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-rw-r--r--bgpd/bgp_bmp.c2574
1 files changed, 2574 insertions, 0 deletions
diff --git a/bgpd/bgp_bmp.c b/bgpd/bgp_bmp.c
new file mode 100644
index 0000000..7270802
--- /dev/null
+++ b/bgpd/bgp_bmp.c
@@ -0,0 +1,2574 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* BMP support.
+ * Copyright (C) 2018 Yasuhiro Ohara
+ * Copyright (C) 2019 David Lamparter for NetDEF, Inc.
+ */
+
+#include <zebra.h>
+
+#include "log.h"
+#include "stream.h"
+#include "sockunion.h"
+#include "command.h"
+#include "prefix.h"
+#include "frrevent.h"
+#include "linklist.h"
+#include "queue.h"
+#include "pullwr.h"
+#include "memory.h"
+#include "network.h"
+#include "filter.h"
+#include "lib_errors.h"
+#include "stream.h"
+#include "libfrr.h"
+#include "lib/version.h"
+#include "jhash.h"
+#include "termtable.h"
+
+#include "bgpd/bgp_table.h"
+#include "bgpd/bgpd.h"
+#include "bgpd/bgp_route.h"
+#include "bgpd/bgp_attr.h"
+#include "bgpd/bgp_dump.h"
+#include "bgpd/bgp_errors.h"
+#include "bgpd/bgp_packet.h"
+#include "bgpd/bgp_bmp.h"
+#include "bgpd/bgp_fsm.h"
+#include "bgpd/bgp_updgrp.h"
+#include "bgpd/bgp_vty.h"
+#include "bgpd/bgp_trace.h"
+#include "bgpd/bgp_network.h"
+
+static void bmp_close(struct bmp *bmp);
+static struct bmp_bgp *bmp_bgp_find(struct bgp *bgp);
+static void bmp_targets_put(struct bmp_targets *bt);
+static struct bmp_bgp_peer *bmp_bgp_peer_find(uint64_t peerid);
+static struct bmp_bgp_peer *bmp_bgp_peer_get(struct peer *peer);
+static void bmp_active_disconnected(struct bmp_active *ba);
+static void bmp_active_put(struct bmp_active *ba);
+
+DEFINE_MGROUP(BMP, "BMP (BGP Monitoring Protocol)");
+
+DEFINE_MTYPE_STATIC(BMP, BMP_CONN, "BMP connection state");
+DEFINE_MTYPE_STATIC(BMP, BMP_TARGETS, "BMP targets");
+DEFINE_MTYPE_STATIC(BMP, BMP_TARGETSNAME, "BMP targets name");
+DEFINE_MTYPE_STATIC(BMP, BMP_LISTENER, "BMP listener");
+DEFINE_MTYPE_STATIC(BMP, BMP_ACTIVE, "BMP active connection config");
+DEFINE_MTYPE_STATIC(BMP, BMP_ACLNAME, "BMP access-list name");
+DEFINE_MTYPE_STATIC(BMP, BMP_QUEUE, "BMP update queue item");
+DEFINE_MTYPE_STATIC(BMP, BMP, "BMP instance state");
+DEFINE_MTYPE_STATIC(BMP, BMP_MIRRORQ, "BMP route mirroring buffer");
+DEFINE_MTYPE_STATIC(BMP, BMP_PEER, "BMP per BGP peer data");
+DEFINE_MTYPE_STATIC(BMP, BMP_OPEN, "BMP stored BGP OPEN message");
+
+DEFINE_QOBJ_TYPE(bmp_targets);
+
+static int bmp_bgp_cmp(const struct bmp_bgp *a, const struct bmp_bgp *b)
+{
+ if (a->bgp < b->bgp)
+ return -1;
+ if (a->bgp > b->bgp)
+ return 1;
+ return 0;
+}
+
+static uint32_t bmp_bgp_hash(const struct bmp_bgp *e)
+{
+ return jhash(&e->bgp, sizeof(e->bgp), 0x55aa5a5a);
+}
+
+DECLARE_HASH(bmp_bgph, struct bmp_bgp, bbi, bmp_bgp_cmp, bmp_bgp_hash);
+
+struct bmp_bgph_head bmp_bgph;
+
+static int bmp_bgp_peer_cmp(const struct bmp_bgp_peer *a,
+ const struct bmp_bgp_peer *b)
+{
+ if (a->peerid < b->peerid)
+ return -1;
+ if (a->peerid > b->peerid)
+ return 1;
+ return 0;
+}
+
+static uint32_t bmp_bgp_peer_hash(const struct bmp_bgp_peer *e)
+{
+ return e->peerid;
+}
+
+DECLARE_HASH(bmp_peerh, struct bmp_bgp_peer, bpi,
+ bmp_bgp_peer_cmp, bmp_bgp_peer_hash);
+
+struct bmp_peerh_head bmp_peerh;
+
+DECLARE_LIST(bmp_mirrorq, struct bmp_mirrorq, bmi);
+
+/* listener management */
+
+static int bmp_listener_cmp(const struct bmp_listener *a,
+ const struct bmp_listener *b)
+{
+ int c;
+
+ c = sockunion_cmp(&a->addr, &b->addr);
+ if (c)
+ return c;
+ if (a->port < b->port)
+ return -1;
+ if (a->port > b->port)
+ return 1;
+ return 0;
+}
+
+DECLARE_SORTLIST_UNIQ(bmp_listeners, struct bmp_listener, bli,
+ bmp_listener_cmp);
+
+static void bmp_listener_put(struct bmp_listener *bl)
+{
+ bmp_listeners_del(&bl->targets->listeners, bl);
+ XFREE(MTYPE_BMP_LISTENER, bl);
+}
+
+static int bmp_targets_cmp(const struct bmp_targets *a,
+ const struct bmp_targets *b)
+{
+ return strcmp(a->name, b->name);
+}
+
+DECLARE_SORTLIST_UNIQ(bmp_targets, struct bmp_targets, bti, bmp_targets_cmp);
+
+DECLARE_LIST(bmp_session, struct bmp, bsi);
+
+DECLARE_DLIST(bmp_qlist, struct bmp_queue_entry, bli);
+
+static int bmp_qhash_cmp(const struct bmp_queue_entry *a,
+ const struct bmp_queue_entry *b)
+{
+ int ret;
+ if (a->afi == AFI_L2VPN && a->safi == SAFI_EVPN && b->afi == AFI_L2VPN
+ && b->safi == SAFI_EVPN) {
+ ret = prefix_cmp(&a->rd, &b->rd);
+ if (ret)
+ return ret;
+ } else if (a->afi == AFI_L2VPN && a->safi == SAFI_EVPN)
+ return 1;
+ else if (b->afi == AFI_L2VPN && b->safi == SAFI_EVPN)
+ return -1;
+
+ if (a->afi == b->afi && a->safi == SAFI_MPLS_VPN &&
+ b->safi == SAFI_MPLS_VPN) {
+ ret = prefix_cmp(&a->rd, &b->rd);
+ if (ret)
+ return ret;
+ } else if (a->safi == SAFI_MPLS_VPN)
+ return 1;
+ else if (b->safi == SAFI_MPLS_VPN)
+ return -1;
+
+ ret = prefix_cmp(&a->p, &b->p);
+ if (ret)
+ return ret;
+ ret = memcmp(&a->peerid, &b->peerid,
+ offsetof(struct bmp_queue_entry, refcount) -
+ offsetof(struct bmp_queue_entry, peerid));
+ return ret;
+}
+
+static uint32_t bmp_qhash_hkey(const struct bmp_queue_entry *e)
+{
+ uint32_t key;
+
+ key = prefix_hash_key((void *)&e->p);
+ key = jhash(&e->peerid,
+ offsetof(struct bmp_queue_entry, refcount)
+ - offsetof(struct bmp_queue_entry, peerid),
+ key);
+ if ((e->afi == AFI_L2VPN && e->safi == SAFI_EVPN) ||
+ (e->safi == SAFI_MPLS_VPN))
+ key = jhash(&e->rd,
+ offsetof(struct bmp_queue_entry, rd)
+ - offsetof(struct bmp_queue_entry, refcount)
+ + PSIZE(e->rd.prefixlen),
+ key);
+
+ return key;
+}
+
+DECLARE_HASH(bmp_qhash, struct bmp_queue_entry, bhi,
+ bmp_qhash_cmp, bmp_qhash_hkey);
+
+static int bmp_active_cmp(const struct bmp_active *a,
+ const struct bmp_active *b)
+{
+ int c;
+
+ c = strcmp(a->hostname, b->hostname);
+ if (c)
+ return c;
+ if (a->port < b->port)
+ return -1;
+ if (a->port > b->port)
+ return 1;
+ return 0;
+}
+
+DECLARE_SORTLIST_UNIQ(bmp_actives, struct bmp_active, bai, bmp_active_cmp);
+
+static struct bmp *bmp_new(struct bmp_targets *bt, int bmp_sock)
+{
+ struct bmp *new = XCALLOC(MTYPE_BMP_CONN, sizeof(struct bmp));
+ afi_t afi;
+ safi_t safi;
+
+ monotime(&new->t_up);
+ new->targets = bt;
+ new->socket = bmp_sock;
+ new->syncafi = AFI_MAX;
+
+ FOREACH_AFI_SAFI (afi, safi) {
+ new->afistate[afi][safi] = bt->afimon[afi][safi]
+ ? BMP_AFI_NEEDSYNC : BMP_AFI_INACTIVE;
+ }
+
+ bmp_session_add_tail(&bt->sessions, new);
+ return new;
+}
+
+static void bmp_free(struct bmp *bmp)
+{
+ bmp_session_del(&bmp->targets->sessions, bmp);
+ XFREE(MTYPE_BMP_CONN, bmp);
+}
+
+static void bmp_common_hdr(struct stream *s, uint8_t ver, uint8_t type)
+{
+ stream_putc(s, ver);
+ stream_putl(s, 0); //dummy message length. will be set later.
+ stream_putc(s, type);
+}
+
+static void bmp_per_peer_hdr(struct stream *s, struct peer *peer,
+ uint8_t flags, const struct timeval *tv)
+{
+ char peer_distinguisher[8];
+
+#define BMP_PEER_TYPE_GLOBAL_INSTANCE 0
+#define BMP_PEER_TYPE_RD_INSTANCE 1
+#define BMP_PEER_TYPE_LOCAL_INSTANCE 2
+
+#define BMP_PEER_FLAG_V (1 << 7)
+#define BMP_PEER_FLAG_L (1 << 6)
+#define BMP_PEER_FLAG_A (1 << 5)
+
+ /* Peer Type */
+ stream_putc(s, BMP_PEER_TYPE_GLOBAL_INSTANCE);
+
+ /* Peer Flags */
+ if (peer->connection->su.sa.sa_family == AF_INET6)
+ SET_FLAG(flags, BMP_PEER_FLAG_V);
+ else
+ UNSET_FLAG(flags, BMP_PEER_FLAG_V);
+ stream_putc(s, flags);
+
+ /* Peer Distinguisher */
+ memset (&peer_distinguisher[0], 0, 8);
+ stream_put(s, &peer_distinguisher[0], 8);
+
+ /* Peer Address */
+ if (peer->connection->su.sa.sa_family == AF_INET6)
+ stream_put(s, &peer->connection->su.sin6.sin6_addr, 16);
+ else if (peer->connection->su.sa.sa_family == AF_INET) {
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ stream_put_in_addr(s, &peer->connection->su.sin.sin_addr);
+ } else {
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ }
+
+ /* Peer AS */
+ stream_putl(s, peer->as);
+
+ /* Peer BGP ID */
+ stream_put_in_addr(s, &peer->remote_id);
+
+ /* Timestamp */
+ if (tv) {
+ stream_putl(s, tv->tv_sec);
+ stream_putl(s, tv->tv_usec);
+ } else {
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ }
+}
+
+static void bmp_put_info_tlv(struct stream *s, uint16_t type,
+ const char *string)
+{
+ int len = strlen (string);
+ stream_putw(s, type);
+ stream_putw(s, len);
+ stream_put(s, string, len);
+}
+
+static int bmp_send_initiation(struct bmp *bmp)
+{
+ int len;
+ struct stream *s;
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+ bmp_common_hdr(s, BMP_VERSION_3, BMP_TYPE_INITIATION);
+
+#define BMP_INFO_TYPE_SYSDESCR 1
+#define BMP_INFO_TYPE_SYSNAME 2
+ bmp_put_info_tlv(s, BMP_INFO_TYPE_SYSDESCR,
+ FRR_FULL_NAME " " FRR_VER_SHORT);
+ bmp_put_info_tlv(s, BMP_INFO_TYPE_SYSNAME, cmd_hostname_get());
+
+ len = stream_get_endp(s);
+ stream_putl_at(s, BMP_LENGTH_POS, len); //message length is set.
