Add several experimental patches to the port.

Add special 'EXP' option (off by default) to use these patches.

Reviewed by:	az

5 files changed, 334 insertions, 3 deletions

diff --git a/net/bird/Makefile b/net/bird/Makefile
index 47e5dcb6a219..a2a862933526 100644
--- a/net/bird/Makefile
+++ b/net/bird/Makefile
@@ -3,7 +3,7 @@
 
 PORTNAME?=	bird
 PORTVERSION=	1.4.5
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	net
 MASTER_SITES=	ftp://bird.network.cz/pub/bird/ \
 		http://bird.mpls.in/distfiles/bird/
@@ -18,9 +18,10 @@ GNU_CONFIGURE=	yes
 CONFIGURE_ARGS+=	--localstatedir=/var
 USE_CSTD=	gnu89
 
-OPTIONS_DEFINE?=	FIREWALL AGG
+OPTIONS_DEFINE?=	FIREWALL AGG EXP
 FIREWALL_DESC=	Enable firewall protocol
 AGG_DESC=	Enable aggregation protocol (EXPERIMENTAL)
+EXP_DESC=	Enable some experimental patches
 NO_OPTIONS_SORT=	yes
 
 MAKE_JOBS_UNSAFE=	yes
@@ -33,6 +34,7 @@ PLIST_SUB?=	VER=""
 
 FIREWALL_EXTRA_PATCHES+=	${FILESDIR}/firewall_support.patch
 AGG_EXTRA_PATCHES+=	${FILESDIR}/agg_support.patch
+EXP_EXTRA_PATCHES+=	${FILESDIR}/exp-templates.patch ${FILESDIR}/exp-ll.patch ${FILESDIR}/exp-locks.patch
 
