udhcpd: don't fail ARP check if returned MAC matches client's one

Also, do not unicast replies to yiaddr.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index 2dd3cd077..ab34b0472 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -553,9 +553,10 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv)
  * the client MUST send a DHCPDECLINE message to the server and restarts
  * the configuration process..." */
                                                 if (!arpping(packet.yiaddr,
-                                                            (uint32_t) 0,
-                                                            client_config.arp,
-                                                            client_config.interface)
+                                                                NULL,
+                                                                (uint32_t) 0,
+                                                                client_config.arp,
+                                                                client_config.interface)
                                                 ) {
                                                         bb_info_msg("offered address is in use "
                                                                 "(got ARP reply), declining");