Ede_Vau
/
frr
mirror of https://github.com/FRRouting/frr.git
1
1
Fork 0
Code Issues Releases Wiki Activity
frr/ldpd/lde.c

2502 lines
61 KiB
C
Raw Permalink Blame History

// SPDX-License-Identifier: ISC
/* $OpenBSD$ */
/*
* Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org>
* Copyright (c) 2004, 2005 Claudio Jeker <claudio@openbsd.org>
* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*/
#include <zebra.h>
#include "ldp.h"
#include "ldpd.h"
#include "ldpe.h"
#include "log.h"
#include "lde.h"
#include "ldp_debug.h"
#include "rlfa.h"
#include <lib/log.h>
#include "memory.h"
#include "privs.h"
#include "sigevent.h"
#include "mpls.h"
#include <lib/linklist.h>
#include "zclient.h"
#include "stream.h"
#include "network.h"
#include "libfrr.h"
#include "zlog_live.h"
static void lde_shutdown(void);
static void lde_dispatch_imsg(struct event *thread);
static void lde_dispatch_parent(struct event *thread);
static __inline int lde_nbr_compare(const struct lde_nbr *,
const struct lde_nbr *);
static struct lde_nbr *lde_nbr_new(uint32_t, struct lde_nbr *);
static void lde_nbr_del(struct lde_nbr *);
static struct lde_nbr *lde_nbr_find(uint32_t);
static void lde_nbr_clear(void);
static void lde_nbr_addr_update(struct lde_nbr *,
struct lde_addr *, int);
static __inline int lde_map_compare(const struct lde_map *,
const struct lde_map *);
static void lde_map_free(void *);
static int lde_address_add(struct lde_nbr *, struct lde_addr *);
static int lde_address_del(struct lde_nbr *, struct lde_addr *);
static void lde_address_list_free(struct lde_nbr *);
static void zclient_sync_init(void);
static void lde_label_list_init(void);
static int lde_get_label_chunk(void);
static void on_get_label_chunk_response(uint32_t start, uint32_t end);
static uint32_t lde_get_next_label(void);
static bool lde_fec_connected(const struct fec_node *);
static bool lde_fec_outside_mpls_network(const struct fec_node *);
static void lde_check_filter_af(int, struct ldpd_af_conf *,
const char *);
RB_GENERATE(nbr_tree, lde_nbr, entry, lde_nbr_compare)
RB_GENERATE(lde_map_head, lde_map, entry, lde_map_compare)
struct ldpd_conf *ldeconf;
struct nbr_tree lde_nbrs = RB_INITIALIZER(&lde_nbrs);
static struct imsgev *iev_ldpe;
static struct imsgev iev_main_sync_data;
static struct imsgev *iev_main, *iev_main_sync;
/* lde privileges */
static zebra_capabilities_t _caps_p [] =
{
ZCAP_NET_ADMIN
};
static struct zebra_privs_t lde_privs =
{
#if defined(VTY_GROUP)
.vty_group = VTY_GROUP,
#endif
.caps_p = _caps_p,
.cap_num_p = array_size(_caps_p),
.cap_num_i = 0
};
/* List of chunks of labels externally assigned by Zebra */
static struct list *label_chunk_list;
static struct listnode *current_label_chunk;
/* Synchronous zclient to request labels */
struct zclient *zclient_sync;
/* SIGINT / SIGTERM handler. */
static void
sigint(void)
{
lde_shutdown();
}
static struct frr_signal_t lde_signals[] =
{
{
.signal = SIGHUP,
/* ignore */
},
{
.signal = SIGINT,
.handler = &sigint,
},
{
.signal = SIGTERM,
.handler = &sigint,
},
};
/* label decision engine */
void
lde(void)
{
static struct zlog_live_cfg child_log;
#ifdef HAVE_SETPROCTITLE
setproctitle("label decision engine");
#endif
ldpd_process = PROC_LDE_ENGINE;
log_procname = log_procnames[PROC_LDE_ENGINE];
master = frr_init();
zlog_live_open_fd(&child_log, LOG_DEBUG, LDPD_FD_LOG);
/* no frr_config_fork() here, allow frr_pthread to create threads */
frr_is_after_fork = true;
/* setup signal handler */
signal_init(master, array_size(lde_signals), lde_signals);
/* setup pipes and event handlers to the parent process */
if ((iev_main = calloc(1, sizeof(struct imsgev))) == NULL)
fatal(NULL);
imsg_init(&iev_main->ibuf, LDPD_FD_ASYNC);
iev_main->handler_read = lde_dispatch_parent;
event_add_read(master, iev_main->handler_read, iev_main,
iev_main->ibuf.fd, &iev_main->ev_read);
iev_main->handler_write = ldp_write_handler;
memset(&iev_main_sync_data, 0, sizeof(iev_main_sync_data));
iev_main_sync = &iev_main_sync_data;
imsg_init(&iev_main_sync->ibuf, LDPD_FD_SYNC);
/* create base configuration */
ldeconf = config_new_empty();
struct event thread;
while (event_fetch(master, &thread))
event_call(&thread);
/* NOTREACHED */
return;
}
void
lde_init(struct ldpd_init *init)
{
/* drop privileges */
lde_privs.user = init->user;
lde_privs.group = init->group;
zprivs_preinit(&lde_privs);
zprivs_init(&lde_privs);
/* start the LIB garbage collector */
lde_gc_start_timer();
/* Init synchronous zclient and label list */
frr_zclient_addr(&zclient_addr, &zclient_addr_len,
init->zclient_serv_path);
zclient_sync_init();
}
static void
lde_shutdown(void)
{
/* close pipes */
if (iev_ldpe) {
msgbuf_clear(&iev_ldpe->ibuf.w);
close(iev_ldpe->ibuf.fd);
iev_ldpe->ibuf.fd = -1;
}
msgbuf_clear(&iev_main->ibuf.w);
close(iev_main->ibuf.fd);
iev_main->ibuf.fd = -1;
msgbuf_clear(&iev_main_sync->ibuf.w);
close(iev_main_sync->ibuf.fd);
iev_main_sync->ibuf.fd = -1;
lde_gc_stop_timer();
lde_nbr_clear();
fec_tree_clear();
config_clear(ldeconf);
if (iev_ldpe)
free(iev_ldpe);
free(iev_main);
log_info("label decision engine exiting");
zlog_fini();
exit(0);
}
/* imesg */
int
lde_imsg_compose_parent(int type, pid_t pid, void *data, uint16_t datalen)
{
if (iev_main->ibuf.fd == -1)
return (0);
return (imsg_compose_event(iev_main, type, 0, pid, -1, data, datalen));
}
void
lde_imsg_compose_parent_sync(int type, pid_t pid, void *data, uint16_t datalen)
{
if (iev_main_sync->ibuf.fd == -1)
return;
imsg_compose_event(iev_main_sync, type, 0, pid, -1, data, datalen);
imsg_flush(&iev_main_sync->ibuf);
}
int
lde_imsg_compose_ldpe(int type, uint32_t peerid, pid_t pid, void *data,
uint16_t datalen)
{
if (iev_ldpe->ibuf.fd == -1)
return (0);
return (imsg_compose_event(iev_ldpe, type, peerid, pid,
-1, data, datalen));
}
/* ARGSUSED */
static void lde_dispatch_imsg(struct event *thread)
{
struct imsgev *iev = EVENT_ARG(thread);
struct imsgbuf *ibuf = &iev->ibuf;
struct imsg imsg;
struct lde_nbr *ln;
struct map *map;
struct lde_addr *lde_addr;
struct notify_msg *nm;
ssize_t n;
int shut = 0;
iev->ev_read = NULL;
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
fatal("imsg_read error");
if (n == 0) /* connection closed */
shut = 1;
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("lde_dispatch_imsg: imsg_get error");
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_LABEL_MAPPING_FULL:
ln = lde_nbr_find(imsg.hdr.peerid);
if (ln == NULL) {
log_debug("%s: cannot find lde neighbor", __func__);
break;
}
fec_snap(ln);
break;
case IMSG_LABEL_MAPPING:
case IMSG_LABEL_REQUEST:
case IMSG_LABEL_RELEASE:
case IMSG_LABEL_WITHDRAW:
case IMSG_LABEL_ABORT:
if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct map))
fatalx("lde_dispatch_imsg: wrong imsg len");
map = imsg.data;
ln = lde_nbr_find(imsg.hdr.peerid);
if (ln == NULL) {
log_debug("%s: cannot find lde neighbor", __func__);
break;
}
switch (imsg.hdr.type) {
case IMSG_LABEL_MAPPING:
lde_check_mapping(map, ln, 1);
break;
case IMSG_LABEL_REQUEST:
lde_check_request(map, ln);
break;
case IMSG_LABEL_RELEASE:
lde_check_release(map, ln);
break;
case IMSG_LABEL_WITHDRAW:
lde_check_withdraw(map, ln);
break;
case IMSG_LABEL_ABORT:
/* not necessary */
break;
}
break;
case IMSG_ADDRESS_ADD:
if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct lde_addr))
fatalx("lde_dispatch_imsg: wrong imsg len");
lde_addr = imsg.data;
ln = lde_nbr_find(imsg.hdr.peerid);
if (ln == NULL) {
log_debug("%s: cannot find lde neighbor", __func__);
break;
}
if (lde_address_add(ln, lde_addr) < 0) {
log_debug("%s: cannot add address %s, it already exists", __func__,
log_addr(lde_addr->af, &lde_addr->addr));
}
break;
case IMSG_ADDRESS_DEL:
if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct lde_addr))
fatalx("lde_dispatch_imsg: wrong imsg len");
lde_addr = imsg.data;
ln = lde_nbr_find(imsg.hdr.peerid);
if (ln == NULL) {
log_debug("%s: cannot find lde neighbor", __func__);
break;
}
if (lde_address_del(ln, lde_addr) < 0) {
log_debug("%s: cannot delete address %s, it does not exist", __func__,
log_addr(lde_addr->af, &lde_addr->addr));
}
break;
case IMSG_NOTIFICATION:
if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct notify_msg))
fatalx("lde_dispatch_imsg: wrong imsg len");
nm = imsg.data;
ln = lde_nbr_find(imsg.hdr.peerid);
if (ln == NULL) {
log_debug("%s: cannot find lde neighbor", __func__);
break;
}
switch (nm->status_code) {
case S_PW_STATUS:
l2vpn_recv_pw_status(ln, nm);
break;
case S_ENDOFLIB:
/*
* Do nothing for now. Should be useful in
* the future when we implement LDP-IGP
* Synchronization (RFC 5443) and Graceful
* Restart (RFC 3478).
