udhcpd: optional IP selection based on MAC hash

function                                             old     new   delta
find_free_or_expired_nip                             153     225     +72

Signed-off-by: Vladislav Grishenko <themiron@mail.ru>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 16 insertions, 2 deletions

diff --git a/networking/udhcp/Config.src b/networking/udhcp/Config.src
index dcd493f13..750a53a32 100644
--- a/networking/udhcp/Config.src
+++ b/networking/udhcp/Config.src
@@ -39,7 +39,21 @@ config FEATURE_UDHCPD_WRITE_LEASES_EARLY
           If selected, udhcpd will write a new file with leases every
           time a new lease has been accepted, thus eliminating the need
           to send SIGUSR1 for the initial writing or updating. Any timed
-          rewriting remains undisturbed
+          rewriting remains undisturbed.
+
+config FEATURE_UDHCPD_BASE_IP_ON_MAC
+        bool "Select IP address based on client MAC"
+        default n
+        depends on UDHCPD
+        help
+          If selected, udhcpd will base its selection of IP address to offer
+          on the client's hardware address. Otherwise udhcpd uses the next
+          consecutive free address.
+
+          This reduces the frequency of IP address changes for clients
+          which let their lease expire, and makes consecutive DHCPOFFERS
+          for the same client to (almost always) contain the same
+          IP address.
 
 config DHCPD_LEASES_FILE
         string "Absolute path to lease file"
@@ -72,7 +86,7 @@ config FEATURE_UDHCPC_ARPING
 
 config FEATURE_UDHCP_PORT
         bool "Enable '-P port' option for udhcpd and udhcpc"
-        default y
+        default n
         depends on UDHCPD || UDHCPC
         help
           At the cost of ~300 bytes, enables -P port option.