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Changes pipes to transfer all routes between routing table, not just optimal routes.

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This commit is contained in:
Ondrej Zajicek 2009-05-31 15:24:27 +02:00
parent 23e563d86b
commit 23ac9e9a9e
9 changed files with 97 additions and 42 deletions
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2
nest/proto-hooks.c
View file

@ -188,6 +188,8 @@ void ifa_notify(struct proto *p, unsigned flags, struct ifa *a)
* belonging to network @net being replaced by a new route @new with
* extended attributes @attrs. Either @new or @old or both can be %NULL
* if the corresponding route doesn't exist.
*
* FIXME documentation
*/
void rt_notify(struct proto *p, net *net, rte *new, rte *old, ea_list *attrs)
{ DUMMY; }

1
nest/protocol.h
View file

@ -100,6 +100,7 @@ struct proto {
unsigned debug; /* Debugging flags */
unsigned preference; /* Default route preference */
int min_scope; /* Minimal route scope accepted */
unsigned accept_ra_types; /* Which types of route announcements are accepted (RA_OPTIMAL or RA_ANY) */
unsigned disabled; /* Manually disabled */
unsigned proto_state; /* Protocol state machine (see below) */
unsigned core_state; /* Core state machine (see below) */

8
nest/route.h
View file

@ -146,6 +146,7 @@ typedef struct network {
typedef struct rte {
struct rte *next;
net *net; /* Network this RTE belongs to */
struct proto *sender; /* Protocol instance that sent the route to the routing table */
struct rta *attrs; /* Attributes of this route */
byte flags; /* Flags (REF_...) */
byte pflags; /* Protocol-specific flags */
@ -178,6 +179,10 @@ typedef struct rte {
#define REF_COW 1 /* Copy this rte on write */
/* Types of route announcement, also used as flags */
#define RA_OPTIMAL 1 /* Announcement of optimal route change */
#define RA_ANY 2 /* Announcement of any route change */
struct config;
void rt_init(void);
@ -191,6 +196,7 @@ static inline net *net_get(rtable *tab, ip_addr addr, unsigned len) { return (ne
rte *rte_find(net *net, struct proto *p);
rte *rte_get_temp(struct rta *);
void rte_update(rtable *tab, net *net, struct proto *p, rte *new);
void rte_update2(rtable *tab, net *net, struct proto *p, struct proto *src, rte *new);
void rte_discard(rtable *tab, rte *old);
void rte_dump(rte *);
void rte_free(rte *);
@ -230,7 +236,7 @@ void rt_show(struct rt_show_data *);
typedef struct rta {
struct rta *next, **pprev; /* Hash chain */
struct proto *proto; /* Protocol instance */
struct proto *proto; /* Protocol instance that originally created the route */
unsigned uc; /* Use count */
byte source; /* Route source (RTS_...) */
byte scope; /* Route scope (SCOPE_... -- see ip.h) */

