1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
From db0f488ea8f5ded7c57400c9108ec3c9367d75c5 Mon Sep 17 00:00:00 2001
From: Simon Kelley <simon@thekelleys.org.uk>
Date: Thu, 7 Jun 2018 21:37:02 +0100
Subject: [PATCH 15/17] Handle some corner cases in RA contructed interfaces
with addresses changing interface.
Thanks to Vladislav Grishenko for work on this.
Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
---
src/dhcp6.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
--- a/src/dhcp6.c
+++ b/src/dhcp6.c
@@ -640,7 +640,7 @@ static int construct_worker(struct in6_a
return 0;
for (template = daemon->dhcp6; template; template = template->next)
- if (!(template->flags & CONTEXT_TEMPLATE))
+ if (!(template->flags & (CONTEXT_TEMPLATE | CONTEXT_CONSTRUCTED)))
{
/* non-template entries, just fill in interface and local addresses */
if (prefix <= template->prefix &&
@@ -667,20 +667,23 @@ 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_TEMPLATE) &&
IN6_ARE_ADDR_EQUAL(&start6, &context->start6) &&
IN6_ARE_ADDR_EQUAL(&end6, &context->end6))
{
- if (context->flags & CONTEXT_CONSTRUCTED)
+ /* If there's an absolute address context covering this address
+ then don't construct one as well. */
+ if (!(context->flags & CONTEXT_CONSTRUCTED))
+ break;
+
+ if (context->if_index == if_index)
{
int cflags = context->flags;
context->flags &= ~(CONTEXT_GC | CONTEXT_OLD);
if (cflags & CONTEXT_OLD)
{
- /* address went, now it's back */
+ /* address went, now it's back, and on the same interface */
log_context(AF_INET6, context);
/* fast RAs for a while */
ra_start_unsolicited(param->now, context);
@@ -688,9 +691,10 @@ static int construct_worker(struct in6_a
/* Add address to name again */
if (context->flags & CONTEXT_RA_NAME)
param->newname = 1;
+
+ break;
}
}
- break;
}
if (!context && (context = whine_malloc(sizeof (struct dhcp_context))))
|
