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bgpd: encap: add attribute handling

Browse Source 
Signed-off-by: Lou Berger <lberger@labn.net>
Reviewed-by: David Lamparter <equinox@opensourcerouting.org>
(cherry picked from commit c3741789530ee824693fd606356acac2ad695f83)

Conflicts:
	bgpd/Makefile.am
	bgpd/bgp_attr.c
	bgpd/bgp_attr.h
	lib/memtypes.c
This commit is contained in:
Lou Berger 2016-01-12 13:42:01 -05:00 committed by vivek
parent eaafc874d0
commit f4c89855b5
8 changed files with 1570 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
bgpd/Makefile.am
View File

@ -16,7 +16,8 @@ libbgp_a_SOURCES = \
bgp_packet.c bgp_network.c bgp_filter.c bgp_regex.c bgp_clist.c \
bgp_dump.c bgp_snmp.c bgp_ecommunity.c bgp_mplsvpn.c bgp_nexthop.c \
bgp_damp.c bgp_table.c bgp_advertise.c bgp_vty.c bgp_mpath.c \
bgp_nht.c bgp_updgrp.c bgp_updgrp_packet.c bgp_updgrp_adv.c bgp_bfd.c
bgp_nht.c bgp_updgrp.c bgp_updgrp_packet.c bgp_updgrp_adv.c bgp_bfd.c \
bgp_encap_tlv.c
noinst_HEADERS = \
bgp_aspath.h bgp_attr.h bgp_community.h bgp_debug.h bgp_fsm.h \
@ -24,7 +25,7 @@ noinst_HEADERS = \
bgpd.h bgp_filter.h bgp_clist.h bgp_dump.h bgp_zebra.h \
bgp_ecommunity.h bgp_mplsvpn.h bgp_nexthop.h bgp_damp.h bgp_table.h \
bgp_advertise.h bgp_snmp.h bgp_vty.h bgp_mpath.h bgp_nht.h \
bgp_updgrp.h bgp_bfd.h
bgp_updgrp.h bgp_bfd.h bgp_encap_tlv.h bgp_encap_types.h
bgpd_SOURCES = bgp_main.c
bgpd_LDADD = libbgp.a ../lib/libzebra.la @LIBCAP@ @LIBM@

324
bgpd/bgp_attr.c
View File

@ -30,6 +30,7 @@ Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
#include "hash.h"
#include "jhash.h"
#include "queue.h"
#include "table.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_attr.h"
@ -40,6 +41,7 @@ Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
#include "bgpd/bgp_packet.h"
#include "bgpd/bgp_ecommunity.h"
#include "bgpd/bgp_updgrp.h"
#include "bgp_encap_types.h"
/* Attribute strings for logging. */
static const struct message attr_str [] =
@ -63,6 +65,7 @@ static const struct message attr_str [] =
{ BGP_ATTR_AS4_PATH, "AS4_PATH" },
{ BGP_ATTR_AS4_AGGREGATOR, "AS4_AGGREGATOR" },
{ BGP_ATTR_AS_PATHLIMIT, "AS_PATHLIMIT" },
{ BGP_ATTR_ENCAP, "ENCAP" },
};
static const int attr_str_max = array_size(attr_str);
@ -207,6 +210,105 @@ cluster_finish (void)
cluster_hash = NULL;
}
struct bgp_attr_encap_subtlv *
encap_tlv_dup(struct bgp_attr_encap_subtlv *orig)
{
struct bgp_attr_encap_subtlv *new;
struct bgp_attr_encap_subtlv *tail;
struct bgp_attr_encap_subtlv *p;
for (p = orig, tail = new = NULL; p; p = p->next) {
int size = sizeof(struct bgp_attr_encap_subtlv) - 1 + p->length;
if (tail) {
tail->next = XCALLOC(MTYPE_ENCAP_TLV, size);
tail = tail->next;
} else {
tail = new = XCALLOC(MTYPE_ENCAP_TLV, size);
}
assert(tail);
memcpy(tail, p, size);
tail->next = NULL;
}
return new;
}
static void
encap_free(struct bgp_attr_encap_subtlv *p)
{
struct bgp_attr_encap_subtlv *next;
while (p) {
next = p->next;
p->next = NULL;
XFREE(MTYPE_ENCAP_TLV, p);
p = next;
}
}
void
bgp_attr_flush_encap(struct attr *attr)
{
if (!attr || !attr->extra)
return;
if (attr->extra->encap_subtlvs) {
encap_free(attr->extra->encap_subtlvs);
attr->extra->encap_subtlvs = NULL;
}
}
/*
* Compare encap sub-tlv chains
*
* 1 = equivalent
* 0 = not equivalent
*
* This algorithm could be made faster if needed
*/
static int
encap_same(struct bgp_attr_encap_subtlv *h1, struct bgp_attr_encap_subtlv *h2)
{
struct bgp_attr_encap_subtlv *p;
struct bgp_attr_encap_subtlv *q;
if (!h1 && !h2)
return 1;
if (h1 && !h2)
return 0;
if (!h1 && h2)
return 0;
if (h1 == h2)
return 1;
for (p = h1; p; p = p->next) {
for (q = h2; q; q = q->next) {
if ((p->type == q->type) &&
(p->length == q->length) &&
!memcmp(p->value, q->value, p->length)) {
break;
}
}
if (!q)
return 0;
}
for (p = h2; p; p = p->next) {
for (q = h1; q; q = q->next) {
if ((p->type == q->type) &&
(p->length == q->length) &&
!memcmp(p->value, q->value, p->length)) {
break;
}
}
if (!q)
return 0;
}
return 1;
}
/* Unknown transit attribute. */
