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Babel: Update to new timers

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This commit is contained in:
Ondrej Zajicek (work) 2017-10-13 12:34:08 +02:00
parent 6b5cd7c05f
commit 8b58f565e4
4 changed files with 136 additions and 125 deletions
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184
proto/babel/babel.c
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@ -70,7 +70,7 @@ babel_init_entry(void *E)
{
struct babel_entry *e = E;
e->updated = now;
e->updated = current_time();
init_list(&e->sources);
init_list(&e->routes);
}
@ -114,7 +114,7 @@ babel_get_source(struct babel_entry *e, u64 router_id)
s = sl_alloc(p->source_slab);
s->router_id = router_id;
s->expires = now + BABEL_GARBAGE_INTERVAL;
s->expires = current_time() + BABEL_GARBAGE_INTERVAL;
s->seqno = 0;
s->metric = BABEL_INFINITY;
add_tail(&e->sources, NODE s);
@ -127,10 +127,11 @@ babel_expire_sources(struct babel_entry *e)
{
struct babel_proto *p = e->proto;
struct babel_source *n, *nx;
btime now_ = current_time();
WALK_LIST_DELSAFE(n, nx, e->sources)
{
if (n->expires && n->expires <= now)
if (n->expires && n->expires <= now_)
{
rem_node(NODE n);
sl_free(p->source_slab, n);
@ -167,7 +168,7 @@ babel_get_route(struct babel_entry *e, struct babel_neighbor *nbr)
if (nbr)
{
r->neigh = nbr;
r->expires = now + BABEL_GARBAGE_INTERVAL;
r->expires = current_time() + BABEL_GARBAGE_INTERVAL;
add_tail(&nbr->routes, NODE &r->neigh_route);
}
@ -208,7 +209,7 @@ babel_expire_route(struct babel_route *r)
if (r->metric < BABEL_INFINITY)
{
r->metric = BABEL_INFINITY;
r->expires = now + r->expiry_interval;
r->expires = current_time() + r->expiry_interval;
}
else
{
@ -230,6 +231,7 @@ babel_expire_routes_(struct babel_proto *p UNUSED, struct fib *rtable)
{
struct babel_route *r, *rx;
struct fib_iterator fit;
btime now_ = current_time();
FIB_ITERATE_INIT(&fit, rtable);
@ -240,10 +242,10 @@ loop:
WALK_LIST_DELSAFE(r, rx, e->routes)
{
if (r->refresh_time && r->refresh_time <= now)
if (r->refresh_time && r->refresh_time <= now_)
babel_refresh_route(r);
if (r->expires && r->expires <= now)
if (r->expires && r->expires <= now_)
{
babel_expire_route(r);
changed = 1;
@ -360,15 +362,16 @@ babel_expire_neighbors(struct babel_proto *p)
{
struct babel_iface *ifa;
struct babel_neighbor *nbr, *nbx;
btime now_ = current_time();
WALK_LIST(ifa, p->interfaces)
{
WALK_LIST_DELSAFE(nbr, nbx, ifa->neigh_list)
{
if (nbr->ihu_expiry && nbr->ihu_expiry <= now)
if (nbr->ihu_expiry && nbr->ihu_expiry <= now_)
babel_expire_ihu(nbr);
if (nbr->hello_expiry && nbr->hello_expiry <= now)
if (nbr->hello_expiry && nbr->hello_expiry <= now_)
babel_expire_hello(nbr);
}
}
@ -546,7 +549,7 @@ babel_select_route(struct babel_entry *e)
e->n.addr, cur->router_id, cur->metric);
e->selected_in = cur;
e->updated = now;
e->updated = current_time();
babel_announce_rte(p, e);
}
else if (!cur || cur->metric == BABEL_INFINITY)
@ -562,7 +565,7 @@ babel_select_route(struct babel_entry *e)
e->n.addr);
e->selected_in->metric = BABEL_INFINITY;
e->updated = now;
e->updated = current_time();
