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BFD work in progress.

Browse source 
Now it compiles and mostly works.
This commit is contained in:
Ondrej Zajicek 2013-09-16 23:57:40 +02:00
parent bf139664aa
commit 6a8d3f1c1f
21 changed files with 907 additions and 364 deletions
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11
conf/confbase.Y
View file

@ -73,6 +73,7 @@ CF_DECLS
%type <iface> ipa_scope
%type <i> expr bool pxlen
%type <i32> expr_us
%type <time> datetime
%type <a> ipa
%type <px> prefix prefix_or_ipa
@ -86,7 +87,7 @@ CF_DECLS
%left '!'
%nonassoc '.'
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO)
CF_KEYWORDS(DEFINE, ON, OFF, YES, NO, XS, XMS, XUS)
CF_GRAMMAR
@ -124,6 +125,14 @@ expr:
$$ = SYM_VAL($1).i; }
;
/* XXX fix X* symbols, they collide with macros */
expr_us:
expr XS { $$ = (u32) $1 * 1000000; }
| expr XMS { $$ = (u32) $1 * 1000; }
| expr XUS { $$ = (u32) $1 * 1; }
;
/* expr_u16: expr { check_u16($1); $$ = $1; }; */
/* Switches */

6
configure.in
View file

@ -47,11 +47,11 @@ AC_SUBST(runtimedir)
if test "$enable_ipv6" = yes ; then
ip=ipv6
SUFFIX=6
all_protocols=bgp,ospf,pipe,radv,rip,static
all_protocols=bfd,bgp,ospf,pipe,radv,rip,static
else
ip=ipv4
SUFFIX=""
all_protocols=bgp,ospf,pipe,rip,static
all_protocols=bfd,bgp,ospf,pipe,rip,static
fi
if test "$given_suffix" = yes ; then
@ -92,7 +92,7 @@ if test "$bird_cflags_default" = yes ; then
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
BIRD_CHECK_GCC_OPTION(bird_cv_c_option_fno_strict_overflow, -fno-strict-overflow)
CFLAGS="$CFLAGS -Wall -Wstrict-prototypes -Wno-parentheses"
CFLAGS="$CFLAGS -pthread -Wall -Wstrict-prototypes -Wno-parentheses"
BIRD_ADD_GCC_OPTION(bird_cv_c_option_wno_pointer_sign, -Wno-pointer-sign)
BIRD_ADD_GCC_OPTION(bird_cv_c_option_fno_strict_aliasing, -fno-strict-aliasing)
BIRD_ADD_GCC_OPTION(bird_cv_c_option_fno_strict_overflow, -fno-strict-overflow)

