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bgp_nexthop.c
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// SPDX-License-Identifier: GPL-2.0-or-later
/* BGP nexthop scan
* Copyright (C) 2000 Kunihiro Ishiguro
*/
#include <zebra.h>
#include "command.h"
#include "frrevent.h"
#include "prefix.h"
#include "lib/json.h"
#include "zclient.h"
#include "stream.h"
#include "network.h"
#include "log.h"
#include "memory.h"
#include "hash.h"
#include "jhash.h"
#include "nexthop.h"
#include "queue.h"
#include "filter.h"
#include "printfrr.h"
#include "bgpd/bgpd.h"
#include "bgpd/bgp_route.h"
#include "bgpd/bgp_attr.h"
#include "bgpd/bgp_nexthop.h"
#include "bgpd/bgp_nht.h"
#include "bgpd/bgp_debug.h"
#include "bgpd/bgp_damp.h"
#include "bgpd/bgp_fsm.h"
#include "bgpd/bgp_vty.h"
#include "bgpd/bgp_rd.h"
#include "bgpd/bgp_mplsvpn.h"
DEFINE_MTYPE_STATIC(BGPD, MARTIAN_STRING, "BGP Martian Addr Intf String");
int bgp_nexthop_cache_compare(const struct bgp_nexthop_cache *a,
const struct bgp_nexthop_cache *b)
{
if (a->srte_color < b->srte_color)
return -1;
if (a->srte_color > b->srte_color)
return 1;
if (a->ifindex_ipv6_ll < b->ifindex_ipv6_ll)
return -1;
if (a->ifindex_ipv6_ll > b->ifindex_ipv6_ll)
return 1;
return prefix_cmp(&a->prefix, &b->prefix);
}
void bnc_nexthop_free(struct bgp_nexthop_cache *bnc)
{
nexthops_free(bnc->nexthop);
}
struct bgp_nexthop_cache *bnc_new(struct bgp_nexthop_cache_head *tree,
struct prefix *prefix, uint32_t srte_color,
ifindex_t ifindex)
{
struct bgp_nexthop_cache *bnc;
bnc = XCALLOC(MTYPE_BGP_NEXTHOP_CACHE,
sizeof(struct bgp_nexthop_cache));
bnc->prefix = *prefix;
bnc->ifindex_ipv6_ll = ifindex;
bnc->srte_color = srte_color;
bnc->tree = tree;
LIST_INIT(&(bnc->paths));
bgp_nexthop_cache_add(tree, bnc);
return bnc;
}
bool bnc_existing_for_prefix(struct bgp_nexthop_cache *bnc)
{
struct bgp_nexthop_cache *bnc_tmp;
frr_each (bgp_nexthop_cache, bnc->tree, bnc_tmp) {
if (bnc_tmp == bnc)
continue;
if (prefix_cmp(&bnc->prefix, &bnc_tmp->prefix) == 0)
return true;
}
return false;
}
void bnc_free(struct bgp_nexthop_cache *bnc)
{
bnc_nexthop_free(bnc);
bgp_nexthop_cache_del(bnc->tree, bnc);
XFREE(MTYPE_BGP_NEXTHOP_CACHE, bnc);
}
struct bgp_nexthop_cache *bnc_find(struct bgp_nexthop_cache_head *tree,
struct prefix *prefix, uint32_t srte_color,
ifindex_t ifindex)
{
struct bgp_nexthop_cache bnc = {};
if (!tree)
return NULL;
bnc.prefix = *prefix;
bnc.srte_color = srte_color;
bnc.ifindex_ipv6_ll = ifindex;
return bgp_nexthop_cache_find(tree, &bnc);
}
/* Reset and free all BGP nexthop cache. */
static void bgp_nexthop_cache_reset(struct bgp_nexthop_cache_head *tree)
{
struct bgp_nexthop_cache *bnc;
while (bgp_nexthop_cache_count(tree) > 0) {
bnc = bgp_nexthop_cache_first(tree);
while (!LIST_EMPTY(&(bnc->paths))) {
struct bgp_path_info *path = LIST_FIRST(&(bnc->paths));
bgp_mplsvpn_path_nh_label_unlink(path);