babel_send_seqno_request(e);
babel_announce_rte(p, e);
@ -580,7 +583,7 @@ babel_select_route(struct babel_entry *e)
TRACE(D_EVENTS, "Flushing route for prefix %N", e->n.addr);
e->selected_in = NULL;
e->updated = now;
e->updated = current_time();
babel_announce_rte(p, e);
}
}
@ -614,8 +617,8 @@ babel_build_ihu(union babel_msg *msg, struct babel_iface *ifa, struct babel_neig
msg->ihu.rxcost = babel_compute_rxcost(n);
msg->ihu.interval = ifa->cf->ihu_interval;
TRACE(D_PACKETS, "Sending IHU for %I with rxcost %d interval %d",
msg->ihu.addr, msg->ihu.rxcost, msg->ihu.interval);
TRACE(D_PACKETS, "Sending IHU for %I with rxcost %d interval %t",
msg->ihu.addr, msg->ihu.rxcost, (btime) msg->ihu.interval);
}
static void
@ -648,8 +651,8 @@ babel_send_hello(struct babel_iface *ifa, u8 send_ihu)
msg.hello.seqno = ifa->hello_seqno++;
msg.hello.interval = ifa->cf->hello_interval;
TRACE(D_PACKETS, "Sending hello on %s with seqno %d interval %d",
ifa->ifname, msg.hello.seqno, msg.hello.interval);
TRACE(D_PACKETS, "Sending hello on %s with seqno %d interval %t",
ifa->ifname, msg.hello.seqno, (btime) msg.hello.interval);
babel_enqueue(&msg, ifa);
@ -750,7 +753,7 @@ babel_unicast_seqno_request(struct babel_route *r)
* transmitted entry is updated.
*/
static void
babel_send_update_(struct babel_iface *ifa, bird_clock_t changed, struct fib *rtable)
babel_send_update_(struct babel_iface *ifa, btime changed, struct fib *rtable)
{
struct babel_proto *p = ifa->proto;
@ -766,7 +769,7 @@ babel_send_update_(struct babel_iface *ifa, bird_clock_t changed, struct fib *rt
if ((r->router_id == p->router_id) && (r->seqno < p->update_seqno))
{
r->seqno = p->update_seqno;
e->updated = now;
e->updated = current_time();
}
/* Skip routes that weren't updated since 'changed' time */
@ -793,7 +796,7 @@ babel_send_update_(struct babel_iface *ifa, bird_clock_t changed, struct fib *rt
if (!OUR_ROUTE(r))
{
struct babel_source *s = babel_get_source(e, r->router_id);
s->expires = now + BABEL_GARBAGE_INTERVAL;
s->expires = current_time() + BABEL_GARBAGE_INTERVAL;
if ((msg.update.seqno > s->seqno) ||
((msg.update.seqno == s->seqno) && (msg.update.metric < s->metric)))
@ -807,7 +810,7 @@ babel_send_update_(struct babel_iface *ifa, bird_clock_t changed, struct fib *rt
}
static void
babel_send_update(struct babel_iface *ifa, bird_clock_t changed)
babel_send_update(struct babel_iface *ifa, btime changed)
{
struct babel_proto *p = ifa->proto;
@ -827,7 +830,7 @@ babel_trigger_iface_update(struct babel_iface *ifa)
TRACE(D_EVENTS, "Scheduling triggered updates for %s seqno %d",
ifa->iface->name, p->update_seqno);
ifa->want_triggered = now;
ifa->want_triggered = current_time();
babel_iface_kick_timer(ifa);
}
@ -887,7 +890,7 @@ babel_send_wildcard_retraction(struct babel_iface *ifa)
/* Update hello history according to Appendix A1 of the RFC */
static void
babel_update_hello_history(struct babel_neighbor *n, u16 seqno, u16 interval)
babel_update_hello_history(struct babel_neighbor *n, u16 seqno, uint interval)
{
/*
* Compute the difference between expected and received seqno (modulo 2^16).
