-.\" $OpenBSD: bgpd.conf.5,v 1.238 2024/03/18 10:16:50 claudio Exp $
+.\" $OpenBSD: bgpd.conf.5,v 1.239 2024/04/09 09:03:18 claudio Exp $
.\"
.\" Copyright (c) 2004 Claudio Jeker <claudio@openbsd.org>
.\" Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
-.Dd $Mdocdate: March 18 2024 $
+.Dd $Mdocdate: April 9 2024 $
.Dt BGPD.CONF 5
.Os
.Sh NAME
.Ic announce
.Pq Ic IPv4 Ns | Ns Ic IPv6
.Pq Ic none Ns | Ns Ic unicast Ns | Ns Ic vpn Ns | Ns Ic flowspec
+.Op Ic enforce
.Xc
For the given address family, control which
.Em subsequent address families
.Pp
.It Xo
.Ic announce add-path recv
-.Pq Ic yes Ns | Ns Ic no
+.Pq Ic yes Ns | Ns Ic no Ns | Ns Ic enforce
.Xc
If set to
.Ic yes ,
.It Xo
.Ic announce add-path send
.Pq Ic no Ns | Ns Ic all
+.Op Ic enforce
.Xc
.It Xo
.Ic announce add-path send
-.Pq Ic best Ns | Ns Ic ecmp | Ns Ic as-wide-best
+.Pq Ic best Ns | Ns Ic ecmp Ns | Ns Ic as-wide-best
.Op Ic plus Ar num
.Op Ic max Ar num
+.Op Ic enforce
.Xc
If set to
.Ic all ,
.Pp
.It Xo
.Ic announce as-4byte
-.Pq Ic yes Ns | Ns Ic no
+.Pq Ic yes Ns | Ns Ic no Ns | Ns Ic enforce
.Xc
If set to
.Ic no ,
the 4-byte AS capability is not announced and so native 4-byte AS support is
disabled.
+If
+.Ic enforce
+is set, the session will only be established if the neighbor also announces
+the capability.
The default is
.Ic yes .
.Pp
.Pp
.It Xo
.Ic announce enhanced refresh
-.Pq Ic yes Ns | Ns Ic no
+.Pq Ic yes Ns | Ns Ic no Ns | Ns Ic enforce
.Xc
If set to
.Ic yes ,
the enhanced route refresh capability is announced.
+If
+.Ic enforce
+is set, the session will only be established if the neighbor also announces
+the capability.
The default is
.Ic no .
.Pp
the session will be closed.
If
.Ic enforce
-is set the session will only establish if the neighbor also announces
-the open policy capability.
+is set, the session will only be established if the neighbor also announces
+the capability.
The default is
.Ic no .
.Pp
.It Xo
.Ic announce refresh
-.Pq Ic yes Ns | Ns Ic no
+.Pq Ic yes Ns | Ns Ic no Ns | Ns Ic enforce
.Xc
If set to
.Ic no ,
the route refresh capability is not announced.
+If
+.Ic enforce
+is set, the session will only be established if the neighbor also announces
+the capability.
The default is
.Ic yes .
.Pp
.It Xo
.Ic announce restart
-.Pq Ic yes Ns | Ns Ic no
+.Pq Ic yes Ns | Ns Ic no Ns | Ns Ic enforce
.Xc
If set to
.Ic no ,
Currently only the End-of-RIB marker is supported and announced by the
.Ic restart
capability.
+If
+.Ic enforce
+is set, the session will only be established if the neighbor also announces
+the capability.
The default is
.Ic yes .
