diff --git a/nest/config.Y b/nest/config.Y
index 59a776bf..8b697292 100644
--- a/nest/config.Y
+++ b/nest/config.Y
@@ -307,7 +307,7 @@ tos:
 CF_ADDTO(proto, dev_proto '}')
 
 dev_proto_start: proto_start DIRECT {
-     this_proto = proto_config_new(&proto_device, sizeof(struct rt_dev_config), $1);
+     this_proto = proto_config_new(&proto_device, $1);
      init_list(&DIRECT_CFG->iface_list);
    }
  ;
diff --git a/nest/proto.c b/nest/proto.c
index 7a1e9bf7..7339e4f4 100644
--- a/nest/proto.c
+++ b/nest/proto.c
@@ -245,7 +245,6 @@ proto_free_ahooks(struct proto *p)
 /**
  * proto_config_new - create a new protocol configuration
  * @pr: protocol the configuration will belong to
- * @size: size of the structure including generic data
  * @class: SYM_PROTO or SYM_TEMPLATE
  *
  * Whenever the configuration file says that a new instance
@@ -262,9 +261,9 @@ proto_free_ahooks(struct proto *p)
  * initialized during protos_commit()).
  */
 void *
-proto_config_new(struct protocol *pr, unsigned size, int class)
+proto_config_new(struct protocol *pr, int class)
 {
-  struct proto_config *c = cfg_allocz(size);
+  struct proto_config *c = cfg_allocz(pr->config_size);
 
   if (class == SYM_PROTO)
     add_tail(&new_config->protos, &c->n);
diff --git a/nest/protocol.h b/nest/protocol.h
index eb43418b..f46e0b13 100644
--- a/nest/protocol.h
+++ b/nest/protocol.h
@@ -40,7 +40,8 @@ struct protocol {
   int name_counter;			/* Counter for automatic name generation */
   int attr_class;			/* Attribute class known to this protocol */
   int multitable;			/* Protocol handles all announce hooks itself */
-  unsigned preference;			/* Default protocol preference */
+  uint preference;			/* Default protocol preference */
+  uint config_size;			/* Size of protocol config */
 
   void (*preconfig)(struct protocol *, struct config *);	/* Just before configuring */
   void (*postconfig)(struct proto_config *);			/* After configuring each instance */
@@ -126,7 +127,7 @@ struct proto_stats {
   u32 exp_updates_received;	/* Number of route updates received */
   u32 exp_updates_rejected;	/* Number of route updates rejected by protocol */
   u32 exp_updates_filtered;	/* Number of route updates rejected by filters */
-  u32 exp_updates_accepted;	/* Number of route updates accepted and exported */ 
+  u32 exp_updates_accepted;	/* Number of route updates accepted and exported */
   u32 exp_withdraws_received;	/* Number of route withdraws received */
   u32 exp_withdraws_accepted;	/* Number of route withdraws accepted and processed */
 };
@@ -148,7 +149,7 @@ struct proto {
   byte disabled;			/* Manually disabled */
   byte proto_state;			/* Protocol state machine (PS_*, see below) */
   byte core_state;			/* Core state machine (FS_*, see below) */
-  byte export_state;			/* Route export state (ES_*, see below) */	
+  byte export_state;			/* Route export state (ES_*, see below) */
   byte reconfiguring;			/* We're shutting down due to reconfiguration */
   byte refeeding;			/* We are refeeding (valid only if export_state == ES_FEEDING) */
   byte flushing;			/* Protocol is flushed in current flush loop round */
@@ -194,7 +195,7 @@ struct proto {
   /*
    *	Routing entry hooks (called only for routes belonging to this protocol):
    *
-   *	   rte_recalculate Called at the beginning of the best route selection  
+   *	   rte_recalculate Called at the beginning of the best route selection
    *	   rte_better	Compare two rte's and decide which one is better (1=first, 0=second).
    *       rte_same	Compare two rte's and decide whether they are identical (1=yes, 0=no).
    *	   rte_insert	Called whenever a rte is inserted to a routing table.
@@ -239,7 +240,7 @@ struct proto_spec {
 
 
 void *proto_new(struct proto_config *, unsigned size);
-void *proto_config_new(struct protocol *, unsigned size, int class);
+void *proto_config_new(struct protocol *, int class);
 void proto_copy_config(struct proto_config *dest, struct proto_config *src);
 void proto_request_feeding(struct proto *p);
 