*/
default:
break;
}
break;
case IMSG_NEIGHBOR_UP:
if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct lde_nbr))
fatalx("lde_dispatch_imsg: wrong imsg len");
if (lde_nbr_find(imsg.hdr.peerid))
fatalx("lde_dispatch_imsg: neighbor already exists");
lde_nbr_new(imsg.hdr.peerid, imsg.data);
break;
case IMSG_NEIGHBOR_DOWN:
lde_nbr_del(lde_nbr_find(imsg.hdr.peerid));
break;
case IMSG_CTL_SHOW_LIB:
rt_dump(imsg.hdr.pid);
lde_imsg_compose_ldpe(IMSG_CTL_END, 0,
imsg.hdr.pid, NULL, 0);
break;
case IMSG_CTL_SHOW_L2VPN_PW:
l2vpn_pw_ctl(imsg.hdr.pid);
lde_imsg_compose_ldpe(IMSG_CTL_END, 0, imsg.hdr.pid, NULL, 0);
break;
case IMSG_CTL_SHOW_L2VPN_BINDING:
l2vpn_binding_ctl(imsg.hdr.pid);
lde_imsg_compose_ldpe(IMSG_CTL_END, 0, imsg.hdr.pid, NULL, 0);
break;
default:
log_debug("%s: unexpected imsg %d", __func__, imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
/* this pipe is dead, so remove the event handlers and exit */
EVENT_OFF(iev->ev_read);
EVENT_OFF(iev->ev_write);
lde_shutdown();
}
}
/* ARGSUSED */
static void lde_dispatch_parent(struct event *thread)
{
static struct ldpd_conf *nconf;
struct iface *iface, *niface;
struct tnbr *ntnbr;
struct nbr_params *nnbrp;
static struct l2vpn *l2vpn, *nl2vpn;
struct l2vpn_if *lif, *nlif;
struct l2vpn_pw *pw, *npw;
struct imsg imsg;
struct kif *kif;
struct kroute *kr;
int fd;
struct imsgev *iev = EVENT_ARG(thread);
struct imsgbuf *ibuf = &iev->ibuf;
ssize_t n;
int shut = 0;
struct fec fec;
struct ldp_access *laccess;
struct ldp_rlfa_node *rnode, *rntmp;
struct ldp_rlfa_client *rclient;
struct zapi_rlfa_request *rlfa_req;
struct zapi_rlfa_igp *rlfa_igp;
iev->ev_read = NULL;
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
fatal("imsg_read error");
if (n == 0) /* connection closed */
shut = 1;
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("lde_dispatch_parent: imsg_get error");
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_IFSTATUS:
if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct kif))
fatalx("IFSTATUS imsg with wrong len");
kif = imsg.data;
iface = if_lookup_name(ldeconf, kif->ifname);
if (iface) {
if_update_info(iface, kif);
/* if up see if any labels need to be updated */
if (kif->operative)
lde_route_update(iface, AF_UNSPEC);
break;
}
RB_FOREACH(l2vpn, l2vpn_head, &ldeconf->l2vpn_tree) {
lif = l2vpn_if_find(l2vpn, kif->ifname);
if (lif) {
l2vpn_if_update_info(lif, kif);
break;
}
pw = l2vpn_pw_find(l2vpn, kif->ifname);
if (pw) {
l2vpn_pw_update_info(pw, kif);
break;
}
}
break;
case IMSG_PW_UPDATE:
if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct zapi_pw_status))
fatalx("PW_UPDATE imsg with wrong len");
if (l2vpn_pw_status_update(imsg.data) != 0)
log_warnx("%s: error updating PW status", __func__);
break;
case IMSG_NETWORK_ADD:
case IMSG_NETWORK_UPDATE:
if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct kroute)) {
log_warnx("%s: wrong imsg len", __func__);
break;
}
kr = imsg.data;
switch (kr->af) {
case AF_INET:
fec.type = FEC_TYPE_IPV4;
fec.u.ipv4.prefix = kr->prefix.v4;
fec.u.ipv4.prefixlen = kr->prefixlen;
break;
case AF_INET6:
fec.type = FEC_TYPE_IPV6;
fec.u.ipv6.prefix = kr->prefix.v6;
fec.u.ipv6.prefixlen = kr->prefixlen;
break;
default:
fatalx("lde_dispatch_parent: unknown af");
}
switch (imsg.hdr.type) {
case IMSG_NETWORK_ADD:
lde_kernel_insert(&fec, kr->af, &kr->nexthop,
kr->ifindex, kr->route_type, kr->route_instance,
CHECK_FLAG(kr->flags, F_CONNECTED), NULL);
break;
case IMSG_NETWORK_UPDATE:
lde_kernel_update(&fec);
break;
}
break;
case IMSG_SOCKET_IPC:
if (iev_ldpe) {
log_warnx("%s: received unexpected imsg fd to ldpe", __func__);
break;
}
if ((fd = imsg.fd) == -1) {
log_warnx("%s: expected to receive imsg fd to ldpe but didn't receive any", __func__);
break;
}
if ((iev_ldpe = malloc(sizeof(struct imsgev))) == NULL)
fatal(NULL);
imsg_init(&iev_ldpe->ibuf, fd);
iev_ldpe->handler_read = lde_dispatch_imsg;
event_add_read(master, iev_ldpe->handler_read, iev_ldpe,
iev_ldpe->ibuf.fd, &iev_ldpe->ev_read);
iev_ldpe->handler_write = ldp_write_handler;
iev_ldpe->ev_write = NULL;
break;
case IMSG_INIT:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct ldpd_init))
fatalx("INIT imsg with wrong len");
memcpy(&init, imsg.data, sizeof(init));
lde_init(&init);
break;
case IMSG_AGENTX_ENABLED:
ldp_agentx_enabled();
break;
case IMSG_RECONF_CONF:
if ((nconf = malloc(sizeof(struct ldpd_conf))) == NULL)
fatal(NULL);
memcpy(nconf, imsg.data, sizeof(struct ldpd_conf));
RB_INIT(iface_head, &nconf->iface_tree);
RB_INIT(tnbr_head, &nconf->tnbr_tree);
RB_INIT(nbrp_head, &nconf->nbrp_tree);
RB_INIT(l2vpn_head, &nconf->l2vpn_tree);
break;
case IMSG_RECONF_IFACE:
if ((niface = malloc(sizeof(struct iface))) == NULL)
fatal(NULL);
memcpy(niface, imsg.data, sizeof(struct iface));
RB_INSERT(iface_head, &nconf->iface_tree, niface);
break;
case IMSG_RECONF_TNBR:
if ((ntnbr = malloc(sizeof(struct tnbr))) == NULL)
fatal(NULL);
memcpy(ntnbr, imsg.data, sizeof(struct tnbr));
RB_INSERT(tnbr_head, &nconf->tnbr_tree, ntnbr);
break;
case IMSG_RECONF_NBRP:
if ((nnbrp = malloc(sizeof(struct nbr_params))) == NULL)
fatal(NULL);
memcpy(nnbrp, imsg.data, sizeof(struct nbr_params));
RB_INSERT(nbrp_head, &nconf->nbrp_tree, nnbrp);
break;
case IMSG_RECONF_L2VPN:
if ((nl2vpn = malloc(sizeof(struct l2vpn))) == NULL)
fatal(NULL);
memcpy(nl2vpn, imsg.data, sizeof(struct l2vpn));
RB_INIT(l2vpn_if_head, &nl2vpn->if_tree);
RB_INIT(l2vpn_pw_head, &nl2vpn->pw_tree);
RB_INIT(l2vpn_pw_head, &nl2vpn->pw_inactive_tree);
RB_INSERT(l2vpn_head, &nconf->l2vpn_tree, nl2vpn);
break;
case IMSG_RECONF_L2VPN_IF:
if ((nlif = malloc(sizeof(struct l2vpn_if))) == NULL)
