summaryrefslogtreecommitdiff
path: root/proto/bfd
diff options
context:
space:
mode:
Diffstat (limited to 'proto/bfd')
-rw-r--r--proto/bfd/Makefile2
-rw-r--r--proto/bfd/bfd.c535
-rw-r--r--proto/bfd/bfd.h67
-rw-r--r--proto/bfd/config.Y9
-rw-r--r--proto/bfd/io.c253
-rw-r--r--proto/bfd/io.h70
-rw-r--r--proto/bfd/packets.c117
7 files changed, 754 insertions, 299 deletions
diff --git a/proto/bfd/Makefile b/proto/bfd/Makefile
index 77b8bd2c..c28cedec 100644
--- a/proto/bfd/Makefile
+++ b/proto/bfd/Makefile
@@ -1,4 +1,4 @@
-source=bfd.c
+source=bfd.c packets.c io.c
root-rel=../../
dir-name=proto/bfd
diff --git a/proto/bfd/bfd.c b/proto/bfd/bfd.c
index 4c7fe1f1..6e38102b 100644
--- a/proto/bfd/bfd.c
+++ b/proto/bfd/bfd.c
@@ -1,150 +1,92 @@
-#include "nest/bird.h"
-#include "nest/iface.h"
-#include "nest/protocol.h"
-#include "nest/route.h"
-#include "nest/cli.h"
-#include "conf/conf.h"
-#include "lib/socket.h"
-#include "lib/resource.h"
-#include "lib/string.h"
+/*
+ * BIRD -- Bidirectional Forwarding Detection (BFD)
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
#include "bfd.h"
-#define HASH_ID_KEY loc_id
-#define HASH_ID_NEXT next_id
-#define HASH_ID_EQ(a,b) ((a)==(b))
-#define HASH_ID_FN(a) (a)
+#define HASH_ID_KEY(n) n->loc_id
+#define HASH_ID_NEXT(n) n->next_id
+#define HASH_ID_EQ(a,b) (a == b)
+#define HASH_ID_FN(k) (k)
-#define HASH_IP_KEY addr
-#define HASH_IP_NEXT next_ip
-#define HASH_IP_EQ(a,b) ((a)==(b))
-#define HASH_IP_FN(a) (a == b)
+#define HASH_IP_KEY(n) n->addr
+#define HASH_IP_NEXT(n) n->next_ip
+#define HASH_IP_EQ(a,b) ipa_equal(a,b)
+#define HASH_IP_FN(k) ipa_hash(k)
-static u32
-bfd_get_free_id(struct bfd_proto *p)
-{
- u32 id;
- for (id = random_u32(); 1; id++)
- if (id && !bfd_find_session_by_id(p, id))
- break;
-
- return id;
-}
+static inline void bfd_notify_kick(struct bfd_proto *p);
-static void
-bfd_add_session(struct bfd_proto *p, ip_addr addr, struct bfd_session_config *opts)
+static void
+bfd_session_update_state(struct bfd_session *s, uint state, uint diag)
{
- birdloop_enter(p->loop);
-
- struct bfd_session *s = sl_alloc(p->session_slab);
- bzero(s, sizeof(struct bfd_session));
+ struct bfd_proto *p = s->bfd;
+ int notify;
- /* Initialization of state variables - see RFC 5880 3.8.1 */
- s->loc_state = BFD_STATE_DOWN;
- s->rem_state = BFD_STATE_DOWN;
- s->loc_id = bfd_get_free_id(p);
- s->des_min_tx_int = s->des_min_tx_new = s->opts->idle_tx_int;
- s->req_min_rx_int = s->req_min_rx_new = s->opts->min_rx_int;
- s->detect_mult = s->opts->multiplier;
- s->rem_min_rx_int = 1;
-
- HASH_INSERT(p->session_hash_id, HASH_ID, s);
- HASH_INSERT(p->session_hash_ip, HASH_IP, s);
-
- s->tx_timer = tm2_new_set(xxx, bfd_rx_timer_hook, s, 0, 0);
- s->hold_timer = tm2_new_set(xxx, bfd_hold_timer_hook, s, 0, 0);
- bfd_session_update_tx_interval(s);
-
- birdloop_leave(p->loop);
-}
-
-static void
-bfd_open_session(struct bfd_proto *p, struct bfd_session *s, ip_addr local, struct iface *ifa)
-{
- birdloop_enter(p->loop);
+ if (s->loc_state == state)
+ return;
- s->bsock = bfd_get_socket(p, local, ifa);
- s->local = local;
- s->iface = ifa;
- s->opened = 1;
+ //TRACE(D_EVENTS, "Session changed %I %d %d", s->addr, state, diag);
+ debug("STATE %I %d %d %d\n", s->addr, s->loc_state, state, diag);
+
+ bfd_lock_sessions(p);
+ s->loc_state = state;
+ s->loc_diag = diag;
- bfd_session_control_tx_timer(s);
+ notify = !NODE_VALID(&s->n);
+ if (notify)
+ add_tail(&p->notify_list, &s->n);
+ bfd_unlock_sessions(p);
- birdloop_leave(p->loop);
+ if (notify)
+ bfd_notify_kick(p);
}
-static void
-bfd_close_session(struct bfd_proto *p, struct bfd_session *s)
+static void
+bfd_session_timeout(struct bfd_session *s)
{
- birdloop_enter(p->loop);
-
- bfd_free_socket(s->bsock);
- s->bsock = NULL;
- s->local = IPA_NONE;
- s->iface = NULL;
- s->opened = 0;
-
- bfd_session_control_tx_timer(s);
+ s->rem_state = BFD_STATE_DOWN;
+ s->rem_id = 0;
+ s->rem_min_tx_int = 0;
+ s->rem_min_rx_int = 1;
+ s->rem_demand_mode = 0;
+ s->rem_detect_mult = 0;
- birdloop_leave(p->loop);
+ bfd_session_update_state(s, BFD_STATE_DOWN, BFD_DIAG_TIMEOUT);
}
static void
-bfd_remove_session(struct bfd_proto *p, struct bfd_session *s)
+bfd_session_update_tx_interval(struct bfd_session *s)
{
- birdloop_enter(p->loop);
-
- bfd_free_socket(s->bsock);
-
- rfree(s->tx_timer);
- rfree(s->hold_timer);
-
- HASH_REMOVE(p->session_hash_id, HASH_ID, s);
- HASH_REMOVE(p->session_hash_ip, HASH_IP, s);
-
- sl_free(p->session_slab, s);
+ u32 tx_int = MAX(s->des_min_tx_int, s->rem_min_rx_int);
+ u32 tx_int_l = tx_int - (tx_int / 4); // 75 %
+ u32 tx_int_h = tx_int - (tx_int / 10); // 90 %
- birdloop_leave(p->loop);
-}
+ s->tx_timer->recurrent = tx_int_l;
+ s->tx_timer->randomize = tx_int_h - tx_int_l;
-struct bfd_session *
-bfd_find_session_by_id(struct bfd_proto *p, u32 id)
-{
- return HASH_FIND(p->session_hash_id, HASH_ID, id);
-}
+ /* Do not set timer if no previous event */
+ if (!s->last_tx)
+ return;
-struct bfd_session *
-bfd_find_session_by_addr(struct bfd_proto *p, ip_addr addr)
-{
- return HASH_FIND(p->session_hash_ip, HASH_IP, addr);
+ /* Set timer relative to last tx_timer event */
+ tm2_set(s->tx_timer, s->last_tx + tx_int_l);
}
static void
-bfd_rx_timer_hook(timer2 *t)