 .include <bsd.port.options.mk>
 
diff --git a/net/bird/files/exp-ll.patch b/net/bird/files/exp-ll.patch
new file mode 100644
index 000000000000..c7c24d0feb0e
--- /dev/null
+++ b/net/bird/files/exp-ll.patch
@@ -0,0 +1,164 @@
+From d4d9c7fb4c74485b603026aaa35a528160c87ed4 Mon Sep 17 00:00:00 2001
+From: "Alexander V. Chernikov" <melifaro@yandex-team.ru>
+Date: Fri, 19 Dec 2014 15:44:45 +0000
+Subject: [PATCH 2/3] Improve link-local nexthops handling for link-local
+ BGP-IPv6 sessions.
+
+---
+ doc/bird.sgml       |  9 +++++++++
+ proto/bgp/bgp.h     |  6 ++++++
+ proto/bgp/config.Y  |  8 +++++++-
+ proto/bgp/packets.c | 52 ++++++++++++++++++++++++++++++++++++++++++++++++----
+ 4 files changed, 70 insertions(+), 5 deletions(-)
+
+diff --git doc/bird.sgml doc/bird.sgml
+index e9e5920..2951f13 100644
+--- doc/bird.sgml
++++ doc/bird.sgml
+@@ -1668,6 +1668,15 @@ using the following configuration parameters:
+ 	local address should be used instead, like when the route is sent to an
+ 	interface with a different subnet. Default: disabled.
+ 
++	<tag>next hop lladdr both|only|empty</tag>
++	Different BGP-IPv6 implementations sends/receives link-local nexthops
++	for link-local BGP sessions in different formats. This option specifies
++	exact format understood by particular peer. <cf/both/ means that BIRD
++	sends both addresses in next-hop as link-local. <cf/only/ means that BIRD
++	sends single link-local address as next-hop. <cf/empty/ means that BIRD
++	sends empty global address and original link-local address as next-hop.
++	Default: <cf/empty/.
++
+ 	<tag>missing lladdr self|drop|ignore</tag>
+ 	Next Hop attribute in BGP-IPv6 sometimes contains just the global IPv6
+ 	address, but sometimes it has to contain both global and link-local IPv6
+diff --git proto/bgp/bgp.h proto/bgp/bgp.h
+index 0fd3a73..5a53559 100644
+--- proto/bgp/bgp.h
++++ proto/bgp/bgp.h
+@@ -51,6 +51,7 @@ struct bgp_config {
+   int allow_local_as;			/* Allow that number of local ASNs in incoming AS_PATHs */
+   int gr_mode;				/* Graceful restart mode (BGP_GR_*) */
+   unsigned gr_time;			/* Graceful restart timeout */
++  int nhop_lladdr;			/* Expected link-local nhop format, see NLL_* */
+   unsigned connect_retry_time;
+   unsigned hold_time, initial_hold_time;
+   unsigned keepalive_time;
+@@ -69,6 +70,11 @@ struct bgp_config {
+ #define MLL_DROP 2
+ #define MLL_IGNORE 3
+ 
++#define	NLL_BOTH 1
++#define NLL_ONLY 2
++#define	NLL_EMPTYGLOBAL 3
++#define	NLL_TRANSPARENT 4
++
+ #define GW_DIRECT 1
+ #define GW_RECURSIVE 2
+ 
+diff --git proto/bgp/config.Y proto/bgp/config.Y
+index d04c16d..5c9e826 100644
+--- proto/bgp/config.Y
++++ proto/bgp/config.Y
+@@ -26,7 +26,8 @@ CF_KEYWORDS(BGP, LOCAL, REMOTE, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY,
+ 	PREFER, OLDER, MISSING, LLADDR, DROP, IGNORE, ROUTE, REFRESH,
+ 	INTERPRET, COMMUNITIES, BGP_ORIGINATOR_ID, BGP_CLUSTER_LIST, IGP,
+ 	TABLE, GATEWAY, DIRECT, RECURSIVE, MED, TTL, SECURITY, DETERMINISTIC,
+-	SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX, GRACEFUL, RESTART, AWARE)
++	SECONDARY, ALLOW, BFD, ADD, PATHS, RX, TX, GRACEFUL, RESTART, AWARE,
++	BOTH)
+ 
+ CF_GRAMMAR
+ 
+@@ -53,6 +54,7 @@ bgp_proto_start: proto_start BGP {
+      BGP_CFG->gr_mode = BGP_GR_AWARE;
+      BGP_CFG->gr_time = 120;
+      BGP_CFG->remote_port = BGP_PORT;
