From 702c04fbef222e802ca4dfac645dc75ede522db6 Mon Sep 17 00:00:00 2001
From: Maria Matejka <mq@ucw.cz>
Date: Wed, 4 May 2022 12:41:54 +0200
Subject: [PATCH] Removing the route scope attribute. Use custom attributes
 instead.

The route scope attribute was used for simple user route marking. As
there is a better tool for this (custom attributes), the old and limited
way can be dropped.
---
 doc/bird.sgml          | 8 --------
 filter/config.Y        | 1 -
 filter/data.h          | 1 -
 filter/f-inst.c        | 5 -----
 filter/test.conf2      | 6 ------
 lib/route.h            | 1 -
 nest/rt-attr.c         | 8 +++-----
 nest/rt-dev.c          | 1 -
 proto/babel/babel.c    | 2 --
 proto/bgp/packets.c    | 1 -
 proto/ospf/rt.c        | 1 -
 proto/perf/perf.c      | 1 -
 proto/rip/rip.c        | 1 -
 proto/rpki/rpki.c      | 1 -
 proto/static/static.c  | 1 -
 sysdep/bsd/krt-sock.c  | 1 -
 sysdep/linux/netlink.c | 1 -
 17 files changed, 3 insertions(+), 38 deletions(-)

diff --git a/doc/bird.sgml b/doc/bird.sgml
index a71624aa..aa058b37 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -1723,14 +1723,6 @@ Common route attributes are:
 	primary key of the routing table. Read-only. (See the <ref id="routes"
 	name="chapter about routes">.)
 
-	<tag><label id="rta-scope"><m/enum/ scope</tag>
-	The scope of the route. Possible values: <cf/SCOPE_HOST/ for routes
-	local to this host, <cf/SCOPE_LINK/ for those specific for a physical
-	link, <cf/SCOPE_SITE/ and <cf/SCOPE_ORGANIZATION/ for private routes and
-	<cf/SCOPE_UNIVERSE/ for globally visible routes. This attribute is not
-	interpreted by BIRD and can be used to mark routes in filters. The
-	default value for new routes is <cf/SCOPE_UNIVERSE/.
-
 	<tag><label id="rta-preference"><m/int/ preference</tag>
 	Preference of the route.
 
diff --git a/filter/config.Y b/filter/config.Y
index 7dcdb779..6af39c10 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -766,7 +766,6 @@ static_attr:
  | NET     { $$ = f_new_static_attr(T_NET,	  SA_NET,	1); }
  | PROTO   { $$ = f_new_static_attr(T_STRING,     SA_PROTO,	1); }
  | SOURCE  { $$ = f_new_static_attr(T_ENUM_RTS,   SA_SOURCE,	1); }
- | SCOPE   { $$ = f_new_static_attr(T_ENUM_SCOPE, SA_SCOPE,	0); }
  | DEST    { $$ = f_new_static_attr(T_ENUM_RTD,   SA_DEST,	0); }
  | IFNAME  { $$ = f_new_static_attr(T_STRING,     SA_IFNAME,	0); }
  | IFINDEX { $$ = f_new_static_attr(T_INT,        SA_IFINDEX,	1); }
diff --git a/filter/data.h b/filter/data.h
index a0a164ed..49b29499 100644
--- a/filter/data.h
+++ b/filter/data.h
@@ -26,7 +26,6 @@ enum f_sa_code {
   SA_NET,
   SA_PROTO,
   SA_SOURCE,
-  SA_SCOPE,
   SA_DEST,
   SA_IFNAME,
   SA_IFINDEX,
diff --git a/filter/f-inst.c b/filter/f-inst.c
index 7158d22e..5eacc716 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -537,7 +537,6 @@
       case SA_NET:	RESULT(sa.type, net, (*fs->rte)->net->n.addr); break;
       case SA_PROTO:	RESULT(sa.type, s, (*fs->rte)->src->proto->name); break;
       case SA_SOURCE:	RESULT(sa.type, i, rta->source); break;
-      case SA_SCOPE:	RESULT(sa.type, i, rta->scope); break;
       case SA_DEST:	RESULT(sa.type, i, rta->dest); break;
       case SA_IFNAME:	RESULT(sa.type, s, rta->nh.iface ? rta->nh.iface->name : ""); break;
       case SA_IFINDEX:	RESULT(sa.type, i, rta->nh.iface ? rta->nh.iface->index : 0); break;
@@ -579,10 +578,6 @@
 	}
 	break;
 
