1 files changed, 18 insertions, 4 deletions

diff --git a/src/libsystemd-network/sd-dhcp-client.c b/src/libsystemd-network/sd-dhcp-client.c
index 395f7ce4d0..1eb8509f0f 100644
--- a/src/libsystemd-network/sd-dhcp-client.c
+++ b/src/libsystemd-network/sd-dhcp-client.c
@@ -62,6 +62,7 @@ struct sd_dhcp_client {
 
         int fd;
         uint16_t port;
+        uint16_t server_port;
         union sockaddr_union link;
         sd_event_source *receive_message;
         bool request_broadcast;
@@ -516,6 +517,18 @@ int sd_dhcp_client_set_client_port(
         return 0;
 }
 
+int sd_dhcp_client_set_port(
+                sd_dhcp_client *client,
+                uint16_t port) {
+
+        assert_return(client, -EINVAL);
+        assert_return(!sd_dhcp_client_is_running(client), -EBUSY);
+
+        client->server_port = port;
+
+        return 0;
+}
+
 int sd_dhcp_client_set_mtu(sd_dhcp_client *client, uint32_t mtu) {
         assert_return(client, -EINVAL);
         assert_return(mtu >= DHCP_MIN_PACKET_SIZE, -ERANGE);
@@ -891,7 +904,7 @@ static int dhcp_client_send_raw(
                 size_t len) {
 
         dhcp_packet_append_ip_headers(packet, INADDR_ANY, client->port,
-                                      INADDR_BROADCAST, DHCP_PORT_SERVER, len, client->ip_service_type);
+                                      INADDR_BROADCAST, client->server_port, len, client->ip_service_type);
 
         return dhcp_network_send_raw_socket(client->fd, &client->link,
                                             packet, len);
@@ -1113,7 +1126,7 @@ static int client_send_request(sd_dhcp_client *client) {
         if (client->state == DHCP_STATE_RENEWING)
                 r = dhcp_network_send_udp_socket(client->fd,
                                                  client->lease->server_address,
-                                                 DHCP_PORT_SERVER,
+                                                 client->server_port,
                                                  &request->dhcp,
                                                  sizeof(DHCPMessage) + optoffset);
         else
@@ -2203,7 +2216,7 @@ int sd_dhcp_client_send_release(sd_dhcp_client *client) {
 
         r = dhcp_network_send_udp_socket(client->fd,
                                          client->lease->server_address,
-                                         DHCP_PORT_SERVER,
+                                         client->server_port,
                                          &release->dhcp,
                                          sizeof(DHCPMessage) + optoffset);
         if (r < 0)
@@ -2237,7 +2250,7 @@ int sd_dhcp_client_send_decline(sd_dhcp_client *client) {
 
         r = dhcp_network_send_udp_socket(client->fd,
                                          client->lease->server_address,
-                                         DHCP_PORT_SERVER,
+                                         client->server_port,
                                          &release->dhcp,
                                          sizeof(DHCPMessage) + optoffset);
         if (r < 0)
@@ -2382,6 +2395,7 @@ int sd_dhcp_client_new(sd_dhcp_client **ret, int anonymize) {
                 .fd = -EBADF,
                 .mtu = DHCP_MIN_PACKET_SIZE,
                 .port = DHCP_PORT_CLIENT,
+                .server_port = DHCP_PORT_SERVER,
                 .anonymize = !!anonymize,
                 .max_discover_attempts = UINT64_MAX,
                 .max_request_attempts = 5,