++     BGP_CFG->nhop_lladdr = NLL_EMPTYGLOBAL;
+  }
+  ;
+ 
+@@ -88,6 +90,10 @@ bgp_proto:
+  | bgp_proto MULTIHOP expr ';' { BGP_CFG->multihop = $3; if (($3<1) || ($3>255)) cf_error("Multihop must be in range 1-255"); }
+  | bgp_proto NEXT HOP SELF ';' { BGP_CFG->next_hop_self = 1; BGP_CFG->next_hop_keep = 0; }
+  | bgp_proto NEXT HOP KEEP ';' { BGP_CFG->next_hop_keep = 1; BGP_CFG->next_hop_self = 0; }
++ | bgp_proto NEXT HOP LLADDR BOTH ';' { BGP_CFG->nhop_lladdr = NLL_BOTH;  }
++ | bgp_proto NEXT HOP LLADDR ONLY ';' { BGP_CFG->nhop_lladdr = NLL_ONLY;  }
++ | bgp_proto NEXT HOP LLADDR EMPTY  ';' { BGP_CFG->nhop_lladdr = NLL_EMPTYGLOBAL;  }
++ | bgp_proto NEXT HOP LLADDR TRANSPARENT ';' { BGP_CFG->nhop_lladdr = NLL_TRANSPARENT;  }
+  | bgp_proto MISSING LLADDR SELF ';' { BGP_CFG->missing_lladdr = MLL_SELF; }
+  | bgp_proto MISSING LLADDR DROP ';' { BGP_CFG->missing_lladdr = MLL_DROP; }
+  | bgp_proto MISSING LLADDR IGNORE ';' { BGP_CFG->missing_lladdr = MLL_IGNORE; }
+diff --git proto/bgp/packets.c proto/bgp/packets.c
+index 0b9de8c..0744fab 100644
+--- proto/bgp/packets.c
++++ proto/bgp/packets.c
+@@ -522,8 +522,36 @@ bgp_create_update(struct bgp_conn *conn, byte *buf)
+ 	  *tmp++ = BGP_AF_IPV6;
+ 	  *tmp++ = 1;
+ 
+-	  if (ipa_has_link_scope(ip))
+-	    ip = IPA_NONE;
++	  /*
++	   * Handle different nexthops schemes for link-local BGP:
++	   * Possible cases:
++	   * [ ::, fe80::XX ]: bird default
++	   * [ fe80::XX, fe80::XX ]: used in JunoOS
++	   * [ fe80:XX ]: used by some Huawei implementations
++	   */
++	  if ((ipa_zero(ip) || ipa_has_link_scope(ip)) && ipa_nonzero(ip_ll))
++	    {
++	      switch (p->cf->nhop_lladdr)
++		{
++		case NLL_EMPTYGLOBAL:
++		    /* Leave link-local, but reset global address to :: */
++		    if (ipa_has_link_scope(ip))
++		      ip = IPA_NONE;
++		   break;
++		case NLL_ONLY:
++		   /* Link-local address only */
++		   ip = ip_ll;
++		   ip_ll = IPA_NONE;
++		   break;
++		 case NLL_BOTH:
++		   /* Both addresses are link-local */
++		   ip = ip_ll;
++		   break;
++		 case NLL_TRANSPARENT:
++		   /* Leave as is */
++		   break;
++		}
++	    }
+ 
+ 	  if (ipa_nonzero(ip_ll))
+ 	    {
+@@ -1033,9 +1061,25 @@ bgp_set_next_hop(struct bgp_proto *p, rta *a)
+ #ifdef IPV6
+   int second = (nh->u.ptr->length == NEXT_HOP_LENGTH) && ipa_nonzero(nexthop[1]);
+ 
+-  /* First address should not be link-local, but may be zero in direct mode */
++  /*
++   * There are different ways of sending link-local nexthop address:
++   * some implementation pass single entry with link-local address, e.g. [ fe80::xx ]
++   * some may pass dual nexthops, e.g. [ aa::bb fe80::xx ].
++   *
++   * We need to convert both cases to internally used [ :: fe80:xx ] scheme.
++   */
+   if (ipa_has_link_scope(*nexthop))
+-    *nexthop = IPA_NONE;
++    {
++      if (second)
++        *nexthop = IPA_NONE;
++      else
++        {
++	  /* We have received single link-local nexthop */
++	  nexthop = alloca(sizeof(ip_addr) * 2);
++          *nexthop = IPA_NONE;
++	  nexthop[1] = *((ip_addr *) nh->u.ptr->data);
++	}
++    }
+ #else
+   int second = 0;
+ #endif
+-- 
+2.1.2
+
diff --git a/net/bird/files/exp-locks.patch b/net/bird/files/exp-locks.patch
new file mode 100644
index 000000000000..22d34aa20757
--- /dev/null
+++ b/net/bird/files/exp-locks.patch
@@ -0,0 +1,25 @@
+From 72eb25c26107f31bcf6d8cd02e47ec16a69082ce Mon Sep 17 00:00:00 2001
