net.adns: Handle dns.query() failures, and pass error to handler

diff --git a/net/adns.lua b/net/adns.lua
index d0151c8c31a4721b3bddfff472d17a32092b4f04..2f7b680458bf36e82de0d50ea3ba8a24f945d504 100644 (file)
--- a/net/adns.lua
+++ b/net/adns.lua
@@ -26,10 +26,17 @@ function lookup(handler, qname, qtype, qclass)
                                        return;
                                end
                                log("debug", "Records for %s not in cache, sending query (%s)...", qname, tostring(coroutine.running()));
-                               dns.query(qname, qtype, qclass);
-                               coroutine.yield({ qclass or "IN", qtype or "A", qname, coroutine.running()}); -- Wait for reply
-                               log("debug", "Reply for %s (%s)", qname, tostring(coroutine.running()));
-                               local ok, err = pcall(handler, dns.peek(qname, qtype, qclass));
+                               local ok, err = dns.query(qname, qtype, qclass);
+                               if ok then
+                                       coroutine.yield({ qclass or "IN", qtype or "A", qname, coroutine.running()}); -- Wait for reply
+                                       log("debug", "Reply for %s (%s)", qname, tostring(coroutine.running()));
+                               end
+                               if ok then
+                                       ok, err = pcall(handler, dns.peek(qname, qtype, qclass));
+                               else
+                                       log("error", "Error sending DNS query: %s", err);
+                                       ok, err = pcall(handler, nil, err);
+                               end
                                if not ok then
                                        log("error", "Error in DNS response handler: %s", tostring(err));
                                end