fatal(NULL);
memcpy(nlif, imsg.data, sizeof(struct l2vpn_if));
RB_INSERT(l2vpn_if_head, &nl2vpn->if_tree, nlif);
break;
case IMSG_RECONF_L2VPN_PW:
if ((npw = malloc(sizeof(struct l2vpn_pw))) == NULL)
fatal(NULL);
memcpy(npw, imsg.data, sizeof(struct l2vpn_pw));
RB_INSERT(l2vpn_pw_head, &nl2vpn->pw_tree, npw);
break;
case IMSG_RECONF_L2VPN_IPW:
if ((npw = malloc(sizeof(struct l2vpn_pw))) == NULL)
fatal(NULL);
memcpy(npw, imsg.data, sizeof(struct l2vpn_pw));
RB_INSERT(l2vpn_pw_head, &nl2vpn->pw_inactive_tree, npw);
break;
case IMSG_RECONF_END:
merge_config(ldeconf, nconf);
ldp_clear_config(nconf);
nconf = NULL;
break;
case IMSG_DEBUG_UPDATE:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(ldp_debug)) {
log_warnx("%s: wrong imsg len", __func__);
break;
}
memcpy(&ldp_debug, imsg.data, sizeof(ldp_debug));
break;
case IMSG_FILTER_UPDATE:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct ldp_access)) {
log_warnx("%s: wrong imsg len", __func__);
break;
}
laccess = imsg.data;
lde_check_filter_af(AF_INET, &ldeconf->ipv4,
laccess->name);
lde_check_filter_af(AF_INET6, &ldeconf->ipv6,
laccess->name);
break;
case IMSG_RLFA_REG:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct zapi_rlfa_request)) {
log_warnx("%s: wrong imsg len", __func__);
break;
}
rlfa_req = imsg.data;
rnode = rlfa_node_find(&rlfa_req->destination,
rlfa_req->pq_address);
if (!rnode)
rnode = rlfa_node_new(&rlfa_req->destination,
rlfa_req->pq_address);
rclient = rlfa_client_find(rnode, &rlfa_req->igp);
if (rclient)
/* RLFA already registered - do nothing */
break;
rclient = rlfa_client_new(rnode, &rlfa_req->igp);
lde_rlfa_check(rclient);
break;
case IMSG_RLFA_UNREG_ALL:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct zapi_rlfa_igp)) {
log_warnx("%s: wrong imsg len", __func__);
break;
}
rlfa_igp = imsg.data;
RB_FOREACH_SAFE (rnode, ldp_rlfa_node_head,
&rlfa_node_tree, rntmp) {
rclient = rlfa_client_find(rnode, rlfa_igp);
if (!rclient)
continue;
rlfa_client_del(rclient);
}
break;
default:
log_debug("%s: unexpected imsg %d", __func__, imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
/* this pipe is dead, so remove the event handlers and exit */
EVENT_OFF(iev->ev_read);
EVENT_OFF(iev->ev_write);
lde_shutdown();
}
}
int
lde_acl_check(char *acl_name, int af, union ldpd_addr *addr, uint8_t prefixlen)
{
return ldp_acl_request(iev_main_sync, acl_name, af, addr, prefixlen);
}
static bool lde_fec_connected(const struct fec_node *fn)
{
struct fec_nh *fnh;
LIST_FOREACH(fnh, &fn->nexthops, entry)
if (CHECK_FLAG(fnh->flags, F_FEC_NH_CONNECTED))
return true;
return false;
}
static bool lde_fec_outside_mpls_network(const struct fec_node *fn)
{
struct fec_nh *fnh;
LIST_FOREACH(fnh, &fn->nexthops, entry)
if (!CHECK_FLAG(fnh->flags, F_FEC_NH_NO_LDP))
return false;
return true;
}
uint32_t
lde_update_label(struct fec_node *fn)
{
/* should we allocate a label for this fec? */
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
if (CHECK_FLAG(ldeconf->ipv4.flags, F_LDPD_AF_ALLOCHOSTONLY)
&& fn->fec.u.ipv4.prefixlen != IPV4_MAX_BITLEN)
return (NO_LABEL);
if (lde_acl_check(ldeconf->ipv4.acl_label_allocate_for,
AF_INET, (union ldpd_addr *)&fn->fec.u.ipv4.prefix,
fn->fec.u.ipv4.prefixlen) != FILTER_PERMIT)
return (NO_LABEL);
break;
case FEC_TYPE_IPV6:
if (CHECK_FLAG(ldeconf->ipv6.flags, F_LDPD_AF_ALLOCHOSTONLY)
&& fn->fec.u.ipv6.prefixlen != IPV6_MAX_BITLEN)
return (NO_LABEL);
if (lde_acl_check(ldeconf->ipv6.acl_label_allocate_for,
AF_INET6, (union ldpd_addr *)&fn->fec.u.ipv6.prefix,
fn->fec.u.ipv6.prefixlen) != FILTER_PERMIT)
return (NO_LABEL);
break;
case FEC_TYPE_PWID:
break;
}
/*
* If connected interface act as egress for fec.
* If LDP is not configured on an interface but there
* are other NHs with interfaces configured with LDP
* then don't act as an egress for the fec, otherwise
* act as an egress for the fec
*/
if (lde_fec_connected(fn) || lde_fec_outside_mpls_network(fn)) {
/* choose implicit or explicit-null depending on configuration */
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
if (!CHECK_FLAG(ldeconf->ipv4.flags, F_LDPD_AF_EXPNULL))
return (MPLS_LABEL_IMPLICIT_NULL);
if (lde_acl_check(ldeconf->ipv4.acl_label_expnull_for,
AF_INET, (union ldpd_addr *)&fn->fec.u.ipv4.prefix,
fn->fec.u.ipv4.prefixlen) != FILTER_PERMIT)
return (MPLS_LABEL_IMPLICIT_NULL);
return MPLS_LABEL_IPV4_EXPLICIT_NULL;
case FEC_TYPE_IPV6:
if (!CHECK_FLAG(ldeconf->ipv6.flags, F_LDPD_AF_EXPNULL))
return (MPLS_LABEL_IMPLICIT_NULL);
if (lde_acl_check(ldeconf->ipv6.acl_label_expnull_for,
AF_INET6, (union ldpd_addr *)&fn->fec.u.ipv6.prefix,
fn->fec.u.ipv6.prefixlen) != FILTER_PERMIT)
return (MPLS_LABEL_IMPLICIT_NULL);
return MPLS_LABEL_IPV6_EXPLICIT_NULL;
case FEC_TYPE_PWID:
break;
}
}
/* preserve current label if there's no need to update it */
if (fn->local_label != NO_LABEL &&
fn->local_label > MPLS_LABEL_RESERVED_MAX)
return (fn->local_label);
return (lde_get_next_label());
}
void
lde_send_change_klabel(struct fec_node *fn, struct fec_nh *fnh)
{
struct kroute kr;
struct zapi_pw zpw;
struct l2vpn_pw *pw;
/*
* Ordered Control: don't program label into HW until a
* labelmap msg has been received from upstream router
*/
if (CHECK_FLAG(fnh->flags, F_FEC_NH_DEFER))
return;
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
memset(&kr, 0, sizeof(kr));
kr.af = AF_INET;
kr.prefix.v4 = fn->fec.u.ipv4.prefix;
kr.prefixlen = fn->fec.u.ipv4.prefixlen;
kr.nexthop.v4 = fnh->nexthop.v4;
kr.ifindex = fnh->ifindex;
kr.local_label = fn->local_label;
kr.remote_label = fnh->remote_label;
kr.route_type = fnh->route_type;
kr.route_instance = fnh->route_instance;
