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network/ipv4ll: use a foreign IPv4LL address when KeepConfiguration=dhcp

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This is similar to what we do for DHCPv4 address, but for IPv4LL
address.
This commit is contained in:
Yu Watanabe 2024-11-07 03:40:04 +09:00
parent 4eca221ab8
commit d13ce4ea0d
1 changed files with 23 additions and 0 deletions
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23
src/network/networkd-ipv4ll.c
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@ -175,6 +175,8 @@ static int ipv4ll_check_mac(sd_ipv4ll *ll, const struct ether_addr *mac, void *u
}
static int ipv4ll_set_address(Link *link) {
int r;
assert(link);
assert(link->network);
assert(link->ipv4ll);
@ -193,6 +195,27 @@ static int ipv4ll_set_address(Link *link) {
if (in4_addr_is_set(&link->network->ipv4ll_start_address))
return sd_ipv4ll_set_address(link->ipv4ll, &link->network->ipv4ll_start_address);
/* 3. If KeepConfiguration=dhcp, use a foreign IPv4LL address. */
if (!FLAGS_SET(link->network->keep_configuration, KEEP_CONFIGURATION_DHCP))
return 0;
SET_FOREACH(a, link->addresses) {
if (a->source != NETWORK_CONFIG_SOURCE_FOREIGN)
continue;
if (a->family != AF_INET)
continue;
if (!in4_addr_is_link_local_dynamic(&a->in_addr.in))
continue;
r = sd_ipv4ll_set_address(link->ipv4ll, &a->in_addr.in);
if (r < 0)
return r;
/* Make sure the address is not removed by link_drop_unmanaged_addresses(). */
a->source = NETWORK_CONFIG_SOURCE_IPV4LL;
return 0;
}
return 0;
}