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BGP: Add support for SAFI 129 (VPN multicast)

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Which, in contrast to SAFI 128, does not use MPLS labels.
This commit is contained in:
Ondrej Zajicek (work) 2017-03-30 14:00:08 +02:00 committed by Jan Moskyto Matejka
parent ffb38dfb8b
commit 711d617dc1
3 changed files with 41 additions and 14 deletions
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3
proto/bgp/bgp.h
View file

@ -33,6 +33,7 @@ struct eattr;
#define BGP_SAFI_MULTICAST 2
#define BGP_SAFI_MPLS 4
#define BGP_SAFI_MPLS_VPN 128
#define BGP_SAFI_VPN_MULTICAST 129
#define BGP_SAFI_FLOW 133
/* Internal AF codes */
@ -49,6 +50,8 @@ struct eattr;
#define BGP_AF_IPV6_MPLS BGP_AF( BGP_AFI_IPV6, BGP_SAFI_MPLS )
#define BGP_AF_VPN4_MPLS BGP_AF( BGP_AFI_IPV4, BGP_SAFI_MPLS_VPN )
#define BGP_AF_VPN6_MPLS BGP_AF( BGP_AFI_IPV6, BGP_SAFI_MPLS_VPN )
#define BGP_AF_VPN4_MC BGP_AF( BGP_AFI_IPV4, BGP_SAFI_VPN_MULTICAST )
#define BGP_AF_VPN6_MC BGP_AF( BGP_AFI_IPV6, BGP_SAFI_VPN_MULTICAST )
#define BGP_AF_FLOW4 BGP_AF( BGP_AFI_IPV4, BGP_SAFI_FLOW )
#define BGP_AF_FLOW6 BGP_AF( BGP_AFI_IPV6, BGP_SAFI_FLOW )

22
proto/bgp/config.Y
View file

@ -135,16 +135,18 @@ bgp_proto:
;
bgp_afi:
IPV4 { $$ = BGP_AF_IPV4; }
| IPV6 { $$ = BGP_AF_IPV6; }
| IPV4 MULTICAST { $$ = BGP_AF_IPV4_MC; }
| IPV6 MULTICAST { $$ = BGP_AF_IPV6_MC; }
| IPV4 MPLS { $$ = BGP_AF_IPV4_MPLS; }
| IPV6 MPLS { $$ = BGP_AF_IPV6_MPLS; }
| VPN4 MPLS { $$ = BGP_AF_VPN4_MPLS; }
| VPN6 MPLS { $$ = BGP_AF_VPN6_MPLS; }
| FLOW4 { $$ = BGP_AF_FLOW4; }
| FLOW6 { $$ = BGP_AF_FLOW6; }
IPV4 { $$ = BGP_AF_IPV4; }
| IPV6 { $$ = BGP_AF_IPV6; }
| IPV4 MULTICAST { $$ = BGP_AF_IPV4_MC; }
| IPV6 MULTICAST { $$ = BGP_AF_IPV6_MC; }
| IPV4 MPLS { $$ = BGP_AF_IPV4_MPLS; }
| IPV6 MPLS { $$ = BGP_AF_IPV6_MPLS; }
| VPN4 MPLS { $$ = BGP_AF_VPN4_MPLS; }
| VPN6 MPLS { $$ = BGP_AF_VPN6_MPLS; }
| VPN4 MULTICAST { $$ = BGP_AF_VPN4_MC; }
| VPN6 MULTICAST { $$ = BGP_AF_VPN6_MC; }
| FLOW4 { $$ = BGP_AF_FLOW4; }
| FLOW6 { $$ = BGP_AF_FLOW6; }
;
bgp_channel_start: bgp_afi

30
proto/bgp/packets.c
View file

@ -289,8 +289,8 @@ bgp_write_capabilities(struct bgp_conn *conn, byte *buf)
/* Create capability list in buffer */
/*
* Note that max length is ~ 20+14*af_count. With max 10 channels that is
* 160. Option limit is 253 and buffer size is 4096, so we cannot overflow
* Note that max length is ~ 20+14*af_count. With max 12 channels that is
* 188. Option limit is 253 and buffer size is 4096, so we cannot overflow
* unless we add new capabilities or more AFs.
*/
@ -1386,7 +1386,8 @@ bgp_encode_nlri_vpn4(struct bgp_write_state *s, struct bgp_bucket *buck, byte *b
ADVANCE(pos, size, 1);
/* Encode MPLS labels */
bgp_encode_mpls_labels(s, s->mpls_labels, &pos, &size, pos - 1);
if (s->mpls)
bgp_encode_mpls_labels(s, s->mpls_labels, &pos, &size, pos - 1);
/* Encode route distinguisher */
put_u64(pos, net->rd);
@ -1430,7 +1431,8 @@ bgp_decode_nlri_vpn4(struct bgp_parse_state *s, byte *pos, uint len, rta *a)
bgp_parse_error(s, 1);
/* Decode MPLS labels */
bgp_decode_mpls_labels(s, &pos, &len, &l, a);
if (s->mpls)
bgp_decode_mpls_labels(s, &pos, &len, &l, a);
/* Decode route distinguisher */
if (l < 64)
@ -1824,6 +1826,26 @@ static const struct bgp_af_desc bgp_af_table[] = {
.decode_next_hop = bgp_decode_next_hop_vpn,
.update_next_hop = bgp_update_next_hop_ip,
},
{
.afi = BGP_AF_VPN4_MC,
.net = NET_VPN4,
.name = "vpn4-mc",
.encode_nlri = bgp_encode_nlri_vpn4,
.decode_nlri = bgp_decode_nlri_vpn4,
.encode_next_hop = bgp_encode_next_hop_vpn,
.decode_next_hop = bgp_decode_next_hop_vpn,
.update_next_hop = bgp_update_next_hop_ip,
},
{
.afi = BGP_AF_VPN6_MC,
.net = NET_VPN6,
.name = "vpn6-mc",
.encode_nlri = bgp_encode_nlri_vpn6,
.decode_nlri = bgp_decode_nlri_vpn6,
.encode_next_hop = bgp_encode_next_hop_vpn,
.decode_next_hop = bgp_decode_next_hop_vpn,
.update_next_hop = bgp_update_next_hop_ip,
},
{
.afi = BGP_AF_FLOW4,
.net = NET_FLOW4,