+
+ pullwr_write_stream(bmp->pullwr, s);
+ stream_free(s);
+ return 0;
+}
+
+static void bmp_notify_put(struct stream *s, struct bgp_notify *nfy)
+{
+ size_t len_pos;
+ uint8_t marker[16] = {
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff,
+ };
+
+ stream_put(s, marker, sizeof(marker));
+ len_pos = stream_get_endp(s);
+ stream_putw(s, 0);
+ stream_putc(s, BGP_MSG_NOTIFY);
+ stream_putc(s, nfy->code);
+ stream_putc(s, nfy->subcode);
+ stream_put(s, nfy->data, nfy->length);
+
+ stream_putw_at(s, len_pos, stream_get_endp(s) - len_pos
+ + sizeof(marker));
+}
+
+static struct stream *bmp_peerstate(struct peer *peer, bool down)
+{
+ struct stream *s;
+ size_t len;
+ struct timeval uptime, uptime_real;
+
+ uptime.tv_sec = peer->uptime;
+ uptime.tv_usec = 0;
+ monotime_to_realtime(&uptime, &uptime_real);
+
+#define BGP_BMP_MAX_PACKET_SIZE 1024
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+
+ if (peer_established(peer->connection) && !down) {
+ struct bmp_bgp_peer *bbpeer;
+
+ bmp_common_hdr(s, BMP_VERSION_3,
+ BMP_TYPE_PEER_UP_NOTIFICATION);
+ bmp_per_peer_hdr(s, peer, 0, &uptime_real);
+
+ /* Local Address (16 bytes) */
+ if (peer->su_local->sa.sa_family == AF_INET6)
+ stream_put(s, &peer->su_local->sin6.sin6_addr, 16);
+ else if (peer->su_local->sa.sa_family == AF_INET) {
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ stream_putl(s, 0);
+ stream_put_in_addr(s, &peer->su_local->sin.sin_addr);
+ }
+
+ /* Local Port, Remote Port */
+ if (peer->su_local->sa.sa_family == AF_INET6)
+ stream_putw(s, htons(peer->su_local->sin6.sin6_port));
+ else if (peer->su_local->sa.sa_family == AF_INET)
+ stream_putw(s, htons(peer->su_local->sin.sin_port));
+ if (peer->su_remote->sa.sa_family == AF_INET6)
+ stream_putw(s, htons(peer->su_remote->sin6.sin6_port));
+ else if (peer->su_remote->sa.sa_family == AF_INET)
+ stream_putw(s, htons(peer->su_remote->sin.sin_port));
+
+ static const uint8_t dummy_open[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0x00, 0x13, 0x01,
+ };
+
+ bbpeer = bmp_bgp_peer_find(peer->qobj_node.nid);
+
+ if (bbpeer && bbpeer->open_tx)
+ stream_put(s, bbpeer->open_tx, bbpeer->open_tx_len);
+ else {
+ stream_put(s, dummy_open, sizeof(dummy_open));
+ zlog_warn("bmp: missing TX OPEN message for peer %s",
+ peer->host);
+ }
+ if (bbpeer && bbpeer->open_rx)
+ stream_put(s, bbpeer->open_rx, bbpeer->open_rx_len);
+ else {
+ stream_put(s, dummy_open, sizeof(dummy_open));
+ zlog_warn("bmp: missing RX OPEN message for peer %s",
+ peer->host);
+ }
+
+ if (peer->desc)
+ bmp_put_info_tlv(s, 0, peer->desc);
+ } else {
+ uint8_t type;
+ size_t type_pos;
+
+ bmp_common_hdr(s, BMP_VERSION_3,
+ BMP_TYPE_PEER_DOWN_NOTIFICATION);
+ bmp_per_peer_hdr(s, peer, 0, &uptime_real);
+
+ type_pos = stream_get_endp(s);
+ stream_putc(s, 0); /* placeholder for down reason */
+
+ switch (peer->last_reset) {
+ case PEER_DOWN_NOTIFY_RECEIVED:
+ type = BMP_PEERDOWN_REMOTE_NOTIFY;
+ bmp_notify_put(s, &peer->notify);
+ break;
+ case PEER_DOWN_CLOSE_SESSION:
+ type = BMP_PEERDOWN_REMOTE_CLOSE;
+ break;
+ case PEER_DOWN_WAITING_NHT:
+ type = BMP_PEERDOWN_LOCAL_FSM;
+ stream_putw(s, BGP_FSM_TcpConnectionFails);
+ break;
+ /*
+ * TODO: Map remaining PEER_DOWN_* reasons to RFC event codes.
+ * TODO: Implement BMP_PEERDOWN_LOCAL_NOTIFY.
+ *
+ * See RFC7854 ss. 4.9
+ */
+ default:
+ type = BMP_PEERDOWN_LOCAL_FSM;
+ stream_putw(s, BMP_PEER_DOWN_NO_RELEVANT_EVENT_CODE);
+ break;
+ }
+ stream_putc_at(s, type_pos, type);
+ }
+
+ len = stream_get_endp(s);
+ stream_putl_at(s, BMP_LENGTH_POS, len); //message length is set.
+ return s;
+}
+
+
+static int bmp_send_peerup(struct bmp *bmp)
+{
+ struct peer *peer;
+ struct listnode *node;
+ struct stream *s;
+
+ /* Walk down all peers */
+ for (ALL_LIST_ELEMENTS_RO(bmp->targets->bgp->peer, node, peer)) {
+ s = bmp_peerstate(peer, false);
+ pullwr_write_stream(bmp->pullwr, s);
+ stream_free(s);
+ }
+
+ return 0;
+}
+
+/* XXX: kludge - filling the pullwr's buffer */
+static void bmp_send_all(struct bmp_bgp *bmpbgp, struct stream *s)
+{
+ struct bmp_targets *bt;
+ struct bmp *bmp;
+
+ frr_each(bmp_targets, &bmpbgp->targets, bt)
+ frr_each(bmp_session, &bt->sessions, bmp)
+ pullwr_write_stream(bmp->pullwr, s);
+ stream_free(s);
+}
+
+/*
+ * Route Mirroring
+ */
+
+#define BMP_MIRROR_TLV_TYPE_BGP_MESSAGE 0
+#define BMP_MIRROR_TLV_TYPE_INFO 1
+
+#define BMP_MIRROR_INFO_CODE_ERRORPDU 0
+#define BMP_MIRROR_INFO_CODE_LOSTMSGS 1
+
+static struct bmp_mirrorq *bmp_pull_mirror(struct bmp *bmp)
+{
+ struct bmp_mirrorq *bmq;
+
+ bmq = bmp->mirrorpos;
+ if (!bmq)
+ return NULL;
+
+ bmp->mirrorpos = bmp_mirrorq_next(&bmp->targets->bmpbgp->mirrorq, bmq);
+
+ bmq->refcount--;
+ if (!bmq->refcount) {
+ bmp->targets->bmpbgp->mirror_qsize -= sizeof(*bmq) + bmq->len;
+ bmp_mirrorq_del(&bmp->targets->bmpbgp->mirrorq, bmq);
+ }
+ return bmq;
+}
+
+static void bmp_mirror_cull(struct bmp_bgp *bmpbgp)
+{
+ while (bmpbgp->mirror_qsize > bmpbgp->mirror_qsizelimit) {
+ struct bmp_mirrorq *bmq, *inner;
+ struct bmp_targets *bt;
+ struct bmp *bmp;
+
+ bmq = bmp_mirrorq_first(&bmpbgp->mirrorq);
+
+ frr_each(bmp_targets, &bmpbgp->targets, bt) {
+ if (!bt->mirror)
+ continue;
+ frr_each(bmp_session, &bt->sessions, bmp) {
+ if (bmp->mirrorpos != bmq)
+ continue;
+
+ while ((inner = bmp_pull_mirror(bmp))) {
+ if (!inner->refcount)
+ XFREE(MTYPE_BMP_MIRRORQ,
+ inner);
+ }
+
+ zlog_warn("bmp[%s] lost mirror messages due to buffer size limit",
+ bmp->remote);
+ bmp->mirror_lost = true;
+ pullwr_bump(bmp->pullwr);
+ }
+ }
+ }
+}
+
+static int bmp_mirror_packet(struct peer *peer, uint8_t type, bgp_size_t size,
+ struct stream *packet)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(peer->bgp);
+ struct timeval tv;
+ struct bmp_mirrorq *qitem;
+ struct bmp_targets *bt;
+ struct bmp *bmp;
+
+ frrtrace(3, frr_bgp, bmp_mirror_packet, peer, type, packet);
+
+ gettimeofday(&tv, NULL);
+
+ if (type == BGP_MSG_OPEN) {
+ struct bmp_bgp_peer *bbpeer = bmp_bgp_peer_get(peer);
+
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_rx);
+
+ bbpeer->open_rx_len = size;
+ bbpeer->open_rx = XMALLOC(MTYPE_BMP_OPEN, size);
+ memcpy(bbpeer->open_rx, packet->data, size);
+ }
+
+ if (!bmpbgp)
+ return 0;
+
+ qitem = XCALLOC(MTYPE_BMP_MIRRORQ, sizeof(*qitem) + size);
+ qitem->peerid = peer->qobj_node.nid;
+ qitem->tv = tv;
+ qitem->len = size;
+ memcpy(qitem->data, packet->data, size);
+
+ frr_each(bmp_targets, &bmpbgp->targets, bt) {
+ if (!bt->mirror)
+ continue;
+ frr_each(bmp_session, &bt->sessions, bmp) {
+ qitem->refcount++;
+ if (!bmp->mirrorpos)
+ bmp->mirrorpos = qitem;
+ pullwr_bump(bmp->pullwr);
+ }
+ }
+ if (qitem->refcount == 0)
+ XFREE(MTYPE_BMP_MIRRORQ, qitem);
+ else {
+ bmpbgp->mirror_qsize += sizeof(*qitem) + size;
+ bmp_mirrorq_add_tail(&bmpbgp->mirrorq, qitem);
+
+ bmp_mirror_cull(bmpbgp);
+
+ bmpbgp->mirror_qsizemax = MAX(bmpbgp->mirror_qsizemax,
+ bmpbgp->mirror_qsize);
+ }
+ return 0;
+}
+
+static void bmp_wrmirror_lost(struct bmp *bmp, struct pullwr *pullwr)
+{
+ struct stream *s;
+ struct timeval tv;
+
+ gettimeofday(&tv, NULL);
+
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+
+ bmp_common_hdr(s, BMP_VERSION_3, BMP_TYPE_ROUTE_MIRRORING);
+ bmp_per_peer_hdr(s, bmp->targets->bgp->peer_self, 0, &tv);
+
+ stream_putw(s, BMP_MIRROR_TLV_TYPE_INFO);
+ stream_putw(s, 2);
+ stream_putw(s, BMP_MIRROR_INFO_CODE_LOSTMSGS);
+ stream_putl_at(s, BMP_LENGTH_POS, stream_get_endp(s));
+
+ bmp->cnt_mirror_overruns++;
+ pullwr_write_stream(bmp->pullwr, s);
+ stream_free(s);
+}
+
+static bool bmp_wrmirror(struct bmp *bmp, struct pullwr *pullwr)
+{
+ struct bmp_mirrorq *bmq;
+ struct peer *peer;
+ bool written = false;
+
+ if (bmp->mirror_lost) {
+ bmp_wrmirror_lost(bmp, pullwr);
+ bmp->mirror_lost = false;
+ return true;
+ }
+
+ bmq = bmp_pull_mirror(bmp);
+ if (!bmq)
+ return false;
+
+ peer = QOBJ_GET_TYPESAFE(bmq->peerid, peer);