bgp_mplsvpn_path_nh_label_bind_unlink(path);
path_nh_map(path, bnc, false);
}
bnc_free(bnc);
}
}
static void *bgp_tip_hash_alloc(void *p)
{
const struct in_addr *val = (const struct in_addr *)p;
struct tip_addr *addr;
addr = XMALLOC(MTYPE_TIP_ADDR, sizeof(struct tip_addr));
addr->refcnt = 0;
addr->addr.s_addr = val->s_addr;
return addr;
}
static void bgp_tip_hash_free(void *addr)
{
XFREE(MTYPE_TIP_ADDR, addr);
}
static unsigned int bgp_tip_hash_key_make(const void *p)
{
const struct tip_addr *addr = p;
return jhash_1word(addr->addr.s_addr, 0);
}
static bool bgp_tip_hash_cmp(const void *p1, const void *p2)
{
const struct tip_addr *addr1 = p1;
const struct tip_addr *addr2 = p2;
return addr1->addr.s_addr == addr2->addr.s_addr;
}
void bgp_tip_hash_init(struct bgp *bgp)
{
bgp->tip_hash = hash_create(bgp_tip_hash_key_make, bgp_tip_hash_cmp,
"BGP TIP hash");
}
void bgp_tip_hash_destroy(struct bgp *bgp)
{
hash_clean_and_free(&bgp->tip_hash, bgp_tip_hash_free);
}
/* Add/Update Tunnel-IP entry of bgp martian next-hop table.
*
* Returns true only if we add a _new_ TIP so the caller knows that an
* actionable change has occurred. If we find an existing TIP then we
* only need to update the refcnt, since the collection of known TIPs
* has not changed.
*/
bool bgp_tip_add(struct bgp *bgp, struct in_addr *tip)
{
struct tip_addr tmp;
struct tip_addr *addr;
bool tip_added = false;
tmp.addr = *tip;
addr = hash_lookup(bgp->tip_hash, &tmp);
if (!addr) {
addr = hash_get(bgp->tip_hash, &tmp, bgp_tip_hash_alloc);
tip_added = true;
}
addr->refcnt++;
return tip_added;
}
void bgp_tip_del(struct bgp *bgp, struct in_addr *tip)
{
struct tip_addr tmp;
struct tip_addr *addr;
tmp.addr = *tip;
addr = hash_lookup(bgp->tip_hash, &tmp);
/* may have been deleted earlier by bgp_interface_down() */
if (addr == NULL)
return;
addr->refcnt--;
if (addr->refcnt == 0) {
hash_release(bgp->tip_hash, addr);
XFREE(MTYPE_TIP_ADDR, addr);
}
}
/* BGP own address structure */
struct bgp_addr {
struct prefix p;
struct list *ifp_name_list;
};
static void show_address_entry(struct hash_bucket *bucket, void *args)
{
struct vty *vty = (struct vty *)args;
struct bgp_addr *addr = (struct bgp_addr *)bucket->data;
char *name;
struct listnode *node;
char str[INET6_ADDRSTRLEN] = {0};
vty_out(vty, "addr: %s, count: %d : ",
inet_ntop(addr->p.family, &(addr->p.u.prefix),
str, INET6_ADDRSTRLEN),
addr->ifp_name_list->count);
for (ALL_LIST_ELEMENTS_RO(addr->ifp_name_list, node, name)) {
vty_out(vty, " %s,", name);
}
vty_out(vty, "\n");
}
void bgp_nexthop_show_address_hash(struct vty *vty, struct bgp *bgp)
{
hash_iterate(bgp->address_hash,
(void (*)(struct hash_bucket *, void *))show_address_entry,
vty);
}
static void bgp_address_hash_string_del(void *val)
{
char *data = val;
XFREE(MTYPE_MARTIAN_STRING, data);
}
static void *bgp_address_hash_alloc(void *p)
{
struct bgp_addr *copy_addr = p;
struct bgp_addr *addr = NULL;