+bfd_session_update_detection_time(struct bfd_session *s, int kick)
{
- struct bfd_session *s = timer->data;
+ btime timeout = (btime) MAX(s->req_min_rx_int, s->rem_min_tx_int) * s->rem_detect_mult;
- s->last_tx = xxx_now;
- bfd_send_ctl(s->bfd, s, 0);
-}
-
-static void
-bfd_hold_timer_hook(timer2 *t)
-{
- bfd_session_timeout(timer->data);
-}
+ if (kick)
+ s->last_rx = current_time();
-static void
-bfd_session_timeout(struct bfd_session *s)
-{
- s->rem_state = BFD_STATE_DOWN;
- s->rem_id = 0;
- s->rem_min_tx_int = 0;
- s->rem_min_rx_int = 1;
- s->rem_demand_mode = 0;
+ if (!s->last_rx)
+ return;
- bfd_session_update_state(s, BFD_STATE_DOWN, BFD_DIAG_TIMEOUT);
+ tm2_set(s->hold_timer, s->last_rx + timeout);
}
static void
@@ -178,38 +120,6 @@ bfd_session_control_tx_timer(struct bfd_session *s)
}
static void
-bfd_session_update_tx_interval(struct bfd_session *s)
-{
- u32 tx_int = MAX(s->des_min_tx_int, s->rem_min_rx_int);
- u32 tx_int_l = tx_int - (tx_int / 4); // 75 %
- u32 tx_int_h = tx_int - (tx_int / 10); // 90 %
-
- s->tx_timer->recurrent = tx_int_l;
- s->tx_timer->randomize = tx_int_h - tx_int_l;
-
- /* Do not set timer if no previous event */
- if (!s->last_tx)
- return;
-
- /* Set timer relative to last tx_timer event */
- tm2_set(s->tx_timer, s->last_tx + tx_int_l);
-}
-
-static void
-bfd_session_update_detection_time(struct bfd_session *s, int kick)
-{
- xxx_time timeout = (xxx_time) MAX(s->req_min_rx_int, s->rem_min_tx_int) * s->rem_detect_mult;
-
- if (kick)
- s->last_rx = xxx_now;
-
- if (!s->last_rx)
- return;
-
- tm2_set(s->hold_timer, s->last_rx + timeout);
-}
-
-void
bfd_session_request_poll(struct bfd_session *s, u8 request)
{
s->poll_scheduled |= request;
@@ -222,7 +132,7 @@ bfd_session_request_poll(struct bfd_session *s, u8 request)
bfd_send_ctl(s->bfd, s, 0);
}
-void
+static void
bfd_session_terminate_poll(struct bfd_session *s)
{
u8 poll_done = s->poll_active & ~s->poll_scheduled;
@@ -237,16 +147,16 @@ bfd_session_terminate_poll(struct bfd_session *s)
/* Timers are updated by caller - bfd_session_process_ctl() */
- xxx_restart_poll();
+ // xxx_restart_poll();
}
void
-bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_rx_int, u32 old_tx_int)
+bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_tx_int, u32 old_rx_int)
{
if (s->poll_active && (flags & BFD_FLAG_FINAL))
bfd_session_terminate_poll(s);
- if ((s->des_min_tx_int != old_rx_int) || (s->rem_min_rx_int != old_tx_int))
+ if ((s->des_min_tx_int != old_tx_int) || (s->rem_min_rx_int != old_rx_int))
bfd_session_update_tx_interval(s);
bfd_session_update_detection_time(s, 1);
@@ -281,10 +191,9 @@ bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_rx_int, u32 old
bfd_session_control_tx_timer(s);
if (flags & BFD_FLAG_POLL)
- bfd_send_ctl(p, s, 1);
+ bfd_send_ctl(s->bfd, s, 1);
}
-
static void
bfd_session_set_min_tx(struct bfd_session *s, u32 val)
{
@@ -325,6 +234,151 @@ bfd_session_set_min_rx(struct bfd_session *s, u32 val)
bfd_session_request_poll(s, BFD_POLL_RX);
}
+struct bfd_session *
+bfd_find_session_by_id(struct bfd_proto *p, u32 id)
+{
+ return HASH_FIND(p->session_hash_id, HASH_ID, id);
+}
+
+struct bfd_session *
+bfd_find_session_by_addr(struct bfd_proto *p, ip_addr addr)
+{
+ return HASH_FIND(p->session_hash_ip, HASH_IP, addr);
+}
+
+static void
+bfd_tx_timer_hook(timer2 *t)
+{
+ struct bfd_session *s = t->data;
+
+ s->last_tx = current_time();
+ // debug("TX %d\n", (s32) (s->last_tx TO_MS));
+ bfd_send_ctl(s->bfd, s, 0);
+}
+
+static void
+bfd_hold_timer_hook(timer2 *t)
+{
+ bfd_session_timeout(t->data);
+}
+
+static u32
+bfd_get_free_id(struct bfd_proto *p)
+{
+ u32 id;
+ for (id = random_u32(); 1; id++)
+ if (id && !bfd_find_session_by_id(p, id))
+ break;
+
+ return id;
+}
+
+static struct bfd_session *
+bfd_add_session(struct bfd_proto *p, ip_addr addr, struct bfd_session_config *opts)
+{
+ birdloop_enter(p->loop);
+
+ struct bfd_session *s = sl_alloc(p->session_slab);
+ bzero(s, sizeof(struct bfd_session));
+
+ s->addr = addr;
+ s->loc_id = bfd_get_free_id(p);
+ debug("XXX INS1 %d %d %u %I\n", p->session_hash_id.count, p->session_hash_ip.count, s->loc_id, s->addr);
+ HASH_INSERT(p->session_hash_id, HASH_ID, s);
+ debug("XXX INS2 %d %d\n", p->session_hash_id.count, p->session_hash_ip.count);
+ HASH_INSERT(p->session_hash_ip, HASH_IP, s);
+ debug("XXX INS3 %d %d\n", p->session_hash_id.count, p->session_hash_ip.count);
+ s->bfd = p;
+
+ /* Initialization of state variables - see RFC 5880 6.8.1 */
+ s->loc_state = BFD_STATE_DOWN;
+ s->rem_state = BFD_STATE_DOWN;
+ s->des_min_tx_int = s->des_min_tx_new = opts->min_tx_int; // XXX opts->idle_tx_int;
+ s->req_min_rx_int = s->req_min_rx_new = opts->min_rx_int;
+ s->rem_min_rx_int = 1;
+ s->detect_mult = opts->multiplier;
+ s->passive = opts->passive;
+
+ s->tx_timer = tm2_new_init(p->tpool, bfd_tx_timer_hook, s, 0, 0);
+ s->hold_timer = tm2_new_init(p->tpool, bfd_hold_timer_hook, s, 0, 0);
+ bfd_session_update_tx_interval(s);
+
+ birdloop_leave(p->loop);
+
+ return s;
+}
+
+static void
+bfd_open_session(struct bfd_proto *p, struct bfd_session *s, ip_addr local, struct iface *ifa)
+{
+ birdloop_enter(p->loop);
+
+ s->bsock = bfd_get_socket(p, local, ifa);
+ // s->local = local;
+ // s->iface = ifa;
