Adding upstream version 9.1.upstream/9.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1044 insertions, 0 deletions

diff --git a/ldpd/ldpe.c b/ldpd/ldpe.c
new file mode 100644
index 0000000..e66b9e9
--- /dev/null
+++ b/ldpd/ldpe.c
@@ -0,0 +1,1044 @@
+// SPDX-License-Identifier: ISC
+/*	$OpenBSD$ */
+
+/*
+ * Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org>
+ * Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
+ * Copyright (c) 2004, 2008 Esben Norby <norby@openbsd.org>
+ * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
+ */
+
+#include <zebra.h>
+
+#include "ldpd.h"
+#include "ldpe.h"
+#include "lde.h"
+#include "control.h"
+#include "log.h"
+#include "ldp_debug.h"
+#include "rlfa.h"
+
+#include <lib/log.h>
+#include "memory.h"
+#include "privs.h"
+#include "sigevent.h"
+#include "libfrr.h"
+
+static void	 ldpe_shutdown(void);
+static void ldpe_dispatch_main(struct event *thread);
+static void ldpe_dispatch_lde(struct event *thread);
+#ifdef __OpenBSD__
+static void ldpe_dispatch_pfkey(struct event *thread);
+#endif
+static void	 ldpe_setup_sockets(int, int, int, int);
+static void	 ldpe_close_sockets(int);
+static void	 ldpe_iface_af_ctl(struct ctl_conn *c, int af, ifindex_t ifidx);
+static void	 ldpe_check_filter_af(int, struct ldpd_af_conf *, const char *);
+
+struct ldpd_conf	*leconf;
+#ifdef __OpenBSD__
+struct ldpd_sysdep	 sysdep;
+#endif
+
+static struct imsgev    iev_main_data;
+static struct imsgev	*iev_main, *iev_main_sync;
+static struct imsgev	*iev_lde;
+#ifdef __OpenBSD__
+static struct event *pfkey_ev;
+#endif
+
+/* ldpe privileges */
+static zebra_capabilities_t _caps_p [] =
+{
+	ZCAP_BIND,
+	ZCAP_NET_ADMIN
+};
+
+struct zebra_privs_t ldpe_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
+};
+
+/* SIGINT / SIGTERM handler. */
+static void
+sigint(void)
+{
+	ldpe_shutdown();
+}
+
+static struct frr_signal_t ldpe_signals[] =
+{
+	{
+		.signal = SIGHUP,
+		/* ignore */
+	},
+	{
+		.signal = SIGINT,
+		.handler = &sigint,
+	},
+	{
+		.signal = SIGTERM,
+		.handler = &sigint,
+	},
+};
+
+char *pkt_ptr; /* packet buffer */
+
+/* label distribution protocol engine */
+void
+ldpe(void)
+{
+#ifdef HAVE_SETPROCTITLE
+	setproctitle("ldp engine");
+#endif
+	ldpd_process = PROC_LDP_ENGINE;
+	log_procname = log_procnames[ldpd_process];
+
+	master = frr_init();
+	/* no frr_config_fork() here, allow frr_pthread to create threads */
+	frr_is_after_fork = true;
+
+	/* setup signal handler */
+	signal_init(master, array_size(ldpe_signals), ldpe_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 = ldpe_dispatch_main;
+	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_data, 0, sizeof(iev_main_data));
+	iev_main_sync = &iev_main_data;
+	imsg_init(&iev_main_sync->ibuf, LDPD_FD_SYNC);
+
+	/* create base configuration */
+	leconf = config_new_empty();
+
+	struct event thread;
+	while (event_fetch(master, &thread))
+		event_call(&thread);
+
+	/* NOTREACHED */
+	return;
+}
+
+void
+ldpe_init(struct ldpd_init *init)
+{
+#ifdef __OpenBSD__
+	/* This socket must be open before dropping privileges. */
+	global.pfkeysock = pfkey_init();
