1 files changed, 290 insertions, 180 deletions

diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index 22313f43..554f2c97 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -6,6 +6,7 @@
  *	Can be freely distributed and used under the terms of the GNU GPL.
  */
 
+#include <alloca.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
@@ -19,9 +20,9 @@
 #include "nest/route.h"
 #include "nest/protocol.h"
 #include "nest/iface.h"
-#include "lib/timer.h"
-#include "lib/unix.h"
-#include "lib/krt.h"
+#include "sysdep/unix/timer.h"
+#include "sysdep/unix/unix.h"
+#include "sysdep/unix/krt.h"
 #include "lib/socket.h"
 #include "lib/string.h"
 #include "lib/hash.h"
@@ -50,11 +51,7 @@
 #endif
 
 
-#ifdef IPV6
-#define krt_ecmp6(X) 1
-#else
-#define krt_ecmp6(X) 0
-#endif
+#define krt_ecmp6(p) ((p)->af == AF_INET6)
 
 /*
  * Structure nl_parse_state keeps state of received route processing. Ideally,
@@ -302,20 +299,18 @@ static struct nl_want_attrs ifla_attr_want[BIRD_IFLA_MAX] = {
 
 #define BIRD_IFA_MAX  (IFA_FLAGS+1)
 
-#ifndef IPV6
 static struct nl_want_attrs ifa_attr_want4[BIRD_IFA_MAX] = {
   [IFA_ADDRESS]	  = { 1, 1, sizeof(ip4_addr) },
   [IFA_LOCAL]	  = { 1, 1, sizeof(ip4_addr) },
   [IFA_BROADCAST] = { 1, 1, sizeof(ip4_addr) },
   [IFA_FLAGS]	  = { 1, 1, sizeof(u32) },
 };
-#else
+
 static struct nl_want_attrs ifa_attr_want6[BIRD_IFA_MAX] = {
   [IFA_ADDRESS]	  = { 1, 1, sizeof(ip6_addr) },
   [IFA_LOCAL]	  = { 1, 1, sizeof(ip6_addr) },
   [IFA_FLAGS]	  = { 1, 1, sizeof(u32) },
 };
-#endif
 
 
 #define BIRD_RTA_MAX  (RTA_TABLE+1)
@@ -324,7 +319,6 @@ static struct nl_want_attrs mpnh_attr_want4[BIRD_RTA_MAX] = {
   [RTA_GATEWAY]	  = { 1, 1, sizeof(ip4_addr) },
 };
 
-#ifndef IPV6
 static struct nl_want_attrs rtm_attr_want4[BIRD_RTA_MAX] = {
   [RTA_DST]	  = { 1, 1, sizeof(ip4_addr) },
   [RTA_OIF]	  = { 1, 1, sizeof(u32) },
@@ -336,7 +330,7 @@ static struct nl_want_attrs rtm_attr_want4[BIRD_RTA_MAX] = {
   [RTA_FLOW]	  = { 1, 1, sizeof(u32) },
   [RTA_TABLE]	  = { 1, 1, sizeof(u32) },
 };
-#else
+
 static struct nl_want_attrs rtm_attr_want6[BIRD_RTA_MAX] = {
   [RTA_DST]	  = { 1, 1, sizeof(ip6_addr) },
   [RTA_IIF]	  = { 1, 1, sizeof(u32) },
@@ -348,7 +342,6 @@ static struct nl_want_attrs rtm_attr_want6[BIRD_RTA_MAX] = {
   [RTA_FLOW]	  = { 1, 1, sizeof(u32) },
   [RTA_TABLE]	  = { 1, 1, sizeof(u32) },
 };
-#endif
 
 
 static int
@@ -364,7 +357,7 @@ nl_parse_attrs(struct rtattr *a, struct nl_want_attrs *want, struct rtattr **k,
 
       if (want[a->rta_type].checksize && (RTA_PAYLOAD(a) != want[a->rta_type].size))
 	{
-	  log(L_ERR "nl_parse_attrs: Malformed message received");
+	  log(L_ERR "nl_parse_attrs: Malformed attribute received");
 	  return 0;
 	}
 
@@ -389,6 +382,13 @@ static inline ip4_addr rta_get_ip4(struct rtattr *a)
 static inline ip6_addr rta_get_ip6(struct rtattr *a)
 { return ip6_ntoh(*(ip6_addr *) RTA_DATA(a)); }
 
