dhcp: Add function to stop the DHCP client

The client is stopped and brought back to its initial state.

1 files changed, 32 insertions, 0 deletions

diff --git a/src/libsystemd-dhcp/dhcp-client.c b/src/libsystemd-dhcp/dhcp-client.c
index 181c6f8348..bd2882476e 100644
--- a/src/libsystemd-dhcp/dhcp-client.c
+++ b/src/libsystemd-dhcp/dhcp-client.c
@@ -119,6 +119,33 @@ int sd_dhcp_client_set_mac(sd_dhcp_client *client,
         return 0;
 }
 
+static int client_stop(sd_dhcp_client *client, int error)
+{
+        assert_return(client, -EINVAL);
+        assert_return(client->state != DHCP_STATE_INIT &&
+                      client->state != DHCP_STATE_INIT_REBOOT, -EALREADY);
+
+        switch (client->state) {
+
+        case DHCP_STATE_INIT:
+        case DHCP_STATE_SELECTING:
+
+                client->state = DHCP_STATE_INIT;
+                break;
+
+        case DHCP_STATE_INIT_REBOOT:
+        case DHCP_STATE_REBOOTING:
+        case DHCP_STATE_REQUESTING:
+        case DHCP_STATE_BOUND:
+        case DHCP_STATE_RENEWING:
+        case DHCP_STATE_REBINDING:
+
+                break;
+        }
+
+        return 0;
+}
+
 static int client_packet_init(sd_dhcp_client *client, uint8_t type,
                               DHCPMessage *message, uint16_t secs,
                               uint8_t **opt, size_t *optlen)
@@ -263,6 +290,11 @@ int sd_dhcp_client_start(sd_dhcp_client *client)
         return client_send_discover(client, 0);
 }
 
+int sd_dhcp_client_stop(sd_dhcp_client *client)
+{
+        return client_stop(client, 0);
+}
+
 sd_dhcp_client *sd_dhcp_client_new(void)
 {
         sd_dhcp_client *client;