+	if (sysdep.no_pfkey == 0) {
+		event_add_read(master, ldpe_dispatch_pfkey, NULL,
+			       global.pfkeysock, &pfkey_ev);
+	}
+#endif
+
+	/* drop privileges */
+	ldpe_privs.user = init->user;
+	ldpe_privs.group = init->group;
+	zprivs_preinit(&ldpe_privs);
+	zprivs_init(&ldpe_privs);
+
+	/* listen on ldpd control socket */
+	strlcpy(ctl_sock_path, init->ctl_sock_path, sizeof(ctl_sock_path));
+	if (control_init(ctl_sock_path) == -1)
+		fatalx("control socket setup failed");
+	TAILQ_INIT(&ctl_conns);
+	control_listen();
+
+	LIST_INIT(&global.addr_list);
+	RB_INIT(global_adj_head, &global.adj_tree);
+	TAILQ_INIT(&global.pending_conns);
+	if (inet_pton(AF_INET, AllRouters_v4, &global.mcast_addr_v4) != 1)
+		fatal("inet_pton");
+	if (inet_pton(AF_INET6, AllRouters_v6, &global.mcast_addr_v6) != 1)
+		fatal("inet_pton");
+
+	/* mark sockets as closed */
+	global.ipv4.ldp_disc_socket = -1;
+	global.ipv4.ldp_edisc_socket = -1;
+	global.ipv4.ldp_session_socket = -1;
+	global.ipv6.ldp_disc_socket = -1;
+	global.ipv6.ldp_edisc_socket = -1;
+	global.ipv6.ldp_session_socket = -1;
+
+	if ((pkt_ptr = calloc(1, IBUF_READ_SIZE)) == NULL)
+		fatal(__func__);
+
+	accept_init();
+}
+
+static void
+ldpe_shutdown(void)
+{
+	struct if_addr		*if_addr;
+	struct adj		*adj;
+
+	/* close pipes */
+	if (iev_lde) {
+		msgbuf_clear(&iev_lde->ibuf.w);
+		close(iev_lde->ibuf.fd);
+		iev_lde->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;
+
+	control_cleanup(ctl_sock_path);
+
+#ifdef __OpenBSD__
+	if (sysdep.no_pfkey == 0) {
+		EVENT_OFF(pfkey_ev);
+		close(global.pfkeysock);
+	}
+#endif
+	ldpe_close_sockets(AF_INET);
+	ldpe_close_sockets(AF_INET6);
+
+	/* remove addresses from global list */
+	while ((if_addr = LIST_FIRST(&global.addr_list)) != NULL) {
+		LIST_REMOVE(if_addr, entry);
+		assert(if_addr != LIST_FIRST(&global.addr_list));
+		free(if_addr);
+	}
+	while (!RB_EMPTY(global_adj_head, &global.adj_tree)) {
+		adj = RB_ROOT(global_adj_head, &global.adj_tree);
+
+		adj_del(adj, S_SHUTDOWN);
+	}
+
+	config_clear(leconf);
+	/* clean up */
+	if (iev_lde)
+		free(iev_lde);
+	free(iev_main);
+	free(pkt_ptr);
+
+	log_info("ldp engine exiting");
+
+	zlog_fini();
+
+	exit(0);
+}
+
+/* imesg */
+int
+ldpe_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
+ldpe_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
+ldpe_imsg_compose_lde(int type, uint32_t peerid, pid_t pid, void *data,
+    uint16_t datalen)
+{
+	if (iev_lde->ibuf.fd == -1)
+		return (0);
+	return (imsg_compose_event(iev_lde, type, peerid, pid, -1, data, datalen));
+}
+
+/* ARGSUSED */
+static void ldpe_dispatch_main(struct event *thread)
+{
+	static struct ldpd_conf	*nconf;
+	struct 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;
+	int			 fd;
+	struct imsgev *iev = EVENT_ARG(thread);
+	struct imsgbuf		*ibuf = &iev->ibuf;
+	struct iface		*iface = NULL;
+	struct kif		*kif;
+	int			 af;
+	enum socket_type	*socket_type;
+	static int		 disc_socket = -1;
+	static int		 edisc_socket = -1;
+	static int		 session_socket = -1;
+	struct nbr		*nbr;
+#ifdef __OpenBSD__
+	struct nbr_params	*nbrp;