+static inline ip_addr rta_get_ipa(struct rtattr *a)
+{
+  if (RTA_PAYLOAD(a) == sizeof(ip4_addr))
+    return ipa_from_ip4(rta_get_ip4(a));
+  else
+    return ipa_from_ip6(rta_get_ip6(a));
+}
 
 struct rtattr *
 nl_add_attr(struct nlmsghdr *h, uint bufsize, uint code, const void *data, uint dlen)
@@ -411,16 +411,32 @@ nl_add_attr(struct nlmsghdr *h, uint bufsize, uint code, const void *data, uint
 }
 
 static inline void
-nl_add_attr_u32(struct nlmsghdr *h, unsigned bufsize, int code, u32 data)
+nl_add_attr_u32(struct nlmsghdr *h, uint bufsize, int code, u32 data)
 {
   nl_add_attr(h, bufsize, code, &data, 4);
 }
 
 static inline void
-nl_add_attr_ipa(struct nlmsghdr *h, unsigned bufsize, int code, ip_addr ipa)
+nl_add_attr_ip4(struct nlmsghdr *h, uint bufsize, int code, ip4_addr ip4)
+{
+  ip4 = ip4_hton(ip4);
+  nl_add_attr(h, bufsize, code, &ip4, sizeof(ip4));
+}
+
+static inline void
+nl_add_attr_ip6(struct nlmsghdr *h, uint bufsize, int code, ip6_addr ip6)
 {
-  ipa_hton(ipa);
-  nl_add_attr(h, bufsize, code, &ipa, sizeof(ipa));
+  ip6 = ip6_hton(ip6);
+  nl_add_attr(h, bufsize, code, &ip6, sizeof(ip6));
+}
+
+static inline void
+nl_add_attr_ipa(struct nlmsghdr *h, uint bufsize, int code, ip_addr ipa)
+{
+  if (ipa_is_ip4(ipa))
+    nl_add_attr_ip4(h, bufsize, code, ipa_to_ip4(ipa));
+  else
+    nl_add_attr_ip6(h, bufsize, code, ipa_to_ip6(ipa));
 }
 
 static inline struct rtattr *
@@ -456,7 +472,7 @@ nl_close_nexthop(struct nlmsghdr *h, struct rtnexthop *nh)
 }
 
 static void
-nl_add_multipath(struct nlmsghdr *h, unsigned bufsize, struct mpnh *nh)
+nl_add_multipath(struct nlmsghdr *h, uint bufsize, struct mpnh *nh)
 {
   struct rtattr *a = nl_open_attr(h, bufsize, RTA_MULTIPATH);
 
@@ -518,12 +534,12 @@ nl_parse_multipath(struct krt_proto *p, struct rtattr *ra)
       nl_parse_attrs(RTNH_DATA(nh), mpnh_attr_want4, a, sizeof(a));
       if (a[RTA_GATEWAY])
 	{
-	  memcpy(&rv->gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ip_addr));
-	  ipa_ntoh(rv->gw);
+	  rv->gw = rta_get_ipa(a[RTA_GATEWAY]);
 
-	  neighbor *ng = neigh_find2(&p->p, &rv->gw, rv->iface,
-				     (nh->rtnh_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
-	  if (!ng || (ng->scope == SCOPE_HOST))
+	  neighbor *nbr;
+	  nbr = neigh_find2(&p->p, &rv->gw, rv->iface,
+			    (nh->rtnh_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
+	  if (!nbr || (nbr->scope == SCOPE_HOST))
 	    return NULL;
 	}
       else
@@ -658,52 +674,131 @@ nl_parse_link(struct nlmsghdr *h, int scan)
 }
 
 static void
-nl_parse_addr(struct nlmsghdr *h, int scan)
+nl_parse_addr4(struct ifaddrmsg *i, int scan, int new)
 {
-  struct ifaddrmsg *i;
   struct rtattr *a[BIRD_IFA_MAX];
-  int new = h->nlmsg_type == RTM_NEWADDR;
-  struct ifa ifa;
   struct iface *ifi;
-  int scope;
   u32 ifa_flags;
+  int scope;
 
-  if (!(i = nl_checkin(h, sizeof(*i))))
+  if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want4, a, sizeof(a)))
     return;
 
-  switch (i->ifa_family)
+  if (!a[IFA_LOCAL])
     {
-#ifndef IPV6
-      case AF_INET:
-	if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want4, a, sizeof(a)))
-	  return;
-	if (!a[IFA_LOCAL])
-	  {
-	    log(L_ERR "KIF: Malformed message received (missing IFA_LOCAL)");
-	    return;
-	  }
-	break;
-#else
-      case AF_INET6:
-	if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want6, a, sizeof(a)))
-	  return;
-	break;
-#endif
-      default:
-	return;
+      log(L_ERR "KIF: Malformed message received (missing IFA_LOCAL)");
+      return;
     }
-
   if (!a[IFA_ADDRESS])
     {
       log(L_ERR "KIF: Malformed message received (missing IFA_ADDRESS)");
       return;
     }
 
