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src/usr.sbin/ospf6d/ospfe.c

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/* $OpenBSD: ospfe.c,v 1.71 2023/12/13 15:34:43 claudio Exp $ */
/*
* Copyright (c) 2005 Claudio Jeker <claudio@openbsd.org>
* Copyright (c) 2004 Esben Norby <norby@openbsd.org>
* Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/queue.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if_types.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <fcntl.h>
#include <pwd.h>
#include <unistd.h>
#include <event.h>
#include <err.h>
#include <errno.h>
#include <stdio.h>
#include "ospf6.h"
#include "ospf6d.h"
#include "ospfe.h"
#include "rde.h"
#include "control.h"
#include "log.h"
void ospfe_sig_handler(int, short, void *);
__dead void ospfe_shutdown(void);
void orig_rtr_lsa_all(struct area *);
struct iface *find_vlink(struct abr_rtr *);
struct ospfd_conf *oeconf = NULL, *noeconf;
static struct imsgev *iev_main;
static struct imsgev *iev_rde;
int oe_nofib;
void
ospfe_sig_handler(int sig, short event, void *bula)
{
switch (sig) {
case SIGINT:
case SIGTERM:
ospfe_shutdown();
/* NOTREACHED */
default:
fatalx("unexpected signal");
}
}
/* ospf engine */
pid_t
ospfe(struct ospfd_conf *xconf, int pipe_parent2ospfe[2], int pipe_ospfe2rde[2],
int pipe_parent2rde[2])
{
struct area *area;
struct iface *iface;
struct passwd *pw;
struct event ev_sigint, ev_sigterm;
pid_t pid;
switch (pid = fork()) {
case -1:
fatal("cannot fork");
case 0:
break;
default:
return (pid);
}
/* create the raw ip socket */
if ((xconf->ospf_socket = socket(AF_INET6,
SOCK_RAW | SOCK_CLOEXEC | SOCK_NONBLOCK, IPPROTO_OSPF)) == -1)
fatal("error creating raw socket");
/* set some defaults */
if (if_set_mcast_loop(xconf->ospf_socket) == -1)
fatal("if_set_mcast_loop");
if (if_set_ipv6_checksum(xconf->ospf_socket) == -1)
fatal("if_set_ipv6_checksum");
if (if_set_ipv6_pktinfo(xconf->ospf_socket, 1) == -1)
fatal("if_set_ipv6_pktinfo");
if_set_sockbuf(xconf->ospf_socket);
oeconf = xconf;
if (oeconf->flags & OSPFD_FLAG_NO_FIB_UPDATE)
oe_nofib = 1;
if ((pw = getpwnam(OSPF6D_USER)) == NULL)
fatal("getpwnam");
if (chroot(pw->pw_dir) == -1)
fatal("chroot");
if (chdir("/") == -1)
fatal("chdir(\"/\")");
setproctitle("ospf engine");
/*
* XXX needed with fork+exec
* log_init(debug, LOG_DAEMON);
* log_setverbose(verbose);
*/
ospfd_process = PROC_OSPF_ENGINE;
log_procinit(log_procnames[ospfd_process]);
if (setgroups(1, &pw->pw_gid) ||
setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) ||
setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid))
fatal("can't drop privileges");
if (pledge("stdio inet mcast recvfd", NULL) == -1)
fatal("pledge");
event_init();
nbr_init(NBR_HASHSIZE);
lsa_cache_init(LSA_HASHSIZE);
/* setup signal handler */
signal_set(&ev_sigint, SIGINT, ospfe_sig_handler, NULL);
signal_set(&ev_sigterm, SIGTERM, ospfe_sig_handler, NULL);
signal_add(&ev_sigint, NULL);
signal_add(&ev_sigterm, NULL);
signal(SIGPIPE, SIG_IGN);
signal(SIGHUP, SIG_IGN);
/* setup pipes */
close(pipe_parent2ospfe[0]);
close(pipe_ospfe2rde[1]);
close(pipe_parent2rde[0]);
close(pipe_parent2rde[1]);
if ((iev_rde = malloc(sizeof(struct imsgev))) == NULL ||
(iev_main = malloc(sizeof(struct imsgev))) == NULL)
fatal(NULL);
imsg_init(&iev_rde->ibuf, pipe_ospfe2rde[0]);
iev_rde->handler = ospfe_dispatch_rde;
imsg_init(&iev_main->ibuf, pipe_parent2ospfe[1]);
iev_main->handler = ospfe_dispatch_main;
/* setup event handler */
iev_rde->events = EV_READ;
event_set(&iev_rde->ev, iev_rde->ibuf.fd, iev_rde->events,
iev_rde->handler, iev_rde);
event_add(&iev_rde->ev, NULL);
iev_main->events = EV_READ;
event_set(&iev_main->ev, iev_main->ibuf.fd, iev_main->events,
iev_main->handler, iev_main);
event_add(&iev_main->ev, NULL);
event_set(&oeconf->ev, oeconf->ospf_socket, EV_READ|EV_PERSIST,
recv_packet, oeconf);
event_add(&oeconf->ev, NULL);
/* remove unneeded config stuff */
