X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsone%2Fcore%2FSoneDownloader.java;h=4328f02078ec45a6d29370cf68b52288c8568421;hb=7815943b9ecc1199e11dd8be9736d6f3e892118e;hp=fa0063e4898e5dc335356da450a890239cb30d0d;hpb=6db033602e7c17efc40a4a19efe705d67832fc1a;p=Sone.git

diff --git a/src/main/java/net/pterodactylus/sone/core/SoneDownloader.java b/src/main/java/net/pterodactylus/sone/core/SoneDownloader.java
index fa0063e..4328f02 100644
--- a/src/main/java/net/pterodactylus/sone/core/SoneDownloader.java
+++ b/src/main/java/net/pterodactylus/sone/core/SoneDownloader.java
@@ -55,6 +55,9 @@ public class SoneDownloader extends AbstractService {
 	/** The logger. */
 	private static final Logger logger = Logging.getLogger(SoneDownloader.class);
 
+	/** The maximum protocol version. */
+	private static final int MAX_PROTOCOL_VERSION = 0;
+
 	/** The core. */
 	private final Core core;
 
@@ -221,6 +224,27 @@ public class SoneDownloader extends AbstractService {
 			return null;
 		}
 
+		Integer protocolVersion = null;
+		String soneProtocolVersion = soneXml.getValue("protocol-version", null);
+		if (soneProtocolVersion != null) {
+			protocolVersion = Numbers.safeParseInteger(soneProtocolVersion);
+		}
+		if (protocolVersion == null) {
+			logger.log(Level.INFO, "No protocol version found, assuming 0.");
+			protocolVersion = 0;
+		}
+
+		if (protocolVersion < 0) {
+			logger.log(Level.WARNING, "Invalid protocol version: " + protocolVersion + "! Not parsing Sone.");
+			return null;
+		}
+
+		/* check for valid versions. */
+		if (protocolVersion > MAX_PROTOCOL_VERSION) {
+			logger.log(Level.WARNING, "Unknown protocol version: " + protocolVersion + "! Not parsing Sone.");
+			return null;
+		}
+
 		String soneTime = soneXml.getValue("time", null);
 		if (soneTime == null) {
 			/* TODO - mark Sone as bad. */