X-Git-Url: http://git.archive.openwrt.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fdhcpv4.c;h=d978da8c7fa003416e951efdb65b68c2390e684c;hb=aa5659eb06a386ddf2bc80ad078891820f12c410;hp=7b200cded2b5e70725a8427c0c51b71abd98fa5a;hpb=de90ff1b27ef8e41c819d40d80f0fd6d8be86ded;p=project%2Fodhcpd.git

diff --git a/src/dhcpv4.c b/src/dhcpv4.c
index 7b200cd..d978da8 100644
--- a/src/dhcpv4.c
+++ b/src/dhcpv4.c
@@ -334,7 +334,16 @@ static void handle_dhcpv4(void *addr, void *data, size_t len,
 	} else if (reqmsg == DHCPV4_MSG_REQUEST && reqaddr.s_addr &&
 			reqaddr.s_addr != htonl(lease->addr)) {
 		msg = DHCPV4_MSG_NAK;
-		lease = NULL;
+		/*
+		 * DHCP client requested an IP which we can't offer to him. Probably the
+		 * client changed the network. The reply type is set to DHCPV4_MSG_NAK,
+		 * because the client should not use that IP.
+		 *
+		 * For modern devices we build an answer that includes a valid IP, like
+		 * a DHCPV4_MSG_ACK. The client will use that IP and doesn't need to
+		 * perform additional DHCP round trips.
+		 *
+		 */
 	}
 
 	if (reqmsg == DHCPV4_MSG_DECLINE || reqmsg == DHCPV4_MSG_RELEASE)