+  ifi = if_find_by_index(i->ifa_index);
+  if (!ifi)
+    {
+      log(L_ERR "KIF: Received address message for unknown interface %d", i->ifa_index);
+      return;
+    }
+
   if (a[IFA_FLAGS])
     ifa_flags = rta_get_u32(a[IFA_FLAGS]);
   else
     ifa_flags = i->ifa_flags;
 
+  struct ifa ifa;
+  bzero(&ifa, sizeof(ifa));
+  ifa.iface = ifi;
+  if (ifa_flags & IFA_F_SECONDARY)
+    ifa.flags |= IA_SECONDARY;
+
+  ifa.ip = rta_get_ipa(a[IFA_LOCAL]);
+
+  if (i->ifa_prefixlen > IP4_MAX_PREFIX_LENGTH)
+    {
+      log(L_ERR "KIF: Invalid prefix length for interface %s: %d", ifi->name, i->ifa_prefixlen);
+      new = 0;
+    }
+  if (i->ifa_prefixlen == IP4_MAX_PREFIX_LENGTH)
+    {
+      ifa.brd = rta_get_ipa(a[IFA_ADDRESS]);
+      net_fill_ip4(&ifa.prefix, rta_get_ip4(a[IFA_ADDRESS]), i->ifa_prefixlen);
+
+      /* It is either a host address or a peer address */
+      if (ipa_equal(ifa.ip, ifa.brd))
+	ifa.flags |= IA_HOST;
+      else
+	{
+	  ifa.flags |= IA_PEER;
+	  ifa.opposite = ifa.brd;
+	}
+    }
+  else
+    {
+      net_fill_ip4(&ifa.prefix, ipa_to_ip4(ifa.ip), i->ifa_prefixlen);
+      net_normalize(&ifa.prefix);
+
+      if (i->ifa_prefixlen == IP4_MAX_PREFIX_LENGTH - 1)
+	ifa.opposite = ipa_opposite_m1(ifa.ip);
+
+      if (i->ifa_prefixlen == IP4_MAX_PREFIX_LENGTH - 2)
+	ifa.opposite = ipa_opposite_m2(ifa.ip);
+
+      if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST])
+	{
+	  ip4_addr xbrd = rta_get_ip4(a[IFA_BROADCAST]);
+	  ip4_addr ybrd = ip4_or(ipa_to_ip4(ifa.ip), ip4_not(ip4_mkmask(i->ifa_prefixlen)));
+
+	  if (ip4_equal(xbrd, net4_prefix(&ifa.prefix)) || ip4_equal(xbrd, ybrd))
+	    ifa.brd = ipa_from_ip4(xbrd);
+	  else if (ifi->flags & IF_TMP_DOWN) /* Complain only during the first scan */
+	    {
+	      log(L_ERR "KIF: Invalid broadcast address %I4 for %s", xbrd, ifi->name);
+	      ifa.brd = ipa_from_ip4(ybrd);
+	    }
+	}
+    }
+
+  scope = ipa_classify(ifa.ip);
+  if (scope < 0)
+    {
+      log(L_ERR "KIF: Invalid interface address %I for %s", ifa.ip, ifi->name);
+      return;
+    }
+  ifa.scope = scope & IADDR_SCOPE_MASK;
+
+  DBG("KIF: IF%d(%s): %s IPA %I, flg %x, net %N, brd %I, opp %I\n",
+      ifi->index, ifi->name,
+      new ? "added" : "removed",
+      ifa.ip, ifa.flags, ifa.prefix, ifa.brd, ifa.opposite);
+
+  if (new)
+    ifa_update(&ifa);
+  else
+    ifa_delete(&ifa);
+
+  if (!scan)
+    if_end_partial_update(ifi);
+}
+
+static void
+nl_parse_addr6(struct ifaddrmsg *i, int scan, int new)
+{
+  struct rtattr *a[BIRD_IFA_MAX];
+  struct iface *ifi;
+  u32 ifa_flags;
+  int scope;
+
+  if (!nl_parse_attrs(IFA_RTA(i), ifa_attr_want6, a, sizeof(a)))
+    return;
+
+  if (!a[IFA_ADDRESS])
+    {
+      log(L_ERR "KIF: Malformed message received (missing IFA_ADDRESS)");
+      return;
+    }
+
   ifi = if_find_by_index(i->ifa_index);
   if (!ifi)
     {
@@ -711,65 +806,50 @@ nl_parse_addr(struct nlmsghdr *h, int scan)
       return;
     }
 
