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From c488b68e75ee5304007eef37203c4fc10193d191 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Sat, 2 Jun 2018 13:06:00 +0100
Subject: [PATCH 11/17] Handle standard and contructed dhcp-ranges on the same
interface.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
CHANGELOG | 6 ++++++
src/dhcp6.c | 29 +++++++++++++++++------------
2 files changed, 23 insertions(+), 12 deletions(-)
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -23,6 +23,12 @@ version 2.80
which packets should be dumped is given by the --dumpmask
option.
+ Handle the case of both standard and constructed dhcp-ranges on the
+ same interface better. We don't now contruct a dhcp-range if there's
+ already one specified. This allows the specified interface to
+ have different parameters and avoids advertising the same
+ prefix twice. Thanks to Luis Marsano for spotting this case.
+
version 2.79
Fix parsing of CNAME arguments, which are confused by extra spaces.
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -667,23 +667,28 @@ static int construct_worker(struct in6_a
end6 = *local;
setaddr6part(&end6, addr6part(&template->end6));
+ /* If there's an absolute address context covering this address
+ then don't contruct one as well. */
for (context = daemon->dhcp6; context; context = context->next)
- if ((context->flags & CONTEXT_CONSTRUCTED) &&
+ if (!(context->flags & CONTEXT_TEMPLATE) &&
IN6_ARE_ADDR_EQUAL(&start6, &context->start6) &&
IN6_ARE_ADDR_EQUAL(&end6, &context->end6))
{
- int flags = context->flags;
- context->flags &= ~(CONTEXT_GC | CONTEXT_OLD);
- if (flags & CONTEXT_OLD)
+ if (context->flags & CONTEXT_CONSTRUCTED)
{
- /* address went, now it's back */
- log_context(AF_INET6, context);
- /* fast RAs for a while */
- ra_start_unsolicited(param->now, context);
- param->newone = 1;
- /* Add address to name again */
- if (context->flags & CONTEXT_RA_NAME)
- param->newname = 1;
+ int cflags = context->flags;
+ context->flags &= ~(CONTEXT_GC | CONTEXT_OLD);
+ if (cflags & CONTEXT_OLD)
+ {
+ /* address went, now it's back */
+ log_context(AF_INET6, context);
+ /* fast RAs for a while */
+ ra_start_unsolicited(param->now, context);
+ param->newone = 1;
+ /* Add address to name again */
+ if (context->flags & CONTEXT_RA_NAME)
+ param->newname = 1;
+ }
}
break;
}
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