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arping: avoid use of ether_ntoa(). Closes 8926

Browse Source 
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>
This commit is contained in:
Denys Vlasenko 2016-05-26 21:35:46 +02:00
parent f2559e5c2b
commit 852e8dd734
1 changed files with 7 additions and 4 deletions
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11
networking/arping.c
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@ -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) {