.Pp
-/* $OpenBSD: bgpd.h,v 1.489 2024/03/22 15:41:34 claudio Exp $ */
+/* $OpenBSD: bgpd.h,v 1.490 2024/04/09 09:03:18 claudio Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
#define CAPA_AP_RECV 0x01
#define CAPA_AP_SEND 0x02
#define CAPA_AP_BIDIR 0x03
+#define CAPA_AP_MASK 0x0f
+#define CAPA_AP_RECV_ENFORCE 0x10 /* internal only */
+#define CAPA_AP_SEND_ENFORCE 0x20 /* internal only */
/* values for RFC 9234 - BGP Open Policy */
#define CAPA_ROLE_PROVIDER 0x00
-/* $OpenBSD: parse.y,v 1.458 2024/04/03 08:57:26 claudio Exp $ */
+/* $OpenBSD: parse.y,v 1.459 2024/04/09 09:03:18 claudio Exp $ */
/*
* Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
%type <v.number> asnumber as4number as4number_any optnumber
%type <v.number> espah af safi restart origincode nettype
%type <v.number> yesno inout restricted expires enforce
+%type <v.number> yesnoenforce enforce
%type <v.number> validity aspa_validity
%type <v.number> addpathextra addpathmax
%type <v.number> port proto_item tos length flag icmptype
}
curpeer->conf.min_holdtime = $3;
}
- | ANNOUNCE af safi {
+ | ANNOUNCE af safi enforce {
uint8_t aid, safi;
uint16_t afi;
yyerror("unknown AFI/SAFI pair");
YYERROR;
}
- curpeer->conf.capabilities.mp[aid] = 1;
+ if ($4)
+ curpeer->conf.capabilities.mp[aid] = 2;
+ else
+ curpeer->conf.capabilities.mp[aid] = 1;
}
}
| ANNOUNCE CAPABILITIES yesno {
curpeer->conf.announce_capa = $3;
}
- | ANNOUNCE REFRESH yesno {
+ | ANNOUNCE REFRESH yesnoenforce {
curpeer->conf.capabilities.refresh = $3;
}
- | ANNOUNCE ENHANCED REFRESH yesno {
+ | ANNOUNCE ENHANCED REFRESH yesnoenforce {
curpeer->conf.capabilities.enhanced_rr = $4;
}
- | ANNOUNCE RESTART yesno {
+ | ANNOUNCE RESTART yesnoenforce {
curpeer->conf.capabilities.grestart.restart = $3;
}
- | ANNOUNCE AS4BYTE yesno {
+ | ANNOUNCE AS4BYTE yesnoenforce {
curpeer->conf.capabilities.as4byte = $3;
}
- | ANNOUNCE ADDPATH RECV yesno {
+ | ANNOUNCE ADDPATH RECV yesnoenforce {
int8_t *ap = curpeer->conf.capabilities.add_path;
uint8_t i;
- for (i = AID_MIN; i < AID_MAX; i++)
- if ($4)
+ for (i = AID_MIN; i < AID_MAX; i++) {
+ if ($4) {
+ if ($4 == 2)
+ ap[i] |= CAPA_AP_RECV_ENFORCE;
ap[i] |= CAPA_AP_RECV;
- else
+ } else
ap[i] &= ~CAPA_AP_RECV;
+ }
}
- | ANNOUNCE ADDPATH SEND STRING addpathextra addpathmax {
+ | ANNOUNCE ADDPATH SEND STRING addpathextra addpathmax enforce {
int8_t *ap = curpeer->conf.capabilities.add_path;
enum addpath_mode mode;
u_int8_t i;
if (!strcmp($4, "no")) {
free($4);
- if ($5 != 0 || $6 != 0) {
+ if ($5 != 0 || $6 != 0 || $7 != 0) {
yyerror("no additional option allowed "
"for 'add-path send no'");
YYERROR;
YYERROR;
}
for (i = AID_MIN; i < AID_MAX; i++) {
- if (mode != ADDPATH_EVAL_NONE)
+ if (mode != ADDPATH_EVAL_NONE) {
+ if ($7)
+ ap[i] |= CAPA_AP_SEND_ENFORCE;
ap[i] |= CAPA_AP_SEND;
- else
+ } else
ap[i] &= ~CAPA_AP_SEND;
}
curpeer->conf.eval.mode = mode;
curpeer->conf.eval.extrapaths = $5;
curpeer->conf.eval.maxpaths = $6;
}
- | ANNOUNCE POLICY enforce {
+ | ANNOUNCE POLICY yesnoenforce {
curpeer->conf.capabilities.policy = $3;
}
| ROLE STRING {
| DELETE { $$ = 1; }
;
-enforce : yesno { $$ = $1; }
+enforce : /* empty */ { $$ = 0; }
+ | ENFORCE { $$ = 2; }
+ ;
+
+yesnoenforce : yesno { $$ = $1; }
| ENFORCE { $$ = 2; }
;
-/* $OpenBSD: printconf.c,v 1.170 2024/03/20 09:35:46 claudio Exp $ */
+/* $OpenBSD: printconf.c,v 1.171 2024/04/09 09:03:18 claudio Exp $ */
/*
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
print_announce(struct peer_config *p, const char *c)
{
uint8_t aid;
+ int match = 0;
if (p->announce_capa == 0)