+#endif
+	int			 n, shut = 0;
+	struct ldp_access       *laccess;
+	struct ldp_igp_sync_if_state_req *ldp_sync_if_state_req;
+	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("ldpe_dispatch_main: 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(leconf, kif->ifname);
+			if (iface) {
+				if_update_info(iface, kif);
+				ldp_if_update(iface, AF_UNSPEC);
+				break;
+			}
+
+			RB_FOREACH(l2vpn, l2vpn_head, &leconf->l2vpn_tree) {
+				lif = l2vpn_if_find(l2vpn, kif->ifname);
+				if (lif) {
+					l2vpn_if_update_info(lif, kif);
+					l2vpn_if_update(lif);
+					break;
+				}
+				pw = l2vpn_pw_find(l2vpn, kif->ifname);
+				if (pw) {
+					l2vpn_pw_update_info(pw, kif);
+					break;
+				}
+			}
+			break;
+		case IMSG_NEWADDR:
+			if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct kaddr))
+				fatalx("NEWADDR imsg with wrong len");
+
+			if_addr_add(imsg.data);
+			break;
+		case IMSG_DELADDR:
+			if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(struct kaddr))
+				fatalx("DELADDR imsg with wrong len");
+
+			if_addr_del(imsg.data);
+			break;
+		case IMSG_SOCKET_IPC:
+			if (iev_lde) {
+				log_warnx("%s: received unexpected imsg fd to lde", __func__);
+				break;
+			}
+			if ((fd = imsg.fd) == -1) {
+				log_warnx("%s: expected to receive imsg fd to lde but didn't receive any", __func__);
+				break;
+			}
+
+			if ((iev_lde = malloc(sizeof(struct imsgev))) == NULL)
+				fatal(NULL);
+			imsg_init(&iev_lde->ibuf, fd);
+			iev_lde->handler_read = ldpe_dispatch_lde;
+			event_add_read(master, iev_lde->handler_read, iev_lde,
+				       iev_lde->ibuf.fd, &iev_lde->ev_read);
+			iev_lde->handler_write = ldp_write_handler;
+			iev_lde->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));
+			ldpe_init(&init);
+			break;
+		case IMSG_AGENTX_ENABLED:
+			ldp_agentx_enabled();
+			break;
+		case IMSG_CLOSE_SOCKETS:
+			af = imsg.hdr.peerid;
+
+			RB_FOREACH(nbr, nbr_id_head, &nbrs_by_id) {
+				if (nbr->af != af)
+					continue;
+				session_shutdown(nbr, S_SHUTDOWN, 0, 0);
+#ifdef __OpenBSD__
+				pfkey_remove(nbr);
+#endif
+				nbr->auth.method = AUTH_NONE;
+			}
+			ldpe_close_sockets(af);
+			if_update_all(af);
+			tnbr_update_all(af);
+
+			disc_socket = -1;
+			edisc_socket = -1;
+			session_socket = -1;
+			if (CHECK_FLAG((ldp_af_conf_get(leconf, af))->flags, F_LDPD_AF_ENABLED))
+				ldpe_imsg_compose_parent(IMSG_REQUEST_SOCKETS, af, NULL, 0);
+			break;
+		case IMSG_SOCKET_NET:
+			if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(enum socket_type))
+				fatalx("SOCKET_NET imsg with wrong len");
+			socket_type = imsg.data;
+
+			switch (*socket_type) {
+			case LDP_SOCKET_DISC:
+				disc_socket = imsg.fd;
+				break;
+			case LDP_SOCKET_EDISC:
+				edisc_socket = imsg.fd;
+				break;
+			case LDP_SOCKET_SESSION:
+				session_socket = imsg.fd;
+				break;
+			}
+			break;
+		case IMSG_SETUP_SOCKETS:
+			af = imsg.hdr.peerid;
+			if (disc_socket == -1 || edisc_socket == -1 ||
+			    session_socket == -1) {
+				if (disc_socket != -1)
+					close(disc_socket);
+				if (edisc_socket != -1)