static struct hash *transit_hash;
@ -314,6 +416,10 @@ bgp_attr_extra_free (struct attr *attr)
{
if (attr->extra)
{
if (attr->extra->encap_subtlvs) {
encap_free(attr->extra->encap_subtlvs);
attr->extra->encap_subtlvs = NULL;
}
XFREE (MTYPE_ATTR_EXTRA, attr->extra);
attr->extra = NULL;
}
@ -349,13 +455,20 @@ bgp_attr_dup (struct attr *new, struct attr *orig)
{
new->extra = extra;
memset(new->extra, 0, sizeof(struct attr_extra));
if (orig->extra)
if (orig->extra) {
*new->extra = *orig->extra;
if (orig->extra->encap_subtlvs) {
new->extra->encap_subtlvs = encap_tlv_dup(orig->extra->encap_subtlvs);
}
}
}
else if (orig->extra)
{
new->extra = bgp_attr_extra_new();
*new->extra = *orig->extra;
if (orig->extra->encap_subtlvs) {
new->extra->encap_subtlvs = encap_tlv_dup(orig->extra->encap_subtlvs);
}
}
}
@ -495,6 +608,8 @@ attrhash_cmp (const void *p1, const void *p2)
&& ae1->ecommunity == ae2->ecommunity
&& ae1->cluster == ae2->cluster
&& ae1->transit == ae2->transit
&& (ae1->encap_tunneltype == ae2->encap_tunneltype)
&& encap_same(ae1->encap_subtlvs, ae2->encap_subtlvs)
&& IPV4_ADDR_SAME (&ae1->originator_id, &ae2->originator_id))
return 1;
else if (ae1 || ae2)
@ -549,6 +664,10 @@ bgp_attr_hash_alloc (void *p)
{
attr->extra = bgp_attr_extra_new ();
*attr->extra = *val->extra;
if (attr->extra->encap_subtlvs) {
attr->extra->encap_subtlvs = encap_tlv_dup(attr->extra->encap_subtlvs);
}
}
attr->refcnt = 0;
return attr;
@ -673,6 +792,9 @@ bgp_attr_default_intern (u_char origin)
struct attr attr;
struct attr *new;
memset (&attr, 0, sizeof (struct attr));
bgp_attr_extra_get (&attr);
bgp_attr_default_set(&attr, origin);
new = bgp_attr_intern (&attr);
@ -814,6 +936,8 @@ bgp_attr_flush (struct attr *attr)
cluster_free (attre->cluster);
if (attre->transit && ! attre->transit->refcnt)
transit_free (attre->transit);
encap_free(attre->encap_subtlvs);
attre->encap_subtlvs = NULL;
}
}
@ -1771,6 +1895,118 @@ bgp_attr_ext_communities (struct bgp_attr_parser_args *args)
return BGP_ATTR_PARSE_PROCEED;
}
/* Parse Tunnel Encap attribute in an UPDATE */
static int
bgp_attr_encap(
uint8_t type,
struct peer *peer, /* IN */
bgp_size_t length, /* IN: attr's length field */
struct attr *attr, /* IN: caller already allocated */
u_char flag, /* IN: attr's flags field */
u_char *startp)
{
bgp_size_t total;
struct attr_extra *attre = NULL;
struct bgp_attr_encap_subtlv *stlv_last = NULL;
uint16_t tunneltype;
total = length + (CHECK_FLAG (flag, BGP_ATTR_FLAG_EXTLEN) ? 4 : 3);
if (!CHECK_FLAG(flag, BGP_ATTR_FLAG_TRANS)
|| !CHECK_FLAG(flag, BGP_ATTR_FLAG_OPTIONAL))
{
zlog_info ("Tunnel Encap attribute flag isn't optional and transitive %d", flag);
bgp_notify_send_with_data (peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_ATTR_FLAG_ERR,
startp, total);
return -1;
}
if (BGP_ATTR_ENCAP == type) {
/* read outer TLV type and length */
uint16_t tlv_length;
if (length < 4) {
zlog_info ("Tunnel Encap attribute not long enough to contain outer T,L");
bgp_notify_send_with_data(peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
startp, total);
return -1;
}
tunneltype = stream_getw (BGP_INPUT (peer));
tlv_length = stream_getw (BGP_INPUT (peer));
length -= 4;
if (tlv_length != length) {
zlog_info ("%s: tlv_length(%d) != length(%d)",
__func__, tlv_length, length);
}
}
while (length >= 4) {
uint16_t subtype;
uint16_t sublength;
struct bgp_attr_encap_subtlv *tlv;
subtype = stream_getw (BGP_INPUT (peer));
sublength = stream_getw (BGP_INPUT (peer));
length -= 4;
if (sublength > length) {
zlog_info ("Tunnel Encap attribute sub-tlv length %d exceeds remaining length %d",
sublength, length);
bgp_notify_send_with_data (peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
startp, total);
return -1;
}
/* alloc and copy sub-tlv */
/* TBD make sure these are freed when attributes are released */
tlv = XCALLOC (MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv)-1+sublength);
tlv->type = subtype;
tlv->length = sublength;
stream_get(tlv->value, peer->ibuf, sublength);
