networkd: optionally push dhcp timezone into timedated

3 files changed, 69 insertions, 5 deletions

diff --git a/src/network/networkd-dhcp4.c b/src/network/networkd-dhcp4.c
index 3082bf8ac8..4e2936f637 100644
--- a/src/network/networkd-dhcp4.c
+++ b/src/network/networkd-dhcp4.c
@@ -482,6 +482,18 @@ static int dhcp_lease_acquired(sd_dhcp_client *client, Link *link) {
                 }
         }
 
+        if (link->network->dhcp_timezone) {
+                const char *tz = NULL;
+
+                (void) sd_dhcp_lease_get_timezone(link->dhcp_lease, &tz);
+
+                if (tz) {
+                        r = link_set_timezone(link, tz);
+                        if (r < 0)
+                                log_link_error_errno(link, r, "Failed to set timezone to '%s': %m", tz);
+                }
+        }
+
         if (!link->network->dhcp_critical) {
                 r = sd_dhcp_lease_get_lifetime(link->dhcp_lease, &lifetime);
                 if (r < 0) {
diff --git a/src/network/networkd-link.c b/src/network/networkd-link.c
index 5b7ebfb79d..371136a11e 100644
--- a/src/network/networkd-link.c
+++ b/src/network/networkd-link.c
@@ -781,7 +781,7 @@ static int link_set_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userd
 
 static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
         _cleanup_link_unref_ Link *link = userdata;
-        int r;
+        const sd_bus_error *e;
 
         assert(m);
         assert(link);
@@ -789,15 +789,15 @@ static int set_hostname_handler(sd_bus_message *m, void *userdata, sd_bus_error
         if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
                 return 1;
 
-        r = sd_bus_message_get_errno(m);
-        if (r > 0)
-                log_link_warning_errno(link, r, "Could not set hostname: %m");
+        e = sd_bus_message_get_error(m);
+        if (e)
+                log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set hostname: %s", e->message);
 
         return 1;
 }
 
 int link_set_hostname(Link *link, const char *hostname) {
-        int r = 0;
+        int r;
 
         assert(link);
         assert(link->manager);
@@ -832,6 +832,57 @@ int link_set_hostname(Link *link, const char *hostname) {
         return 0;
 }
 
+static int set_timezone_handler(sd_bus_message *m, void *userdata, sd_bus_error *ret_error) {
+        _cleanup_link_unref_ Link *link = userdata;
+        const sd_bus_error *e;
+
+        assert(m);
+        assert(link);
+
+        if (IN_SET(link->state, LINK_STATE_FAILED, LINK_STATE_LINGER))
+                return 1;
+
+        e = sd_bus_message_get_error(m);
+        if (e)
+                log_link_warning_errno(link, sd_bus_error_get_errno(e), "Could not set timezone: %s", e->message);
+
+        return 1;
+}
+
+int link_set_timezone(Link *link, const char *timezone) {
+        int r;
+
+        assert(link);
+        assert(link->manager);
+        assert(timezone);
+
+        log_link_debug(link, "Setting system timezone: '%s'", timezone);
+
+        if (!link->manager->bus) {
+                log_link_info(link, "Not connected to system bus, ignoring timezone.");
+                return 0;
+        }
+
+        r = sd_bus_call_method_async(
+                        link->manager->bus,
+                        NULL,
+                        "org.freedesktop.timedate1",
+                        "/org/freedesktop/timedate1",
+                        "org.freedesktop.timedate1",
+                        "SetTimezone",
+                        set_timezone_handler,
+                        link,
+                        "sb",
+                        timezone,
+                        false);
+        if (r < 0)
+                return log_link_error_errno(link, r, "Could not set timezone: %m");
+
+        link_ref(link);
+
+        return 0;
+}
+
 static int set_mtu_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
         _cleanup_link_unref_ Link *link = userdata;
         int r;
diff --git a/src/network/networkd-link.h b/src/network/networkd-link.h
index 2dcbbda607..0625520790 100644
--- a/src/network/networkd-link.h
+++ b/src/network/networkd-link.h
@@ -115,6 +115,7 @@ bool link_has_carrier(Link *link);
 
 int link_set_mtu(Link *link, uint32_t mtu);
 int link_set_hostname(Link *link, const char *hostname);
+int link_set_timezone(Link *link, const char *timezone);
 
 int ipv4ll_configure(Link *link);
 int dhcp4_configure(Link *link);