From 8c85b44f6ab42561207365f19b9d1fd69d960771 Mon Sep 17 00:00:00 2001 From: Tim Hockin Date: Wed, 9 Mar 2016 22:12:23 +0100 Subject: DNS: Don't apply search domains to PTR lookups This lessens the load on upstream DNS servers (and it was just nonsensical). Signed-off-by: Tim Hockin --- libc/inet/resolv.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index e676f5371..f378c9b9d 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -1264,7 +1264,7 @@ int __dns_lookup(const char *name, int variant = -1; /* search domain to append, -1: none */ int local_ns_num = -1; /* Nth server to use */ int local_id = local_id; /* for compiler */ - int sdomains; + int sdomains = 0; bool ends_with_dot; sockaddr46_t sa; @@ -1302,7 +1302,9 @@ int __dns_lookup(const char *name, * or do other Really Bad Things. */ __UCLIBC_MUTEX_LOCK(__resolv_lock); __open_nameservers(); - sdomains = __searchdomains; + if (type != T_PTR) { + sdomains = __searchdomains; + } lookup[name_len] = '\0'; if ((unsigned)variant < sdomains) { /* lookup is name_len + 1 + MAXLEN_searchdomain + 1 long */ -- cgit v1.2.3