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/* MPLS-VPN
Copyright (C) 2000 Kunihiro Ishiguro <kunihiro@zebra.org>
This file is part of GNU Zebra.
GNU Zebra 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, or (at your option) any
later version.
GNU Zebra 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 GNU Zebra; see the file COPYING. If not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#include <zebra.h>
#include "command.h"
#include "prefix.h"
#include "log.h"
#include "memory.h"
#include "stream.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_mplsvpn.h"
static u_int16_t
decode_rd_type (u_char *pnt)
{
u_int16_t v;
v = ((u_int16_t) *pnt++ << 8);
v |= (u_int16_t) *pnt;
return v;
}
u_int32_t
decode_label (u_char *pnt)
{
u_int32_t l;
l = ((u_int32_t) *pnt++ << 12);
l |= (u_int32_t) *pnt++ << 4;
l |= (u_int32_t) ((*pnt & 0xf0) >> 4);
return l;
}
static void
decode_rd_as (u_char *pnt, struct rd_as *rd_as)
{
rd_as->as = (u_int16_t) *pnt++ << 8;
rd_as->as |= (u_int16_t) *pnt++;
rd_as->val = ((u_int32_t) *pnt++ << 24);
rd_as->val |= ((u_int32_t) *pnt++ << 16);
rd_as->val |= ((u_int32_t) *pnt++ << 8);
rd_as->val |= (u_int32_t) *pnt;
}
static void
decode_rd_ip (u_char *pnt, struct rd_ip *rd_ip)
{
memcpy (&rd_ip->ip, pnt, 4);
pnt += 4;
rd_ip->val = ((u_int16_t) *pnt++ << 8);
rd_ip->val |= (u_int16_t) *pnt;
}
int
bgp_nlri_parse_vpnv4 (struct peer *peer, struct attr *attr,
struct bgp_nlri *packet)
{
u_char *pnt;
u_char *lim;
struct prefix p;
int psize;
int prefixlen;
u_int32_t label;
u_int16_t type;
struct rd_as rd_as;
struct rd_ip rd_ip;
struct prefix_rd prd;
u_char *tagpnt;
/* Check peer status. */
if (peer->status != Established)
return 0;
/* Make prefix_rd */
prd.family = AF_UNSPEC;
prd.prefixlen = 64;
pnt = packet->nlri;
lim = pnt + packet->length;
for (; pnt < lim; pnt += psize)
{
/* Clear prefix structure. */
memset (&p, 0, sizeof (struct prefix));
/* Fetch prefix length. */
prefixlen = *pnt++;
p.family = AF_INET;
psize = PSIZE (prefixlen);
if (prefixlen < 88)
{
zlog_err ("prefix length is less than 88: %d", prefixlen);
return -1;
}
label = decode_label (pnt);
/* Copyr label to prefix. */
tagpnt = pnt;;
/* Copy routing distinguisher to rd. */
memcpy (&prd.val, pnt + 3, 8);
/* Decode RD type. */
type = decode_rd_type (pnt + 3);
/* Decode RD value. */
if (type == RD_TYPE_AS)
decode_rd_as (pnt + 5, &rd_as);
else if (type == RD_TYPE_IP)
decode_rd_ip (pnt + 5, &rd_ip);
else
{
zlog_err ("Invalid RD type %d", type);
return -1;
}
p.prefixlen = prefixlen - 88;
memcpy (&p.u.prefix, pnt + 11, psize - 11);
#if 0
if (type == RD_TYPE_AS)
zlog_info ("prefix %ld:%ld:%ld:%s/%d", label, rd_as.as, rd_as.val,
inet_ntoa (p.u.prefix4), p.prefixlen);
else if (type == RD_TYPE_IP)
zlog_info ("prefix %ld:%s:%ld:%s/%d", label, inet_ntoa (rd_ip.ip),
rd_ip.val, inet_ntoa (p.u.prefix4), p.prefixlen);
#endif /* 0 */
if (pnt + psize > lim)
return -1;
if (attr)
bgp_update (peer, &p, attr, AFI_IP, SAFI_MPLS_VPN,
ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, &prd, tagpnt, 0);
else
bgp_withdraw (peer, &p, attr, AFI_IP, SAFI_MPLS_VPN,
ZEBRA_ROUTE_BGP, BGP_ROUTE_NORMAL, &prd, tagpnt);
}
/* Packet length consistency check. */
if (pnt != lim)
return -1;
return 0;
}
int
str2prefix_rd (const char *str, struct prefix_rd *prd)
