dhcpv4: send NAK to broacast address

diff --git a/src/dhcpv4.c b/src/dhcpv4.c
index 5883847..ebddb22 100644 (file)
--- a/src/dhcpv4.c
+++ b/src/dhcpv4.c
@@ -458,6 +458,13 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
                 */
                dest.sin_addr.s_addr = INADDR_BROADCAST;
                dest.sin_port = htons(DHCPV4_CLIENT_PORT);
+       } else if (!req->ciaddr.s_addr && msg == DHCPV4_MSG_NAK) {
+               /*
+                * client has no previous configuration -> no IP, so we need to reply
+                * with a broadcast packet
+                */
+               dest.sin_addr.s_addr = INADDR_BROADCAST;
+               dest.sin_port = htons(DHCPV4_CLIENT_PORT);
        } else {
                /*
                 * send reply to the newly (in this proccess) allocated IP