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/* $OpenBSD: lde.c,v 1.73 2017/03/04 00:15:35 renato Exp $ */ |
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/* |
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* Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org> |
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* Copyright (c) 2004, 2005 Claudio Jeker <claudio@openbsd.org> |
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* Copyright (c) 2004 Esben Norby <norby@openbsd.org> |
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* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/time.h> |
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#include <sys/socket.h> |
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#include <netinet/in.h> |
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#include <netmpls/mpls.h> |
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#include <arpa/inet.h> |
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#include <errno.h> |
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#include <stdlib.h> |
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#include <signal.h> |
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#include <string.h> |
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#include <pwd.h> |
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#include <unistd.h> |
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#include <limits.h> |
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#include "ldp.h" |
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#include "ldpd.h" |
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#include "ldpe.h" |
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#include "log.h" |
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#include "lde.h" |
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static void lde_sig_handler(int sig, short, void *); |
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static __dead void lde_shutdown(void); |
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static int lde_imsg_compose_parent(int, pid_t, void *, uint16_t); |
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static void lde_dispatch_imsg(int, short, void *); |
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static void lde_dispatch_parent(int, short, void *); |
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static __inline int lde_nbr_compare(struct lde_nbr *, |
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struct lde_nbr *); |
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static struct lde_nbr *lde_nbr_new(uint32_t, struct lde_nbr *); |
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static void lde_nbr_del(struct lde_nbr *); |
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static struct lde_nbr *lde_nbr_find(uint32_t); |
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static void lde_nbr_clear(void); |
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static void lde_nbr_addr_update(struct lde_nbr *, |
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struct lde_addr *, int); |
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static void lde_map_free(void *); |
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static int lde_address_add(struct lde_nbr *, struct lde_addr *); |
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static int lde_address_del(struct lde_nbr *, struct lde_addr *); |
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static void lde_address_list_free(struct lde_nbr *); |
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RB_GENERATE(nbr_tree, lde_nbr, entry, lde_nbr_compare) |
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struct ldpd_conf *ldeconf; |
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struct nbr_tree lde_nbrs = RB_INITIALIZER(&lde_nbrs); |
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static struct imsgev *iev_ldpe; |
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static struct imsgev *iev_main; |
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/* ARGSUSED */ |
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static void |
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lde_sig_handler(int sig, short event, void *arg) |
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{ |
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/* |
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* signal handler rules don't apply, libevent decouples for us |
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*/ |
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switch (sig) { |
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case SIGINT: |
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case SIGTERM: |
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lde_shutdown(); |
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/* NOTREACHED */ |
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default: |
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fatalx("unexpected signal"); |
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} |
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} |
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/* label decision engine */ |
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void |
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lde(int debug, int verbose) |
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{ |
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struct event ev_sigint, ev_sigterm; |
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struct timeval now; |
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struct passwd *pw; |
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ldeconf = config_new_empty(); |
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log_init(debug); |
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log_verbose(verbose); |
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setproctitle("label decision engine"); |
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ldpd_process = PROC_LDE_ENGINE; |
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log_procname = log_procnames[PROC_LDE_ENGINE]; |
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if ((pw = getpwnam(LDPD_USER)) == NULL) |
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fatal("getpwnam"); |
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if (chroot(pw->pw_dir) == -1) |
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fatal("chroot"); |
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if (chdir("/") == -1) |
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fatal("chdir(\"/\")"); |
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if (setgroups(1, &pw->pw_gid) || |
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setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) || |
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setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid)) |
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fatal("can't drop privileges"); |
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if (pledge("stdio recvfd flock rpath cpath wpath", NULL) == -1) |
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fatal("pledge"); |
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event_init(); |
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/* setup signal handler */ |
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signal_set(&ev_sigint, SIGINT, lde_sig_handler, NULL); |
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signal_set(&ev_sigterm, SIGTERM, lde_sig_handler, NULL); |
