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author | Daniel Stenberg <daniel@haxx.se> | 2008-07-03 11:32:35 +0000 |
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committer | Daniel Stenberg <daniel@haxx.se> | 2008-07-03 11:32:35 +0000 |
commit | 93e7573628f717a9615d94b9ef76f6365b664eef (patch) | |
tree | d9e6eaa5fde2500eb586c8d02b0310260f11c119 /ares_gethostbyname.c | |
parent | daa25aa705a34db5e5b5a2c3c527160c41b95fc2 (diff) | |
download | c-ares-93e7573628f717a9615d94b9ef76f6365b664eef.tar.gz c-ares-93e7573628f717a9615d94b9ef76f6365b664eef.tar.bz2 c-ares-93e7573628f717a9615d94b9ef76f6365b664eef.zip |
- Phil Blundell: If you ask ares_gethostbyname() to do an AF_INET6 lookup and
the target host has only A records, it automatically falls back to an
AF_INET lookup and gives you the A results. However, if the target host has
a CNAME record, this behaviour is defeated since the original query does
return some data even though ares_parse_aaa_reply() doesn't consider it
relevant. Here's a small patch to make it behave the same with and without
the CNAME.
Diffstat (limited to 'ares_gethostbyname.c')
-rw-r--r-- | ares_gethostbyname.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/ares_gethostbyname.c b/ares_gethostbyname.c index d737b41..1e7e158 100644 --- a/ares_gethostbyname.c +++ b/ares_gethostbyname.c @@ -176,6 +176,15 @@ static void host_callback(void *arg, int status, int timeouts, else if (hquery->family == AF_INET6) { status = ares_parse_aaaa_reply(abuf, alen, &host, NULL, NULL); + if (status == ARES_ENODATA) + { + /* The query returned something (e.g. CNAME) but there were no + AAAA records. Try looking up A instead. */ + hquery->family = AF_INET; + ares_search(hquery->channel, hquery->name, C_IN, T_A, host_callback, + hquery); + return; + } if (host && channel->nsort) sort6_addresses(host, channel->sortlist, channel->nsort); } |