+					close(edisc_socket);
+				if (session_socket != -1)
+					close(session_socket);
+				break;
+			}
+
+			ldpe_setup_sockets(af, disc_socket, edisc_socket, session_socket);
+			if_update_all(af);
+			tnbr_update_all(af);
+			RB_FOREACH(nbr, nbr_id_head, &nbrs_by_id) {
+				if (nbr->af != af)
+					continue;
+				nbr->laddr = (ldp_af_conf_get(leconf, af))->trans_addr;
+#ifdef __OpenBSD__
+				nbrp = nbr_params_find(leconf, nbr->id);
+				if (nbrp) {
+					nbr->auth.method = nbrp->auth.method;
+					if (pfkey_establish(nbr, nbrp) == -1)
+						fatalx("pfkey setup failed");
+				}
+#endif
+				if (nbr_session_active_role(nbr))
+					nbr_establish_connection(nbr);
+			}
+			break;
+		case IMSG_RTRID_UPDATE:
+			memcpy(&global.rtr_id, imsg.data, sizeof(global.rtr_id));
+			if (leconf->rtr_id.s_addr == INADDR_ANY) {
+				ldpe_reset_nbrs(AF_UNSPEC);
+			}
+			if_update_all(AF_UNSPEC);
+			tnbr_update_all(AF_UNSPEC);
+			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(leconf, nconf);
+			ldp_clear_config(nconf);
+			nconf = NULL;
+			global.conf_seqnum++;
+			break;
+		case IMSG_CTL_END:
+			control_imsg_relay(&imsg);
+			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;
+			ldpe_check_filter_af(AF_INET, &leconf->ipv4, laccess->name);
+			ldpe_check_filter_af(AF_INET6, &leconf->ipv6, laccess->name);
+			break;
+		case IMSG_LDP_SYNC_IF_STATE_REQUEST:
+			if (imsg.hdr.len != IMSG_HEADER_SIZE +
+			    sizeof(struct ldp_igp_sync_if_state_req)) {
+				log_warnx("%s: wrong imsg len", __func__);
+				break;
+			}
+			ldp_sync_if_state_req = imsg.data;
+			ldp_sync_fsm_state_req(ldp_sync_if_state_req);
+			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);
+			ldpe_rlfa_init(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;
+
+				ldpe_rlfa_exit(rclient);
+				rlfa_client_del(rclient);
+			}
+			break;
+		default:
+			log_debug("%s: error handling 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);
+		ldpe_shutdown();
+	}
+}
+
+/* ARGSUSED */
+static void ldpe_dispatch_lde(struct event *thread)
+{
+	struct imsgev *iev = EVENT_ARG(thread);
+	struct imsgbuf		*ibuf = &iev->ibuf;
+	struct imsg		 imsg;
+	struct map		*map;
+	struct notify_msg	*nm;
+	struct nbr		*nbr;
+	int			 n, 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("ldpe_dispatch_lde: imsg_get error");
+		if (n == 0)
+			break;
+
+		switch (imsg.hdr.type) {
+		case IMSG_MAPPING_ADD:
+		case IMSG_RELEASE_ADD:
+		case IMSG_REQUEST_ADD:
+		case IMSG_WITHDRAW_ADD:
+			if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct map))
+				fatalx("invalid size of map request");
+			map = imsg.data;
+
+			nbr = nbr_find_peerid(imsg.hdr.peerid);
+			if (nbr == NULL)
+				break;
+			if (nbr->state != NBR_STA_OPER)
+				break;
+
+			switch (imsg.hdr.type) {
+			case IMSG_MAPPING_ADD:
+				mapping_list_add(&nbr->mapping_list, map);
+				break;
+			case IMSG_RELEASE_ADD:
+				mapping_list_add(&nbr->release_list, map);
+				break;
+			case IMSG_REQUEST_ADD:
+				mapping_list_add(&nbr->request_list, map);
+				break;
+			case IMSG_WITHDRAW_ADD:
+				mapping_list_add(&nbr->withdraw_list, map);