length -= sublength;
/* attach tlv to encap chain */
if (!attre) {
attre = bgp_attr_extra_get(attr);
if (BGP_ATTR_ENCAP == type) {
for (stlv_last = attre->encap_subtlvs; stlv_last && stlv_last->next;
stlv_last = stlv_last->next);
if (stlv_last) {
stlv_last->next = tlv;
} else {
attre->encap_subtlvs = tlv;
}
}
} else {
stlv_last->next = tlv;
}
stlv_last = tlv;
}
if (attre && (BGP_ATTR_ENCAP == type)) {
attre->encap_tunneltype = tunneltype;
}
if (length) {
/* spurious leftover data */
zlog_info ("Tunnel Encap attribute length is bad: %d leftover octets", length);
bgp_notify_send_with_data (peer,
BGP_NOTIFY_UPDATE_ERR,
BGP_NOTIFY_UPDATE_OPT_ATTR_ERR,
startp, total);
return -1;
}
return 0;
}
/* BGP unknown attribute treatment. */
static bgp_attr_parse_ret_t
bgp_attr_unknown (struct bgp_attr_parser_args *args)
@ -2060,6 +2296,9 @@ bgp_attr_parse (struct peer *peer, struct attr *attr, bgp_size_t size,
case BGP_ATTR_EXT_COMMUNITIES:
ret = bgp_attr_ext_communities (&attr_args);
break;
case BGP_ATTR_ENCAP:
ret = bgp_attr_encap (type, peer, length, attr, flag, startp);
break;
default:
ret = bgp_attr_unknown (&attr_args);
break;
@ -2316,6 +2555,89 @@ bgp_packet_mpattr_prefix_size (afi_t afi, safi_t safi, struct prefix *p)
return size;
}
#if 0
/*
* Encodes the tunnel encapsulation attribute
*/
static void
bgp_packet_mpattr_tea(
struct bgp *bgp,
struct peer *peer,
struct stream *s,
struct attr *attr,
uint8_t attrtype)
{
unsigned int attrlenfield = 0;
struct bgp_attr_encap_subtlv *subtlvs;
struct bgp_attr_encap_subtlv *st;
const char *attrname;
if (!attr || !attr->extra)
return;
switch (attrtype) {
case BGP_ATTR_ENCAP:
attrname = "Tunnel Encap";
subtlvs = attr->extra->encap_subtlvs;
/*
* The tunnel encap attr has an "outer" tlv.
* T = tunneltype,
* L = total length of subtlvs,
* V = concatenated subtlvs.
*/
attrlenfield = 2 + 2; /* T + L */
break;
default:
assert(0);
}
/* compute attr length */
for (st = subtlvs; st; st = st->next) {
attrlenfield += (4 + st->length);
}
/* if no tlvs, don't make attr */
if (!attrlenfield)
return;
if (attrlenfield > 0xffff) {
zlog_info ("%s attribute is too long (length=%d), can't send it",
attrname,
attrlenfield);
return;
}
if (attrlenfield > 0xff) {
/* 2-octet length field */
stream_putc (s,
BGP_ATTR_FLAG_TRANS|BGP_ATTR_FLAG_OPTIONAL|BGP_ATTR_FLAG_EXTLEN);
stream_putc (s, attrtype);
stream_putw (s, attrlenfield & 0xffff);
} else {
/* 1-octet length field */
stream_putc (s, BGP_ATTR_FLAG_TRANS|BGP_ATTR_FLAG_OPTIONAL);
stream_putc (s, attrtype);
stream_putc (s, attrlenfield & 0xff);
}
if (attrtype == BGP_ATTR_ENCAP) {
/* write outer T+L */
stream_putw(s, attr->extra->encap_tunneltype);
stream_putw(s, attrlenfield - 4);
}
/* write each sub-tlv */
for (st = subtlvs; st; st = st->next) {
stream_putw (s, st->type);
stream_putw (s, st->length);
stream_put (s, st->value, st->length);
}
}
#endif
void
bgp_packet_mpattr_end (struct stream *s, size_t sizep)
{

17
bgpd/bgp_attr.h
View File

@ -55,6 +55,14 @@ Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
#define BGP_ATTR_NHLEN_VPNV6_GLOBAL 8+IPV6_MAX_BYTELEN
#define BGP_ATTR_NHLEN_VPNV6_GLOBAL_AND_LL ((8+IPV6_MAX_BYTELEN) * 2)
struct bgp_attr_encap_subtlv {
struct bgp_attr_encap_subtlv *next; /* for chaining */
uint16_t type;
uint16_t length;
uint8_t value[1]; /* will be extended */
};
/* Additional/uncommon BGP attributes.
* lazily allocated as and when a struct attr
* requires it.
@ -93,6 +101,9 @@ struct attr_extra
/* route tag */
u_short tag;
uint16_t encap_tunneltype; /* grr */
struct bgp_attr_encap_subtlv *encap_subtlvs; /* rfc5512 */
};
/* BGP core attribute structure. */
@ -225,6 +236,12 @@ extern int bgp_mp_reach_parse (struct bgp_attr_parser_args *args,
extern int bgp_mp_unreach_parse (struct bgp_attr_parser_args *args,
struct bgp_nlri *);
extern struct bgp_attr_encap_subtlv *
encap_tlv_dup(struct bgp_attr_encap_subtlv *orig);
extern void
bgp_attr_flush_encap(struct attr *attr);
/**
* Set of functions to encode MP_REACH_NLRI and MP_UNREACH_NLRI attributes.