conf_clear_redist_list(&oeconf->redist_list);
/* start interfaces */
LIST_FOREACH(area, &oeconf->area_list, entry) {
ospfe_demote_area(area, 0);
LIST_FOREACH(iface, &area->iface_list, entry)
if_start(xconf, iface);
}
event_dispatch();
ospfe_shutdown();
/* NOTREACHED */
return (0);
}
__dead void
ospfe_shutdown(void)
{
struct area *area;
struct iface *iface;
/* close pipes */
msgbuf_write(&iev_rde->ibuf.w);
msgbuf_clear(&iev_rde->ibuf.w);
close(iev_rde->ibuf.fd);
msgbuf_write(&iev_main->ibuf.w);
msgbuf_clear(&iev_main->ibuf.w);
close(iev_main->ibuf.fd);
/* stop all interfaces and remove all areas */
while ((area = LIST_FIRST(&oeconf->area_list)) != NULL) {
LIST_FOREACH(iface, &area->iface_list, entry) {
if (if_fsm(iface, IF_EVT_DOWN)) {
log_debug("error stopping interface %s",
iface->name);
}
}
LIST_REMOVE(area, entry);
area_del(area);
}
close(oeconf->ospf_socket);
/* clean up */
free(iev_rde);
free(iev_main);
free(oeconf);
log_info("ospf engine exiting");
_exit(0);
}
/* imesg */
int
ospfe_imsg_compose_parent(int type, pid_t pid, void *data, u_int16_t datalen)
{
return (imsg_compose_event(iev_main, type, 0, pid, -1, data, datalen));
}
int
ospfe_imsg_compose_rde(int type, u_int32_t peerid, pid_t pid,
void *data, u_int16_t datalen)
{
return (imsg_compose_event(iev_rde, type, peerid, pid, -1,
data, datalen));
}
void
ospfe_dispatch_main(int fd, short event, void *bula)
{
static struct area *narea;
struct area *area;
struct iface *iface, *ifp, *i;
struct ifaddrchange *ifc;
struct iface_addr *ia, *nia;
struct imsg imsg;
struct imsgev *iev = bula;
struct imsgbuf *ibuf = &iev->ibuf;
int n, stub_changed, shut = 0, isvalid, wasvalid;
if (event & EV_READ) {
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
fatal("imsg_read error");
if (n == 0) /* connection closed */
shut = 1;
}
if (event & EV_WRITE) {
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
fatal("msgbuf_write");
if (n == 0) /* connection closed */
shut = 1;
}
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("ospfe_dispatch_main: imsg_get error");
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_IFINFO:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct iface))
fatalx("IFINFO imsg with wrong len");
ifp = imsg.data;
LIST_FOREACH(area, &oeconf->area_list, entry) {
LIST_FOREACH(i, &area->iface_list, entry) {
if (strcmp(i->dependon,
ifp->name) == 0) {
log_warnx("interface %s"
" changed state, %s"
" depends on it",
ifp->name, i->name);
i->depend_ok =
ifstate_is_up(ifp);
if (ifstate_is_up(i))
orig_rtr_lsa(i->area);
}
}
}
if (!(ifp->cflags & F_IFACE_CONFIGURED))
break;
iface = if_find(ifp->ifindex);
if (iface == NULL)
fatalx("interface lost in ospfe");
wasvalid = (iface->flags & IFF_UP) &&
LINK_STATE_IS_UP(iface->linkstate);
if_update(iface, ifp->mtu, ifp->flags, ifp->if_type,
ifp->linkstate, ifp->baudrate, ifp->rdomain);
isvalid = (iface->flags & IFF_UP) &&
LINK_STATE_IS_UP(iface->linkstate);
if (wasvalid == isvalid)
break;
if (isvalid) {
if_fsm(iface, IF_EVT_UP);
log_warnx("interface %s up", iface->name);
} else {
if_fsm(iface, IF_EVT_DOWN);
log_warnx("interface %s down", iface->name);
}
break;
case IMSG_IFADDRNEW:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct ifaddrchange))
fatalx("IFADDRNEW imsg with wrong len");
ifc = imsg.data;
iface = if_find(ifc->ifindex);
if (iface == NULL)
fatalx("IFADDRNEW interface lost in ospfe");
if ((ia = calloc(1, sizeof(struct iface_addr))) ==
NULL)
fatal("ospfe_dispatch_main IFADDRNEW");
ia->addr = ifc->addr;
ia->dstbrd = ifc->dstbrd;
ia->prefixlen = ifc->prefixlen;
TAILQ_INSERT_TAIL(&iface->ifa_list, ia, entry);
orig_link_lsa(iface);
break;
case IMSG_IFADDRDEL:
if (imsg.hdr.len != IMSG_HEADER_SIZE +
sizeof(struct ifaddrchange))
fatalx("IFADDRDEL imsg with wrong len");
ifc = imsg.data;
iface = if_find(ifc->ifindex);
if (iface == NULL)
fatalx("IFADDRDEL interface lost in ospfe");
for (ia = TAILQ_FIRST(&iface->ifa_list); ia != NULL;
ia = nia) {
