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bgp_routemap.c
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/* Route map function of bgpd.
* Copyright (C) 1998, 1999 Kunihiro Ishiguro
*
* 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 this program; see the file COPYING; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <zebra.h>
#include "prefix.h"
#include "filter.h"
#include "routemap.h"
#include "command.h"
#include "linklist.h"
#include "plist.h"
#include "memory.h"
#include "log.h"
#include "frrlua.h"
#ifdef HAVE_LIBPCREPOSIX
#include <pcreposix.h>
#else
#include <regex.h>
#endif /* HAVE_LIBPCREPOSIX */
#include "buffer.h"
#include "sockunion.h"
#include "hash.h"
#include "queue.h"
#include "frrstr.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_table.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_aspath.h"
#include "bgpd/bgp_packet.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_zebra.h"
#include "bgpd/bgp_regex.h"
#include "bgpd/bgp_community.h"
#include "bgpd/bgp_clist.h"
#include "bgpd/bgp_filter.h"
#include "bgpd/bgp_mplsvpn.h"
#include "bgpd/bgp_ecommunity.h"
#include "bgpd/bgp_lcommunity.h"
#include "bgpd/bgp_vty.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_evpn.h"
#include "bgpd/bgp_evpn_private.h"
#include "bgpd/bgp_evpn_vty.h"
#include "bgpd/bgp_mplsvpn.h"
#include "bgpd/bgp_pbr.h"
#include "bgpd/bgp_flowspec_util.h"
#include "bgpd/bgp_encap_types.h"
#if ENABLE_BGP_VNC
#include "bgpd/rfapi/bgp_rfapi_cfg.h"
#endif
#ifndef VTYSH_EXTRACT_PL
#include "bgpd/bgp_routemap_clippy.c"
#endif
/* Memo of route-map commands.
o Cisco route-map
match as-path : Done
community : Done
interface : Done
ip address : Done
ip next-hop : Done
ip route-source : Done
ip prefix-list : Done
ipv6 address : Done
ipv6 next-hop : Done
ipv6 route-source: (This will not be implemented by bgpd)
ipv6 prefix-list : Done
length : (This will not be implemented by bgpd)
metric : Done
route-type : (This will not be implemented by bgpd)
tag : Done
local-preference : Done
set as-path prepend : Done
as-path tag : Not yet
automatic-tag : (This will not be implemented by bgpd)
community : Done
large-community : Done
large-comm-list : Done
comm-list : Not yet
dampning : Not yet
default : (This will not be implemented by bgpd)
interface : (This will not be implemented by bgpd)
ip default : (This will not be implemented by bgpd)
ip next-hop : Done
ip precedence : (This will not be implemented by bgpd)
ip tos : (This will not be implemented by bgpd)
level : (This will not be implemented by bgpd)
local-preference : Done
metric : Done
metric-type : Not yet
origin : Done
tag : Done
weight : Done
o Local extensions
set ipv6 next-hop global: Done
set ipv6 next-hop prefer-global: Done
set ipv6 next-hop local : Done
set as-path exclude : Done
*/
/* generic value manipulation to be shared in multiple rules */
#define RMAP_VALUE_SET 0
#define RMAP_VALUE_ADD 1
#define RMAP_VALUE_SUB 2
struct rmap_value {
uint8_t action;
uint8_t variable;
uint32_t value;
};
static int route_value_match(struct rmap_value *rv, uint32_t value)
{
if (rv->variable == 0 && value == rv->value)
return RMAP_MATCH;
return RMAP_NOMATCH;
}
static uint32_t route_value_adjust(struct rmap_value *rv, uint32_t current,
struct peer *peer)
{
uint32_t value;
switch (rv->variable) {
case 1:
value = peer->rtt;
break;
default:
value = rv->value;
break;
}
switch (rv->action) {
case RMAP_VALUE_ADD:
if (current > UINT32_MAX - value)
return UINT32_MAX;
return current + value;
case RMAP_VALUE_SUB:
if (current <= value)
return 0;
return current - value;
default:
return value;
}
}
static void *route_value_compile(const char *arg)
{
uint8_t action = RMAP_VALUE_SET, var = 0;
unsigned long larg = 0;
char *endptr = NULL;
struct rmap_value *rv;
if (arg[0] == '+') {
action = RMAP_VALUE_ADD;
arg++;
} else if (arg[0] == '-') {
action = RMAP_VALUE_SUB;
arg++;
}
if (all_digit(arg)) {
errno = 0;
larg = strtoul(arg, &endptr, 10);
if (*arg == 0 || *endptr != 0 || errno || larg > UINT32_MAX)
return NULL;
} else {
