_cleanup_free_ DHCPMessage *message = NULL;
int buflen = 0, len, r;
const struct ether_addr zero_mac = { { 0, 0, 0, 0, 0, 0 } };
- const struct ether_addr *expected_chaddr = NULL;
+ bool expect_chaddr;
uint8_t expected_hlen = 0;
assert(s);
if (client->arp_type == ARPHRD_ETHER) {
expected_hlen = ETH_ALEN;
- expected_chaddr = (const struct ether_addr *) &client->mac_addr;
+ expect_chaddr = true;
} else {
/* Non-ethernet links expect zero chaddr */
expected_hlen = 0;
- expected_chaddr = &zero_mac;
+ expect_chaddr = false;
}
if (message->hlen != expected_hlen) {
return 0;
}
- if (memcmp(&message->chaddr[0], expected_chaddr, ETH_ALEN)) {
+ if (memcmp(&message->chaddr[0], expect_chaddr ?
+ (void *)&client->mac_addr :
+ (void *)&zero_mac,
+ ETH_ALEN)) {
log_dhcp_client(client, "received chaddr does not match "
"expected: ignoring");
return 0;