add initial support for stateless DHCPv6

Signed-off-by: goldsimon <goldsimon@gmx.de>

src/core/ipv6/nd6.c

@@ -58,6 +58,7 @@
 #include "lwip/netif.h"
 #include "lwip/icmp6.h"
 #include "lwip/mld6.h"
+#include "lwip/dhcp6.h"
 #include "lwip/ip.h"
 #include "lwip/stats.h"
 #include "lwip/dns.h"
@@ -621,6 +622,12 @@ nd6_input(struct pbuf *p, struct netif *inp)
     /* Update flags in local entry (incl. preference). */
     default_router_list[i].flags = ra_hdr->flags;
 
+#if LWIP_IPV6_DHCP6
+    /* Trigger DHCPv6 if enabled */
+    dhcp6_nd6_ra_trigger(inp, ra_hdr->flags & ND6_RA_FLAG_MANAGED_ADDR_CONFIG,
+      ra_hdr->flags & ND6_RA_FLAG_OTHER_CONFIG);
+#endif
+
     /* Offset to options. */
     offset = sizeof(struct ra_header);