+ if (!peer) {
+ zlog_info("bmp: skipping mirror message for deleted peer");
+ goto out;
+ }
+
+ struct stream *s;
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+
+ bmp_common_hdr(s, BMP_VERSION_3, BMP_TYPE_ROUTE_MIRRORING);
+ bmp_per_peer_hdr(s, peer, 0, &bmq->tv);
+
+ /* BMP Mirror TLV. */
+ stream_putw(s, BMP_MIRROR_TLV_TYPE_BGP_MESSAGE);
+ stream_putw(s, bmq->len);
+ stream_putl_at(s, BMP_LENGTH_POS, stream_get_endp(s) + bmq->len);
+
+ bmp->cnt_mirror++;
+ pullwr_write_stream(bmp->pullwr, s);
+ pullwr_write(bmp->pullwr, bmq->data, bmq->len);
+
+ stream_free(s);
+ written = true;
+
+out:
+ if (!bmq->refcount)
+ XFREE(MTYPE_BMP_MIRRORQ, bmq);
+ return written;
+}
+
+static int bmp_outgoing_packet(struct peer *peer, uint8_t type, bgp_size_t size,
+ struct stream *packet)
+{
+ if (type == BGP_MSG_OPEN) {
+ frrtrace(2, frr_bgp, bmp_update_saved_open, peer, packet);
+
+ struct bmp_bgp_peer *bbpeer = bmp_bgp_peer_get(peer);
+
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_tx);
+
+ bbpeer->open_tx_len = size;
+ bbpeer->open_tx = XMALLOC(MTYPE_BMP_OPEN, size);
+ memcpy(bbpeer->open_tx, packet->data, size);
+ }
+ return 0;
+}
+
+static int bmp_peer_status_changed(struct peer *peer)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(peer->bgp);
+ struct bmp_bgp_peer *bbpeer, *bbdopp;
+
+ frrtrace(1, frr_bgp, bmp_peer_status_changed, peer);
+
+ if (!bmpbgp)
+ return 0;
+
+ if (peer->connection->status == Deleted) {
+ bbpeer = bmp_bgp_peer_find(peer->qobj_node.nid);
+ if (bbpeer) {
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_rx);
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_tx);
+ bmp_peerh_del(&bmp_peerh, bbpeer);
+ XFREE(MTYPE_BMP_PEER, bbpeer);
+ }
+ return 0;
+ }
+
+ /* Check if this peer just went to Established */
+ if ((peer->connection->ostatus != OpenConfirm) ||
+ !(peer_established(peer->connection)))
+ return 0;
+
+ if (peer->doppelganger &&
+ (peer->doppelganger->connection->status != Deleted)) {
+ bbpeer = bmp_bgp_peer_get(peer);
+ bbdopp = bmp_bgp_peer_find(peer->doppelganger->qobj_node.nid);
+ if (bbdopp) {
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_tx);
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_rx);
+
+ bbpeer->open_tx = bbdopp->open_tx;
+ bbpeer->open_tx_len = bbdopp->open_tx_len;
+ bbpeer->open_rx = bbdopp->open_rx;
+ bbpeer->open_rx_len = bbdopp->open_rx_len;
+
+ bmp_peerh_del(&bmp_peerh, bbdopp);
+ XFREE(MTYPE_BMP_PEER, bbdopp);
+ }
+ }
+
+ bmp_send_all(bmpbgp, bmp_peerstate(peer, false));
+ return 0;
+}
+
+static int bmp_peer_backward(struct peer *peer)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(peer->bgp);
+ struct bmp_bgp_peer *bbpeer;
+
+ frrtrace(1, frr_bgp, bmp_peer_backward_transition, peer);
+
+ if (!bmpbgp)
+ return 0;
+
+ bbpeer = bmp_bgp_peer_find(peer->qobj_node.nid);
+ if (bbpeer) {
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_tx);
+ bbpeer->open_tx_len = 0;
+ XFREE(MTYPE_BMP_OPEN, bbpeer->open_rx);
+ bbpeer->open_rx_len = 0;
+ }
+
+ bmp_send_all(bmpbgp, bmp_peerstate(peer, true));
+ return 0;
+}
+
+static void bmp_eor(struct bmp *bmp, afi_t afi, safi_t safi, uint8_t flags)
+{
+ struct peer *peer;
+ struct listnode *node;
+ struct stream *s, *s2;
+ iana_afi_t pkt_afi = IANA_AFI_IPV4;
+ iana_safi_t pkt_safi = IANA_SAFI_UNICAST;
+
+ frrtrace(3, frr_bgp, bmp_eor, afi, safi, flags);
+
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+
+ /* Make BGP update packet. */
+ bgp_packet_set_marker(s, BGP_MSG_UPDATE);
+
+ /* Unfeasible Routes Length */
+ stream_putw(s, 0);
+
+ if (afi == AFI_IP && safi == SAFI_UNICAST) {
+ /* Total Path Attribute Length */
+ stream_putw(s, 0);
+ } else {
+ /* Convert AFI, SAFI to values for packet. */
+ bgp_map_afi_safi_int2iana(afi, safi, &pkt_afi, &pkt_safi);
+
+ /* Total Path Attribute Length */
+ stream_putw(s, 6);
+ stream_putc(s, BGP_ATTR_FLAG_OPTIONAL);
+ stream_putc(s, BGP_ATTR_MP_UNREACH_NLRI);
+ stream_putc(s, 3);
+ stream_putw(s, pkt_afi);
+ stream_putc(s, pkt_safi);
+ }
+
+ bgp_packet_set_size(s);
+
+ for (ALL_LIST_ELEMENTS_RO(bmp->targets->bgp->peer, node, peer)) {
+ if (!peer->afc_nego[afi][safi])
+ continue;
+
+ s2 = stream_new(BGP_MAX_PACKET_SIZE);
+
+ bmp_common_hdr(s2, BMP_VERSION_3,
+ BMP_TYPE_ROUTE_MONITORING);
+ bmp_per_peer_hdr(s2, peer, flags, NULL);
+
+ stream_putl_at(s2, BMP_LENGTH_POS,
+ stream_get_endp(s) + stream_get_endp(s2));
+
+ bmp->cnt_update++;
+ pullwr_write_stream(bmp->pullwr, s2);
+ pullwr_write_stream(bmp->pullwr, s);
+ stream_free(s2);
+ }
+ stream_free(s);
+}
+
+static struct stream *bmp_update(const struct prefix *p, struct prefix_rd *prd,
+ struct peer *peer, struct attr *attr,
+ afi_t afi, safi_t safi)
+{
+ struct bpacket_attr_vec_arr vecarr;
+ struct stream *s;
+ size_t attrlen_pos = 0, mpattrlen_pos = 0;
+ bgp_size_t total_attr_len = 0;
+
+ bpacket_attr_vec_arr_reset(&vecarr);
+
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+ bgp_packet_set_marker(s, BGP_MSG_UPDATE);
+
+ /* 2: withdrawn routes length */
+ stream_putw(s, 0);
+
+ /* 3: total attributes length - attrlen_pos stores the position */
+ attrlen_pos = stream_get_endp(s);
+ stream_putw(s, 0);
+
+ /* 5: Encode all the attributes, except MP_REACH_NLRI attr. */
+ total_attr_len =
+ bgp_packet_attribute(NULL, peer, s, attr, &vecarr, NULL, afi,
+ safi, peer, NULL, NULL, 0, 0, 0, NULL);
+
+ /* space check? */
+
+ /* peer_cap_enhe & add-path removed */
+ if (afi == AFI_IP && safi == SAFI_UNICAST)
+ stream_put_prefix(s, p);
+ else {
+ size_t p1 = stream_get_endp(s);
+
+ /* MPLS removed for now */
+
+ mpattrlen_pos = bgp_packet_mpattr_start(s, peer, afi, safi,
+ &vecarr, attr);
+ bgp_packet_mpattr_prefix(s, afi, safi, p, prd, NULL, 0, 0, 0,
+ attr);
+ bgp_packet_mpattr_end(s, mpattrlen_pos);
+ total_attr_len += stream_get_endp(s) - p1;
+ }
+
+ /* set the total attribute length correctly */
+ stream_putw_at(s, attrlen_pos, total_attr_len);
+ bgp_packet_set_size(s);
+ return s;
+}
+
+static struct stream *bmp_withdraw(const struct prefix *p,
+ struct prefix_rd *prd, afi_t afi,
+ safi_t safi)
+{
+ struct stream *s;
+ size_t attrlen_pos = 0, mp_start, mplen_pos;
+ bgp_size_t total_attr_len = 0;
+ bgp_size_t unfeasible_len;
+
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+
+ bgp_packet_set_marker(s, BGP_MSG_UPDATE);
+ stream_putw(s, 0);
+
+ if (afi == AFI_IP && safi == SAFI_UNICAST) {
+ stream_put_prefix(s, p);
+ unfeasible_len = stream_get_endp(s) - BGP_HEADER_SIZE
+ - BGP_UNFEASIBLE_LEN;
+ stream_putw_at(s, BGP_HEADER_SIZE, unfeasible_len);
+ stream_putw(s, 0);
+ } else {
+ attrlen_pos = stream_get_endp(s);
+ /* total attr length = 0 for now. reevaluate later */
+ stream_putw(s, 0);
+ mp_start = stream_get_endp(s);
+ mplen_pos = bgp_packet_mpunreach_start(s, afi, safi);
+
+ bgp_packet_mpunreach_prefix(s, p, afi, safi, prd, NULL, 0, 0, 0,
+ NULL);
+ /* Set the mp_unreach attr's length */
+ bgp_packet_mpunreach_end(s, mplen_pos);
+
+ /* Set total path attribute length. */
+ total_attr_len = stream_get_endp(s) - mp_start;
+ stream_putw_at(s, attrlen_pos, total_attr_len);
+ }
+
+ bgp_packet_set_size(s);
+ return s;
+}
+
+static void bmp_monitor(struct bmp *bmp, struct peer *peer, uint8_t flags,
+ const struct prefix *p, struct prefix_rd *prd,
+ struct attr *attr, afi_t afi, safi_t safi,
+ time_t uptime)
+{
+ struct stream *hdr, *msg;
+ struct timeval tv = { .tv_sec = uptime, .tv_usec = 0 };
+ struct timeval uptime_real;
+
+ monotime_to_realtime(&tv, &uptime_real);
+ if (attr)
+ msg = bmp_update(p, prd, peer, attr, afi, safi);
+ else
+ msg = bmp_withdraw(p, prd, afi, safi);
+
+ hdr = stream_new(BGP_MAX_PACKET_SIZE);
+ bmp_common_hdr(hdr, BMP_VERSION_3, BMP_TYPE_ROUTE_MONITORING);
+ bmp_per_peer_hdr(hdr, peer, flags, &uptime_real);
+
+ stream_putl_at(hdr, BMP_LENGTH_POS,
+ stream_get_endp(hdr) + stream_get_endp(msg));
+
+ bmp->cnt_update++;
+ pullwr_write_stream(bmp->pullwr, hdr);