{
int ret;
char *p;
char *p2;
struct stream *s;
char *half;
struct in_addr addr;
s = stream_new (8);
prd->family = AF_UNSPEC;
prd->prefixlen = 64;
p = strchr (str, ':');
if (! p)
return 0;
if (! all_digit (p + 1))
return 0;
half = XMALLOC (MTYPE_TMP, (p - str) + 1);
memcpy (half, str, (p - str));
half[p - str] = '\0';
p2 = strchr (str, '.');
if (! p2)
{
if (! all_digit (half))
{
XFREE (MTYPE_TMP, half);
return 0;
}
stream_putw (s, RD_TYPE_AS);
stream_putw (s, atoi (half));
stream_putl (s, atol (p + 1));
}
else
{
ret = inet_aton (half, &addr);
if (! ret)
{
XFREE (MTYPE_TMP, half);
return 0;
}
stream_putw (s, RD_TYPE_IP);
stream_put_in_addr (s, &addr);
stream_putw (s, atol (p + 1));
}
memcpy (prd->val, s->data, 8);
return 1;
}
int
str2tag (const char *str, u_char *tag)
{
unsigned long l;
char *endptr;
u_int32_t t;
if (*str == '-')
return 0;
errno = 0;
l = strtoul (str, &endptr, 10);
if (*endptr != '\0' || errno || l > UINT32_MAX)
return 0;
t = (u_int32_t) l;
tag[0] = (u_char)(t >> 12);
tag[1] = (u_char)(t >> 4);
tag[2] = (u_char)(t << 4);
return 1;
}
char *
prefix_rd2str (struct prefix_rd *prd, char *buf, size_t size)
{
u_char *pnt;
u_int16_t type;
struct rd_as rd_as;
struct rd_ip rd_ip;
if (size < RD_ADDRSTRLEN)
return NULL;
pnt = prd->val;
type = decode_rd_type (pnt);
if (type == RD_TYPE_AS)
{
decode_rd_as (pnt + 2, &rd_as);
snprintf (buf, size, "%u:%d", rd_as.as, rd_as.val);
return buf;
}
else if (type == RD_TYPE_IP)
{
decode_rd_ip (pnt + 2, &rd_ip);
snprintf (buf, size, "%s:%d", inet_ntoa (rd_ip.ip), rd_ip.val);
return buf;
}
return NULL;
}
/* For testing purpose, static route of MPLS-VPN. */
DEFUN (vpnv4_network,
vpnv4_network_cmd,
"network A.B.C.D/M rd ASN:nn_or_IP-address:nn tag WORD",
"Specify a network to announce via BGP\n"
"IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
"Specify Route Distinguisher\n"
"VPN Route Distinguisher\n"
"BGP tag\n"
"tag value\n")
{
return bgp_static_set_vpnv4 (vty, argv[0], argv[1], argv[2]);
}
/* For testing purpose, static route of MPLS-VPN. */
DEFUN (no_vpnv4_network,
no_vpnv4_network_cmd,
"no network A.B.C.D/M rd ASN:nn_or_IP-address:nn tag WORD",
NO_STR
"Specify a network to announce via BGP\n"
"IP prefix <network>/<length>, e.g., 35.0.0.0/8\n"
"Specify Route Distinguisher\n"
"VPN Route Distinguisher\n"
"BGP tag\n"
"tag value\n")
{
return bgp_static_unset_vpnv4 (vty, argv[0], argv[1], argv[2]);
}
static int
show_adj_route_vpn (struct vty *vty, struct peer *peer, struct prefix_rd *prd)
{
struct bgp *bgp;
struct bgp_table *table;
struct bgp_node *rn;
struct bgp_node *rm;
struct attr *attr;
int rd_header;
int header = 1;
char v4_header[] = " Network Next Hop Metric LocPrf Weight Path%s";
bgp = bgp_get_default ();
if (bgp == NULL)
{
vty_out (vty, "No BGP process is configured%s", VTY_NEWLINE);
return CMD_WARNING;
}
for (rn = bgp_table_top (bgp->rib[AFI_IP][SAFI_MPLS_VPN]); rn;
rn = bgp_route_next (rn))
{
if (prd && memcmp (rn->p.u.val, prd->val, 8) != 0)
continue;
if ((table = rn->info) != NULL)
{
rd_header = 1;
for (rm = bgp_table_top (table); rm; rm = bgp_route_next (rm))
if ((attr = rm->info) != NULL)
{
if (header)
{
vty_out (vty, "BGP table version is 0, local router ID is %s%s",
inet_ntoa (bgp->router_id), VTY_NEWLINE);
