arping: avoid use of ether_ntoa(). Closes 8926

This is the only non-debug use of ether_ntoa(). By not using it,
we reduce bss:

function                                             old     new   delta
arping_main                                         1568    1665     +97
static.asc                                            18       -     -18
ether_ntoa                                            57       -     -57
------------------------------------------------------------------------------
(add/remove: 0/2 grow/shrink: 1/0 up/down: 97/-75)             Total: 22 bytes
   text    data     bss     dec     hex filename
 911020     493    7352  918865   e0551 busybox_old
 911069     493    7336  918898   e0572 busybox_unstripped

Also, "standard" arping zero-pads MAC. ether_ntoa() does not.

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

1 files changed, 7 insertions, 4 deletions

diff --git a/networking/arping.c b/networking/arping.c
index 6b0de4de2..4f207eaa5 100644
--- a/networking/arping.c
+++ b/networking/arping.c
@@ -231,20 +231,23 @@ static void recv_pack(unsigned char *buf, int len, struct sockaddr_ll *FROM)
         if (!(option_mask32 & QUIET)) {
                 int s_printed = 0;
 
-                printf("%scast re%s from %s [%s]",
+                printf("%scast re%s from %s [%02x:%02x:%02x:%02x:%02x:%02x]",
                         FROM->sll_pkttype == PACKET_HOST ? "Uni" : "Broad",
                         ah->ar_op == htons(ARPOP_REPLY) ? "ply" : "quest",
                         inet_ntoa(src_ip),
-                        ether_ntoa((struct ether_addr *) p));
+                        p[0], p[1], p[2], p[3], p[4], p[5]
+                );
                 if (dst_ip.s_addr != src.s_addr) {
                         printf("for %s ", inet_ntoa(dst_ip));
                         s_printed = 1;
                 }
                 if (memcmp(p + ah->ar_hln + 4, me.sll_addr, ah->ar_hln)) {
+                        unsigned char *pp = p + ah->ar_hln + 4;
                         if (!s_printed)
                                 printf("for ");
-                        printf("[%s]",
-                                ether_ntoa((struct ether_addr *) p + ah->ar_hln + 4));
+                        printf("[%02x:%02x:%02x:%02x:%02x:%02x]",
+                                pp[0], pp[1], pp[2], pp[3], pp[4], pp[5]
+                        );
                 }
 
                 if (last) {