+  if (a[IFA_FLAGS])
+    ifa_flags = rta_get_u32(a[IFA_FLAGS]);
+  else
+    ifa_flags = i->ifa_flags;
+
+  struct ifa ifa;
   bzero(&ifa, sizeof(ifa));
   ifa.iface = ifi;
   if (ifa_flags & IFA_F_SECONDARY)
     ifa.flags |= IA_SECONDARY;
 
-#ifdef IPV6
   /* Ignore tentative addresses silently */
   if (ifa_flags & IFA_F_TENTATIVE)
     return;
-#endif
 
   /* IFA_LOCAL can be unset for IPv6 interfaces */
-  memcpy(&ifa.ip, RTA_DATA(a[IFA_LOCAL] ? : a[IFA_ADDRESS]), sizeof(ifa.ip));
-  ipa_ntoh(ifa.ip);
-  ifa.pxlen = i->ifa_prefixlen;
-  if (i->ifa_prefixlen > BITS_PER_IP_ADDRESS)
+  ifa.ip = rta_get_ipa(a[IFA_LOCAL] ? : a[IFA_ADDRESS]);
+
+  if (i->ifa_prefixlen > IP6_MAX_PREFIX_LENGTH)
     {
       log(L_ERR "KIF: Invalid prefix length for interface %s: %d", ifi->name, i->ifa_prefixlen);
       new = 0;
     }
-  if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS)
+  if (i->ifa_prefixlen == IP6_MAX_PREFIX_LENGTH)
     {
-      ip_addr addr;
-      memcpy(&addr, RTA_DATA(a[IFA_ADDRESS]), sizeof(addr));
-      ipa_ntoh(addr);
-      ifa.prefix = ifa.brd = addr;
+      ifa.brd = rta_get_ipa(a[IFA_ADDRESS]);
+      net_fill_ip6(&ifa.prefix, rta_get_ip6(a[IFA_ADDRESS]), i->ifa_prefixlen);
 
       /* It is either a host address or a peer address */
-      if (ipa_equal(ifa.ip, addr))
+      if (ipa_equal(ifa.ip, ifa.brd))
 	ifa.flags |= IA_HOST;
       else
 	{
 	  ifa.flags |= IA_PEER;
-	  ifa.opposite = addr;
+	  ifa.opposite = ifa.brd;
 	}
     }
   else
     {
-      ip_addr netmask = ipa_mkmask(ifa.pxlen);
-      ifa.prefix = ipa_and(ifa.ip, netmask);
-      ifa.brd = ipa_or(ifa.ip, ipa_not(netmask));
-      if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS - 1)
-	ifa.opposite = ipa_opposite_m1(ifa.ip);
+      net_fill_ip6(&ifa.prefix, ipa_to_ip6(ifa.ip), i->ifa_prefixlen);
+      net_normalize(&ifa.prefix);
 
-#ifndef IPV6
-      if (i->ifa_prefixlen == BITS_PER_IP_ADDRESS - 2)
-	ifa.opposite = ipa_opposite_m2(ifa.ip);
-
-      if ((ifi->flags & IF_BROADCAST) && a[IFA_BROADCAST])
-	{
-	  ip_addr xbrd;
-	  memcpy(&xbrd, RTA_DATA(a[IFA_BROADCAST]), sizeof(xbrd));
-	  ipa_ntoh(xbrd);
-	  if (ipa_equal(xbrd, ifa.prefix) || ipa_equal(xbrd, ifa.brd))
-	    ifa.brd = xbrd;
-	  else if (ifi->flags & IF_TMP_DOWN) /* Complain only during the first scan */
-	    log(L_ERR "KIF: Invalid broadcast address %I for %s", xbrd, ifi->name);
-	}
-#endif
+      if (i->ifa_prefixlen == IP6_MAX_PREFIX_LENGTH - 1)
+	ifa.opposite = ipa_opposite_m1(ifa.ip);
     }
 
   scope = ipa_classify(ifa.ip);
@@ -780,10 +860,10 @@ nl_parse_addr(struct nlmsghdr *h, int scan)
     }
   ifa.scope = scope & IADDR_SCOPE_MASK;
 
-  DBG("KIF: IF%d(%s): %s IPA %I, flg %x, net %I/%d, brd %I, opp %I\n",
+  DBG("KIF: IF%d(%s): %s IPA %I, flg %x, net %N, brd %I, opp %I\n",
       ifi->index, ifi->name,
       new ? "added" : "removed",
-      ifa.ip, ifa.flags, ifa.prefix, ifa.pxlen, ifa.brd, ifa.opposite);
+      ifa.ip, ifa.flags, ifa.prefix, ifa.brd, ifa.opposite);
 
   if (new)
     ifa_update(&ifa);
@@ -794,6 +874,26 @@ nl_parse_addr(struct nlmsghdr *h, int scan)
     if_end_partial_update(ifi);
 }
 