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signal_add(&ev_sigint, NULL); |
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signal_add(&ev_sigterm, NULL); |
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signal(SIGPIPE, SIG_IGN); |
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signal(SIGHUP, SIG_IGN); |
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/* setup pipe and event handler to the parent process */ |
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if ((iev_main = malloc(sizeof(struct imsgev))) == NULL) |
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fatal(NULL); |
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imsg_init(&iev_main->ibuf, 3); |
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iev_main->handler = lde_dispatch_parent; |
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iev_main->events = EV_READ; |
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event_set(&iev_main->ev, iev_main->ibuf.fd, iev_main->events, |
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iev_main->handler, iev_main); |
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event_add(&iev_main->ev, NULL); |
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/* setup and start the LIB garbage collector */ |
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evtimer_set(&gc_timer, lde_gc_timer, NULL); |
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lde_gc_start_timer(); |
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gettimeofday(&now, NULL); |
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global.uptime = now.tv_sec; |
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event_dispatch(); |
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lde_shutdown(); |
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} |
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static __dead void |
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lde_shutdown(void) |
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{ |
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/* close pipes */ |
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msgbuf_clear(&iev_ldpe->ibuf.w); |
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close(iev_ldpe->ibuf.fd); |
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msgbuf_clear(&iev_main->ibuf.w); |
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close(iev_main->ibuf.fd); |
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lde_gc_stop_timer(); |
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lde_nbr_clear(); |
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fec_tree_clear(); |
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config_clear(ldeconf); |
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free(iev_ldpe); |
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free(iev_main); |
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log_info("label decision engine exiting"); |
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exit(0); |
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} |
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/* imesg */ |
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static int |
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lde_imsg_compose_parent(int type, pid_t pid, void *data, uint16_t datalen) |
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{ |
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return (imsg_compose_event(iev_main, type, 0, pid, -1, data, datalen)); |
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} |
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int |
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lde_imsg_compose_ldpe(int type, uint32_t peerid, pid_t pid, void *data, |
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uint16_t datalen) |
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{ |
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return (imsg_compose_event(iev_ldpe, type, peerid, pid, |
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-1, data, datalen)); |
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} |
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/* ARGSUSED */ |
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static void |
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lde_dispatch_imsg(int fd, short event, void *bula) |
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{ |
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struct imsgev *iev = bula; |
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struct imsgbuf *ibuf = &iev->ibuf; |
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struct imsg imsg; |
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struct lde_nbr *ln; |
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struct map map; |
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struct lde_addr lde_addr; |
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struct notify_msg nm; |
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ssize_t n; |
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int shut = 0, verbose; |
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if (event & EV_READ) { |
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if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) |
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fatal("imsg_read error"); |
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if (n == 0) /* connection closed */ |
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shut = 1; |
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} |
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if (event & EV_WRITE) { |
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if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) |
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fatal("msgbuf_write"); |
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if (n == 0) /* connection closed */ |
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shut = 1; |
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} |
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for (;;) { |
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if ((n = imsg_get(ibuf, &imsg)) == -1) |
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fatal("lde_dispatch_imsg: imsg_get error"); |
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if (n == 0) |
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break; |
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switch (imsg.hdr.type) { |
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case IMSG_LABEL_MAPPING_FULL: |
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ln = lde_nbr_find(imsg.hdr.peerid); |
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if (ln == NULL) { |
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log_debug("%s: cannot find lde neighbor", |
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__func__); |
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break; |
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} |
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fec_snap(ln); |
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break; |
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case IMSG_LABEL_MAPPING: |
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case IMSG_LABEL_REQUEST: |
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case IMSG_LABEL_RELEASE: |
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case IMSG_LABEL_WITHDRAW: |
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case IMSG_LABEL_ABORT: |