if (strcmp(arg, "rtt") == 0)
var = 1;
else
return NULL;
}
rv = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(struct rmap_value));
rv->action = action;
rv->variable = var;
rv->value = larg;
return rv;
}
static void route_value_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* generic as path object to be shared in multiple rules */
static void *route_aspath_compile(const char *arg)
{
struct aspath *aspath;
aspath = aspath_str2aspath(arg);
if (!aspath)
return NULL;
return aspath;
}
static void route_aspath_free(void *rule)
{
struct aspath *aspath = rule;
aspath_free(aspath);
}
struct bgp_match_peer_compiled {
char *interface;
union sockunion su;
};
/* 'match peer (A.B.C.D|X:X::X:X|WORD)' */
/* Compares the peer specified in the 'match peer' clause with the peer
received in bgp_path_info->peer. If it is the same, or if the peer structure
received is a peer_group containing it, returns RMAP_MATCH. */
static enum route_map_cmd_result_t
route_match_peer(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct bgp_match_peer_compiled *pc;
union sockunion *su;
union sockunion su_def = {
.sin = {.sin_family = AF_INET, .sin_addr.s_addr = INADDR_ANY}};
struct peer_group *group;
struct peer *peer;
struct listnode *node, *nnode;
if (type == RMAP_BGP) {
pc = rule;
su = &pc->su;
peer = ((struct bgp_path_info *)object)->peer;
if (pc->interface) {
if (!peer->conf_if)
return RMAP_NOMATCH;
if (strcmp(peer->conf_if, pc->interface) == 0)
return RMAP_MATCH;
return RMAP_NOMATCH;
}
/* If su='0.0.0.0' (command 'match peer local'), and it's a
NETWORK,
REDISTRIBUTE or DEFAULT_GENERATED route => return RMAP_MATCH
*/
if (sockunion_same(su, &su_def)) {
int ret;
if (CHECK_FLAG(peer->rmap_type, PEER_RMAP_TYPE_NETWORK)
|| CHECK_FLAG(peer->rmap_type,
PEER_RMAP_TYPE_REDISTRIBUTE)
|| CHECK_FLAG(peer->rmap_type,
PEER_RMAP_TYPE_DEFAULT))
ret = RMAP_MATCH;
else
ret = RMAP_NOMATCH;
return ret;
}
if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
if (sockunion_same(su, &peer->su))
return RMAP_MATCH;
return RMAP_NOMATCH;
} else {
group = peer->group;
for (ALL_LIST_ELEMENTS(group->peer, node, nnode,
peer)) {
if (sockunion_same(su, &peer->su))
return RMAP_MATCH;
}
return RMAP_NOMATCH;
}
}
return RMAP_NOMATCH;
}
static void *route_match_peer_compile(const char *arg)
{
struct bgp_match_peer_compiled *pc;
int ret;
pc = XCALLOC(MTYPE_ROUTE_MAP_COMPILED,
sizeof(struct bgp_match_peer_compiled));
ret = str2sockunion(strcmp(arg, "local") ? arg : "0.0.0.0", &pc->su);
if (ret < 0) {
pc->interface = XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
return pc;
}
return pc;
}
/* Free route map's compiled `ip address' value. */
static void route_match_peer_free(void *rule)
{
struct bgp_match_peer_compiled *pc = rule;
XFREE(MTYPE_ROUTE_MAP_COMPILED, pc->interface);
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for ip address matching. */
struct route_map_rule_cmd route_match_peer_cmd = {"peer", route_match_peer,
route_match_peer_compile,
route_match_peer_free};
#if defined(HAVE_LUA)
static enum route_map_cmd_result_t
route_match_command(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
int status = RMAP_NOMATCH;
u_int32_t locpref = 0;
u_int32_t newlocpref = 0;
enum lua_rm_status lrm_status;
struct bgp_path_info *path = (struct bgp_path_info *)object;
lua_State *L = lua_initialize("/etc/frr/lua.scr");
if (L == NULL)
return status;
/*
* Setup the prefix information to pass in
*/
lua_setup_prefix_table(L, prefix);
zlog_debug("Set up prefix table");
/*
* Setup the bgp_path_info information
*/
lua_newtable(L);
lua_pushinteger(L, path->attr->med);
lua_setfield(L, -2, "metric");
lua_pushinteger(L, path->attr->nh_ifindex);
lua_setfield(L, -2, "ifindex");
lua_pushstring(L, path->attr->aspath->str);
lua_setfield(L, -2, "aspath");
lua_pushinteger(L, path->attr->local_pref);
lua_setfield(L, -2, "localpref");
zlog_debug("%s %d", path->attr->aspath->str, path->attr->nh_ifindex);
lua_setglobal(L, "nexthop");
zlog_debug("Set up nexthop information");
/*
* Run the rule
*/
lrm_status = lua_run_rm_rule(L, rule);
