dnsd: properly set _src_ IP:port on outgoing UDP packets

function                                             old     new   delta
send_to_from                                           -     258    +258
dnsd_main                                           1500    1568     +68
interrupt                                             17      19      +2
------------------------------------------------------------------------------
(add/remove: 1/0 grow/shrink: 2/0 up/down: 328/0)             Total: 328 bytes
   text    data     bss     dec     hex filename
 797101     658    7428  805187   c4943 busybox_old
 797429     658    7428  805515   c4a8b busybox_unstripped

1 files changed, 2 insertions, 3 deletions

diff --git a/libbb/udp_io.c b/libbb/udp_io.c
index 2f02a138b..e968ecb66 100644
--- a/libbb/udp_io.c
+++ b/libbb/udp_io.c
@@ -25,10 +25,10 @@ socket_want_pktinfo(int fd)
 }
 
 
-#ifdef UNUSED
 ssize_t
 send_to_from(int fd, void *buf, size_t len, int flags,
-                const struct sockaddr *from, const struct sockaddr *to,
+                const struct sockaddr *to,
+                const struct sockaddr *from,
                 socklen_t tolen)
 {
 #ifndef IP_PKTINFO
@@ -92,7 +92,6 @@ send_to_from(int fd, void *buf, size_t len, int flags,
         return sendmsg(fd, &msg, flags);
 #endif
 }
-#endif /* UNUSED */
 
 /* NB: this will never set port# in 'to'!
  * _Only_ IP/IPv6 address part of 'to' is _maybe_ modified.