addr = XMALLOC(MTYPE_BGP_ADDR, sizeof(struct bgp_addr));
prefix_copy(&addr->p, ©_addr->p);
addr->ifp_name_list = list_new();
addr->ifp_name_list->del = bgp_address_hash_string_del;
return addr;
}
static void bgp_address_hash_free(void *data)
{
struct bgp_addr *addr = data;
list_delete(&addr->ifp_name_list);
XFREE(MTYPE_BGP_ADDR, addr);
}
static unsigned int bgp_address_hash_key_make(const void *p)
{
const struct bgp_addr *addr = p;
return prefix_hash_key(&addr->p);
}
static bool bgp_address_hash_cmp(const void *p1, const void *p2)
{
const struct bgp_addr *addr1 = p1;
const struct bgp_addr *addr2 = p2;
return prefix_same(&addr1->p, &addr2->p);
}
void bgp_address_init(struct bgp *bgp)
{
bgp->address_hash =
hash_create(bgp_address_hash_key_make, bgp_address_hash_cmp,
"BGP Connected Address Hash");
}
void bgp_address_destroy(struct bgp *bgp)
{
hash_clean_and_free(&bgp->address_hash, bgp_address_hash_free);
}
static void bgp_address_add(struct bgp *bgp, struct connected *ifc,
struct prefix *p)
{
struct bgp_addr tmp;
struct bgp_addr *addr;
struct listnode *node;
char *name;
tmp.p = *p;
if (tmp.p.family == AF_INET)
tmp.p.prefixlen = IPV4_MAX_BITLEN;
else if (tmp.p.family == AF_INET6)
tmp.p.prefixlen = IPV6_MAX_BITLEN;
addr = hash_get(bgp->address_hash, &tmp, bgp_address_hash_alloc);
for (ALL_LIST_ELEMENTS_RO(addr->ifp_name_list, node, name)) {
if (strcmp(ifc->ifp->name, name) == 0)
break;
}
if (!node) {
name = XSTRDUP(MTYPE_MARTIAN_STRING, ifc->ifp->name);
listnode_add(addr->ifp_name_list, name);
}
}
static void bgp_address_del(struct bgp *bgp, struct connected *ifc,
struct prefix *p)
{
struct bgp_addr tmp;
struct bgp_addr *addr;
struct listnode *node;
char *name;
tmp.p = *p;
if (tmp.p.family == AF_INET)
tmp.p.prefixlen = IPV4_MAX_BITLEN;
else if (tmp.p.family == AF_INET6)
tmp.p.prefixlen = IPV6_MAX_BITLEN;
addr = hash_lookup(bgp->address_hash, &tmp);
/* may have been deleted earlier by bgp_interface_down() */
if (addr == NULL)
return;
for (ALL_LIST_ELEMENTS_RO(addr->ifp_name_list, node, name)) {
if (strcmp(ifc->ifp->name, name) == 0)
break;
}
if (node) {
list_delete_node(addr->ifp_name_list, node);
XFREE(MTYPE_MARTIAN_STRING, name);
}
if (addr->ifp_name_list->count == 0) {
hash_release(bgp->address_hash, addr);
list_delete(&addr->ifp_name_list);
XFREE(MTYPE_BGP_ADDR, addr);
}
}
struct bgp_connected_ref {
unsigned int refcnt;
};
void bgp_connected_add(struct bgp *bgp, struct connected *ifc)
{
struct prefix p;
struct prefix *addr;
struct bgp_dest *dest;
struct bgp_connected_ref *bc;
struct listnode *node, *nnode;
struct peer *peer;
struct peer_connection *connection;
addr = ifc->address;
p = *(CONNECTED_PREFIX(ifc));
if (addr->family == AF_INET) {
apply_mask_ipv4((struct prefix_ipv4 *)&p);
if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
return;
bgp_address_add(bgp, ifc, addr);
dest = bgp_node_get(bgp->connected_table[AFI_IP], &p);