+static void
+nl_parse_addr(struct nlmsghdr *h, int scan)
+{
+  struct ifaddrmsg *i;
+
+  if (!(i = nl_checkin(h, sizeof(*i))))
+    return;
+
+  int new = (h->nlmsg_type == RTM_NEWADDR);
+
+  switch (i->ifa_family)
+    {
+      case AF_INET:
+	return nl_parse_addr4(i, scan, new);
+
+      case AF_INET6:
+	return nl_parse_addr6(i, scan, new);
+    }
+}
+
 void
 kif_do_scan(struct kif_proto *p UNUSED)
 {
@@ -808,7 +908,14 @@ kif_do_scan(struct kif_proto *p UNUSED)
     else
       log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
 
-  nl_request_dump(BIRD_AF, RTM_GETADDR);
+  nl_request_dump(AF_INET, RTM_GETADDR);
+  while (h = nl_get_scan())
+    if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
+      nl_parse_addr(h, 1);
+    else
+      log(L_DEBUG "nl_scan_ifaces: Unknown packet received (type=%d)", h->nlmsg_type);
+
+  nl_request_dump(AF_INET6, RTM_GETADDR);
   while (h = nl_get_scan())
     if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
       nl_parse_addr(h, 1);
@@ -830,10 +937,10 @@ krt_table_id(struct krt_proto *p)
 
 static HASH(struct krt_proto) nl_table_map;
 
-#define RTH_FN(k)	u32_hash(k)
-#define RTH_EQ(k1,k2)	k1 == k2
-#define RTH_KEY(p)	krt_table_id(p)
-#define RTH_NEXT(p)	p->sys.hash_next
+#define RTH_KEY(p)		p->af, krt_table_id(p)
+#define RTH_NEXT(p)		p->sys.hash_next
+#define RTH_EQ(a1,i1,a2,i2)	a1 == a2 && i1 == i2
+#define RTH_FN(a,i)		a ^ u32_hash(i)
 
 #define RTH_REHASH		rth_rehash
 #define RTH_PARAMS		/8, *2, 2, 2, 6, 20
@@ -880,27 +987,31 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int d
   eattr *ea;
   net *net = e->net;
   rta *a = e->attrs;
+  int bufsize = 128 + KRT_METRICS_MAX*8 + nh_bufsize(a->nexthops);
   u32 priority = 0;
 
   struct {
     struct nlmsghdr h;
     struct rtmsg r;
-    char buf[128 + KRT_METRICS_MAX*8 + nh_bufsize(a->nexthops)];
-  } r;
+    char buf[0];
+  } *r;
+
+  int rsize = sizeof(*r) + bufsize;
+  r = alloca(rsize);
 
-  DBG("nl_send_route(%I/%d,op=%x)\n", net->n.prefix, net->n.pxlen, op);
+  DBG("nl_send_route(%N,op=%x)\n", net->n.addr, op);
 
-  bzero(&r.h, sizeof(r.h));
-  bzero(&r.r, sizeof(r.r));
-  r.h.nlmsg_type = op ? RTM_NEWROUTE : RTM_DELROUTE;
-  r.h.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
-  r.h.nlmsg_flags = op | NLM_F_REQUEST | NLM_F_ACK;
+  bzero(&r->h, sizeof(r->h));
+  bzero(&r->r, sizeof(r->r));
+  r->h.nlmsg_type = op ? RTM_NEWROUTE : RTM_DELROUTE;
+  r->h.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtmsg));
+  r->h.nlmsg_flags = op | NLM_F_REQUEST | NLM_F_ACK;
 
-  r.r.rtm_family = BIRD_AF;
-  r.r.rtm_dst_len = net->n.pxlen;
-  r.r.rtm_protocol = RTPROT_BIRD;
-  r.r.rtm_scope = RT_SCOPE_NOWHERE;
-  nl_add_attr_ipa(&r.h, sizeof(r), RTA_DST, net->n.prefix);
+  r->r.rtm_family = p->af;
+  r->r.rtm_dst_len = net_pxlen(net->n.addr);
+  r->r.rtm_protocol = RTPROT_BIRD;
+  r->r.rtm_scope = RT_SCOPE_UNIVERSE;
+  nl_add_attr_ipa(&r->h, rsize, RTA_DST, net_prefix(net->n.addr));
 
