if (len & 0x01) {
odd = buf;
- sum += odd[len];
+ sum += odd[len - 1];
}
- return ~((sum & 0xffff) + (sum >> 16));
+ while (sum >> 16)
+ sum = (sum & 0xffff) + (sum >> 16);
+
+ return ~sum;
}
static void client_append_ip_headers(DHCPPacket *packet, uint16_t len)
len = len - DHCP_IP_UDP_SIZE;
r = dhcp_option_parse(&offer->dhcp, len, client_parse_offer, lease);
- if (r != DHCP_ACK)
+ if (r == DHCP_NAK) {
+ r = DHCP_EVENT_NO_LEASE;
+ goto error;
+ }
+
+ if (r != DHCP_ACK) {
+ r = -ENOMSG;
goto error;
+ }
lease->address = offer->dhcp.yiaddr;