+				break;
+			}
+			break;
+		case IMSG_MAPPING_ADD_END:
+		case IMSG_RELEASE_ADD_END:
+		case IMSG_REQUEST_ADD_END:
+		case IMSG_WITHDRAW_ADD_END:
+			nbr = nbr_find_peerid(imsg.hdr.peerid);
+			if (nbr == NULL)
+				break;
+			if (nbr->state != NBR_STA_OPER)
+				break;
+
+			switch (imsg.hdr.type) {
+			case IMSG_MAPPING_ADD_END:
+				send_labelmessage(nbr, MSG_TYPE_LABELMAPPING,
+				    &nbr->mapping_list);
+				break;
+			case IMSG_RELEASE_ADD_END:
+				send_labelmessage(nbr, MSG_TYPE_LABELRELEASE,
+				    &nbr->release_list);
+				break;
+			case IMSG_REQUEST_ADD_END:
+				send_labelmessage(nbr, MSG_TYPE_LABELREQUEST,
+				    &nbr->request_list);
+				break;
+			case IMSG_WITHDRAW_ADD_END:
+				send_labelmessage(nbr, MSG_TYPE_LABELWITHDRAW,
+				    &nbr->withdraw_list);
+				break;
+			}
+			break;
+		case IMSG_NOTIFICATION_SEND:
+			if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(struct notify_msg))
+				fatalx("invalid size of OE request");
+			nm = imsg.data;
+
+			nbr = nbr_find_peerid(imsg.hdr.peerid);
+			if (nbr == NULL) {
+				log_debug("%s: cannot find neighbor", __func__);
+				break;
+			}
+			if (nbr->state != NBR_STA_OPER)
+				break;
+
+			send_notification_full(nbr->tcp, nm);
+			break;
+		case IMSG_CTL_END:
+		case IMSG_CTL_SHOW_LIB_BEGIN:
+		case IMSG_CTL_SHOW_LIB_RCVD:
+		case IMSG_CTL_SHOW_LIB_SENT:
+		case IMSG_CTL_SHOW_LIB_END:
+		case IMSG_CTL_SHOW_L2VPN_PW:
+		case IMSG_CTL_SHOW_L2VPN_BINDING:
+			control_imsg_relay(&imsg);
+			break;
+		case IMSG_NBR_SHUTDOWN:
+			nbr = nbr_find_peerid(imsg.hdr.peerid);
+			if (nbr == NULL) {
+				log_debug("%s: cannot find neighbor", __func__);
+				break;
+			}
+			if (nbr->state != NBR_STA_OPER)
+				break;
+			session_shutdown(nbr,S_SHUTDOWN,0,0);
+			break;
+		default:
+			log_debug("%s: error handling 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);
+		ldpe_shutdown();
+	}
+}
+
+#ifdef __OpenBSD__
+/* ARGSUSED */
+static void ldpe_dispatch_pfkey(struct event *thread)
+{
+	int fd = EVENT_FD(thread);
+
+	event_add_read(master, ldpe_dispatch_pfkey, NULL, global.pfkeysock,
+		       &pfkey_ev);
+
+	if (pfkey_read(fd, NULL) == -1)
+		fatal("pfkey_read failed, exiting...");
+}
+#endif /* __OpenBSD__ */
+
+static void
+ldpe_setup_sockets(int af, int disc_socket, int edisc_socket,
+    int session_socket)
+{
+	struct ldpd_af_global	*af_global;
+
+	af_global = ldp_af_global_get(&global, af);
+
+	/* discovery socket */
+	af_global->ldp_disc_socket = disc_socket;
+	event_add_read(master, disc_recv_packet, &af_global->disc_ev,
+		       af_global->ldp_disc_socket, &af_global->disc_ev);
+
+	/* extended discovery socket */
+	af_global->ldp_edisc_socket = edisc_socket;
+	event_add_read(master, disc_recv_packet, &af_global->edisc_ev,
+		       af_global->ldp_edisc_socket, &af_global->edisc_ev);
+
+	/* session socket */
+	af_global->ldp_session_socket = session_socket;
+	accept_add(af_global->ldp_session_socket, session_accept, NULL);
+}
+
+static void
+ldpe_close_sockets(int af)
+{
+	struct ldpd_af_global	*af_global;
+
+	af_global = ldp_af_global_get(&global, af);
+