99
nest/rt-table.c
View file

@ -158,7 +158,7 @@ rte_trace_out(unsigned int flag, struct proto *p, rte *e, char *msg)
}
static inline void
do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *tmpa, int class)
do_rte_announce(struct announce_hook *a, int type, net *net, rte *new, rte *old, ea_list *tmpa, int class)
{
struct proto *p = a->proto;
rte *new0 = new;
@ -234,14 +234,17 @@ do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *
/**
* rte_announce - announce a routing table change
* @tab: table the route has been added to
* @type: type of route announcement (RA_OPTIMAL or RA_ANY)
* @net: network in question
* @new: the new route to be announced
* @old: previous optimal route for the same network
* @old: the previous route for the same network
* @tmpa: a list of temporary attributes belonging to the new route
*
* This function gets a routing table update and announces it
* to all protocols connected to the same table by their announcement hooks.
*
* previous optimal route for the same network FIXME
*
* For each such protocol, we first call its import_control() hook which
* performs basic checks on the route (each protocol has a right to veto
* or force accept of the route before any filter is asked) and adds default
@ -250,7 +253,7 @@ do_rte_announce(struct announce_hook *a, net *net, rte *new, rte *old, ea_list *
* route, the rt_notify() hook of the protocol gets called.
*/
static void
rte_announce(rtable *tab, net *net, rte *new, rte *old, ea_list *tmpa)
rte_announce(rtable *tab, int type, net *net, rte *new, rte *old, ea_list *tmpa)
{
struct announce_hook *a;
int class = ipa_classify(net->n.prefix);
@ -258,7 +261,8 @@ rte_announce(rtable *tab, net *net, rte *new, rte *old, ea_list *tmpa)
WALK_LIST(a, tab->hooks)
{
ASSERT(a->proto->core_state == FS_HAPPY || a->proto->core_state == FS_FEEDING);
do_rte_announce(a, net, new, old, tmpa, class);
if (a->proto->accept_ra_types == type)
do_rte_announce(a, type, net, new, old, tmpa, class);
}
}
@ -271,7 +275,7 @@ rte_validate(rte *e)
if (ipa_nonzero(ipa_and(n->n.prefix, ipa_not(ipa_mkmask(n->n.pxlen)))))
{
log(L_BUG "Ignoring bogus prefix %I/%d received via %s",
n->n.prefix, n->n.pxlen, e->attrs->proto->name);
n->n.prefix, n->n.pxlen, e->sender->name);
return 0;
}
if (n->n.pxlen)
@ -290,14 +294,14 @@ rte_validate(rte *e)
return 1;
}
log(L_WARN "Ignoring bogus route %I/%d received via %s",
n->n.prefix, n->n.pxlen, e->attrs->proto->name);
n->n.prefix, n->n.pxlen, e->sender->name);
return 0;
}
if ((c & IADDR_SCOPE_MASK) < e->attrs->proto->min_scope)
if ((c & IADDR_SCOPE_MASK) < e->sender->min_scope)
{
log(L_WARN "Ignoring %s scope route %I/%d received from %I via %s",
ip_scope_text(c & IADDR_SCOPE_MASK),
n->n.prefix, n->n.pxlen, e->attrs->from, e->attrs->proto->name);
n->n.prefix, n->n.pxlen, e->attrs->from, e->sender->name);
return 0;
}
}
@ -337,7 +341,7 @@ rte_same(rte *x, rte *y)
}
static void
rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmpa)
rte_recalculate(rtable *table, net *net, struct proto *p, struct proto *src, rte *new, ea_list *tmpa)
{
rte *old_best = net->routes;
rte *old = NULL;
@ -346,7 +350,7 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
k = &net->routes; /* Find and remove original route from the same protocol */
while (old = *k)
{
if (old->attrs->proto == p)
if (old->attrs->proto == src)
{
if (new && rte_same(old, new))
{
@ -362,10 +366,14 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
k = &old->next;
}
log(L_WARN "ANNOUNCE %I/%d from %s (%s) %p", net->n.prefix, net->n.pxlen, p->name, src->name, old_best);
rte_announce(table, RA_ANY, net, new, old, tmpa);
if (new && rte_better(new, old_best)) /* It's a new optimal route => announce and relink it */
{
rte_trace_in(D_ROUTES, p, new, "added [best]");