@ -925,16 +928,18 @@ babel_update_hello_history(struct babel_neighbor *n, u16 seqno, u16 interval)
n->hello_map = (n->hello_map << 1) | 1;
n->next_hello_seqno = seqno+1;
if (n->hello_cnt < 16) n->hello_cnt++;
n->hello_expiry = now + BABEL_HELLO_EXPIRY_FACTOR(interval);
n->hello_expiry = current_time() + BABEL_HELLO_EXPIRY_FACTOR(interval);
}
static void
babel_expire_seqno_requests(struct babel_proto *p)
{
btime now_ = current_time();
struct babel_seqno_request *n, *nx;
WALK_LIST_DELSAFE(n, nx, p->seqno_cache)
{
if ((n->updated + BABEL_SEQNO_REQUEST_EXPIRY) <= now)
if ((n->updated + BABEL_SEQNO_REQUEST_EXPIRY) <= now_)
{
rem_node(NODE n);
sl_free(p->seqno_slab, n);
@ -963,7 +968,7 @@ babel_cache_seqno_request(struct babel_proto *p, net_addr *n,
net_copy(&r->net, n);
r->router_id = router_id;
r->seqno = seqno;
r->updated = now;
r->updated = current_time();
add_tail(&p->seqno_cache, NODE r);
return 1;
@ -1013,8 +1018,8 @@ babel_handle_ack_req(union babel_msg *m, struct babel_iface *ifa)
struct babel_proto *p = ifa->proto;
struct babel_msg_ack_req *msg = &m->ack_req;
TRACE(D_PACKETS, "Handling ACK request nonce %d interval %d",
msg->nonce, msg->interval);
TRACE(D_PACKETS, "Handling ACK request nonce %d interval %t",
msg->nonce, (btime) msg->interval);
babel_send_ack(ifa, msg->sender, msg->nonce);
}
@ -1025,8 +1030,8 @@ babel_handle_hello(union babel_msg *m, struct babel_iface *ifa)
struct babel_proto *p = ifa->proto;
struct babel_msg_hello *msg = &m->hello;
TRACE(D_PACKETS, "Handling hello seqno %d interval %d",
msg->seqno, msg->interval);
TRACE(D_PACKETS, "Handling hello seqno %d interval %t",
msg->seqno, (btime) msg->interval);
struct babel_neighbor *n = babel_get_neighbor(ifa, msg->sender);
babel_update_hello_history(n, msg->seqno, msg->interval);
@ -1044,12 +1049,12 @@ babel_handle_ihu(union babel_msg *m, struct babel_iface *ifa)
if ((msg->ae != BABEL_AE_WILDCARD) && !ipa_equal(msg->addr, ifa->addr))
return;
TRACE(D_PACKETS, "Handling IHU rxcost %d interval %d",
msg->rxcost, msg->interval);
TRACE(D_PACKETS, "Handling IHU rxcost %d interval %t",
msg->rxcost, (btime) msg->interval);
struct babel_neighbor *n = babel_get_neighbor(ifa, msg->sender);
n->txcost = msg->rxcost;
n->ihu_expiry = now + BABEL_IHU_EXPIRY_FACTOR(msg->interval);
n->ihu_expiry = current_time() + BABEL_IHU_EXPIRY_FACTOR(msg->interval);
}
/**
@ -1214,9 +1219,9 @@ babel_handle_update(union babel_msg *m, struct babel_iface *ifa)
r->seqno = msg->seqno;
r->expiry_interval = BABEL_ROUTE_EXPIRY_FACTOR(msg->interval);
r->expires = now + r->expiry_interval;
r->expires = current_time() + r->expiry_interval;
if (r->expiry_interval > BABEL_ROUTE_REFRESH_INTERVAL)
r->refresh_time = now + r->expiry_interval - BABEL_ROUTE_REFRESH_INTERVAL;
r->refresh_time = current_time() + r->expiry_interval - BABEL_ROUTE_REFRESH_INTERVAL;
/* If the route is not feasible at this point, it means it is from another
neighbour than the one currently selected; so send a unicast seqno
@ -1256,7 +1261,7 @@ babel_handle_route_request(union babel_msg *m, struct babel_iface *ifa)
else
{
babel_trigger_iface_update(ifa);
e->updated = now;