switch (lrm_status) {
case LUA_RM_FAILURE:
zlog_debug("RM_FAILURE");
break;
case LUA_RM_NOMATCH:
zlog_debug("RM_NOMATCH");
break;
case LUA_RM_MATCH_AND_CHANGE:
zlog_debug("MATCH AND CHANGE");
lua_getglobal(L, "nexthop");
path->attr->med = get_integer(L, "metric");
/*
* This needs to be abstraced with the set function
*/
if (path->attr->flag & ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF))
locpref = path->attr->local_pref;
newlocpref = get_integer(L, "localpref");
if (newlocpref != locpref) {
path->attr->flag |= ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF);
path->attr->local_pref = newlocpref;
}
status = RMAP_MATCH;
break;
case LUA_RM_MATCH:
zlog_debug("MATCH ONLY");
status = RMAP_MATCH;
break;
}
lua_close(L);
return status;
}
static void *route_match_command_compile(const char *arg)
{
char *command;
command = XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
return command;
}
static void
route_match_command_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
struct route_map_rule_cmd route_match_command_cmd = {
"command",
route_match_command,
route_match_command_compile,
route_match_command_free
};
#endif
/* `match ip address IP_ACCESS_LIST' */
/* Match function should return 1 if match is success else return
zero. */
static enum route_map_cmd_result_t
route_match_ip_address(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct access_list *alist;
if (type == RMAP_BGP && prefix->family == AF_INET) {
alist = access_list_lookup(AFI_IP, (char *)rule);
if (alist == NULL)
return RMAP_NOMATCH;
return (access_list_apply(alist, prefix) == FILTER_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
/* Route map `ip address' match statement. `arg' should be
access-list name. */
static void *route_match_ip_address_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
/* Free route map's compiled `ip address' value. */
static void route_match_ip_address_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for ip address matching. */
struct route_map_rule_cmd route_match_ip_address_cmd = {
"ip address", route_match_ip_address, route_match_ip_address_compile,
route_match_ip_address_free};
/* `match ip next-hop IP_ADDRESS' */
/* Match function return 1 if match is success else return zero. */
static enum route_map_cmd_result_t
route_match_ip_next_hop(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct access_list *alist;
struct bgp_path_info *path;
struct prefix_ipv4 p;
if (type == RMAP_BGP && prefix->family == AF_INET) {
path = object;
p.family = AF_INET;
p.prefix = path->attr->nexthop;
p.prefixlen = IPV4_MAX_BITLEN;
alist = access_list_lookup(AFI_IP, (char *)rule);
if (alist == NULL)
return RMAP_NOMATCH;
return (access_list_apply(alist, &p) == FILTER_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
/* Route map `ip next-hop' match statement. `arg' is
access-list name. */
static void *route_match_ip_next_hop_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
/* Free route map's compiled `ip address' value. */
static void route_match_ip_next_hop_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for ip next-hop matching. */
struct route_map_rule_cmd route_match_ip_next_hop_cmd = {
"ip next-hop", route_match_ip_next_hop, route_match_ip_next_hop_compile,
route_match_ip_next_hop_free};
/* `match ip route-source ACCESS-LIST' */
/* Match function return 1 if match is success else return zero. */
static enum route_map_cmd_result_t
route_match_ip_route_source(void *rule, const struct prefix *pfx,
route_map_object_t type, void *object)
{
struct access_list *alist;
struct bgp_path_info *path;
struct peer *peer;
struct prefix_ipv4 p;
if (type == RMAP_BGP && pfx->family == AF_INET) {
path = object;
peer = path->peer;
if (!peer || sockunion_family(&peer->su) != AF_INET)
return RMAP_NOMATCH;
p.family = AF_INET;
p.prefix = peer->su.sin.sin_addr;
p.prefixlen = IPV4_MAX_BITLEN;
alist = access_list_lookup(AFI_IP, (char *)rule);
if (alist == NULL)
return RMAP_NOMATCH;
return (access_list_apply(alist, &p) == FILTER_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