+	/* discovery socket */
+	EVENT_OFF(af_global->disc_ev);
+	if (af_global->ldp_disc_socket != -1) {
+		close(af_global->ldp_disc_socket);
+		af_global->ldp_disc_socket = -1;
+	}
+
+	/* extended discovery socket */
+	EVENT_OFF(af_global->edisc_ev);
+	if (af_global->ldp_edisc_socket != -1) {
+		close(af_global->ldp_edisc_socket);
+		af_global->ldp_edisc_socket = -1;
+	}
+
+	/* session socket */
+	if (af_global->ldp_session_socket != -1) {
+		accept_del(af_global->ldp_session_socket);
+		close(af_global->ldp_session_socket);
+		af_global->ldp_session_socket = -1;
+	}
+}
+
+int
+ldpe_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);
+}
+
+void
+ldpe_reset_nbrs(int af)
+{
+	struct nbr		*nbr;
+
+	RB_FOREACH(nbr, nbr_id_head, &nbrs_by_id) {
+		if (af == AF_UNSPEC || nbr->af == af)
+			session_shutdown(nbr, S_SHUTDOWN, 0, 0);
+	}
+}
+
+void
+ldpe_reset_ds_nbrs(void)
+{
+	struct nbr		*nbr;
+
+	RB_FOREACH(nbr, nbr_id_head, &nbrs_by_id) {
+		if (nbr->ds_tlv)
+			session_shutdown(nbr, S_SHUTDOWN, 0, 0);
+	}
+}
+
+void
+ldpe_remove_dynamic_tnbrs(int af)
+{
+	struct tnbr		*tnbr, *safe;
+
+	RB_FOREACH_SAFE(tnbr, tnbr_head, &leconf->tnbr_tree, safe) {
+		if (tnbr->af != af)
+			continue;
+
+		UNSET_FLAG(tnbr->flags, F_TNBR_DYNAMIC);
+		tnbr_check(leconf, tnbr);
+	}
+}
+
+void
+ldpe_stop_init_backoff(int af)
+{
+	struct nbr		*nbr;
+
+	RB_FOREACH(nbr, nbr_id_head, &nbrs_by_id) {
+		if (nbr->af == af && nbr_pending_idtimer(nbr)) {
+			nbr_stop_idtimer(nbr);
+			nbr_establish_connection(nbr);
+		}
+	}
+}
+
+static void
+ldpe_iface_af_ctl(struct ctl_conn *c, int af, ifindex_t idx)
+{
+	struct iface		*iface;
+	struct iface_af		*ia;
+	struct ctl_iface	*ictl;
+
+	RB_FOREACH(iface, iface_head, &leconf->iface_tree) {
+		if (idx == 0 || idx == iface->ifindex) {
+			ia = iface_af_get(iface, af);
+			if (!ia->enabled)
+				continue;
+
+			ictl = if_to_ctl(ia);
+			imsg_compose_event(&c->iev, IMSG_CTL_SHOW_INTERFACE,
+			    0, 0, -1, ictl, sizeof(struct ctl_iface));
+		}
+	}
+}
+
+void
+ldpe_iface_ctl(struct ctl_conn *c, ifindex_t idx)
+{
+	ldpe_iface_af_ctl(c, AF_INET, idx);
+	ldpe_iface_af_ctl(c, AF_INET6, idx);
+}
+
+void
+ldpe_adj_ctl(struct ctl_conn *c)
+{
+	struct adj	*adj;
+	struct ctl_adj	*actl;
+
+	RB_FOREACH(adj, global_adj_head, &global.adj_tree) {
+		actl = adj_to_ctl(adj);
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISCOVERY, 0, 0,
+		    -1, actl, sizeof(struct ctl_adj));
+	}
+
+	imsg_compose_event(&c->iev, IMSG_CTL_END, 0, 0, -1, NULL, 0);
+}
+
+void
+ldpe_adj_detail_ctl(struct ctl_conn *c)
+{
+	struct iface		*iface;
+	struct tnbr		*tnbr;
+	struct adj		*adj;
+	struct ctl_adj		*actl;
+	struct ctl_disc_if	 ictl;
+	struct ctl_disc_tnbr	 tctl;
+
+	imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISCOVERY, 0, 0, -1, NULL, 0);
+
+	RB_FOREACH(iface, iface_head, &leconf->iface_tree) {
+		memset(&ictl, 0, sizeof(ictl));
+		ictl.active_v4 = (iface->ipv4.state == IF_STA_ACTIVE);
+		ictl.active_v6 = (iface->ipv6.state == IF_STA_ACTIVE);
+
+		if (!ictl.active_v4 && !ictl.active_v6)
+			continue;
+
+		strlcpy(ictl.name, iface->name, sizeof(ictl.name));