e->updated = current_time();
}
}
@ -1283,7 +1288,7 @@ babel_handle_seqno_request(union babel_msg *m, struct babel_iface *ifa)
if ((r->router_id != msg->router_id) || ge_mod64k(r->seqno, msg->seqno))
{
babel_trigger_iface_update(ifa);
e->updated = now;
e->updated = current_time();
return;
}
@ -1333,42 +1338,44 @@ babel_iface_timer(timer *t)
{
struct babel_iface *ifa = t->data;
struct babel_proto *p = ifa->proto;
bird_clock_t hello_period = ifa->cf->hello_interval;
bird_clock_t update_period = ifa->cf->update_interval;
btime hello_period = ifa->cf->hello_interval;
btime update_period = ifa->cf->update_interval;
btime now_ = current_time();
if (now >= ifa->next_hello)
if (now_ >= ifa->next_hello)
{
babel_send_hello(ifa, (ifa->cf->type == BABEL_IFACE_TYPE_WIRELESS ||
ifa->hello_seqno % BABEL_IHU_INTERVAL_FACTOR == 0));
ifa->next_hello += hello_period * (1 + (now - ifa->next_hello) / hello_period);
ifa->next_hello += hello_period * (1 + (now_ - ifa->next_hello) / hello_period);
}
if (now >= ifa->next_regular)
if (now_ >= ifa->next_regular)
{
TRACE(D_EVENTS, "Sending regular updates on %s", ifa->ifname);
babel_send_update(ifa, 0);
ifa->next_regular += update_period * (1 + (now - ifa->next_regular) / update_period);
ifa->next_regular += update_period * (1 + (now_ - ifa->next_regular) / update_period);
ifa->want_triggered = 0;
p->triggered = 0;
}
else if (ifa->want_triggered && (now >= ifa->next_triggered))
else if (ifa->want_triggered && (now_ >= ifa->next_triggered))
{
TRACE(D_EVENTS, "Sending triggered updates on %s", ifa->ifname);
babel_send_update(ifa, ifa->want_triggered);
ifa->next_triggered = now + MIN(5, update_period / 2 + 1);
ifa->next_triggered = now_ + MIN(5 S, update_period / 2);
ifa->want_triggered = 0;
p->triggered = 0;
}
bird_clock_t next_event = MIN(ifa->next_hello, ifa->next_regular);
tm_start(ifa->timer, ifa->want_triggered ? 1 : (next_event - now));
btime next_event = MIN(ifa->next_hello, ifa->next_regular);
if (ifa->want_triggered) next_event = MIN(next_event, ifa->next_triggered);
tm2_set(ifa->timer, next_event);
}
static inline void
babel_iface_kick_timer(struct babel_iface *ifa)
{
if (ifa->timer->expires TO_S > (now + 1))
tm_start(ifa->timer, 1);
if (ifa->timer->expires > (current_time() + 100 MS))
tm2_start(ifa->timer, 100 MS);
}
static void
@ -1378,11 +1385,11 @@ babel_iface_start(struct babel_iface *ifa)
TRACE(D_EVENTS, "Starting interface %s", ifa->ifname);
ifa->next_hello = now + (random() % ifa->cf->hello_interval) + 1;
ifa->next_regular = now + (random() % ifa->cf->update_interval) + 1;
ifa->next_triggered = now + MIN(5, ifa->cf->update_interval / 2 + 1);
ifa->next_hello = current_time() + (random() % ifa->cf->hello_interval);
ifa->next_regular = current_time() + (random() % ifa->cf->update_interval);
ifa->next_triggered = current_time() + MIN(5 S, ifa->cf->update_interval / 2);
ifa->want_triggered = 0; /* We send an immediate update (below) */
tm_start(ifa->timer, 1);
tm2_start(ifa->timer, 100 MS);
ifa->up = 1;
babel_send_hello(ifa, 0);
@ -1398,6 +1405,7 @@ babel_iface_stop(struct babel_iface *ifa)
struct babel_neighbor *nbr;