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if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(map)) |
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fatalx("lde_dispatch_imsg: wrong imsg len"); |
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memcpy(&map, imsg.data, sizeof(map)); |
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ln = lde_nbr_find(imsg.hdr.peerid); |
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if (ln == NULL) { |
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log_debug("%s: cannot find lde neighbor", |
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__func__); |
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break; |
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} |
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switch (imsg.hdr.type) { |
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case IMSG_LABEL_MAPPING: |
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lde_check_mapping(&map, ln); |
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break; |
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case IMSG_LABEL_REQUEST: |
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lde_check_request(&map, ln); |
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break; |
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case IMSG_LABEL_RELEASE: |
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lde_check_release(&map, ln); |
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break; |
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case IMSG_LABEL_WITHDRAW: |
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lde_check_withdraw(&map, ln); |
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break; |
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case IMSG_LABEL_ABORT: |
262 |
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/* not necessary */ |
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break; |
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} |
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break; |
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case IMSG_ADDRESS_ADD: |
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if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(lde_addr)) |
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fatalx("lde_dispatch_imsg: wrong imsg len"); |
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memcpy(&lde_addr, imsg.data, sizeof(lde_addr)); |
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271 |
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ln = lde_nbr_find(imsg.hdr.peerid); |
272 |
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if (ln == NULL) { |
273 |
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log_debug("%s: cannot find lde neighbor", |
274 |
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__func__); |
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break; |
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} |
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if (lde_address_add(ln, &lde_addr) < 0) { |
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log_debug("%s: cannot add address %s, it " |
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"already exists", __func__, |
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log_addr(lde_addr.af, &lde_addr.addr)); |
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} |
282 |
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break; |
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case IMSG_ADDRESS_DEL: |
284 |
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if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(lde_addr)) |
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fatalx("lde_dispatch_imsg: wrong imsg len"); |
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memcpy(&lde_addr, imsg.data, sizeof(lde_addr)); |
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288 |
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ln = lde_nbr_find(imsg.hdr.peerid); |
289 |
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if (ln == NULL) { |
290 |
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log_debug("%s: cannot find lde neighbor", |
291 |
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__func__); |
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break; |
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} |
294 |
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if (lde_address_del(ln, &lde_addr) < 0) { |
295 |
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log_debug("%s: cannot delete address %s, it " |
296 |
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"does not exist", __func__, |
297 |
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log_addr(lde_addr.af, &lde_addr.addr)); |
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} |
299 |
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break; |
300 |
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case IMSG_NOTIFICATION: |
301 |
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if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(nm)) |
302 |
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fatalx("lde_dispatch_imsg: wrong imsg len"); |
303 |
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memcpy(&nm, imsg.data, sizeof(nm)); |
304 |
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305 |
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ln = lde_nbr_find(imsg.hdr.peerid); |
306 |
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if (ln == NULL) { |
307 |
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log_debug("%s: cannot find lde neighbor", |
308 |
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__func__); |
309 |
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break; |
310 |
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} |
311 |
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312 |
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switch (nm.status_code) { |
313 |
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case S_PW_STATUS: |
314 |
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l2vpn_recv_pw_status(ln, &nm); |
315 |
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break; |
316 |
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case S_ENDOFLIB: |
317 |
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/* |
318 |
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* Do nothing for now. Should be useful in |
319 |
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* the future when we implement LDP-IGP |
320 |
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* Synchronization (RFC 5443) and Graceful |
321 |
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* Restart (RFC 3478). |
322 |
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*/ |
323 |
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default: |
324 |
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break; |
325 |
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} |
326 |
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break; |
327 |
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case IMSG_NEIGHBOR_UP: |
328 |
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if (imsg.hdr.len - IMSG_HEADER_SIZE != |
329 |
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sizeof(struct lde_nbr)) |
330 |
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fatalx("lde_dispatch_imsg: wrong imsg len"); |
331 |
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332 |
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if (lde_nbr_find(imsg.hdr.peerid)) |
333 |