nia = TAILQ_NEXT(ia, entry);
if (IN6_ARE_ADDR_EQUAL(&ia->addr,
&ifc->addr)) {
TAILQ_REMOVE(&iface->ifa_list, ia,
entry);
free(ia);
break;
}
}
orig_link_lsa(iface);
break;
case IMSG_RECONF_CONF:
if ((noeconf = malloc(sizeof(struct ospfd_conf))) ==
NULL)
fatal(NULL);
memcpy(noeconf, imsg.data, sizeof(struct ospfd_conf));
LIST_INIT(&noeconf->area_list);
LIST_INIT(&noeconf->cand_list);
break;
case IMSG_RECONF_AREA:
if ((narea = area_new()) == NULL)
fatal(NULL);
memcpy(narea, imsg.data, sizeof(struct area));
LIST_INIT(&narea->iface_list);
LIST_INIT(&narea->nbr_list);
RB_INIT(&narea->lsa_tree);
LIST_INSERT_HEAD(&noeconf->area_list, narea, entry);
break;
case IMSG_RECONF_END:
if ((oeconf->flags & OSPFD_FLAG_STUB_ROUTER) !=
(noeconf->flags & OSPFD_FLAG_STUB_ROUTER))
stub_changed = 1;
else
stub_changed = 0;
merge_config(oeconf, noeconf);
noeconf = NULL;
if (stub_changed)
orig_rtr_lsa_all(NULL);
break;
case IMSG_CTL_KROUTE:
case IMSG_CTL_KROUTE_ADDR:
case IMSG_CTL_END:
control_imsg_relay(&imsg);
break;
case IMSG_CONTROLFD:
if ((fd = imsg_get_fd(&imsg)) == -1)
fatalx("%s: expected to receive imsg control"
"fd but didn't receive any", __func__);
/* Listen on control socket. */
control_listen(fd);
if (pledge("stdio inet mcast", NULL) == -1)
fatal("pledge");
break;
default:
log_debug("ospfe_dispatch_main: error handling imsg %d",
imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
/* this pipe is dead, so remove the event handler */
event_del(&iev->ev);
event_loopexit(NULL);
}
}
void
ospfe_dispatch_rde(int fd, short event, void *bula)
{
struct lsa_hdr lsa_hdr;
struct lsa_link lsa_link;
struct imsgev *iev = bula;
struct imsgbuf *ibuf = &iev->ibuf;
struct nbr *nbr;
struct lsa_hdr *lhp;
struct lsa_ref *ref;
struct area *area;
struct iface *iface;
struct lsa_entry *le;
struct imsg imsg;
struct abr_rtr ar;
int n, noack = 0, shut = 0;
u_int16_t l, age;
if (event & EV_READ) {
if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
fatal("imsg_read error");
if (n == 0) /* connection closed */
shut = 1;
}
if (event & EV_WRITE) {
if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
fatal("msgbuf_write");
if (n == 0) /* connection closed */
shut = 1;
}
for (;;) {
if ((n = imsg_get(ibuf, &imsg)) == -1)
fatal("ospfe_dispatch_rde: imsg_get error");
if (n == 0)
break;
switch (imsg.hdr.type) {
case IMSG_DD:
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
/* put these on my ls_req_list for retrieval */
lhp = lsa_hdr_new();
memcpy(lhp, imsg.data, sizeof(*lhp));
ls_req_list_add(nbr, lhp);
break;
case IMSG_DD_END:
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
nbr->dd_pending--;
if (nbr->dd_pending == 0 && nbr->state & NBR_STA_LOAD) {
if (ls_req_list_empty(nbr))
nbr_fsm(nbr, NBR_EVT_LOAD_DONE);
else
start_ls_req_tx_timer(nbr);
}
break;
case IMSG_DB_SNAPSHOT:
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
if (nbr->state != NBR_STA_SNAP) /* discard */
break;
/* add LSA header to the neighbor db_sum_list */
lhp = lsa_hdr_new();
memcpy(lhp, imsg.data, sizeof(*lhp));
db_sum_list_add(nbr, lhp);
break;
case IMSG_DB_END:
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
nbr->dd_snapshot = 0;
if (nbr->state != NBR_STA_SNAP)
break;
/* snapshot done, start tx of dd packets */
nbr_fsm(nbr, NBR_EVT_SNAP_DONE);
break;
case IMSG_LS_FLOOD:
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
l = imsg.hdr.len - IMSG_HEADER_SIZE;
if (l < sizeof(lsa_hdr))
fatalx("ospfe_dispatch_rde: "
"bad imsg size");
memcpy(&lsa_hdr, imsg.data, sizeof(lsa_hdr));
ref = lsa_cache_add(imsg.data, l);
if (lsa_hdr.type == htons(LSA_TYPE_EXTERNAL)) {
/*
* flood on all areas but stub areas and
* virtual links
*/
LIST_FOREACH(area, &oeconf->area_list, entry) {
if (area->stub)
continue;
LIST_FOREACH(iface, &area->iface_list,
entry) {
noack += lsa_flood(iface, nbr,
&lsa_hdr, imsg.data);
}
}
} else if (lsa_hdr.type == htons(LSA_TYPE_LINK)) {
/*
* Save link-LSA options of neighbor.
