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arp, dhcp: Fix strict aliasing warnings reported by gcc 4.9 with -Ofast

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Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2022-02-28 22:17:32 +01:00
parent 213c397492
commit 2fa1cef016
2 changed files with 9 additions and 8 deletions

3
arp.c
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@ -58,7 +58,8 @@ int arp(struct ctx *c, struct ethhdr *eh, size_t len)
/* Discard announcements (but not 0.0.0.0 "probes"): we might have the
* same IP address, hide that.
*/
if (*((uint32_t *)&am->sip) && !memcmp(am->sip, am->tip, 4))
if (memcmp(am->sip, (unsigned char[4]){ 0, 0, 0, 0 }, 4) &&
!memcmp(am->sip, am->tip, 4))
return 1;
/* Don't resolve our own address, either. */