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bgp_routemap.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/* Route map function of bgpd.
* Copyright (C) 1998, 1999 Kunihiro Ishiguro
*/
#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"
#include "frrscript.h"
#ifdef HAVE_LIBPCRE2_POSIX
#ifndef _FRR_PCRE2_POSIX
#define _FRR_PCRE2_POSIX
#include <pcre2posix.h>
#endif /* _FRR_PCRE2_POSIX */
#elif defined(HAVE_LIBPCREPOSIX)
#include <pcreposix.h>
#else
#include <regex.h>
#endif /* HAVE_LIBPCRE2_POSIX */
#include "buffer.h"
#include "sockunion.h"
#include "hash.h"
#include "queue.h"
#include "frrstr.h"
#include "network.h"
#include "lib/northbound_cli.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_community_alias.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"
#include "bgpd/bgp_mpath.h"
#include "bgpd/bgp_script.h"
#ifdef ENABLE_BGP_VNC
#include "bgpd/rfapi/bgp_rfapi_cfg.h"
#endif
#include "bgpd/bgp_routemap_clippy.c"
/* 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
table : 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
#define RMAP_VALUE_TYPE_RTT 1
#define RMAP_VALUE_TYPE_IGP 2
#define RMAP_VALUE_TYPE_AIGP 3
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 bgp_path_info *bpi)
{
uint32_t value;
struct peer *peer = bpi->peer;
switch (rv->variable) {
case RMAP_VALUE_TYPE_RTT:
value = peer->rtt;
break;
case RMAP_VALUE_TYPE_IGP:
value = bpi->extra ? bpi->extra->igpmetric : 0;
break;
case RMAP_VALUE_TYPE_AIGP:
value = MIN(bpi->attr->aigp_metric, UINT32_MAX);
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 (strmatch(arg, "rtt")) {
var = RMAP_VALUE_TYPE_RTT;
} else if (strmatch(arg, "igp")) {
var = RMAP_VALUE_TYPE_IGP;
} else if (strmatch(arg, "aigp")) {
var = RMAP_VALUE_TYPE_AIGP;
} 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, bgp_get_asnotation(NULL));
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, 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;
pc = rule;
su = &pc->su;
peer = ((struct bgp_path_info *)object)->peer;
if (pc->interface) {
if (!peer->conf_if && !peer->group)
return RMAP_NOMATCH;
if (peer->conf_if && strcmp(peer->conf_if, pc->interface) == 0)
return RMAP_MATCH;
if (peer->group &&
strcmp(peer->group->name, 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, AGGREGATE-ADDRESS 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_AGGREGATE)
|| 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->connection->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->connection->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. */
static const struct route_map_rule_cmd route_match_peer_cmd = {
"peer",
route_match_peer,
route_match_peer_compile,
route_match_peer_free
};
static enum route_map_cmd_result_t route_match_src_peer(void *rule, const struct prefix *prefix,
void *object)
{
struct bgp_match_peer_compiled *pc;
union sockunion *su;
struct peer_group *group;
struct peer *peer;
struct listnode *node, *nnode;
struct bgp_path_info *bpi;
pc = rule;
su = &pc->su;
bpi = object;
peer = bpi->from;
/* Fallback to destination (current) peer. This is mostly
* happens if `match src-peer ...` is used at incoming direction.
*/
if (!peer)
peer = bpi->peer;
if (!peer)
return RMAP_NOMATCH;
if (pc->interface) {
if (!peer->conf_if && !peer->group)
return RMAP_NOMATCH;
if (peer->conf_if && strcmp(peer->conf_if, pc->interface) == 0)
return RMAP_MATCH;
if (peer->group && strcmp(peer->group->name, pc->interface) == 0)
return RMAP_MATCH;
return RMAP_NOMATCH;
}
if (!CHECK_FLAG(peer->sflags, PEER_STATUS_GROUP)) {
if (sockunion_same(su, &peer->connection->su))
return RMAP_MATCH;
return RMAP_NOMATCH;
}
group = peer->group;
for (ALL_LIST_ELEMENTS(group->peer, node, nnode, peer)) {
if (sockunion_same(su, &peer->connection->su))
return RMAP_MATCH;
}
return RMAP_NOMATCH;
}
static const struct route_map_rule_cmd route_match_src_peer_cmd = {
"src-peer",
route_match_src_peer,
route_match_peer_compile,
route_match_peer_free
};
#ifdef HAVE_SCRIPTING
enum frrlua_rm_status {
/*
* Script function run failure. This will translate into a deny
*/
LUA_RM_FAILURE = 0,
/*
* No Match was found for the route map function
*/
LUA_RM_NOMATCH,
/*
* Match was found but no changes were made to the incoming data.