* This is needed to originate network-LSA.
*/
if (l - sizeof(lsa_hdr) < sizeof(lsa_link))
fatalx("ospfe_dispatch_rde: "
"bad imsg link size");
memcpy(&lsa_link, (char *)imsg.data +
sizeof(lsa_hdr), sizeof(lsa_link));
nbr->link_options = lsa_link.opts &
htonl(LSA_24_MASK);
/*
* flood on interface only
*/
noack += lsa_flood(nbr->iface, nbr,
&lsa_hdr, imsg.data);
} else {
/*
* flood on all area interfaces on
* area 0.0.0.0 include also virtual links.
*/
LIST_FOREACH(iface,
&nbr->iface->area->iface_list, entry) {
noack += lsa_flood(iface, nbr,
&lsa_hdr, imsg.data);
}
/* XXX virtual links */
}
/* remove from ls_req_list */
le = ls_req_list_get(nbr, &lsa_hdr);
if (!(nbr->state & NBR_STA_FULL) && le != NULL) {
ls_req_list_free(nbr, le);
/*
* XXX no need to ack requested lsa
* the problem is that the RFC is very
* unclear about this.
*/
noack = 1;
}
if (!noack && nbr->iface != NULL &&
nbr->iface->self != nbr) {
if (!(nbr->iface->state & IF_STA_BACKUP) ||
nbr->iface->dr == nbr) {
/* delayed ack */
lhp = lsa_hdr_new();
memcpy(lhp, &lsa_hdr, sizeof(*lhp));
ls_ack_list_add(nbr->iface, lhp);
}
}
lsa_cache_put(ref, nbr);
break;
case IMSG_LS_UPD:
case IMSG_LS_SNAP:
/*
* IMSG_LS_UPD is used in two cases:
* 1. as response to ls requests
* 2. as response to ls updates where the DB
* is newer then the sent LSA
* IMSG_LS_SNAP is used in one case:
* in EXSTART when the LSA has age MaxAge
*/
l = imsg.hdr.len - IMSG_HEADER_SIZE;
if (l < sizeof(lsa_hdr))
fatalx("ospfe_dispatch_rde: "
"bad imsg size");
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
if (nbr->iface->self == nbr)
break;
if (imsg.hdr.type == IMSG_LS_SNAP &&
nbr->state != NBR_STA_SNAP)
break;
memcpy(&age, imsg.data, sizeof(age));
ref = lsa_cache_add(imsg.data, l);
if (ntohs(age) >= MAX_AGE)
/* add to retransmit list */
ls_retrans_list_add(nbr, imsg.data, 0, 0);
else
ls_retrans_list_add(nbr, imsg.data, 0, 1);
lsa_cache_put(ref, nbr);
break;
case IMSG_LS_ACK:
/*
* IMSG_LS_ACK is used in two cases:
* 1. LSA was a duplicate
* 2. LS age is MaxAge and there is no current
* instance in the DB plus no neighbor in state
* Exchange or Loading
*/
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
if (nbr->iface->self == nbr)
break;
if (imsg.hdr.len - IMSG_HEADER_SIZE != sizeof(lsa_hdr))
fatalx("ospfe_dispatch_rde: bad imsg size");
memcpy(&lsa_hdr, imsg.data, sizeof(lsa_hdr));
/* for case one check for implied acks */
if (nbr->iface->state & IF_STA_DROTHER)
if (ls_retrans_list_del(nbr->iface->self,
&lsa_hdr) == 0)
break;
if (ls_retrans_list_del(nbr, &lsa_hdr) == 0)
break;
/* send a direct acknowledgement */
send_direct_ack(nbr->iface, nbr->addr, imsg.data,
imsg.hdr.len - IMSG_HEADER_SIZE);
break;
case IMSG_LS_BADREQ:
nbr = nbr_find_peerid(imsg.hdr.peerid);
if (nbr == NULL)
break;
if (nbr->iface->self == nbr)
fatalx("ospfe_dispatch_rde: "
"dummy neighbor got BADREQ");
nbr_fsm(nbr, NBR_EVT_BAD_LS_REQ);
break;
case IMSG_ABR_UP:
memcpy(&ar, imsg.data, sizeof(ar));
if ((iface = find_vlink(&ar)) != NULL &&
iface->state == IF_STA_DOWN)
if (if_fsm(iface, IF_EVT_UP)) {
log_debug("error starting interface %s",
iface->name);
}
break;
case IMSG_ABR_DOWN:
memcpy(&ar, imsg.data, sizeof(ar));
if ((iface = find_vlink(&ar)) != NULL &&
iface->state == IF_STA_POINTTOPOINT)
if (if_fsm(iface, IF_EVT_DOWN)) {
log_debug("error stopping interface %s",
iface->name);
}
break;
case IMSG_CTL_AREA:
case IMSG_CTL_IFACE:
case IMSG_CTL_END:
case IMSG_CTL_SHOW_DATABASE:
case IMSG_CTL_SHOW_DB_EXT:
case IMSG_CTL_SHOW_DB_LINK:
case IMSG_CTL_SHOW_DB_NET:
case IMSG_CTL_SHOW_DB_RTR:
case IMSG_CTL_SHOW_DB_INTRA:
case IMSG_CTL_SHOW_DB_SELF:
case IMSG_CTL_SHOW_DB_SUM:
case IMSG_CTL_SHOW_DB_ASBR:
case IMSG_CTL_SHOW_RIB:
case IMSG_CTL_SHOW_SUM:
case IMSG_CTL_SHOW_SUM_AREA:
control_imsg_relay(&imsg);
break;
default:
log_debug("ospfe_dispatch_rde: error handling imsg %d",
imsg.hdr.type);
break;
}
imsg_free(&imsg);
}
if (!shut)
imsg_event_add(iev);
else {
/* this pipe is dead, so remove the event handler */
event_del(&iev->ev);
event_loopexit(NULL);
}
}
struct iface *
find_vlink(struct abr_rtr *ar)
{
struct area *area;
struct iface *iface = NULL;
LIST_FOREACH(area, &oeconf->area_list, entry)
LIST_FOREACH(iface, &area->iface_list, entry)
if (iface->abr_id.s_addr == ar->abr_id.s_addr &&
iface->type == IF_TYPE_VIRTUALLINK &&
iface->area->id.s_addr == ar->area.s_addr) {
iface->dst = ar->dst_ip;
iface->addr = ar->addr;
iface->metric = ar->metric;
return (iface);
}
return (iface);
}
void
orig_rtr_lsa_all(struct area *area)
{
struct area *a;
/*
* update all router LSA in all areas except area itself,
* as this update is already running.
*/
LIST_FOREACH(a, &oeconf->area_list, entry)
if (a != area)
orig_rtr_lsa(a);
}
void
orig_rtr_lsa(struct area *area)
{
struct lsa_hdr lsa_hdr;
struct lsa_rtr lsa_rtr;
struct lsa_rtr_link rtr_link;
struct iface *iface;
struct ibuf *buf;
struct nbr *nbr, *self = NULL;
u_int32_t flags;
u_int16_t chksum;
u_int8_t border, virtual = 0;
log_debug("orig_rtr_lsa: area %s", inet_ntoa(area->id));
/* XXX IBUF_READ_SIZE */
if ((buf = ibuf_dynamic(sizeof(lsa_hdr), IBUF_READ_SIZE)) == NULL)
fatal("orig_rtr_lsa");
/* reserve space for LSA header and LSA Router header */
if (ibuf_add_zero(buf, sizeof(lsa_hdr)) == -1)
fatal("orig_rtr_lsa: ibuf_add_zero failed");
if (ibuf_add_zero(buf, sizeof(lsa_rtr)) == -1)
fatal("orig_rtr_lsa: ibuf_add_zero failed");
/* links */
LIST_FOREACH(iface, &area->iface_list, entry) {
if (self == NULL && iface->self != NULL)
self = iface->self;
bzero(&rtr_link, sizeof(rtr_link));
switch (iface->type) {
case IF_TYPE_POINTOPOINT:
LIST_FOREACH(nbr, &iface->nbr_list, entry)
if (nbr != iface->self &&
nbr->state & NBR_STA_FULL)
break;
if (nbr && iface->state & IF_STA_POINTTOPOINT) {
log_debug("orig_rtr_lsa: point-to-point, "
"interface %s", iface->name);
rtr_link.type = LINK_TYPE_POINTTOPOINT;
if (iface->dependon[0] != '\0' &&
iface->depend_ok == 0)
rtr_link.metric = MAX_METRIC;
else
rtr_link.metric = htons(iface->metric);
rtr_link.iface_id = htonl(iface->ifindex);
rtr_link.nbr_iface_id = htonl(nbr->iface_id);
rtr_link.nbr_rtr_id = nbr->id.s_addr;
if (ibuf_add(buf, &rtr_link, sizeof(rtr_link)))
fatalx("orig_rtr_lsa: ibuf_add failed");
}
continue;
case IF_TYPE_BROADCAST:
case IF_TYPE_NBMA:
if ((iface->state & IF_STA_MULTI)) {
if (iface->dr == iface->self) {
LIST_FOREACH(nbr, &iface->nbr_list,
entry)
if (nbr != iface->self &&
nbr->state & NBR_STA_FULL)
break;
} else
nbr = iface->dr;
if (nbr && nbr->state & NBR_STA_FULL) {
log_debug("orig_rtr_lsa: transit net, "
"interface %s", iface->name);
rtr_link.type = LINK_TYPE_TRANSIT_NET;
if (iface->dependon[0] != '\0' &&
iface->depend_ok == 0)
rtr_link.metric = MAX_METRIC;
else
rtr_link.metric =
htons(iface->metric);
rtr_link.iface_id = htonl(iface->ifindex);