+From: "Alexander V. Chernikov" <melifaro@yandex-team.ru>
+Date: Wed, 21 Jan 2015 19:12:33 +0000
+Subject: [PATCH 3/3] Locks fix from list.
+
+---
+ nest/locks.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git nest/locks.c nest/locks.c
+index 7044d6a..8ee5898 100644
+--- nest/locks.c
++++ nest/locks.c
+@@ -68,7 +68,7 @@ olock_free(resource *r)
+ 	  DBG("olock: -> %p becomes locked\n", n);
+ 	  q = SKIP_BACK(struct object_lock, n, n);
+ 	  rem_node(n);
+-	  add_tail_list(&l->waiters, &q->waiters);
++	  add_tail_list(&q->waiters, &l->waiters);
+ 	  q->state = OLOCK_STATE_EVENT;
+ 	  add_head(&olock_list, n);
+ 	  ev_schedule(olock_event);
+-- 
+2.1.2
+
diff --git a/net/bird/files/exp-templates.patch b/net/bird/files/exp-templates.patch
new file mode 100644
index 000000000000..f06ec7b6929b
--- /dev/null
+++ b/net/bird/files/exp-templates.patch
@@ -0,0 +1,140 @@
+From 80d3b227f32679332957299a9c01da66cce54427 Mon Sep 17 00:00:00 2001
+From: "Alexander V. Chernikov" <melifaro@yandex-team.ru>
+Date: Fri, 19 Dec 2014 15:36:40 +0000
+Subject: [PATCH 1/3] Simplify using templates for BGP:
+
+Permit specifying remote as via 'remote as' statement.
+Permit specifying interface for link-local sessions via 'interface'
+statement.
+Relax 'neighbor' statement: do not require specifying as.
+---
+ conf/confbase.Y    |  3 +--
+ doc/bird.sgml      | 11 ++++++++++-
+ proto/bgp/bgp.c    | 11 +++++++++++
+ proto/bgp/config.Y | 19 ++++++++++++-------
+ 4 files changed, 34 insertions(+), 10 deletions(-)
+
+diff --git conf/confbase.Y conf/confbase.Y
+index 49831b1..ccc9e10 100644
+--- conf/confbase.Y
++++ conf/confbase.Y
+@@ -162,8 +162,7 @@ ipa_scope:
+  ;
+ 
+ ipa_port:
+-   /* empty */ { $$ = 0; }
+- | PORT expr {
++ PORT expr {
+      if (($2 < 1) || ($2 > 65535)) cf_error("Invalid port number");
+      $$ = $2;
+    }
+diff --git doc/bird.sgml doc/bird.sgml
+index 31b1d6f..e9e5920 100644
+--- doc/bird.sgml
++++ doc/bird.sgml
+@@ -1620,7 +1620,11 @@ using the following configuration parameters:
+ 	address, equivalent to the <cf/source address/ option (see below). This
+ 	parameter is mandatory.
+ 
+-	<tag>neighbor <m/ip/ [port <m/number/] as <m/number/</tag>
++	<tag>remote as <m/number/</tag>
++	Define neighboring AS number. AS number can also be specified inside
++	<cf/neighbor/ statement. In that case, this paremeter is optional.
++
++	<tag>neighbor <m/ip/ [port <m/number/] [as <m/number/]</tag>
+ 	Define neighboring router this instance will be talking to and what AS
+ 	it's located in. In case the neighbor is in the same AS as we are, we
+ 	automatically switch to iBGP. This parameter is mandatory.
+@@ -1649,6 +1653,11 @@ using the following configuration parameters:
+ 	source address for the BGP session. Default: the address of the local
+ 	end of the interface our neighbor is connected to.
+ 
++	<tag>interface <m/iface/</tag>
++	Define interface we should use for link-local BGP IPv6 sessions. Interface
++	can also be specified inside <cf/neighbor address/. It is an error to use
++	this parameter for non link-local sessions. This parameter is optional.
++
+ 	<tag>next hop self</tag>
+ 	Avoid calculation of the Next Hop attribute and always advertise our own
+ 	source address as a next hop. This needs to be used only occasionally to
+diff --git proto/bgp/bgp.c proto/bgp/bgp.c