+		if (RB_EMPTY(ia_adj_head, &iface->ipv4.adj_tree) &&
+		    RB_EMPTY(ia_adj_head, &iface->ipv6.adj_tree))
+			ictl.no_adj = 1;
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISC_IFACE, 0, 0,
+		    -1, &ictl, sizeof(ictl));
+
+		RB_FOREACH(adj, ia_adj_head, &iface->ipv4.adj_tree) {
+			actl = adj_to_ctl(adj);
+			imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISC_ADJ,
+			    0, 0, -1, actl, sizeof(struct ctl_adj));
+		}
+		RB_FOREACH(adj, ia_adj_head, &iface->ipv6.adj_tree) {
+			actl = adj_to_ctl(adj);
+			imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISC_ADJ,
+			    0, 0, -1, actl, sizeof(struct ctl_adj));
+		}
+	}
+
+	RB_FOREACH(tnbr, tnbr_head, &leconf->tnbr_tree) {
+		memset(&tctl, 0, sizeof(tctl));
+		tctl.af = tnbr->af;
+		tctl.addr = tnbr->addr;
+		if (tnbr->adj == NULL)
+			tctl.no_adj = 1;
+
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISC_TNBR, 0, 0,
+		    -1, &tctl, sizeof(tctl));
+
+		if (tnbr->adj == NULL)
+			continue;
+
+		actl = adj_to_ctl(tnbr->adj);
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_DISC_ADJ, 0, 0,
+		    -1, actl, sizeof(struct ctl_adj));
+	}
+
+	imsg_compose_event(&c->iev, IMSG_CTL_END, 0, 0, -1, NULL, 0);
+}
+
+void
+ldpe_nbr_ctl(struct ctl_conn *c)
+{
+	struct adj	*adj;
+	struct ctl_adj	*actl;
+	struct nbr	*nbr;
+	struct ctl_nbr	*nctl;
+
+	RB_FOREACH(nbr, nbr_addr_head, &nbrs_by_addr) {
+		if (nbr->state == NBR_STA_PRESENT)
+			continue;
+
+		nctl = nbr_to_ctl(nbr);
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_NBR, 0, 0, -1, nctl,
+		    sizeof(struct ctl_nbr));
+
+		RB_FOREACH(adj, nbr_adj_head, &nbr->adj_tree) {
+			actl = adj_to_ctl(adj);
+			imsg_compose_event(&c->iev, IMSG_CTL_SHOW_NBR_DISC,
+			    0, 0, -1, actl, sizeof(struct ctl_adj));
+		}
+
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_NBR_END, 0, 0, -1,
+		    NULL, 0);
+	}
+	imsg_compose_event(&c->iev, IMSG_CTL_END, 0, 0, -1, NULL, 0);
+}
+
+void
+ldpe_ldp_sync_ctl(struct ctl_conn *c)
+{
+	struct iface		*iface;
+	struct ctl_ldp_sync	*ictl;
+
+	RB_FOREACH(iface, iface_head, &leconf->iface_tree) {
+		ictl = ldp_sync_to_ctl(iface);
+		imsg_compose_event(&c->iev, IMSG_CTL_SHOW_LDP_SYNC,
+			0, 0, -1, ictl, sizeof(struct ctl_ldp_sync));
+	}
+	imsg_compose_event(&c->iev, IMSG_CTL_END, 0, 0, -1, NULL, 0);
+}
+
+void
+mapping_list_add(struct mapping_head *mh, struct map *map)
+{
+	struct mapping_entry	*me;
+
+	me = calloc(1, sizeof(*me));
+	if (me == NULL)
+		fatal(__func__);
+	me->map = *map;
+
+	TAILQ_INSERT_TAIL(mh, me, entry);
+}
+
+void
+mapping_list_clr(struct mapping_head *mh)
+{
+	struct mapping_entry	*me;
+
+	while ((me = TAILQ_FIRST(mh)) != NULL) {
+		TAILQ_REMOVE(mh, me, entry);
+		assert(me != TAILQ_FIRST(mh));
+		free(me);
+	}
+}
+
+void
+ldpe_check_filter_af(int af, struct ldpd_af_conf *af_conf,
+    const char *filter_name)
+{
+	if (strcmp(af_conf->acl_thello_accept_from, filter_name) == 0)
+		ldpe_remove_dynamic_tnbrs(af);
+}
+
+void
+ldpe_set_config_change_time(void)
+{
+	/* SNMP update time when ever there is a config change */
+	leconf->config_change_time = time(NULL);
+}