@@ -350,7 +351,7 @@ void proto_notify_state(struct proto *p, unsigned state);
  *		FEEDING/UP --> HAPPY/UP --> FLUSHING/STOP|DOWN -->
  *		HUNGRY/STOP|DOWN --> HUNGRY/DOWN
  *
- *	Sometimes, protocol might switch from HAPPY/UP to FEEDING/UP 
+ *	Sometimes, protocol might switch from HAPPY/UP to FEEDING/UP
  *	if it wants to refeed the routes (for example BGP does so
  *	as a result of received ROUTE-REFRESH request).
  */
@@ -432,7 +433,7 @@ proto_reset_limit(struct proto_limit *l)
     l->state = PLS_INITIAL;
 }
 
- 
+
 /*
  *	Route Announcement Hook
  */
diff --git a/nest/rt-dev.c b/nest/rt-dev.c
index 53deaa52..87ffc5ec 100644
--- a/nest/rt-dev.c
+++ b/nest/rt-dev.c
@@ -93,7 +93,7 @@ dev_reconfigure(struct proto *p, struct proto_config *new)
 {
   struct rt_dev_config *o = (struct rt_dev_config *) p->cf;
   struct rt_dev_config *n = (struct rt_dev_config *) new;
-  
+
   return iface_patts_equal(&o->iface_list, &n->iface_list, NULL);
 }
 
@@ -115,6 +115,7 @@ struct protocol proto_device = {
   .name = 		"Direct",
   .template = 		"direct%d",
   .preference = 	DEF_PREF_DIRECT,
+  .config_size =	sizeof(struct rt_dev_config),
   .init = 		dev_init,
   .reconfigure = 	dev_reconfigure,
   .copy_config = 	dev_copy_config
diff --git a/proto/bfd/bfd.c b/proto/bfd/bfd.c
index 23e04e40..5f089846 100644
--- a/proto/bfd/bfd.c
+++ b/proto/bfd/bfd.c
@@ -1112,6 +1112,7 @@ bfd_show_sessions(struct proto *P)
 struct protocol proto_bfd = {
   .name =		"BFD",
   .template =		"bfd%d",
+  .config_size =	sizeof(struct bfd_config),
   .init =		bfd_init,
   .start =		bfd_start,
   .shutdown =		bfd_shutdown,
diff --git a/proto/bfd/config.Y b/proto/bfd/config.Y
index 1b07495e..4affb927 100644
--- a/proto/bfd/config.Y
+++ b/proto/bfd/config.Y
@@ -34,7 +34,7 @@ CF_ADDTO(proto, bfd_proto)
 
 bfd_proto_start: proto_start BFD
 {
-  this_proto = proto_config_new(&proto_bfd, sizeof(struct bfd_config), $1);
+  this_proto = proto_config_new(&proto_bfd, $1);
   init_list(&BFD_CFG->patt_list);
   init_list(&BFD_CFG->neigh_list);
 
diff --git a/proto/bgp/bgp.c b/proto/bgp/bgp.c
index c8b1867b..016d3e60 100644
--- a/proto/bgp/bgp.c
+++ b/proto/bgp/bgp.c
@@ -1455,6 +1455,7 @@ struct protocol proto_bgp = {
   .template = 		"bgp%d",
   .attr_class = 	EAP_BGP,
   .preference = 	DEF_PREF_BGP,
+  .config_size =	sizeof(struct bgp_config),
   .init = 		bgp_init,
   .start = 		bgp_start,
   .shutdown = 		bgp_shutdown,
diff --git a/proto/bgp/config.Y b/proto/bgp/config.Y
index e4875b27..ed40634f 100644
--- a/proto/bgp/config.Y
+++ b/proto/bgp/config.Y
@@ -34,7 +34,7 @@ CF_GRAMMAR
 CF_ADDTO(proto, bgp_proto '}' { bgp_check_config(BGP_CFG); } )
 
 bgp_proto_start: proto_start BGP {
-     this_proto = proto_config_new(&proto_bgp, sizeof(struct bgp_config), $1);
+     this_proto = proto_config_new(&proto_bgp, $1);
      BGP_CFG->multihop = -1;	/* undefined */
      BGP_CFG->hold_time = 240;
      BGP_CFG->connect_retry_time = 120;
diff --git a/proto/ospf/config.Y b/proto/ospf/config.Y
index 268b9539..c859960f 100644
--- a/proto/ospf/config.Y
+++ b/proto/ospf/config.Y
@@ -141,7 +141,7 @@ CF_GRAMMAR
 CF_ADDTO(proto, ospf_proto '}' { ospf_proto_finish(); } )
 