-      case SA_SCOPE:
-	rta->scope = v1.val.i;
-	break;
-
       case SA_DEST:
 	{
 	  int i = v1.val.i;
diff --git a/filter/test.conf2 b/filter/test.conf2
index e95f9563..9fc8330f 100644
--- a/filter/test.conf2
+++ b/filter/test.conf2
@@ -38,12 +38,6 @@ protocol static {
 			print from;
 			from = 1.2.3.4;
 			print from;
-			print scope;
-			scope = SCOPE_HOST;
-			print scope;
-			if !(scope ~ [ SCOPE_HOST, SCOPE_SITE ]) then {
-				print "Failed in test";
-			}
 
 			preference = 15;
 			print preference;
diff --git a/lib/route.h b/lib/route.h
index e02c63b3..40ba150d 100644
--- a/lib/route.h
+++ b/lib/route.h
@@ -86,7 +86,6 @@ typedef struct rta {
   struct hostentry *hostentry;		/* Hostentry for recursive next-hops */
   u16 cached:1;				/* Are attributes cached? */
   u16 source:7;				/* Route source (RTS_...) */
-  u16 scope:4;				/* Route scope (SCOPE_... -- see ip.h) */
   u16 dest:4;				/* Route destination type (RTD_...) */
   struct nexthop nh;			/* Next hop */
 } rta;
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index 87f54b0d..a892bfd5 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -1235,7 +1235,6 @@ rta_hash(rta *a)
 #define BMIX(f) mem_hash_mix_num(&h, a->f);
   MIX(hostentry);
   BMIX(source);
-  BMIX(scope);
   BMIX(dest);
 #undef MIX
 
@@ -1246,7 +1245,6 @@ static inline int
 rta_same(rta *x, rta *y)
 {
   return (x->source == y->source &&
-	  x->scope == y->scope &&
 	  x->dest == y->dest &&
 	  x->hostentry == y->hostentry &&
 	  nexthop_same(&(x->nh), &(y->nh)) &&
@@ -1396,8 +1394,8 @@ rta_dump(rta *a)
 			 "RTS_OSPF_EXT2", "RTS_BGP", "RTS_PIPE", "RTS_BABEL" };
   static char *rtd[] = { "", " DEV", " HOLE", " UNREACH", " PROHIBIT" };
 
-  debug("uc=%d %s %s%s h=%04x",
-	a->uc, rts[a->source], ip_scope_text(a->scope),
+  debug("uc=%d %s %s h=%04x",
+	a->uc, rts[a->source],
 	rtd[a->dest], a->hash_key);
   if (!a->cached)
     debug(" !CACHED");
@@ -1443,7 +1441,7 @@ rta_dump_all(void)
 void
 rta_show(struct cli *c, rta *a)
 {
-  cli_printf(c, -1008, "\tType: %s %s", rta_src_names[a->source], ip_scope_text(a->scope));
+  cli_printf(c, -1008, "\tType: %s", rta_src_names[a->source]);
 
   for(ea_list *eal = a->eattrs; eal; eal=eal->next)
     for(int i=0; i<eal->count; i++)
diff --git a/nest/rt-dev.c b/nest/rt-dev.c
index 696b37b8..ffd5afd5 100644
--- a/nest/rt-dev.c
+++ b/nest/rt-dev.c
@@ -84,7 +84,6 @@ dev_ifa_notify(struct proto *P, uint flags, struct ifa *ad)
 
       rta a0 = {
 	.source = RTS_DEVICE,
-	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
 	.nh.iface = ad->iface,
       };
diff --git a/proto/babel/babel.c b/proto/babel/babel.c
index f4503b99..cd221c7b 100644
--- a/proto/babel/babel.c
+++ b/proto/babel/babel.c
@@ -659,7 +659,6 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
 
     rta a0 = {
       .source = RTS_BABEL,
-      .scope = SCOPE_UNIVERSE,
       .dest = RTD_UNICAST,
       .nh.gw = r->next_hop,
       .nh.iface = r->neigh->ifa->iface,
@@ -685,7 +684,6 @@ babel_announce_rte(struct babel_proto *p, struct babel_entry *e)
     /* Unreachable */
     rta a0 = {
       .source = RTS_BABEL,
-      .scope = SCOPE_UNIVERSE,
       .dest = RTD_UNREACHABLE,
     };
 