* Typical call sequence is to call _start(), followed by multiple _prefix(),

874
bgpd/bgp_encap_tlv.c Normal file
View File

@ -0,0 +1,874 @@
/*
* Copyright 2015, LabN Consulting, L.L.C.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#include <zebra.h>
#include "memory.h"
#include "prefix.h"
#include "vty.h"
#include "filter.h"
#include "bgpd.h"
#include "bgp_attr.h"
#include "bgp_encap_types.h"
#include "bgp_encap_tlv.h"
/***********************************************************************
* SUBTLV ENCODE
***********************************************************************/
/* rfc5512 4.1 */
static struct bgp_attr_encap_subtlv *
subtlv_encode_encap_l2tpv3_over_ip(
struct bgp_tea_subtlv_encap_l2tpv3_over_ip *st)
{
struct bgp_attr_encap_subtlv *new;
uint8_t *p;
int total = 4 + st->cookie_length;
/* sanity check */
assert(st->cookie_length <= sizeof(st->cookie));
assert(total <= 0xff);
new = XCALLOC(MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv) - 1 + total);
assert(new);
new->type = BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION;
new->length = total;
p = new->value;
*p++ = (st->sessionid & 0xff000000) >> 24;
*p++ = (st->sessionid & 0xff0000) >> 16;
*p++ = (st->sessionid & 0xff00) >> 8;
*p++ = (st->sessionid & 0xff);
memcpy(p, st->cookie, st->cookie_length);
return new;
}
/* rfc5512 4.1 */
static struct bgp_attr_encap_subtlv *
subtlv_encode_encap_gre(
struct bgp_tea_subtlv_encap_gre_key *st)
{
struct bgp_attr_encap_subtlv *new;
uint8_t *p;
int total = 4;
assert(total <= 0xff);
new = XCALLOC(MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv) - 1 + total);
assert(new);
new->type = BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION;
new->length = total;
p = new->value;
*p++ = (st->gre_key & 0xff000000) >> 24;
*p++ = (st->gre_key & 0xff0000) >> 16;
*p++ = (st->gre_key & 0xff00) >> 8;
*p++ = (st->gre_key & 0xff);
return new;
}
static struct bgp_attr_encap_subtlv *
subtlv_encode_encap_pbb(
struct bgp_tea_subtlv_encap_pbb *st)
{
struct bgp_attr_encap_subtlv *new;
uint8_t *p;
int total = 1 + 3 + 6 + 2; /* flags + isid + madaddr + vid */
assert(total <= 0xff);
new = XCALLOC(MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv) - 1 + total);
assert(new);
new->type = BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION;
new->length = total;
p = new->value;
*p++ = (st->flag_isid? 0x80: 0) |
(st->flag_vid? 0x40: 0) |
0;
if (st->flag_isid) {
*p = (st->isid & 0xff0000) >> 16;
*(p+1) = (st->isid & 0xff00) >> 8;
*(p+2) = (st->isid & 0xff);
}
p += 3;
memcpy(p, st->macaddr, 6);
p += 6;
if (st->flag_vid) {
*p++ = (st->vid & 0xf00) >> 8;
*p++ = st->vid & 0xff;
}
return new;
}
/* rfc5512 4.2 */
static struct bgp_attr_encap_subtlv *
subtlv_encode_proto_type(
struct bgp_tea_subtlv_proto_type *st)
{
struct bgp_attr_encap_subtlv *new;
uint8_t *p;
int total = 2;
assert(total <= 0xff);
new = XCALLOC(MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv) - 1 + total);
assert(new);
new->type = BGP_ENCAP_SUBTLV_TYPE_PROTO_TYPE;
new->length = total;
p = new->value;
*p++ = (st->proto & 0xff00) >> 8;
*p++ = (st->proto & 0xff);
return new;
}
/* rfc5512 4.3 */
static struct bgp_attr_encap_subtlv *
subtlv_encode_color(
struct bgp_tea_subtlv_color *st)
{
struct bgp_attr_encap_subtlv *new;
uint8_t *p;
int total = 8;
assert(total <= 0xff);
new = XCALLOC(MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv) - 1 + total);
assert(new);
new->type = BGP_ENCAP_SUBTLV_TYPE_COLOR;
new->length = total;
p = new->value;
*p++ = 0x03; /* transitive*/
*p++ = 0x0b;
*p++ = 0; /* reserved */
*p++ = 0; /* reserved */
*p++ = (st->color & 0xff000000) >> 24;
*p++ = (st->color & 0xff0000) >> 16;
*p++ = (st->color & 0xff00) >> 8;
*p++ = (st->color & 0xff);
return new;
}
/* rfc 5566 4. */
static struct bgp_attr_encap_subtlv *
subtlv_encode_ipsec_ta(
struct bgp_tea_subtlv_ipsec_ta *st)
{
struct bgp_attr_encap_subtlv *new;
uint8_t *p;
int total = 2 + st->authenticator_length;
/* sanity check */
assert(st->authenticator_length <= sizeof(st->value));
assert(total <= 0xff);
new = XCALLOC(MTYPE_ENCAP_TLV, sizeof(struct bgp_attr_encap_subtlv) - 1 + total);
assert(new);
new->type = BGP_ENCAP_SUBTLV_TYPE_IPSEC_TA;
new->length = total;
p = new->value;
*p++ = (st->authenticator_type & 0xff00) >> 8;
*p++ = st->authenticator_type & 0xff;
memcpy(p, st->value, st->authenticator_length);
return new;
}
/***********************************************************************
* TUNNEL TYPE-SPECIFIC TLV ENCODE
***********************************************************************/
/*
* requires "extra" and "last" to be defined in caller
*/
#define ENC_SUBTLV(flag, function, field) do {\
struct bgp_attr_encap_subtlv *new;\
if (CHECK_FLAG(bet->valid_subtlvs, (flag))) {\
new = function(&bet->field);\
if (last) {\
last->next = new;\
} else {\
extra->encap_subtlvs = new;\