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fatalx("lde_dispatch_imsg: " |
334 |
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"neighbor already exists"); |
335 |
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lde_nbr_new(imsg.hdr.peerid, imsg.data); |
336 |
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break; |
337 |
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case IMSG_NEIGHBOR_DOWN: |
338 |
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lde_nbr_del(lde_nbr_find(imsg.hdr.peerid)); |
339 |
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break; |
340 |
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case IMSG_CTL_SHOW_LIB: |
341 |
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rt_dump(imsg.hdr.pid); |
342 |
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343 |
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lde_imsg_compose_ldpe(IMSG_CTL_END, 0, |
344 |
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imsg.hdr.pid, NULL, 0); |
345 |
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break; |
346 |
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case IMSG_CTL_SHOW_L2VPN_PW: |
347 |
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l2vpn_pw_ctl(imsg.hdr.pid); |
348 |
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349 |
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lde_imsg_compose_ldpe(IMSG_CTL_END, 0, |
350 |
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imsg.hdr.pid, NULL, 0); |
351 |
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break; |
352 |
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case IMSG_CTL_SHOW_L2VPN_BINDING: |
353 |
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l2vpn_binding_ctl(imsg.hdr.pid); |
354 |
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355 |
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lde_imsg_compose_ldpe(IMSG_CTL_END, 0, |
356 |
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imsg.hdr.pid, NULL, 0); |
357 |
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break; |
358 |
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case IMSG_CTL_LOG_VERBOSE: |
359 |
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/* already checked by ldpe */ |
360 |
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memcpy(&verbose, imsg.data, sizeof(verbose)); |
361 |
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log_verbose(verbose); |
362 |
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break; |
363 |
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default: |
364 |
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log_debug("%s: unexpected imsg %d", __func__, |
365 |
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imsg.hdr.type); |
366 |
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break; |
367 |
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} |
368 |
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imsg_free(&imsg); |
369 |
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} |
370 |
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if (!shut) |
371 |
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imsg_event_add(iev); |
372 |
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else { |
373 |
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/* this pipe is dead, so remove the event handler */ |
374 |
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event_del(&iev->ev); |
375 |
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event_loopexit(NULL); |
376 |
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} |
377 |
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} |
378 |
|
|
|
379 |
|
|
/* ARGSUSED */ |
380 |
|
|
static void |
381 |
|
|
lde_dispatch_parent(int fd, short event, void *bula) |
382 |
|
|
{ |
383 |
|
|
static struct ldpd_conf *nconf; |
384 |
|
|
struct iface *niface; |
385 |
|
|
struct tnbr *ntnbr; |
386 |
|
|
struct nbr_params *nnbrp; |
387 |
|
|
static struct l2vpn *nl2vpn; |
388 |
|
|
struct l2vpn_if *nlif; |
389 |
|
|
struct l2vpn_pw *npw; |
390 |
|
|
struct imsg imsg; |
391 |
|
|
struct kroute kr; |
392 |
|
|
struct imsgev *iev = bula; |
393 |
|
|
struct imsgbuf *ibuf = &iev->ibuf; |
394 |
|
|
ssize_t n; |
395 |
|
|
int shut = 0; |
396 |
|
|
struct fec fec; |
397 |
|
|
|
398 |
|
|
if (event & EV_READ) { |
399 |
|
|
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) |
400 |
|
|
fatal("imsg_read error"); |
401 |
|
|
if (n == 0) /* connection closed */ |
402 |
|
|
shut = 1; |
403 |
|
|
} |
404 |
|
|
if (event & EV_WRITE) { |
405 |
|
|
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN) |
406 |
|
|
fatal("msgbuf_write"); |
407 |
|
|
if (n == 0) /* connection closed */ |
408 |
|
|
shut = 1; |
409 |
|
|
} |
410 |
|
|
|
411 |
|
|
for (;;) { |
412 |
|
|
if ((n = imsg_get(ibuf, &imsg)) == -1) |
413 |
|
|
fatal("lde_dispatch_parent: imsg_get error"); |
414 |
|
|
if (n == 0) |
415 |
|
|
break; |
416 |
|
|
|
417 |
|
|
switch (imsg.hdr.type) { |
418 |
|
|
case IMSG_NETWORK_ADD: |
419 |
|
|
case IMSG_NETWORK_DEL: |
420 |
|
|
if (imsg.hdr.len != IMSG_HEADER_SIZE + sizeof(kr)) { |
421 |
|
|
log_warnx("%s: wrong imsg len", __func__); |
422 |
|
|
break; |
423 |
|
|
} |
424 |
|
|
memcpy(&kr, imsg.data, sizeof(kr)); |
425 |
|
|
|
426 |
|
|
switch (kr.af) { |
427 |
|
|
case AF_INET: |
428 |
|
|
fec.type = FEC_TYPE_IPV4; |
429 |
|
|
fec.u.ipv4.prefix = kr.prefix.v4; |
430 |
|
|
fec.u.ipv4.prefixlen = kr.prefixlen; |
431 |
|
|
break; |
432 |
|
|
case AF_INET6: |
433 |
|
|
fec.type = FEC_TYPE_IPV6; |
434 |
|
|
fec.u.ipv6.prefix = kr.prefix.v6; |
435 |
|
|
fec.u.ipv6.prefixlen = kr.prefixlen; |
436 |
|
|
break; |
437 |
|
|
default: |
438 |
|
|
fatalx("lde_dispatch_parent: unknown af"); |
439 |
|
|
} |
440 |
|
|
|
441 |
|
|
switch (imsg.hdr.type) { |
442 |
|
|
case IMSG_NETWORK_ADD: |
443 |
|
|
lde_kernel_insert(&fec, kr.af, &kr.nexthop, |
444 |
|
|
kr.priority, kr.flags & F_CONNECTED, NULL); |
445 |
|
|
break; |
446 |
|
|
case IMSG_NETWORK_DEL: |
447 |
|
|
lde_kernel_remove(&fec, kr.af, &kr.nexthop, |
448 |
|
|
kr.priority); |
449 |
|
|
break; |
450 |
|
|
} |
451 |
|
|
break; |
452 |
|
|
case IMSG_SOCKET_IPC: |
453 |
|
|
if (iev_ldpe) { |
454 |
|
|
log_warnx("%s: received unexpected imsg fd " |
455 |
|
|
"to ldpe", __func__); |
456 |
|
|
break; |
457 |
|
|
} |
458 |
|
|
if ((fd = imsg.fd) == -1) { |
459 |
|
|
log_warnx("%s: expected to receive imsg fd to " |
460 |
|
|
"ldpe but didn't receive any", __func__); |
461 |
|
|
break; |
462 |
|
|
} |
463 |
|
|
|
464 |
|
|
if ((iev_ldpe = malloc(sizeof(struct imsgev))) == NULL) |
465 |
|
|
fatal(NULL); |
466 |
|
|
imsg_init(&iev_ldpe->ibuf, fd); |
467 |
|
|
iev_ldpe->handler = lde_dispatch_imsg; |
468 |
|
|
iev_ldpe->events = EV_READ; |
469 |
|
|
event_set(&iev_ldpe->ev, iev_ldpe->ibuf.fd, |
470 |
|
|
iev_ldpe->events, iev_ldpe->handler, iev_ldpe); |
471 |
|
|
event_add(&iev_ldpe->ev, NULL); |
472 |
|
|
break; |
473 |
|
|
case IMSG_RECONF_CONF: |
474 |
|
|
if ((nconf = malloc(sizeof(struct ldpd_conf))) == |
475 |
|
|
NULL) |
476 |
|
|
fatal(NULL); |
477 |
|
|
memcpy(nconf, imsg.data, sizeof(struct ldpd_conf)); |
478 |
|
|
|
479 |
|
|
LIST_INIT(&nconf->iface_list); |
480 |
|
|
LIST_INIT(&nconf->tnbr_list); |
481 |
|
|
LIST_INIT(&nconf->nbrp_list); |
482 |
|
|
LIST_INIT(&nconf->l2vpn_list); |
483 |
|
|
break; |
484 |
|
|
case IMSG_RECONF_IFACE: |
485 |
|
|
if ((niface = malloc(sizeof(struct iface))) == NULL) |
486 |
|
|
fatal(NULL); |
487 |
|
|
memcpy(niface, imsg.data, sizeof(struct iface)); |
488 |
|
|
|
489 |
|
|
LIST_INIT(&niface->addr_list); |
490 |
|
|
LIST_INIT(&niface->ipv4.adj_list); |
491 |
|
|
LIST_INIT(&niface->ipv6.adj_list); |
492 |
|
|
niface->ipv4.iface = niface; |