bc = bgp_dest_get_bgp_connected_ref_info(dest);
if (bc)
bc->refcnt++;
else {
bc = XCALLOC(MTYPE_BGP_CONN,
sizeof(struct bgp_connected_ref));
bc->refcnt = 1;
bgp_dest_set_bgp_connected_ref_info(dest, bc);
}
for (ALL_LIST_ELEMENTS(bgp->peer, node, nnode, peer)) {
if (peer->conf_if &&
(strcmp(peer->conf_if, ifc->ifp->name) == 0) &&
!peer_established(peer->connection) &&
!CHECK_FLAG(peer->flags, PEER_FLAG_IFPEER_V6ONLY)) {
connection = peer->connection;
if (peer_active(peer))
BGP_EVENT_ADD(connection, BGP_Stop);
BGP_EVENT_ADD(connection, BGP_Start);
}
}
} else if (addr->family == AF_INET6) {
apply_mask_ipv6((struct prefix_ipv6 *)&p);
if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
return;
if (IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6))
return;
bgp_address_add(bgp, ifc, addr);
dest = bgp_node_get(bgp->connected_table[AFI_IP6], &p);
bc = bgp_dest_get_bgp_connected_ref_info(dest);
if (bc)
bc->refcnt++;
else {
bc = XCALLOC(MTYPE_BGP_CONN,
sizeof(struct bgp_connected_ref));
bc->refcnt = 1;
bgp_dest_set_bgp_connected_ref_info(dest, bc);
}
}
}
void bgp_connected_delete(struct bgp *bgp, struct connected *ifc)
{
struct prefix p;
struct prefix *addr;
struct bgp_dest *dest = NULL;
struct bgp_connected_ref *bc;
addr = ifc->address;
p = *(CONNECTED_PREFIX(ifc));
apply_mask(&p);
if (addr->family == AF_INET) {
if (prefix_ipv4_any((struct prefix_ipv4 *)&p))
return;
bgp_address_del(bgp, ifc, addr);
dest = bgp_node_lookup(bgp->connected_table[AFI_IP], &p);
} else if (addr->family == AF_INET6) {
if (IN6_IS_ADDR_UNSPECIFIED(&p.u.prefix6))
return;
if (IN6_IS_ADDR_LINKLOCAL(&p.u.prefix6))
return;
bgp_address_del(bgp, ifc, addr);
dest = bgp_node_lookup(bgp->connected_table[AFI_IP6], &p);
}
if (!dest)
return;
bc = bgp_dest_get_bgp_connected_ref_info(dest);
bc->refcnt--;
if (bc->refcnt == 0) {
XFREE(MTYPE_BGP_CONN, bc);
bgp_dest_set_bgp_connected_ref_info(dest, NULL);
}
dest = bgp_dest_unlock_node(dest);
assert(dest);
bgp_dest_unlock_node(dest);
}
static void bgp_connected_cleanup(struct route_table *table,
struct route_node *rn)
{
struct bgp_connected_ref *bc;
struct bgp_dest *bn = bgp_dest_from_rnode(rn);
bc = bgp_dest_get_bgp_connected_ref_info(bn);
if (!bc)
return;
XFREE(MTYPE_BGP_CONN, bc);
bgp_dest_set_bgp_connected_ref_info(bn, NULL);
}
bool bgp_nexthop_self(struct bgp *bgp, afi_t afi, uint8_t type,
uint8_t sub_type, struct attr *attr,
struct bgp_dest *dest)
{
uint8_t new_afi = afi == AFI_IP ? AF_INET : AF_INET6;
struct bgp_addr tmp_addr = {{0}}, *addr = NULL;
struct tip_addr tmp_tip, *tip = NULL;
const struct prefix *p = bgp_dest_get_prefix(dest);
bool is_bgp_static_route =
((type == ZEBRA_ROUTE_BGP) && (sub_type == BGP_ROUTE_STATIC))
? true
: false;
if (!is_bgp_static_route)
new_afi = BGP_ATTR_NEXTHOP_AFI_IP6(attr) ? AF_INET6 : AF_INET;
tmp_addr.p.family = new_afi;
switch (new_afi) {
case AF_INET:
if (is_bgp_static_route) {
tmp_addr.p.u.prefix4 = p->u.prefix4;