+ s->opened = 1;
+
+ bfd_session_control_tx_timer(s);
+
+ birdloop_leave(p->loop);
+}
+
+static void
+bfd_close_session(struct bfd_proto *p, struct bfd_session *s)
+{
+ birdloop_enter(p->loop);
+
+ bfd_free_socket(s->bsock);
+ s->bsock = NULL;
+ // s->local = IPA_NONE;
+ // s->iface = NULL;
+ s->opened = 0;
+
+ bfd_session_update_state(s, BFD_STATE_DOWN, BFD_DIAG_PATH_DOWN);
+ bfd_session_control_tx_timer(s);
+
+ birdloop_leave(p->loop);
+}
+
+static void
+bfd_remove_session(struct bfd_proto *p, struct bfd_session *s)
+{
+ birdloop_enter(p->loop);
+
+ bfd_free_socket(s->bsock);
+
+ rfree(s->tx_timer);
+ rfree(s->hold_timer);
+
+ debug("XXX REM1 %d %d %u %I\n", p->session_hash_id.count, p->session_hash_ip.count, s->loc_id, s->addr);
+ HASH_REMOVE(p->session_hash_id, HASH_ID, s);
+ debug("XXX REM2 %d %d\n", p->session_hash_id.count, p->session_hash_ip.count);
+ HASH_REMOVE(p->session_hash_ip, HASH_IP, s);
+ debug("XXX REM3 %d %d\n", p->session_hash_id.count, p->session_hash_ip.count);
+
+ sl_free(p->session_slab, s);
+
+ birdloop_leave(p->loop);
+}
+
+static void
+bfd_configure_session(struct bfd_proto *p, struct bfd_session *s,
+ struct bfd_session_config *opts)
+{
+ birdloop_enter(p->loop);
+
+ // XXX opts->idle_tx_int;
+
+ bfd_session_set_min_tx(s, opts->min_tx_int);
+ bfd_session_set_min_rx(s, opts->min_rx_int);
+ s->detect_mult = opts->multiplier;
+ s->passive = opts->passive;
+
+ bfd_session_control_tx_timer(s);
+
+ birdloop_leave(p->loop);
+}
+
static void
bfd_start_neighbor(struct bfd_proto *p, struct bfd_neighbor *n)
{
@@ -354,7 +408,7 @@ bfd_start_neighbor(struct bfd_proto *p, struct bfd_neighbor *n)
if (nb->scope > 0)
bfd_open_session(p, n->session, nb->iface->addr->ip, nb->iface);
else
- TRACE(D_EVENTS, "Waiting for %I%J to become my neighbor", n->addr, cf->iface);
+ TRACE(D_EVENTS, "Waiting for %I%J to become my neighbor", n->addr, n->iface);
}
static void
@@ -370,7 +424,6 @@ bfd_stop_neighbor(struct bfd_proto *p, struct bfd_neighbor *n)
bfd_remove_session(p, n->session);
}
-
static void
bfd_neigh_notify(struct neighbor *nb)
{
@@ -388,14 +441,91 @@ bfd_neigh_notify(struct neighbor *nb)
}
+/* This core notify code should be replaced after main loop transition to birdloop */
+
+int pipe(int pipefd[2]);
+void pipe_drain(int fd);
+void pipe_kick(int fd);
+
+static int
+bfd_notify_hook(sock *sk, int len)
+{
+ struct bfd_proto *p = sk->data;
+ struct bfd_session *s;
+ list tmp_list;
+
+ pipe_drain(sk->fd);
+
+ bfd_lock_sessions(p);
+ init_list(&tmp_list);
+ add_tail_list(&tmp_list, &p->notify_list);
+ init_list(&p->notify_list);
+ bfd_unlock_sessions(p);
+
+ WALK_LIST_FIRST(s, tmp_list)
+ {
+ bfd_lock_sessions(p);
+ rem2_node(&s->n);
+ bfd_unlock_sessions(p);
+
+ // XXX do something
+ TRACE(D_EVENTS, "Notify: session changed %I %d %d", s->addr, s->loc_state, s->loc_diag);
+ }
+
+ return 0;
+}
+
+static inline void
+bfd_notify_kick(struct bfd_proto *p)
+{
+ pipe_kick(p->notify_ws->fd);
+}
+
+static void
+bfd_noterr_hook(sock *sk, int err)
+{
+ struct bfd_proto *p = sk->data;
+ log(L_ERR "%s: Notify socket error: %m", p->p.name, err);
+}
+
+static void
+bfd_notify_init(struct bfd_proto *p)
+{
+ int pfds[2];
+ sock *sk;
+
+ int rv = pipe(pfds);
+ if (rv < 0)
+ die("pipe: %m");
+
+ sk = sk_new(p->p.pool);
+ sk->type = SK_MAGIC;
+ sk->rx_hook = bfd_notify_hook;
+ sk->err_hook = bfd_noterr_hook;
+ sk->fd = pfds[0];
+ sk->data = p;
+ if (sk_open(sk) < 0)
+ die("bfd: sk_open failed");
+ p->notify_rs = sk;
+
+ /* The write sock is not added to any event loop */
+ sk = sk_new(p->p.pool);
+ sk->type = SK_MAGIC;
+ sk->fd = pfds[1];
+ sk->data = p;
+ sk->flags = SKF_THREAD;
+ if (sk_open(sk) < 0)
+ die("bfd: sk_open failed");
+ p->notify_ws = sk;
+}
+
static struct proto *
bfd_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct bfd_proto));
- p->if_notify = bfd_if_notify;
- p->ifa_notify = bfd_ifa_notify;
+ p->neigh_notify = bfd_neigh_notify;
return p;
}
@@ -406,16 +536,33 @@ bfd_start(struct proto *P)
struct bfd_proto *p = (struct bfd_proto *) P;
struct bfd_config *cf = (struct bfd_config *) (P->cf);
+ p->loop = birdloop_new(P->pool);
+ p->tpool = rp_new(NULL, "BFD thread root");
+ pthread_spin_init(&p->lock, PTHREAD_PROCESS_PRIVATE);
+
p->session_slab = sl_new(P->pool, sizeof(struct bfd_session));
- init_list(&p->sockets);
+ HASH_INIT(p->session_hash_id, P->pool, 4);
+ HASH_INIT(p->session_hash_ip, P->pool, 4);
+
+ init_list(&p->sock_list);
+
+
+ birdloop_mask_wakeups(p->loop);
- HASH_INIT(p->session_hash_id, P->pool, 16);
- HASH_INIT(p->session_hash_ip, P->pool, 16);
+ init_list(&p->notify_list);
+ bfd_notify_init(p);
+
+ birdloop_enter(p->loop);
+ p->rx_1 = bfd_open_rx_sk(p, 0);
+ p->rx_m = bfd_open_rx_sk(p, 1);
+ birdloop_leave(p->loop);
struct bfd_neighbor *n;
- WALK_LIST(n, cf->neighbors)
+ WALK_LIST(n, cf->neigh_list)
bfd_start_neighbor(p, n);
+ birdloop_unmask_wakeups(p->loop);
+
return PS_UP;
}
@@ -440,14 +587,11 @@ bfd_match_neighbor(struct bfd_proto *p, struct bfd_neighbor *on, struct bfd_conf
{
struct bfd_neighbor *nn;
- if (r->neigh)
- r->neigh->data = NULL;
-
- WALK_LIST(nn, new->neighbors)
+ WALK_LIST(nn, new->neigh_list)
if (bfd_same_neighbor(nn, on))
{
nn->session = on->session;
- // XXX reconfiguration of session?