lde_imsg_compose_parent(IMSG_KLABEL_CHANGE, 0, &kr, sizeof(kr));
break;
case FEC_TYPE_IPV6:
memset(&kr, 0, sizeof(kr));
kr.af = AF_INET6;
kr.prefix.v6 = fn->fec.u.ipv6.prefix;
kr.prefixlen = fn->fec.u.ipv6.prefixlen;
kr.nexthop.v6 = fnh->nexthop.v6;
kr.ifindex = fnh->ifindex;
kr.local_label = fn->local_label;
kr.remote_label = fnh->remote_label;
kr.route_type = fnh->route_type;
kr.route_instance = fnh->route_instance;
lde_imsg_compose_parent(IMSG_KLABEL_CHANGE, 0, &kr, sizeof(kr));
break;
case FEC_TYPE_PWID:
pw = (struct l2vpn_pw *) fn->data;
if (!pw || fn->local_label == NO_LABEL ||
fnh->remote_label == NO_LABEL)
return;
pw->enabled = true;
pw2zpw(pw, &zpw);
zpw.local_label = fn->local_label;
zpw.remote_label = fnh->remote_label;
lde_imsg_compose_parent(IMSG_KPW_SET, 0, &zpw, sizeof(zpw));
break;
}
}
void
lde_send_delete_klabel(struct fec_node *fn, struct fec_nh *fnh)
{
struct kroute kr;
struct zapi_pw zpw;
struct l2vpn_pw *pw;
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
memset(&kr, 0, sizeof(kr));
kr.af = AF_INET;
kr.prefix.v4 = fn->fec.u.ipv4.prefix;
kr.prefixlen = fn->fec.u.ipv4.prefixlen;
kr.nexthop.v4 = fnh->nexthop.v4;
kr.ifindex = fnh->ifindex;
kr.local_label = fn->local_label;
kr.remote_label = fnh->remote_label;
kr.route_type = fnh->route_type;
kr.route_instance = fnh->route_instance;
lde_imsg_compose_parent(IMSG_KLABEL_DELETE, 0, &kr, sizeof(kr));
break;
case FEC_TYPE_IPV6:
memset(&kr, 0, sizeof(kr));
kr.af = AF_INET6;
kr.prefix.v6 = fn->fec.u.ipv6.prefix;
kr.prefixlen = fn->fec.u.ipv6.prefixlen;
kr.nexthop.v6 = fnh->nexthop.v6;
kr.ifindex = fnh->ifindex;
kr.local_label = fn->local_label;
kr.remote_label = fnh->remote_label;
kr.route_type = fnh->route_type;
kr.route_instance = fnh->route_instance;
lde_imsg_compose_parent(IMSG_KLABEL_DELETE, 0, &kr, sizeof(kr));
break;
case FEC_TYPE_PWID:
pw = (struct l2vpn_pw *) fn->data;
if (!pw)
return;
pw->enabled = false;
pw2zpw(pw, &zpw);
zpw.local_label = fn->local_label;
zpw.remote_label = fnh->remote_label;
lde_imsg_compose_parent(IMSG_KPW_UNSET, 0, &zpw, sizeof(zpw));
break;
}
}
void
lde_fec2prefix(const struct fec *fec, struct prefix *prefix)
{
memset(prefix, 0, sizeof(*prefix));
switch (fec->type) {
case FEC_TYPE_IPV4:
prefix->family = AF_INET;
prefix->u.prefix4 = fec->u.ipv4.prefix;
prefix->prefixlen = fec->u.ipv4.prefixlen;
break;
case FEC_TYPE_IPV6:
prefix->family = AF_INET6;
prefix->u.prefix6 = fec->u.ipv6.prefix;
prefix->prefixlen = fec->u.ipv6.prefixlen;
break;
case FEC_TYPE_PWID:
prefix->family = AF_UNSPEC;
break;
}
}
void
lde_prefix2fec(const struct prefix *prefix, struct fec *fec)
{
memset(fec, 0, sizeof(*fec));
switch (prefix->family) {
case AF_INET:
fec->type = FEC_TYPE_IPV4;
fec->u.ipv4.prefix = prefix->u.prefix4;
fec->u.ipv4.prefixlen = prefix->prefixlen;
break;
case AF_INET6:
fec->type = FEC_TYPE_IPV6;
fec->u.ipv6.prefix = prefix->u.prefix6;
fec->u.ipv6.prefixlen = prefix->prefixlen;
break;
default:
fatalx("lde_prefix2fec: unknown af");
break;
}
}
void
lde_fec2map(struct fec *fec, struct map *map)
{
memset(map, 0, sizeof(*map));
switch (fec->type) {
case FEC_TYPE_IPV4:
map->type = MAP_TYPE_PREFIX;
map->fec.prefix.af = AF_INET;
map->fec.prefix.prefix.v4 = fec->u.ipv4.prefix;
map->fec.prefix.prefixlen = fec->u.ipv4.prefixlen;
break;
case FEC_TYPE_IPV6:
map->type = MAP_TYPE_PREFIX;
map->fec.prefix.af = AF_INET6;
map->fec.prefix.prefix.v6 = fec->u.ipv6.prefix;
map->fec.prefix.prefixlen = fec->u.ipv6.prefixlen;
break;
case FEC_TYPE_PWID:
map->type = MAP_TYPE_PWID;
map->fec.pwid.type = fec->u.pwid.type;
map->fec.pwid.group_id = 0;
SET_FLAG(map->flags, F_MAP_PW_ID);
map->fec.pwid.pwid = fec->u.pwid.pwid;
break;
}
}
void
lde_map2fec(struct map *map, struct in_addr lsr_id, struct fec *fec)
{
memset(fec, 0, sizeof(*fec));
switch (map->type) {
case MAP_TYPE_PREFIX:
switch (map->fec.prefix.af) {
case AF_INET:
fec->type = FEC_TYPE_IPV4;
fec->u.ipv4.prefix = map->fec.prefix.prefix.v4;
fec->u.ipv4.prefixlen = map->fec.prefix.prefixlen;
break;
case AF_INET6:
fec->type = FEC_TYPE_IPV6;
fec->u.ipv6.prefix = map->fec.prefix.prefix.v6;
fec->u.ipv6.prefixlen = map->fec.prefix.prefixlen;
break;
default:
fatalx("lde_map2fec: unknown af");
break;
}
break;
case MAP_TYPE_PWID:
fec->type = FEC_TYPE_PWID;
fec->u.pwid.type = map->fec.pwid.type;
fec->u.pwid.pwid = map->fec.pwid.pwid;
fec->u.pwid.lsr_id = lsr_id;
break;
}
}
void
lde_send_labelmapping(struct lde_nbr *ln, struct fec_node *fn, int single)
{
struct lde_wdraw *lw;
struct lde_map *me;
struct lde_req *lre;
struct map map;
struct l2vpn_pw *pw;
struct fec_nh *fnh;
bool allow = false;
/*
* Ordered Control: do not send a labelmap msg until
* a labelmap message is received from downstream router
* and don't send labelmap back to downstream router
*/
if (CHECK_FLAG(ldeconf->flags, F_LDPD_ORDERED_CONTROL)) {
LIST_FOREACH(fnh, &fn->nexthops, entry) {
if (CHECK_FLAG(fnh->flags, F_FEC_NH_DEFER))
continue;
if (lde_address_find(ln, fnh->af, &fnh->nexthop))
return;
allow = true;
break;
}
if (!allow)
return;
}
/*
* We shouldn't send a new label mapping if we have a pending
* label release to receive. In this case, schedule to send a
* label mapping as soon as a label release is received.
*/
lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec);
if (lw) {
if (!fec_find(&ln->sent_map_pending, &fn->fec)) {
debug_evt("%s: FEC %s: scheduling to send label mapping later (waiting for pending label release)",
__func__, log_fec(&fn->fec));
lde_map_pending_add(ln, fn);
}
return;
}
/*
* This function skips SL.1 - 3 and SL.9 - 14 because the label
* allocation is done way earlier (because of the merging nature of
* ldpd).