+ pullwr_write_stream(bmp->pullwr, msg);
+ stream_free(hdr);
+ stream_free(msg);
+}
+
+static bool bmp_wrsync(struct bmp *bmp, struct pullwr *pullwr)
+{
+ afi_t afi;
+ safi_t safi;
+
+ if (bmp->syncafi == AFI_MAX) {
+ FOREACH_AFI_SAFI (afi, safi) {
+ if (bmp->afistate[afi][safi] != BMP_AFI_NEEDSYNC)
+ continue;
+
+ bmp->afistate[afi][safi] = BMP_AFI_SYNC;
+
+ bmp->syncafi = afi;
+ bmp->syncsafi = safi;
+ bmp->syncpeerid = 0;
+ memset(&bmp->syncpos, 0, sizeof(bmp->syncpos));
+ bmp->syncpos.family = afi2family(afi);
+ bmp->syncrdpos = NULL;
+ zlog_info("bmp[%s] %s %s sending table",
+ bmp->remote,
+ afi2str(bmp->syncafi),
+ safi2str(bmp->syncsafi));
+ /* break does not work here, 2 loops... */
+ goto afibreak;
+ }
+ if (bmp->syncafi == AFI_MAX)
+ return false;
+ }
+
+afibreak:
+ afi = bmp->syncafi;
+ safi = bmp->syncsafi;
+
+ if (!bmp->targets->afimon[afi][safi]) {
+ /* shouldn't happen */
+ bmp->afistate[afi][safi] = BMP_AFI_INACTIVE;
+ bmp->syncafi = AFI_MAX;
+ bmp->syncsafi = SAFI_MAX;
+ return true;
+ }
+
+ struct bgp_table *table = bmp->targets->bgp->rib[afi][safi];
+ struct bgp_dest *bn = NULL;
+ struct bgp_path_info *bpi = NULL, *bpiter;
+ struct bgp_adj_in *adjin = NULL, *adjiter;
+
+ if ((afi == AFI_L2VPN && safi == SAFI_EVPN) ||
+ (safi == SAFI_MPLS_VPN)) {
+ /* initialize syncrdpos to the first
+ * mid-layer table entry
+ */
+ if (!bmp->syncrdpos) {
+ bmp->syncrdpos = bgp_table_top(table);
+ if (!bmp->syncrdpos)
+ goto eor;
+ }
+
+ /* look for a valid mid-layer table */
+ do {
+ table = bgp_dest_get_bgp_table_info(bmp->syncrdpos);
+ if (table) {
+ break;
+ }
+ bmp->syncrdpos = bgp_route_next(bmp->syncrdpos);
+ } while (bmp->syncrdpos);
+
+ /* mid-layer table completed */
+ if (!bmp->syncrdpos)
+ goto eor;
+ }
+
+ bn = bgp_node_lookup(table, &bmp->syncpos);
+ do {
+ if (!bn) {
+ bn = bgp_table_get_next(table, &bmp->syncpos);
+ if (!bn) {
+ if ((afi == AFI_L2VPN && safi == SAFI_EVPN) ||
+ (safi == SAFI_MPLS_VPN)) {
+ /* reset bottom-layer pointer */
+ memset(&bmp->syncpos, 0,
+ sizeof(bmp->syncpos));
+ bmp->syncpos.family = afi2family(afi);
+ /* check whethere there is a valid
+ * next mid-layer table, otherwise
+ * declare table completed (eor)
+ */
+ for (bmp->syncrdpos = bgp_route_next(
+ bmp->syncrdpos);
+ bmp->syncrdpos;
+ bmp->syncrdpos = bgp_route_next(
+ bmp->syncrdpos))
+ if (bgp_dest_get_bgp_table_info(
+ bmp->syncrdpos))
+ return true;
+ }
+ eor:
+ zlog_info("bmp[%s] %s %s table completed (EoR)",
+ bmp->remote, afi2str(afi),
+ safi2str(safi));
+ bmp_eor(bmp, afi, safi, BMP_PEER_FLAG_L);
+ bmp_eor(bmp, afi, safi, 0);
+
+ bmp->afistate[afi][safi] = BMP_AFI_LIVE;
+ bmp->syncafi = AFI_MAX;
+ bmp->syncsafi = SAFI_MAX;
+ return true;
+ }
+ bmp->syncpeerid = 0;
+ prefix_copy(&bmp->syncpos, bgp_dest_get_prefix(bn));
+ }
+
+ if (bmp->targets->afimon[afi][safi] & BMP_MON_POSTPOLICY) {
+ for (bpiter = bgp_dest_get_bgp_path_info(bn); bpiter;
+ bpiter = bpiter->next) {
+ if (!CHECK_FLAG(bpiter->flags, BGP_PATH_VALID))
+ continue;
+ if (bpiter->peer->qobj_node.nid
+ <= bmp->syncpeerid)
+ continue;
+ if (bpi && bpiter->peer->qobj_node.nid
+ > bpi->peer->qobj_node.nid)
+ continue;
+ bpi = bpiter;
+ }
+ }
+ if (bmp->targets->afimon[afi][safi] & BMP_MON_PREPOLICY) {
+ for (adjiter = bn->adj_in; adjiter;
+ adjiter = adjiter->next) {
+ if (adjiter->peer->qobj_node.nid
+ <= bmp->syncpeerid)
+ continue;
+ if (adjin && adjiter->peer->qobj_node.nid
+ > adjin->peer->qobj_node.nid)
+ continue;
+ adjin = adjiter;
+ }
+ }
+ if (bpi || adjin)
+ break;
+
+ bn = NULL;
+ } while (1);
+
+ if (adjin && bpi
+ && adjin->peer->qobj_node.nid < bpi->peer->qobj_node.nid) {
+ bpi = NULL;
+ bmp->syncpeerid = adjin->peer->qobj_node.nid;
+ } else if (adjin && bpi
+ && adjin->peer->qobj_node.nid > bpi->peer->qobj_node.nid) {
+ adjin = NULL;
+ bmp->syncpeerid = bpi->peer->qobj_node.nid;
+ } else if (bpi) {
+ bmp->syncpeerid = bpi->peer->qobj_node.nid;
+ } else if (adjin) {
+ bmp->syncpeerid = adjin->peer->qobj_node.nid;
+ }
+
+ const struct prefix *bn_p = bgp_dest_get_prefix(bn);
+ struct prefix_rd *prd = NULL;
+ if (((afi == AFI_L2VPN) && (safi == SAFI_EVPN)) ||
+ (safi == SAFI_MPLS_VPN))
+ prd = (struct prefix_rd *)bgp_dest_get_prefix(bmp->syncrdpos);
+
+ if (bpi)
+ bmp_monitor(bmp, bpi->peer, BMP_PEER_FLAG_L, bn_p, prd,
+ bpi->attr, afi, safi, bpi->uptime);
+ if (adjin)
+ bmp_monitor(bmp, adjin->peer, 0, bn_p, prd, adjin->attr, afi,
+ safi, adjin->uptime);
+
+ if (bn)
+ bgp_dest_unlock_node(bn);
+
+ return true;
+}
+
+static struct bmp_queue_entry *bmp_pull(struct bmp *bmp)
+{
+ struct bmp_queue_entry *bqe;
+
+ bqe = bmp->queuepos;
+ if (!bqe)
+ return NULL;
+
+ bmp->queuepos = bmp_qlist_next(&bmp->targets->updlist, bqe);
+
+ bqe->refcount--;
+ if (!bqe->refcount) {
+ bmp_qhash_del(&bmp->targets->updhash, bqe);
+ bmp_qlist_del(&bmp->targets->updlist, bqe);
+ }
+ return bqe;
+}
+
+static bool bmp_wrqueue(struct bmp *bmp, struct pullwr *pullwr)
+{
+ struct bmp_queue_entry *bqe;
+ struct peer *peer;
+ struct bgp_dest *bn = NULL;
+ bool written = false;
+
+ bqe = bmp_pull(bmp);
+ if (!bqe)
+ return false;
+
+ afi_t afi = bqe->afi;
+ safi_t safi = bqe->safi;
+
+ switch (bmp->afistate[afi][safi]) {
+ case BMP_AFI_INACTIVE:
+ case BMP_AFI_NEEDSYNC:
+ goto out;
+ case BMP_AFI_SYNC:
+ if (prefix_cmp(&bqe->p, &bmp->syncpos) <= 0)
+ /* currently syncing but have already passed this
+ * prefix => send it. */
+ break;
+
+ /* currently syncing & haven't reached this prefix yet
+ * => it'll be sent as part of the table sync, no need here */
+ goto out;
+ case BMP_AFI_LIVE:
+ break;
+ }
+
+ peer = QOBJ_GET_TYPESAFE(bqe->peerid, peer);
+ if (!peer) {
+ zlog_info("bmp: skipping queued item for deleted peer");
+ goto out;
+ }
+ if (!peer_established(peer->connection))
+ goto out;
+
+ bool is_vpn = (bqe->afi == AFI_L2VPN && bqe->safi == SAFI_EVPN) ||
+ (bqe->safi == SAFI_MPLS_VPN);
+
+ struct prefix_rd *prd = is_vpn ? &bqe->rd : NULL;
+ bn = bgp_safi_node_lookup(bmp->targets->bgp->rib[afi][safi], safi,
+ &bqe->p, prd);
+
+
+ if (bmp->targets->afimon[afi][safi] & BMP_MON_POSTPOLICY) {
+ struct bgp_path_info *bpi;
+
+ for (bpi = bn ? bgp_dest_get_bgp_path_info(bn) : NULL; bpi;
+ bpi = bpi->next) {
+ if (!CHECK_FLAG(bpi->flags, BGP_PATH_VALID))
+ continue;
+ if (bpi->peer == peer)
+ break;
+ }
+
+ bmp_monitor(bmp, peer, BMP_PEER_FLAG_L, &bqe->p, prd,
+ bpi ? bpi->attr : NULL, afi, safi,
+ bpi ? bpi->uptime : monotime(NULL));
+ written = true;
+ }
+
+ if (bmp->targets->afimon[afi][safi] & BMP_MON_PREPOLICY) {
+ struct bgp_adj_in *adjin;
+
+ for (adjin = bn ? bn->adj_in : NULL; adjin;
+ adjin = adjin->next) {
+ if (adjin->peer == peer)
+ break;
+ }
+ bmp_monitor(bmp, peer, 0, &bqe->p, prd,
+ adjin ? adjin->attr : NULL, afi, safi,
+ adjin ? adjin->uptime : monotime(NULL));
+ written = true;
+ }
+
+out:
+ if (!bqe->refcount)
+ XFREE(MTYPE_BMP_QUEUE, bqe);
+
+ if (bn)
+ bgp_dest_unlock_node(bn);
+
+ return written;
+}
+
+static void bmp_wrfill(struct bmp *bmp, struct pullwr *pullwr)
+{
+ switch(bmp->state) {
+ case BMP_PeerUp:
+ bmp_send_peerup(bmp);
+ bmp->state = BMP_Run;
+ break;
+
+ case BMP_Run:
+ if (bmp_wrmirror(bmp, pullwr))
+ break;
+ if (bmp_wrqueue(bmp, pullwr))
+ break;
+ if (bmp_wrsync(bmp, pullwr))
+ break;
+ break;
+ }
+}
+
+static void bmp_wrerr(struct bmp *bmp, struct pullwr *pullwr, bool eof)
+{
+ if (eof)
+ zlog_info("bmp[%s] disconnected", bmp->remote);
+ else
+ flog_warn(EC_LIB_SYSTEM_CALL, "bmp[%s] connection error: %s",
+ bmp->remote, strerror(errno));
+
+ bmp_close(bmp);
+ bmp_free(bmp);
+}
+
+static void bmp_process_one(struct bmp_targets *bt, struct bgp *bgp, afi_t afi,
+ safi_t safi, struct bgp_dest *bn, struct peer *peer)
+{
+ struct bmp *bmp;
+ struct bmp_queue_entry *bqe, bqeref;
+ size_t refcount;
+
+ refcount = bmp_session_count(&bt->sessions);
+ if (refcount == 0)
+ return;
+
+ memset(&bqeref, 0, sizeof(bqeref));