 ospf_proto_start: proto_start OSPF {
-     this_proto = proto_config_new(&proto_ospf, sizeof(struct ospf_config), $1);
+     this_proto = proto_config_new(&proto_ospf, $1);
      init_list(&OSPF_CFG->area_list);
      init_list(&OSPF_CFG->vlink_list);
      OSPF_CFG->tick = OSPF_DEFAULT_TICK;
diff --git a/proto/ospf/ospf.c b/proto/ospf/ospf.c
index dab7aab8..1bc4e077 100644
--- a/proto/ospf/ospf.c
+++ b/proto/ospf/ospf.c
@@ -1457,6 +1457,7 @@ struct protocol proto_ospf = {
   .template =		"ospf%d",
   .attr_class =		EAP_OSPF,
   .preference =		DEF_PREF_OSPF,
+  .config_size =	sizeof(struct ospf_config),
   .init =		ospf_init,
   .dump =		ospf_dump,
   .start =		ospf_start,
diff --git a/proto/pipe/config.Y b/proto/pipe/config.Y
index 40637558..8daf2e7c 100644
--- a/proto/pipe/config.Y
+++ b/proto/pipe/config.Y
@@ -23,7 +23,7 @@ CF_GRAMMAR
 CF_ADDTO(proto, pipe_proto '}')
 
 pipe_proto_start: proto_start PIPE {
-     this_proto = proto_config_new(&proto_pipe, sizeof(struct pipe_config), $1);
+     this_proto = proto_config_new(&proto_pipe, $1);
      PIPE_CFG->mode = PIPE_TRANSPARENT;
   }
  ;
diff --git a/proto/pipe/pipe.c b/proto/pipe/pipe.c
index d6ef153a..6ef80322 100644
--- a/proto/pipe/pipe.c
+++ b/proto/pipe/pipe.c
@@ -247,7 +247,7 @@ pipe_reconfigure(struct proto *P, struct proto_config *new)
 
   if ((P->proto_state != PS_UP) || (proto_reconfig_type == RECONFIG_SOFT))
     return 1;
-  
+
   if ((new->preference != old->preference)
       || ! filter_same(new->in_filter, old->in_filter)
       || ! filter_same(new->out_filter, old->out_filter))
@@ -298,7 +298,7 @@ pipe_show_stats(struct pipe_proto *p)
    * (imp/exp), while stats s2 have switched 'polarity'.
    */
 
-  cli_msg(-1006, "  Routes:         %u imported, %u exported", 
+  cli_msg(-1006, "  Routes:         %u imported, %u exported",
 	  s1->imp_routes, s2->imp_routes);
   cli_msg(-1006, "  Route change stats:     received   rejected   filtered    ignored   accepted");
   cli_msg(-1006, "    Import updates:     %10u %10u %10u %10u %10u",
@@ -340,6 +340,7 @@ struct protocol proto_pipe = {
   .template =		"pipe%d",
   .multitable =		1,
   .preference =		DEF_PREF_PIPE,
+  .config_size =	sizeof(struct pipe_config),
   .postconfig =		pipe_postconfig,
   .init =		pipe_init,
   .start =		pipe_start,
diff --git a/proto/radv/config.Y b/proto/radv/config.Y
index a26ea88e..da300667 100644
--- a/proto/radv/config.Y
+++ b/proto/radv/config.Y
@@ -40,7 +40,7 @@ CF_ADDTO(proto, radv_proto)
 
 radv_proto_start: proto_start RADV
 {
-  this_proto = proto_config_new(&proto_radv, sizeof(struct radv_config), $1);
+  this_proto = proto_config_new(&proto_radv, $1);
   init_list(&RADV_CFG->patt_list);
   init_list(&RADV_CFG->pref_list);
   init_list(&RADV_CFG->rdnss_list);
diff --git a/proto/radv/radv.c b/proto/radv/radv.c
index 6be7cd84..6370e006 100644
--- a/proto/radv/radv.c
+++ b/proto/radv/radv.c
@@ -207,7 +207,7 @@ radv_iface_remove(struct radv_iface *ifa)
 
 static void
 radv_if_notify(struct proto *p, unsigned flags, struct iface *iface)
-{ 
+{
   struct proto_radv *ra = (struct proto_radv *) p;
   struct radv_config *cf = (struct radv_config *) (p->cf);
 
@@ -361,7 +361,7 @@ radv_reconfigure(struct proto *p, struct proto_config *c)
   // struct radv_config *old = (struct radv_config *) (p->cf);
   struct radv_config *new = (struct radv_config *) c;
 