rtr_link.nbr_iface_id = htonl(iface->dr->iface_id);
rtr_link.nbr_rtr_id = iface->dr->id.s_addr;
if (ibuf_add(buf, &rtr_link,
sizeof(rtr_link)))
fatalx("orig_rtr_lsa: "
"ibuf_add failed");
break;
}
}
break;
#if 0 /* TODO virtualllink/pointtomulti */
case IF_TYPE_VIRTUALLINK:
LIST_FOREACH(nbr, &iface->nbr_list, entry) {
if (nbr != iface->self &&
nbr->state & NBR_STA_FULL)
break;
}
if (nbr) {
rtr_link.id = nbr->id.s_addr;
//XXX rtr_link.data = iface->addr.s_addr;
rtr_link.type = LINK_TYPE_VIRTUAL;
/* RFC 3137: stub router support */
if (oeconf->flags & OSPFD_FLAG_STUB_ROUTER ||
oe_nofib)
rtr_link.metric = 0xffff;
else
rtr_link.metric = htons(iface->metric);
virtual = 1;
if (ibuf_add(buf, &rtr_link, sizeof(rtr_link)))
fatalx("orig_rtr_lsa: ibuf_add failed");
log_debug("orig_rtr_lsa: virtual link, "
"interface %s", iface->name);
}
continue;
case IF_TYPE_POINTOMULTIPOINT:
log_debug("orig_rtr_lsa: stub net, "
"interface %s", iface->name);
//XXX rtr_link.id = iface->addr.s_addr;
rtr_link.data = 0xffffffff;
rtr_link.type = LINK_TYPE_STUB_NET;
rtr_link.metric = htons(iface->metric);
if (ibuf_add(buf, &rtr_link, sizeof(rtr_link)))
fatalx("orig_rtr_lsa: ibuf_add failed");
LIST_FOREACH(nbr, &iface->nbr_list, entry) {
if (nbr != iface->self &&
nbr->state & NBR_STA_FULL) {
bzero(&rtr_link, sizeof(rtr_link));
log_debug("orig_rtr_lsa: "
"point-to-multipoint, interface %s",
iface->name);
//XXX rtr_link.id = nbr->addr.s_addr;
//XXX rtr_link.data = iface->addr.s_addr;
rtr_link.type = LINK_TYPE_POINTTOPOINT;
/* RFC 3137: stub router support */
if (oe_nofib || oeconf->flags &
OSPFD_FLAG_STUB_ROUTER)
rtr_link.metric = MAX_METRIC;
else if (iface->dependon[0] != '\0' &&
iface->dependon_ok == 0)
rtr_link.metric = MAX_METRIC;
else
rtr_link.metric =
htons(iface->metric);
if (ibuf_add(buf, &rtr_link,
sizeof(rtr_link)))
fatalx("orig_rtr_lsa: "
"ibuf_add failed");
}
}
continue;
#endif /* TODO virtualllink/pointtomulti */
default:
fatalx("orig_rtr_lsa: unknown interface type");
}
}
/* LSA router header */
lsa_rtr.opts = 0;
flags = 0;
/*
* Set the E bit as soon as an as-ext lsa may be redistributed, only
* setting it in case we redistribute something is not worth the fuss.
*/
if (oeconf->redistribute && !area->stub)
flags |= OSPF_RTR_E;
border = (area_border_router(oeconf) != 0);
if (border != oeconf->border) {
oeconf->border = border;
orig_rtr_lsa_all(area);
}
if (oeconf->border)
flags |= OSPF_RTR_B;
/* TODO set V flag if a active virtual link ends here and the
* area is the transit area for this link. */
if (virtual)
flags |= OSPF_RTR_V;
LSA_24_SETLO(lsa_rtr.opts, area_ospf_options(area));
LSA_24_SETHI(lsa_rtr.opts, flags);
lsa_rtr.opts = htonl(lsa_rtr.opts);
if (ibuf_set(buf, sizeof(lsa_hdr), &lsa_rtr, sizeof(lsa_rtr)) == -1)
fatal("orig_rtr_lsa: ibuf_set failed");
/* LSA header */
lsa_hdr.age = htons(DEFAULT_AGE);
lsa_hdr.type = htons(LSA_TYPE_ROUTER);
/* XXX needs to be fixed if multiple router-lsa need to be announced */
lsa_hdr.ls_id = 0;
lsa_hdr.adv_rtr = oeconf->rtr_id.s_addr;
lsa_hdr.seq_num = htonl(INIT_SEQ_NUM);
lsa_hdr.len = htons(ibuf_size(buf));
lsa_hdr.ls_chksum = 0; /* updated later */
if (ibuf_set(buf, 0, &lsa_hdr, sizeof(lsa_hdr)) == -1)
fatal("orig_rtr_lsa: ibuf_set failed");
chksum = iso_cksum(ibuf_data(buf), ibuf_size(buf), LS_CKSUM_OFFSET);
if (ibuf_set_n16(buf, LS_CKSUM_OFFSET, chksum) == -1)
fatal("orig_rtr_lsa: ibuf_set_n16 failed");
if (self)