+ bfd_configure_session(p, nn->session, nn->opts);
return;
}
@@ -462,13 +606,17 @@ bfd_reconfigure(struct proto *P, struct proto_config *c)
struct bfd_config *new = (struct bfd_config *) c;
struct bfd_neighbor *n;
- WALK_LIST(n, old->neighbors)
+ birdloop_mask_wakeups(p->loop);
+
+ WALK_LIST(n, old->neigh_list)
bfd_match_neighbor(p, n, new);
- WALK_LIST(n, new->neighbors)
+ WALK_LIST(n, new->neigh_list)
if (!n->session)
bfd_start_neighbor(p, n);
+ birdloop_unmask_wakeups(p->loop);
+
return 1;
}
@@ -476,15 +624,52 @@ static void
bfd_copy_config(struct proto_config *dest, struct proto_config *src)
{
struct bfd_config *d = (struct bfd_config *) dest;
- struct bfd_config *s = (struct bfd_config *) src;
+ // struct bfd_config *s = (struct bfd_config *) src;
- /* We clean up patt_list, ifaces are non-sharable */
- init_list(&d->patt_list);
+ /* We clean up neigh_list, ifaces are non-sharable */
+ init_list(&d->neigh_list);
- /* We copy pref_list, shallow copy suffices */
- cfg_copy_list(&d->pref_list, &s->pref_list, sizeof(struct bfd_prefix_config));
}
+void
+bfd_show_sessions(struct proto *P)
+{
+ struct bfd_proto *p = (struct bfd_proto *) P;
+ uint state, diag;
+ u32 tx_int, timeout;
+ const char *ifname;
+
+ if (p->p.proto_state != PS_UP)
+ {
+ cli_msg(-1013, "%s: is not up", p->p.name);
+ cli_msg(0, "");
+ return;
+ }
+
+ cli_msg(-1013, "%s:", p->p.name);
+ cli_msg(-1013, "%-12s\t%s\t%s\t%s\t%s", "Router IP", "Iface",
+ "State", "TX Int", "Timeout");
+
+ debug("XXX WALK %d %d\n", p->session_hash_id.count, p->session_hash_ip.count);
+
+ HASH_WALK(p->session_hash_id, next_id, s)
+ {
+ // FIXME this is unsafe
+ state = s->loc_state;
+ diag = s->loc_diag;
+ ifname = (s->bsock && s->bsock->sk->iface) ? s->bsock->sk->iface->name : "---";
+ tx_int = (MAX(s->des_min_tx_int, s->rem_min_rx_int) TO_MS);
+ timeout = (MAX(s->req_min_rx_int, s->rem_min_tx_int) TO_MS) * s->rem_detect_mult;
+
+ cli_msg(-1013, "%I\t%s\t%d %d\t%u\t%u",
+ s->addr, ifname, state, diag, tx_int, timeout);
+ }
+ HASH_WALK_END;
+
+ cli_msg(0, "");
+}
+
+
struct protocol proto_bfd = {
.name = "BFD",
.template = "bfd%d",
diff --git a/proto/bfd/bfd.h b/proto/bfd/bfd.h
index a54053d3..97ccb507 100644
--- a/proto/bfd/bfd.h
+++ b/proto/bfd/bfd.h
@@ -1,7 +1,28 @@
+/*
+ * BIRD -- Bidirectional Forwarding Detection (BFD)
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
#ifndef _BIRD_BFD_H_
#define _BIRD_BFD_H_
+#include <pthread.h>
+
+#include "nest/bird.h"
+#include "nest/cli.h"
+#include "nest/iface.h"
+#include "nest/protocol.h"
+#include "nest/route.h"
+#include "conf/conf.h"
+#include "lib/hash.h"
+#include "lib/resource.h"
+#include "lib/socket.h"
+#include "lib/string.h"
+
+#include "io.h"
+
+
#define BFD_CONTROL_PORT 3784
#define BFD_ECHO_PORT 3785
#define BFD_MULTI_CTL_PORT 4784
@@ -15,7 +36,7 @@
struct bfd_config
{
struct proto_config c;
- list neighbors; /* List of struct bfd_neighbor */
+ list neigh_list; /* List of struct bfd_neighbor */
};
struct bfd_session_config
@@ -42,12 +63,21 @@ struct bfd_neighbor
struct bfd_proto
{
struct proto p;
+ struct birdloop *loop;
+ pool *tpool;
+ pthread_spinlock_t lock;
slab *session_slab;
HASH(struct bfd_session) session_hash_id;
HASH(struct bfd_session) session_hash_ip;
- list sockets;
+ sock *notify_rs;
+ sock *notify_ws;
+ list notify_list;
+
+ sock *rx_1;
+ sock *rx_m;
+ list sock_list;
};
struct bfd_socket
@@ -60,16 +90,20 @@ struct bfd_socket
struct bfd_session
{
node n;
+ ip_addr addr; /* Address of session */
struct bfd_session *next_id; /* Next in bfd.session_hash_id */
struct bfd_session *next_ip; /* Next in bfd.session_hash_ip */
+ struct bfd_proto *bfd;
u8 opened;
+ u8 passive;
u8 poll_active;
u8 poll_scheduled;
u8 loc_state;
u8 rem_state;
u8 loc_diag;
+ u8 rem_diag;
u32 loc_id; /* Local session ID (local discriminator) */
u32 rem_id; /* Remote session ID (remote discriminator) */
u32 des_min_tx_int; /* Desired min rx interval, local option */
@@ -83,11 +117,13 @@ struct bfd_session
u8 detect_mult; /* Announced detect_mult, local option */
u8 rem_detect_mult; /* Last received detect_mult */
- xxx_time last_tx; /* Time of last sent periodic control packet */
- xxx_time last_rx; /* Time of last received valid control packet */
+ btime last_tx; /* Time of last sent periodic control packet */
+ btime last_rx; /* Time of last received valid control packet */
timer2 *tx_timer; /* Periodic control packet timer */
timer2 *hold_timer; /* Timer for session down detection time */
+
+ struct bfd_socket *bsock; /* Socket associated with session */
};
@@ -110,9 +146,30 @@ struct bfd_session
#define BFD_POLL_TX 1
#define BFD_POLL_RX 2
+#define BFD_FLAG_POLL (1 << 5)
+#define BFD_FLAG_FINAL (1 << 4)
+#define BFD_FLAG_CPI (1 << 3)
+#define BFD_FLAG_AP (1 << 2)
+#define BFD_FLAG_DEMAND (1 << 1)
+#define BFD_FLAG_MULTIPOINT (1 << 0)
+
+
+static inline void bfd_lock_sessions(struct bfd_proto *p) { pthread_spin_lock(&p->lock); }
+static inline void bfd_unlock_sessions(struct bfd_proto *p) { pthread_spin_unlock(&p->lock); }