114
lib/hash.h
View file

@ -1,62 +1,110 @@
#define HASH(type) struct { type **data; uint used, size; }
#define HASH(type) struct { type **data; uint count, order; }
#define HASH_TYPE(v) typeof(** (v).data)
#define HASH_SIZE(v) ((v).size * sizeof(* (v).data))
#define HASH_SIZE(v) (1 << (v).order)
#define HASH_MASK(v) ((1 << (v).order)-1)
#define HASH_INIT(v,pool,isize) \
#define HASH_INIT(v,pool,init_order) \
({ \
(v).used = 0; \
(v).size = (isize); \
(v).data = mb_allocz(pool, HASH_SIZE(v)); \
(v).count = 0; \
(v).order = (init_order); \
(v).data = mb_allocz(pool, HASH_SIZE(v) * sizeof(* (v).data)); \
})
#define HASH_FIND(v,id,key) \
#define HASH_FIND(v,id,key...) \
({ \
HASH_TYPE(v) *_n = (v).data[id##_FN(key, (v).size)]; \
while (_n && !id##_EQ(_n, key)) \
_n = _n->id##_NEXT; \
uint _h = id##_FN((key)) & HASH_MASK(v); \
HASH_TYPE(v) *_n = (v).data[_h]; \
while (_n && !id##_EQ(id##_KEY(_n), (key))) \
_n = id##_NEXT(_n); \
_n; \
})
#define HASH_INSERT(v,id,key,node) \
#define HASH_INSERT(v,id,node) \
({ \
HASH_TYPE(v) **_nn = (v).data + id##_FN(key, (v).size); \
node->id##_NEXT = *_nn; \
uint _h = id##_FN(id##_KEY((node))) & HASH_MASK(v); \
HASH_TYPE(v) **_nn = (v).data + _h; \
id##_NEXT(node) = *_nn; \
*_nn = node; \
(v).count++; \
})
#define HASH_DELETE(v,id,key) \
#define HASH_DO_REMOVE(v,id,_nn) \
({ \
HASH_TYPE(v) **_nn = (v).data + id##_FN(key, (v).size); \
while ((*_nn) && !id##_EQ(*_nn, key)) \
_nn = &((*_nn)->id##_NEXT); \
\
HASH_TYPE(v) *_n = *_nn; \
if (_n) \
*_nn = _n->id##_NEXT; \
{ \
*_nn = id##_NEXT(_n); \
(v).count--; \
} \
_n; \
})
#define HASH_DELETE(v,id,key...) \
({ \
uint _h = id##_FN((key)) & HASH_MASK(v); \
HASH_TYPE(v) **_nn = (v).data + _h; \
\
while ((*_nn) && !id##_EQ(id##_KEY((*_nn)), (key))) \
_nn = &(id##_NEXT((*_nn))); \
\
HASH_DO_REMOVE(v,id,_nn); \
})
#define HASH_REMOVE(v,id,node) \
({ \
HASH_TYPE(v) **_nn = (v).data + id##_FN(key, (v).size); \
while ((*_nn) && (*_nn != (node))) \
_nn = &((*_nn)->id##_NEXT); \
uint _h = id##_FN(id##_KEY((node))) & HASH_MASK(v); \
HASH_TYPE(v) **_nn = (v).data + _h; \
\
HASH_TYPE(v) *_n = *_nn; \
if (_n) \
*_nn = _n->id##_NEXT; \
_n; \
while ((*_nn) && (*_nn != (node))) \
_nn = &(id##_NEXT((*_nn))); \
\
HASH_DO_REMOVE(v,id,_nn); \
})
#define HASH_REHASH(v,id,pool,step) \
({ \
HASH_TYPE(v) *_n, *_n2, **_od; \
uint _i, _s; \
\
_s = HASH_SIZE(v); \
_od = (v).data; \
(v).count = 0; \
(v).order += (step); \
(v).data = mb_allocz(pool, HASH_SIZE(v) * sizeof(* (v).data)); \
\
for (_i = 0; _i < _s; _i++) \
for (_n = _od[_i]; _n && (_n2 = id##_NEXT(_n), 1); _n = _n2) \
HASH_INSERT(v, id, _n); \
\
mb_free(_od); \
})
#define HASH_DEFINE_REHASH_FN(id, type) \
static void id##_REHASH_FN(void *v, pool *p, int step) \
{ HASH_REHASH(* (HASH(type) *) v, id, p, step); }
#define HASH_TRY_REHASH_UP(v,id,pool) \
({ \
if (((v).order < id##_REHASH_MAX) && ((v).count > HASH_SIZE(v))) \
id##_REHASH_FN(&v, pool, 1); \
})
#define HASH_TRY_REHASH_DOWN(v,id,pool) \
({ \
if (((v).order > id##_REHASH_MIN) && ((v).count < HASH_SIZE(v)/2)) \
id##_REHASH_FN(&v, pool, -1); \
})
#define HASH_WALK(v,next,n) \
do { \
HASH_TYPE(v) *n; \
uint _i; \
for (_i = 0; _i < ((v).size); _i++) \
uint _s = HASH_SIZE(v); \
for (_i = 0; _i < _s; _i++) \
for (n = (v).data[_i]; n; n = n->next)
#define HASH_WALK_END } while (0)
@ -66,18 +114,10 @@
do { \
HASH_TYPE(v) *n, *_next; \
uint _i; \
for (_i = 0; _i < ((v).size); _i++) \
uint _s = HASH_SIZE(v); \
for (_i = 0; _i < _s; _i++) \
for (n = (v).data[_i]; n && (_next = n->next, 1); n = _next)
#define HASH_WALK_DELSAFE_END } while (0)
/*
define HASH_REHASH(s) \
({ \
type *_n; \
uint _i; \
for (_i = 0; _i < (size_f); _i++) \
for (_n = (hash)[_i]; _n != NULL; _n =
*/

14
lib/heap.h
View file

@ -72,8 +72,8 @@
**/
#define HEAP_INIT(heap,num,type,less,swap) \
do { \
uns _i = num; \
uns _j, _l; \
uint _i = num; \
uint _j, _l; \
type x; \
while (_i >= 1) \
{ \
@ -89,7 +89,7 @@
**/
#define HEAP_DELMIN(heap,num,type,less,swap) \
do { \
uns _j, _l; \
uint _j, _l; \
type x; \
swap(heap,1,num,x); \
num--; \
@ -102,7 +102,7 @@
**/
#define HEAP_INSERT(heap,num,type,less,swap) \
do { \
uns _j, _u; \
uint _j, _u; \
type x; \
_j = num; \
HEAP_BUBBLE_UP_J(heap,num,less,swap); \
@ -115,7 +115,7 @@
**/
#define HEAP_INCREASE(heap,num,type,less,swap,pos) \
do { \
uns _j, _l; \
uint _j, _l; \
type x; \
_j = pos; \
HEAP_BUBBLE_DOWN_J(heap,num,less,swap); \
@ -128,7 +128,7 @@
**/
#define HEAP_DECREASE(heap,num,type,less,swap,pos) \
do { \
uns _j, _u; \
uint _j, _u; \
type x; \
_j = pos; \
HEAP_BUBBLE_UP_J(heap,num,less,swap); \
@ -139,7 +139,7 @@
**/
#define HEAP_DELETE(heap,num,type,less,swap,pos) \
do { \
uns _j, _l, _u; \
uint _j, _l, _u; \
type x; \
_j = pos; \
swap(heap,_j,num,x); \