/* Route map `ip route-source' match statement. `arg' is
access-list name. */
static void *route_match_ip_route_source_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
/* Free route map's compiled `ip address' value. */
static void route_match_ip_route_source_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for ip route-source matching. */
struct route_map_rule_cmd route_match_ip_route_source_cmd = {
"ip route-source", route_match_ip_route_source,
route_match_ip_route_source_compile, route_match_ip_route_source_free};
static enum route_map_cmd_result_t
route_match_prefix_list_flowspec(afi_t afi, struct prefix_list *plist,
const struct prefix *p)
{
int ret;
struct bgp_pbr_entry_main api;
memset(&api, 0, sizeof(api));
/* extract match from flowspec entries */
ret = bgp_flowspec_match_rules_fill(
(uint8_t *)p->u.prefix_flowspec.ptr,
p->u.prefix_flowspec.prefixlen, &api);
if (ret < 0)
return RMAP_NOMATCH;
if (api.match_bitmask & PREFIX_DST_PRESENT ||
api.match_bitmask_iprule & PREFIX_DST_PRESENT) {
if (family2afi((&api.dst_prefix)->family) != afi)
return RMAP_NOMATCH;
return prefix_list_apply(plist, &api.dst_prefix) == PREFIX_DENY
? RMAP_NOMATCH
: RMAP_MATCH;
} else if (api.match_bitmask & PREFIX_SRC_PRESENT ||
api.match_bitmask_iprule & PREFIX_SRC_PRESENT) {
if (family2afi((&api.src_prefix)->family) != afi)
return RMAP_NOMATCH;
return (prefix_list_apply(plist, &api.src_prefix) == PREFIX_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
static enum route_map_cmd_result_t
route_match_address_prefix_list(void *rule, afi_t afi,
const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct prefix_list *plist;
if (type != RMAP_BGP)
return RMAP_NOMATCH;
plist = prefix_list_lookup(afi, (char *)rule);
if (plist == NULL)
return RMAP_NOMATCH;
if (prefix->family == AF_FLOWSPEC)
return route_match_prefix_list_flowspec(afi, plist,
prefix);
return (prefix_list_apply(plist, prefix) == PREFIX_DENY ? RMAP_NOMATCH
: RMAP_MATCH);
}
static enum route_map_cmd_result_t
route_match_ip_address_prefix_list(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
return route_match_address_prefix_list(rule, AFI_IP, prefix, type,
object);
}
static void *route_match_ip_address_prefix_list_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
static void route_match_ip_address_prefix_list_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
struct route_map_rule_cmd route_match_ip_address_prefix_list_cmd = {
"ip address prefix-list", route_match_ip_address_prefix_list,
route_match_ip_address_prefix_list_compile,
route_match_ip_address_prefix_list_free};
/* `match ip next-hop prefix-list PREFIX_LIST' */
static enum route_map_cmd_result_t
route_match_ip_next_hop_prefix_list(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct prefix_list *plist;
struct bgp_path_info *path;
struct prefix_ipv4 p;
if (type == RMAP_BGP && prefix->family == AF_INET) {
path = object;
p.family = AF_INET;
p.prefix = path->attr->nexthop;
p.prefixlen = IPV4_MAX_BITLEN;
plist = prefix_list_lookup(AFI_IP, (char *)rule);
if (plist == NULL)
return RMAP_NOMATCH;
return (prefix_list_apply(plist, &p) == PREFIX_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
static void *route_match_ip_next_hop_prefix_list_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
static void route_match_ip_next_hop_prefix_list_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
struct route_map_rule_cmd route_match_ip_next_hop_prefix_list_cmd = {
"ip next-hop prefix-list", route_match_ip_next_hop_prefix_list,
route_match_ip_next_hop_prefix_list_compile,
route_match_ip_next_hop_prefix_list_free};
/* `match ip next-hop type <blackhole>' */
static enum route_map_cmd_result_t
route_match_ip_next_hop_type(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct bgp_path_info *path;
if (type == RMAP_BGP && prefix->family == AF_INET) {
path = (struct bgp_path_info *)object;
if (!path || !path->attr)
return RMAP_NOMATCH;
/* If nexthop interface's index can't be resolved and nexthop is
set to any address then mark it as type `blackhole`.