*/
LUA_RM_MATCH,
/*
* Match was found and data was modified, so figure out what changed
*/
LUA_RM_MATCH_AND_CHANGE,
};
static enum route_map_cmd_result_t
route_match_script(void *rule, const struct prefix *prefix, void *object)
{
const char *scriptname = rule;
const char *routematch_function = "route_match";
struct bgp_path_info *path = (struct bgp_path_info *)object;
struct frrscript *fs = frrscript_new(scriptname);
if (frrscript_load(fs, routematch_function, NULL)) {
zlog_err(
"Issue loading script or function; defaulting to no match");
return RMAP_NOMATCH;
}
struct attr newattr = *path->attr;
int result = frrscript_call(
fs, routematch_function, ("prefix", prefix),
("attributes", &newattr), ("peer", path->peer),
("RM_FAILURE", LUA_RM_FAILURE), ("RM_NOMATCH", LUA_RM_NOMATCH),
("RM_MATCH", LUA_RM_MATCH),
("RM_MATCH_AND_CHANGE", LUA_RM_MATCH_AND_CHANGE));
if (result) {
zlog_err("Issue running script rule; defaulting to no match");
return RMAP_NOMATCH;
}
int *action = frrscript_get_result(fs, routematch_function, "action", lua_tointegerp);
int status = RMAP_NOMATCH;
switch (*action) {
case LUA_RM_FAILURE:
zlog_err(
"Executing route-map match script '%s' failed; defaulting to no match",
scriptname);
status = RMAP_NOMATCH;
break;
case LUA_RM_NOMATCH:
status = RMAP_NOMATCH;
break;
case LUA_RM_MATCH_AND_CHANGE:
status = RMAP_MATCH;
zlog_debug("Updating attribute based on script's values");
uint32_t locpref = 0;
path->attr->med = newattr.med;
if (CHECK_FLAG(path->attr->flag, ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF)))
locpref = path->attr->local_pref;
if (locpref != newattr.local_pref) {
SET_FLAG(path->attr->flag,
ATTR_FLAG_BIT(BGP_ATTR_LOCAL_PREF));
path->attr->local_pref = newattr.local_pref;
}
break;
case LUA_RM_MATCH:
status = RMAP_MATCH;
break;
}
XFREE(MTYPE_SCRIPT_RES, action);
frrscript_delete(fs);
return status;
}
static void *route_match_script_compile(const char *arg)
{
char *scriptname;
scriptname = XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
return scriptname;
}
static void route_match_script_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
static const struct route_map_rule_cmd route_match_script_cmd = {
"script",
route_match_script,
route_match_script_compile,
route_match_script_free
};
#endif /* HAVE_SCRIPTING */
/* `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, void *object)
{
struct access_list *alist;
if (prefix->family == AF_INET) {
alist = access_list_lookup(AFI_IP, (char *)rule);
if (alist == NULL) {
if (unlikely(CHECK_FLAG(rmap_debug,
DEBUG_ROUTEMAP_DETAIL)))
zlog_debug(
"%s: Access-List Specified: %s does not exist defaulting to NO_MATCH",
__func__, (char *)rule);
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)
{
struct access_list *alist;
alist = access_list_lookup(AFI_IP, arg);
if (!alist)
zlog_warn(
"Access List specified %s does not exist yet, default will be NO_MATCH until it is created",
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. */
static const 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_ACCESS_LIST_NAME>' */
/* 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, void *object)
{
struct access_list *alist;
struct bgp_path_info *path;
struct prefix_ipv4 p;
if (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) {
if (unlikely(CHECK_FLAG(rmap_debug,
DEBUG_ROUTEMAP_DETAIL)))
zlog_debug(
"%s: Access-List Specified: %s does not exist defaulting to NO_MATCH",
__func__, (char *)rule);
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. */
static const 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, void *object)
{
struct access_list *alist;
struct bgp_path_info *path;
struct peer *peer;
struct prefix_ipv4 p;
if (pfx->family == AF_INET) {
path = object;
peer = path->peer;
if (!peer || sockunion_family(&peer->connection->su) != AF_INET)
return RMAP_NOMATCH;
p.family = AF_INET;
p.prefix = peer->connection->su.sin.sin_addr;
p.prefixlen = IPV4_MAX_BITLEN;
alist = access_list_lookup(AFI_IP, (char *)rule);
if (alist == NULL) {
if (unlikely(CHECK_FLAG(rmap_debug,
DEBUG_ROUTEMAP_DETAIL)))
zlog_debug(
"%s: Access-List Specified: %s does not exist defaulting to NO_MATCH",
__func__, (char *)rule);
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. */
static const 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));
if (family2afi(p->u.prefix_flowspec.family) != afi)
return RMAP_NOMATCH;
/* extract match from flowspec entries */
ret = bgp_flowspec_match_rules_fill(
(uint8_t *)p->u.prefix_flowspec.ptr,
p->u.prefix_flowspec.prefixlen, &api,
afi);
if (ret < 0)
return RMAP_NOMATCH;