tmp_addr.p.prefixlen = p->prefixlen;
} else {
/* Here we need to find out which nexthop to be used*/
if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP)) {
tmp_addr.p.u.prefix4 = attr->nexthop;
tmp_addr.p.prefixlen = IPV4_MAX_BITLEN;
} else if ((attr->mp_nexthop_len)
&& ((attr->mp_nexthop_len
== BGP_ATTR_NHLEN_IPV4)
|| (attr->mp_nexthop_len
== BGP_ATTR_NHLEN_VPNV4))) {
tmp_addr.p.u.prefix4 =
attr->mp_nexthop_global_in;
tmp_addr.p.prefixlen = IPV4_MAX_BITLEN;
} else
return false;
}
break;
case AF_INET6:
if (is_bgp_static_route) {
tmp_addr.p.u.prefix6 = p->u.prefix6;
tmp_addr.p.prefixlen = p->prefixlen;
} else {
tmp_addr.p.u.prefix6 = attr->mp_nexthop_global;
tmp_addr.p.prefixlen = IPV6_MAX_BITLEN;
}
break;
default:
break;
}
addr = hash_lookup(bgp->address_hash, &tmp_addr);
if (addr)
return true;
if (new_afi == AF_INET && hashcount(bgp->tip_hash)) {
memset(&tmp_tip, 0, sizeof(tmp_tip));
tmp_tip.addr = attr->nexthop;
if (attr->flag & ATTR_FLAG_BIT(BGP_ATTR_NEXT_HOP)) {
tmp_tip.addr = attr->nexthop;
} else if ((attr->mp_nexthop_len) &&
((attr->mp_nexthop_len == BGP_ATTR_NHLEN_IPV4)
|| (attr->mp_nexthop_len == BGP_ATTR_NHLEN_VPNV4))) {
tmp_tip.addr = attr->mp_nexthop_global_in;
}
tip = hash_lookup(bgp->tip_hash, &tmp_tip);
if (tip)
return true;
}
return false;
}
bool bgp_multiaccess_check_v4(struct in_addr nexthop, struct peer *peer)
{
struct bgp_dest *dest1;
struct bgp_dest *dest2;
struct prefix p;
int ret;
p.family = AF_INET;
p.prefixlen = IPV4_MAX_BITLEN;
p.u.prefix4 = nexthop;
dest1 = bgp_node_match(peer->bgp->connected_table[AFI_IP], &p);
if (!dest1)
return false;
p.family = AF_INET;
p.prefixlen = IPV4_MAX_BITLEN;
p.u.prefix4 = peer->connection->su.sin.sin_addr;
dest2 = bgp_node_match(peer->bgp->connected_table[AFI_IP], &p);
if (!dest2) {
bgp_dest_unlock_node(dest1);
return false;
}
ret = (dest1 == dest2);
bgp_dest_unlock_node(dest1);
bgp_dest_unlock_node(dest2);
return ret;
}
bool bgp_multiaccess_check_v6(struct in6_addr nexthop, struct peer *peer)
{
struct bgp_dest *dest1;
struct bgp_dest *dest2;
struct prefix p;
int ret;
p.family = AF_INET6;
p.prefixlen = IPV6_MAX_BITLEN;
p.u.prefix6 = nexthop;
dest1 = bgp_node_match(peer->bgp->connected_table[AFI_IP6], &p);
if (!dest1)
return false;
p.family = AF_INET6;
p.prefixlen = IPV6_MAX_BITLEN;
p.u.prefix6 = peer->connection->su.sin6.sin6_addr;
dest2 = bgp_node_match(peer->bgp->connected_table[AFI_IP6], &p);
if (!dest2) {
bgp_dest_unlock_node(dest1);
return false;
}
ret = (dest1 == dest2);
bgp_dest_unlock_node(dest1);
bgp_dest_unlock_node(dest2);
return ret;
}
bool bgp_subgrp_multiaccess_check_v6(struct in6_addr nexthop,
struct update_subgroup *subgrp,
struct peer *exclude)
{
struct bgp_dest *dest1 = NULL, *dest2 = NULL;
struct peer_af *paf = NULL;
struct prefix p = {0}, np = {0};
struct bgp *bgp = NULL;
np.family = AF_INET6;
np.prefixlen = IPV6_MAX_BITLEN;
np.u.prefix6 = nexthop;
