networkd: merge DNS and NTP entries when exporting

In the state files, do not distinguish where the various entries came from
(static or DHCP), but include them all in the same list.

1 files changed, 43 insertions, 29 deletions

diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 86d4b83d3b..7e6bc7b1e9 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -2419,27 +2419,6 @@ int link_update(Link *link, sd_rtnl_message *m) {
         return link_update_flags(link, m);
 }
 
-static void serialize_addresses(FILE *f, const char *key, Address *address) {
-        Address *ad;
-
-        assert(f);
-        assert(key);
-
-        if (!address)
-                return;
-
-        fprintf(f, "%s=", key);
-
-        LIST_FOREACH(addresses, ad, address) {
-                char buf[INET6_ADDRSTRLEN];
-
-                if (inet_ntop(ad->family, &ad->in_addr, buf, INET6_ADDRSTRLEN))
-                        fprintf(f, "%s%s", buf, (ad->addresses_next) ? " ": "");
-        }
-
-        fputs("\n", f);
-}
-
 static void link_update_operstate(Link *link) {
 
         assert(link);
@@ -2510,8 +2489,47 @@ int link_save(Link *link) {
                 admin_state, oper_state);
 
         if (link->network) {
-                serialize_addresses(f, "DNS", link->network->dns);
-                serialize_addresses(f, "NTP", link->network->ntp);
+                char **address;
+
+                fputs("DNS=", f);
+
+                if (link->network->dhcp_dns &&
+                    link->dhcp_lease) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_dns(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                serialize_in_addrs(f, addresses, r);
+                                if (link->network->dns)
+                                        fputs(" ", f);
+                        }
+                }
+
+                STRV_FOREACH(address, link->network->dns)
+                        fprintf(f, "%s%s", *address,
+                                (address + 1 ? " " : ""));
+
+                fputs("\n", f);
+
+                fprintf(f, "NTP=");
+
+                if (link->network->dhcp_ntp &&
+                    link->dhcp_lease) {
+                        const struct in_addr *addresses;
+
+                        r = sd_dhcp_lease_get_ntp(link->dhcp_lease, &addresses);
+                        if (r > 0) {
+                                serialize_in_addrs(f, addresses, r);
+                                if (link->network->ntp)
+                                        fputs(" ", f);
+                        }
+                }
+
+                STRV_FOREACH(address, link->network->ntp)
+                        fprintf(f, "%s%s", *address,
+                                (address + 1 ? " " : ""));
+
+                fputs("\n", f);
         }
 
         if (link->dhcp_lease) {
@@ -2522,12 +2540,8 @@ int link_save(Link *link) {
                         goto finish;
 
                 fprintf(f,
-                        "DHCP_LEASE=%s\n"
-                        "DHCP_USE_DNS=%s\n"
-                        "DHCP_USE_NTP=%s\n",
-                        link->lease_file,
-                        yes_no(link->network->dhcp_dns),
-                        yes_no(link->network->dhcp_ntp));
+                        "DHCP_LEASE=%s\n",
+                        link->lease_file);
         } else
                 unlink(link->lease_file);