493 |
|
|
niface->ipv6.iface = niface; |
494 |
|
|
|
495 |
|
|
LIST_INSERT_HEAD(&nconf->iface_list, niface, entry); |
496 |
|
|
break; |
497 |
|
|
case IMSG_RECONF_TNBR: |
498 |
|
|
if ((ntnbr = malloc(sizeof(struct tnbr))) == NULL) |
499 |
|
|
fatal(NULL); |
500 |
|
|
memcpy(ntnbr, imsg.data, sizeof(struct tnbr)); |
501 |
|
|
|
502 |
|
|
LIST_INSERT_HEAD(&nconf->tnbr_list, ntnbr, entry); |
503 |
|
|
break; |
504 |
|
|
case IMSG_RECONF_NBRP: |
505 |
|
|
if ((nnbrp = malloc(sizeof(struct nbr_params))) == NULL) |
506 |
|
|
fatal(NULL); |
507 |
|
|
memcpy(nnbrp, imsg.data, sizeof(struct nbr_params)); |
508 |
|
|
|
509 |
|
|
LIST_INSERT_HEAD(&nconf->nbrp_list, nnbrp, entry); |
510 |
|
|
break; |
511 |
|
|
case IMSG_RECONF_L2VPN: |
512 |
|
|
if ((nl2vpn = malloc(sizeof(struct l2vpn))) == NULL) |
513 |
|
|
fatal(NULL); |
514 |
|
|
memcpy(nl2vpn, imsg.data, sizeof(struct l2vpn)); |
515 |
|
|
|
516 |
|
|
LIST_INIT(&nl2vpn->if_list); |
517 |
|
|
LIST_INIT(&nl2vpn->pw_list); |
518 |
|
|
|
519 |
|
|
LIST_INSERT_HEAD(&nconf->l2vpn_list, nl2vpn, entry); |
520 |
|
|
break; |
521 |
|
|
case IMSG_RECONF_L2VPN_IF: |
522 |
|
|
if ((nlif = malloc(sizeof(struct l2vpn_if))) == NULL) |
523 |
|
|
fatal(NULL); |
524 |
|
|
memcpy(nlif, imsg.data, sizeof(struct l2vpn_if)); |
525 |
|
|
|
526 |
|
|
nlif->l2vpn = nl2vpn; |
527 |
|
|
LIST_INSERT_HEAD(&nl2vpn->if_list, nlif, entry); |
528 |
|
|
break; |
529 |
|
|
case IMSG_RECONF_L2VPN_PW: |
530 |
|
|
if ((npw = malloc(sizeof(struct l2vpn_pw))) == NULL) |
531 |
|
|
fatal(NULL); |
532 |
|
|
memcpy(npw, imsg.data, sizeof(struct l2vpn_pw)); |
533 |
|
|
|
534 |
|
|
npw->l2vpn = nl2vpn; |
535 |
|
|
LIST_INSERT_HEAD(&nl2vpn->pw_list, npw, entry); |
536 |
|
|
break; |
537 |
|
|
case IMSG_RECONF_END: |
538 |
|
|
merge_config(ldeconf, nconf); |
539 |
|
|
nconf = NULL; |
540 |
|
|
break; |
541 |
|
|
default: |
542 |
|
|
log_debug("%s: unexpected imsg %d", __func__, |
543 |
|
|
imsg.hdr.type); |
544 |
|
|
break; |
545 |
|
|
} |
546 |
|
|
imsg_free(&imsg); |
547 |
|
|
} |
548 |
|
|
if (!shut) |
549 |
|
|
imsg_event_add(iev); |
550 |
|
|
else { |
551 |
|
|
/* this pipe is dead, so remove the event handler */ |
552 |
|
|
event_del(&iev->ev); |
553 |
|
|
event_loopexit(NULL); |
554 |
|
|
} |
555 |
|
|
} |
556 |
|
|
|
557 |
|
|
uint32_t |
558 |
|
|
lde_assign_label(void) |
559 |
|
|
{ |
560 |
|
|
static uint32_t label = MPLS_LABEL_RESERVED_MAX; |
561 |
|
|
|
562 |
|
|
/* XXX some checks needed */ |
563 |
|
|
label++; |
564 |
|
|
return (label); |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
void |
568 |
|
|
lde_send_change_klabel(struct fec_node *fn, struct fec_nh *fnh) |
569 |
|
|
{ |
570 |
|
|
struct kroute kr; |
571 |
|
|
struct kpw kpw; |
572 |
|
|
struct l2vpn_pw *pw; |
573 |
|
|
|
574 |
|
|
switch (fn->fec.type) { |
575 |
|
|
case FEC_TYPE_IPV4: |
576 |
|
|
memset(&kr, 0, sizeof(kr)); |
577 |
|
|
kr.af = AF_INET; |
578 |
|
|
kr.prefix.v4 = fn->fec.u.ipv4.prefix; |
579 |
|
|
kr.prefixlen = fn->fec.u.ipv4.prefixlen; |
580 |
|
|
kr.nexthop.v4 = fnh->nexthop.v4; |
581 |
|
|
kr.local_label = fn->local_label; |
582 |
|
|
kr.remote_label = fnh->remote_label; |
583 |
|
|
kr.priority = fnh->priority; |
584 |
|
|
|
585 |
|
|
lde_imsg_compose_parent(IMSG_KLABEL_CHANGE, 0, &kr, |
586 |
|
|
sizeof(kr)); |
587 |
|
|
|
588 |
|
|
if (fn->fec.u.ipv4.prefixlen == 32) |
589 |
|
|
l2vpn_sync_pws(AF_INET, (union ldpd_addr *) |
590 |
|
|
&fn->fec.u.ipv4.prefix); |
591 |
|
|
break; |
592 |
|
|
case FEC_TYPE_IPV6: |
593 |
|
|
memset(&kr, 0, sizeof(kr)); |
594 |
|
|
kr.af = AF_INET6; |
595 |
|
|
kr.prefix.v6 = fn->fec.u.ipv6.prefix; |
596 |
|
|
kr.prefixlen = fn->fec.u.ipv6.prefixlen; |
597 |
|
|
kr.nexthop.v6 = fnh->nexthop.v6; |
598 |
|
|
kr.local_label = fn->local_label; |
599 |
|
|
kr.remote_label = fnh->remote_label; |
600 |
|
|
kr.priority = fnh->priority; |
601 |
|
|
|
602 |
|
|
lde_imsg_compose_parent(IMSG_KLABEL_CHANGE, 0, &kr, |
603 |
|
|
sizeof(kr)); |
604 |
|
|
|
605 |
|
|
if (fn->fec.u.ipv6.prefixlen == 128) |
606 |
|
|
l2vpn_sync_pws(AF_INET6, (union ldpd_addr *) |
607 |
|
|
&fn->fec.u.ipv6.prefix); |
608 |
|
|
break; |
609 |
|
|
case FEC_TYPE_PWID: |
610 |
|
|
if (fn->local_label == NO_LABEL || |
611 |
|
|
fnh->remote_label == NO_LABEL) |
612 |
|
|
return; |
613 |
|
|
|
614 |
|
|
pw = (struct l2vpn_pw *) fn->data; |
615 |
|
|
pw->flags |= F_PW_STATUS_UP; |
616 |
|
|
|
617 |
|
|
memset(&kpw, 0, sizeof(kpw)); |
618 |
|
|
kpw.ifindex = pw->ifindex; |
619 |
|
|
kpw.pw_type = fn->fec.u.pwid.type; |
620 |
|
|
kpw.af = pw->af; |
621 |
|
|
kpw.nexthop = pw->addr; |
622 |
|
|
kpw.local_label = fn->local_label; |
623 |
|
|
kpw.remote_label = fnh->remote_label; |
624 |
|
|
kpw.flags = pw->flags; |
625 |
|
|
|
626 |
|
|
lde_imsg_compose_parent(IMSG_KPWLABEL_CHANGE, 0, &kpw, |
627 |
|
|
sizeof(kpw)); |
628 |
|
|
break; |
629 |
|
|
} |
630 |
|
|
} |
631 |
|
|
|
632 |
|
|
void |
633 |
|
|
lde_send_delete_klabel(struct fec_node *fn, struct fec_nh *fnh) |
634 |
|
|
{ |
635 |
|
|
struct kroute kr; |
636 |
|
|
struct kpw kpw; |
637 |
|
|
struct l2vpn_pw *pw; |
638 |
|
|
|
639 |
|
|
switch (fn->fec.type) { |
640 |
|
|
case FEC_TYPE_IPV4: |
641 |
|
|
memset(&kr, 0, sizeof(kr)); |
642 |
|
|
kr.af = AF_INET; |
643 |
|
|
kr.prefix.v4 = fn->fec.u.ipv4.prefix; |
644 |
|
|
kr.prefixlen = fn->fec.u.ipv4.prefixlen; |
645 |
|
|
kr.nexthop.v4 = fnh->nexthop.v4; |
646 |
|
|
kr.local_label = fn->local_label; |
647 |
|
|
kr.remote_label = fnh->remote_label; |
648 |
|
|
kr.priority = fnh->priority; |
649 |
|
|
|
650 |
|
|
lde_imsg_compose_parent(IMSG_KLABEL_DELETE, 0, &kr, |
651 |
|
|
sizeof(kr)); |
652 |
|
|
|
653 |
|
|
if (fn->fec.u.ipv4.prefixlen == 32) |
654 |
|
|
l2vpn_sync_pws(AF_INET, (union ldpd_addr *) |
655 |
|
|
&fn->fec.u.ipv4.prefix); |
656 |
|
|
break; |
657 |
|
|
case FEC_TYPE_IPV6: |
658 |
|
|
memset(&kr, 0, sizeof(kr)); |
659 |
|
|
kr.af = AF_INET6; |
660 |
|
|
kr.prefix.v6 = fn->fec.u.ipv6.prefix; |
661 |
|
|
kr.prefixlen = fn->fec.u.ipv6.prefixlen; |
662 |
|
|
kr.nexthop.v6 = fnh->nexthop.v6; |
663 |
|
|
kr.local_label = fn->local_label; |
664 |
|
|
kr.remote_label = fnh->remote_label; |
665 |
|
|
kr.priority = fnh->priority; |
666 |
|
|
|
667 |
|
|
lde_imsg_compose_parent(IMSG_KLABEL_DELETE, 0, &kr, |
668 |
|
|
sizeof(kr)); |
669 |
|
|
|
670 |
|
|
if (fn->fec.u.ipv6.prefixlen == 128) |
671 |
|
|
l2vpn_sync_pws(AF_INET6, (union ldpd_addr *) |
672 |
|
|
&fn->fec.u.ipv6.prefix); |
673 |
|
|
break; |
674 |
|
|
case FEC_TYPE_PWID: |
675 |
|
|
pw = (struct l2vpn_pw *) fn->data; |
676 |
|
|
if (!(pw->flags & F_PW_STATUS_UP)) |
677 |
|
|
return; |
678 |
|
|
pw->flags &= ~F_PW_STATUS_UP; |
679 |
|
|
|
680 |
|
|
memset(&kpw, 0, sizeof(kpw)); |
681 |
|
|
kpw.ifindex = pw->ifindex; |
682 |
|
|
kpw.pw_type = fn->fec.u.pwid.type; |
683 |
|
|
kpw.af = pw->af; |
684 |
|
|
kpw.nexthop = pw->addr; |
685 |
|
|
kpw.local_label = fn->local_label; |
686 |
|
|
kpw.remote_label = fnh->remote_label; |
687 |
|
|
kpw.flags = pw->flags; |
688 |
|
|
|
689 |
|
|
lde_imsg_compose_parent(IMSG_KPWLABEL_DELETE, 0, &kpw, |
690 |
|
|
sizeof(kpw)); |
691 |
|
|
break; |
692 |
|
|
} |
693 |
|
|
} |
694 |
|
|
|
695 |
|
|
void |
696 |
|
|
lde_fec2map(struct fec *fec, struct map *map) |
697 |
|
|
{ |
698 |
|
|
memset(map, 0, sizeof(*map)); |
699 |
|
|
|
700 |
|
|
switch (fec->type) { |
701 |
|
|
case FEC_TYPE_IPV4: |
702 |
|
|
map->type = MAP_TYPE_PREFIX; |
703 |
|
|
map->fec.prefix.af = AF_INET; |
704 |
|
|
map->fec.prefix.prefix.v4 = fec->u.ipv4.prefix; |
705 |
|
|
map->fec.prefix.prefixlen = fec->u.ipv4.prefixlen; |
706 |
|
|
break; |
707 |
|
|
case FEC_TYPE_IPV6: |
708 |
|
|
map->type = MAP_TYPE_PREFIX; |
709 |
|
|
map->fec.prefix.af = AF_INET6; |
710 |
|
|
map->fec.prefix.prefix.v6 = fec->u.ipv6.prefix; |
