libbb: introduce and use bb_getsockname()

function                                             old     new   delta
bb_getsockname                                         -      18     +18
xrtnl_open                                            88      83      -5
do_iplink                                           1216    1209      -7
arping_main                                         1686    1668     -18
------------------------------------------------------------------------------
(add/remove: 2/0 grow/shrink: 0/3 up/down: 18/-30)            Total: -12 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/networking/libiproute/libnetlink.c b/networking/libiproute/libnetlink.c
index f08d862d0..40955fcae 100644
--- a/networking/libiproute/libnetlink.c
+++ b/networking/libiproute/libnetlink.c
@@ -15,16 +15,13 @@
 
 void FAST_FUNC xrtnl_open(struct rtnl_handle *rth/*, unsigned subscriptions*/)
 {
-        socklen_t addr_len;
-
         memset(rth, 0, sizeof(*rth));
         rth->fd = xsocket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
         rth->local.nl_family = AF_NETLINK;
         /*rth->local.nl_groups = subscriptions;*/
 
         xbind(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local));
-        addr_len = sizeof(rth->local);
-        getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len);
+        bb_getsockname(rth->fd, (struct sockaddr*)&rth->local, sizeof(rth->local));
 
 /* too much paranoia
         if (getsockname(rth->fd, (struct sockaddr*)&rth->local, &addr_len) < 0)