*/
lde_fec2map(&fn->fec, &map);
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
if (!ln->v4_enabled)
return;
if (lde_acl_check(ldeconf->ipv4.acl_label_advertise_to,
AF_INET, (union ldpd_addr *)&ln->id, 32) != FILTER_PERMIT)
return;
if (lde_acl_check(ldeconf->ipv4.acl_label_advertise_for,
AF_INET, (union ldpd_addr *)&fn->fec.u.ipv4.prefix,
fn->fec.u.ipv4.prefixlen) != FILTER_PERMIT)
return;
break;
case FEC_TYPE_IPV6:
if (!ln->v6_enabled)
return;
if (lde_acl_check(ldeconf->ipv6.acl_label_advertise_to,
AF_INET, (union ldpd_addr *)&ln->id, 32) != FILTER_PERMIT)
return;
if (lde_acl_check(ldeconf->ipv6.acl_label_advertise_for,
AF_INET6, (union ldpd_addr *)&fn->fec.u.ipv6.prefix,
fn->fec.u.ipv6.prefixlen) != FILTER_PERMIT)
return;
break;
case FEC_TYPE_PWID:
pw = (struct l2vpn_pw *) fn->data;
if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr)
/* not the remote end of the pseudowire */
return;
SET_FLAG(map.flags, F_MAP_PW_IFMTU);
map.fec.pwid.ifmtu = pw->l2vpn->mtu;
if (CHECK_FLAG(pw->flags, F_PW_CWORD))
SET_FLAG(map.flags, F_MAP_PW_CWORD);
if (CHECK_FLAG(pw->flags, F_PW_STATUSTLV)) {
SET_FLAG(map.flags, F_MAP_PW_STATUS);
map.pw_status = pw->local_status;
}
break;
}
map.label = fn->local_label;
/* SL.6: is there a pending request for this mapping? */
lre = (struct lde_req *)fec_find(&ln->recv_req, &fn->fec);
if (lre) {
/* set label request msg id in the mapping response. */
map.requestid = lre->msg_id;
map.flags = F_MAP_REQ_ID;
/* SL.7: delete record of pending request */
lde_req_del(ln, lre, 0);
}
/* SL.4: send label mapping */
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD, ln->peerid, 0,
&map, sizeof(map));
if (single)
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0,
NULL, 0);
/* SL.5: record sent label mapping */
me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec);
if (me == NULL)
me = lde_map_add(ln, fn, 1);
me->map = map;
}
void
lde_send_labelwithdraw(struct lde_nbr *ln, struct fec_node *fn,
struct map *wcard, struct status_tlv *st)
{
struct lde_wdraw *lw;
struct map map;
struct fec *f;
struct l2vpn_pw *pw;
if (fn) {
lde_fec2map(&fn->fec, &map);
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
if (!ln->v4_enabled)
return;
break;
case FEC_TYPE_IPV6:
if (!ln->v6_enabled)
return;
break;
case FEC_TYPE_PWID:
pw = (struct l2vpn_pw *) fn->data;
if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr)
/* not the remote end of the pseudowire */
return;
if (CHECK_FLAG(pw->flags, F_PW_CWORD))
SET_FLAG(map.flags, F_MAP_PW_CWORD);
break;
}
map.label = fn->local_label;
} else
memcpy(&map, wcard, sizeof(map));
if (st) {
map.st.status_code = st->status_code;
map.st.msg_id = st->msg_id;
map.st.msg_type = st->msg_type;
SET_FLAG(map.flags, F_MAP_STATUS);
}
/* SWd.1: send label withdraw. */
lde_imsg_compose_ldpe(IMSG_WITHDRAW_ADD, ln->peerid, 0,
&map, sizeof(map));
lde_imsg_compose_ldpe(IMSG_WITHDRAW_ADD_END, ln->peerid, 0, NULL, 0);
/* SWd.2: record label withdraw. */
if (fn) {
lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec);
if (lw == NULL)
lw = lde_wdraw_add(ln, fn);
lw->label = map.label;
} else {
struct lde_map *me;
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec);
if (lde_wildcard_apply(wcard, &fn->fec, me) == 0)
continue;
lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec);
if (lw == NULL)
lw = lde_wdraw_add(ln, fn);
lw->label = map.label;
}
}
}
void
lde_send_labelwithdraw_wcard(struct lde_nbr *ln, uint32_t label)
{
struct map wcard;
memset(&wcard, 0, sizeof(wcard));
wcard.type = MAP_TYPE_WILDCARD;
wcard.label = label;
lde_send_labelwithdraw(ln, NULL, &wcard, NULL);
}
void
lde_send_labelwithdraw_twcard_prefix(struct lde_nbr *ln, uint16_t af,
uint32_t label)
{
struct map wcard;
memset(&wcard, 0, sizeof(wcard));
wcard.type = MAP_TYPE_TYPED_WCARD;
wcard.fec.twcard.type = MAP_TYPE_PREFIX;
wcard.fec.twcard.u.prefix_af = af;
wcard.label = label;
lde_send_labelwithdraw(ln, NULL, &wcard, NULL);
}
void
lde_send_labelwithdraw_twcard_pwid(struct lde_nbr *ln, uint16_t pw_type,
uint32_t label)
{
struct map wcard;
memset(&wcard, 0, sizeof(wcard));
wcard.type = MAP_TYPE_TYPED_WCARD;
wcard.fec.twcard.type = MAP_TYPE_PWID;
wcard.fec.twcard.u.pw_type = pw_type;
wcard.label = label;
lde_send_labelwithdraw(ln, NULL, &wcard, NULL);
}
void
lde_send_labelwithdraw_pwid_wcard(struct lde_nbr *ln, uint16_t pw_type,
uint32_t group_id)
{
struct map wcard;
memset(&wcard, 0, sizeof(wcard));
wcard.type = MAP_TYPE_PWID;
wcard.fec.pwid.type = pw_type;
wcard.fec.pwid.group_id = group_id;
/* we can not append a Label TLV when using PWid group wildcards. */
wcard.label = NO_LABEL;
lde_send_labelwithdraw(ln, NULL, &wcard, NULL);
}
void
lde_send_labelrelease(struct lde_nbr *ln, struct fec_node *fn,
struct map *wcard, uint32_t label)
{
struct map map;
struct l2vpn_pw *pw;
if (fn) {
lde_fec2map(&fn->fec, &map);
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
if (!ln->v4_enabled)
return;
break;
case FEC_TYPE_IPV6:
if (!ln->v6_enabled)
return;
break;
case FEC_TYPE_PWID:
pw = (struct l2vpn_pw *) fn->data;
if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr)
/* not the remote end of the pseudowire */
return;
if (CHECK_FLAG(pw->flags, F_PW_CWORD))
SET_FLAG(map.flags, F_MAP_PW_CWORD);
break;
}
} else
memcpy(&map, wcard, sizeof(map));
map.label = label;
lde_imsg_compose_ldpe(IMSG_RELEASE_ADD, ln->peerid, 0,
&map, sizeof(map));
lde_imsg_compose_ldpe(IMSG_RELEASE_ADD_END, ln->peerid, 0, NULL, 0);
}
void
lde_send_labelrequest(struct lde_nbr *ln, struct fec_node *fn,
struct map *wcard, int single)
{
struct map map;
struct fec *f;
struct lde_req *lre;
if (fn) {
lde_fec2map(&fn->fec, &map);
switch (fn->fec.type) {
case FEC_TYPE_IPV4:
if (!ln->v4_enabled)
return;
break;
case FEC_TYPE_IPV6:
if (!ln->v6_enabled)
return;
break;
case FEC_TYPE_PWID:
fatalx("lde_send_labelrequest: unknown af");
}
} else
memcpy(&map, wcard, sizeof(map));
map.label = NO_LABEL;
if (fn) {
/* SLR1.1: has label request for FEC been previously sent
* and still outstanding just return,
*/
lre = (struct lde_req *)fec_find(&ln->sent_req, &fn->fec);
if (lre == NULL) {
/* SLRq.3: send label request */
lde_imsg_compose_ldpe(IMSG_REQUEST_ADD, ln->peerid, 0,
&map, sizeof(map));
if (single)
lde_imsg_compose_ldpe(IMSG_REQUEST_ADD_END,
ln->peerid, 0, NULL, 0);
/* SLRq.4: record sent request */
lde_req_add(ln, &fn->fec, 1);
}
} else {
/* if Wilcard just send label request */
/* SLRq.3: send label request */
lde_imsg_compose_ldpe(IMSG_REQUEST_ADD,
ln->peerid, 0, &map, sizeof(map));
if (single)
lde_imsg_compose_ldpe(IMSG_REQUEST_ADD_END, ln->peerid, 0, NULL, 0);
/* SLRq.4: record sent request */
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
lre = (struct lde_req *)fec_find(&ln->sent_req, &fn->fec);
if (lde_wildcard_apply(wcard, &fn->fec, NULL) == 0)
continue;
if (lre == NULL)
lde_req_add(ln, f, 1);
}
}
}
void
lde_send_labelrequest_wcard(struct lde_nbr *ln, uint16_t af)
{
struct map wcard;
memset(&wcard, 0, sizeof(wcard));
wcard.type = MAP_TYPE_TYPED_WCARD;
wcard.fec.twcard.type = MAP_TYPE_PREFIX;
wcard.fec.twcard.u.prefix_af = af;
lde_send_labelrequest(ln, NULL, &wcard, 1);
}
void
lde_send_notification(struct lde_nbr *ln, uint32_t status_code, uint32_t msg_id,
uint16_t msg_type)
{
struct notify_msg nm;
memset(&nm, 0, sizeof(nm));
nm.status_code = status_code;
/* 'msg_id' and 'msg_type' should be in network byte order */
nm.msg_id = msg_id;
nm.msg_type = msg_type;
lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0,
&nm, sizeof(nm));
}
void
lde_send_notification_eol_prefix(struct lde_nbr *ln, int af)
{
struct notify_msg nm;
memset(&nm, 0, sizeof(nm));
nm.status_code = S_ENDOFLIB;
nm.fec.type = MAP_TYPE_TYPED_WCARD;
nm.fec.fec.twcard.type = MAP_TYPE_PREFIX;
nm.fec.fec.twcard.u.prefix_af = af;
SET_FLAG(nm.flags, F_NOTIF_FEC);
lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0,
&nm, sizeof(nm));
}
void
lde_send_notification_eol_pwid(struct lde_nbr *ln, uint16_t pw_type)
{
struct notify_msg nm;
memset(&nm, 0, sizeof(nm));
nm.status_code = S_ENDOFLIB;
nm.fec.type = MAP_TYPE_TYPED_WCARD;
nm.fec.fec.twcard.type = MAP_TYPE_PWID;
nm.fec.fec.twcard.u.pw_type = pw_type;
SET_FLAG(nm.flags, F_NOTIF_FEC);
lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0,
&nm, sizeof(nm));
}
static __inline int
lde_nbr_compare(const struct lde_nbr *a, const struct lde_nbr *b)
{
return (a->peerid - b->peerid);
}
static struct lde_nbr *
lde_nbr_new(uint32_t peerid, struct lde_nbr *new)
{
struct lde_nbr *ln;
if ((ln = calloc(1, sizeof(*ln))) == NULL)
fatal(__func__);
ln->id = new->id;
ln->v4_enabled = new->v4_enabled;
ln->v6_enabled = new->v6_enabled;
ln->flags = new->flags;
ln->peerid = peerid;
fec_init(&ln->recv_map);
fec_init(&ln->sent_map);
fec_init(&ln->sent_map_pending);
fec_init(&ln->recv_req);
fec_init(&ln->sent_req);
fec_init(&ln->sent_wdraw);
TAILQ_INIT(&ln->addr_list);
if (RB_INSERT(nbr_tree, &lde_nbrs, ln) != NULL)
fatalx("lde_nbr_new: RB_INSERT failed");
return (ln);
}
static void
lde_nbr_del(struct lde_nbr *ln)
{
struct fec *f;
struct fec_node *fn;
struct fec_nh *fnh;
struct l2vpn_pw *pw;
struct lde_nbr *lnbr;
if (ln == NULL)
return;
/* uninstall received mappings */
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
/* Update RLFA clients. */
lde_rlfa_update_clients(f, ln, MPLS_INVALID_LABEL);
LIST_FOREACH(fnh, &fn->nexthops, entry) {
switch (f->type) {
case FEC_TYPE_IPV4:
case FEC_TYPE_IPV6:
if (!lde_address_find(ln, fnh->af, &fnh->nexthop))
continue;
/*
* Ordered Control: must mark any non-connected
* NH to wait until we receive a labelmap msg
* before installing in kernel and sending to
* peer, must do this as NHs are not removed
* when lsps go down. Also send label withdraw
* to other neighbors for all fecs from neighbor
* going down
*/
if (CHECK_FLAG(ldeconf->flags, F_LDPD_ORDERED_CONTROL)) {
SET_FLAG(fnh->flags, F_FEC_NH_DEFER);
RB_FOREACH(lnbr, nbr_tree, &lde_nbrs) {
if (ln->peerid == lnbr->peerid)
continue;
lde_send_labelwithdraw(lnbr, fn, NULL, NULL);
}
}
break;
case FEC_TYPE_PWID:
if (f->u.pwid.lsr_id.s_addr != ln->id.s_addr)
continue;
pw = (struct l2vpn_pw *) fn->data;
if (pw) {
pw->reason = F_PW_NO_REMOTE_LABEL;
l2vpn_pw_reset(pw);
}
break;
default:
break;
}
lde_send_delete_klabel(fn, fnh);
fnh->remote_label = NO_LABEL;
}
}
lde_address_list_free(ln);
fec_clear(&ln->recv_map, lde_map_free);
fec_clear(&ln->sent_map, lde_map_free);
fec_clear(&ln->sent_map_pending, free);
fec_clear(&ln->recv_req, free);
fec_clear(&ln->sent_req, free);
fec_clear(&ln->sent_wdraw, free);
RB_REMOVE(nbr_tree, &lde_nbrs, ln);
free(ln);
}
static struct lde_nbr *
lde_nbr_find(uint32_t peerid)
{
struct lde_nbr ln;
ln.peerid = peerid;
return (RB_FIND(nbr_tree, &lde_nbrs, &ln));
}
struct lde_nbr *
lde_nbr_find_by_lsrid(struct in_addr addr)
{
struct lde_nbr *ln;
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
if (ln->id.s_addr == addr.s_addr)
return (ln);
return (NULL);
}
struct lde_nbr *
lde_nbr_find_by_addr(int af, union ldpd_addr *addr)
{
struct lde_nbr *ln;
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
if (lde_address_find(ln, af, addr) != NULL)
return (ln);
return (NULL);
}
static void
lde_nbr_clear(void)
{
struct lde_nbr *ln;
while (!RB_EMPTY(nbr_tree, &lde_nbrs)) {
ln = RB_ROOT(nbr_tree, &lde_nbrs);
lde_nbr_del(ln);
}
}
static void
lde_nbr_addr_update(struct lde_nbr *ln, struct lde_addr *lde_addr, int removed)
{
struct fec *fec;
struct fec_node *fn;
struct fec_nh *fnh;
struct lde_map *me;
RB_FOREACH(fec, fec_tree, &ln->recv_map) {
switch (fec->type) {
case FEC_TYPE_IPV4:
if (lde_addr->af != AF_INET)
continue;
break;
case FEC_TYPE_IPV6:
if (lde_addr->af != AF_INET6)
continue;
break;
case FEC_TYPE_PWID:
continue;
}
fn = (struct fec_node *)fec_find(&ft, fec);
if (fn == NULL)
/* shouldn't happen */
continue;
LIST_FOREACH(fnh, &fn->nexthops, entry) {
if (ldp_addrcmp(fnh->af, &fnh->nexthop, &lde_addr->addr))
continue;
if (removed) {
lde_send_delete_klabel(fn, fnh);
fnh->remote_label = NO_LABEL;
} else {
me = (struct lde_map *)fec;
fnh->remote_label = me->map.label;
lde_send_change_klabel(fn, fnh);
}
break;
}
}
}
void
lde_allow_broken_lsp_update(int new_config)
{
struct fec_node *fn;
struct fec_nh *fnh;
struct fec *f;
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
LIST_FOREACH(fnh, &fn->nexthops, entry) {
/* allow-broken-lsp config is changing so
* we need to reprogram labeled routes to
* have proper top-level label
*/
if (!(new_config & F_LDPD_ALLOW_BROKEN_LSP))
lde_send_delete_klabel(fn, fnh);
if (fn->local_label != NO_LABEL)
lde_send_change_klabel(fn, fnh);
}
}
}
static __inline int
lde_map_compare(const struct lde_map *a, const struct lde_map *b)
{
return (ldp_addrcmp(AF_INET, (union ldpd_addr *)&a->nexthop->id,
(union ldpd_addr *)&b->nexthop->id));
}
struct lde_map *
lde_map_add(struct lde_nbr *ln, struct fec_node *fn, int sent)
{
struct lde_map *me;
me = calloc(1, sizeof(*me));
if (me == NULL)
fatal(__func__);
me->fec = fn->fec;
me->nexthop = ln;
if (sent) {
RB_INSERT(lde_map_head, &fn->upstream, me);
me->head = &fn->upstream;
if (fec_insert(&ln->sent_map, &me->fec))
log_warnx("failed to add %s to sent map", log_fec(&me->fec));
/* XXX on failure more cleanup is needed */
} else {
RB_INSERT(lde_map_head, &fn->downstream, me);
me->head = &fn->downstream;
if (fec_insert(&ln->recv_map, &me->fec))
log_warnx("failed to add %s to recv map", log_fec(&me->fec));
}
return (me);
}
void
lde_map_del(struct lde_nbr *ln, struct lde_map *me, int sent)
{
if (sent)
fec_remove(&ln->sent_map, &me->fec);
else
fec_remove(&ln->recv_map, &me->fec);
lde_map_free(me);
}
static void
lde_map_free(void *ptr)
{
struct lde_map *map = ptr;
RB_REMOVE(lde_map_head, map->head, map);
free(map);
}
struct fec *
lde_map_pending_add(struct lde_nbr *ln, struct fec_node *fn)
{
struct fec *map;
map = calloc(1, sizeof(*map));
if (map == NULL)
fatal(__func__);
*map = fn->fec;
if (fec_insert(&ln->sent_map_pending, map))
log_warnx("failed to add %s to sent map (pending)", log_fec(map));
return (map);
}
void
lde_map_pending_del(struct lde_nbr *ln, struct fec *map)
{
fec_remove(&ln->sent_map_pending, map);
free(map);
}
struct lde_req *
lde_req_add(struct lde_nbr *ln, struct fec *fec, int sent)
{
struct fec_tree *t;
struct lde_req *lre;
t = sent ? &ln->sent_req : &ln->recv_req;
lre = calloc(1, sizeof(*lre));
if (lre != NULL) {
lre->fec = *fec;
if (fec_insert(t, &lre->fec)) {
log_warnx("failed to add %s to %s req",
log_fec(&lre->fec), sent ? "sent" : "recv");
free(lre);
return (NULL);
}
}
return (lre);
}
void
lde_req_del(struct lde_nbr *ln, struct lde_req *lre, int sent)
{
if (sent)
fec_remove(&ln->sent_req, &lre->fec);
else
fec_remove(&ln->recv_req, &lre->fec);
free(lre);
}
struct lde_wdraw *
lde_wdraw_add(struct lde_nbr *ln, struct fec_node *fn)
{
struct lde_wdraw *lw;
lw = calloc(1, sizeof(*lw));
if (lw == NULL)
fatal(__func__);
lw->fec = fn->fec;
if (fec_insert(&ln->sent_wdraw, &lw->fec))
log_warnx("failed to add %s to sent wdraw", log_fec(&lw->fec));
return (lw);
}
void
lde_wdraw_del(struct lde_nbr *ln, struct lde_wdraw *lw)
{
fec_remove(&ln->sent_wdraw, &lw->fec);
free(lw);
}
void
lde_change_egress_label(int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
/* explicitly withdraw all null labels */
RB_FOREACH(ln, nbr_tree, &lde_nbrs) {
lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IMPLICIT_NULL);
if (ln->v4_enabled)
lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IPV4_EXPLICIT_NULL);
if (ln->v6_enabled)
lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IPV6_EXPLICIT_NULL);
}
/* update label of connected routes */
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
if (fn->local_label > MPLS_LABEL_RESERVED_MAX)
continue;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
break;
default:
fatalx("lde_change_egress_label: unknown af");
}
fn->local_label = lde_update_label(fn);
if (fn->local_label != NO_LABEL)
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelmapping(ln, fn, 0);
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, NULL, 0);
}
void
lde_change_allocate_filter(int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
uint32_t new_label;
/* reallocate labels for fecs that match this filter */
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
break;
default:
fatalx("lde_change_allocate_filter: unknown af");
}
/*
* If the local label has changed to NO_LABEL, send a label
* withdraw to all peers.