19
lib/lists.c
View file

@ -100,6 +100,25 @@ rem_node(node *n)
x->prev = z;
}
/**
* rem2_node - remove a node from a list, with cleanup
* @n: node to be removed
*
* Removes a node @n from the list it's linked in and resets its pointers to NULL.
* Useful if you want to distinguish between linked and unlinked nodes.
*/
LIST_INLINE void
rem2_node(node *n)
{
node *z = n->prev;
node *x = n->next;
z->next = x;
x->prev = z;
n->next = NULL;
n->prev = NULL;
}
/**
* replace_node - replace a node in a list with another one
* @old: node to be removed

1
lib/lists.h
View file

@ -51,6 +51,7 @@ typedef struct list { /* In fact two overlayed nodes */
void add_tail(list *, node *);
void add_head(list *, node *);
void rem_node(node *);
void rem2_node(node *);
void add_tail_list(list *, list *);
void init_list(list *);
void insert_node(node *, node *);

5
lib/resource.c
View file

@ -220,7 +220,8 @@ ralloc(pool *p, struct resclass *c)
bzero(r, c->size);
r->class = c;
add_tail(&p->inside, &r->n);
if (p)
add_tail(&p->inside, &r->n);
return r;
}
@ -423,6 +424,6 @@ buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size)
while (nsize < need)
nsize = STEP_UP(nsize);
*buf = mb_realloc(*buf, nsize*isize);
*buf = mb_realloc(*buf, nsize * item_size);
*size = nsize;
}

6
lib/resource.h
View file

@ -52,7 +52,7 @@ extern pool root_pool;
void *mb_alloc(pool *, unsigned size);
void *mb_allocz(pool *, unsigned size);
void *mb_realloc(pool *p, void *m, unsigned size);
void *mb_realloc(void *m, unsigned size);
void mb_free(void *);
/* Memory pools with linear allocation */
@ -78,6 +78,9 @@ void sl_free(slab *, void *);
* outside resource manager and possibly sysdep code.
*/
void buffer_realloc(void **buf, unsigned *size, unsigned need, unsigned item_size);
#ifdef HAVE_LIBDMALLOC
/*
* The standard dmalloc macros tend to produce lots of namespace
@ -103,3 +106,4 @@ void *xrealloc(void *, unsigned);
#endif
#endif

3
nest/proto.c
View file

@ -718,6 +718,9 @@ protos_build(void)
#ifdef CONFIG_BGP
proto_build(&proto_bgp);
#endif
// XXX
proto_build(&proto_bfd);
proto_pool = rp_new(&root_pool, "Protocols");
proto_flush_event = ev_new(proto_pool);
proto_flush_event->hook = proto_flush_loop;

8
nest/protocol.h
View file

@ -75,7 +75,7 @@ void protos_dump_all(void);
extern struct protocol
proto_device, proto_radv, proto_rip, proto_static,
proto_ospf, proto_pipe, proto_bgp;
proto_ospf, proto_pipe, proto_bgp, proto_bfd;
/*
* Routing Protocol Instance
@ -358,6 +358,12 @@ void proto_notify_state(struct proto *p, unsigned state);
#define D_EVENTS 16 /* Protocol events */
#define D_PACKETS 32 /* Packets sent/received */
#ifndef PARSER
#define TRACE(flags, msg, args...) \
do { if (p->p.debug & flags) log(L_TRACE "%s: " msg, p->p.name , ## args ); } while(0)
#endif
/*
* MRTDump flags
*/

2
proto/bfd/Makefile
View file

@ -1,4 +1,4 @@
source=bfd.c
source=bfd.c packets.c io.c
root-rel=../../
dir-name=proto/bfd