struct babel_route *r;
node *n;
btime now_ = current_time();
TRACE(D_EVENTS, "Stopping interface %s", ifa->ifname);
@ -1412,12 +1420,12 @@ babel_iface_stop(struct babel_iface *ifa)
{
r = SKIP_BACK(struct babel_route, neigh_route, n);
r->metric = BABEL_INFINITY;
r->expires = now + r->expiry_interval;
r->expires = now_ + r->expiry_interval;
babel_select_route(r->e);
}
}
tm_stop(ifa->timer);
tm2_stop(ifa->timer);
ifa->up = 0;
}
@ -1515,7 +1523,7 @@ babel_add_iface(struct babel_proto *p, struct iface *new, struct babel_iface_con
init_list(&ifa->neigh_list);
ifa->hello_seqno = 1;
ifa->timer = tm_new_set(ifa->pool, babel_iface_timer, ifa, 0, 0);
ifa->timer = tm2_new_init(ifa->pool, babel_iface_timer, ifa, 0, 0);
init_list(&ifa->msg_queue);
ifa->send_event = ev_new(ifa->pool);
@ -1614,11 +1622,11 @@ babel_reconfigure_iface(struct babel_proto *p, struct babel_iface *ifa, struct b
if (ipa_zero(ifa->next_hop_ip4) && p->ip4_channel)
log(L_WARN "%s: Cannot find IPv4 next hop addr on %s", p->p.name, ifa->ifname);
if (ifa->next_hello > (now + new->hello_interval))
ifa->next_hello = now + (random() % new->hello_interval) + 1;
if (ifa->next_hello > (current_time() + new->hello_interval))
ifa->next_hello = current_time() + (random() % new->hello_interval);
if (ifa->next_regular > (now + new->update_interval))
ifa->next_regular = now + (random() % new->update_interval) + 1;
if (ifa->next_regular > (current_time() + new->update_interval))
ifa->next_regular = current_time() + (random() % new->update_interval);
if ((new->tx_length != old->tx_length) || (new->rx_buffer != old->rx_buffer))
babel_iface_update_buffers(ifa);
@ -1680,18 +1688,19 @@ babel_reconfigure_ifaces(struct babel_proto *p, struct babel_config *cf)
static void
babel_dump_source(struct babel_source *s)
{
debug("Source router_id %lR seqno %d metric %d expires %d\n",
s->router_id, s->seqno, s->metric, s->expires ? s->expires-now : 0);
debug("Source router_id %lR seqno %d metric %d expires %t\n",
s->router_id, s->seqno, s->metric,
s->expires ? s->expires - current_time() : 0);
}
static void
babel_dump_route(struct babel_route *r)
{
debug("Route neigh %I if %s seqno %d metric %d/%d router_id %lR expires %d\n",
debug("Route neigh %I if %s seqno %d metric %d/%d router_id %lR expires %t\n",
r->neigh ? r->neigh->addr : IPA_NONE,
r->neigh ? r->neigh->ifa->ifname : "(none)",
r->seqno, r->advert_metric, r->metric,
r->router_id, r->expires ? r->expires-now : 0);
r->seqno, r->advert_metric, r->metric, r->router_id,
r->expires ? r->expires - current_time() : 0);
}
static void
@ -1717,10 +1726,10 @@ babel_dump_entry(struct babel_entry *e)
static void
babel_dump_neighbor(struct babel_neighbor *n)
{
debug("Neighbor %I txcost %d hello_map %x next seqno %d expires %d/%d\n",
debug("Neighbor %I txcost %d hello_map %x next seqno %d expires %t/%t\n",
n->addr, n->txcost, n->hello_map, n->next_hello_seqno,
n->hello_expiry ? n->hello_expiry - now : 0,
n->ihu_expiry ? n->ihu_expiry - now : 0);
n->hello_expiry ? n->hello_expiry - current_time() : 0,
n->ihu_expiry ? n->ihu_expiry - current_time() : 0);
}
static void