711 |
|
|
map->fec.prefix.prefixlen = fec->u.ipv6.prefixlen; |
712 |
|
|
break; |
713 |
|
|
case FEC_TYPE_PWID: |
714 |
|
|
map->type = MAP_TYPE_PWID; |
715 |
|
|
map->fec.pwid.type = fec->u.pwid.type; |
716 |
|
|
map->fec.pwid.group_id = 0; |
717 |
|
|
map->flags |= F_MAP_PW_ID; |
718 |
|
|
map->fec.pwid.pwid = fec->u.pwid.pwid; |
719 |
|
|
break; |
720 |
|
|
} |
721 |
|
|
} |
722 |
|
|
|
723 |
|
|
void |
724 |
|
|
lde_map2fec(struct map *map, struct in_addr lsr_id, struct fec *fec) |
725 |
|
|
{ |
726 |
|
|
memset(fec, 0, sizeof(*fec)); |
727 |
|
|
|
728 |
|
|
switch (map->type) { |
729 |
|
|
case MAP_TYPE_PREFIX: |
730 |
|
|
switch (map->fec.prefix.af) { |
731 |
|
|
case AF_INET: |
732 |
|
|
fec->type = FEC_TYPE_IPV4; |
733 |
|
|
fec->u.ipv4.prefix = map->fec.prefix.prefix.v4; |
734 |
|
|
fec->u.ipv4.prefixlen = map->fec.prefix.prefixlen; |
735 |
|
|
break; |
736 |
|
|
case AF_INET6: |
737 |
|
|
fec->type = FEC_TYPE_IPV6; |
738 |
|
|
fec->u.ipv6.prefix = map->fec.prefix.prefix.v6; |
739 |
|
|
fec->u.ipv6.prefixlen = map->fec.prefix.prefixlen; |
740 |
|
|
break; |
741 |
|
|
default: |
742 |
|
|
fatalx("lde_map2fec: unknown af"); |
743 |
|
|
break; |
744 |
|
|
} |
745 |
|
|
break; |
746 |
|
|
case MAP_TYPE_PWID: |
747 |
|
|
fec->type = FEC_TYPE_PWID; |
748 |
|
|
fec->u.pwid.type = map->fec.pwid.type; |
749 |
|
|
fec->u.pwid.pwid = map->fec.pwid.pwid; |
750 |
|
|
fec->u.pwid.lsr_id = lsr_id; |
751 |
|
|
break; |
752 |
|
|
} |
753 |
|
|
} |
754 |
|
|
|
755 |
|
|
void |
756 |
|
|
lde_send_labelmapping(struct lde_nbr *ln, struct fec_node *fn, int single) |
757 |
|
|
{ |
758 |
|
|
struct lde_req *lre; |
759 |
|
|
struct lde_map *me; |
760 |
|
|
struct map map; |
761 |
|
|
struct l2vpn_pw *pw; |
762 |
|
|
|
763 |
|
|
/* |
764 |
|
|
* This function skips SL.1 - 3 and SL.9 - 14 because the label |
765 |
|
|
* allocation is done way earlier (because of the merging nature of |
766 |
|
|
* ldpd). |
767 |
|
|
*/ |
768 |
|
|
|
769 |
|
|
lde_fec2map(&fn->fec, &map); |
770 |
|
|
switch (fn->fec.type) { |
771 |
|
|
case FEC_TYPE_IPV4: |
772 |
|
|
if (!ln->v4_enabled) |
773 |
|
|
return; |
774 |
|
|
break; |
775 |
|
|
case FEC_TYPE_IPV6: |
776 |
|
|
if (!ln->v6_enabled) |
777 |
|
|
return; |
778 |
|
|
break; |
779 |
|
|
case FEC_TYPE_PWID: |
780 |
|
|
pw = (struct l2vpn_pw *) fn->data; |
781 |
|
|
if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr) |
782 |
|
|
/* not the remote end of the pseudowire */ |
783 |
|
|
return; |
784 |
|
|
|
785 |
|
|
map.flags |= F_MAP_PW_IFMTU; |
786 |
|
|
map.fec.pwid.ifmtu = pw->l2vpn->mtu; |
787 |
|
|
if (pw->flags & F_PW_CWORD) |
788 |
|
|
map.flags |= F_MAP_PW_CWORD; |
789 |
|
|
if (pw->flags & F_PW_STATUSTLV) { |
790 |
|
|
map.flags |= F_MAP_PW_STATUS; |
791 |
|
|
/* VPLS are always up */ |
792 |
|
|
map.pw_status = PW_FORWARDING; |
793 |
|
|
} |
794 |
|
|
break; |
795 |
|
|
} |
796 |
|
|
map.label = fn->local_label; |
797 |
|
|
|
798 |
|
|
/* SL.6: is there a pending request for this mapping? */ |
799 |
|
|
lre = (struct lde_req *)fec_find(&ln->recv_req, &fn->fec); |
800 |
|
|
if (lre) { |
801 |
|
|
/* set label request msg id in the mapping response. */ |
802 |
|
|
map.requestid = lre->msg_id; |
803 |
|
|
map.flags = F_MAP_REQ_ID; |
804 |
|
|
|
805 |
|
|
/* SL.7: delete record of pending request */ |
806 |
|
|
lde_req_del(ln, lre, 0); |
807 |
|
|
} |
808 |
|
|
|
809 |
|
|
/* SL.4: send label mapping */ |
810 |
|
|
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD, ln->peerid, 0, |
811 |
|
|
&map, sizeof(map)); |
812 |
|
|
if (single) |
813 |
|
|
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, |
814 |
|
|
NULL, 0); |
815 |
|
|
|
816 |
|
|
/* SL.5: record sent label mapping */ |
817 |
|
|
me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec); |
818 |
|
|
if (me == NULL) |
819 |
|
|
me = lde_map_add(ln, fn, 1); |
820 |
|
|
me->map = map; |
821 |
|
|
} |
822 |
|
|
|
823 |
|
|
void |
824 |
|
|
lde_send_labelwithdraw(struct lde_nbr *ln, struct fec_node *fn, |
825 |
|
|
struct map *wcard, struct status_tlv *st) |
826 |
|
|
{ |
827 |
|
|
struct lde_wdraw *lw; |
828 |
|
|
struct map map; |
829 |
|
|
struct fec *f; |
830 |
|
|
struct l2vpn_pw *pw; |
831 |
|
|
|
832 |
|
|
if (fn) { |
833 |
|
|
lde_fec2map(&fn->fec, &map); |
834 |
|
|
switch (fn->fec.type) { |
835 |
|
|
case FEC_TYPE_IPV4: |
836 |
|
|
if (!ln->v4_enabled) |
837 |
|
|
return; |
838 |
|
|
break; |
839 |
|
|
case FEC_TYPE_IPV6: |
840 |
|
|
if (!ln->v6_enabled) |
841 |
|
|
return; |
842 |
|
|
break; |
843 |
|
|
case FEC_TYPE_PWID: |
844 |
|
|
pw = (struct l2vpn_pw *) fn->data; |
845 |
|
|
if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr) |
846 |
|
|
/* not the remote end of the pseudowire */ |
847 |
|
|
return; |
848 |
|
|
|
849 |
|
|
if (pw->flags & F_PW_CWORD) |
850 |
|
|
map.flags |= F_MAP_PW_CWORD; |
851 |
|
|
break; |
852 |
|
|
} |
853 |
|
|
map.label = fn->local_label; |
854 |
|
|
} else |
855 |
|
|
memcpy(&map, wcard, sizeof(map)); |
856 |
|
|
|
857 |
|
|
if (st) { |
858 |
|
|
map.st.status_code = st->status_code; |
859 |
|
|
map.st.msg_id = st->msg_id; |
860 |
|
|
map.st.msg_type = st->msg_type; |
861 |
|
|
map.flags |= F_MAP_STATUS; |
862 |
|
|
} |
863 |
|
|
|
864 |
|
|
/* SWd.1: send label withdraw. */ |
865 |
|
|
lde_imsg_compose_ldpe(IMSG_WITHDRAW_ADD, ln->peerid, 0, |
866 |
|
|
&map, sizeof(map)); |
867 |
|
|
lde_imsg_compose_ldpe(IMSG_WITHDRAW_ADD_END, ln->peerid, 0, NULL, 0); |
868 |
|
|
|
869 |
|
|
/* SWd.2: record label withdraw. */ |
870 |
|
|
if (fn) { |
871 |
|
|
lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec); |
872 |
|
|
if (lw == NULL) |
873 |
|
|
lw = lde_wdraw_add(ln, fn); |
874 |
|
|
lw->label = map.label; |
875 |
|
|
} else { |
876 |
|
|
struct lde_map *me; |
877 |
|
|
|
878 |
|
|
RB_FOREACH(f, fec_tree, &ft) { |
879 |
|
|
fn = (struct fec_node *)f; |
880 |
|
|
me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec); |
881 |
|
|
if (lde_wildcard_apply(wcard, &fn->fec, me) == 0) |
882 |
|
|
continue; |
883 |
|
|
|
884 |
|
|
lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, |
885 |
|
|
&fn->fec); |
886 |
|
|
if (lw == NULL) |
887 |
|
|
lw = lde_wdraw_add(ln, fn); |
888 |
|
|
lw->label = map.label; |
889 |
|
|
} |
890 |
|
|
} |
891 |
|
|
} |
892 |
|
|
|
893 |
|
|
void |
894 |
|
|
lde_send_labelwithdraw_wcard(struct lde_nbr *ln, uint32_t label) |
895 |
|
|
{ |
896 |
|
|
struct map wcard; |
897 |
|
|
|
898 |
|
|
memset(&wcard, 0, sizeof(wcard)); |
899 |
|
|
wcard.type = MAP_TYPE_WILDCARD; |
900 |
|
|
wcard.label = label; |
901 |
|
|
lde_send_labelwithdraw(ln, NULL, &wcard, NULL); |
902 |
|
|
} |
903 |
|
|
|
904 |
|
|
void |
905 |
|
|
lde_send_labelwithdraw_twcard_prefix(struct lde_nbr *ln, uint16_t af, |
906 |
|
|
uint32_t label) |
907 |
|
|
{ |
908 |
|
|
struct map wcard; |
909 |
|
|
|
910 |
|
|
memset(&wcard, 0, sizeof(wcard)); |
911 |
|
|
wcard.type = MAP_TYPE_TYPED_WCARD; |
912 |
|
|
wcard.fec.twcard.type = MAP_TYPE_PREFIX; |
913 |
|
|
wcard.fec.twcard.u.prefix_af = af; |
914 |
|
|
wcard.label = label; |
915 |
|
|
lde_send_labelwithdraw(ln, NULL, &wcard, NULL); |
916 |
|
|
} |
917 |
|
|
|
918 |
|
|
void |
919 |
|
|
lde_send_labelwithdraw_twcard_pwid(struct lde_nbr *ln, uint16_t pw_type, |
920 |
|
|
uint32_t label) |
921 |
|
|
{ |
922 |
|
|
struct map wcard; |
923 |
|
|
|
924 |
|
|
memset(&wcard, 0, sizeof(wcard)); |
925 |
|
|
wcard.type = MAP_TYPE_TYPED_WCARD; |
926 |
|
|
wcard.fec.twcard.type = MAP_TYPE_PWID; |
927 |
|
|
wcard.fec.twcard.u.pw_type = pw_type; |
928 |
|
|
wcard.label = label; |
929 |
|
|
lde_send_labelwithdraw(ln, NULL, &wcard, NULL); |
930 |
|
|
} |
931 |
|
|
|
932 |
|
|
void |
933 |
|
|
lde_send_labelwithdraw_pwid_wcard(struct lde_nbr *ln, uint16_t pw_type, |