+index e233911..3fbedad 100644
+--- proto/bgp/bgp.c
++++ proto/bgp/bgp.c
+@@ -1157,6 +1157,9 @@ bgp_check_config(struct bgp_config *c)
+   if (!c->remote_as)
+     cf_error("Neighbor must be configured");
+ 
++  if (!c->remote_port)
++    cf_error("Correct BGP port must be set");
++
+   if (!(c->capabilities && c->enable_as4) && (c->remote_as > 0xFFFF))
+     cf_error("Neighbor AS number out of range (AS4 not available)");
+ 
+@@ -1176,6 +1179,14 @@ bgp_check_config(struct bgp_config *c)
+   if (c->multihop && c->bfd && ipa_zero(c->source_addr))
+     cf_error("Multihop BGP with BFD requires specified source address");
+ 
++  if (!c->iface && (ipa_has_link_scope(c->remote_ip) ||
++		      ipa_has_link_scope(c->source_addr)))
++    cf_error("Link-local BGP requires specifying interface");
++
++  if (c->iface && (!ipa_has_link_scope(c->remote_ip) &&
++		      !ipa_has_link_scope(c->source_addr)))
++    cf_error("Explicit interface specified for global addresses");
++
+   if ((c->gw_mode == GW_RECURSIVE) && c->c.table->sorted)
+     cf_error("BGP in recursive mode prohibits sorted table");
+ 
+diff --git proto/bgp/config.Y proto/bgp/config.Y
+index 8e0b241..d04c16d 100644
+--- proto/bgp/config.Y
++++ proto/bgp/config.Y
+@@ -16,7 +16,7 @@ CF_DEFINES
+ 
+ CF_DECLS
+ 
+-CF_KEYWORDS(BGP, LOCAL, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY,
++CF_KEYWORDS(BGP, LOCAL, REMOTE, NEIGHBOR, AS, HOLD, TIME, CONNECT, RETRY,
+ 	KEEPALIVE, MULTIHOP, STARTUP, VIA, NEXT, HOP, SELF, DEFAULT,
+ 	PATH, METRIC, ERROR, START, DELAY, FORGET, WAIT, ENABLE,
+ 	DISABLE, AFTER, BGP_PATH, BGP_LOCAL_PREF, BGP_MED, BGP_ORIGIN,
+@@ -52,24 +52,29 @@ bgp_proto_start: proto_start BGP {
+      BGP_CFG->default_local_pref = 100;
+      BGP_CFG->gr_mode = BGP_GR_AWARE;
+      BGP_CFG->gr_time = 120;
++     BGP_CFG->remote_port = BGP_PORT;
+  }
+  ;
+ 
++bpg_neighbor_opts:
++  | ipa_port { if ($1 != 0) BGP_CFG->remote_port = $1; }
++  | AS expr { BGP_CFG->remote_as = $2; }
++  ;
++
+ bgp_proto:
+    bgp_proto_start proto_name '{'
+  | bgp_proto proto_item ';'
+  | bgp_proto LOCAL AS expr ';' { BGP_CFG->local_as = $4; }
+  | bgp_proto LOCAL ipa AS expr ';' { BGP_CFG->source_addr = $3; BGP_CFG->local_as = $5; }
+- | bgp_proto NEIGHBOR ipa ipa_scope ipa_port AS expr ';' {
++ | bgp_proto REMOTE AS expr ';' { BGP_CFG->remote_as = $4; }
++ | bgp_proto INTERFACE SYM ';' { BGP_CFG->iface = if_get_by_name($3->name); }
++ | bgp_proto NEIGHBOR ipa ipa_scope bpg_neighbor_opts ';' {
+      if (ipa_nonzero(BGP_CFG->remote_ip))
+        cf_error("Only one neighbor per BGP instance is allowed");
+-     if (!ipa_has_link_scope($3) != !$4)
+-       cf_error("Link-local address and interface scope must be used together");
+ 
+      BGP_CFG->remote_ip = $3;
+-     BGP_CFG->iface = $4;
+-     BGP_CFG->remote_port = ($5 > 0) ? $5 : BGP_PORT;
+-     BGP_CFG->remote_as = $7;
++     if ($4 != NULL)
++       BGP_CFG->iface = $4;
+    }
+  | bgp_proto RR CLUSTER ID idval ';' { BGP_CFG->rr_cluster_id = $5; }
+  | bgp_proto RR CLIENT ';' { BGP_CFG->rr_client = 1; }
+-- 
+2.1.2
+
diff --git a/net/bird6/Makefile b/net/bird6/Makefile
index 2ce4aabdae60..f67bcb79660b 100644
--- a/net/bird6/Makefile
+++ b/net/bird6/Makefile
@@ -7,7 +7,7 @@ DISTNAME=	bird-${PORTVERSION}
 
 MASTERDIR=	${.CURDIR}/../bird
 
-OPTIONS_DEFINE=
+OPTIONS_DEFINE=	EXP
 
 USE_RC_SUBR=	${PORTNAME}