@ -1728,7 +1737,7 @@ babel_dump_iface(struct babel_iface *ifa)
{
struct babel_neighbor *n;
debug("Babel: Interface %s addr %I rxcost %d type %d hello seqno %d intervals %d %d",
debug("Babel: Interface %s addr %I rxcost %d type %d hello seqno %d intervals %t %t",
ifa->ifname, ifa->addr, ifa->cf->rxcost, ifa->cf->type, ifa->hello_seqno,
ifa->cf->hello_interval, ifa->cf->update_interval);
debug(" next hop v4 %I next hop v6 %I\n", ifa->next_hop_ip4, ifa->next_hop_ip6);
@ -1803,7 +1812,7 @@ babel_show_interfaces(struct proto *P, char *iff)
}
cli_msg(-1023, "%s:", p->p.name);
cli_msg(-1023, "%-10s %-6s %7s %6s %6s %-15s %s",
cli_msg(-1023, "%-10s %-6s %7s %6s %7s %-15s %s",
"Interface", "State", "RX cost", "Nbrs", "Timer",
"Next hop (v4)", "Next hop (v6)");
@ -1816,8 +1825,8 @@ babel_show_interfaces(struct proto *P, char *iff)
WALK_LIST(nbr, ifa->neigh_list)
nbrs++;
int timer = MIN(ifa->next_regular, ifa->next_hello) - now;
cli_msg(-1023, "%-10s %-6s %7u %6u %6u %-15I %I",
btime timer = MIN(ifa->next_regular, ifa->next_hello) - current_time();
cli_msg(-1023, "%-10s %-6s %7u %6u %7t %-15I %I",
ifa->iface->name, (ifa->up ? "Up" : "Down"),
ifa->cf->rxcost, nbrs, MAX(timer, 0),
ifa->next_hop_ip4, ifa->next_hop_ip6);
@ -1842,8 +1851,8 @@ babel_show_neighbors(struct proto *P, char *iff)
}
cli_msg(-1024, "%s:", p->p.name);
cli_msg(-1024, "%-25s %-10s %6s %6s %10s",
"IP address", "Interface", "Metric", "Routes", "Next hello");
cli_msg(-1024, "%-25s %-10s %6s %6s %6s %7s",
"IP address", "Interface", "Metric", "Routes", "Hellos", "Expires");
WALK_LIST(ifa, p->interfaces)
{
@ -1856,9 +1865,10 @@ babel_show_neighbors(struct proto *P, char *iff)
WALK_LIST(r, n->routes)
rts++;
int timer = n->hello_expiry - now;
cli_msg(-1024, "%-25I %-10s %6u %6u %10u",
n->addr, ifa->iface->name, n->txcost, rts, MAX(timer, 0));
uint hellos = u32_popcount(n->hello_map);
btime timer = n->hello_expiry - current_time();
cli_msg(-1024, "%-25I %-10s %6u %6u %6u %7t",
n->addr, ifa->iface->name, n->txcost, rts, hellos, MAX(timer, 0));
}
}
@ -1888,8 +1898,8 @@ babel_show_entries_(struct babel_proto *p, struct fib *rtable)
else
bsprintf(ridbuf, "%lR", r->router_id);
int time = r->expires ? r->expires - now : 0;
cli_msg(-1025, "%-29N %-23s %6u %5u %7u %7u",
btime time = r->expires ? r->expires - current_time() : 0;
cli_msg(-1025, "%-29N %-23s %6u %5u %7t %7u",
e->n.addr, ridbuf, r->metric, r->seqno, MAX(time, 0), srcs);
}
else
@ -1948,8 +1958,8 @@ babel_timer(timer *t)
static inline void
babel_kick_timer(struct babel_proto *p)
{
if (p->timer->expires TO_S > (now + 1))
tm_start(p->timer, 1);
if (p->timer->expires > (current_time() + 100 MS))
tm2_start(p->timer, 100 MS);
}
@ -2032,9 +2042,9 @@ babel_rt_notify(struct proto *P, struct channel *c UNUSED, struct network *net,
if (r != e->selected_out)
{
e->selected_out = r;
e->updated = now;
babel_trigger_update(p);
e->updated = current_time();
e->selected_out = r;
}
}
else
@ -2051,10 +2061,10 @@ babel_rt_notify(struct proto *P, struct channel *c UNUSED, struct network *net,
* expiry time. This causes a retraction to be sent, and later the route
* to be flushed once the hold time has passed.