934 |
|
|
uint32_t group_id) |
935 |
|
|
{ |
936 |
|
|
struct map wcard; |
937 |
|
|
|
938 |
|
|
memset(&wcard, 0, sizeof(wcard)); |
939 |
|
|
wcard.type = MAP_TYPE_PWID; |
940 |
|
|
wcard.fec.pwid.type = pw_type; |
941 |
|
|
wcard.fec.pwid.group_id = group_id; |
942 |
|
|
/* we can not append a Label TLV when using PWid group wildcards. */ |
943 |
|
|
wcard.label = NO_LABEL; |
944 |
|
|
lde_send_labelwithdraw(ln, NULL, &wcard, NULL); |
945 |
|
|
} |
946 |
|
|
|
947 |
|
|
void |
948 |
|
|
lde_send_labelrelease(struct lde_nbr *ln, struct fec_node *fn, |
949 |
|
|
struct map *wcard, uint32_t label) |
950 |
|
|
{ |
951 |
|
|
struct map map; |
952 |
|
|
struct l2vpn_pw *pw; |
953 |
|
|
|
954 |
|
|
if (fn) { |
955 |
|
|
lde_fec2map(&fn->fec, &map); |
956 |
|
|
switch (fn->fec.type) { |
957 |
|
|
case FEC_TYPE_IPV4: |
958 |
|
|
if (!ln->v4_enabled) |
959 |
|
|
return; |
960 |
|
|
break; |
961 |
|
|
case FEC_TYPE_IPV6: |
962 |
|
|
if (!ln->v6_enabled) |
963 |
|
|
return; |
964 |
|
|
break; |
965 |
|
|
case FEC_TYPE_PWID: |
966 |
|
|
pw = (struct l2vpn_pw *) fn->data; |
967 |
|
|
if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr) |
968 |
|
|
/* not the remote end of the pseudowire */ |
969 |
|
|
return; |
970 |
|
|
|
971 |
|
|
if (pw->flags & F_PW_CWORD) |
972 |
|
|
map.flags |= F_MAP_PW_CWORD; |
973 |
|
|
break; |
974 |
|
|
} |
975 |
|
|
} else |
976 |
|
|
memcpy(&map, wcard, sizeof(map)); |
977 |
|
|
map.label = label; |
978 |
|
|
|
979 |
|
|
lde_imsg_compose_ldpe(IMSG_RELEASE_ADD, ln->peerid, 0, |
980 |
|
|
&map, sizeof(map)); |
981 |
|
|
lde_imsg_compose_ldpe(IMSG_RELEASE_ADD_END, ln->peerid, 0, NULL, 0); |
982 |
|
|
} |
983 |
|
|
|
984 |
|
|
void |
985 |
|
|
lde_send_notification(struct lde_nbr *ln, uint32_t status_code, uint32_t msg_id, |
986 |
|
|
uint16_t msg_type) |
987 |
|
|
{ |
988 |
|
|
struct notify_msg nm; |
989 |
|
|
|
990 |
|
|
memset(&nm, 0, sizeof(nm)); |
991 |
|
|
nm.status_code = status_code; |
992 |
|
|
/* 'msg_id' and 'msg_type' should be in network byte order */ |
993 |
|
|
nm.msg_id = msg_id; |
994 |
|
|
nm.msg_type = msg_type; |
995 |
|
|
|
996 |
|
|
lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, |
997 |
|
|
&nm, sizeof(nm)); |
998 |
|
|
} |
999 |
|
|
|
1000 |
|
|
void |
1001 |
|
|
lde_send_notification_eol_prefix(struct lde_nbr *ln, int af) |
1002 |
|
|
{ |
1003 |
|
|
struct notify_msg nm; |
1004 |
|
|
|
1005 |
|
|
memset(&nm, 0, sizeof(nm)); |
1006 |
|
|
nm.status_code = S_ENDOFLIB; |
1007 |
|
|
nm.fec.type = MAP_TYPE_TYPED_WCARD; |
1008 |
|
|
nm.fec.fec.twcard.type = MAP_TYPE_PREFIX; |
1009 |
|
|
nm.fec.fec.twcard.u.prefix_af = af; |
1010 |
|
|
nm.flags |= F_NOTIF_FEC; |
1011 |
|
|
|
1012 |
|
|
lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, |
1013 |
|
|
&nm, sizeof(nm)); |
1014 |
|
|
} |
1015 |
|
|
|
1016 |
|
|
void |
1017 |
|
|
lde_send_notification_eol_pwid(struct lde_nbr *ln, uint16_t pw_type) |
1018 |
|
|
{ |
1019 |
|
|
struct notify_msg nm; |
1020 |
|
|
|
1021 |
|
|
memset(&nm, 0, sizeof(nm)); |
1022 |
|
|
nm.status_code = S_ENDOFLIB; |
1023 |
|
|
nm.fec.type = MAP_TYPE_TYPED_WCARD; |
1024 |
|
|
nm.fec.fec.twcard.type = MAP_TYPE_PWID; |
1025 |
|
|
nm.fec.fec.twcard.u.pw_type = pw_type; |
1026 |
|
|
nm.flags |= F_NOTIF_FEC; |
1027 |
|
|
|
1028 |
|
|
lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, |
1029 |
|
|
&nm, sizeof(nm)); |
1030 |
|
|
} |
1031 |
|
|
|
1032 |
|
|
static __inline int |
1033 |
|
|
lde_nbr_compare(struct lde_nbr *a, struct lde_nbr *b) |
1034 |
|
|
{ |
1035 |
|
|
return (a->peerid - b->peerid); |
1036 |
|
|
} |
1037 |
|
|
|
1038 |
|
|
static struct lde_nbr * |
1039 |
|
|
lde_nbr_new(uint32_t peerid, struct lde_nbr *new) |
1040 |
|
|
{ |
1041 |
|
|
struct lde_nbr *ln; |
1042 |
|
|
|
1043 |
|
|
if ((ln = calloc(1, sizeof(*ln))) == NULL) |
1044 |
|
|
fatal(__func__); |
1045 |
|
|
|
1046 |
|
|
ln->id = new->id; |
1047 |
|
|
ln->v4_enabled = new->v4_enabled; |
1048 |
|
|
ln->v6_enabled = new->v6_enabled; |
1049 |
|
|
ln->flags = new->flags; |
1050 |
|
|
ln->peerid = peerid; |
1051 |
|
|
fec_init(&ln->recv_map); |
1052 |
|
|
fec_init(&ln->sent_map); |
1053 |
|
|
fec_init(&ln->recv_req); |
1054 |
|
|
fec_init(&ln->sent_req); |
1055 |
|
|
fec_init(&ln->sent_wdraw); |
1056 |
|
|
|
1057 |
|
|
TAILQ_INIT(&ln->addr_list); |
1058 |
|
|
|
1059 |
|
|
if (RB_INSERT(nbr_tree, &lde_nbrs, ln) != NULL) |
1060 |
|
|
fatalx("lde_nbr_new: RB_INSERT failed"); |
1061 |
|
|
|
1062 |
|
|
return (ln); |
1063 |
|
|
} |
1064 |
|
|
|
1065 |
|
|
static void |
1066 |
|
|
lde_nbr_del(struct lde_nbr *ln) |
1067 |
|
|
{ |
1068 |
|
|
struct fec *f; |
1069 |
|
|
struct fec_node *fn; |
1070 |
|
|
struct fec_nh *fnh; |
1071 |
|
|
struct l2vpn_pw *pw; |
1072 |
|
|
|
1073 |
|
|
if (ln == NULL) |
1074 |
|
|
return; |
1075 |
|
|
|
1076 |
|
|
/* uninstall received mappings */ |
1077 |
|
|
RB_FOREACH(f, fec_tree, &ft) { |
1078 |
|
|
fn = (struct fec_node *)f; |
1079 |
|
|
|
1080 |
|
|
LIST_FOREACH(fnh, &fn->nexthops, entry) { |
1081 |
|
|
switch (f->type) { |
1082 |
|
|
case FEC_TYPE_IPV4: |
1083 |
|
|
case FEC_TYPE_IPV6: |
1084 |
|
|
if (!lde_address_find(ln, fnh->af, |
1085 |
|
|
&fnh->nexthop)) |
1086 |
|
|
continue; |
1087 |
|
|
break; |
1088 |
|
|
case FEC_TYPE_PWID: |
1089 |
|
|
if (f->u.pwid.lsr_id.s_addr != ln->id.s_addr) |
1090 |
|
|
continue; |
1091 |
|
|
pw = (struct l2vpn_pw *) fn->data; |
1092 |
|
|
if (pw) |
1093 |
|
|
l2vpn_pw_reset(pw); |
1094 |
|
|
break; |
1095 |
|
|
default: |
1096 |
|
|
break; |
1097 |
|
|
} |
1098 |
|
|
|
1099 |
|
|
lde_send_delete_klabel(fn, fnh); |
1100 |
|
|
fnh->remote_label = NO_LABEL; |
1101 |
|
|
} |
1102 |
|
|
} |
1103 |
|
|
|
1104 |
|
|
lde_address_list_free(ln); |
1105 |
|
|
|
1106 |
|
|
fec_clear(&ln->recv_map, lde_map_free); |
1107 |
|
|
fec_clear(&ln->sent_map, lde_map_free); |
1108 |
|
|
fec_clear(&ln->recv_req, free); |
1109 |
|
|
fec_clear(&ln->sent_req, free); |
1110 |
|
|
fec_clear(&ln->sent_wdraw, free); |
1111 |
|
|
|
1112 |
|
|
RB_REMOVE(nbr_tree, &lde_nbrs, ln); |
1113 |
|
|
|
1114 |
|
|
free(ln); |
1115 |
|
|
} |
1116 |
|
|
|
1117 |
|
|
static struct lde_nbr * |
1118 |
|
|
lde_nbr_find(uint32_t peerid) |
1119 |
|
|
{ |
1120 |
|
|
struct lde_nbr ln; |
1121 |
|
|
|
1122 |
|
|
ln.peerid = peerid; |
1123 |
|
|
|
1124 |
|
|
return (RB_FIND(nbr_tree, &lde_nbrs, &ln)); |
1125 |
|
|
} |
1126 |
|
|
|
1127 |
|
|
struct lde_nbr * |
1128 |
|
|
lde_nbr_find_by_lsrid(struct in_addr addr) |
1129 |
|
|
{ |
1130 |
|
|
struct lde_nbr *ln; |
1131 |
|
|
|
1132 |
|
|
RB_FOREACH(ln, nbr_tree, &lde_nbrs) |
1133 |
|
|
if (ln->id.s_addr == addr.s_addr) |
1134 |
|
|
return (ln); |
1135 |
|
|
|
1136 |
|
|
return (NULL); |
1137 |
|
|
} |
1138 |
|
|
|
1139 |
|
|
struct lde_nbr * |
1140 |
|
|
lde_nbr_find_by_addr(int af, union ldpd_addr *addr) |
1141 |
|
|
{ |
1142 |
|
|
struct lde_nbr *ln; |
1143 |
|
|
|
1144 |
|
|
RB_FOREACH(ln, nbr_tree, &lde_nbrs) |
1145 |
|
|
if (lde_address_find(ln, af, addr) != NULL) |
1146 |
|
|
return (ln); |
1147 |
|
|
|
1148 |
|
|
return (NULL); |
1149 |
|
|
} |
1150 |
|
|
|
1151 |
|
|
static void |
1152 |
|
|
lde_nbr_clear(void) |
1153 |
|
|
{ |
1154 |
|
|
struct lde_nbr *ln; |
1155 |
|
|
|
1156 |
|
|
while ((ln = RB_ROOT(&lde_nbrs)) != NULL) |
1157 |
|
|
lde_nbr_del(ln); |
1158 |
|
|
} |
1159 |
|
|
|
1160 |
|
|
static void |
1161 |
|
|
lde_nbr_addr_update(struct lde_nbr *ln, struct lde_addr *lde_addr, int removed) |
1162 |
|
|
{ |
1163 |
|
|
struct fec *fec; |
1164 |
|
|
struct fec_node *fn; |
1165 |
|
|
struct fec_nh *fnh; |
1166 |
|
|
struct lde_map *me; |
1167 |
|
|
|
1168 |
|
|
RB_FOREACH(fec, fec_tree, &ln->recv_map) { |
1169 |
|
|
fn = (struct fec_node *)fec_find(&ft, fec); |
1170 |
|
|
switch (fec->type) { |
1171 |
|
|
case FEC_TYPE_IPV4: |
