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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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87
src/lease.c
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@@ -340,20 +340,103 @@ void lease_update_file(time_t now)
alarm((unsigned)difftime(next_event, now));
}
void lease_update_dns(void)
static int find_interface_v4(struct in_addr local, int if_index,
struct in_addr netmask, struct in_addr broadcast, void *vparam)
{
struct dhcp_lease *lease;
(void) broadcast;
(void) vparam;
for (lease = leases; lease; lease = lease->next)
if (!(lease->flags & (LEASE_TA | LEASE_NA)))
if (is_same_net(local, lease->addr, netmask))
lease->last_interface = if_index;
return 1;
}
#ifdef HAVE_DHCP6
static int find_interface_v6(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
{
struct dhcp_lease *lease;
(void) scope;
(void) vparam;
(void)dad;
for (lease = leases; lease; lease = lease->next)
if ((lease->flags & (LEASE_TA | LEASE_NA)))
if (is_same_net6(local, (struct in6_addr *)&lease->hwaddr, prefix))
lease->last_interface = if_index;
return 1;
}
#endif
/* Find interfaces associated with leases at start-up. This gets updated as
we do DHCP transactions, but information about directly-connected subnets
is useful from scrips and necessary for determining SLAAC addresses from
start-time. */
void lease_find_interfaces(void)
{
iface_enumerate(AF_INET, NULL, find_interface_v4);
#ifdef HAVE_DHCP6
iface_enumerate(AF_INET6, NULL, find_interface_v6);
#endif
}
void lease_update_dns(void)
{
struct dhcp_lease *lease;
if (daemon->port != 0 && dns_dirty)
{
cache_unhash_dhcp();
#ifdef HAVE_DHCP6
struct subnet_map *subnets = build_subnet_map();
#endif
cache_unhash_dhcp();
for (lease = leases; lease; lease = lease->next)
{
int prot = AF_INET;
#ifdef HAVE_DHCP6
if (lease->flags & (LEASE_TA | LEASE_NA))
prot = AF_INET6;
else
{
struct subnet_map *map;
for (map = subnets; map; map = map->next)
if (lease->last_interface == map->iface)
{
struct in6_addr addr = map->subnet;
if (lease->hwaddr_len == 6)
{
/* convert MAC address to EUI-64 */
memcpy(&addr.s6_addr[8], lease->hwaddr, 3);
memcpy(&addr.s6_addr[13], &lease->hwaddr[3], 3);
addr.s6_addr[11] = 0xff;
addr.s6_addr[12] = 0xfe;
addr.s6_addr[8] ^= 0x02;
}
else if (lease->hwaddr_len == 8)
memcpy(&addr.s6_addr[8], lease->hwaddr, 8);
else
continue;
if (lease->fqdn)
cache_add_dhcp_entry(lease->fqdn, AF_INET6, (struct all_addr *)&addr, lease->expires);
if (!option_bool(OPT_DHCP_FQDN) && lease->hostname)
cache_add_dhcp_entry(lease->hostname, AF_INET6, (struct all_addr *)&addr, lease->expires);
}
}
#endif
if (lease->fqdn)