   /*
    * Strange behavior for RTM_DELROUTE:
@@ -910,9 +1021,9 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int d
    */
 
   if (krt_table_id(p) < 256)
-    r.r.rtm_table = krt_table_id(p);
+    r->r.rtm_table = krt_table_id(p);
   else
-    nl_add_attr_u32(&r.h, sizeof(r), RTA_TABLE, krt_table_id(p));
+    nl_add_attr_u32(&r->h, rsize, RTA_TABLE, krt_table_id(p));
 
   if (a->source == RTS_DUMMY)
     priority = e->u.krt.metric;
@@ -922,7 +1033,7 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int d
     priority = ea->u.data;
 
   if (priority)
-    nl_add_attr_u32(&r.h, sizeof(r), RTA_PRIORITY, priority);
+    nl_add_attr_u32(&r->h, sizeof(r), RTA_PRIORITY, priority);
 
   /* For route delete, we do not specify remaining route attributes */
   if (op == NL_OP_DELETE)
@@ -930,15 +1041,15 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int d
 
   /* Default scope is LINK for device routes, UNIVERSE otherwise */
   if (ea = ea_find(eattrs, EA_KRT_SCOPE))
-    r.r.rtm_scope = ea->u.data;
+    r->r.rtm_scope = ea->u.data;
   else
-    r.r.rtm_scope = (dest == RTD_DEVICE) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE;
+    r->r.rtm_scope = (dest == RTD_DEVICE) ? RT_SCOPE_LINK : RT_SCOPE_UNIVERSE;
 
   if (ea = ea_find(eattrs, EA_KRT_PREFSRC))
-    nl_add_attr_ipa(&r.h, sizeof(r), RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data);
+    nl_add_attr_ipa(&r->h, rsize, RTA_PREFSRC, *(ip_addr *)ea->u.ptr->data);
 
   if (ea = ea_find(eattrs, EA_KRT_REALM))
-    nl_add_attr_u32(&r.h, sizeof(r), RTA_FLOW, ea->u.data);
+    nl_add_attr_u32(&r->h, rsize, RTA_FLOW, ea->u.data);
 
 
   u32 metrics[KRT_METRICS_MAX];
@@ -953,7 +1064,7 @@ nl_send_route(struct krt_proto *p, rte *e, struct ea_list *eattrs, int op, int d
   }
 
   if (metrics[0])
-    nl_add_metrics(&r.h, sizeof(r), metrics, KRT_METRICS_MAX);
+    nl_add_metrics(&r->h, rsize, metrics, KRT_METRICS_MAX);
 
 
 dest:
@@ -961,26 +1072,26 @@ dest:
   switch (dest)
     {
     case RTD_ROUTER:
-      r.r.rtm_type = RTN_UNICAST;
-      nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, iface->index);
-      nl_add_attr_ipa(&r.h, sizeof(r), RTA_GATEWAY, gw);
+      r->r.rtm_type = RTN_UNICAST;
+      nl_add_attr_u32(&r->h, rsize, RTA_OIF, iface->index);
+      nl_add_attr_ipa(&r->h, rsize, RTA_GATEWAY, gw);
       break;
     case RTD_DEVICE:
-      r.r.rtm_type = RTN_UNICAST;
-      nl_add_attr_u32(&r.h, sizeof(r), RTA_OIF, iface->index);
+      r->r.rtm_type = RTN_UNICAST;
+      nl_add_attr_u32(&r->h, rsize, RTA_OIF, iface->index);
       break;
     case RTD_BLACKHOLE:
-      r.r.rtm_type = RTN_BLACKHOLE;
+      r->r.rtm_type = RTN_BLACKHOLE;
       break;
     case RTD_UNREACHABLE:
-      r.r.rtm_type = RTN_UNREACHABLE;
+      r->r.rtm_type = RTN_UNREACHABLE;
       break;
     case RTD_PROHIBIT:
-      r.r.rtm_type = RTN_PROHIBIT;
+      r->r.rtm_type = RTN_PROHIBIT;
       break;
     case RTD_MULTIPATH:
-      r.r.rtm_type = RTN_UNICAST;
-      nl_add_multipath(&r.h, sizeof(r), a->nexthops);
+      r->r.rtm_type = RTN_UNICAST;
+      nl_add_multipath(&r->h, rsize, a->nexthops);
       break;
     case RTD_NONE:
       break;
@@ -989,7 +1100,7 @@ dest:
     }
 
   /* Ignore missing for DELETE */
-  return nl_exchange(&r.h, (op == NL_OP_DELETE));
+  return nl_exchange(&r->h, (op == NL_OP_DELETE));
 }
 
 static inline int
@@ -1137,9 +1248,9 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
   struct rtattr *a[BIRD_RTA_MAX];
   int new = h->nlmsg_type == RTM_NEWROUTE;
 