vty_out (vty, "Status codes: s suppressed, d damped, h history, * valid, > best, i - internal%s",
VTY_NEWLINE);
vty_out (vty, "Origin codes: i - IGP, e - EGP, ? - incomplete%s%s",
VTY_NEWLINE, VTY_NEWLINE);
vty_out (vty, v4_header, VTY_NEWLINE);
header = 0;
}
if (rd_header)
{
u_int16_t type;
struct rd_as rd_as;
struct rd_ip rd_ip;
u_char *pnt;
pnt = rn->p.u.val;
/* Decode RD type. */
type = decode_rd_type (pnt);
/* Decode RD value. */
if (type == RD_TYPE_AS)
decode_rd_as (pnt + 2, &rd_as);
else if (type == RD_TYPE_IP)
decode_rd_ip (pnt + 2, &rd_ip);
vty_out (vty, "Route Distinguisher: ");
if (type == RD_TYPE_AS)
vty_out (vty, "%u:%d", rd_as.as, rd_as.val);
else if (type == RD_TYPE_IP)
vty_out (vty, "%s:%d", inet_ntoa (rd_ip.ip), rd_ip.val);
vty_out (vty, "%s", VTY_NEWLINE);
rd_header = 0;
}
route_vty_out_tmp (vty, &rm->p, attr, SAFI_MPLS_VPN);
}
}
}
return CMD_SUCCESS;
}
enum bgp_show_type
{
bgp_show_type_normal,
bgp_show_type_regexp,
bgp_show_type_prefix_list,
bgp_show_type_filter_list,
bgp_show_type_neighbor,
bgp_show_type_cidr_only,
bgp_show_type_prefix_longer,
bgp_show_type_community_all,
bgp_show_type_community,
bgp_show_type_community_exact,
bgp_show_type_community_list,
bgp_show_type_community_list_exact
};
static int
bgp_show_mpls_vpn (struct vty *vty, struct prefix_rd *prd, enum bgp_show_type type,
void *output_arg, int tags)
{
struct bgp *bgp;
struct bgp_table *table;
struct bgp_node *rn;
struct bgp_node *rm;
struct bgp_info *ri;
int rd_header;
int header = 1;
char v4_header[] = " Network Next Hop Metric LocPrf Weight Path%s";
char v4_header_tag[] = " Network Next Hop In tag/Out tag%s";
bgp = bgp_get_default ();
if (bgp == NULL)
{
vty_out (vty, "No BGP process is configured%s", VTY_NEWLINE);
return CMD_WARNING;
}
for (rn = bgp_table_top (bgp->rib[AFI_IP][SAFI_MPLS_VPN]); rn; rn = bgp_route_next (rn))
{
if (prd && memcmp (rn->p.u.val, prd->val, 8) != 0)
continue;
if ((table = rn->info) != NULL)
{
rd_header = 1;
for (rm = bgp_table_top (table); rm; rm = bgp_route_next (rm))
for (ri = rm->info; ri; ri = ri->next)
{
if (type == bgp_show_type_neighbor)
{
union sockunion *su = output_arg;
if (ri->peer->su_remote == NULL || ! sockunion_same(ri->peer->su_remote, su))
continue;
}
if (header)
{
if (tags)
vty_out (vty, v4_header_tag, VTY_NEWLINE);
else
{
vty_out (vty, "BGP table version is 0, local router ID is %s%s",
inet_ntoa (bgp->router_id), VTY_NEWLINE);
vty_out (vty, "Status codes: s suppressed, d damped, h history, * valid, > best, i - internal%s",
VTY_NEWLINE);
vty_out (vty, "Origin codes: i - IGP, e - EGP, ? - incomplete%s%s",
VTY_NEWLINE, VTY_NEWLINE);
vty_out (vty, v4_header, VTY_NEWLINE);
}
header = 0;
}
if (rd_header)
{
u_int16_t type;
struct rd_as rd_as;
struct rd_ip rd_ip;
u_char *pnt;
pnt = rn->p.u.val;
/* Decode RD type. */
type = decode_rd_type (pnt);
/* Decode RD value. */
if (type == RD_TYPE_AS)
decode_rd_as (pnt + 2, &rd_as);
else if (type == RD_TYPE_IP)
decode_rd_ip (pnt + 2, &rd_ip);
vty_out (vty, "Route Distinguisher: ");
if (type == RD_TYPE_AS)
vty_out (vty, "%u:%d", rd_as.as, rd_as.val);
else if (type == RD_TYPE_IP)
vty_out (vty, "%s:%d", inet_ntoa (rd_ip.ip), rd_ip.val);
vty_out (vty, "%s", VTY_NEWLINE);
rd_header = 0;
}
if (tags)
route_vty_out_tag (vty, &rm->p, ri, 0, SAFI_MPLS_VPN);
