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Merge pull request #4314 from lkrishnamoor/extract_tunnel_type_extcom

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bgpd: Extract tunnel type from extended communities
This commit is contained in:
Donald Sharp 2019-05-14 20:18:29 -04:00 committed by GitHub
commit 13f9ea7253
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 47 additions and 36 deletions
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37
bgpd/bgp_attr.c
View File

@ -51,7 +51,6 @@
#include "bgp_encap_types.h"
#include "bgp_vnc_types.h"
#endif
#include "bgp_encap_types.h"
#include "bgp_evpn.h"
#include "bgp_flowspec_private.h"
#include "bgp_mac.h"
@ -1957,6 +1956,10 @@ bgp_attr_ext_communities(struct bgp_attr_parser_args *args)
}
/* Get the tunnel type from encap extended community */
bgp_attr_extcom_tunnel_type(attr,
(bgp_encap_types *)&attr->encap_tunneltype);
return BGP_ATTR_PARSE_PROCEED;
}
@ -2776,6 +2779,38 @@ bgp_attr_parse_ret_t bgp_attr_parse(struct peer *peer, struct attr *attr,
return BGP_ATTR_PARSE_PROCEED;
}
/*
* Extract the tunnel type from extended community
*/
void bgp_attr_extcom_tunnel_type(struct attr *attr,
bgp_encap_types *tunnel_type)
{
struct ecommunity *ecom;
int i;
if (!attr)
return false;
ecom = attr->ecommunity;
if (!ecom || !ecom->size)
return false;
for (i = 0; i < ecom->size; i++) {
uint8_t *pnt;
uint8_t type, sub_type;
pnt = (ecom->val + (i * ECOMMUNITY_SIZE));
type = pnt[0];
sub_type = pnt[1];
if (!(type == ECOMMUNITY_ENCODE_OPAQUE &&
sub_type == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP))
continue;
*tunnel_type = ((pnt[6] << 8) | pnt[7]);
return true;
}
return false;
}
size_t bgp_packet_mpattr_start(struct stream *s, struct peer *peer, afi_t afi,
safi_t safi, struct bpacket_attr_vec_arr *vecarr,
struct attr *attr)

4
bgpd/bgp_attr.h
View File

@ -23,6 +23,7 @@
#include "mpls.h"
#include "bgp_attr_evpn.h"
#include "bgpd/bgp_encap_types.h"
/* Simple bit mapping. */
#define BITMAP_NBBY 8
@ -317,6 +318,9 @@ encap_tlv_dup(struct bgp_attr_encap_subtlv *orig);
extern void bgp_attr_flush_encap(struct attr *attr);
extern void bgp_attr_extcom_tunnel_type(struct attr *attr,
bgp_encap_types *tunnel_type);
/**
* Set of functions to encode MP_REACH_NLRI and MP_UNREACH_NLRI attributes.
* Typical call sequence is to call _start(), followed by multiple _prefix(),

1
bgpd/bgp_ecommunity.h
View File

@ -22,6 +22,7 @@
#define _QUAGGA_BGP_ECOMMUNITY_H
#include "bgpd/bgp_route.h"
#include "bgpd/bgpd.h"
/* High-order octet of the Extended Communities type field. */
#define ECOMMUNITY_ENCODE_AS 0x00

35
bgpd/rfapi/rfapi_import.c
View File

@ -374,42 +374,15 @@ int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime)
return ENOENT;
}
/*
* Extract the tunnel type from the extended community
*/
int rfapiGetTunnelType(struct attr *attr, bgp_encap_types *type)
{
*type = BGP_ENCAP_TYPE_MPLS; /* default to MPLS */
if (attr && attr->ecommunity) {
struct ecommunity *ecom = attr->ecommunity;
int i;
for (i = 0; i < (ecom->size * ECOMMUNITY_SIZE);
i += ECOMMUNITY_SIZE) {
uint8_t *ep;
ep = ecom->val + i;
if (ep[0] == ECOMMUNITY_ENCODE_OPAQUE
&& ep[1] == ECOMMUNITY_OPAQUE_SUBTYPE_ENCAP) {
*type = (ep[6] << 8) + ep[7];
return 0;
}
}
}
return ENOENT;
}
/*
* Look for UN address in Encap attribute
*/
int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p)
{
struct bgp_attr_encap_subtlv *pEncap;
bgp_encap_types tun_type;
bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/
rfapiGetTunnelType(attr, &tun_type);
bgp_attr_extcom_tunnel_type(attr, &tun_type);
if (tun_type == BGP_ENCAP_TYPE_MPLS) {
if (!p)
return 0;
@ -1350,7 +1323,7 @@ rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix,
}
if (bpi->attr) {
bgp_encap_types tun_type;
bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS; /*Default*/
new->prefix.cost = rfapiRfpCost(bpi->attr);
struct bgp_attr_encap_subtlv *pEncap;
@ -1390,7 +1363,7 @@ rfapiRouteInfo2NextHopEntry(struct rfapi_ip_prefix *rprefix,
}
}
rfapiGetTunnelType(bpi->attr, &tun_type);
bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type);
if (tun_type == BGP_ENCAP_TYPE_MPLS) {
struct prefix p;
/* MPLS carries UN address in next hop */

2
bgpd/rfapi/rfapi_private.h
View File

@ -306,8 +306,6 @@ extern int rfapiCliGetPrefixAddr(struct vty *vty, const char *str,
extern int rfapiGetVncLifetime(struct attr *attr, uint32_t *lifetime);
extern int rfapiGetTunnelType(struct attr *attr, bgp_encap_types *type);
extern int rfapiGetVncTunnelUnAddr(struct attr *attr, struct prefix *p);
extern int rfapi_reopen(struct rfapi_descriptor *rfd, struct bgp *bgp);

4
bgpd/rfapi/rfapi_vty.c
View File

@ -1020,7 +1020,7 @@ static int rfapiPrintRemoteRegBi(struct bgp *bgp, void *stream,
struct prefix pfx_vn;
uint8_t cost;
uint32_t lifetime;
bgp_encap_types tun_type;
bgp_encap_types tun_type = BGP_ENCAP_TYPE_MPLS;/*Default tunnel type*/
char buf_pfx[BUFSIZ];
char buf_ntop[BUFSIZ];
@ -1055,7 +1055,7 @@ static int rfapiPrintRemoteRegBi(struct bgp *bgp, void *stream,
BUFSIZ));
}
rfapiGetTunnelType(bpi->attr, &tun_type);
bgp_attr_extcom_tunnel_type(bpi->attr, &tun_type);
/*
* VN addr
*/