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Fix sending ARP request for IP broadcasts

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Sergio R. Caprile committed 2022-11-25 17:42:35 -03:00
1 parent a74d3737dc
commit 9625c49c95
2 files changed
+15 -5
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mongoose.c
+6 -1
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@@ -6759,9 +6759,14 @@ static inline void arp_cache_dump(const uint8_t *p) {
}
#endif
static const uint8_t bcastmac[6] = {0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
static uint8_t *arp_cache_find(struct mip_if *ifp, uint32_t ip) {
uint8_t *p = ifp->arp_cache;
if (ip == 0 || ip == 0xffffffffU) return NULL;
if (ip == 0) return NULL;
// use broadcast MAC for local and global broadcast IP
if (ip == 0xffffffffU || ip == (ifp->ip | ~ifp->mask))
return (uint8_t *) bcastmac;
for (uint8_t i = 0, j = p[1]; i < MIP_ARP_ENTRIES; i++, j = p[j + 1]) {
if (memcmp(p + j + 2, &ip, sizeof(ip)) == 0) {
p[1] = j, p[0] = p[j]; // Found entry! Point list head to us