+
+/* bfd.c */
+struct bfd_session * bfd_find_session_by_id(struct bfd_proto *p, u32 id);
+struct bfd_session * bfd_find_session_by_addr(struct bfd_proto *p, ip_addr addr);
+void bfd_session_process_ctl(struct bfd_session *s, u8 flags, u32 old_tx_int, u32 old_rx_int);
+void bfd_show_sessions(struct proto *P);
+/* packets.c */
+void bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final);
+sock * bfd_open_rx_sk(struct bfd_proto *p, int multihop);
+struct bfd_socket * bfd_get_socket(struct bfd_proto *p, ip_addr local, struct iface *ifa);
+void bfd_free_socket(struct bfd_socket *sk);
-#endif _BIRD_BFD_H_
+#endif /* _BIRD_BFD_H_ */
diff --git a/proto/bfd/config.Y b/proto/bfd/config.Y
index a5414d4e..f1193d70 100644
--- a/proto/bfd/config.Y
+++ b/proto/bfd/config.Y
@@ -22,7 +22,7 @@ static struct bfd_neighbor *this_bfd_neighbor;
CF_DECLS
CF_KEYWORDS(BFD, MIN, IDLE, RX, TX, INTERVAL, MULTIPLIER, MULTIHOP, PASSIVE,
- NEIGHBOR)
+ NEIGHBOR, DEV)
%type <iface> bfd_neigh_iface
%type <a> bfd_neigh_local
@@ -34,7 +34,7 @@ CF_ADDTO(proto, bfd_proto)
bfd_proto_start: proto_start BFD
{
this_proto = proto_config_new(&proto_bfd, sizeof(struct bfd_config), $1);
- init_list(&BFD_CFG->neighbors);
+ init_list(&BFD_CFG->neigh_list);
};
bfd_proto_item:
@@ -99,7 +99,7 @@ bfd_neigh_local:
bfd_neighbor: NEIGHBOR ipa bfd_neigh_iface bfd_neigh_local bfd_session
{
this_bfd_neighbor = cfg_allocz(sizeof(struct bfd_neighbor));
- add_tail(&BFD_CFG->neighbors, NODE this_bfd_neighbor);
+ add_tail(&BFD_CFG->neigh_list, NODE this_bfd_neighbor);
BFD_NEIGHBOR->addr = $2;
BFD_NEIGHBOR->local = $4;
@@ -108,6 +108,9 @@ bfd_neighbor: NEIGHBOR ipa bfd_neigh_iface bfd_neigh_local bfd_session
};
+CF_CLI(SHOW BFD SESSIONS, optsym, [<name>], [[Show information about BFD sessions]])
+{ bfd_show_sessions(proto_get_named($4, &proto_bfd)); };
+
CF_CODE
CF_END
diff --git a/proto/bfd/io.c b/proto/bfd/io.c
index f7fbc67a..c5f2d1b0 100644
--- a/proto/bfd/io.c
+++ b/proto/bfd/io.c
@@ -1,18 +1,44 @@
+/*
+ * BIRD -- I/O and event loop
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <poll.h>
+#include <pthread.h>
+#include <time.h>
+#include <sys/time.h>
+
+#include "nest/bird.h"
+#include "proto/bfd/io.h"
#include "lib/buffer.h"
#include "lib/heap.h"
+#include "lib/lists.h"
+#include "lib/resource.h"
+#include "lib/event.h"
+#include "lib/socket.h"
+
struct birdloop
{
pool *pool;
+ pthread_t thread;
+ pthread_mutex_t mutex;
- int wakeup_fds[2];
- u8 poll_active;
-
- xxx_time last_time;
- xxx_time real_time;
+ btime last_time;
+ btime real_time;
u8 use_monotonic_clock;
+ u8 poll_active;
+ u8 wakeup_masked;
+ int wakeup_fds[2];
+
BUFFER(timer2 *) timers;
list event_list;
list sock_list;
@@ -22,13 +48,35 @@ struct birdloop
BUFFER(struct pollfd) poll_fd;
u8 poll_changed;
u8 close_scheduled;
-
};
+
+static pthread_key_t current_loop_key;
+
+static inline struct birdloop *
+birdloop_current(void)
+{
+ return pthread_getspecific(current_loop_key);
+}
+
+static inline void
+birdloop_set_current(struct birdloop *loop)
+{
+ pthread_setspecific(current_loop_key, loop);
+}
+
+static inline void
+birdloop_init_current(void)
+{
+ pthread_key_create(&current_loop_key, NULL);
+}
+
+
+
static void times_update_alt(struct birdloop *loop);
-static int
+static void
times_init(struct birdloop *loop)
{
struct timespec ts;
@@ -47,12 +95,12 @@ times_init(struct birdloop *loop)
}
/*
- if ((tv.tv_sec < 0) || (((s64) tv.tv_sec) > ((s64) 1 << 40)))
+ if ((ts.tv_sec < 0) || (((s64) ts.tv_sec) > ((s64) 1 << 40)))
log(L_WARN "Monotonic clock is crazy");
*/
loop->use_monotonic_clock = 1;
- loop->last_time = (tv.tv_sec S) + (tv.tv_nsec / 1000);
+ loop->last_time = (ts.tv_sec S) + (ts.tv_nsec / 1000);
loop->real_time = 0;
}
@@ -66,7 +114,7 @@ times_update_pri(struct birdloop *loop)
if (rv < 0)
die("clock_gettime: %m");
- xxx_time new_time = (tv.tv_sec S) + (tv.tv_nsec / 1000);
+ btime new_time = (ts.tv_sec S) + (ts.tv_nsec / 1000);
/*
if (new_time < loop->last_time)
@@ -87,8 +135,8 @@ times_update_alt(struct birdloop *loop)
if (rv < 0)
die("gettimeofday: %m");
- xxx_time new_time = (tv.tv_sec S) + tv.tv_usec;
- xxx_time delta = new_time - loop->real_time;
+ btime new_time = (tv.tv_sec S) + tv.tv_usec;
+ btime delta = new_time - loop->real_time;
if ((delta < 0) || (delta > (60 S)))
{
@@ -113,15 +161,18 @@ times_update(struct birdloop *loop)
times_update_alt(loop);
}
+btime
+current_time(void)
+{
+ return birdloop_current()->last_time;
+}
+
static void
pipe_new(int *pfds)
{
- int pfds[2], rv;
- sock *sk;
-
- rv = pipe(pfds);
+ int rv = pipe(pfds);
if (rv < 0)
die("pipe: %m");
@@ -132,20 +183,14 @@ pipe_new(int *pfds)
die("fcntl(O_NONBLOCK): %m");
}
-static void
-wakeup_init(struct birdloop *loop)
-{
- pipe_new(loop->wakeup_fds);
-}
-
-static void
-wakeup_drain(struct birdloop *loop)
+void
+pipe_drain(int fd)
{
char buf[64];
int rv;
try:
- rv = read(loop->wakeup_fds[0], buf, 64);
+ rv = read(fd, buf, 64);
if (rv < 0)
{
if (errno == EINTR)
