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BGP: Cleanup channels when going down

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When going up, uncleaned old channel state may trigger unexpected
conditions crashing bird.
This commit is contained in:
Ondrej Zajicek (work) 2019-01-26 19:48:16 +01:00
parent 5a50a98980
commit b8a3608aa5
2 changed files with 10 additions and 3 deletions
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5
proto/bgp/bgp.c
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@ -1692,6 +1692,11 @@ bgp_channel_cleanup(struct channel *C)
if (c->igp_table_ip6)
rt_unlock_table(c->igp_table_ip6);
c->index = 0;
/* Cleanup rest of bgp_channel starting at pool field */
memset(&(c->pool), 0, sizeof(struct bgp_channel) - OFFSETOF(struct bgp_channel, pool));
}
static inline struct bgp_channel_config *

8
proto/bgp/bgp.h
View file

@ -299,12 +299,16 @@ struct bgp_channel {
/* Rest are BGP specific data */
struct bgp_channel_config *cf;
pool *pool; /* XXXX */
u32 afi;
u32 index;
const struct bgp_af_desc *desc;
rtable *igp_table_ip4; /* Table for recursive IPv4 next hop lookups */
rtable *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
/* Rest are zeroed when down */
pool *pool;
HASH(struct bgp_bucket) bucket_hash; /* Hash table of route buckets */
struct bgp_bucket *withdraw_bucket; /* Withdrawn routes */
list bucket_queue; /* Queue of buckets to send (struct bgp_bucket) */
@ -312,8 +316,6 @@ struct bgp_channel {
HASH(struct bgp_prefix) prefix_hash; /* Prefixes to be sent */
slab *prefix_slab; /* Slab holding prefix nodes */
rtable *igp_table_ip4; /* Table for recursive IPv4 next hop lookups */
rtable *igp_table_ip6; /* Table for recursive IPv6 next hop lookups */
ip_addr next_hop_addr; /* Local address for NEXT_HOP attribute */
ip_addr link_addr; /* Link-local version of next_hop_addr */