diff --git a/proto/bgp/packets.c b/proto/bgp/packets.c
index 9760ebee..62d60e9a 100644
--- a/proto/bgp/packets.c
+++ b/proto/bgp/packets.c
@@ -2475,7 +2475,6 @@ bgp_decode_nlri(struct bgp_parse_state *s, u32 afi, byte *nlri, uint len, ea_lis
     a = allocz(RTA_MAX_SIZE);
 
     a->source = RTS_BGP;
-    a->scope = SCOPE_UNIVERSE;
     a->eattrs = ea;
 
     ea_set_attr_data(&a->eattrs, &ea_gen_from, 0, &s->proto->remote_ip, sizeof(ip_addr));
diff --git a/proto/ospf/rt.c b/proto/ospf/rt.c
index 3d8cf22c..ddc5b162 100644
--- a/proto/ospf/rt.c
+++ b/proto/ospf/rt.c
@@ -2054,7 +2054,6 @@ again1:
     {
       rta a0 = {
 	.source = nf->n.type,
-	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
 	.nh = *(nf->n.nhs),
       };
diff --git a/proto/perf/perf.c b/proto/perf/perf.c
index 7b18866c..47a2867d 100644
--- a/proto/perf/perf.c
+++ b/proto/perf/perf.c
@@ -144,7 +144,6 @@ perf_loop(void *data)
     if (!p->attrs_per_rte || !(i % p->attrs_per_rte)) {
       struct rta a0 = {
 	.source = RTS_PERF,
-	.scope = SCOPE_UNIVERSE,
 	.dest = RTD_UNICAST,
 	.nh.iface = p->ifa->iface,
 	.nh.gw = gw,
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index 7c097a92..f5442606 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -153,7 +153,6 @@ rip_announce_rte(struct rip_proto *p, struct rip_entry *en)
     /* Update */
     rta a0 = {
       .source = RTS_RIP,
-      .scope = SCOPE_UNIVERSE,
       .dest = RTD_UNICAST,
     };
 
diff --git a/proto/rpki/rpki.c b/proto/rpki/rpki.c
index 710764e2..af963f49 100644
--- a/proto/rpki/rpki.c
+++ b/proto/rpki/rpki.c
@@ -122,7 +122,6 @@ rpki_table_add_roa(struct rpki_cache *cache, struct channel *channel, const net_
 
   rta a0 = {
     .source = RTS_RPKI,
-    .scope = SCOPE_UNIVERSE,
     .dest = RTD_NONE,
   };
 
diff --git a/proto/static/static.c b/proto/static/static.c
index d4b1c5f3..ff833b16 100644
--- a/proto/static/static.c
+++ b/proto/static/static.c
@@ -56,7 +56,6 @@ static_announce_rte(struct static_proto *p, struct static_route *r)
   rta *a = allocz(RTA_MAX_SIZE);
   struct rte_src *src = static_get_source(p, r->index);
   a->source = RTS_STATIC;
-  a->scope = SCOPE_UNIVERSE;
   a->dest = r->dest;
   ea_set_attr_u32(&a->eattrs, &ea_gen_preference, 0, p->p.main_channel->preference);
 
diff --git a/sysdep/bsd/krt-sock.c b/sysdep/bsd/krt-sock.c
index 844b9f83..bc6b1839 100644
--- a/sysdep/bsd/krt-sock.c
+++ b/sysdep/bsd/krt-sock.c
@@ -521,7 +521,6 @@ krt_read_route(struct ks_msg *msg, struct krt_proto *p, int scan)
   rta a = {
     .src = p->p.main_source,
     .source = RTS_INHERIT,
-    .scope = SCOPE_UNIVERSE,
   };
 
   /* reject/blackhole routes have also set RTF_GATEWAY,
diff --git a/sysdep/linux/netlink.c b/sysdep/linux/netlink.c
index 23d41b56..c506c71c 100644
--- a/sysdep/linux/netlink.c
+++ b/sysdep/linux/netlink.c
@@ -1855,7 +1855,6 @@ nl_parse_route(struct nl_parse_state *s, struct nlmsghdr *h)
 
   rta *ra = lp_allocz(s->pool, RTA_MAX_SIZE);
   ra->source = RTS_INHERIT;
-  ra->scope = SCOPE_UNIVERSE;
 
   if (a[RTA_FLOW])
     s->rta_flow = rta_get_u32(a[RTA_FLOW]);