*/
e->selected_out->metric = BABEL_INFINITY;
e->selected_out->expires = now + BABEL_HOLD_TIME;
e->updated = now;
babel_trigger_update(p);
e->updated = current_time();
e->selected_out->metric = BABEL_INFINITY;
e->selected_out->expires = current_time() + BABEL_HOLD_TIME;
}
else
{
@ -2121,8 +2131,8 @@ babel_start(struct proto *P)
OFFSETOF(struct babel_entry, n), 0, babel_init_entry);
init_list(&p->interfaces);
p->timer = tm_new_set(P->pool, babel_timer, p, 0, 1);
tm_start(p->timer, 2);
p->timer = tm2_new_init(P->pool, babel_timer, p, 1 S, 0);
tm2_start(p->timer, 1 S);
p->update_seqno = 1;
p->router_id = proto_get_router_id(&cf->c);

63
proto/babel/babel.h
View file

@ -32,25 +32,26 @@
#define BABEL_INFINITY 0xFFFF
#define BABEL_HELLO_INTERVAL_WIRED 4 /* Default hello intervals in seconds */
#define BABEL_HELLO_INTERVAL_WIRELESS 4
#define BABEL_HELLO_INTERVAL_WIRED (4 S_) /* Default hello intervals in seconds */
#define BABEL_HELLO_INTERVAL_WIRELESS (4 S_)
#define BABEL_UPDATE_INTERVAL_FACTOR 4
#define BABEL_IHU_INTERVAL_FACTOR 3
#define BABEL_IHU_EXPIRY_FACTOR(X) ((X)*3/2) /* 1.5 */
#define BABEL_HELLO_EXPIRY_FACTOR(X) ((X)*3/2) /* 1.5 */
#define BABEL_ROUTE_EXPIRY_FACTOR(X) ((X)*7/2) /* 3.5 */
#define BABEL_ROUTE_REFRESH_INTERVAL 2 /* Seconds before route expiry to send route request */
#define BABEL_HOLD_TIME 10 /* Expiry time for our own routes */
#define BABEL_IHU_EXPIRY_FACTOR(X) ((btime)(X)*3/2) /* 1.5 */
#define BABEL_HELLO_EXPIRY_FACTOR(X) ((btime)(X)*3/2) /* 1.5 */
#define BABEL_ROUTE_EXPIRY_FACTOR(X) ((btime)(X)*7/2) /* 3.5 */
#define BABEL_ROUTE_REFRESH_INTERVAL (2 S_) /* Time before route expiry to send route request */
#define BABEL_HOLD_TIME (10 S_) /* Expiry time for our own routes */
#define BABEL_SEQNO_REQUEST_EXPIRY (60 S_)
#define BABEL_GARBAGE_INTERVAL (300 S_)
#define BABEL_RXCOST_WIRED 96
#define BABEL_RXCOST_WIRELESS 256
#define BABEL_INITIAL_HOP_COUNT 255
#define BABEL_MAX_SEND_INTERVAL 5
#define BABEL_TIME_UNITS 100 /* On-wire times are counted in centiseconds */
#define BABEL_SEQNO_REQUEST_EXPIRY 60
#define BABEL_GARBAGE_INTERVAL 300
#define BABEL_MAX_SEND_INTERVAL 5 /* Unused ? */
/* Max interval that will not overflow when carried as 16-bit centiseconds */
#define BABEL_MAX_INTERVAL (0xFFFF/BABEL_TIME_UNITS)
#define BABEL_TIME_UNITS 10000 /* On-wire times are counted in centiseconds */
#define BABEL_MIN_INTERVAL (0x0001 * BABEL_TIME_UNITS)
#define BABEL_MAX_INTERVAL (0xFFFF * BABEL_TIME_UNITS)
#define BABEL_OVERHEAD (IP6_HEADER_LENGTH+UDP_HEADER_LENGTH)
#define BABEL_MIN_MTU (512 + BABEL_OVERHEAD)
@ -113,9 +114,9 @@ struct babel_iface_config {
u8 type;
u8 check_link;
uint port;
u16 hello_interval;
u16 ihu_interval;
u16 update_interval;
uint hello_interval; /* Hello interval, in us */
uint ihu_interval; /* IHU interval, in us */
uint update_interval; /* Update interval, in us */
u16 rx_buffer; /* RX buffer size, 0 for MTU */
u16 tx_length; /* TX packet length limit (including headers), 0 for MTU */
@ -172,10 +173,10 @@ struct babel_iface {
u16 hello_seqno; /* To be increased on each hello */
bird_clock_t next_hello;
bird_clock_t next_regular;
bird_clock_t next_triggered;
bird_clock_t want_triggered;
btime next_hello;
btime next_regular;
btime next_triggered;
btime want_triggered;
timer *timer;
event *send_event;
@ -191,8 +192,8 @@ struct babel_neighbor {
u16 hello_map;
u16 next_hello_seqno;
