dhcpserver: Initial DHCP server support, hands out leases but doesn't expire them

extras/dhcpserver/include/dhcpserver.h

@@ -0,0 +1,34 @@
+/* Very basic LWIP & FreeRTOS-based DHCP server
+
+ */
+#ifndef _DHCPSERVER_H
+#define _DHCPSERVER_H
+
+#ifndef DHCPSERVER_MAXCLIENTS
+#define DHCPSERVER_MAXCLIENTS 4
+#endif
+
+/* First client IP to hand out.
+
+   IP assignment routine is very simple - Fourth octet in IP will be incremented
+   from this value to (value+DHCPSERVER_MAXCLIENTS-1).
+*/
+#ifndef DHCPSERVER_FIRST_CLIENT_IP
+#define DHCPSERVER_FIRST_CLIENT_IP(DST) IP4_ADDR(DST, 192, 168, 3, 5)
+#endif
+
+#ifndef DHCPSERVER_LEASE_TIME
+#define DHCPSERVER_LEASE_TIME 30
+#endif
+
+/* Start DHCP server.
+
+   Static IP of server should already be set and network interface enabled.
+*/
+void dhcpserver_start(void);
+
+/* Stop DHCP server.
+ */
+void dhcpserver_stop(void);
+
+#endif