mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
58 lines
2.1 KiB
Diff
58 lines
2.1 KiB
Diff
|
From e7bfd556c079c8b5e7425aed44abc35925b24043 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Simon Kelley <simon@thekelleys.org.uk>
|
||
|
|
Date: Mon, 31 Dec 2018 20:51:15 +0000
|
||
|
|
Subject: [PATCH 17/30] Alter DHCP address selection after DECLINE in
|
||
|
|
consec-addr mode. Avoid offering the same address after a recieving a DECLINE
|
||
|
|
message to stop an infinite protocol loop. This has long been done in default
|
||
|
|
address allocation mode: this adds similar behaviour when allocaing addresses
|
||
|
|
consecutively.
|
||
|
|
|
||
|
|
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
|
||
|
|
---
|
||
|
|
src/dhcp.c | 13 +++++++++++++
|
||
|
|
src/dhcp6.c | 11 +++++++++--
|
||
|
|
2 files changed, 22 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
--- a/src/dhcp.c
|
||
|
|
+++ b/src/dhcp.c
|
||
|
|
@@ -754,6 +754,19 @@ int address_allocate(struct dhcp_context
|
||
|
|
if (addr.s_addr == d->router.s_addr)
|
||
|
|
break;
|
||
|
|
|
||
|
|
+ /* in consec-ip mode, skip addresses equal to
|
||
|
|
+ the number of addresses rejected by clients. This
|
||
|
|
+ should avoid the same client being offered the same
|
||
|
|
+ address after it has rjected it. */
|
||
|
|
+ if (option_bool(OPT_CONSEC_ADDR))
|
||
|
|
+ {
|
||
|
|
+ if (c->addr_epoch)
|
||
|
|
+ {
|
||
|
|
+ c->addr_epoch--;
|
||
|
|
+ d = context; /* d non-NULL skips the address. */
|
||
|
|
+ }
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
/* Addresses which end in .255 and .0 are broken in Windows even when using
|
||
|
|
supernetting. ie dhcp-range=192.168.0.1,192.168.1.254,255,255,254.0
|
||
|
|
then 192.168.0.255 is a valid IP address, but not for Windows as it's
|
||
|
|
--- a/src/dhcp6.c
|
||
|
|
+++ b/src/dhcp6.c
|
||
|
|
@@ -431,8 +431,15 @@ struct dhcp_context *address6_allocate(s
|
||
|
|
else
|
||
|
|
{
|
||
|
|
if (!temp_addr && option_bool(OPT_CONSEC_ADDR))
|
||
|
|
- /* seed is largest extant lease addr in this context */
|
||
|
|
- start = lease_find_max_addr6(c) + serial;
|
||
|
|
+ {
|
||
|
|
+ /* seed is largest extant lease addr in this context,
|
||
|
|
+ skip addresses equal to the number of addresses rejected
|
||
|
|
+ by clients. This should avoid the same client being offered the same
|
||
|
|
+ address after it has rjected it. */
|
||
|
|
+ start = lease_find_max_addr6(c) + serial + c->addr_epoch;
|
||
|
|
+ if (c->addr_epoch)
|
||
|
|
+ c->addr_epoch--;
|
||
|
|
+ }
|
||
|
|
else
|
||
|
|
{
|
||
|
|
u64 range = 1 + addr6part(&c->end6) - addr6part(&c->start6);
|