if (CHECK_FLAG(api.match_bitmask, PREFIX_DST_PRESENT) ||
CHECK_FLAG(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 (CHECK_FLAG(api.match_bitmask, PREFIX_SRC_PRESENT) ||
CHECK_FLAG(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_prefix_list_evpn(afi_t afi, struct prefix_list *plist,
const struct prefix *p)
{
/* Convert to match a general plist */
struct prefix new;
if (evpn_prefix2prefix(p, &new))
return RMAP_NOMATCH;
return (prefix_list_apply(plist, &new) == PREFIX_DENY ? RMAP_NOMATCH
: RMAP_MATCH);
}
static enum route_map_cmd_result_t
route_match_address_prefix_list(void *rule, afi_t afi,
const struct prefix *prefix, void *object)
{
struct prefix_list *plist;
plist = prefix_list_lookup(afi, (char *)rule);
if (plist == NULL) {
if (unlikely(CHECK_FLAG(rmap_debug, DEBUG_ROUTEMAP_DETAIL)))
zlog_debug("%s: Prefix List %s (%s) specified does not exist defaulting to NO_MATCH",
__func__, (char *)rule, afi2str(afi));
return RMAP_NOMATCH;
}
if (prefix->family == AF_FLOWSPEC)
return route_match_prefix_list_flowspec(afi, plist,
prefix);
else if (prefix->family == AF_EVPN)
return route_match_prefix_list_evpn(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,
void *object)
{
return route_match_address_prefix_list(rule, AFI_IP, prefix, 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);
}
static const 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,
void *object)
{
struct prefix_list *plist;
struct bgp_path_info *path;
struct prefix_ipv4 p;
if (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) {
if (unlikely(CHECK_FLAG(rmap_debug,
DEBUG_ROUTEMAP_DETAIL)))
zlog_debug(
"%s: Prefix List %s specified does not exist defaulting to NO_MATCH",
__func__, (char *)rule);
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);
}
static const 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 ipv6 next-hop prefix-list PREFIXLIST_NAME' */
static enum route_map_cmd_result_t
route_match_ipv6_next_hop_prefix_list(void *rule, const struct prefix *prefix,
void *object)
{
struct prefix_list *plist;
struct bgp_path_info *path;
struct prefix_ipv6 p;
if (prefix->family == AF_INET6) {
path = object;
p.family = AF_INET6;
p.prefix = path->attr->mp_nexthop_global;
p.prefixlen = IPV6_MAX_BITLEN;
plist = prefix_list_lookup(AFI_IP6, (char *)rule);
if (!plist) {
if (unlikely(CHECK_FLAG(rmap_debug,
DEBUG_ROUTEMAP_DETAIL)))
zlog_debug(
"%s: Prefix List %s specified does not exist defaulting to NO_MATCH",
__func__, (char *)rule);
return RMAP_NOMATCH;
}
if (prefix_list_apply(plist, &p) == PREFIX_PERMIT)
return RMAP_MATCH;
if (path->attr->mp_nexthop_len
== BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL) {
p.prefix = path->attr->mp_nexthop_local;
if (prefix_list_apply(plist, &p) == PREFIX_PERMIT)
return RMAP_MATCH;
}
}
return RMAP_NOMATCH;
}
static void *route_match_ipv6_next_hop_prefix_list_compile(const char *arg)
{
return XSTRDUP(MTYPE_ROUTE_MAP_COMPILED, arg);
}
static void route_match_ipv6_next_hop_prefix_list_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
static const struct route_map_rule_cmd
route_match_ipv6_next_hop_prefix_list_cmd = {
"ipv6 next-hop prefix-list",
route_match_ipv6_next_hop_prefix_list,
route_match_ipv6_next_hop_prefix_list_compile,
route_match_ipv6_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,
void *object)
{
struct bgp_path_info *path;
if (prefix->family == AF_INET) {
path = (struct bgp_path_info *)object;
if (!path)
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 const 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 source-protocol` */
static enum route_map_cmd_result_t
route_match_source_protocol(void *rule, const struct prefix *prefix,
void *object)
{
struct bgp_path_info *path = object;
int *protocol = rule;
if (!path)
return RMAP_NOMATCH;
if (path->type == *protocol)
return RMAP_MATCH;
return RMAP_NOMATCH;
}
static void *route_match_source_protocol_compile(const char *arg)
{
int *protocol;
protocol = XMALLOC(MTYPE_ROUTE_MAP_COMPILED, sizeof(*protocol));
*protocol = proto_name2num(arg);
return protocol;
}
static void route_match_source_protocol_free(void *rule)
{
XFREE(MTYPE_ROUTE_MAP_COMPILED, rule);
}
static const struct route_map_rule_cmd route_match_source_protocol_cmd = {
"source-protocol",
route_match_source_protocol,
route_match_source_protocol_compile,
route_match_source_protocol_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,
void *object)
{
struct prefix_list *plist;
struct bgp_path_info *path;
struct peer *peer;
struct prefix_ipv4 p;
if (prefix->family == AF_INET) {
path = object;
peer = path->peer;