p.family = AF_INET;
p.prefixlen = IPV6_MAX_BITLEN;
bgp = SUBGRP_INST(subgrp);
dest1 = bgp_node_match(bgp->connected_table[AFI_IP6], &np);
if (!dest1)
return false;
SUBGRP_FOREACH_PEER (subgrp, paf) {
/* Skip peer we're told to exclude - e.g., source of route. */
if (paf->peer == exclude)
continue;
p.u.prefix6 = paf->peer->connection->su.sin6.sin6_addr;
dest2 = bgp_node_match(bgp->connected_table[AFI_IP6], &p);
if (dest1 == dest2) {
bgp_dest_unlock_node(dest1);
bgp_dest_unlock_node(dest2);
return true;
}
if (dest2)
bgp_dest_unlock_node(dest2);
}
bgp_dest_unlock_node(dest1);
return false;
}
bool bgp_subgrp_multiaccess_check_v4(struct in_addr nexthop,
struct update_subgroup *subgrp,
struct peer *exclude)
{
struct bgp_dest *dest1, *dest2;
struct peer_af *paf;
struct prefix p, np;
struct bgp *bgp;
np.family = AF_INET;
np.prefixlen = IPV4_MAX_BITLEN;
np.u.prefix4 = nexthop;
p.family = AF_INET;
p.prefixlen = IPV4_MAX_BITLEN;
bgp = SUBGRP_INST(subgrp);
dest1 = bgp_node_match(bgp->connected_table[AFI_IP], &np);
if (!dest1)
return false;
SUBGRP_FOREACH_PEER (subgrp, paf) {
/* Skip peer we're told to exclude - e.g., source of route. */
if (paf->peer == exclude)
continue;
p.u.prefix4 = paf->peer->connection->su.sin.sin_addr;
dest2 = bgp_node_match(bgp->connected_table[AFI_IP], &p);
if (dest1 == dest2) {
bgp_dest_unlock_node(dest1);
bgp_dest_unlock_node(dest2);
return true;
}
if (dest2)
bgp_dest_unlock_node(dest2);
}
bgp_dest_unlock_node(dest1);
return false;
}
static void bgp_show_bgp_path_info_flags(uint32_t flags, json_object *json)
{
json_object *json_flags = NULL;
if (!json)
return;
json_flags = json_object_new_object();
json_object_boolean_add(json_flags, "igpChanged",
CHECK_FLAG(flags, BGP_PATH_IGP_CHANGED));
json_object_boolean_add(json_flags, "damped",
CHECK_FLAG(flags, BGP_PATH_DAMPED));
json_object_boolean_add(json_flags, "history",
CHECK_FLAG(flags, BGP_PATH_HISTORY));
json_object_boolean_add(json_flags, "bestpath",
CHECK_FLAG(flags, BGP_PATH_SELECTED));
json_object_boolean_add(json_flags, "valid",
CHECK_FLAG(flags, BGP_PATH_VALID));
json_object_boolean_add(json_flags, "attrChanged",
CHECK_FLAG(flags, BGP_PATH_ATTR_CHANGED));
json_object_boolean_add(json_flags, "deterministicMedCheck",
CHECK_FLAG(flags, BGP_PATH_DMED_CHECK));
json_object_boolean_add(json_flags, "deterministicMedSelected",
CHECK_FLAG(flags, BGP_PATH_DMED_SELECTED));
json_object_boolean_add(json_flags, "stale",
CHECK_FLAG(flags, BGP_PATH_STALE));
json_object_boolean_add(json_flags, "removed",
CHECK_FLAG(flags, BGP_PATH_REMOVED));
json_object_boolean_add(json_flags, "counted",
CHECK_FLAG(flags, BGP_PATH_COUNTED));
json_object_boolean_add(json_flags, "multipath",
CHECK_FLAG(flags, BGP_PATH_MULTIPATH));
json_object_boolean_add(json_flags, "multipathChanged",
CHECK_FLAG(flags, BGP_PATH_MULTIPATH_CHG));
json_object_boolean_add(json_flags, "ribAttributeChanged",
