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networkd: Request prefixes when configured to do so

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Request prefixes via DHCPv6 if there are networks that are
configured to distribute them. As specified in RFC 3633, a DHCPv6
client cannot redistribute the prefixes via Router Advertisements
on the same link. Ignore such networks, and print out a warning if
the link where DHCPv6 is enabled tries to do so.
This commit is contained in:
Patrik Flykt
2018-01-04 15:11:51 +02:00
parent 7c3de8f8cf
commit 103b81ee8c
1 changed files with 45 additions and 0 deletions
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45
src/network/networkd-dhcp6.c
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@@ -30,6 +30,45 @@
static int dhcp6_lease_address_acquired(sd_dhcp6_client *client, Link *link);
static bool dhcp6_verify_link(Link *link) {
if (!link->network) {
log_link_info(link, "Link is not managed by us");
return false;
}
if (!IN_SET(link->network->router_prefix_delegation,
RADV_PREFIX_DELEGATION_DHCP6,
RADV_PREFIX_DELEGATION_BOTH)) {
log_link_debug(link, "Link does not request DHCPv6 prefix delegation");
return false;
}
return true;
}
static bool dhcp6_enable_prefix_delegation(Link *dhcp6_link) {
Manager *manager;
Link *l;
Iterator i;
assert(dhcp6_link);
manager = dhcp6_link->manager;
assert(manager);
HASHMAP_FOREACH(l, manager->links, i) {
if (l == dhcp6_link)
continue;
if (!dhcp6_verify_link(l))
continue;
return true;
}
return false;
}
static int dhcp6_lease_information_acquired(sd_dhcp6_client *client,
Link *link) {
return 0;
@@ -283,6 +322,12 @@ int dhcp6_configure(Link *link) {
if (r < 0)
goto error;
if (dhcp6_enable_prefix_delegation(link)) {
r = sd_dhcp6_client_set_prefix_delegation(client, true);
if (r < 0)
goto error;
}
link->dhcp6_client = client;
return 0;