@@ -158,14 +203,14 @@ wakeup_drain(struct birdloop *loop)
goto try;
}
-static void
-wakeup_kick(struct birdloop *loop)
+void
+pipe_kick(int fd)
{
u64 v = 1;
int rv;
try:
- rv = write(loop->wakeup_fds[1], &v, sizeof(u64));
+ rv = write(fd, &v, sizeof(u64));
if (rv < 0)
{
if (errno == EINTR)
@@ -176,16 +221,45 @@ wakeup_kick(struct birdloop *loop)
}
}
+static inline void
+wakeup_init(struct birdloop *loop)
+{
+ pipe_new(loop->wakeup_fds);
+}
+static inline void
+wakeup_drain(struct birdloop *loop)
+{
+ pipe_drain(loop->wakeup_fds[0]);
+}
+static inline void
+wakeup_do_kick(struct birdloop *loop)
+{
+ pipe_kick(loop->wakeup_fds[1]);
+}
-static inline uint events_waiting(struct birdloop *loop)
-{ return !EMPTY_LIST(loop->event_list); }
+static inline void
+wakeup_kick(struct birdloop *loop)
+{
+ if (!loop->wakeup_masked)
+ wakeup_do_kick(loop);
+ else
+ loop->wakeup_masked = 2;
+}
-static void
+
+
+static inline uint
+events_waiting(struct birdloop *loop)
+{
+ return !EMPTY_LIST(loop->event_list);
+}
+
+static inline void
events_init(struct birdloop *loop)
{
- list_init(&poll->event_list);
+ init_list(&loop->event_list);
}
static void
@@ -198,6 +272,8 @@ events_fire(struct birdloop *loop)
void
ev2_schedule(event *e)
{
+ struct birdloop *loop = birdloop_current();
+
if (loop->poll_active && EMPTY_LIST(loop->event_list))
wakeup_kick(loop);
@@ -208,6 +284,7 @@ ev2_schedule(event *e)
}
+
#define TIMER_LESS(a,b) ((a)->expires < (b)->expires)
#define TIMER_SWAP(heap,a,b,t) (t = heap[a], heap[a] = heap[b], heap[b] = t, \
heap[a]->index = (a), heap[b]->index = (b))
@@ -239,14 +316,15 @@ tm2_dump(resource *r)
if (t->recurrent)
debug("recur %d, ", t->recurrent);
if (t->expires)
- debug("expires in %d sec)\n", t->expires - xxx_now);
+ debug("expires in %d ms)\n", (t->expires - current_time()) TO_MS);
else
debug("inactive)\n");
}
+
static struct resclass tm2_class = {
"Timer",
- sizeof(timer),
+ sizeof(timer2),
tm2_free,
tm2_dump,
NULL,
@@ -262,9 +340,9 @@ tm2_new(pool *p)
}
void
-tm2_start(timer2 *t, xxx_time after)
+tm2_set(timer2 *t, btime when)
{
- xxx_time when = loop->last_time + after;
+ struct birdloop *loop = birdloop_current();
uint tc = timers_count(loop);
if (!t->expires)
@@ -290,12 +368,20 @@ tm2_start(timer2 *t, xxx_time after)
}
void
+tm2_start(timer2 *t, btime after)
+{
+ tm2_set(t, current_time() + MAX(after, 0));
+}
+
+void
tm2_stop(timer2 *t)
{
if (!t->expires)
return;
- uint tc = timers_count(XXX);
+ struct birdloop *loop = birdloop_current();
+ uint tc = timers_count(loop);
+
HEAP_DELETE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
BUFFER_POP(loop->timers);
@@ -313,7 +399,7 @@ timers_init(struct birdloop *loop)
static void
timers_fire(struct birdloop *loop)
{
- xxx_time base_time;
+ btime base_time;
timer2 *t;
times_update(loop);
@@ -326,16 +412,15 @@ timers_fire(struct birdloop *loop)
if (t->recurrent)
{
- xxx_time after = t->recurrent;
- xxx_time delta = loop->last_time - t->expires;
+ btime when = t->expires + t->recurrent;
- if (t->randomize)
- after += random() % (t->randomize + 1);
+ if (when <= loop->last_time)
+ when = loop->last_time + t->recurrent;
- if (delta > after)
- delta = 0;
+ if (t->randomize)
+ when += random() % (t->randomize + 1);
- tm2_start(t, after - delta);
+ tm2_set(t, when);
}
else
tm2_stop(t);
@@ -345,15 +430,16 @@ timers_fire(struct birdloop *loop)
}
+
static void
sockets_init(struct birdloop *loop)
{
- list_init(&poll->sock_list);
- poll->sock_num = 0;
+ init_list(&loop->sock_list);
+ loop->sock_num = 0;
BUFFER_INIT(loop->poll_sk, loop->pool, 4);
BUFFER_INIT(loop->poll_fd, loop->pool, 4);
- poll_changed = 0;
+ loop->poll_changed = 1; /* add wakeup fd */
}
static void
@@ -372,7 +458,9 @@ sockets_add(struct birdloop *loop, sock *s)
void
sk_start(sock *s)
{
- sockets_add(xxx_loop, s);
+ struct birdloop *loop = birdloop_current();
+
+ sockets_add(loop, s);
}
static void
@@ -382,7 +470,7 @@ sockets_remove(struct birdloop *loop, sock *s)
loop->sock_num--;
if (s->index >= 0)
- s->poll_sk.data[sk->index] = NULL;
+ loop->poll_sk.data[s->index] = NULL;
s->index = -1;
loop->poll_changed = 1;
@@ -393,7 +481,9 @@ sockets_remove(struct birdloop *loop, sock *s)
void
sk_stop(sock *s)
{
- sockets_remove(xxx_loop, s);
+ struct birdloop *loop = birdloop_current();
+
+ sockets_remove(loop, s);
if (loop->poll_active)
{
@@ -413,7 +503,7 @@ static void
sockets_update(struct birdloop *loop, sock *s)
{
if (s->index >= 0)
- s->poll_fd.data[s->index].events = sk_want_events(s);
+ loop->poll_fd.data[s->index].events = sk_want_events(s);
}
static void
@@ -427,7 +517,7 @@ sockets_prepare(struct birdloop *loop)
int i = 0;
node *n;
- WALK_LIST(n, &loop->sock_list)
+ WALK_LIST(n, loop->sock_list)
{
sock *s = SKIP_BACK(sock, n, n);
@@ -470,6 +560,8 @@ sockets_close_fds(struct birdloop *loop)
loop->close_scheduled = 0;
}
+int sk_read(sock *s);
+int sk_write(sock *s);
static void
sockets_fire(struct birdloop *loop)
@@ -507,11 +599,20 @@ sockets_fire(struct birdloop *loop)
}
+
+static void * birdloop_main(void *arg);