This logic works for matching kernel/static routes like:
`ip route add blackhole 10.0.0.1`. */
if (path->attr->nexthop.s_addr == INADDR_ANY
&& !path->attr->nh_ifindex)
return RMAP_MATCH;
}
return RMAP_NOMATCH;
}
static void *route_match_ip_next_hop_type_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
static void route_match_ip_next_hop_type_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
static struct route_map_rule_cmd route_match_ip_next_hop_type_cmd = {
"ip next-hop type", route_match_ip_next_hop_type,
route_match_ip_next_hop_type_compile,
route_match_ip_next_hop_type_free};
/* `match ip route-source prefix-list PREFIX_LIST' */
static enum route_map_cmd_result_t
route_match_ip_route_source_prefix_list(void *rule,
const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct prefix_list *plist;
struct bgp_path_info *path;
struct peer *peer;
struct prefix_ipv4 p;
if (type == RMAP_BGP && prefix->family == AF_INET) {
path = object;
peer = path->peer;
if (!peer || sockunion_family(&peer->su) != AF_INET)
return RMAP_NOMATCH;
p.family = AF_INET;
p.prefix = peer->su.sin.sin_addr;
p.prefixlen = IPV4_MAX_BITLEN;
plist = prefix_list_lookup(AFI_IP, (char *)rule);
if (plist == NULL)
return RMAP_NOMATCH;
return (prefix_list_apply(plist, &p) == PREFIX_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
static void *route_match_ip_route_source_prefix_list_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
static void route_match_ip_route_source_prefix_list_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
struct route_map_rule_cmd route_match_ip_route_source_prefix_list_cmd = {
"ip route-source prefix-list", route_match_ip_route_source_prefix_list,
route_match_ip_route_source_prefix_list_compile,
route_match_ip_route_source_prefix_list_free};
/* `match evpn default-route' */
/* Match function should return 1 if match is success else 0 */
static enum route_map_cmd_result_t
route_match_evpn_default_route(void *rule, const struct prefix *p,
route_map_object_t type, void *object)
{
if (type == RMAP_BGP && is_evpn_prefix_default(p))
return RMAP_MATCH;
return RMAP_NOMATCH;
}
/* Route map commands for default-route matching. */
struct route_map_rule_cmd route_match_evpn_default_route_cmd = {
"evpn default-route", route_match_evpn_default_route, NULL, NULL};
/* `match mac address MAC_ACCESS_LIST' */
/* Match function should return 1 if match is success else return
zero. */
static enum route_map_cmd_result_t
route_match_mac_address(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct access_list *alist;
struct prefix p;
if (type == RMAP_BGP) {
alist = access_list_lookup(AFI_L2VPN, (char *)rule);
if (alist == NULL)
return RMAP_NOMATCH;
if (prefix->u.prefix_evpn.route_type != BGP_EVPN_MAC_IP_ROUTE)
return RMAP_NOMATCH;
p.family = AF_ETHERNET;
p.prefixlen = ETH_ALEN * 8;
p.u.prefix_eth = prefix->u.prefix_evpn.macip_addr.mac;
return (access_list_apply(alist, &p) == FILTER_DENY
? RMAP_NOMATCH
: RMAP_MATCH);
}
return RMAP_NOMATCH;
}
/* Route map `mac address' match statement. `arg' should be
access-list name. */
static void *route_match_mac_address_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
/* Free route map's compiled `ip address' value. */
static void route_match_mac_address_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for mac address matching. */
struct route_map_rule_cmd route_match_mac_address_cmd = {
"mac address", route_match_mac_address, route_match_mac_address_compile,
route_match_mac_address_free};
/*
* Match function returns:
* ...RMAP_MATCH if match is found.
* ...RMAP_NOMATCH if match is not found.
* ...RMAP_NOOP to ignore this match check.