else
route_vty_out (vty, &rm->p, ri, 0, SAFI_MPLS_VPN);
}
}
}
return CMD_SUCCESS;
}
DEFUN (show_ip_bgp_vpnv4_all,
show_ip_bgp_vpnv4_all_cmd,
"show ip bgp vpnv4 all",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information about all VPNv4 NLRIs\n")
{
return bgp_show_mpls_vpn (vty, NULL, bgp_show_type_normal, NULL, 0);
}
DEFUN (show_ip_bgp_vpnv4_rd,
show_ip_bgp_vpnv4_rd_cmd,
"show ip bgp vpnv4 rd ASN:nn_or_IP-address:nn",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information for a route distinguisher\n"
"VPN Route Distinguisher\n")
{
int ret;
struct prefix_rd prd;
ret = str2prefix_rd (argv[0], &prd);
if (! ret)
{
vty_out (vty, "%% Malformed Route Distinguisher%s", VTY_NEWLINE);
return CMD_WARNING;
}
return bgp_show_mpls_vpn (vty, &prd, bgp_show_type_normal, NULL, 0);
}
DEFUN (show_ip_bgp_vpnv4_all_tags,
show_ip_bgp_vpnv4_all_tags_cmd,
"show ip bgp vpnv4 all tags",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information about all VPNv4 NLRIs\n"
"Display BGP tags for prefixes\n")
{
return bgp_show_mpls_vpn (vty, NULL, bgp_show_type_normal, NULL, 1);
}
DEFUN (show_ip_bgp_vpnv4_rd_tags,
show_ip_bgp_vpnv4_rd_tags_cmd,
"show ip bgp vpnv4 rd ASN:nn_or_IP-address:nn tags",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information for a route distinguisher\n"
"VPN Route Distinguisher\n"
"Display BGP tags for prefixes\n")
{
int ret;
struct prefix_rd prd;
ret = str2prefix_rd (argv[0], &prd);
if (! ret)
{
vty_out (vty, "%% Malformed Route Distinguisher%s", VTY_NEWLINE);
return CMD_WARNING;
}
return bgp_show_mpls_vpn (vty, &prd, bgp_show_type_normal, NULL, 1);
}
DEFUN (show_ip_bgp_vpnv4_all_neighbor_routes,
show_ip_bgp_vpnv4_all_neighbor_routes_cmd,
"show ip bgp vpnv4 all neighbors A.B.C.D routes",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information about all VPNv4 NLRIs\n"
"Detailed information on TCP and BGP neighbor connections\n"
"Neighbor to display information about\n"
"Display routes learned from neighbor\n")
{
union sockunion su;
struct peer *peer;
int ret;
ret = str2sockunion (argv[0], &su);
if (ret < 0)
{
vty_out (vty, "Malformed address: %s%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
peer = peer_lookup (NULL, &su);
if (! peer || ! peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
return CMD_WARNING;
}
return bgp_show_mpls_vpn (vty, NULL, bgp_show_type_neighbor, &su, 0);
}
DEFUN (show_ip_bgp_vpnv4_rd_neighbor_routes,
show_ip_bgp_vpnv4_rd_neighbor_routes_cmd,
"show ip bgp vpnv4 rd ASN:nn_or_IP-address:nn neighbors A.B.C.D routes",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information for a route distinguisher\n"
"VPN Route Distinguisher\n"
"Detailed information on TCP and BGP neighbor connections\n"
"Neighbor to display information about\n"
"Display routes learned from neighbor\n")
{
int ret;
union sockunion su;
struct peer *peer;
struct prefix_rd prd;
ret = str2prefix_rd (argv[0], &prd);
if (! ret)
{
vty_out (vty, "%% Malformed Route Distinguisher%s", VTY_NEWLINE);
return CMD_WARNING;
}
ret = str2sockunion (argv[1], &su);
if (ret < 0)
{
vty_out (vty, "Malformed address: %s%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
peer = peer_lookup (NULL, &su);
if (! peer || ! peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