-  /* 
+  /*
    * The question is why there is a reconfigure function for RAdv if
    * it has almost none internal state so restarting the protocol
    * would probably suffice. One small reason is that restarting the
@@ -426,6 +426,7 @@ radv_get_status(struct proto *p, byte *buf)
 struct protocol proto_radv = {
   .name =		"RAdv",
   .template =		"radv%d",
+  .config_size =	sizeof(struct radv_config),
   .init =		radv_init,
   .start =		radv_start,
   .shutdown =		radv_shutdown,
diff --git a/proto/rip/config.Y b/proto/rip/config.Y
index 76397520..b2b99095 100644
--- a/proto/rip/config.Y
+++ b/proto/rip/config.Y
@@ -43,7 +43,7 @@ CF_GRAMMAR
 CF_ADDTO(proto, rip_cfg '}' { RIP_CFG->passwords = get_passwords(); } )
 
 rip_cfg_start: proto_start RIP {
-     this_proto = proto_config_new(&proto_rip, sizeof(struct rip_proto_config), $1);
+     this_proto = proto_config_new(&proto_rip, $1);
      rip_init_config(RIP_CFG);
    }
  ;
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index f41f52e7..b77cf409 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -1050,12 +1050,12 @@ struct protocol proto_rip = {
   .template =		"rip%d",
   .attr_class =		EAP_RIP,
   .preference =		DEF_PREF_RIP,
-  .get_route_info =	rip_get_route_info,
-  .get_attr =		rip_get_attr,
-
+  .config_size =	sizeof(struct rip_proto_config),
   .init =		rip_init,
   .dump =		rip_dump,
   .start =		rip_start,
   .reconfigure =	rip_reconfigure,
-  .copy_config =	rip_copy_config
+  .copy_config =	rip_copy_config,
+  .get_route_info =	rip_get_route_info,
+  .get_attr =		rip_get_attr
 };
diff --git a/proto/static/config.Y b/proto/static/config.Y
index 2d9d4b42..a8bfa36f 100644
--- a/proto/static/config.Y
+++ b/proto/static/config.Y
@@ -26,7 +26,7 @@ CF_GRAMMAR
 CF_ADDTO(proto, static_proto '}')
 
 static_proto_start: proto_start STATIC {
-     this_proto = proto_config_new(&proto_static, sizeof(struct static_config), $1);
+     this_proto = proto_config_new(&proto_static, $1);
      static_init_config((struct static_config *) this_proto);
   }
  ;
diff --git a/proto/static/static.c b/proto/static/static.c
index 8c31cdb8..4b72fa9d 100644
--- a/proto/static/static.c
+++ b/proto/static/static.c
@@ -531,6 +531,7 @@ struct protocol proto_static = {
   .name =		"Static",
   .template =		"static%d",
   .preference =		DEF_PREF_STATIC,
+  .config_size =	sizeof(struct static_config),
   .init =		static_init,
   .dump =		static_dump,
   .start =		static_start,
diff --git a/sysdep/unix/krt.c b/sysdep/unix/krt.c
index 398d1ebb..78514cf5 100644
--- a/sysdep/unix/krt.c
+++ b/sysdep/unix/krt.c
@@ -251,7 +251,7 @@ kif_init_config(int class)
   if (kif_cf)
     cf_error("Kernel device protocol already defined");
 
-  kif_cf = (struct kif_config *) proto_config_new(&proto_unix_iface, sizeof(struct kif_config), class);
+  kif_cf = (struct kif_config *) proto_config_new(&proto_unix_iface, class);
   kif_cf->scan_time = 60;
   init_list(&kif_cf->primary);
 
@@ -280,6 +280,7 @@ struct protocol proto_unix_iface = {
   .name = 		"Device",
   .template = 		"device%d",
   .preference =		DEF_PREF_DIRECT,
+  .config_size =	sizeof(struct kif_config),
   .preconfig =		kif_preconfig,
   .init =		kif_init,
   .start =		kif_start,
@@ -1150,7 +1151,7 @@ krt_init_config(int class)
     cf_error("Kernel protocol already defined");
 #endif
 
-  krt_cf = (struct krt_config *) proto_config_new(&proto_unix_kernel, sizeof(struct krt_config), class);
+  krt_cf = (struct krt_config *) proto_config_new(&proto_unix_kernel, class);
   krt_cf->scan_time = 60;
 
   krt_sys_init_config(krt_cf);
@@ -1202,6 +1203,7 @@ struct protocol proto_unix_kernel = {
   .template =		"kernel%d",
   .attr_class =		EAP_KRT,
   .preference =		DEF_PREF_INHERITED,
+  .config_size =	sizeof(struct krt_config),
   .preconfig =		krt_preconfig,
   .postconfig =		krt_postconfig,
   .init =		krt_init,