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@ -39,6 +39,8 @@ import java.util.List;
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import java.util.Locale;
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import java.util.Locale;
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import java.util.Map;
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import java.util.Map;
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import javax.mail.Address;
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import javax.mail.internet.InternetAddress;
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import javax.mail.internet.MimeUtility;
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import javax.mail.internet.MimeUtility;
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public class DnsBlockList {
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public class DnsBlockList {
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@ -55,7 +57,7 @@ public class DnsBlockList {
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}),
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}),
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// https://www.spamhaus.org/dbl/
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// https://www.spamhaus.org/dbl/
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new BlockList(null, "Spamhaus/DBL", "dbl.spamhaus.org", false, new String[]{
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new BlockList(true, "Spamhaus/DBL", "dbl.spamhaus.org", false, new String[]{
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// https://www.spamhaus.org/faq/section/Spamhaus%20DBL#291
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// https://www.spamhaus.org/faq/section/Spamhaus%20DBL#291
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"127.0.1.2", // spam domain
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"127.0.1.2", // spam domain
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"127.0.1.4", // phish domain
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"127.0.1.4", // phish domain
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@ -137,10 +139,28 @@ public class DnsBlockList {
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return null;
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return null;
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String host = getFromHost(MimeUtility.unfold(received[received.length - 1]));
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String host = getFromHost(MimeUtility.unfold(received[received.length - 1]));
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return (host == null ? null : isJunk(context, host, BLOCK_LISTS));
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if (host == null)
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return null;
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boolean numeric = host.startsWith("[") && host.endsWith("]");
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if (numeric)
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host = host.substring(1, host.length() - 1);
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return isJunk(context, host, true, BLOCK_LISTS);
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}
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}
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private static boolean isJunk(Context context, String host, List<BlockList> blocklists) {
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static Boolean isJunk(Context context, List<Address> addresses) {
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for (Address address : addresses) {
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String email = ((InternetAddress) address).getAddress();
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String domain = UriHelper.getEmailDomain(email);
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if (domain == null)
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continue;
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if (isJunk(context, domain, false, BLOCK_LISTS))
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return true;
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}
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return false;
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}
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private static boolean isJunk(Context context, String host, boolean numeric, List<BlockList> blocklists) {
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synchronized (cache) {
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synchronized (cache) {
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CacheEntry entry = cache.get(host);
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CacheEntry entry = cache.get(host);
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if (entry != null && !entry.isExpired())
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if (entry != null && !entry.isExpired())
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@ -149,7 +169,9 @@ public class DnsBlockList {
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boolean blocked = false;
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boolean blocked = false;
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for (BlockList blocklist : blocklists)
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for (BlockList blocklist : blocklists)
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if (isEnabled(context, blocklist) && isJunk(host, blocklist)) {
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if (isEnabled(context, blocklist) &&
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blocklist.numeric == numeric &&
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isJunk(host, blocklist)) {
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blocked = true;
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blocked = true;
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break;
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break;
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}
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}
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@ -162,9 +184,6 @@ public class DnsBlockList {
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}
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}
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private static boolean isJunk(String host, BlockList blocklist) {
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private static boolean isJunk(String host, BlockList blocklist) {
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boolean numeric = host.startsWith("[") && host.endsWith("]");
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if (numeric)
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host = host.substring(1, host.length() - 1);
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try {
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try {
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if (blocklist.numeric) {
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if (blocklist.numeric) {
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long start = new Date().getTime();
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long start = new Date().getTime();
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@ -202,7 +221,7 @@ public class DnsBlockList {
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Log.w(ex);
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Log.w(ex);
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}
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}
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}
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}
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} else if (!numeric) {
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} else {
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long start = new Date().getTime();
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long start = new Date().getTime();
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String lookup = host + "." + blocklist.address;
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String lookup = host + "." + blocklist.address;
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boolean junk = isJunk(lookup, blocklist.responses);
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boolean junk = isJunk(lookup, blocklist.responses);
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