sd-dhcp6-client: Implement Rapid Commit

Add a Rapid Commit option to Solicit messages and expect a Reply to
be received instead of an Advertise. When receiving a DHCPv6 message
from the server in state Solicit, continue testing whether the
message is a Reply. Ease up the message type checking, it's not fatal
if the message is of a wrong type.

Add helper functions to set/get the rapid commit of a lease. See
RFC 3315, sections 17., 17.1.2., 17.1.4. and 18.1.8.

1 files changed, 17 insertions, 0 deletions

diff --git a/src/libsystemd-network/sd-dhcp6-lease.c b/src/libsystemd-network/sd-dhcp6-lease.c
index 17a4b64063..b9d0503642 100644
--- a/src/libsystemd-network/sd-dhcp6-lease.c
+++ b/src/libsystemd-network/sd-dhcp6-lease.c
@@ -118,6 +118,23 @@ int dhcp6_lease_get_preference(sd_dhcp6_lease *lease, uint8_t *preference) {
         return 0;
 }
 
+int dhcp6_lease_set_rapid_commit(sd_dhcp6_lease *lease) {
+        assert_return(lease, -EINVAL);
+
+        lease->rapid_commit = true;
+
+        return 0;
+}
+
+int dhcp6_lease_get_rapid_commit(sd_dhcp6_lease *lease, bool *rapid_commit) {
+        assert_return(lease, -EINVAL);
+        assert_return(rapid_commit, -EINVAL);
+
+        *rapid_commit = lease->rapid_commit;
+
+        return 0;
+}
+
 int dhcp6_lease_get_iaid(sd_dhcp6_lease *lease, be32_t *iaid) {
         assert_return(lease, -EINVAL);
         assert_return(iaid, -EINVAL);