1172 |
|
|
if (lde_addr->af != AF_INET) |
1173 |
|
|
continue; |
1174 |
|
|
break; |
1175 |
|
|
case FEC_TYPE_IPV6: |
1176 |
|
|
if (lde_addr->af != AF_INET6) |
1177 |
|
|
continue; |
1178 |
|
|
break; |
1179 |
|
|
default: |
1180 |
|
|
continue; |
1181 |
|
|
} |
1182 |
|
|
|
1183 |
|
|
LIST_FOREACH(fnh, &fn->nexthops, entry) { |
1184 |
|
|
if (ldp_addrcmp(fnh->af, &fnh->nexthop, |
1185 |
|
|
&lde_addr->addr)) |
1186 |
|
|
continue; |
1187 |
|
|
|
1188 |
|
|
if (removed) { |
1189 |
|
|
lde_send_delete_klabel(fn, fnh); |
1190 |
|
|
fnh->remote_label = NO_LABEL; |
1191 |
|
|
} else { |
1192 |
|
|
me = (struct lde_map *)fec; |
1193 |
|
|
fnh->remote_label = me->map.label; |
1194 |
|
|
lde_send_change_klabel(fn, fnh); |
1195 |
|
|
} |
1196 |
|
|
break; |
1197 |
|
|
} |
1198 |
|
|
} |
1199 |
|
|
} |
1200 |
|
|
|
1201 |
|
|
struct lde_map * |
1202 |
|
|
lde_map_add(struct lde_nbr *ln, struct fec_node *fn, int sent) |
1203 |
|
|
{ |
1204 |
|
|
struct lde_map *me; |
1205 |
|
|
|
1206 |
|
|
me = calloc(1, sizeof(*me)); |
1207 |
|
|
if (me == NULL) |
1208 |
|
|
fatal(__func__); |
1209 |
|
|
|
1210 |
|
|
me->fec = fn->fec; |
1211 |
|
|
me->nexthop = ln; |
1212 |
|
|
|
1213 |
|
|
if (sent) { |
1214 |
|
|
LIST_INSERT_HEAD(&fn->upstream, me, entry); |
1215 |
|
|
if (fec_insert(&ln->sent_map, &me->fec)) |
1216 |
|
|
log_warnx("failed to add %s to sent map", |
1217 |
|
|
log_fec(&me->fec)); |
1218 |
|
|
/* XXX on failure more cleanup is needed */ |
1219 |
|
|
} else { |
1220 |
|
|
LIST_INSERT_HEAD(&fn->downstream, me, entry); |
1221 |
|
|
if (fec_insert(&ln->recv_map, &me->fec)) |
1222 |
|
|
log_warnx("failed to add %s to recv map", |
1223 |
|
|
log_fec(&me->fec)); |
1224 |
|
|
} |
1225 |
|
|
|
1226 |
|
|
return (me); |
1227 |
|
|
} |
1228 |
|
|
|
1229 |
|
|
void |
1230 |
|
|
lde_map_del(struct lde_nbr *ln, struct lde_map *me, int sent) |
1231 |
|
|
{ |
1232 |
|
|
if (sent) |
1233 |
|
|
fec_remove(&ln->sent_map, &me->fec); |
1234 |
|
|
else |
1235 |
|
|
fec_remove(&ln->recv_map, &me->fec); |
1236 |
|
|
|
1237 |
|
|
lde_map_free(me); |
1238 |
|
|
} |
1239 |
|
|
|
1240 |
|
|
static void |
1241 |
|
|
lde_map_free(void *ptr) |
1242 |
|
|
{ |
1243 |
|
|
struct lde_map *map = ptr; |
1244 |
|
|
|
1245 |
|
|
LIST_REMOVE(map, entry); |
1246 |
|
|
free(map); |
1247 |
|
|
} |
1248 |
|
|
|
1249 |
|
|
struct lde_req * |
1250 |
|
|
lde_req_add(struct lde_nbr *ln, struct fec *fec, int sent) |
1251 |
|
|
{ |
1252 |
|
|
struct fec_tree *t; |
1253 |
|
|
struct lde_req *lre; |
1254 |
|
|
|
1255 |
|
|
t = sent ? &ln->sent_req : &ln->recv_req; |
1256 |
|
|
|
1257 |
|
|
lre = calloc(1, sizeof(*lre)); |
1258 |
|
|
if (lre != NULL) { |
1259 |
|
|
lre->fec = *fec; |
1260 |
|
|
|
1261 |
|
|
if (fec_insert(t, &lre->fec)) { |
1262 |
|
|
log_warnx("failed to add %s to %s req", |
1263 |
|
|
log_fec(&lre->fec), sent ? "sent" : "recv"); |
1264 |
|
|
free(lre); |
1265 |
|
|
return (NULL); |
1266 |
|
|
} |
1267 |
|
|
} |
1268 |
|
|
|
1269 |
|
|
return (lre); |
1270 |
|
|
} |
1271 |
|
|
|
1272 |
|
|
void |
1273 |
|
|
lde_req_del(struct lde_nbr *ln, struct lde_req *lre, int sent) |
1274 |
|
|
{ |
1275 |
|
|
if (sent) |
1276 |
|
|
fec_remove(&ln->sent_req, &lre->fec); |
1277 |
|
|
else |
1278 |
|
|
fec_remove(&ln->recv_req, &lre->fec); |
1279 |
|
|
|
1280 |
|
|
free(lre); |
1281 |
|
|
} |
1282 |
|
|
|
1283 |
|
|
struct lde_wdraw * |
1284 |
|
|
lde_wdraw_add(struct lde_nbr *ln, struct fec_node *fn) |
1285 |
|
|
{ |
1286 |
|
|
struct lde_wdraw *lw; |
1287 |
|
|
|
1288 |
|
|
lw = calloc(1, sizeof(*lw)); |
1289 |
|
|
if (lw == NULL) |
1290 |
|
|
fatal(__func__); |
1291 |
|
|
|
1292 |
|
|
lw->fec = fn->fec; |
1293 |
|
|
|
1294 |
|
|
if (fec_insert(&ln->sent_wdraw, &lw->fec)) |
1295 |
|
|
log_warnx("failed to add %s to sent wdraw", |
1296 |
|
|
log_fec(&lw->fec)); |
1297 |
|
|
|
1298 |
|
|
return (lw); |
1299 |
|
|
} |
1300 |
|
|
|
1301 |
|
|
void |
1302 |
|
|
lde_wdraw_del(struct lde_nbr *ln, struct lde_wdraw *lw) |
1303 |
|
|
{ |
1304 |
|
|
fec_remove(&ln->sent_wdraw, &lw->fec); |
1305 |
|
|
free(lw); |
1306 |
|
|
} |
1307 |
|
|
|
1308 |
|
|
void |
1309 |
|
|
lde_change_egress_label(int af, int was_implicit) |
1310 |
|
|
{ |
1311 |
|
|
struct lde_nbr *ln; |
1312 |
|
|
struct fec *f; |
1313 |
|
|
struct fec_node *fn; |
1314 |
|
|
|
1315 |
|
|
RB_FOREACH(ln, nbr_tree, &lde_nbrs) { |
1316 |
|
|
/* explicit withdraw */ |
1317 |
|
|
if (was_implicit) |
1318 |
|
|
lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IMPLNULL); |
1319 |
|
|
else { |
1320 |
|
|
if (ln->v4_enabled) |
1321 |
|
|
lde_send_labelwithdraw_wcard(ln, |
1322 |
|
|
MPLS_LABEL_IPV4NULL); |
1323 |
|
|
if (ln->v6_enabled) |
1324 |
|
|
lde_send_labelwithdraw_wcard(ln, |
1325 |
|
|
MPLS_LABEL_IPV6NULL); |
1326 |
|
|
} |
1327 |
|
|
|
1328 |
|
|
/* advertise new label of connected prefixes */ |
1329 |
|
|
RB_FOREACH(f, fec_tree, &ft) { |
1330 |
|
|
fn = (struct fec_node *)f; |
1331 |
|
|
if (fn->local_label > MPLS_LABEL_RESERVED_MAX) |
1332 |
|
|
continue; |
1333 |
|
|
|
1334 |
|
|
switch (af) { |
1335 |
|
|
case AF_INET: |
1336 |
|
|
if (fn->fec.type != FEC_TYPE_IPV4) |
1337 |
|
|
continue; |
1338 |
|
|
break; |
1339 |
|
|
case AF_INET6: |
1340 |
|
|
if (fn->fec.type != FEC_TYPE_IPV6) |
1341 |
|
|
continue; |
1342 |
|
|
break; |
1343 |
|
|
default: |
1344 |
|
|
fatalx("lde_change_egress_label: unknown af"); |
1345 |
|
|
} |
1346 |
|
|
|
1347 |
|
|
fn->local_label = egress_label(fn->fec.type); |
1348 |
|
|
lde_send_labelmapping(ln, fn, 0); |
1349 |
|
|
} |
1350 |
|
|
|
1351 |
|
|
lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, |
1352 |
|
|
NULL, 0); |
1353 |
|
|
} |
1354 |
|
|
} |
1355 |
|
|
|
1356 |
|
|
static int |
1357 |
|
|
lde_address_add(struct lde_nbr *ln, struct lde_addr *lde_addr) |
1358 |
|
|
{ |
1359 |
|
|
struct lde_addr *new; |
1360 |
|
|
|
1361 |
|
|
if (lde_address_find(ln, lde_addr->af, &lde_addr->addr) != NULL) |
1362 |
|
|
return (-1); |
1363 |
|
|
|
1364 |
|
|
if ((new = calloc(1, sizeof(*new))) == NULL) |
1365 |
|
|
fatal(__func__); |
1366 |
|
|
|
1367 |
|
|
new->af = lde_addr->af; |
1368 |
|
|
new->addr = lde_addr->addr; |
1369 |
|
|
TAILQ_INSERT_TAIL(&ln->addr_list, new, entry); |
1370 |
|
|
|
1371 |
|
|
/* reevaluate the previously received mappings from this neighbor */ |
1372 |
|
|
lde_nbr_addr_update(ln, lde_addr, 0); |
1373 |
|
|
|
1374 |
|
|
return (0); |
1375 |
|
|
} |
1376 |
|
|
|
1377 |
|
|
static int |
1378 |
|
|
lde_address_del(struct lde_nbr *ln, struct lde_addr *lde_addr) |
1379 |
|
|
{ |
1380 |
|
|
lde_addr = lde_address_find(ln, lde_addr->af, &lde_addr->addr); |
1381 |
|
|
if (lde_addr == NULL) |
1382 |
|
|
return (-1); |
1383 |
|
|
|
1384 |
|
|
/* reevaluate the previously received mappings from this neighbor */ |
1385 |
|
|
lde_nbr_addr_update(ln, lde_addr, 1); |
1386 |
|
|
|
1387 |
|
|
TAILQ_REMOVE(&ln->addr_list, lde_addr, entry); |
1388 |
|
|
free(lde_addr); |
1389 |
|
|
|
1390 |
|
|
return (0); |
1391 |
|
|
} |
1392 |
|
|
|
1393 |
|
|
struct lde_addr * |
1394 |
|
|
lde_address_find(struct lde_nbr *ln, int af, union ldpd_addr *addr) |
1395 |
|
|
{ |
1396 |
|
|
struct lde_addr *lde_addr; |
1397 |
|
|
|
1398 |
|
|
TAILQ_FOREACH(lde_addr, &ln->addr_list, entry) |
1399 |
|
|
if (lde_addr->af == af && |
1400 |
|
|
ldp_addrcmp(af, &lde_addr->addr, addr) == 0) |
1401 |
|
|
return (lde_addr); |
1402 |
|
|
|
1403 |
|
|
return (NULL); |
1404 |
|
|
} |
1405 |
|
|
|
1406 |
|
|
static void |
1407 |
|
|
lde_address_list_free(struct lde_nbr *ln) |
1408 |
|
|
{ |
1409 |
|
|
struct lde_addr *lde_addr; |
1410 |
|
|
|
1411 |
|
|
while ((lde_addr = TAILQ_FIRST(&ln->addr_list)) != NULL) { |
1412 |
|
|
TAILQ_REMOVE(&ln->addr_list, lde_addr, entry); |
1413 |
|
|
free(lde_addr); |
1414 |
|
|
} |
1415 |
|
|
} |