Initial commit

package/network/services/dnsmasq/patches/0009-Revert-68f6312d4bae30b78daafcd6f51dc441b8685b1e.patch

@@ -0,0 +1,41 @@
+From 122392e0b352507cabb9e982208d35d2e56902e0 Mon Sep 17 00:00:00 2001
+From: Simon Kelley <simon@thekelleys.org.uk>
+Date: Wed, 31 Oct 2018 22:24:02 +0000
+Subject: [PATCH 09/32] Revert 68f6312d4bae30b78daafcd6f51dc441b8685b1e
+
+The above is intended to increase robustness, but actually does the
+opposite. The problem is that by ignoring SERVFAIL messages and hoping
+for a better answer from another of the servers we've forwarded to,
+we become vulnerable in the case that one or more of the configured
+servers is down or not responding.
+
+Consider the case that a domain is indeed BOGUS, and we've send the
+query to n servers. With 68f6312d4bae30b78daafcd6f51dc441b8685b1e
+we ignore the first n-1 SERVFAIL replies, and only return the
+final n'th answer to the client. Now, if one of the servers we are
+forwarding to is down, then we won't get all n replies, and the
+client will never get an answer! This is a far more likely scenario
+than a temporary SERVFAIL from only one of a set of notionally identical
+servers, so, on the ground of robustness, we have to believe
+any SERVFAIL answers we get, and return them to the client.
+
+The client could be using the same recursive servers we are,
+so it should, in theory, retry on SERVFAIL anyway.
+
+Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
+---
+ src/forward.c | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+--- a/src/forward.c
++++ b/src/forward.c
+@@ -957,8 +957,7 @@ void reply_query(int fd, int family, tim
+      we get a good reply from another server. Kill it when we've
+      had replies from all to avoid filling the forwarding table when
+      everything is broken */
+-  if (forward->forwardall == 0 || --forward->forwardall == 1 ||
+-      (RCODE(header) != REFUSED && RCODE(header) != SERVFAIL))
++  if (forward->forwardall == 0 || --forward->forwardall == 1 || RCODE(header) != REFUSED)
+     {
+       int check_rebind = 0, no_cache_dnssec = 0, cache_secure = 0, bogusanswer = 0;
+