+ prefix_copy(&bqeref.p, bgp_dest_get_prefix(bn));
+ bqeref.peerid = peer->qobj_node.nid;
+ bqeref.afi = afi;
+ bqeref.safi = safi;
+
+ if ((afi == AFI_L2VPN && safi == SAFI_EVPN && bn->pdest) ||
+ (safi == SAFI_MPLS_VPN))
+ prefix_copy(&bqeref.rd,
+ (struct prefix_rd *)bgp_dest_get_prefix(bn->pdest));
+
+ bqe = bmp_qhash_find(&bt->updhash, &bqeref);
+ if (bqe) {
+ if (bqe->refcount >= refcount)
+ /* nothing to do here */
+ return;
+
+ bmp_qlist_del(&bt->updlist, bqe);
+ } else {
+ bqe = XMALLOC(MTYPE_BMP_QUEUE, sizeof(*bqe));
+ memcpy(bqe, &bqeref, sizeof(*bqe));
+
+ bmp_qhash_add(&bt->updhash, bqe);
+ }
+
+ bqe->refcount = refcount;
+ bmp_qlist_add_tail(&bt->updlist, bqe);
+
+ frr_each (bmp_session, &bt->sessions, bmp)
+ if (!bmp->queuepos)
+ bmp->queuepos = bqe;
+}
+
+static int bmp_process(struct bgp *bgp, afi_t afi, safi_t safi,
+ struct bgp_dest *bn, struct peer *peer, bool withdraw)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(peer->bgp);
+ struct bmp_targets *bt;
+ struct bmp *bmp;
+
+ if (frrtrace_enabled(frr_bgp, bmp_process)) {
+ char pfxprint[PREFIX2STR_BUFFER];
+
+ prefix2str(&bn->rn->p, pfxprint, sizeof(pfxprint));
+ frrtrace(5, frr_bgp, bmp_process, peer, pfxprint, afi, safi,
+ withdraw);
+ }
+
+ if (!bmpbgp)
+ return 0;
+
+ frr_each(bmp_targets, &bmpbgp->targets, bt) {
+ if (!bt->afimon[afi][safi])
+ continue;
+
+ bmp_process_one(bt, bgp, afi, safi, bn, peer);
+
+ frr_each(bmp_session, &bt->sessions, bmp) {
+ pullwr_bump(bmp->pullwr);
+ }
+ }
+ return 0;
+}
+
+static void bmp_stat_put_u32(struct stream *s, size_t *cnt, uint16_t type,
+ uint32_t value)
+{
+ stream_putw(s, type);
+ stream_putw(s, 4);
+ stream_putl(s, value);
+ (*cnt)++;
+}
+
+static void bmp_stats(struct event *thread)
+{
+ struct bmp_targets *bt = EVENT_ARG(thread);
+ struct stream *s;
+ struct peer *peer;
+ struct listnode *node;
+ struct timeval tv;
+
+ if (bt->stat_msec)
+ event_add_timer_msec(bm->master, bmp_stats, bt, bt->stat_msec,
+ &bt->t_stats);
+
+ gettimeofday(&tv, NULL);
+
+ /* Walk down all peers */
+ for (ALL_LIST_ELEMENTS_RO(bt->bgp->peer, node, peer)) {
+ size_t count = 0, count_pos, len;
+
+ if (!peer_established(peer->connection))
+ continue;
+
+ s = stream_new(BGP_MAX_PACKET_SIZE);
+ bmp_common_hdr(s, BMP_VERSION_3, BMP_TYPE_STATISTICS_REPORT);
+ bmp_per_peer_hdr(s, peer, 0, &tv);
+
+ count_pos = stream_get_endp(s);
+ stream_putl(s, 0);
+
+ bmp_stat_put_u32(s, &count, BMP_STATS_PFX_REJECTED,
+ peer->stat_pfx_filter);
+ bmp_stat_put_u32(s, &count, BMP_STATS_UPD_LOOP_ASPATH,
+ peer->stat_pfx_aspath_loop);
+ bmp_stat_put_u32(s, &count, BMP_STATS_UPD_LOOP_ORIGINATOR,
+ peer->stat_pfx_originator_loop);
+ bmp_stat_put_u32(s, &count, BMP_STATS_UPD_LOOP_CLUSTER,
+ peer->stat_pfx_cluster_loop);
+ bmp_stat_put_u32(s, &count, BMP_STATS_PFX_DUP_WITHDRAW,
+ peer->stat_pfx_dup_withdraw);
+ bmp_stat_put_u32(s, &count, BMP_STATS_UPD_7606_WITHDRAW,
+ peer->stat_upd_7606);
+ bmp_stat_put_u32(s, &count, BMP_STATS_FRR_NH_INVALID,
+ peer->stat_pfx_nh_invalid);
+
+ stream_putl_at(s, count_pos, count);
+
+ len = stream_get_endp(s);
+ stream_putl_at(s, BMP_LENGTH_POS, len);
+
+ bmp_send_all(bt->bmpbgp, s);
+ }
+}
+
+/* read from the BMP socket to detect session termination */
+static void bmp_read(struct event *t)
+{
+ struct bmp *bmp = EVENT_ARG(t);
+ char buf[1024];
+ ssize_t n;
+
+ bmp->t_read = NULL;
+
+ n = read(bmp->socket, buf, sizeof(buf));
+ if (n >= 1) {
+ zlog_info("bmp[%s]: unexpectedly received %zu bytes", bmp->remote, n);
+ } else if (n == 0) {
+ /* the TCP session was terminated by the far end */
+ bmp_wrerr(bmp, NULL, true);
+ return;
+ } else if (!(errno == EAGAIN || errno == EWOULDBLOCK || errno == EINTR)) {
+ /* the TCP session experienced a fatal error, likely a timeout */
+ bmp_wrerr(bmp, NULL, false);
+ return;
+ }
+
+ event_add_read(bm->master, bmp_read, bmp, bmp->socket, &bmp->t_read);
+}
+
+static struct bmp *bmp_open(struct bmp_targets *bt, int bmp_sock)
+{
+ union sockunion su, *sumem;
+ struct prefix p;
+ int on = 1;
+ struct access_list *acl = NULL;
+ enum filter_type ret;
+ char buf[SU_ADDRSTRLEN];
+ struct bmp *bmp;
+
+ sumem = sockunion_getpeername(bmp_sock);
+ if (!sumem) {
+ close(bmp_sock);
+ return NULL;
+ }
+ memcpy(&su, sumem, sizeof(su));
+ sockunion_free(sumem);
+
+ set_nonblocking(bmp_sock);
+ set_cloexec(bmp_sock);
+
+ if (!sockunion2hostprefix(&su, &p)) {
+ close(bmp_sock);
+ return NULL;
+ }
+
+ acl = NULL;
+ switch (p.family) {
+ case AF_INET:
+ acl = access_list_lookup(AFI_IP, bt->acl_name);
+ break;
+ case AF_INET6:
+ acl = access_list_lookup(AFI_IP6, bt->acl6_name);
+ break;
+ default:
+ break;
+ }
+
+ ret = FILTER_PERMIT;
+ if (acl) {
+ ret = access_list_apply(acl, &p);
+ }
+
+ sockunion2str(&su, buf, SU_ADDRSTRLEN);
+ snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), ":%u",
+ su.sa.sa_family == AF_INET
+ ? ntohs(su.sin.sin_port)
+ : ntohs(su.sin6.sin6_port));
+
+ if (ret == FILTER_DENY) {
+ bt->cnt_aclrefused++;
+ zlog_info("bmp[%s] connection refused by access-list", buf);
+ close(bmp_sock);
+ return NULL;
+ }
+ bt->cnt_accept++;
+
+ if (setsockopt(bmp_sock, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)) < 0)
+ flog_err(EC_LIB_SOCKET, "bmp: %d can't setsockopt SO_KEEPALIVE: %s(%d)",
+ bmp_sock, safe_strerror(errno), errno);
+ if (setsockopt(bmp_sock, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
+ flog_err(EC_LIB_SOCKET, "bmp: %d can't setsockopt TCP_NODELAY: %s(%d)",
+ bmp_sock, safe_strerror(errno), errno);
+
+ zlog_info("bmp[%s] connection established", buf);
+
+ /* Allocate new BMP structure and set up default values. */
+ bmp = bmp_new(bt, bmp_sock);
+ strlcpy(bmp->remote, buf, sizeof(bmp->remote));
+
+ bmp->state = BMP_PeerUp;
+ bmp->pullwr = pullwr_new(bm->master, bmp_sock, bmp, bmp_wrfill,
+ bmp_wrerr);
+ event_add_read(bm->master, bmp_read, bmp, bmp_sock, &bmp->t_read);
+ bmp_send_initiation(bmp);
+
+ return bmp;
+}
+
+/* Accept BMP connection. */
+static void bmp_accept(struct event *thread)
+{
+ union sockunion su;
+ struct bmp_listener *bl = EVENT_ARG(thread);
+ int bmp_sock;
+
+ /* We continue hearing BMP socket. */
+ event_add_read(bm->master, bmp_accept, bl, bl->sock, &bl->t_accept);
+
+ memset(&su, 0, sizeof(union sockunion));
+
+ /* We can handle IPv4 or IPv6 socket. */
+ bmp_sock = sockunion_accept(bl->sock, &su);
+ if (bmp_sock < 0) {
+ zlog_info("bmp: accept_sock failed: %s", safe_strerror(errno));
+ return;
+ }
+ bmp_open(bl->targets, bmp_sock);
+}
+
+static void bmp_close(struct bmp *bmp)
+{
+ struct bmp_queue_entry *bqe;
+ struct bmp_mirrorq *bmq;
+
+ EVENT_OFF(bmp->t_read);
+
+ if (bmp->active)
+ bmp_active_disconnected(bmp->active);
+
+ while ((bmq = bmp_pull_mirror(bmp)))
+ if (!bmq->refcount)
+ XFREE(MTYPE_BMP_MIRRORQ, bmq);
+ while ((bqe = bmp_pull(bmp)))
+ if (!bqe->refcount)
+ XFREE(MTYPE_BMP_QUEUE, bqe);
+
+ EVENT_OFF(bmp->t_read);
+ pullwr_del(bmp->pullwr);
+ close(bmp->socket);
+}
+
+static struct bmp_bgp *bmp_bgp_find(struct bgp *bgp)
+{
+ struct bmp_bgp dummy = { .bgp = bgp };
+ return bmp_bgph_find(&bmp_bgph, &dummy);
+}
+
+static struct bmp_bgp *bmp_bgp_get(struct bgp *bgp)
+{
+ struct bmp_bgp *bmpbgp;
+
+ bmpbgp = bmp_bgp_find(bgp);
+ if (bmpbgp)
+ return bmpbgp;
+
+ bmpbgp = XCALLOC(MTYPE_BMP, sizeof(*bmpbgp));
+ bmpbgp->bgp = bgp;
+ bmpbgp->mirror_qsizelimit = ~0UL;
+ bmp_mirrorq_init(&bmpbgp->mirrorq);
+ bmp_bgph_add(&bmp_bgph, bmpbgp);
+
+ return bmpbgp;
+}
+
+static void bmp_bgp_put(struct bmp_bgp *bmpbgp)
+{
+ struct bmp_targets *bt;
+ struct bmp_listener *bl;
+
+ bmp_bgph_del(&bmp_bgph, bmpbgp);
+
+ frr_each_safe (bmp_targets, &bmpbgp->targets, bt) {
+ frr_each_safe (bmp_listeners, &bt->listeners, bl)
+ bmp_listener_put(bl);
+
+ bmp_targets_put(bt);
+ }
+
+ bmp_mirrorq_fini(&bmpbgp->mirrorq);
+ XFREE(MTYPE_BMP, bmpbgp);
+}
+
+static int bmp_bgp_del(struct bgp *bgp)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(bgp);
