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(parent: 432f645) | patch
Fail queries fast if no DNS servers are configured.
authorLorenzo Colitti <lorenzo@google.com>
Fri, 28 Nov 2014 11:03:23 +0000 (20:03 +0900)
committerLorenzo Colitti <lorenzo@google.com>
Mon, 1 Dec 2014 20:03:25 +0000 (20:03 +0000)
commite5477f83b0a639b86d8cbe710f25d9808a8f72af
tree5928315c3044dd857e1c30c435135d5bb6d3309btree | snapshot
parent432f645887466ed7099addb20fa8915c8a29fcabcommit | diff
Fail queries fast if no DNS servers are configured.

When no DNS servers are configured (and thus there is no chance
that the DNS query will suceed), res_nsend returns early, but
it does not tell the cache that the query has failed.
Therefore, if the caller retries the query, it will block for
PENDING_REQUEST_TIMEOUT (= 20 seconds) waiting for the "existing
query" (which isn't actually doing anything) to complete.

Bug: 18240188
Bug: 18327075
Change-Id: I0df13ff4a17ee65e640be96695a3af31b020963a
libc/dns/resolv/res_send.c diff | blob | history
bionic
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