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BuildHandler: Enforce request record timestamp

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BuildRequestor: Randomize timestamp to prevent hop ID at top of hour
This commit is contained in:
zzz
2014-09-04 01:08:23 +00:00
parent 5af749a226
commit 09cf973712
2 changed files with 31 additions and 8 deletions
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6
router/java/src/net/i2p/data/i2np/BuildRequestRecord.java
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@@ -146,10 +146,10 @@ public class BuildRequestRecord {
return (_data.getData()[_data.getOffset() + OFF_FLAG] & FLAG_OUTBOUND_ENDPOINT) != 0;
}
/**
* Time that the request was sent, truncated to the nearest hour
* Time that the request was sent (ms), truncated to the nearest hour
*/
public long readRequestTime() {
return DataHelper.fromLong(_data.getData(), _data.getOffset() + OFF_REQ_TIME, 4) * 60l * 60l * 1000l;
return DataHelper.fromLong(_data.getData(), _data.getOffset() + OFF_REQ_TIME, 4) * (60 * 60 * 1000L);
}
/**
* What message ID should we send the request to the next hop with. If this is the outbound tunnel endpoint,
@@ -250,6 +250,8 @@ public class BuildRequestRecord {
else if (isOutEndpoint)
buf[OFF_FLAG] |= FLAG_OUTBOUND_ENDPOINT;
long truncatedHour = ctx.clock().now();
// prevent hop identification at top of the hour
truncatedHour -= ctx.random().nextInt(90*1000);
truncatedHour /= (60l*60l*1000l);
DataHelper.toLong(buf, OFF_REQ_TIME, 4, truncatedHour);
DataHelper.toLong(buf, OFF_SEND_MSG_ID, 4, nextMsgId);