CHECK_FLAG(flags, BGP_PATH_RIB_ATTR_CHG));
json_object_boolean_add(json_flags, "nexthopSelf",
CHECK_FLAG(flags, BGP_PATH_ANNC_NH_SELF));
json_object_boolean_add(json_flags, "linkBandwidthChanged",
CHECK_FLAG(flags, BGP_PATH_LINK_BW_CHG));
json_object_boolean_add(json_flags, "acceptOwn",
CHECK_FLAG(flags, BGP_PATH_ACCEPT_OWN));
json_object_object_add(json, "flags", json_flags);
}
static void bgp_show_nexthop_paths(struct vty *vty, struct bgp *bgp,
struct bgp_nexthop_cache *bnc,
json_object *json)
{
struct bgp_dest *dest;
struct bgp_path_info *path;
afi_t afi;
safi_t safi;
struct bgp_table *table;
struct bgp *bgp_path;
json_object *paths = NULL;
json_object *json_path = NULL;
if (json)
paths = json_object_new_array();
else
vty_out(vty, " Paths:\n");
LIST_FOREACH (path, &(bnc->paths), nh_thread) {
dest = path->net;
assert(dest && bgp_dest_table(dest));
afi = family2afi(bgp_dest_get_prefix(dest)->family);
table = bgp_dest_table(dest);
safi = table->safi;
bgp_path = table->bgp;
if (json) {
json_path = json_object_new_object();
json_object_string_add(json_path, "afi", afi2str(afi));
json_object_string_add(json_path, "safi",
safi2str(safi));
json_object_string_addf(json_path, "prefix", "%pBD",
dest);
if (dest->pdest)
json_object_string_addf(
json_path, "rd",
BGP_RD_AS_FORMAT(bgp->asnotation),
(struct prefix_rd *)bgp_dest_get_prefix(
dest->pdest));
json_object_string_add(
json_path, "vrf",
vrf_id_to_name(bgp_path->vrf_id));
bgp_show_bgp_path_info_flags(path->flags, json_path);
json_object_array_add(paths, json_path);
continue;
}
if (dest->pdest) {
vty_out(vty, " %d/%d %pBD RD ", afi, safi, dest);
vty_out(vty, BGP_RD_AS_FORMAT(bgp->asnotation),
(struct prefix_rd *)bgp_dest_get_prefix(
dest->pdest));
vty_out(vty, " %s flags 0x%x\n", bgp_path->name_pretty,
path->flags);
} else
vty_out(vty, " %d/%d %pBD %s flags 0x%x\n",
afi, safi, dest, bgp_path->name_pretty, path->flags);
}
if (json)
json_object_object_add(json, "paths", paths);
}
static void bgp_show_nexthops_detail(struct vty *vty, struct bgp *bgp,
struct bgp_nexthop_cache *bnc,
json_object *json)
{
struct nexthop *nexthop;
json_object *json_gates = NULL;
json_object *json_gate = NULL;
if (json)
json_gates = json_object_new_array();
for (nexthop = bnc->nexthop; nexthop; nexthop = nexthop->next) {
if (json) {
json_gate = json_object_new_object();
switch (nexthop->type) {
case NEXTHOP_TYPE_IPV6:
json_object_string_addf(json_gate, "ip", "%pI6",
&nexthop->gate.ipv6);
break;
case NEXTHOP_TYPE_IPV6_IFINDEX:
json_object_string_addf(json_gate, "ip", "%pI6",
&nexthop->gate.ipv6);
json_object_string_add(
json_gate, "interfaceName",
ifindex2ifname(
bnc->ifindex_ipv6_ll
? bnc->ifindex_ipv6_ll
: nexthop->ifindex,
bgp->vrf_id));
break;
case NEXTHOP_TYPE_IPV4:
json_object_string_addf(json_gate, "ip", "%pI4",
&nexthop->gate.ipv4);
break;
case NEXTHOP_TYPE_IFINDEX:
json_object_string_add(
json_gate, "interfaceName",
ifindex2ifname(