+
+ if (bmpbgp)
+ bmp_bgp_put(bmpbgp);
+ return 0;
+}
+
+static struct bmp_bgp_peer *bmp_bgp_peer_find(uint64_t peerid)
+{
+ struct bmp_bgp_peer dummy = { .peerid = peerid };
+ return bmp_peerh_find(&bmp_peerh, &dummy);
+}
+
+static struct bmp_bgp_peer *bmp_bgp_peer_get(struct peer *peer)
+{
+ struct bmp_bgp_peer *bbpeer;
+
+ bbpeer = bmp_bgp_peer_find(peer->qobj_node.nid);
+ if (bbpeer)
+ return bbpeer;
+
+ bbpeer = XCALLOC(MTYPE_BMP_PEER, sizeof(*bbpeer));
+ bbpeer->peerid = peer->qobj_node.nid;
+ bmp_peerh_add(&bmp_peerh, bbpeer);
+
+ return bbpeer;
+}
+
+static struct bmp_targets *bmp_targets_find1(struct bgp *bgp, const char *name)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(bgp);
+ struct bmp_targets dummy;
+
+ if (!bmpbgp)
+ return NULL;
+ dummy.name = (char *)name;
+ return bmp_targets_find(&bmpbgp->targets, &dummy);
+}
+
+static struct bmp_targets *bmp_targets_get(struct bgp *bgp, const char *name)
+{
+ struct bmp_targets *bt;
+
+ bt = bmp_targets_find1(bgp, name);
+ if (bt)
+ return bt;
+
+ bt = XCALLOC(MTYPE_BMP_TARGETS, sizeof(*bt));
+ bt->name = XSTRDUP(MTYPE_BMP_TARGETSNAME, name);
+ bt->bgp = bgp;
+ bt->bmpbgp = bmp_bgp_get(bgp);
+ bmp_session_init(&bt->sessions);
+ bmp_qhash_init(&bt->updhash);
+ bmp_qlist_init(&bt->updlist);
+ bmp_actives_init(&bt->actives);
+ bmp_listeners_init(&bt->listeners);
+
+ QOBJ_REG(bt, bmp_targets);
+ bmp_targets_add(&bt->bmpbgp->targets, bt);
+ return bt;
+}
+
+static void bmp_targets_put(struct bmp_targets *bt)
+{
+ struct bmp *bmp;
+ struct bmp_active *ba;
+
+ EVENT_OFF(bt->t_stats);
+
+ frr_each_safe (bmp_actives, &bt->actives, ba)
+ bmp_active_put(ba);
+
+ frr_each_safe(bmp_session, &bt->sessions, bmp) {
+ bmp_close(bmp);
+ bmp_free(bmp);
+ }
+
+ bmp_targets_del(&bt->bmpbgp->targets, bt);
+ QOBJ_UNREG(bt);
+
+ bmp_listeners_fini(&bt->listeners);
+ bmp_actives_fini(&bt->actives);
+ bmp_qhash_fini(&bt->updhash);
+ bmp_qlist_fini(&bt->updlist);
+
+ XFREE(MTYPE_BMP_ACLNAME, bt->acl_name);
+ XFREE(MTYPE_BMP_ACLNAME, bt->acl6_name);
+ bmp_session_fini(&bt->sessions);
+
+ XFREE(MTYPE_BMP_TARGETSNAME, bt->name);
+ XFREE(MTYPE_BMP_TARGETS, bt);
+}
+
+static struct bmp_listener *bmp_listener_find(struct bmp_targets *bt,
+ const union sockunion *su,
+ int port)
+{
+ struct bmp_listener dummy;
+ dummy.addr = *su;
+ dummy.port = port;
+ return bmp_listeners_find(&bt->listeners, &dummy);
+}
+
+static struct bmp_listener *bmp_listener_get(struct bmp_targets *bt,
+ const union sockunion *su,
+ int port)
+{
+ struct bmp_listener *bl = bmp_listener_find(bt, su, port);
+
+ if (bl)
+ return bl;
+
+ bl = XCALLOC(MTYPE_BMP_LISTENER, sizeof(*bl));
+ bl->targets = bt;
+ bl->addr = *su;
+ bl->port = port;
+ bl->sock = -1;
+
+ bmp_listeners_add(&bt->listeners, bl);
+ return bl;
+}
+
+static void bmp_listener_start(struct bmp_listener *bl)
+{
+ int sock, ret;
+
+ sock = socket(bl->addr.sa.sa_family, SOCK_STREAM, 0);
+ if (sock < 0)
+ return;
+
+ sockopt_reuseaddr(sock);
+ sockopt_reuseport(sock);
+ sockopt_v6only(bl->addr.sa.sa_family, sock);
+ set_cloexec(sock);
+
+ ret = sockunion_bind(sock, &bl->addr, bl->port, &bl->addr);
+ if (ret < 0)
+ goto out_sock;
+
+ ret = listen(sock, 3);
+ if (ret < 0)
+ goto out_sock;
+
+ bl->sock = sock;
+ event_add_read(bm->master, bmp_accept, bl, sock, &bl->t_accept);
+ return;
+out_sock:
+ close(sock);
+}
+
+static void bmp_listener_stop(struct bmp_listener *bl)
+{
+ EVENT_OFF(bl->t_accept);
+
+ if (bl->sock != -1)
+ close(bl->sock);
+ bl->sock = -1;
+}
+
+static struct bmp_active *bmp_active_find(struct bmp_targets *bt,
+ const char *hostname, int port)
+{
+ struct bmp_active dummy;
+ dummy.hostname = (char *)hostname;
+ dummy.port = port;
+ return bmp_actives_find(&bt->actives, &dummy);
+}
+
+static struct bmp_active *bmp_active_get(struct bmp_targets *bt,
+ const char *hostname, int port)
+{
+ struct bmp_active *ba;
+
+ ba = bmp_active_find(bt, hostname, port);
+ if (ba)
+ return ba;
+
+ ba = XCALLOC(MTYPE_BMP_ACTIVE, sizeof(*ba));
+ ba->targets = bt;
+ ba->hostname = XSTRDUP(MTYPE_TMP, hostname);
+ ba->port = port;
+ ba->minretry = BMP_DFLT_MINRETRY;
+ ba->maxretry = BMP_DFLT_MAXRETRY;
+ ba->socket = -1;
+
+ bmp_actives_add(&bt->actives, ba);
+ return ba;
+}
+
+static void bmp_active_put(struct bmp_active *ba)
+{
+ EVENT_OFF(ba->t_timer);
+ EVENT_OFF(ba->t_read);
+ EVENT_OFF(ba->t_write);
+
+ bmp_actives_del(&ba->targets->actives, ba);
+
+ if (ba->bmp) {
+ ba->bmp->active = NULL;
+ bmp_close(ba->bmp);
+ bmp_free(ba->bmp);
+ }
+ if (ba->socket != -1)
+ close(ba->socket);
+
+ XFREE(MTYPE_TMP, ba->ifsrc);
+ XFREE(MTYPE_TMP, ba->hostname);
+ XFREE(MTYPE_BMP_ACTIVE, ba);
+}
+
+static void bmp_active_setup(struct bmp_active *ba);
+
+static void bmp_active_connect(struct bmp_active *ba)
+{
+ enum connect_result res;
+ struct interface *ifp;
+ vrf_id_t vrf_id = VRF_DEFAULT;
+ int res_bind;
+
+ for (; ba->addrpos < ba->addrtotal; ba->addrpos++) {
+ if (ba->ifsrc) {
+ if (ba->targets && ba->targets->bgp)
+ vrf_id = ba->targets->bgp->vrf_id;
+
+ /* find interface and related */
+ /* address with same family */
+ ifp = if_lookup_by_name(ba->ifsrc, vrf_id);
+ if (!ifp) {
+ zlog_warn("bmp[%s]: failed to find interface",
+ ba->ifsrc);
+ continue;
+ }
+
+ if (bgp_update_address(ifp, &ba->addrs[ba->addrpos],
+ &ba->addrsrc)){
+ zlog_warn("bmp[%s]: failed to find matching address",
+ ba->ifsrc);
+ continue;
+ }
+ zlog_info("bmp[%s]: selected source address : %pSU",
+ ba->ifsrc, &ba->addrsrc);
+ }
+
+ ba->socket = sockunion_socket(&ba->addrs[ba->addrpos]);
+ if (ba->socket < 0) {
+ zlog_warn("bmp[%s]: failed to create socket",
+ ba->hostname);
+ continue;
+ }
+
+ set_nonblocking(ba->socket);
+
+ if (!sockunion_is_null(&ba->addrsrc)) {
+ res_bind = sockunion_bind(ba->socket, &ba->addrsrc, 0,
+ &ba->addrsrc);
+ if (res_bind < 0) {
+ zlog_warn(
+ "bmp[%s]: no bind currently to source address %pSU:%d",
+ ba->hostname, &ba->addrsrc, ba->port);
+ close(ba->socket);
+ ba->socket = -1;
+ sockunion_init(&ba->addrsrc);
+ continue;
+ }
+ }
+
+
+ res = sockunion_connect(ba->socket, &ba->addrs[ba->addrpos],
+ htons(ba->port), 0);
+ switch (res) {
+ case connect_error:
+ zlog_warn("bmp[%s]: failed to connect to %pSU:%d",
+ ba->hostname, &ba->addrs[ba->addrpos],
+ ba->port);
+ close(ba->socket);
+ ba->socket = -1;
+ sockunion_init(&ba->addrsrc);
+ continue;
+ case connect_success:
+ zlog_info("bmp[%s]: connected to %pSU:%d",
+ ba->hostname, &ba->addrs[ba->addrpos],
+ ba->port);
+ break;
+ case connect_in_progress:
+ zlog_warn("bmp[%s]: connect in progress %pSU:%d",
+ ba->hostname, &ba->addrs[ba->addrpos],
+ ba->port);
+ bmp_active_setup(ba);
+ return;
+ }
+ }
+
+ /* exhausted all addresses */
+ ba->curretry += ba->curretry / 2;
+ bmp_active_setup(ba);
+}
+
+static void bmp_active_resolved(struct resolver_query *resq, const char *errstr,
+ int numaddrs, union sockunion *addr)
+{
+ struct bmp_active *ba = container_of(resq, struct bmp_active, resq);
+ unsigned i;
+
+ if (numaddrs <= 0) {
+ zlog_warn("bmp[%s]: hostname resolution failed: %s",
+ ba->hostname, errstr);
+ ba->last_err = errstr;
+ ba->curretry += ba->curretry / 2;
+ ba->addrpos = 0;
+ ba->addrtotal = 0;
+ bmp_active_setup(ba);
+ return;
+ }
+
+ if (numaddrs > (int)array_size(ba->addrs))
+ numaddrs = array_size(ba->addrs);
+
+ ba->addrpos = 0;
+ ba->addrtotal = numaddrs;
+ for (i = 0; i < ba->addrtotal; i++)
+ memcpy(&ba->addrs[i], &addr[i], sizeof(ba->addrs[0]));
+
+ bmp_active_connect(ba);
+}
+
+static void bmp_active_thread(struct event *t)
+{
+ struct bmp_active *ba = EVENT_ARG(t);
+ socklen_t slen;
+ int status, ret;
+ vrf_id_t vrf_id;
+
+ /* all 3 end up here, though only timer or read+write are active
+ * at a time */
+ EVENT_OFF(ba->t_timer);
+ EVENT_OFF(ba->t_read);
+ EVENT_OFF(ba->t_write);
+
+ ba->last_err = NULL;
+
+ if (ba->socket == -1) {