return CMD_WARNING;
}
return bgp_show_mpls_vpn (vty, &prd, bgp_show_type_neighbor, &su, 0);
}
DEFUN (show_ip_bgp_vpnv4_all_neighbor_advertised_routes,
show_ip_bgp_vpnv4_all_neighbor_advertised_routes_cmd,
"show ip bgp vpnv4 all neighbors A.B.C.D advertised-routes",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information about all VPNv4 NLRIs\n"
"Detailed information on TCP and BGP neighbor connections\n"
"Neighbor to display information about\n"
"Display the routes advertised to a BGP neighbor\n")
{
int ret;
struct peer *peer;
union sockunion su;
ret = str2sockunion (argv[0], &su);
if (ret < 0)
{
vty_out (vty, "%% Malformed address: %s%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
peer = peer_lookup (NULL, &su);
if (! peer || ! peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
return CMD_WARNING;
}
return show_adj_route_vpn (vty, peer, NULL);
}
DEFUN (show_ip_bgp_vpnv4_rd_neighbor_advertised_routes,
show_ip_bgp_vpnv4_rd_neighbor_advertised_routes_cmd,
"show ip bgp vpnv4 rd ASN:nn_or_IP-address:nn neighbors A.B.C.D advertised-routes",
SHOW_STR
IP_STR
BGP_STR
"Display VPNv4 NLRI specific information\n"
"Display information for a route distinguisher\n"
"VPN Route Distinguisher\n"
"Detailed information on TCP and BGP neighbor connections\n"
"Neighbor to display information about\n"
"Display the routes advertised to a BGP neighbor\n")
{
int ret;
struct peer *peer;
struct prefix_rd prd;
union sockunion su;
ret = str2sockunion (argv[1], &su);
if (ret < 0)
{
vty_out (vty, "%% Malformed address: %s%s", argv[0], VTY_NEWLINE);
return CMD_WARNING;
}
peer = peer_lookup (NULL, &su);
if (! peer || ! peer->afc[AFI_IP][SAFI_MPLS_VPN])
{
vty_out (vty, "%% No such neighbor or address family%s", VTY_NEWLINE);
return CMD_WARNING;
}
ret = str2prefix_rd (argv[0], &prd);
if (! ret)
{
vty_out (vty, "%% Malformed Route Distinguisher%s", VTY_NEWLINE);
return CMD_WARNING;
}
return show_adj_route_vpn (vty, peer, &prd);
}
void
bgp_mplsvpn_init (void)
{
install_element (BGP_VPNV4_NODE, &vpnv4_network_cmd);
install_element (BGP_VPNV4_NODE, &no_vpnv4_network_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_all_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_rd_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_all_tags_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_rd_tags_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_all_neighbor_routes_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_rd_neighbor_routes_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_all_neighbor_advertised_routes_cmd);
install_element (VIEW_NODE, &show_ip_bgp_vpnv4_rd_neighbor_advertised_routes_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_all_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_rd_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_all_tags_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_rd_tags_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_all_neighbor_routes_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_rd_neighbor_routes_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_all_neighbor_advertised_routes_cmd);
install_element (ENABLE_NODE, &show_ip_bgp_vpnv4_rd_neighbor_advertised_routes_cmd);
}
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