/* expiry timers */
bird_clock_t hello_expiry;
bird_clock_t ihu_expiry;
btime hello_expiry;
btime ihu_expiry;
list routes; /* Routes this neighbour has sent us (struct babel_route) */
};
@ -203,7 +204,7 @@ struct babel_source {
u64 router_id;
u16 seqno;
u16 metric;
bird_clock_t expires;
btime expires;
};
struct babel_route {
@ -217,9 +218,9 @@ struct babel_route {
u16 metric;
u64 router_id;
ip_addr next_hop;
bird_clock_t refresh_time;
bird_clock_t expires;
u16 expiry_interval;
btime refresh_time;
btime expires;
btime expiry_interval;
};
struct babel_entry {
@ -227,7 +228,7 @@ struct babel_entry {
struct babel_route *selected_in;
struct babel_route *selected_out;
bird_clock_t updated;
btime updated;
list sources; /* Source entries for this prefix (struct babel_source). */
list routes; /* Routes for this prefix (struct babel_route) */
@ -241,7 +242,7 @@ struct babel_seqno_request {
net_addr net;
u64 router_id;
u16 seqno;
bird_clock_t updated;
btime updated;
};
@ -252,7 +253,7 @@ struct babel_seqno_request {
struct babel_msg_ack_req {
u8 type;
u16 nonce;
u16 interval;
uint interval;
ip_addr sender;
};
@ -264,7 +265,7 @@ struct babel_msg_ack {
struct babel_msg_hello {
u8 type;
u16 seqno;
u16 interval;
uint interval;
ip_addr sender;
};
@ -272,7 +273,7 @@ struct babel_msg_ihu {
u8 type;
u8 ae;
u16 rxcost;
u16 interval;
uint interval;
ip_addr addr;
ip_addr sender;
};
@ -280,7 +281,7 @@ struct babel_msg_ihu {
struct babel_msg_update {
u8 type;
u8 wildcard;
u16 interval;
uint interval;
u16 seqno;
u16 metric;
u64 router_id;

4
proto/babel/config.Y
View file

@ -89,10 +89,10 @@ babel_iface_finish:
babel_iface_item:
| PORT expr { BABEL_IFACE->port = $2; if (($2<1) || ($2>65535)) cf_error("Invalid port number"); }
| RXCOST expr { BABEL_IFACE->rxcost = $2; if (($2<1) || ($2>65535)) cf_error("Invalid rxcost"); }
| HELLO INTERVAL expr { BABEL_IFACE->hello_interval = $3; if (($3<1) || ($3>BABEL_MAX_INTERVAL)) cf_error("Invalid hello interval"); }
| UPDATE INTERVAL expr { BABEL_IFACE->update_interval = $3; if (($3<1) || ($3>BABEL_MAX_INTERVAL)) cf_error("Invalid update interval"); }
| TYPE WIRED { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRED; }
| TYPE WIRELESS { BABEL_IFACE->type = BABEL_IFACE_TYPE_WIRELESS; }
| HELLO INTERVAL expr_us { BABEL_IFACE->hello_interval = $3; if (($3<BABEL_MIN_INTERVAL) || ($3>BABEL_MAX_INTERVAL)) cf_error("Hello interval must be in range 10 ms - 655 s"); }
| UPDATE INTERVAL expr_us { BABEL_IFACE->update_interval = $3; if (($3<BABEL_MIN_INTERVAL) || ($3>BABEL_MAX_INTERVAL)) cf_error("Update interval must be in range 10 ms - 655 s"); }
| RX BUFFER expr { BABEL_IFACE->rx_buffer = $3; if (($3<256) || ($3>65535)) cf_error("RX buffer must be in range 256-65535"); }
| TX LENGTH expr { BABEL_IFACE->tx_length = $3; if (($3<256) || ($3>65535)) cf_error("TX length must be in range 256-65535"); }
| TX tos { BABEL_IFACE->tx_tos = $2; }

10
proto/babel/packets.c
View file

@ -162,17 +162,17 @@ bytes_equal(u8 *b1, u8 *b2, uint maxlen)
return i;
}
static inline u16
static inline uint
get_time16(const void *p)
{
u16 v = get_u16(p) / BABEL_TIME_UNITS;
return MAX(1, v);
uint v = get_u16(p) * BABEL_TIME_UNITS;
return MAX(BABEL_MIN_INTERVAL, v);
}
static inline void
put_time16(void *p, u16 v)
put_time16(void *p, uint v)
{
put_u16(p, v * BABEL_TIME_UNITS);
put_u16(p, v / BABEL_TIME_UNITS);
}
static inline void