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network: move ipv6ll related functions to networkd-ipv6ll.[ch]

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This commit is contained in:
Yu Watanabe
2022-02-09 02:14:40 +09:00
parent 5573ed2230
commit de2f372ea2
8 changed files with 122 additions and 86 deletions
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src/network/networkd-link.c
-61
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@@ -105,67 +105,6 @@ bool link_ipv4ll_enabled(Link *link) {
return link->network->link_local & ADDRESS_FAMILY_IPV4;
}
bool link_ipv6ll_enabled(Link *link) {
assert(link);
if (!socket_ipv6_is_supported())
return false;
if (link->flags & IFF_LOOPBACK)
return false;
if (!link->network)
return false;
if (link->iftype == ARPHRD_CAN)
return false;
if (STRPTR_IN_SET(link->kind, "vrf", "wireguard", "ipip", "gre", "sit", "vti", "nlmon"))
return false;
if (link->network->bond)
return false;
return link->network->link_local & ADDRESS_FAMILY_IPV6;
}
bool link_may_have_ipv6ll(Link *link) {
assert(link);
/*
* This is equivalent to link_ipv6ll_enabled() for non-WireGuard interfaces.
*
* For WireGuard interface, the kernel does not assign any IPv6LL addresses, but we can assign
* it manually. It is necessary to set an IPv6LL address manually to run NDisc or RADV on
* WireGuard interface. Note, also Multicast=yes must be set. See #17380.
*
* TODO: May be better to introduce GenerateIPv6LinkLocalAddress= setting, and use algorithms
* used in networkd-address-generation.c
*/
if (link_ipv6ll_enabled(link))
return true;
/* IPv6LL address can be manually assigned on WireGuard interface. */
if (streq_ptr(link->kind, "wireguard")) {
Address *a;
if (!link->network)
return false;
ORDERED_HASHMAP_FOREACH(a, link->network->addresses_by_section) {
if (a->family != AF_INET6)
continue;
if (in6_addr_is_set(&a->in_addr_peer.in6))
continue;
if (in6_addr_is_link_local(&a->in_addr.in6))
return true;
}
}
return false;
}
bool link_ipv6_enabled(Link *link) {
assert(link);