From 777aef50973bc3a20db8d9545494e8abb86a692e Mon Sep 17 00:00:00 2001
From: Alexander Komyagin <komyagin@altell.ru>
Date: Wed, 4 Apr 2012 12:58:37 +0400
Subject: getaddrinfo(): avoid call to __check_pf() when not needed
__check_pf() function is called from getaddrinfo() and it calls
getifaddrs(), which is too much overhead especially if RSBAC-Net
is enabled. So with this patch __check_pf() is being called only
when AI_ADDRCONFIG hint flag is specified - just when we really
need that check.
Signed-off-by: Alexander Komyagin <komyagin@altell.ru>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
---
libc/inet/getaddrinfo.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
(limited to 'libc/inet')
diff --git a/libc/inet/getaddrinfo.c b/libc/inet/getaddrinfo.c
index fe0d942d9..88bd745a9 100644
--- a/libc/inet/getaddrinfo.c
+++ b/libc/inet/getaddrinfo.c
@@ -401,7 +401,13 @@ gaih_inet(const char *name, const struct gaih_service *service,
int rc;
int v4mapped = (req->ai_family == PF_UNSPEC || req->ai_family == PF_INET6)
&& (req->ai_flags & AI_V4MAPPED);
- unsigned seen = __check_pf();
+ unsigned seen = 0;
+ if (req->ai_flags & AI_ADDRCONFIG) {
+ /* "seen" is only used when AI_ADDRCONFIG is specified.
+ Avoid unnecessary call to __check_pf() otherwise
+ since it can be costly especially when RSBAC-Net is enabled. */
+ seen = __check_pf();
+ }
memset(&nullserv, 0, sizeof(nullserv));
--
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