printf("%s\tannounce capabilities no\n", c);
for (aid = AID_MIN; aid < AID_MAX; aid++)
- if (p->capabilities.mp[aid])
+ if (p->capabilities.mp[aid] == 2) {
+ printf("%s\tannounce %s enforce\n", c, aid2str(aid));
+ match = 1;
+ } else if (p->capabilities.mp[aid]) {
printf("%s\tannounce %s\n", c, aid2str(aid));
+ match = 1;
+ }
+ if (!match) {
+ printf("%s\tannounce IPv4 none\n", c);
+ printf("%s\tannounce IPv6 none\n", c);
+ }
- if (p->capabilities.refresh == 0)
+ if (p->capabilities.refresh == 2)
+ printf("%s\tannounce refresh enforce\n", c);
+ else if (p->capabilities.refresh == 0)
printf("%s\tannounce refresh no\n", c);
- if (p->capabilities.enhanced_rr == 1)
+
+ if (p->capabilities.enhanced_rr == 2)
+ printf("%s\tannounce enhanced refresh enforce\n", c);
+ else if (p->capabilities.enhanced_rr == 1)
printf("%s\tannounce enhanced refresh yes\n", c);
- if (p->capabilities.grestart.restart == 0)
+
+ if (p->capabilities.grestart.restart == 2)
+ printf("%s\tannounce restart enforce\n", c);
+ else if (p->capabilities.grestart.restart == 0)
printf("%s\tannounce restart no\n", c);
- if (p->capabilities.as4byte == 0)
+
+ if (p->capabilities.as4byte == 2)
+ printf("%s\tannounce as4byte enforce\n", c);
+ else if (p->capabilities.as4byte == 0)
printf("%s\tannounce as4byte no\n", c);
- if (p->capabilities.add_path[0] & CAPA_AP_RECV)
+
+ if (p->capabilities.add_path[AID_MIN] & CAPA_AP_RECV_ENFORCE)
+ printf("%s\tannounce add-path recv enforce\n", c);
+ else if (p->capabilities.add_path[AID_MIN] & CAPA_AP_RECV)
printf("%s\tannounce add-path recv yes\n", c);
- if (p->capabilities.add_path[0] & CAPA_AP_SEND) {
+
+ if (p->capabilities.add_path[AID_MIN] & CAPA_AP_SEND) {
printf("%s\tannounce add-path send %s", c,
print_addpath_mode(p->eval.mode));
if (p->eval.extrapaths != 0)
printf(" plus %d", p->eval.extrapaths);
if (p->eval.maxpaths != 0)
printf(" max %d", p->eval.maxpaths);
+ if (p->capabilities.add_path[AID_MIN] & CAPA_AP_SEND_ENFORCE)
+ printf(" enforce");
printf("\n");
}
- if (p->capabilities.policy) {
- printf("%s\tannounce policy %s\n", c,
- p->capabilities.policy == 2 ? "enforce" : "yes");
- }
+
+ if (p->capabilities.policy == 2)
+ printf("%s\tannounce policy enforce\n", c);
+ else if (p->capabilities.policy == 1)
+ printf("%s\tannounce policy yes\n", c);
+ else
+ printf("%s\tannounce policy no\n", c);
}
void
-/* $OpenBSD: session.c,v 1.467 2024/03/26 12:45:29 claudio Exp $ */
+/* $OpenBSD: session.c,v 1.468 2024/04/09 09:03:18 claudio Exp $ */
/*
* Copyright (c) 2003, 2004, 2005 Henning Brauer <henning@openbsd.org>
int parse_rrefresh(struct peer *);
int parse_notification(struct peer *);
int parse_capabilities(struct peer *, u_char *, uint16_t, uint32_t *);
-int capa_neg_calc(struct peer *, uint8_t *);
+int capa_neg_calc(struct peer *);
void session_dispatch_imsg(struct imsgbuf *, int, u_int *);
void session_up(struct peer *);
void session_down(struct peer *);
for (i = AID_MIN; i < AID_MAX; i++) {
if (p->capa.ann.mp[i]) {
errs += session_capa_add_afi(opb,
- i, p->capa.ann.add_path[i]);
+ i, p->capa.ann.add_path[i] &
+ CAPA_AP_MASK);
}
}
} else { /* AID_INET */
errs += session_capa_add_afi(opb, AID_INET,
- p->capa.ann.add_path[AID_INET]);
+ p->capa.ann.add_path[AID_INET] & CAPA_AP_MASK);
}
}
uint16_t holdtime, oholdtime, myholdtime;
uint32_t as, bgpid;
uint16_t optparamlen, extlen, plen, op_len;
- uint8_t op_type, suberr = 0;
+ uint8_t op_type;
p = peer->rbuf->rptr;
p += MSGSIZE_HEADER_MARKER;
return (-1);
}
- if (capa_neg_calc(peer, &suberr) == -1) {
- session_notification(peer, ERR_OPEN, suberr, NULL);
+ if (capa_neg_calc(peer) == -1) {