* If the local label has changed and it's different from
* NO_LABEL, send a label mapping to all peers advertising
* the new label.
* If the local label hasn't changed, do nothing
*/
new_label = lde_update_label(fn);
if (fn->local_label != new_label) {
if (new_label == NO_LABEL)
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelwithdraw(ln, fn, NULL, NULL);
fn->local_label = new_label;
if (fn->local_label != NO_LABEL)
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelmapping(ln, fn, 0);
}
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0,
NULL, 0);
}
void
lde_change_advertise_filter(int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
char *acl_to_filter;
char *acl_for_filter;
union ldpd_addr *prefix;
uint8_t plen;
struct lde_map *me;
/* advertise label for fecs to neighbors if matches advertise filters */
switch (af) {
case AF_INET:
acl_to_filter = ldeconf->ipv4.acl_label_advertise_to;
acl_for_filter = ldeconf->ipv4.acl_label_advertise_for;
break;
case AF_INET6:
acl_to_filter = ldeconf->ipv6.acl_label_advertise_to;
acl_for_filter = ldeconf->ipv6.acl_label_advertise_for;
break;
default:
fatalx("lde_change_advertise_filter: unknown af");
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs) {
if (lde_acl_check(acl_to_filter, af, (union ldpd_addr *)&ln->id,
IPV4_MAX_BITLEN) != FILTER_PERMIT)
lde_send_labelwithdraw_wcard(ln, NO_LABEL);
else {
/* This neighbor is allowed in to_filter, so
* send labels if fec also matches for_filter
*/
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
prefix = (union ldpd_addr *)&fn->fec.u.ipv4.prefix;
plen = fn->fec.u.ipv4.prefixlen;
break;
case FEC_TYPE_IPV6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
prefix = (union ldpd_addr *)&fn->fec.u.ipv6.prefix;
plen = fn->fec.u.ipv6.prefixlen;
break;
default:
continue;
}
if (lde_acl_check(acl_for_filter, af,
prefix, plen) != FILTER_PERMIT) {
me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec);
if (me)
/* fec filtered withdraw */
lde_send_labelwithdraw(ln, fn, NULL, NULL);
} else
/* fec allowed send map */
lde_send_labelmapping(ln, fn, 0);
}
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, NULL, 0);
}
}
}
void
lde_change_accept_filter(int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
char *acl_for_filter;
char *acl_from_filter;
union ldpd_addr *prefix;
uint8_t plen;
struct lde_map *me;
enum fec_type type;
/* accept labels from neighbors specified in the from_filter and for
* fecs defined in the for_filter
*/
switch (af) {
case AF_INET:
acl_for_filter = ldeconf->ipv4.acl_label_accept_for;
acl_from_filter = ldeconf->ipv4.acl_label_accept_from;
type = FEC_TYPE_IPV4;
break;
case AF_INET6:
acl_for_filter = ldeconf->ipv6.acl_label_accept_for;
acl_from_filter = ldeconf->ipv6.acl_label_accept_from;
type = FEC_TYPE_IPV6;
break;
default:
fatalx("lde_change_accept_filter: unknown af");
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs) {
if (lde_acl_check(acl_from_filter, AF_INET, (union ldpd_addr *)
&ln->id, IPV4_MAX_BITLEN) != FILTER_PERMIT) {
/* This neighbor is now filtered so remove fecs from
* recv list
*/
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
if (fn->fec.type == type) {
me = (struct lde_map *)fec_find(&ln->recv_map, &fn->fec);
if (me)
lde_map_del(ln, me, 0);
}
}
} else if (CHECK_FLAG(ln->flags, F_NBR_CAP_TWCARD)) {
/* This neighbor is allowed and supports type
* wildcard so send a labelrequest
* to get any new labels from neighbor
* and make sure any fecs we currently have
* match for_filter.
*/
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
prefix = (union ldpd_addr *)&fn->fec.u.ipv4.prefix;
plen = fn->fec.u.ipv4.prefixlen;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
prefix = (union ldpd_addr *)&fn->fec.u.ipv6.prefix;
plen = fn->fec.u.ipv6.prefixlen;
break;
default:
continue;
}
if (lde_acl_check(acl_for_filter, af,
prefix, plen) != FILTER_PERMIT) {
me = (struct lde_map *)fec_find(&ln->recv_map, &fn->fec);
if (me)
lde_map_del(ln, me, 0);
}
}
lde_send_labelrequest_wcard(ln, af);
} else
/* Type Wildcard is not supported so restart session */
lde_imsg_compose_ldpe(IMSG_NBR_SHUTDOWN, ln->peerid, 0, NULL, 0);
}
}
void
lde_change_expnull_for_filter(int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
char *acl_name;
uint32_t exp_label;
union ldpd_addr *prefix;
uint8_t plen;
/* Configure explicit-null advertisement for all fecs in this filter */
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
acl_name = ldeconf->ipv4.acl_label_expnull_for;
prefix = (union ldpd_addr *)&fn->fec.u.ipv4.prefix;
plen = fn->fec.u.ipv4.prefixlen;
exp_label = MPLS_LABEL_IPV4_EXPLICIT_NULL;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
acl_name = ldeconf->ipv6.acl_label_expnull_for;
prefix = (union ldpd_addr *)&fn->fec.u.ipv6.prefix;
plen = fn->fec.u.ipv6.prefixlen;
exp_label = MPLS_LABEL_IPV6_EXPLICIT_NULL;
break;
default:
fatalx("lde_change_expnull_for_filter: unknown af");
}
if (lde_acl_check(acl_name, af, prefix, plen) == FILTER_PERMIT) {
/* for this fec change any imp-null to exp-null */
if (fn->local_label == MPLS_LABEL_IMPLICIT_NULL) {
fn->local_label= lde_update_label(fn);
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelmapping(ln, fn, 0);
}
} else {
/* for this fec change any exp-null back to imp-null */
if (fn->local_label == exp_label) {
fn->local_label = lde_update_label(fn);
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelmapping(ln, fn, 0);
}
}
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0,
NULL, 0);
}
static int
lde_address_add(struct lde_nbr *ln, struct lde_addr *lde_addr)
{
struct lde_addr *new;
if (lde_address_find(ln, lde_addr->af, &lde_addr->addr) != NULL)
return (-1);
if ((new = calloc(1, sizeof(*new))) == NULL)
fatal(__func__);
new->af = lde_addr->af;
new->addr = lde_addr->addr;
TAILQ_INSERT_TAIL(&ln->addr_list, new, entry);
/* reevaluate the previously received mappings from this neighbor */
lde_nbr_addr_update(ln, lde_addr, 0);
return (0);
}
static int
lde_address_del(struct lde_nbr *ln, struct lde_addr *lde_addr)
{
lde_addr = lde_address_find(ln, lde_addr->af, &lde_addr->addr);
if (lde_addr == NULL)
return (-1);
/* reevaluate the previously received mappings from this neighbor */
lde_nbr_addr_update(ln, lde_addr, 1);
TAILQ_REMOVE(&ln->addr_list, lde_addr, entry);
free(lde_addr);
return (0);
}
struct lde_addr *
lde_address_find(struct lde_nbr *ln, int af, union ldpd_addr *addr)
{
struct lde_addr *lde_addr;
TAILQ_FOREACH(lde_addr, &ln->addr_list, entry)
if (lde_addr->af == af &&
ldp_addrcmp(af, &lde_addr->addr, addr) == 0)
return (lde_addr);
return (NULL);
}
static void
lde_address_list_free(struct lde_nbr *ln)
{
struct lde_addr *lde_addr;
while ((lde_addr = TAILQ_POP_FIRST(&ln->addr_list, entry)) != NULL)
free(lde_addr);
}
/*
* Event callback used to retry the label-manager sync zapi session.
*/
static void zclient_sync_retry(struct event *thread)
{
zclient_sync_init();
}
/*
* Initialize and open a synchronous zapi session. This is used by label chunk
* management code, which acquires and releases blocks of labels from the
* zebra label-manager module.