-  ip_addr dst = IPA_NONE;
+  net_addr dst;
   u32 oif = ~0;
-  u32 table;
+  u32 table_id;
   u32 priority = 0;
   u32 def_scope = RT_SCOPE_UNIVERSE;
   int src;
@@ -1149,47 +1260,48 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
 
   switch (i->rtm_family)
     {
-#ifndef IPV6
-      case AF_INET:
-	if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want4, a, sizeof(a)))
-	  return;
-	break;
-#else
-      case AF_INET6:
-	if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want6, a, sizeof(a)))
-	  return;
-	break;
-#endif
-      default:
+    case AF_INET:
+      if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want4, a, sizeof(a)))
 	return;
-    }
 
-  if (a[RTA_DST])
-    {
-      memcpy(&dst, RTA_DATA(a[RTA_DST]), sizeof(dst));
-      ipa_ntoh(dst);
+      if (a[RTA_DST])
+	net_fill_ip4(&dst, rta_get_ip4(a[RTA_DST]), i->rtm_dst_len);
+      else
+	net_fill_ip4(&dst, IP4_NONE, 0);
+      break;
+
+    case AF_INET6:
+      if (!nl_parse_attrs(RTM_RTA(i), rtm_attr_want6, a, sizeof(a)))
+	return;
+
+      if (a[RTA_DST])
+	net_fill_ip6(&dst, rta_get_ip6(a[RTA_DST]), i->rtm_dst_len);
+      else
+	net_fill_ip6(&dst, IP6_NONE, 0);
+      break;
+
+    default:
+      return;
     }
 
   if (a[RTA_OIF])
     oif = rta_get_u32(a[RTA_OIF]);
 
   if (a[RTA_TABLE])
-    table = rta_get_u32(a[RTA_TABLE]);
+    table_id = rta_get_u32(a[RTA_TABLE]);
   else
-    table = i->rtm_table;
+    table_id = i->rtm_table;
 
-  p = HASH_FIND(nl_table_map, RTH, table); /* Do we know this table? */
-  DBG("KRT: Got %I/%d, type=%d, oif=%d, table=%d, prid=%d, proto=%s\n", dst, i->rtm_dst_len, i->rtm_type, oif, table, i->rtm_protocol, p ? p->p.name : "(none)");
+  /* Do we know this table? */
+  p = HASH_FIND(nl_table_map, RTH, i->rtm_family, table_id);
   if (!p)
     SKIP("unknown table %d\n", table);
 
-#ifdef IPV6
   if (a[RTA_IIF])
     SKIP("IIF set\n");
-#else
+
   if (i->rtm_tos != 0)			/* We don't support TOS */
     SKIP("TOS %02x\n", i->rtm_tos);
-#endif
 
   if (s->scan && !new)
     SKIP("RTM_DELROUTE in scan\n");
@@ -1197,7 +1309,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
   if (a[RTA_PRIORITY])
     priority = rta_get_u32(a[RTA_PRIORITY]);
 
-  int c = ipa_classify_net(dst);
+  int c = net_classify(&dst);
   if ((c < 0) || !(c & IADDR_HOST) || ((c & IADDR_SCOPE_MASK) <= SCOPE_LINK))
     SKIP("strange class/scope\n");
 
@@ -1225,7 +1337,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
       src = KRT_SRC_ALIEN;
     }
 
-  net *net = net_get(p->p.table, dst, i->rtm_dst_len);
+  net *net = net_get(p->p.main_channel->table, &dst);
 
   if (s->net && !nl_mergable_route(s, net, p, priority, i->rtm_type))
     nl_announce_route(s);
@@ -1246,8 +1358,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
 	  ra->nexthops = nl_parse_multipath(p, a[RTA_MULTIPATH]);
 	  if (!ra->nexthops)
 	    {
-	      log(L_ERR "KRT: Received strange multipath route %I/%d",
-		  net->n.prefix, net->n.pxlen);
+	      log(L_ERR "KRT: Received strange multipath route %N", net->n.addr);
 	      return;
 	    }
 
@@ -1257,30 +1368,26 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
       ra->iface = if_find_by_index(oif);
       if (!ra->iface)
 	{
-	  log(L_ERR "KRT: Received route %I/%d with unknown ifindex %u",
-	      net->n.prefix, net->n.pxlen, oif);
+	  log(L_ERR "KRT: Received route %N with unknown ifindex %u", net->n.addr, oif);
 	  return;
 	}
 
       if (a[RTA_GATEWAY])
 	{
-	  neighbor *ng;
 	  ra->dest = RTD_ROUTER;
-	  memcpy(&ra->gw, RTA_DATA(a[RTA_GATEWAY]), sizeof(ra->gw));
-	  ipa_ntoh(ra->gw);
+	  ra->gw = rta_get_ipa(a[RTA_GATEWAY]);
 