+ /* get vrf_id */
+ if (!ba->targets || !ba->targets->bgp)
+ vrf_id = VRF_DEFAULT;
+ else
+ vrf_id = ba->targets->bgp->vrf_id;
+ resolver_resolve(&ba->resq, AF_UNSPEC, vrf_id, ba->hostname,
+ bmp_active_resolved);
+ return;
+ }
+
+ slen = sizeof(status);
+ ret = getsockopt(ba->socket, SOL_SOCKET, SO_ERROR, (void *)&status,
+ &slen);
+
+ if (ret < 0 || status != 0) {
+ ba->last_err = strerror(status);
+ zlog_warn("bmp[%s]: failed to connect to %pSU:%d: %s",
+ ba->hostname, &ba->addrs[ba->addrpos], ba->port,
+ ba->last_err);
+ goto out_next;
+ }
+
+ zlog_warn("bmp[%s]: outbound connection to %pSU:%d", ba->hostname,
+ &ba->addrs[ba->addrpos], ba->port);
+
+ ba->bmp = bmp_open(ba->targets, ba->socket);
+ if (!ba->bmp)
+ goto out_next;
+
+ ba->bmp->active = ba;
+ ba->socket = -1;
+ ba->curretry = ba->minretry;
+ return;
+
+out_next:
+ close(ba->socket);
+ ba->socket = -1;
+ ba->addrpos++;
+ bmp_active_connect(ba);
+}
+
+static void bmp_active_disconnected(struct bmp_active *ba)
+{
+ ba->bmp = NULL;
+ bmp_active_setup(ba);
+}
+
+static void bmp_active_setup(struct bmp_active *ba)
+{
+ EVENT_OFF(ba->t_timer);
+ EVENT_OFF(ba->t_read);
+ EVENT_OFF(ba->t_write);
+
+ if (ba->bmp)
+ return;
+ if (ba->resq.callback)
+ return;
+
+ if (ba->curretry > ba->maxretry)
+ ba->curretry = ba->maxretry;
+
+ if (ba->socket == -1)
+ event_add_timer_msec(bm->master, bmp_active_thread, ba,
+ ba->curretry, &ba->t_timer);
+ else {
+ event_add_read(bm->master, bmp_active_thread, ba, ba->socket,
+ &ba->t_read);
+ event_add_write(bm->master, bmp_active_thread, ba, ba->socket,
+ &ba->t_write);
+ }
+}
+
+static struct cmd_node bmp_node = {
+ .name = "bmp",
+ .node = BMP_NODE,
+ .parent_node = BGP_NODE,
+ .prompt = "%s(config-bgp-bmp)# "
+};
+
+static void bmp_targets_autocomplete(vector comps, struct cmd_token *token)
+{
+ struct bgp *bgp;
+ struct bmp_targets *target;
+ struct listnode *node;
+
+ for (ALL_LIST_ELEMENTS_RO(bm->bgp, node, bgp)) {
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(bgp);
+
+ if (!bmpbgp)
+ continue;
+
+ frr_each_safe (bmp_targets, &bmpbgp->targets, target)
+ vector_set(comps,
+ XSTRDUP(MTYPE_COMPLETION, target->name));
+ }
+}
+
+static const struct cmd_variable_handler bmp_targets_var_handlers[] = {
+ {.tokenname = "BMPTARGETS", .completions = bmp_targets_autocomplete},
+ {.completions = NULL}};
+
+#define BMP_STR "BGP Monitoring Protocol\n"
+
+#include "bgpd/bgp_bmp_clippy.c"
+
+DEFPY_NOSH(bmp_targets_main,
+ bmp_targets_cmd,
+ "bmp targets BMPTARGETS",
+ BMP_STR
+ "Create BMP target group\n"
+ "Name of the BMP target group\n")
+{
+ VTY_DECLVAR_CONTEXT(bgp, bgp);
+ struct bmp_targets *bt;
+
+ bt = bmp_targets_get(bgp, bmptargets);
+
+ VTY_PUSH_CONTEXT_SUB(BMP_NODE, bt);
+ return CMD_SUCCESS;
+}
+
+DEFPY(no_bmp_targets_main,
+ no_bmp_targets_cmd,
+ "no bmp targets BMPTARGETS",
+ NO_STR
+ BMP_STR
+ "Delete BMP target group\n"
+ "Name of the BMP target group\n")
+{
+ VTY_DECLVAR_CONTEXT(bgp, bgp);
+ struct bmp_targets *bt;
+
+ bt = bmp_targets_find1(bgp, bmptargets);
+ if (!bt) {
+ vty_out(vty, "%% BMP target group not found\n");
+ return CMD_WARNING;
+ }
+ bmp_targets_put(bt);
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_listener_main,
+ bmp_listener_cmd,
+ "bmp listener <X:X::X:X|A.B.C.D> port (1-65535)",
+ BMP_STR
+ "Listen for inbound BMP connections\n"
+ "IPv6 address to listen on\n"
+ "IPv4 address to listen on\n"
+ "TCP Port number\n"
+ "TCP Port number\n")
+{
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+ struct bmp_listener *bl;
+
+ bl = bmp_listener_get(bt, listener, port);
+ if (bl->sock == -1)
+ bmp_listener_start(bl);
+
+ return CMD_SUCCESS;
+}
+
+DEFPY(no_bmp_listener_main,
+ no_bmp_listener_cmd,
+ "no bmp listener <X:X::X:X|A.B.C.D> port (1-65535)",
+ NO_STR
+ BMP_STR
+ "Create BMP listener\n"
+ "IPv6 address to listen on\n"
+ "IPv4 address to listen on\n"
+ "TCP Port number\n"
+ "TCP Port number\n")
+{
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+ struct bmp_listener *bl;
+
+ bl = bmp_listener_find(bt, listener, port);
+ if (!bl) {
+ vty_out(vty, "%% BMP listener not found\n");
+ return CMD_WARNING;
+ }
+ bmp_listener_stop(bl);
+ bmp_listener_put(bl);
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_connect,
+ bmp_connect_cmd,
+ "[no] bmp connect HOSTNAME port (1-65535) {min-retry (100-86400000)|max-retry (100-86400000)} [source-interface <WORD$srcif>]",
+ NO_STR
+ BMP_STR
+ "Actively establish connection to monitoring station\n"
+ "Monitoring station hostname or address\n"
+ "TCP port\n"
+ "TCP port\n"
+ "Minimum connection retry interval\n"
+ "Minimum connection retry interval (milliseconds)\n"
+ "Maximum connection retry interval\n"
+ "Maximum connection retry interval (milliseconds)\n"
+ "Source interface to use\n"
+ "Define an interface\n")
+{
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+ struct bmp_active *ba;
+
+ if (no) {
+ ba = bmp_active_find(bt, hostname, port);
+ if (!ba) {
+ vty_out(vty, "%% No such active connection found\n");
+ return CMD_WARNING;
+ }
+ /* connection deletion need same hostname port and interface */
+ if (ba->ifsrc || srcif)
+ if ((!ba->ifsrc) || (!srcif) ||
+ !strcmp(ba->ifsrc, srcif)) {
+ vty_out(vty,
+ "%% No such active connection found\n");
+ return CMD_WARNING;
+ }
+ bmp_active_put(ba);
+ return CMD_SUCCESS;
+ }
+
+ ba = bmp_active_get(bt, hostname, port);
+ if (srcif)
+ ba->ifsrc = XSTRDUP(MTYPE_TMP, srcif);
+ if (min_retry_str)
+ ba->minretry = min_retry;
+ if (max_retry_str)
+ ba->maxretry = max_retry;
+ ba->curretry = ba->minretry;
+ bmp_active_setup(ba);
+
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_acl,
+ bmp_acl_cmd,
+ "[no] <ip|ipv6>$af access-list ACCESSLIST_NAME$access_list",
+ NO_STR
+ IP_STR
+ IPV6_STR
+ "Access list to restrict BMP sessions\n"
+ "Access list name\n")
+{
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+ char **what;
+
+ if (no)
+ access_list = NULL;
+ if (!strcmp(af, "ipv6"))
+ what = &bt->acl6_name;
+ else
+ what = &bt->acl_name;
+
+ XFREE(MTYPE_BMP_ACLNAME, *what);
+ if (access_list)
+ *what = XSTRDUP(MTYPE_BMP_ACLNAME, access_list);
+
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_stats_cfg,
+ bmp_stats_cmd,
+ "[no] bmp stats [interval (100-86400000)]",
+ NO_STR
+ BMP_STR
+ "Send BMP statistics messages\n"
+ "Specify BMP stats interval\n"
+ "Interval (milliseconds) to send BMP Stats in\n")
+{
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+
+ EVENT_OFF(bt->t_stats);
+ if (no)
+ bt->stat_msec = 0;
+ else if (interval_str)
+ bt->stat_msec = interval;
+ else
+ bt->stat_msec = BMP_STAT_DEFAULT_TIMER;
+
+ if (bt->stat_msec)
+ event_add_timer_msec(bm->master, bmp_stats, bt, bt->stat_msec,
+ &bt->t_stats);
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_monitor_cfg,
+ bmp_monitor_cmd,
+ "[no] bmp monitor <ipv4|ipv6|l2vpn> <unicast|multicast|evpn|vpn> <pre-policy|post-policy>$policy",
+ NO_STR
+ BMP_STR
+ "Send BMP route monitoring messages\n"
+ BGP_AF_STR
+ BGP_AF_STR
+ BGP_AF_STR
+ BGP_AF_STR
+ BGP_AF_STR
+ BGP_AF_STR
+ BGP_AF_STR
+ "Send state before policy and filter processing\n"
+ "Send state with policy and filters applied\n")
+{
+ int index = 0;
+ uint8_t flag, prev;
+ afi_t afi;
+ safi_t safi;
+
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+ struct bmp *bmp;
+
+ argv_find_and_parse_afi(argv, argc, &index, &afi);
+ argv_find_and_parse_safi(argv, argc, &index, &safi);
+
+ if (policy[1] == 'r')
+ flag = BMP_MON_PREPOLICY;
+ else
+ flag = BMP_MON_POSTPOLICY;
+
+ prev = bt->afimon[afi][safi];
+ if (no)
+ bt->afimon[afi][safi] &= ~flag;
+ else
+ bt->afimon[afi][safi] |= flag;
+
+ if (prev == bt->afimon[afi][safi])
+ return CMD_SUCCESS;
+
+ frr_each (bmp_session, &bt->sessions, bmp) {
+ if (bmp->syncafi == afi && bmp->syncsafi == safi) {
+ bmp->syncafi = AFI_MAX;
+ bmp->syncsafi = SAFI_MAX;
+ }
+
+ if (!bt->afimon[afi][safi]) {
