random number seed pid-tid fixup, todo.

git-svn-id: file:///svn/unbound/trunk@463 be551aaa-1e26-0410-a405-d3ace91eadb9

daemon/worker.c

@@ -651,7 +651,8 @@ worker_init(struct worker* worker, struct config_file *cfg,
 		return 0;
 	}
 	seed = (unsigned int)time(NULL) ^ (unsigned int)getpid() ^
-		(unsigned int)worker->thread_num;
+		(((unsigned int)worker->thread_num)<<17);
+		/* shift thread_num so it does not match out pid bits */
 	if(!ub_initstate(seed, worker->rndstate, RND_STATE_SIZE)) {
 		log_err("could not init random numbers.");
 		worker_delete(worker);

doc/Changelog

@@ -1,3 +1,7 @@
+30 July 2007: Wouter
+	- changed random state init, so that sequential process IDs are not
+	  cancelled out by sequential thread-ids in the random number seed.
+
 27 July 2007: Wouter
 	- removed useless -C debug option. It did not work.
 	- text edit of documentation.

doc/TODO

@@ -24,3 +24,5 @@ o check query, option to enforce presence of qdsection in noerror answers.
 o configuration option where port 53 is used for send and receive, no other
   ports are used.
 o prime sequence in multiple queries, if glue missing from prime sequence.
+o (option) to not send replies to clients after a timeout of (say 5 secs) has
+  passed, but keep task active for later retries by client.