*/
static void zclient_sync_init(void)
{
/* Initialize special zclient for synchronous message exchanges. */
zclient_sync = zclient_new(master, &zclient_options_sync, NULL, 0);
zclient_sync->sock = -1;
zclient_sync->redist_default = ZEBRA_ROUTE_LDP;
zclient_sync->session_id = 1; /* Distinguish from main session */
zclient_sync->privs = &lde_privs;
if (zclient_socket_connect(zclient_sync) < 0) {
log_warnx("Error connecting synchronous zclient!");
goto retry;
}
/* make socket non-blocking */
sock_set_nonblock(zclient_sync->sock);
/* Send hello to notify zebra this is a synchronous client */
if (zclient_send_hello(zclient_sync) == ZCLIENT_SEND_FAILURE) {
log_warnx("Error sending hello for synchronous zclient!");
goto retry;
}
/* Connect to label manager */
if (lm_label_manager_connect(zclient_sync, 0) != 0) {
log_warnx("Error connecting to label manager!");
goto retry;
}
/* Finish label-manager init once the LM session is running */
lde_label_list_init();
return;
retry:
/* Discard failed zclient object */
zclient_stop(zclient_sync);
zclient_free(zclient_sync);
zclient_sync = NULL;
/* Retry using a timer */
event_add_timer(master, zclient_sync_retry, NULL, 1, NULL);
}
static void
lde_del_label_chunk(void *val)
{
free(val);
}
static int
lde_release_label_chunk(uint32_t start, uint32_t end)
{
int ret;
ret = lm_release_label_chunk(zclient_sync, start, end);
if (ret < 0) {
log_warnx("Error releasing label chunk!");
return (-1);
}
return (0);
}
static int
lde_get_label_chunk(void)
{
int ret;
uint32_t start, end;
debug_labels("getting label chunk (size %u)", CHUNK_SIZE);
ret = lm_get_label_chunk(zclient_sync, 0, MPLS_LABEL_BASE_ANY,
CHUNK_SIZE, &start, &end);
if (ret < 0) {
log_warnx("Error getting label chunk!");
return -1;
}
on_get_label_chunk_response(start, end);
return (0);
}
static void
lde_label_list_init(void)
{
label_chunk_list = list_new();
label_chunk_list->del = lde_del_label_chunk;
/* get first chunk */
while (lde_get_label_chunk () != 0) {
log_warnx("Error getting first label chunk!");
sleep(1);
}
}
static void
on_get_label_chunk_response(uint32_t start, uint32_t end)
{
struct label_chunk *new_label_chunk;
debug_labels("label chunk assign: %u - %u", start, end);
new_label_chunk = calloc(1, sizeof(struct label_chunk));
if (!new_label_chunk) {
log_warn("Error trying to allocate label chunk %u - %u", start, end);
return;
}
new_label_chunk->start = start;
new_label_chunk->end = end;
new_label_chunk->used_mask = 0;
listnode_add(label_chunk_list, (void *)new_label_chunk);
/* let's update current if needed */
if (!current_label_chunk)
current_label_chunk = listtail(label_chunk_list);
}
void
lde_free_label(uint32_t label)
{
struct listnode *node;
struct label_chunk *label_chunk;
uint64_t pos;
for (ALL_LIST_ELEMENTS_RO(label_chunk_list, node, label_chunk)) {
if (label <= label_chunk->end && label >= label_chunk->start) {
pos = 1ULL << (label - label_chunk->start);
UNSET_FLAG(label_chunk->used_mask, pos);
/* if nobody is using this chunk and it's not current_label_chunk, then free it */
if (!label_chunk->used_mask && (current_label_chunk != node)) {
if (lde_release_label_chunk(label_chunk->start, label_chunk->end) != 0)
log_warnx("%s: Error releasing label chunk!", __func__);
else {
listnode_delete(label_chunk_list, label_chunk);
lde_del_label_chunk(label_chunk);
}
}
break;
}
}
return;
}
static uint32_t
lde_get_next_label(void)
{
struct label_chunk *label_chunk;
uint32_t i, size;
uint64_t pos;
uint32_t label = NO_LABEL;
while (current_label_chunk) {
label_chunk = listgetdata(current_label_chunk);
if (!label_chunk)
goto end;
/* try to get next free label in currently used label chunk */
size = label_chunk->end - label_chunk->start + 1;
for (i = 0, pos = 1; i < size; i++, pos <<= 1) {
if (!(pos & label_chunk->used_mask)) {
SET_FLAG(label_chunk->used_mask, pos);
label = label_chunk->start + i;
goto end;
}
}
current_label_chunk = listnextnode(current_label_chunk);
}
end:
/* we moved till the last chunk, or were not able to find a label,
so let's ask for another one */
if (!current_label_chunk ||
current_label_chunk == listtail(label_chunk_list) ||
label == NO_LABEL) {
if (lde_get_label_chunk() != 0)
log_warn("%s: Error getting label chunk!", __func__);
}
return (label);
}
static void
lde_check_filter_af(int af, struct ldpd_af_conf *af_conf,
const char *filter_name)
{
if (strcmp(af_conf->acl_label_allocate_for, filter_name) == 0)
lde_change_allocate_filter(af);
if ((strcmp(af_conf->acl_label_advertise_to, filter_name) == 0)
|| (strcmp(af_conf->acl_label_advertise_for, filter_name) == 0))
lde_change_advertise_filter(af);
if ((strcmp(af_conf->acl_label_accept_for, filter_name) == 0)
|| (strcmp(af_conf->acl_label_accept_from, filter_name) == 0))
lde_change_accept_filter(af);
if (strcmp(af_conf->acl_label_expnull_for, filter_name) == 0)
lde_change_expnull_for_filter(af);
}
void lde_route_update(struct iface *iface, int af)
{
struct fec *f;
struct fec_node *fn;
struct fec_nh *fnh;
struct lde_nbr *ln;
/* update label of non-connected routes */
log_debug("update labels for interface %s", iface->name);
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
if (IS_MPLS_UNRESERVED_LABEL(fn->local_label))
continue;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
break;
default:
/* unspecified so process both address families */
break;
}
LIST_FOREACH(fnh, &fn->nexthops, entry) {
/*
* If connected leave existing label. If LDP
* configured on interface or a static route
* may need new label. If no LDP configured
* treat fec as a connected route
*/
if (CHECK_FLAG(fnh->flags, F_FEC_NH_CONNECTED))
break;
if (fnh->ifindex != iface->ifindex)
continue;
UNSET_FLAG(fnh->flags, F_FEC_NH_NO_LDP);
if (IS_MPLS_RESERVED_LABEL(fn->local_label)) {
fn->local_label = NO_LABEL;
fn->local_label = lde_update_label(fn);
if (fn->local_label != NO_LABEL)
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelmapping(
ln, fn, 0);
}
break;
}
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid,
0, NULL, 0);
}
void lde_route_update_release(struct iface *iface, int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
struct fec_nh *fnh;
/* update label of interfaces no longer running LDP */
log_debug("release all labels for interface %s af %s", iface->name,
af == AF_INET ? "ipv4" : "ipv6");
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
break;
default:
fatalx("lde_route_update_release: unknown af");
}
if (fn->local_label == NO_LABEL)
continue;
LIST_FOREACH(fnh, &fn->nexthops, entry) {
/*
* If connected leave existing label. If LDP
* removed from interface may need new label
* and would be treated as a connected route
*/
if (CHECK_FLAG(fnh->flags, F_FEC_NH_CONNECTED))
break;
if (fnh->ifindex != iface->ifindex)
continue;
SET_FLAG(fnh->flags, F_FEC_NH_NO_LDP);
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelwithdraw(ln, fn, NULL, NULL);
lde_free_label(fn->local_label);
fn->local_label = NO_LABEL;
fn->local_label = lde_update_label(fn);
if (fn->local_label != NO_LABEL)
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelmapping(ln, fn, 0);
break;
}
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid,
0, NULL, 0);
}
void lde_route_update_release_all(int af)
{
struct lde_nbr *ln;
struct fec *f;
struct fec_node *fn;
struct fec_nh *fnh;
/* remove labels from all interfaces as LDP is no longer running for
* this address family
*/
log_debug("release all labels for address family %s",
af == AF_INET ? "ipv4" : "ipv6");
RB_FOREACH(f, fec_tree, &ft) {
fn = (struct fec_node *)f;
switch (af) {
case AF_INET:
if (fn->fec.type != FEC_TYPE_IPV4)
continue;
break;
case AF_INET6:
if (fn->fec.type != FEC_TYPE_IPV6)
continue;
break;
default:
fatalx("lde_route_update_release: unknown af");
}
RB_FOREACH(ln, nbr_tree, &lde_nbrs)
lde_send_labelwithdraw(ln, fn, NULL, NULL);
LIST_FOREACH(fnh, &fn->nexthops, entry) {
SET_FLAG(fnh->flags, F_FEC_NH_NO_LDP);
lde_send_delete_klabel(fn, fnh);
}
}
}
Reference in New Issue View Git Blame Copy Permalink