bnc->ifindex_ipv6_ll
? bnc->ifindex_ipv6_ll
: nexthop->ifindex,
bgp->vrf_id));
break;
case NEXTHOP_TYPE_IPV4_IFINDEX:
json_object_string_addf(json_gate, "ip", "%pI4",
&nexthop->gate.ipv4);
json_object_string_add(
json_gate, "interfaceName",
ifindex2ifname(
bnc->ifindex_ipv6_ll
? bnc->ifindex_ipv6_ll
: nexthop->ifindex,
bgp->vrf_id));
break;
case NEXTHOP_TYPE_BLACKHOLE:
json_object_boolean_true_add(json_gate,
"unreachable");
switch (nexthop->bh_type) {
case BLACKHOLE_REJECT:
json_object_boolean_true_add(json_gate,
"reject");
break;
case BLACKHOLE_ADMINPROHIB:
json_object_boolean_true_add(
json_gate, "adminProhibited");
break;
case BLACKHOLE_NULL:
json_object_boolean_true_add(
json_gate, "blackhole");
break;
case BLACKHOLE_UNSPEC:
break;
}
break;
default:
break;
}
json_object_array_add(json_gates, json_gate);
continue;
}
switch (nexthop->type) {
case NEXTHOP_TYPE_IPV6:
case NEXTHOP_TYPE_IPV6_IFINDEX:
vty_out(vty, " gate %pI6", &nexthop->gate.ipv6);
if (nexthop->type == NEXTHOP_TYPE_IPV6_IFINDEX &&
bnc->ifindex_ipv6_ll)
vty_out(vty, ", if %s\n",
ifindex2ifname(bnc->ifindex_ipv6_ll,
bgp->vrf_id));
else if (nexthop->ifindex)
vty_out(vty, ", if %s\n",
ifindex2ifname(nexthop->ifindex,
bgp->vrf_id));
else
vty_out(vty, "\n");
break;
case NEXTHOP_TYPE_IPV4:
case NEXTHOP_TYPE_IPV4_IFINDEX:
vty_out(vty, " gate %pI4", &nexthop->gate.ipv4);
if (nexthop->type == NEXTHOP_TYPE_IPV4_IFINDEX &&
bnc->ifindex_ipv6_ll)
vty_out(vty, ", if %s\n",
ifindex2ifname(bnc->ifindex_ipv6_ll,
bgp->vrf_id));
else if (nexthop->ifindex)
vty_out(vty, ", if %s\n",
ifindex2ifname(nexthop->ifindex,
bgp->vrf_id));
else
vty_out(vty, "\n");
break;
case NEXTHOP_TYPE_IFINDEX:
vty_out(vty, " if %s\n",
ifindex2ifname(bnc->ifindex_ipv6_ll
? bnc->ifindex_ipv6_ll
: nexthop->ifindex,
bgp->vrf_id));
break;
case NEXTHOP_TYPE_BLACKHOLE:
vty_out(vty, " blackhole\n");
break;
default:
vty_out(vty, " invalid nexthop type %u\n",
nexthop->type);
}
}
if (json)
json_object_object_add(json, "nexthops", json_gates);
}
static void bgp_show_nexthop(struct vty *vty, struct bgp *bgp,
struct bgp_nexthop_cache *bnc, bool specific,
json_object *json)
{
char buf[PREFIX2STR_BUFFER];
time_t tbuf;
char timebuf[32];
struct peer *peer;
json_object *json_last_update = NULL;
json_object *json_nexthop = NULL;
peer = (struct peer *)bnc->nht_info;
if (json)
json_nexthop = json_object_new_object();
if (bnc->srte_color) {
if (json)
json_object_int_add(json_nexthop, "srteColor",
bnc->srte_color);
else
vty_out(vty, " SR-TE color %u -", bnc->srte_color);
}
inet_ntop(bnc->prefix.family, &bnc->prefix.u.prefix, buf, sizeof(buf));
if (CHECK_FLAG(bnc->flags, BGP_NEXTHOP_VALID)) {
if (json) {
json_object_boolean_true_add(json_nexthop, "valid");
json_object_boolean_true_add(json_nexthop, "complete");
json_object_int_add(json_nexthop, "igpMetric",
bnc->metric);
json_object_int_add(json_nexthop, "pathCount",
bnc->path_count);
if (peer)