imsg_compose_event(iev_rde, IMSG_LS_UPD, self->peerid, 0,
-1, ibuf_data(buf), ibuf_size(buf));
else
log_warnx("orig_rtr_lsa: empty area %s",
inet_ntoa(area->id));
ibuf_free(buf);
}
void
orig_net_lsa(struct iface *iface)
{
struct lsa_hdr lsa_hdr;
struct nbr *nbr;
struct ibuf *buf;
struct lsa_net lsa_net;
int num_rtr = 0;
u_int16_t chksum;
/* XXX IBUF_READ_SIZE */
if ((buf = ibuf_dynamic(sizeof(lsa_hdr), IBUF_READ_SIZE)) == NULL)
fatal("orig_net_lsa");
/* reserve space for LSA header and options field */
if (ibuf_add_zero(buf, sizeof(lsa_hdr) + sizeof(lsa_net)) == -1)
fatal("orig_net_lsa: ibuf_add_zero failed");
lsa_net.opts = 0;
/* fully adjacent neighbors + self */
LIST_FOREACH(nbr, &iface->nbr_list, entry)
if (nbr->state & NBR_STA_FULL) {
if (ibuf_add(buf, &nbr->id, sizeof(nbr->id)))
fatal("orig_net_lsa: ibuf_add failed");
lsa_net.opts |= nbr->link_options;
num_rtr++;
}
if (num_rtr == 1) {
/* non transit net therefore no need to generate a net lsa */
ibuf_free(buf);
return;
}
/* LSA header */
if (iface->state & IF_STA_DR)
lsa_hdr.age = htons(DEFAULT_AGE);
else
lsa_hdr.age = htons(MAX_AGE);
lsa_hdr.type = htons(LSA_TYPE_NETWORK);
/* for network LSAs, the link state ID equals the interface ID */
lsa_hdr.ls_id = htonl(iface->ifindex);
lsa_hdr.adv_rtr = oeconf->rtr_id.s_addr;
lsa_hdr.seq_num = htonl(INIT_SEQ_NUM);
lsa_hdr.len = htons(ibuf_size(buf));
lsa_hdr.ls_chksum = 0; /* updated later */
if (ibuf_set(buf, 0, &lsa_hdr, sizeof(lsa_hdr)) == -1)
fatal("orig_net_lsa: ibuf_set failed");
lsa_net.opts &= lsa_net.opts & htonl(LSA_24_MASK);
if (ibuf_set(buf, sizeof(lsa_hdr), &lsa_net, sizeof(lsa_net)) == -1)
fatal("orig_net_lsa: ibuf_set failed");
chksum = iso_cksum(ibuf_data(buf), ibuf_size(buf), LS_CKSUM_OFFSET);
if (ibuf_set_n16(buf, LS_CKSUM_OFFSET, chksum) == -1)
fatal("orig_net_lsa: ibuf_set_n16 failed");
imsg_compose_event(iev_rde, IMSG_LS_UPD, iface->self->peerid, 0,
-1, ibuf_data(buf), ibuf_size(buf));
ibuf_free(buf);
}
void
orig_link_lsa(struct iface *iface)
{
struct lsa_hdr lsa_hdr;
struct lsa_link lsa_link;
struct lsa_prefix lsa_prefix;
struct ibuf *buf;
struct iface_addr *ia;
struct in6_addr prefix;
unsigned int num_prefix = 0;
u_int16_t chksum;
u_int32_t options;
log_debug("orig_link_lsa: interface %s", iface->name);
switch (iface->type) {
case IF_TYPE_VIRTUALLINK: /* forbidden by rfc5340 */
return;
case IF_TYPE_BROADCAST:
case IF_TYPE_NBMA:
if ((iface->state & IF_STA_MULTI) == 0)
return;
break;
case IF_TYPE_POINTOPOINT:
case IF_TYPE_POINTOMULTIPOINT:
if ((iface->state & IF_STA_POINTTOPOINT) == 0)
return;
break;
default:
fatalx("orig_link_lsa: unknown interface type");
}
/* XXX IBUF_READ_SIZE */
if ((buf = ibuf_dynamic(sizeof(lsa_hdr) + sizeof(lsa_link),
IBUF_READ_SIZE)) == NULL)
fatal("orig_link_lsa");
/* reserve space for LSA header and LSA link header */
if (ibuf_add_zero(buf, sizeof(lsa_hdr) + sizeof(lsa_link)) == -1)
fatal("orig_link_lsa: ibuf_add_zero failed");
/* link-local address, and all prefixes configured on interface */
TAILQ_FOREACH(ia, &iface->ifa_list, entry) {
if (IN6_IS_ADDR_LINKLOCAL(&ia->addr)) {
log_debug("orig_link_lsa: link local address %s",
log_in6addr(&ia->addr));
lsa_link.lladdr = ia->addr;
continue;
}
lsa_prefix.prefixlen = ia->prefixlen;
lsa_prefix.options = 0;
lsa_prefix.metric = 0;
inet6applymask(&prefix, &ia->addr, ia->prefixlen);
log_debug("orig_link_lsa: prefix %s", log_in6addr(&prefix));
