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bgpd: Set AS4 capability received flag only if parsed correctly

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If we receive a malformed packet, we might end-up with a bad state.

Signed-off-by: Donatas Abraitis <donatas@opensourcerouting.org>
This commit is contained in:
Donatas Abraitis 2024-01-16 14:35:10 +02:00
parent 49cacc3184
commit b571176aea
1 changed files with 2 additions and 2 deletions
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4
bgpd/bgp_open.c
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@ -622,8 +622,6 @@ static int bgp_capability_llgr(struct peer *peer,
/* Unlike other capability parsing routines, this one returns 0 on error */
static as_t bgp_capability_as4(struct peer *peer, struct capability_header *hdr)
{
SET_FLAG(peer->cap, PEER_CAP_AS4_RCV);
if (hdr->length != CAPABILITY_CODE_AS4_LEN) {
flog_err(EC_BGP_PKT_OPEN,
"%s AS4 capability has incorrect data length %d",
@ -633,6 +631,8 @@ static as_t bgp_capability_as4(struct peer *peer, struct capability_header *hdr)
as_t as4 = stream_getl(BGP_INPUT(peer));
SET_FLAG(peer->cap, PEER_CAP_AS4_RCV);
if (BGP_DEBUG(as4, AS4))
zlog_debug(
"%s [AS4] about to set cap PEER_CAP_AS4_RCV, got as4 %u",