+
struct birdloop *
birdloop_new(pool *p)
{
+ /* FIXME: this init should be elsewhere and thread-safe */
+ static int init = 0;
+ if (!init)
+ { birdloop_init_current(); init = 1; }
+
struct birdloop *loop = mb_allocz(p, sizeof(struct birdloop));
- p->pool = p;
+ loop->pool = p;
+ pthread_mutex_init(&loop->mutex, NULL);
times_init(loop);
wakeup_init(loop);
@@ -520,28 +621,58 @@ birdloop_new(pool *p)
timers_init(loop);
sockets_init(loop);
+
+ int rv = pthread_create(&loop->thread, NULL, birdloop_main, loop);
+ if (rv < 0)
+ die("pthread_create(): %m");
+
return loop;
}
void
birdloop_enter(struct birdloop *loop)
{
- pthread_mutex_lock(loop->mutex);
+ /* TODO: these functions could save and restore old context */
+ pthread_mutex_lock(&loop->mutex);
+ birdloop_set_current(loop);
}
void
birdloop_leave(struct birdloop *loop)
{
- pthread_mutex_unlock(loop->mutex);
+ /* TODO: these functions could save and restore old context */
+ birdloop_set_current(NULL);
+ pthread_mutex_unlock(&loop->mutex);
}
+void
+birdloop_mask_wakeups(struct birdloop *loop)
+{
+ pthread_mutex_lock(&loop->mutex);
+ loop->wakeup_masked = 1;
+ pthread_mutex_unlock(&loop->mutex);
+}
void
-birdloop_main(struct birdloop *loop)
+birdloop_unmask_wakeups(struct birdloop *loop)
{
+ pthread_mutex_lock(&loop->mutex);
+ if (loop->wakeup_masked == 2)
+ wakeup_do_kick(loop);
+ loop->wakeup_masked = 0;
+ pthread_mutex_unlock(&loop->mutex);
+}
+
+static void *
+birdloop_main(void *arg)
+{
+ struct birdloop *loop = arg;
timer2 *t;
- int timeout;
+ int rv, timeout;
+ birdloop_set_current(loop);
+
+ pthread_mutex_lock(&loop->mutex);
while (1)
{
events_fire(loop);
@@ -559,7 +690,7 @@ birdloop_main(struct birdloop *loop)
sockets_prepare(loop);
loop->poll_active = 1;
- pthread_mutex_unlock(loop->mutex);
+ pthread_mutex_unlock(&loop->mutex);
try:
rv = poll(loop->poll_fd.data, loop->poll_fd.used, timeout);
@@ -570,7 +701,7 @@ birdloop_main(struct birdloop *loop)
die("poll: %m");
}
- pthread_mutex_lock(loop->mutex);
+ pthread_mutex_lock(&loop->mutex);
loop->poll_active = 0;
if (loop->close_scheduled)
@@ -581,6 +712,8 @@ birdloop_main(struct birdloop *loop)
timers_fire(loop);
}
+
+ return NULL;
}
diff --git a/proto/bfd/io.h b/proto/bfd/io.h
index 7fc45194..c186ba2b 100644
--- a/proto/bfd/io.h
+++ b/proto/bfd/io.h
@@ -1,44 +1,69 @@
+/*
+ * BIRD -- I/O and event loop
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
-typedef s64 xxx_time;
+#ifndef _BIRD_BFD_IO_H_
+#define _BIRD_BFD_IO_H_
-typedef struct timer
+#include "nest/bird.h"
+#include "lib/lists.h"
+#include "lib/resource.h"
+#include "lib/event.h"
+#include "lib/socket.h"
+// #include "lib/timer.h"
+
+
+#define S *1000000
+#define MS *1000
+#define US *1
+#define TO_S /1000000
+#define TO_MS /1000
+#define TO_US /1
+
+
+typedef s64 btime;
+
+typedef struct timer2
{
resource r;
void (*hook)(struct timer2 *);
void *data;
- xxx_time expires; /* 0=inactive */
- unsigned randomize; /* Amount of randomization */
- unsigned recurrent; /* Timer recurrence */
+ btime expires; /* 0=inactive */
+ uint randomize; /* Amount of randomization */
+ uint recurrent; /* Timer recurrence */
int index;
-} timer;
+} timer2;
+btime current_time(void);
void ev2_schedule(event *e);
-
timer2 *tm2_new(pool *p);
-void tm2_start(timer2 *t, xxx_time after);
+void tm2_set(timer2 *t, btime when);
+void tm2_start(timer2 *t, btime after);
void tm2_stop(timer2 *t);
-static inline xxx_time
-tm2_remains(timer2 *t)
+static inline int
+tm2_active(timer2 *t)
{
- return (t->expires > xxxnow) ? t->expires - xxxnow : 0;
+ return t->expires != 0;
}
-static inline void
-tm2_start_max(timer2 *t, xxx_time after)
+static inline btime
+tm2_remains(timer2 *t)
{
- xxx_time rem = tm2_remains(t);
- tm2_start(t, MAX(rem, after));
+ btime now = current_time();
+ return (t->expires > now) ? (t->expires - now) : 0;
}
static inline timer2 *
-tm2_new_set(pool *p, void (*hook)(struct timer2 *), void *data, uint rec, uint rand)
+tm2_new_init(pool *p, void (*hook)(struct timer2 *), void *data, uint rec, uint rand)
{
timer2 *t = tm2_new(p);
t->hook = hook;
@@ -48,6 +73,14 @@ tm2_new_set(pool *p, void (*hook)(struct timer2 *), void *data, uint rec, uint r
return t;
}
+/*
+static inline void
+tm2_start_max(timer2 *t, btime after)
+{
+ btime rem = tm2_remains(t);
+ tm2_start(t, _MAX(rem, after));
+}
+*/
void sk_start(sock *s);
@@ -58,5 +91,8 @@ void sk_stop(sock *s);
struct birdloop *birdloop_new(pool *p);
void birdloop_enter(struct birdloop *loop);
void birdloop_leave(struct birdloop *loop);
-void birdloop_main(struct birdloop *loop);
+void birdloop_mask_wakeups(struct birdloop *loop);
+void birdloop_unmask_wakeups(struct birdloop *loop);
+
+#endif /* _BIRD_BFD_IO_H_ */
diff --git a/proto/bfd/packets.c b/proto/bfd/packets.c
index e48a5aaa..8f7a1f65 100644
--- a/proto/bfd/packets.c
+++ b/proto/bfd/packets.c
@@ -1,11 +1,10 @@
+/*
+ * BIRD -- Bidirectional Forwarding Detection (BFD)
+ *
+ * Can be freely distributed and used under the terms of the GNU GPL.