rte_announce(table, net, new, old_best, tmpa);
rte_announce(table, RA_OPTIMAL, net, new, old_best, tmpa);
new->next = net->routes;
net->routes = new;
}
@ -377,7 +385,7 @@ rte_recalculate(rtable *table, net *net, struct proto *p, rte *new, ea_list *tmp
for(s=net->routes; s; s=s->next)
if (rte_better(s, r))
r = s;
rte_announce(table, net, r, old_best, tmpa);
rte_announce(table, RA_OPTIMAL, net, r, old_best, tmpa);
if (r) /* Re-link the new optimal route */
{
k = &net->routes;
@ -477,12 +485,19 @@ rte_update_unlock(void)
*/
void
rte_update(rtable *table, net *net, struct proto *p, rte *new)
{
rte_update2(table, net, p, p, new);
}
void
rte_update2(rtable *table, net *net, struct proto *p, struct proto *src, rte *new)
{
ea_list *tmpa = NULL;
rte_update_lock();
if (new)
{
new->sender = p;
struct filter *filter = p->in_filter;
/* Do not filter routes going to the secondary side of the pipe,
@ -501,8 +516,8 @@ rte_update(rtable *table, net *net, struct proto *p, rte *new)
rte_trace_in(D_FILTERS, p, new, "filtered out");
goto drop;
}
if (p->make_tmp_attrs)
tmpa = p->make_tmp_attrs(new, rte_update_pool);
if (src->make_tmp_attrs)
tmpa = src->make_tmp_attrs(new, rte_update_pool);
if (filter)
{
ea_list *old_tmpa = tmpa;
@ -512,14 +527,14 @@ rte_update(rtable *table, net *net, struct proto *p, rte *new)
rte_trace_in(D_FILTERS, p, new, "filtered out");
goto drop;
}
if (tmpa != old_tmpa && p->store_tmp_attrs)
p->store_tmp_attrs(new, tmpa);
if (tmpa != old_tmpa && src->store_tmp_attrs)
src->store_tmp_attrs(new, tmpa);
}
if (!(new->attrs->aflags & RTAF_CACHED)) /* Need to copy attributes */
new->attrs = rta_lookup(new->attrs);
new->flags |= REF_COW;
}
rte_recalculate(table, net, p, new, tmpa);
rte_recalculate(table, net, p, src, new, tmpa);
rte_update_unlock();
return;
@ -531,11 +546,8 @@ drop:
void
rte_discard(rtable *t, rte *old) /* Non-filtered route deletion, used during garbage collection */
{
net *n = old->net;
struct proto *p = old->attrs->proto;
rte_update_lock();
rte_recalculate(t, n, p, NULL, NULL);
rte_recalculate(t, old->net, old->sender, old->attrs->proto, NULL, NULL);
rte_update_unlock();
}
@ -673,8 +685,8 @@ again:
ncnt++;
rescan:
for (e=n->routes; e; e=e->next, rcnt++)
if (e->attrs->proto->core_state != FS_HAPPY &&
e->attrs->proto->core_state != FS_FEEDING)
if (e->sender->core_state != FS_HAPPY &&
e->sender->core_state != FS_FEEDING)
{
rte_discard(tab, e);
rdel++;
@ -827,6 +839,18 @@ rt_commit(struct config *new, struct config *old)
DBG("\tdone\n");
}
static inline void
do_feed_baby(struct proto *p, int type, struct announce_hook *h, net *n, rte *e)
{
struct proto *q = e->attrs->proto;
ea_list *tmpa;
rte_update_lock();
tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL;
do_rte_announce(h, type, n, e, NULL, tmpa, ipa_classify(n->n.prefix));
rte_update_unlock();
}
/**
* rt_feed_baby - advertise routes to a new protocol
* @p: protocol to be fed
@ -865,19 +889,24 @@ again:
FIB_ITERATE_PUT(fit, fn);
return 0;
}
if (e)
{
struct proto *q = e->attrs->proto;
ea_list *tmpa;
if (p->core_state != FS_FEEDING)
return 1; /* In the meantime, the protocol fell down. */
rte_update_lock();
tmpa = q->make_tmp_attrs ? q->make_tmp_attrs(e, rte_update_pool) : NULL;
do_rte_announce(h, n, e, NULL, tmpa, ipa_classify(n->n.prefix));
rte_update_unlock();
max_feed--;
}
if (p->accept_ra_types == RA_OPTIMAL)
if (e)
{
if (p->core_state != FS_FEEDING)
return 1; /* In the meantime, the protocol fell down. */
do_feed_baby(p, RA_OPTIMAL, h, n, e);
max_feed--;
}
if (p->accept_ra_types == RA_ANY)
for(e = n->routes; e != NULL; e = e->next)
{
if (p->core_state != FS_FEEDING)
return 1; /* In the meantime, the protocol fell down. */
do_feed_baby(p, RA_ANY, h, n, e);
max_feed--;
}
}
FIB_ITERATE_END(fn);
p->feed_ahook = h->next;