}\
last = new;\
}\
} while (0)
void
bgp_encap_type_l2tpv3overip_to_tlv(
struct bgp_encap_type_l2tpv3_over_ip *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_L2TPV3_OVER_IP;
assert(CHECK_FLAG(bet->valid_subtlvs, BGP_TEA_SUBTLV_ENCAP));
ENC_SUBTLV(BGP_TEA_SUBTLV_ENCAP, subtlv_encode_encap_l2tpv3_over_ip, st_encap);
ENC_SUBTLV(BGP_TEA_SUBTLV_PROTO_TYPE, subtlv_encode_proto_type, st_proto);
ENC_SUBTLV(BGP_TEA_SUBTLV_COLOR, subtlv_encode_color, st_color);
}
void
bgp_encap_type_gre_to_tlv(
struct bgp_encap_type_gre *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_GRE;
ENC_SUBTLV(BGP_TEA_SUBTLV_ENCAP, subtlv_encode_encap_gre, st_encap);
ENC_SUBTLV(BGP_TEA_SUBTLV_PROTO_TYPE, subtlv_encode_proto_type, st_proto);
ENC_SUBTLV(BGP_TEA_SUBTLV_COLOR, subtlv_encode_color, st_color);
}
void
bgp_encap_type_ip_in_ip_to_tlv(
struct bgp_encap_type_ip_in_ip *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_IP_IN_IP;
ENC_SUBTLV(BGP_TEA_SUBTLV_PROTO_TYPE, subtlv_encode_proto_type, st_proto);
ENC_SUBTLV(BGP_TEA_SUBTLV_COLOR, subtlv_encode_color, st_color);
}
void
bgp_encap_type_transmit_tunnel_endpoint(
struct bgp_encap_type_transmit_tunnel_endpoint *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_TRANSMIT_TUNNEL_ENDPOINT;
/* no subtlvs for this type */
}
void
bgp_encap_type_ipsec_in_tunnel_mode_to_tlv(
struct bgp_encap_type_ipsec_in_tunnel_mode *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_IPSEC_IN_TUNNEL_MODE;
ENC_SUBTLV(BGP_TEA_SUBTLV_IPSEC_TA, subtlv_encode_ipsec_ta, st_ipsec_ta);
}
void
bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode_to_tlv(
struct bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_IP_IN_IP_TUNNEL_WITH_IPSEC_TRANSPORT_MODE;
ENC_SUBTLV(BGP_TEA_SUBTLV_IPSEC_TA, subtlv_encode_ipsec_ta, st_ipsec_ta);
}
void
bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode_to_tlv(
struct bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_MPLS_IN_IP_TUNNEL_WITH_IPSEC_TRANSPORT_MODE;
ENC_SUBTLV(BGP_TEA_SUBTLV_IPSEC_TA, subtlv_encode_ipsec_ta, st_ipsec_ta);
}
void
bgp_encap_type_pbb_to_tlv(
struct bgp_encap_type_pbb *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
struct bgp_attr_encap_subtlv *last;
/* advance to last subtlv */
for (last = extra->encap_subtlvs; last && last->next; last = last->next);
extra->encap_tunneltype = BGP_ENCAP_TYPE_PBB;
assert(CHECK_FLAG(bet->valid_subtlvs, BGP_TEA_SUBTLV_ENCAP));
ENC_SUBTLV(BGP_TEA_SUBTLV_ENCAP, subtlv_encode_encap_pbb, st_encap);
}
void
bgp_encap_type_vxlan_to_tlv(
struct bgp_encap_type_vxlan *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
extra->encap_tunneltype = BGP_ENCAP_TYPE_VXLAN;
}
void
bgp_encap_type_nvgre_to_tlv(
struct bgp_encap_type_nvgre *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
extra->encap_tunneltype = BGP_ENCAP_TYPE_NVGRE;
}
void
bgp_encap_type_mpls_to_tlv(
struct bgp_encap_type_mpls *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
extra->encap_tunneltype = BGP_ENCAP_TYPE_MPLS;
}
void
bgp_encap_type_mpls_in_gre_to_tlv(
struct bgp_encap_type_mpls_in_gre *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
extra->encap_tunneltype = BGP_ENCAP_TYPE_MPLS_IN_GRE;
}
void
bgp_encap_type_vxlan_gpe_to_tlv(
struct bgp_encap_type_vxlan_gpe *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
extra->encap_tunneltype = BGP_ENCAP_TYPE_VXLAN_GPE;
}
void
bgp_encap_type_mpls_in_udp_to_tlv(
struct bgp_encap_type_mpls_in_udp *bet, /* input structure */
struct attr *attr)
{
struct attr_extra *extra = bgp_attr_extra_get(attr);
extra->encap_tunneltype = BGP_ENCAP_TYPE_MPLS_IN_UDP;
}
/***********************************************************************
* SUBTLV DECODE
***********************************************************************/
/* rfc5512 4.1 */
static int
subtlv_decode_encap_l2tpv3_over_ip(
struct bgp_attr_encap_subtlv *subtlv,
struct bgp_tea_subtlv_encap_l2tpv3_over_ip *st)
{
if (subtlv->length < 4) {
zlog_debug("%s, subtlv length %d is less than 4",
__func__, subtlv->length);
return -1;
}
st->sessionid = (subtlv->value[0] << 24) |
(subtlv->value[1] << 16) |
(subtlv->value[2] << 8) |
subtlv->value[3];
st->cookie_length = subtlv->length - 4;
if (st->cookie_length > sizeof(st->cookie)) {
zlog_debug("%s, subtlv length %d is greater than %d",
__func__, st->cookie_length, (int)sizeof(st->cookie));
return -1;
}
memcpy(st->cookie, subtlv->value + 4, st->cookie_length);
return 0;
}
/* rfc5512 4.1 */
static int
subtlv_decode_encap_gre(
struct bgp_attr_encap_subtlv *subtlv,
struct bgp_tea_subtlv_encap_gre_key *st)
{
if (subtlv->length != 4) {
zlog_debug("%s, subtlv length %d does not equal 4",
__func__, subtlv->length);
return -1;
}
st->gre_key = (subtlv->value[0] << 24) |
(subtlv->value[1] << 16) |
(subtlv->value[2] << 8) |
subtlv->value[3];
return 0;
}
static int
subtlv_decode_encap_pbb(
struct bgp_attr_encap_subtlv *subtlv,