+ bmp->afistate[afi][safi] = BMP_AFI_INACTIVE;
+ continue;
+ }
+
+ bmp->afistate[afi][safi] = BMP_AFI_NEEDSYNC;
+ }
+
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_mirror_cfg,
+ bmp_mirror_cmd,
+ "[no] bmp mirror",
+ NO_STR
+ BMP_STR
+ "Send BMP route mirroring messages\n")
+{
+ VTY_DECLVAR_CONTEXT_SUB(bmp_targets, bt);
+ struct bmp *bmp;
+
+ if (bt->mirror == !no)
+ return CMD_SUCCESS;
+
+ bt->mirror = !no;
+ if (bt->mirror)
+ return CMD_SUCCESS;
+
+ frr_each (bmp_session, &bt->sessions, bmp) {
+ struct bmp_mirrorq *bmq;
+
+ while ((bmq = bmp_pull_mirror(bmp)))
+ if (!bmq->refcount)
+ XFREE(MTYPE_BMP_MIRRORQ, bmq);
+ }
+ return CMD_SUCCESS;
+}
+
+DEFPY(bmp_mirror_limit_cfg,
+ bmp_mirror_limit_cmd,
+ "bmp mirror buffer-limit (0-4294967294)",
+ BMP_STR
+ "Route Mirroring settings\n"
+ "Configure maximum memory used for buffered mirroring messages\n"
+ "Limit in bytes\n")
+{
+ VTY_DECLVAR_CONTEXT(bgp, bgp);
+ struct bmp_bgp *bmpbgp;
+
+ bmpbgp = bmp_bgp_get(bgp);
+ bmpbgp->mirror_qsizelimit = buffer_limit;
+
+ return CMD_SUCCESS;
+}
+
+DEFPY(no_bmp_mirror_limit_cfg,
+ no_bmp_mirror_limit_cmd,
+ "no bmp mirror buffer-limit [(0-4294967294)]",
+ NO_STR
+ BMP_STR
+ "Route Mirroring settings\n"
+ "Configure maximum memory used for buffered mirroring messages\n"
+ "Limit in bytes\n")
+{
+ VTY_DECLVAR_CONTEXT(bgp, bgp);
+ struct bmp_bgp *bmpbgp;
+
+ bmpbgp = bmp_bgp_get(bgp);
+ bmpbgp->mirror_qsizelimit = ~0UL;
+
+ return CMD_SUCCESS;
+}
+
+
+DEFPY(show_bmp,
+ show_bmp_cmd,
+ "show bmp",
+ SHOW_STR
+ BMP_STR)
+{
+ struct bmp_bgp *bmpbgp;
+ struct bmp_targets *bt;
+ struct bmp_listener *bl;
+ struct bmp_active *ba;
+ struct bmp *bmp;
+ struct ttable *tt;
+ char uptime[BGP_UPTIME_LEN];
+ char *out;
+
+ frr_each(bmp_bgph, &bmp_bgph, bmpbgp) {
+ vty_out(vty, "BMP state for BGP %s:\n\n",
+ bmpbgp->bgp->name_pretty);
+ vty_out(vty, " Route Mirroring %9zu bytes (%zu messages) pending\n",
+ bmpbgp->mirror_qsize,
+ bmp_mirrorq_count(&bmpbgp->mirrorq));
+ vty_out(vty, " %9zu bytes maximum buffer used\n",
+ bmpbgp->mirror_qsizemax);
+ if (bmpbgp->mirror_qsizelimit != ~0UL)
+ vty_out(vty, " %9zu bytes buffer size limit\n",
+ bmpbgp->mirror_qsizelimit);
+ vty_out(vty, "\n");
+
+ frr_each(bmp_targets, &bmpbgp->targets, bt) {
+ vty_out(vty, " Targets \"%s\":\n", bt->name);
+ vty_out(vty, " Route Mirroring %sabled\n",
+ bt->mirror ? "en" : "dis");
+
+ afi_t afi;
+ safi_t safi;
+
+ FOREACH_AFI_SAFI (afi, safi) {
+ const char *str = NULL;
+
+ switch (bt->afimon[afi][safi]) {
+ case BMP_MON_PREPOLICY:
+ str = "pre-policy";
+ break;
+ case BMP_MON_POSTPOLICY:
+ str = "post-policy";
+ break;
+ case BMP_MON_PREPOLICY | BMP_MON_POSTPOLICY:
+ str = "pre-policy and post-policy";
+ break;
+ }
+ if (!str)
+ continue;
+ vty_out(vty, " Route Monitoring %s %s %s\n",
+ afi2str(afi), safi2str(safi), str);
+ }
+
+ vty_out(vty, " Listeners:\n");
+ frr_each (bmp_listeners, &bt->listeners, bl)
+ vty_out(vty, " %pSU:%d\n", &bl->addr,
+ bl->port);
+
+ vty_out(vty, "\n Outbound connections:\n");
+ tt = ttable_new(&ttable_styles[TTSTYLE_BLANK]);
+ ttable_add_row(tt, "remote|state||timer|local");
+ ttable_rowseps(tt, 0, BOTTOM, true, '-');
+ frr_each (bmp_actives, &bt->actives, ba) {
+ const char *state_str = "?";
+
+ if (ba->bmp) {
+ peer_uptime(ba->bmp->t_up.tv_sec,
+ uptime, sizeof(uptime),
+ false, NULL);
+ ttable_add_row(tt,
+ "%s:%d|Up|%s|%s|%pSU",
+ ba->hostname, ba->port,
+ ba->bmp->remote, uptime,
+ &ba->addrsrc);
+ continue;
+ }
+
+ uptime[0] = '\0';
+
+ if (ba->t_timer) {
+ long trem = event_timer_remain_second(
+ ba->t_timer);
+
+ peer_uptime(monotime(NULL) - trem,
+ uptime, sizeof(uptime),
+ false, NULL);
+ state_str = "RetryWait";
+ } else if (ba->t_read) {
+ state_str = "Connecting";
+ } else if (ba->resq.callback) {
+ state_str = "Resolving";
+ }
+
+ ttable_add_row(tt, "%s:%d|%s|%s|%s|%pSU",
+ ba->hostname, ba->port,
+ state_str,
+ ba->last_err ? ba->last_err : "",
+ uptime, &ba->addrsrc);
+ continue;
+ }
+ out = ttable_dump(tt, "\n");
+ vty_out(vty, "%s", out);
+ XFREE(MTYPE_TMP, out);
+ ttable_del(tt);
+
+ vty_out(vty, "\n %zu connected clients:\n",
+ bmp_session_count(&bt->sessions));
+ tt = ttable_new(&ttable_styles[TTSTYLE_BLANK]);
+ ttable_add_row(tt, "remote|uptime|MonSent|MirrSent|MirrLost|ByteSent|ByteQ|ByteQKernel");
+ ttable_rowseps(tt, 0, BOTTOM, true, '-');
+
+ frr_each (bmp_session, &bt->sessions, bmp) {
+ uint64_t total;
+ size_t q, kq;
+
+ pullwr_stats(bmp->pullwr, &total, &q, &kq);
+
+ peer_uptime(bmp->t_up.tv_sec, uptime,
+ sizeof(uptime), false, NULL);
+
+ ttable_add_row(tt, "%s|%s|%Lu|%Lu|%Lu|%Lu|%zu|%zu",
+ bmp->remote, uptime,
+ bmp->cnt_update,
+ bmp->cnt_mirror,
+ bmp->cnt_mirror_overruns,
+ total, q, kq);
+ }
+ out = ttable_dump(tt, "\n");
+ vty_out(vty, "%s", out);
+ XFREE(MTYPE_TMP, out);
+ ttable_del(tt);
+ vty_out(vty, "\n");
+ }
+ }
+
+ return CMD_SUCCESS;
+}
+
+static int bmp_config_write(struct bgp *bgp, struct vty *vty)
+{
+ struct bmp_bgp *bmpbgp = bmp_bgp_find(bgp);
+ struct bmp_targets *bt;
+ struct bmp_listener *bl;
+ struct bmp_active *ba;
+ afi_t afi;
+ safi_t safi;
+
+ if (!bmpbgp)
+ return 0;
+
+ if (bmpbgp->mirror_qsizelimit != ~0UL)
+ vty_out(vty, " !\n bmp mirror buffer-limit %zu\n",
+ bmpbgp->mirror_qsizelimit);
+
+ frr_each(bmp_targets, &bmpbgp->targets, bt) {
+ vty_out(vty, " !\n bmp targets %s\n", bt->name);
+
+ if (bt->acl6_name)
+ vty_out(vty, " ipv6 access-list %s\n", bt->acl6_name);
+ if (bt->acl_name)
+ vty_out(vty, " ip access-list %s\n", bt->acl_name);
+
+ if (bt->stat_msec)
+ vty_out(vty, " bmp stats interval %d\n",
+ bt->stat_msec);
+
+ if (bt->mirror)
+ vty_out(vty, " bmp mirror\n");
+
+ FOREACH_AFI_SAFI (afi, safi) {
+ if (bt->afimon[afi][safi] & BMP_MON_PREPOLICY)
+ vty_out(vty, " bmp monitor %s %s pre-policy\n",
+ afi2str_lower(afi), safi2str(safi));
+ if (bt->afimon[afi][safi] & BMP_MON_POSTPOLICY)
+ vty_out(vty,
+ " bmp monitor %s %s post-policy\n",
+ afi2str_lower(afi), safi2str(safi));
+ }
+ frr_each (bmp_listeners, &bt->listeners, bl)
+ vty_out(vty, " \n bmp listener %pSU port %d\n",
+ &bl->addr, bl->port);
+
+ frr_each (bmp_actives, &bt->actives, ba) {
+ vty_out(vty, " bmp connect %s port %u min-retry %u max-retry %u",
+ ba->hostname, ba->port,
+ ba->minretry, ba->maxretry);
+
+ if (ba->ifsrc)
+ vty_out(vty, " source-interface %s\n", ba->ifsrc);
+ else
+ vty_out(vty, "\n");
+ }
+ vty_out(vty, " exit\n");
+ }
+
+ return 0;
+}
+
+static int bgp_bmp_init(struct event_loop *tm)
+{
+ install_node(&bmp_node);
+ install_default(BMP_NODE);
+
+ cmd_variable_handler_register(bmp_targets_var_handlers);
+
+ install_element(BGP_NODE, &bmp_targets_cmd);
+ install_element(BGP_NODE, &no_bmp_targets_cmd);
+
+ install_element(BMP_NODE, &bmp_listener_cmd);
+ install_element(BMP_NODE, &no_bmp_listener_cmd);
+ install_element(BMP_NODE, &bmp_connect_cmd);
+ install_element(BMP_NODE, &bmp_acl_cmd);
+ install_element(BMP_NODE, &bmp_stats_cmd);
+ install_element(BMP_NODE, &bmp_monitor_cmd);
+ install_element(BMP_NODE, &bmp_mirror_cmd);
+
+ install_element(BGP_NODE, &bmp_mirror_limit_cmd);
+ install_element(BGP_NODE, &no_bmp_mirror_limit_cmd);
+
+ install_element(VIEW_NODE, &show_bmp_cmd);
+
+ resolver_init(tm);
+ return 0;
+}
+
+static int bgp_bmp_module_init(void)
+{
+ hook_register(bgp_packet_dump, bmp_mirror_packet);
+ hook_register(bgp_packet_send, bmp_outgoing_packet);
+ hook_register(peer_status_changed, bmp_peer_status_changed);
+ hook_register(peer_backward_transition, bmp_peer_backward);
+ hook_register(bgp_process, bmp_process);
+ hook_register(bgp_inst_config_write, bmp_config_write);
+ hook_register(bgp_inst_delete, bmp_bgp_del);
+ hook_register(frr_late_init, bgp_bmp_init);
+ return 0;
+}
+
+FRR_MODULE_SETUP(.name = "bgpd_bmp", .version = FRR_VERSION,
+ .description = "bgpd BMP module",
+ .init = bgp_bmp_module_init,
+);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 11:02:34 +0000