sd-dhcp-client/networkd: add domainname support

1 files changed, 36 insertions, 0 deletions

diff --git a/src/libsystemd/sd-dhcp-client.c b/src/libsystemd/sd-dhcp-client.c
index 26ed35e5fe..908f844671 100644
--- a/src/libsystemd/sd-dhcp-client.c
+++ b/src/libsystemd/sd-dhcp-client.c
@@ -44,6 +44,7 @@ struct DHCPLease {
         struct in_addr *dns;
         size_t dns_size;
         uint16_t mtu;
+        char *domainname;
         char *hostname;
 };
 
@@ -237,6 +238,32 @@ int sd_dhcp_client_get_dns(sd_dhcp_client *client, struct in_addr **addr, size_t
         return 0;
 }
 
+int sd_dhcp_client_get_domainname(sd_dhcp_client *client, const char **domainname) {
+        assert_return(client, -EINVAL);
+        assert_return(domainname, -EINVAL);
+
+        switch (client->state) {
+        case DHCP_STATE_INIT:
+        case DHCP_STATE_SELECTING:
+        case DHCP_STATE_INIT_REBOOT:
+        case DHCP_STATE_REBOOTING:
+        case DHCP_STATE_REQUESTING:
+                return -EADDRNOTAVAIL;
+
+        case DHCP_STATE_BOUND:
+        case DHCP_STATE_RENEWING:
+        case DHCP_STATE_REBINDING:
+                if (client->lease->domainname)
+                        *domainname = client->lease->domainname;
+                else
+                        return -ENOENT;
+
+                break;
+        }
+
+        return 0;
+}
+
 int sd_dhcp_client_get_hostname(sd_dhcp_client *client, const char **hostname) {
         assert_return(client, -EINVAL);
         assert_return(hostname, -EINVAL);
@@ -336,6 +363,7 @@ static void lease_free(DHCPLease *lease) {
                 return;
 
         free(lease->hostname);
+        free(lease->domainname);
         free(lease->dns);
         free(lease);
 }
@@ -832,6 +860,14 @@ static int client_parse_offer(uint8_t code, uint8_t len, const uint8_t *option,
 
                 break;
 
+        case DHCP_OPTION_DOMAIN_NAME:
+                if (len >= 1) {
+                        free(lease->domainname);
+                        lease->domainname = strndup((const char *)option, len);
+                }
+
+                break;
+
         case DHCP_OPTION_HOST_NAME:
                 if (len >= 1) {
                         free(lease->hostname);