struct bgp_tea_subtlv_encap_pbb *st)
{
if (subtlv->length != 1 + 3 + 6 + 2) {
zlog_debug("%s, subtlv length %d does not equal %d",
__func__, subtlv->length, 1 + 3 + 6 + 2);
return -1;
}
if (subtlv->value[0] & 0x80) {
st->flag_isid = 1;
st->isid = (subtlv->value[1] << 16) |
(subtlv->value[2] << 8) |
subtlv->value[3];
}
if (subtlv->value[0] & 0x40) {
st->flag_vid = 1;
st->vid = ((subtlv->value[10] & 0x0f) << 8) | subtlv->value[11];
}
memcpy(st->macaddr, subtlv->value + 4, 6);
return 0;
}
/* rfc5512 4.2 */
static int
subtlv_decode_proto_type(
struct bgp_attr_encap_subtlv *subtlv,
struct bgp_tea_subtlv_proto_type *st)
{
if (subtlv->length != 2) {
zlog_debug("%s, subtlv length %d does not equal 2",
__func__, subtlv->length);
return -1;
}
st->proto = (subtlv->value[0] << 8) | subtlv->value[1];
return 0;
}
/* rfc5512 4.3 */
static int
subtlv_decode_color(
struct bgp_attr_encap_subtlv *subtlv,
struct bgp_tea_subtlv_color *st)
{
if (subtlv->length != 8) {
zlog_debug("%s, subtlv length %d does not equal 8",
__func__, subtlv->length);
return -1;
}
if ((subtlv->value[0] != 0x03) ||
(subtlv->value[1] != 0x0b) ||
(subtlv->value[2] != 0) ||
(subtlv->value[3] != 0)) {
zlog_debug("%s, subtlv value 1st 4 bytes are not 0x030b0000", __func__);
return -1;
}
st->color = (subtlv->value[4] << 24) |
(subtlv->value[5] << 16) |
(subtlv->value[6] << 8) |
subtlv->value[7];
return 0;
}
/* rfc 5566 4. */
static int
subtlv_decode_ipsec_ta(
struct bgp_attr_encap_subtlv *subtlv,
struct bgp_tea_subtlv_ipsec_ta *st)
{
st->authenticator_length = subtlv->length - 2;
if (st->authenticator_length > sizeof(st->value)) {
zlog_debug("%s, authenticator length %d exceeds storage maximum %d",
__func__, st->authenticator_length, (int)sizeof(st->value));
return -1;
}
st->authenticator_type = (subtlv->value[0] << 8) | subtlv->value[1];
memcpy(st->value, subtlv->value + 2, st->authenticator_length);
return 0;
}
/***********************************************************************
* TUNNEL TYPE-SPECIFIC TLV DECODE
***********************************************************************/
int
tlv_to_bgp_encap_type_l2tpv3overip(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_l2tpv3_over_ip *bet) /* caller-allocated */
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION:
rc |= subtlv_decode_encap_l2tpv3_over_ip(st, &bet->st_encap);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_ENCAP;
break;
case BGP_ENCAP_SUBTLV_TYPE_PROTO_TYPE:
rc |= subtlv_decode_proto_type(st, &bet->st_proto);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_PROTO_TYPE;
break;
case BGP_ENCAP_SUBTLV_TYPE_COLOR:
rc |= subtlv_decode_color(st, &bet->st_color);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_COLOR;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_gre(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_gre *bet) /* caller-allocated */
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION:
rc |= subtlv_decode_encap_gre(st, &bet->st_encap);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_ENCAP;
break;
case BGP_ENCAP_SUBTLV_TYPE_PROTO_TYPE:
rc |= subtlv_decode_proto_type(st, &bet->st_proto);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_PROTO_TYPE;
break;
case BGP_ENCAP_SUBTLV_TYPE_COLOR:
rc |= subtlv_decode_color(st, &bet->st_color);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_COLOR;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_ip_in_ip(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_ip_in_ip *bet) /* caller-allocated */
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_PROTO_TYPE:
rc |= subtlv_decode_proto_type(st, &bet->st_proto);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_PROTO_TYPE;
break;
case BGP_ENCAP_SUBTLV_TYPE_COLOR:
rc |= subtlv_decode_color(st, &bet->st_color);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_COLOR;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_transmit_tunnel_endpoint(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_transmit_tunnel_endpoint *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_ipsec_in_tunnel_mode(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_ipsec_in_tunnel_mode *bet) /* caller-allocated */
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_IPSEC_TA:
rc |= subtlv_decode_ipsec_ta(st, &bet->st_ipsec_ta);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_IPSEC_TA;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_IPSEC_TA:
rc |= subtlv_decode_ipsec_ta(st, &bet->st_ipsec_ta);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_IPSEC_TA;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_IPSEC_TA:
rc |= subtlv_decode_ipsec_ta(st, &bet->st_ipsec_ta);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_IPSEC_TA;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_vxlan(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_vxlan *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_nvgre(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_nvgre *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_mpls(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_mpls_in_gre(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls_in_gre *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_vxlan_gpe(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_vxlan_gpe *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_mpls_in_udp(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls_in_udp *bet)
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}
int
tlv_to_bgp_encap_type_pbb(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_pbb *bet) /* caller-allocated */
{
struct bgp_attr_encap_subtlv *st;
int rc = 0;
for (st = stlv; st; st = st->next) {
switch (st->type) {
case BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION:
rc |= subtlv_decode_encap_pbb(st, &bet->st_encap);
bet->valid_subtlvs |= BGP_TEA_SUBTLV_ENCAP;
break;
default:
zlog_debug("%s: unexpected subtlv type %d", __func__, st->type);
rc |= -1;
break;
}
}
return rc;
}

177
bgpd/bgp_encap_tlv.h Normal file
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@ -0,0 +1,177 @@
/*
* Copyright 2015, LabN Consulting, L.L.C.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef _QUAGGA_BGP_ENCAP_TLV_H
#define _QUAGGA_BGP_ENCAP_TLV_H
/***********************************************************************
* TUNNEL TYPE-SPECIFIC TLV ENCODE
***********************************************************************/
extern void
bgp_encap_type_l2tpv3overip_to_tlv(
struct bgp_encap_type_l2tpv3_over_ip *bet,
struct attr *attr);
extern void
bgp_encap_type_gre_to_tlv(
struct bgp_encap_type_gre *bet,
struct attr *attr);
extern void
bgp_encap_type_ip_in_ip_to_tlv(
struct bgp_encap_type_ip_in_ip *bet,
struct attr *attr);
extern void
bgp_encap_type_transmit_tunnel_endpoint(
struct bgp_encap_type_transmit_tunnel_endpoint *bet,
struct attr *attr);
extern void
bgp_encap_type_ipsec_in_tunnel_mode_to_tlv(
struct bgp_encap_type_ipsec_in_tunnel_mode *bet,
struct attr *attr);
extern void
bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode_to_tlv(
struct bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode *bet,
struct attr *attr);
extern void
bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode_to_tlv(
struct bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode *bet,
struct attr *attr);
extern void
bgp_encap_type_pbb_to_tlv(
struct bgp_encap_type_pbb *bet,
struct attr *attr);
extern void
bgp_encap_type_vxlan_to_tlv(
struct bgp_encap_type_vxlan *bet,
struct attr *attr);
extern void
bgp_encap_type_nvgre_to_tlv(
struct bgp_encap_type_nvgre *bet,
struct attr *attr);
extern void
bgp_encap_type_mpls_to_tlv(
struct bgp_encap_type_mpls *bet,
struct attr *attr);
extern void
bgp_encap_type_mpls_in_gre_to_tlv(
struct bgp_encap_type_mpls_in_gre *bet,
struct attr *attr);
extern void
bgp_encap_type_vxlan_gpe_to_tlv(
struct bgp_encap_type_vxlan_gpe *bet,
struct attr *attr);
extern void
bgp_encap_type_mpls_in_udp_to_tlv(
struct bgp_encap_type_mpls_in_udp *bet,
struct attr *attr);
/***********************************************************************
* TUNNEL TYPE-SPECIFIC TLV DECODE
***********************************************************************/
extern int
tlv_to_bgp_encap_type_l2tpv3overip(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_l2tpv3_over_ip *bet); /* caller-allocated */
extern int
tlv_to_bgp_encap_type_gre(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_gre *bet); /* caller-allocated */
extern int
tlv_to_bgp_encap_type_ip_in_ip(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_ip_in_ip *bet); /* caller-allocated */
extern int
tlv_to_bgp_encap_type_transmit_tunnel_endpoint(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_transmit_tunnel_endpoint *bet);
extern int
tlv_to_bgp_encap_type_ipsec_in_tunnel_mode(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_ipsec_in_tunnel_mode *bet); /* caller-allocated */
extern int
tlv_to_bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode *bet);
extern int
tlv_to_bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode *bet);
extern int
tlv_to_bgp_encap_type_vxlan(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_vxlan *bet);
extern int
tlv_to_bgp_encap_type_nvgre(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_nvgre *bet);
extern int
tlv_to_bgp_encap_type_mpls(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls *bet);
extern int
tlv_to_bgp_encap_type_mpls(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls *bet);
extern int
tlv_to_bgp_encap_type_mpls_in_gre(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls_in_gre *bet);
extern int
tlv_to_bgp_encap_type_vxlan_gpe(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_vxlan_gpe *bet);