change_state(peer, STATE_IDLE, EVNT_RCVD_OPEN);
return (-1);
}
}
int
-capa_neg_calc(struct peer *p, uint8_t *suberr)
+capa_neg_calc(struct peer *p)
{
- uint8_t i, hasmp = 0;
+ struct ibuf *ebuf;
+ uint8_t i, hasmp = 0, capa_code, capa_len, capa_aid = 0;
/* a capability is accepted only if both sides announced it */
*/
memset(p->capa.neg.add_path, 0, sizeof(p->capa.neg.add_path));
for (i = AID_MIN; i < AID_MAX; i++) {
+ if (p->capa.neg.mp[i] == 0)
+ continue;
if ((p->capa.ann.add_path[i] & CAPA_AP_RECV) &&
(p->capa.peer.add_path[i] & CAPA_AP_SEND)) {
p->capa.neg.add_path[i] |= CAPA_AP_RECV;
switch (p->conf.role) {
case ROLE_PROVIDER:
if (p->remote_role != ROLE_CUSTOMER)
- goto fail;
+ goto policyfail;
break;
case ROLE_RS:
if (p->remote_role != ROLE_RS_CLIENT)
- goto fail;
+ goto policyfail;
break;
case ROLE_RS_CLIENT:
if (p->remote_role != ROLE_RS)
- goto fail;
+ goto policyfail;
break;
case ROLE_CUSTOMER:
if (p->remote_role != ROLE_PROVIDER)
- goto fail;
+ goto policyfail;
break;
case ROLE_PEER:
if (p->remote_role != ROLE_PEER)
- goto fail;
+ goto policyfail;
break;
default:
- fail:
+ policyfail:
log_peer_warnx(&p->conf, "open policy role mismatch: "
"our role %s, their role %s",
log_policy(p->conf.role),
log_policy(p->remote_role));
- *suberr = ERR_OPEN_ROLE;
+ session_notification(p, ERR_OPEN, ERR_OPEN_ROLE, NULL);
return (-1);
}
p->capa.neg.policy = 1;
- } else if (p->capa.ann.policy == 2 && p->conf.ebgp) {
- /* enforce presence of open policy role capability */
+ }
+
+ /* enforce presence of open policy role capability */
+ if (p->capa.ann.policy == 2 && p->capa.peer.policy == 0 &&
+ p->conf.ebgp) {
log_peer_warnx(&p->conf, "open policy role enforced but "
"not present");
- *suberr = ERR_OPEN_ROLE;
+ session_notification(p, ERR_OPEN, ERR_OPEN_ROLE, NULL);
return (-1);
}
+ /* enforce presence of other capabilities */
+ if (p->capa.ann.refresh == 2 && p->capa.neg.refresh == 0) {
+ capa_code = CAPA_REFRESH;
+ capa_len = 0;
+ goto fail;
+ }
+ if (p->capa.ann.enhanced_rr == 2 && p->capa.neg.enhanced_rr == 0) {
+ capa_code = CAPA_ENHANCED_RR;
+ capa_len = 0;
+ goto fail;
+ }
+ if (p->capa.ann.as4byte == 2 && p->capa.neg.as4byte == 0) {
+ capa_code = CAPA_AS4BYTE;
+ capa_len = 4;
+ goto fail;
+ }
+ if (p->capa.ann.grestart.restart == 2 &&
+ p->capa.neg.grestart.restart == 0) {
+ capa_code = CAPA_RESTART;
+ capa_len = 2;
+ goto fail;
+ }
+ for (i = AID_MIN; i < AID_MAX; i++) {
+ if (p->capa.ann.mp[i] == 2 && p->capa.neg.mp[i] == 0) {
+ capa_code = CAPA_MP;
+ capa_len = 4;
+ capa_aid = i;
+ goto fail;
+ }
+ }
+
+ for (i = AID_MIN; i < AID_MAX; i++) {
+ if (p->capa.neg.mp[i] == 0)
+ continue;
+ if ((p->capa.ann.add_path[i] & CAPA_AP_RECV_ENFORCE) &&
+ (p->capa.neg.add_path[i] & CAPA_AP_RECV) == 0) {
+ capa_code = CAPA_ADD_PATH;
+ capa_len = 4;
+ capa_aid = i;
+ goto fail;
+ }
+ if ((p->capa.ann.add_path[i] & CAPA_AP_SEND_ENFORCE) &&
+ (p->capa.neg.add_path[i] & CAPA_AP_SEND) == 0) {
+ capa_code = CAPA_ADD_PATH;
+ capa_len = 4;
+ capa_aid = i;
+ goto fail;
+ }
+ }
+
return (0);
+
+ fail:
+ if ((ebuf = ibuf_dynamic(2, 256)) == NULL)
+ return (-1);
+ /* best effort, no problem if it fails */
+ session_capa_add(ebuf, capa_code, capa_len);
+ if (capa_code == CAPA_MP)
+ session_capa_add_mp(ebuf, capa_aid);
+ else if (capa_code == CAPA_ADD_PATH)
+ session_capa_add_afi(ebuf, capa_aid, 0);
+ else if (capa_len > 0)
+ ibuf_add_zero(ebuf, capa_len);
+
+ session_notification(p, ERR_OPEN, ERR_OPEN_CAPA, ebuf);
+ ibuf_free(ebuf);
+ return (-1);
}
void
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