+ */
-
-#define BFD_FLAG_POLL (1 << 5)
-#define BFD_FLAG_FINAL (1 << 4)
-#define BFD_FLAG_CPI (1 << 3)
-#define BFD_FLAG_AP (1 << 2)
-#define BFD_FLAG_DEMAND (1 << 1)
-#define BFD_FLAG_MULTIPOINT (1 << 0)
+#include "bfd.h"
struct bfd_ctl_packet
@@ -21,12 +20,14 @@ struct bfd_ctl_packet
u32 req_min_echo_rx_int;
};
+#define BFD_BASE_LEN sizeof(struct bfd_ctl_packet)
+
-static inline void bfd_pack_vdiag(u8 version, u8 diag)
+static inline u8 bfd_pack_vdiag(u8 version, u8 diag)
{ return (version << 5) | diag; }
-static inline void bfd_pack_flags(u8 state, u8 flags)
-{ return (state << 6) | diag; }
+static inline u8 bfd_pack_flags(u8 state, u8 flags)
+{ return (state << 6) | flags; }
static inline u8 bfd_pkt_get_version(struct bfd_ctl_packet *pkt)
{ return pkt->vdiag >> 5; }
@@ -45,17 +46,17 @@ static inline void bfd_pkt_set_state(struct bfd_ctl_packet *pkt, u8 val)
void
bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final)
{
- sock *sk = p->skX;
- struct bfd_ctl_packet *pkt = (struct ospf_packet *) sk->tbuf;
+ sock *sk = s->bsock->sk;
+ struct bfd_ctl_packet *pkt = (struct bfd_ctl_packet *) sk->tbuf;
pkt->vdiag = bfd_pack_vdiag(1, s->loc_diag);
pkt->flags = bfd_pack_flags(s->loc_state, 0);
pkt->detect_mult = s->detect_mult;
- pkt->length = 24;
+ pkt->length = BFD_BASE_LEN;
pkt->snd_id = htonl(s->loc_id);
pkt->rcv_id = htonl(s->rem_id);
- pkt->des_min_tx_int = htonl(s->des_min_tx_int);
- pkt->req_min_rx_int = htonl(s->req_min_rx_int);
+ pkt->des_min_tx_int = htonl(s->des_min_tx_new);
+ pkt->req_min_rx_int = htonl(s->req_min_rx_new);
pkt->req_min_echo_rx_int = 0;
if (final)
@@ -63,15 +64,21 @@ bfd_send_ctl(struct bfd_proto *p, struct bfd_session *s, int final)
else if (s->poll_active)
pkt->flags |= BFD_FLAG_POLL;
- // XXX
- sk_send_to(sk, len, dst, 0);
+ if (sk->tbuf != sk->tpos)
+ log(L_ERR "%s: old packet was overwritten in TX buffer", p->p.name);
+
+ sk_send_to(sk, pkt->length, s->addr, sk->dport);
}
-int
-bfd_ctl_rx_hook(sock *sk, int len)
+#define DROP(DSC,VAL) do { err_dsc = DSC; err_val = VAL; goto drop; } while(0)
+
+static int
+bfd_rx_hook(sock *sk, int len)
{
- struct bfd_proto *p = sk->data;
- struct bfd_ctl_packet *pkt =sk->rbuf;
+ struct bfd_proto *p = sk->data;
+ struct bfd_ctl_packet *pkt = (struct bfd_ctl_packet *) sk->rbuf;
+ const char *err_dsc = NULL;
+ uint err_val = 0;
if (len < BFD_BASE_LEN)
DROP("too short", len);
@@ -108,11 +115,11 @@ bfd_ctl_rx_hook(sock *sk, int len)
if (ps > BFD_STATE_DOWN)
DROP("invalid init state", ps);
- s = bfd_find_session_by_ip(p, sk->faddr);
+ s = bfd_find_session_by_addr(p, sk->faddr);
/* FIXME: better session matching and message */
if (!s || !s->opened)
- return;
+ return 1;
}
/* FIXME: better authentication handling and message */
@@ -120,17 +127,18 @@ bfd_ctl_rx_hook(sock *sk, int len)
DROP("authentication not supported", 0);
- u32 old_rx_int = s->des_min_tx_int;
- u32 old_tx_int = s->rem_min_rx_int;
+ u32 old_tx_int = s->des_min_tx_int;
+ u32 old_rx_int = s->rem_min_rx_int;
s->rem_id = ntohl(pkt->snd_id);
s->rem_state = bfd_pkt_get_state(pkt);
+ s->rem_diag = bfd_pkt_get_diag(pkt);
s->rem_demand_mode = pkt->flags & BFD_FLAG_DEMAND;
s->rem_min_tx_int = ntohl(pkt->des_min_tx_int);
s->rem_min_rx_int = ntohl(pkt->req_min_rx_int);
s->rem_detect_mult = pkt->detect_mult;
- bfd_session_process_ctl(s, pkt->flags, xxx);
+ bfd_session_process_ctl(s, pkt->flags, old_tx_int, old_rx_int);
return 1;
drop:
@@ -138,10 +146,17 @@ bfd_ctl_rx_hook(sock *sk, int len)
return 1;
}
+static void
+bfd_err_hook(sock *sk, int err)
+{
+ struct bfd_proto *p = sk->data;
+ log(L_ERR "%s: Socket error: %m", p->p.name, err);
+}
+
sock *
bfd_open_rx_sk(struct bfd_proto *p, int multihop)
{
- sock *sk = sk_new(p->p.pool);
+ sock *sk = sk_new(p->tpool);
sk->type = SK_UDP;
sk->sport = !multihop ? BFD_CONTROL_PORT : BFD_MULTI_CTL_PORT;
sk->data = p;
@@ -149,33 +164,59 @@ bfd_open_rx_sk(struct bfd_proto *p, int multihop)
sk->rbsize = 64; // XXX
sk->rx_hook = bfd_rx_hook;
sk->err_hook = bfd_err_hook;
-
- sk->flags = SKF_LADDR_RX | (!multihop ? SKF_TTL_RX : 0);
+
+ /* TODO: configurable ToS and priority */
+ sk->tos = IP_PREC_INTERNET_CONTROL;
+ sk->priority = sk_priority_control;
+ sk->flags = SKF_THREAD | SKF_LADDR_RX | (!multihop ? SKF_TTL_RX : 0);
+
+#ifdef IPV6
+ sk->flags |= SKF_V6ONLY;
+#endif
if (sk_open(sk) < 0)
goto err;
+
+ sk_start(sk);
+ return sk;
+
+ err:
+ rfree(sk);
+ return NULL;
}
static inline sock *
bfd_open_tx_sk(struct bfd_proto *p, ip_addr local, struct iface *ifa)
{
- sock *sk = sk_new(p->p.pool);
+ sock *sk = sk_new(p->tpool);
sk->type = SK_UDP;
sk->saddr = local;
+ sk->dport = ifa ? BFD_CONTROL_PORT : BFD_MULTI_CTL_PORT;
+ sk->iface = ifa;
sk->data = p;
sk->tbsize = 64; // XXX
sk->err_hook = bfd_err_hook;
-
- sk->iface = new;
- sk->tos = PATT->tx_tos;
- sk->priority = PATT->tx_priority;
- sk->ttl = PATT->ttl_security ? 255 : 1;
+ /* TODO: configurable ToS, priority and TTL security */
+ sk->tos = IP_PREC_INTERNET_CONTROL;
+ sk->priority = sk_priority_control;
+ sk->ttl = ifa ? 255 : -1;
+ sk->flags = SKF_THREAD;
+
+#ifdef IPV6
+ sk->flags |= SKF_V6ONLY;
+#endif
if (sk_open(sk) < 0)
goto err;
+ sk_start(sk);
+ return sk;
+
+ err:
+ rfree(sk);
+ return NULL;
}
struct bfd_socket *
@@ -183,14 +224,14 @@ bfd_get_socket(struct bfd_proto *p, ip_addr local, struct iface *ifa)
{
struct bfd_socket *sk;
- WALK_LIST(sk, p->sockets)
+ WALK_LIST(sk, p->sock_list)
if (ipa_equal(sk->sk->saddr, local) && (sk->sk->iface == ifa))
return sk->uc++, sk;
- sk = mb_allocz(p->p.pool, sizeof(struct bfd_socket));
+ sk = mb_allocz(p->tpool, sizeof(struct bfd_socket));
sk->sk = bfd_open_tx_sk(p, local, ifa);
sk->uc = 1;
- add_tail(&p->sockets, &sk->n);
+ add_tail(&p->sock_list, &sk->n);
return sk;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-27 18:12:30 +0000