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Export table: Fixed segfault on withdraw.

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This happens only if the channel really uses the old route.
This commit is contained in:
Maria Matejka 2021-03-20 21:16:12 +01:00
parent f604915200
commit 1cddde9fa6
2 changed files with 37 additions and 29 deletions
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2
nest/route.h
View File

@ -346,7 +346,7 @@ void rt_feed_channel_abort(struct channel *c);
int rt_reload_channel(struct channel *c);
void rt_reload_channel_abort(struct channel *c);
void rt_prune_sync(rtable *t, int all);
int rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int refeed);
int rte_update_out(struct channel *c, const net_addr *n, struct rte_src *src, rte *new, rte **old_exported, int refeed);
struct rtable_config *rt_new_table(struct symbol *s, uint addr_type);

64
nest/rt-table.c
View File

@ -336,6 +336,27 @@ rte_cow_rta(rte *r, linpool *lp)
return r;
}
/**
* rte_free - delete a &rte
* @e: &rte to be deleted
*
* rte_free() deletes the given &rte from the routing table it's linked to.
*/
void
rte_free(rte *e)
{
if (rta_is_cached(e->attrs))
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static inline void
rte_free_quick(rte *e)
{
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static int /* Actually better or at least as good as */
rte_better(rte *new, rte *old)
{
@ -491,9 +512,17 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
}
}
struct rte_src *src = old ? old->attrs->src : new->attrs->src;
/* Apply export table */
if (c->out_table && !rte_update_out(c, net->n.addr, new, old, refeed))
return;
struct rte *old_exported = NULL;
if (c->out_table)
{
if (!rte_update_out(c, net->n.addr, src, new, &old_exported, refeed))
return;
}
else if (c->out_filter == FILTER_ACCEPT)
old_exported = old;
if (new)
stats->exp_updates_accepted++;
@ -523,6 +552,9 @@ do_rt_notify(struct channel *c, net *net, rte *new, rte *old, int refeed)
}
p->rt_notify(p, c, net, new, old);
if (c->out_table && old_exported)
rte_free_quick(old_exported);
}
static void
@ -875,27 +907,6 @@ rte_validate(rte *e)
return 1;
}
/**
* rte_free - delete a &rte
* @e: &rte to be deleted
*
* rte_free() deletes the given &rte from the routing table it's linked to.
*/
void
rte_free(rte *e)
{
if (rta_is_cached(e->attrs))
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static inline void
rte_free_quick(rte *e)
{
rta_free(e->attrs);
sl_free(rte_slab, e);
}
static int
rte_same(rte *x, rte *y)
{
@ -2465,17 +2476,15 @@ rt_prune_sync(rtable *t, int all)
*/
int
rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int refeed)
rte_update_out(struct channel *c, const net_addr *n, struct rte_src *src, rte *new, rte **old_exported, int refeed)
{
struct rtable *tab = c->out_table;
struct rte_src *src;
rte *old, **pos;
net *net;
if (new)
{
net = net_get(tab, n);
src = new->attrs->src;
if (!rta_is_cached(new->attrs))
new->attrs = rta_lookup(new->attrs);
@ -2483,7 +2492,6 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int re
else
{
net = net_find(tab, n);
src = old0->attrs->src;
if (!net)
goto drop_withdraw;
@ -2509,7 +2517,7 @@ rte_update_out(struct channel *c, const net_addr *n, rte *new, rte *old0, int re
/* Remove the old rte */
*pos = old->next;
rte_free_quick(old);
*old_exported = old;
tab->rt_count--;
break;