8::1", IPv6Utils.canonize("2001:0db8::0001")); >+ >+ // Shorten as much as possible (4.2.1) >+ assertEquals("2001:db8::2:1", IPv6Utils.canonize("2001:db8:0:0:0:0:2:1")); >+ assertEquals("2001:db8::", IPv6Utils.canonize("2001:db8:0:0:0:0:0:0")); >+ >+ // Handling One 16-Bit 0 Field (4.2.2) >+ assertEquals("2001:db8:0:1:1:1:1:1", IPv6Utils.canonize("2001:db8:0:1:1:1:1:1")); >+ assertEquals("2001:db8:0:1:1:1:1:1", IPv6Utils.canonize("2001:db8::1:1:1:1:1")); >+ >+ // Choice in Placement of "::" (4.2.3) >+ assertEquals("2001:0:0:1::1", IPv6Utils.canonize("2001:0:0:1:0:0:0:1")); >+ assertEquals("2001:db8::1:0:0:1", IPv6Utils.canonize("2001:db8:0:0:1:0:0:1")); >+ >+ // IPv4 inside IPv6 >+ assertEquals("::ffff:192.0.2.1", IPv6Utils.canonize("::ffff:192.0.2.1")); >+ assertEquals("::ffff:192.0.2.1", IPv6Utils.canonize("0:0:0:0:0:ffff:192.0.2.1")); >+ assertEquals("::192.0.2.1", IPv6Utils.canonize("::192.0.2.1")); >+ assertEquals("::192.0.2.1", IPv6Utils.canonize("0:0:0:0:0:0:192.0.2.1")); >+ >+ // Zone ID >+ assertEquals("fe80::f0f0:c0c0:1919:1234%4", IPv6Utils.canonize("fe80::f0f0:c0c0:1919:1234%4")); >+ assertEquals("fe80::f0f0:c0c0:1919:1234%4", IPv6Utils.canonize("fe80:0:0:0:f0f0:c0c0:1919:1234%4")); >+ >+ assertEquals("::%4", IPv6Utils.canonize("::%4")); >+ assertEquals("::%4", IPv6Utils.canonize("::0%4")); >+ assertEquals("::%4", IPv6Utils.canonize("0:0::0%4")); >+ assertEquals("::%4", IPv6Utils.canonize("0:0:0:0:0:0:0:0%4")); >+ >+ assertEquals("::1%4", IPv6Utils.canonize("::1%4")); >+ assertEquals("::1%4", IPv6Utils.canonize("0:0::1%4")); >+ assertEquals("::1%4", IPv6Utils.canonize("0:0:0:0:0:0:0:1%4")); >+ >+ assertEquals("::1%eth0", IPv6Utils.canonize("::1%eth0")); >+ assertEquals("::1%eth0", IPv6Utils.canonize("0:0::1%eth0")); >+ assertEquals("::1%eth0", IPv6Utils.canonize("0:0:0:0:0:0:0:1%eth0")); >+ >+ // Hostname safety >+ assertEquals("www.apache.org", IPv6Utils.canonize("www.apache.org")); >+ assertEquals("ipv6.google.com", IPv6Utils.canonize("ipv6.google.com")); >+ >+ } >+} >\ No newline at end of file >Index: webapps/docs/config/valve.xml >=================================================================== >--- webapps/docs/config/valve.xml (revision 1442555) >+++ webapps/docs/config/valve.xml (working copy) >@@ -236,6 +236,16 @@ > </p> > </attribute> > >+ <attribute name="canonical" required="false"> >+ <p>Flag to determine if IPv6 addresses should be represented in canonical >+ representation format as defined by RFC 5952. If set to <code>true</code>, >+ then IPv6 addresses will be written in canonical format (e.g. >+ <code>2001:db8::1:0:0:1</code>, <code>::1</code>), otherwise it will be >+ represented in full form (e.g. <code>2001:db8:0:0:1:0:0:1</code>, >+ <code>0:0:0:0:0:0:0:1</code>). Default value: <code>true</code> >+ </p> >+ </attribute> >+ > <attribute name="maxLogMessageBufferSize" required="false"> > <p>Log message buffers are usually recycled and re-used. To prevent > excessive memory usage, if a buffer grows beyond this size it will be View Attachment As Diff View Attachment As Raw

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