*/
static enum route_map_cmd_result_t
route_match_vni(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
vni_t vni = 0;
unsigned int label_cnt = 0;
struct bgp_path_info *path = NULL;
struct prefix_evpn *evp = (struct prefix_evpn *) prefix;
if (type == RMAP_BGP) {
vni = *((vni_t *)rule);
path = (struct bgp_path_info *)object;
/*
* This rmap filter is valid for vxlan tunnel type only.
* For any other tunnel type, return noop to ignore
* this check.
*/
if (path->attr && path->attr->encap_tunneltype !=
BGP_ENCAP_TYPE_VXLAN)
return RMAP_NOOP;
/*
* Apply filter to type 1, 2, 5 routes only.
* Other route types do not have vni label.
*/
if (evp && (evp->prefix.route_type != BGP_EVPN_AD_ROUTE &&
evp->prefix.route_type != BGP_EVPN_MAC_IP_ROUTE &&
evp->prefix.route_type != BGP_EVPN_IP_PREFIX_ROUTE))
return RMAP_NOOP;
if (path->extra == NULL)
return RMAP_NOMATCH;
for ( ; label_cnt < BGP_MAX_LABELS &&
label_cnt < path->extra->num_labels; label_cnt++) {
if (vni == label2vni(&path->extra->label[label_cnt]))
return RMAP_MATCH;
}
}
return RMAP_NOMATCH;
}
/* Route map `vni' match statement. */
static void *route_match_vni_compile(const char *arg)
{
vni_t *vni = NULL;
char *end = NULL;
vni = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(vni_t));
*vni = strtoul(arg, &end, 10);
if (*end != '\0') {
XFREE(MTYPE_ROUTE_MAP_COMPILED, vni);
return NULL;
}
return vni;
}
/* Free route map's compiled `vni' value. */
static void route_match_vni_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for vni matching. */
struct route_map_rule_cmd route_match_evpn_vni_cmd = {
"evpn vni", route_match_vni, route_match_vni_compile,
route_match_vni_free};
/* `match evpn route-type' */
/* Match function should return 1 if match is success else return
zero. */
static enum route_map_cmd_result_t
route_match_evpn_route_type(void *rule, const struct prefix *pfx,
route_map_object_t type, void *object)
{
uint8_t route_type = 0;
if (type == RMAP_BGP) {
route_type = *((uint8_t *)rule);
if (route_type == pfx->u.prefix_evpn.route_type)
return RMAP_MATCH;
}
return RMAP_NOMATCH;
}
/* Route map `route-type' match statement. */
static void *route_match_evpn_route_type_compile(const char *arg)
{
uint8_t *route_type = NULL;
route_type = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(uint8_t));
if (strncmp(arg, "ma", 2) == 0)
*route_type = BGP_EVPN_MAC_IP_ROUTE;
else if (strncmp(arg, "mu", 2) == 0)
*route_type = BGP_EVPN_IMET_ROUTE;
else
*route_type = BGP_EVPN_IP_PREFIX_ROUTE;
return route_type;
}
/* Free route map's compiled `route-type' value. */
static void route_match_evpn_route_type_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
/* Route map commands for evpn route-type matching. */
struct route_map_rule_cmd route_match_evpn_route_type_cmd = {
"evpn route-type", route_match_evpn_route_type,
route_match_evpn_route_type_compile, route_match_evpn_route_type_free};
/* Route map commands for VRF route leak with source vrf matching */
static enum route_map_cmd_result_t
route_match_vrl_source_vrf(void *rule, const struct prefix *prefix,
route_map_object_t type, void *object)
{
struct bgp_path_info *path;
char *vrf_name;
if (type == RMAP_BGP) {
vrf_name = rule;
path = (struct bgp_path_info *)object;
if (strncmp(vrf_name, "n/a", VRF_NAMSIZ) == 0)
return RMAP_NOMATCH;
if (path->extra == NULL)
return RMAP_NOMATCH;
if (strncmp(vrf_name, vrf_id_to_name(
path->extra->bgp_orig->vrf_id), VRF_NAMSIZ)
== 0)
return RMAP_MATCH;
}
return RMAP_NOMATCH;
}
static void *route_match_vrl_source_vrf_compile(const char *arg)
{
uint8_t *vrf_name = NULL;
vrf_name = XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);