extern int
tlv_to_bgp_encap_type_mpls_in_udp(
struct bgp_attr_encap_subtlv *stlv,
struct bgp_encap_type_mpls_in_udp *bet);
extern int
tlv_to_bgp_encap_type_pbb(
struct bgp_attr_encap_subtlv *stlv, /* subtlv chain */
struct bgp_encap_type_pbb *bet); /* caller-allocated */
#endif /* _QUAGGA_BGP_ENCAP_TLV_H */

174
bgpd/bgp_encap_types.h Normal file
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@ -0,0 +1,174 @@
/*
* Copyright 2015, LabN Consulting, L.L.C.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef _QUAGGA_BGP_ENCAP_TYPES_H
#define _QUAGGA_BGP_ENCAP_TYPES_H
/* from http://www.iana.org/assignments/bgp-parameters/bgp-parameters.xhtml#tunnel-types */
typedef enum {
BGP_ENCAP_TYPE_RESERVED=0,
BGP_ENCAP_TYPE_L2TPV3_OVER_IP=1,
BGP_ENCAP_TYPE_GRE=2,
BGP_ENCAP_TYPE_TRANSMIT_TUNNEL_ENDPOINT=3,
BGP_ENCAP_TYPE_IPSEC_IN_TUNNEL_MODE=4,
BGP_ENCAP_TYPE_IP_IN_IP_TUNNEL_WITH_IPSEC_TRANSPORT_MODE=5,
BGP_ENCAP_TYPE_MPLS_IN_IP_TUNNEL_WITH_IPSEC_TRANSPORT_MODE=6,
BGP_ENCAP_TYPE_IP_IN_IP=7,
BGP_ENCAP_TYPE_VXLAN=8,
BGP_ENCAP_TYPE_NVGRE=9,
BGP_ENCAP_TYPE_MPLS=10,
BGP_ENCAP_TYPE_MPLS_IN_GRE=11,
BGP_ENCAP_TYPE_VXLAN_GPE=12,
BGP_ENCAP_TYPE_MPLS_IN_UDP=13,
BGP_ENCAP_TYPE_PBB
} bgp_encap_types;
typedef enum {
BGP_ENCAP_SUBTLV_TYPE_ENCAPSULATION=1,
BGP_ENCAP_SUBTLV_TYPE_PROTO_TYPE=2,
BGP_ENCAP_SUBTLV_TYPE_IPSEC_TA=3,
BGP_ENCAP_SUBTLV_TYPE_COLOR=4,
} bgp_encap_subtlv_types;
/*
* Tunnel Encapsulation Attribute subtlvs
*/
struct bgp_tea_subtlv_encap_l2tpv3_over_ip {
uint32_t sessionid;
uint8_t cookie_length;
uint8_t cookie[8];
};
struct bgp_tea_subtlv_encap_gre_key {
uint32_t gre_key;
};
struct bgp_tea_subtlv_encap_pbb {
uint32_t flag_isid:1;
uint32_t flag_vid:1;
uint32_t isid:24;
uint16_t vid:12;
uint8_t macaddr[6];
};
struct bgp_tea_subtlv_proto_type {
uint16_t proto; /* ether-type */
};
struct bgp_tea_subtlv_color {
uint32_t color;
};
/*
* This is the length of the value part of the ipsec tunnel authenticator
* subtlv. Currently we only support the length for authenticator type 1.
*/
#define BGP_ENCAP_SUBTLV_IPSEC_TA_SIZE 20
struct bgp_tea_subtlv_ipsec_ta {
uint16_t authenticator_type; /* only type 1 is supported so far */
uint8_t authenticator_length; /* octets in value field */
uint8_t value[BGP_ENCAP_SUBTLV_IPSEC_TA_SIZE];
};
/*
* Subtlv valid flags
* TBD change names to add "VALID"
*/
#define BGP_TEA_SUBTLV_ENCAP 0x00000001
#define BGP_TEA_SUBTLV_PROTO_TYPE 0x00000002
#define BGP_TEA_SUBTLV_COLOR 0x00000004
#define BGP_TEA_SUBTLV_IPSEC_TA 0x00000008
/*
* Tunnel Type-specific APIs
*/
struct bgp_encap_type_reserved {
};
struct bgp_encap_type_l2tpv3_over_ip {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_encap_l2tpv3_over_ip st_encap;
struct bgp_tea_subtlv_proto_type st_proto; /* optional */
struct bgp_tea_subtlv_color st_color; /* optional */
};
struct bgp_encap_type_gre {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_encap_gre_key st_encap; /* optional */
struct bgp_tea_subtlv_proto_type st_proto; /* optional */
struct bgp_tea_subtlv_color st_color; /* optional */
};
struct bgp_encap_type_ip_in_ip {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_proto_type st_proto; /* optional */
struct bgp_tea_subtlv_color st_color; /* optional */
};
struct bgp_encap_type_transmit_tunnel_endpoint {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_ipsec_in_tunnel_mode {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_ipsec_ta st_ipsec_ta; /* optional */
};
struct bgp_encap_type_ip_in_ip_tunnel_with_ipsec_transport_mode {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_ipsec_ta st_ipsec_ta; /* optional */
};
struct bgp_encap_type_mpls_in_ip_tunnel_with_ipsec_transport_mode {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_ipsec_ta st_ipsec_ta; /* optional */
};
struct bgp_encap_type_vxlan {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_nvgre {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_mpls {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_mpls_in_gre {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_vxlan_gpe {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_mpls_in_udp {
/* No subtlvs defined in spec? */
};
struct bgp_encap_type_pbb {
uint32_t valid_subtlvs;
struct bgp_tea_subtlv_encap_pbb st_encap;
};
#endif /* _QUAGGA_BGP_ENCAP_TYPES_H */

1
bgpd/bgpd.h
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@ -936,6 +936,7 @@ struct bgp_nlri
#define BGP_ATTR_AS4_PATH 17
#define BGP_ATTR_AS4_AGGREGATOR 18
#define BGP_ATTR_AS_PATHLIMIT 21
#define BGP_ATTR_ENCAP 23
/* BGP update origin. */
#define BGP_ORIGIN_IGP 0

1
lib/memtypes.c
View File

@ -175,6 +175,7 @@ struct memory_list memory_list_bgp[] =
{ MTYPE_BGP_REDIST, "BGP redistribution" },
{ MTYPE_BGP_FILTER_NAME, "BGP Filter Information" },
{ MTYPE_BGP_DUMP_STR, "BGP Dump String Information" },
{ MTYPE_ENCAP_TLV, "ENCAP TLV", },
{ -1, NULL }
};