if (ibuf_add(buf, &lsa_prefix, sizeof(lsa_prefix)))
fatal("orig_link_lsa: ibuf_add failed");
if (ibuf_add(buf, &prefix.s6_addr[0],
LSA_PREFIXSIZE(ia->prefixlen)))
fatal("orig_link_lsa: ibuf_add failed");
num_prefix++;
}
/* LSA link header (lladdr has already been filled in above) */
LSA_24_SETHI(lsa_link.opts, iface->priority);
options = area_ospf_options(iface->area);
LSA_24_SETLO(lsa_link.opts, options);
lsa_link.opts = htonl(lsa_link.opts);
lsa_link.numprefix = htonl(num_prefix);
if (ibuf_set(buf, sizeof(lsa_hdr), &lsa_link, sizeof(lsa_link)) == -1)
fatal("orig_link_lsa: ibuf_set failed");
/* LSA header */
lsa_hdr.age = htons(DEFAULT_AGE);
lsa_hdr.type = htons(LSA_TYPE_LINK);
/* for link LSAs, the link state ID equals the interface ID */
lsa_hdr.ls_id = htonl(iface->ifindex);
lsa_hdr.adv_rtr = oeconf->rtr_id.s_addr;
lsa_hdr.seq_num = htonl(INIT_SEQ_NUM);
lsa_hdr.len = htons(ibuf_size(buf));
lsa_hdr.ls_chksum = 0; /* updated later */
if (ibuf_set(buf, 0, &lsa_hdr, sizeof(lsa_hdr)) == -1)
fatal("orig_link_lsa: ibuf_set failed");
chksum = iso_cksum(ibuf_data(buf), ibuf_size(buf), LS_CKSUM_OFFSET);
if (ibuf_set_n16(buf, LS_CKSUM_OFFSET, chksum) == -1)
fatal("orig_link_lsa: ibuf_set_n16 failed");
imsg_compose_event(iev_rde, IMSG_LS_UPD, iface->self->peerid, 0,
-1, ibuf_data(buf), ibuf_size(buf));
ibuf_free(buf);
}
u_int32_t
ospfe_router_id(void)
{
return (oeconf->rtr_id.s_addr);
}
void
ospfe_fib_update(int type)
{
int old = oe_nofib;
if (type == IMSG_CTL_FIB_COUPLE)
oe_nofib = 0;
if (type == IMSG_CTL_FIB_DECOUPLE)
oe_nofib = 1;
if (old != oe_nofib)
orig_rtr_lsa_all(NULL);
}
void
ospfe_iface_ctl(struct ctl_conn *c, unsigned int idx)
{
struct area *area;
struct iface *iface;
struct ctl_iface *ictl;
LIST_FOREACH(area, &oeconf->area_list, entry)
LIST_FOREACH(iface, &area->iface_list, entry)
if (idx == 0 || idx == iface->ifindex) {
ictl = if_to_ctl(iface);
imsg_compose_event(&c->iev,
IMSG_CTL_SHOW_INTERFACE, 0, 0, -1,
ictl, sizeof(struct ctl_iface));
}
}
void
ospfe_nbr_ctl(struct ctl_conn *c)
{
struct area *area;
struct iface *iface;
struct nbr *nbr;
struct ctl_nbr *nctl;
LIST_FOREACH(area, &oeconf->area_list, entry)
LIST_FOREACH(iface, &area->iface_list, entry)
LIST_FOREACH(nbr, &iface->nbr_list, entry) {
if (iface->self != nbr) {
nctl = nbr_to_ctl(nbr);
imsg_compose_event(&c->iev,
IMSG_CTL_SHOW_NBR, 0, 0, -1, nctl,
sizeof(struct ctl_nbr));
}
}
imsg_compose_event(&c->iev, IMSG_CTL_END, 0, 0, -1, NULL, 0);
}
void
ospfe_demote_area(struct area *area, int active)
{
struct demote_msg dmsg;
if (ospfd_process != PROC_OSPF_ENGINE ||
area->demote_group[0] == '\0')
return;
bzero(&dmsg, sizeof(dmsg));
strlcpy(dmsg.demote_group, area->demote_group,
sizeof(dmsg.demote_group));
dmsg.level = area->demote_level;
if (active)
dmsg.level = -dmsg.level;
ospfe_imsg_compose_parent(IMSG_DEMOTE, 0, &dmsg, sizeof(dmsg));
}
void
ospfe_demote_iface(struct iface *iface, int active)
{
struct demote_msg dmsg;
if (ospfd_process != PROC_OSPF_ENGINE ||
iface->demote_group[0] == '\0')
return;
bzero(&dmsg, sizeof(dmsg));
strlcpy(dmsg.demote_group, iface->demote_group,
sizeof(dmsg.demote_group));
if (active)
dmsg.level = -1;
else
dmsg.level = 1;
log_warnx("ospfe_demote_iface: group %s level %d", dmsg.demote_group,
dmsg.level);
ospfe_imsg_compose_parent(IMSG_DEMOTE, 0, &dmsg, sizeof(dmsg));
}
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