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Add ra-names SLAAC-hostnames from DHCPv4 option.

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This commit is contained in:
Simon Kelley
2012-03-06 19:30:17 +00:00
parent df66e341de
commit 801ca9a7b7
5 changed files with 190 additions and 10 deletions
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65
src/radv.c
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@@ -426,4 +426,69 @@ static int iface_search(struct in6_addr *local, int prefix,
return 1; /* keep searching */
}
static int add_subnet(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
{
struct dhcp_context *context;
struct subnet_map **subnets = vparam;
struct subnet_map *map;
(void)scope;
(void)dad;
for (context = daemon->ra_contexts; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME) &&
prefix == context->prefix &&
is_same_net6(local, &context->start6, prefix) &&
is_same_net6(local, &context->end6, prefix))
{
for (map = *subnets; map; map = map->next)
if (map->iface == 0)
break;
else if (map->iface == if_index && is_same_net6(local, &map->subnet, prefix))
continue;
if (!map && (map = whine_malloc(sizeof(struct subnet_map))))
{
map->next = *subnets;
*subnets = map;
}
if (map)
{
map->iface = if_index;
map->subnet = *local;
}
}
return 1;
}
/* Build a map from ra-names subnets to corresponding interfaces. This
is used to go from DHCPv4 leases to SLAAC addresses,
interface->IPv6-subnet, IPv6-subnet + MAC address -> SLAAC.
*/
struct subnet_map *build_subnet_map(void)
{
struct subnet_map *map;
struct dhcp_context *context;
static struct subnet_map *subnets = NULL;
for (context = daemon->ra_contexts; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME))
break;
if (!context)
return NULL;
/* mark unused */
for (map = subnets; map; map = map->next)
map->iface = 0;
if (iface_enumerate(AF_INET6, &subnets, add_subnet))
return subnets;
return NULL;
}
#endif