1
proto/bgp/bgp.c
View file

@ -753,6 +753,7 @@ bgp_init(struct proto_config *C)
struct proto *P = proto_new(C, sizeof(struct bgp_proto));
struct bgp_proto *p = (struct bgp_proto *) P;
P->accept_ra_types = RA_OPTIMAL;
P->rt_notify = bgp_rt_notify;
P->rte_better = bgp_rte_better;
P->import_control = bgp_import_control;

1
proto/ospf/ospf.c
View file

@ -224,6 +224,7 @@ ospf_init(struct proto_config *c)
p->import_control = ospf_import_control;
p->make_tmp_attrs = ospf_make_tmp_attrs;
p->store_tmp_attrs = ospf_store_tmp_attrs;
p->accept_ra_types = RA_OPTIMAL;
p->rt_notify = ospf_rt_notify;
p->if_notify = ospf_iface_notify;
p->rte_better = ospf_rte_better;

25
proto/pipe/pipe.c
View file

@ -31,12 +31,16 @@
#include "pipe.h"
static void
pipe_send(struct pipe_proto *p, rtable *dest, net *n, rte *new, rte *old UNUSED, ea_list *attrs)
pipe_send(struct pipe_proto *p, rtable *dest, net *n, rte *new, rte *old, ea_list *attrs)
{
struct proto *src;
net *nn;
rte *e;
rta a;
if (!new && !old)
return;
if (dest->pipe_busy)
{
log(L_ERR "Pipe loop detected when sending %I/%d to table %s",
@ -47,17 +51,24 @@ pipe_send(struct pipe_proto *p, rtable *dest, net *n, rte *new, rte *old UNUSED,
if (new)
{
memcpy(&a, new->attrs, sizeof(rta));
a.proto = &p->p;
a.source = RTS_PIPE;
a.aflags = 0;
a.eattrs = attrs;
e = rte_get_temp(&a);
e->net = nn;
/* Copy protocol specific embedded attributes. */
memcpy(&(e->u), &(new->u), sizeof(e->u));
src = new->attrs->proto;
}
else
e = NULL;
{
e = NULL;
src = old->attrs->proto;
}
dest->pipe_busy = 1;
rte_update(dest, nn, &p->p, e);
rte_update2(dest, nn, &p->p, src, e);
dest->pipe_busy = 0;
}
@ -82,7 +93,7 @@ pipe_rt_notify_sec(struct proto *P, net *net, rte *new, rte *old, ea_list *attrs
static int
pipe_import_control(struct proto *P, rte **ee, ea_list **ea UNUSED, struct linpool *p UNUSED)
{
struct proto *pp = (*ee)->attrs->proto;
struct proto *pp = (*ee)->sender;
if (pp == P || pp == &((struct pipe_proto *) P)->phantom->p)
return -1; /* Avoid local loops automatically */
@ -106,6 +117,7 @@ pipe_start(struct proto *P)
memcpy(ph, p, sizeof(struct pipe_proto));
p->phantom = ph;
ph->phantom = p;
ph->p.accept_ra_types = RA_ANY;
ph->p.rt_notify = pipe_rt_notify_sec;
ph->p.proto_state = PS_UP;
ph->p.core_state = ph->p.core_goal = FS_HAPPY;
@ -141,6 +153,7 @@ pipe_init(struct proto_config *C)
struct pipe_proto *p = (struct pipe_proto *) P;
p->peer = c->peer->table;
P->accept_ra_types = RA_ANY;
P->rt_notify = pipe_rt_notify_pri;
P->import_control = pipe_import_control;
return P;

1
proto/rip/rip.c
View file

@ -946,6 +946,7 @@ rip_rte_remove(net *net UNUSED, rte *rte)
void
rip_init_instance(struct proto *p)
{
p->accept_ra_types = RA_OPTIMAL;
p->if_notify = rip_if_notify;
p->rt_notify = rip_rt_notify;
p->import_control = rip_import_control;

1
sysdep/unix/krt.c
View file

@ -875,6 +875,7 @@ krt_init(struct proto_config *c)
{
struct krt_proto *p = proto_new(c, sizeof(struct krt_proto));
p->p.accept_ra_types = RA_OPTIMAL;
p->p.rt_notify = krt_notify;
p->p.min_scope = SCOPE_HOST;
return &p->p;