551
proto/bfd/bfd.c
View file

@ -1,138 +1,47 @@
#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)
static inline void bfd_notify_kick(struct bfd_proto *p);
static void
bfd_session_update_state(struct bfd_session *s, uint state, uint diag)
{
u32 id;
for (id = random_u32(); 1; id++)
if (id && !bfd_find_session_by_id(p, id))
break;
struct bfd_proto *p = s->bfd;
int notify;
return id;
}
if (s->loc_state == state)
return;
static void
bfd_add_session(struct bfd_proto *p, ip_addr addr, struct bfd_session_config *opts)
{
birdloop_enter(p->loop);
//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;
struct bfd_session *s = sl_alloc(p->session_slab);
bzero(s, sizeof(struct bfd_session));
notify = !NODE_VALID(&s->n);
if (notify)
add_tail(&p->notify_list, &s->n);
bfd_unlock_sessions(p);
/* 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);
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_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);
HASH_REMOVE(p->session_hash_id, HASH_ID, s);
HASH_REMOVE(p->session_hash_ip, HASH_IP, s);
sl_free(p->session_slab, s);
birdloop_leave(p->loop);
}
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_rx_timer_hook(timer2 *t)
{
struct bfd_session *s = timer->data;
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 (notify)
bfd_notify_kick(p);
}
static void
@ -143,10 +52,43 @@ bfd_session_timeout(struct bfd_session *s)
s->rem_min_tx_int = 0;
s->rem_min_rx_int = 1;
s->rem_demand_mode = 0;
s->rem_detect_mult = 0;
bfd_session_update_state(s, BFD_STATE_DOWN, BFD_DIAG_TIMEOUT);
}
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)
{
btime timeout = (btime) MAX(s->req_min_rx_int, s->rem_min_tx_int) * s->rem_detect_mult;
if (kick)
s->last_rx = current_time();
if (!s->last_rx)
return;
tm2_set(s->hold_timer, s->last_rx + timeout);
}
static void
bfd_session_control_tx_timer(struct bfd_session *s)
{
@ -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->session_slab = sl_new(P->pool, sizeof(struct bfd_session));
init_list(&p->sockets);
p->loop = birdloop_new(P->pool);
p->tpool = rp_new(NULL, "BFD thread root");
pthread_spin_init(&p->lock, PTHREAD_PROCESS_PRIVATE);
HASH_INIT(p->session_hash_id, P->pool, 16);
HASH_INIT(p->session_hash_ip, P->pool, 16);
p->session_slab = sl_new(P->pool, sizeof(struct bfd_session));
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);
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",

69
proto/bfd/bfd.h
View file

@ -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_ */

9
proto/bfd/config.Y
View file

@ -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

255
proto/bfd/io.c
View file

@ -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 void
wakeup_kick(struct birdloop *loop)
{
if (!loop->wakeup_masked)
wakeup_do_kick(loop);
else
loop->wakeup_masked = 2;
}
static inline uint events_waiting(struct birdloop *loop)
{ return !EMPTY_LIST(loop->event_list); }
static inline uint
events_waiting(struct birdloop *loop)
{
return !EMPTY_LIST(loop->event_list);
}
static void
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)
@ -289,13 +367,21 @@ tm2_start(timer2 *t, xxx_time after)
wakeup_kick(loop);
}
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 (when <= loop->last_time)
when = loop->last_time + t->recurrent;
if (t->randomize)
after += random() % (t->randomize + 1);
when += random() % (t->randomize + 1);
if (delta > after)
delta = 0;
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)
{
timer2 *t;
int timeout;
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 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;
}

70
proto/bfd/io.h
View file

@ -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_ */

117
proto/bfd/packets.c
View file

@ -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;
}

3
proto/ospf/topology.c
View file

@ -103,7 +103,8 @@ lsab_alloc(struct proto_ospf *po, unsigned size)
if (po->lsab_used > po->lsab_size)
{
po->lsab_size = MAX(po->lsab_used, 2 * po->lsab_size);
po->lsab = mb_realloc(po->proto.pool, po->lsab, po->lsab_size);
po->lsab = po->lsab ? mb_realloc(po->lsab, po->lsab_size):
mb_alloc(po->proto.pool, po->lsab_size);
}
return ((byte *) po->lsab) + offset;
}

1
proto/rip/rip.c
View file

@ -63,6 +63,7 @@
#define P ((struct rip_proto *) p)
#define P_CF ((struct rip_proto_config *)p->cf)
#undef TRACE
#define TRACE(level, msg, args...) do { if (p->debug & level) { log(L_TRACE "%s: " msg, p->name , ## args); } } while(0)
static struct rip_interface *new_iface(struct proto *p, struct iface *new, unsigned long flags, struct iface_patt *patt);

1
sysdep/config.h
View file

@ -34,6 +34,7 @@ typedef INTEGER_64 s64;
typedef unsigned INTEGER_64 u64;
typedef u8 byte;
typedef u16 word;
typedef unsigned int uint;
#endif

6
sysdep/unix/io.c
View file

@ -1420,7 +1420,9 @@ sk_send_full(sock *s, unsigned len, struct iface *ifa,
}
*/
static int
/* sk_read() and sk_write() are called from BFD's event loop */
int
sk_read(sock *s)
{
switch (s->type)
@ -1497,7 +1499,7 @@ sk_read(sock *s)
}
}
static int
int
sk_write(sock *s)
{
switch (s->type)