-#ifdef IPV6
 	  /* Silently skip strange 6to4 routes */
-	  if (ipa_in_net(ra->gw, IPA_NONE, 96))
+	  const net_addr_ip6 sit = NET_ADDR_IP6(IP6_NONE, 96);
+	  if ((i->rtm_family == AF_INET6) && ipa_in_netX(ra->gw, (net_addr *) &sit))
 	    return;
-#endif
 
-	  ng = neigh_find2(&p->p, &ra->gw, ra->iface,
-			   (i->rtm_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
-	  if (!ng || (ng->scope == SCOPE_HOST))
+	  neighbor *nbr;
+	  nbr = neigh_find2(&p->p, &ra->gw, ra->iface,
+			    (i->rtm_flags & RTNH_F_ONLINK) ? NEF_ONLINK : 0);
+	  if (!nbr || (nbr->scope == SCOPE_HOST))
 	    {
-	      log(L_ERR "KRT: Received route %I/%d with strange next-hop %I",
-		  net->n.prefix, net->n.pxlen, ra->gw);
+	      log(L_ERR "KRT: Received route %N with strange next-hop %I", net->n.addr, ra->gw);
 	      return;
 	    }
 	}
@@ -1321,9 +1428,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
 
   if (a[RTA_PREFSRC])
     {
-      ip_addr ps;
-      memcpy(&ps, RTA_DATA(a[RTA_PREFSRC]), sizeof(ps));
-      ipa_ntoh(ps);
+      ip_addr ps = rta_get_ipa(a[RTA_PREFSRC]);
 
       ea_list *ea = lp_alloc(s->pool, sizeof(ea_list) + sizeof(eattr));
       ea->next = ra->eattrs;
@@ -1359,8 +1464,7 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
 
       if (nl_parse_metrics(a[RTA_METRICS], metrics, ARRAY_SIZE(metrics)) < 0)
         {
-	  log(L_ERR "KRT: Received route %I/%d with strange RTA_METRICS attribute",
-	      net->n.prefix, net->n.pxlen);
+	  log(L_ERR "KRT: Received route %N with strange RTA_METRICS attribute", net->n.addr);
 	  return;
 	}
 
@@ -1422,15 +1526,22 @@ krt_do_scan(struct krt_proto *p UNUSED)	/* CONFIG_ALL_TABLES_AT_ONCE => p is NUL
   struct nlmsghdr *h;
   struct nl_parse_state s;
 
-  nl_parse_begin(&s, 1, krt_ecmp6(p));
-
-  nl_request_dump(BIRD_AF, RTM_GETROUTE);
+  nl_parse_begin(&s, 1, 0);
+  nl_request_dump(AF_INET, RTM_GETROUTE);
   while (h = nl_get_scan())
     if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
       nl_parse_route(&s, h);
     else
       log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
+  nl_parse_end(&s);
 
+  nl_parse_begin(&s, 1, 1);
+  nl_request_dump(AF_INET6, RTM_GETROUTE);
+  while (h = nl_get_scan())
+    if (h->nlmsg_type == RTM_NEWROUTE || h->nlmsg_type == RTM_DELROUTE)
+      nl_parse_route(&s, h);
+    else
+      log(L_DEBUG "nl_scan_fire: Unknown packet received (type=%d)", h->nlmsg_type);
   nl_parse_end(&s);
 }
 
@@ -1553,11 +1664,10 @@ nl_open_async(void)
 
   bzero(&sa, sizeof(sa));
   sa.nl_family = AF_NETLINK;
-#ifdef IPV6
-  sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE;
-#else
-  sa.nl_groups = RTMGRP_LINK | RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE;
-#endif
+  sa.nl_groups = RTMGRP_LINK |
+    RTMGRP_IPV4_IFADDR | RTMGRP_IPV4_ROUTE |
+    RTMGRP_IPV6_IFADDR | RTMGRP_IPV6_ROUTE;
+
   if (bind(fd, (struct sockaddr *) &sa, sizeof(sa)) < 0)
     {
       log(L_ERR "Unable to bind asynchronous rtnetlink socket: %m");
@@ -1591,7 +1701,7 @@ krt_sys_io_init(void)
 int
 krt_sys_start(struct krt_proto *p)
 {
-  struct krt_proto *old = HASH_FIND(nl_table_map, RTH, krt_table_id(p));
+  struct krt_proto *old = HASH_FIND(nl_table_map, RTH, p->af, krt_table_id(p));
 
   if (old)
     {