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Trigger soft lifetime expiration on sequence number

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This patch adds 80% of UINT32_MAX limit on sequence number.
When sequence number reaches limit kernel sends SADB_EXPIRE message to
IKE daemon which is responsible to perform rekeying.

Submitted by:           Patryk Duda <pdk@semihalf.com>
Reviewed by:            ae
Differential revision:  https://reviews.freebsd.org/D22370
Obtained from:          Semihalf
Sponsored by:           Stormshield
This commit is contained in:
Marcin Wojtas 2020-10-16 11:27:01 +00:00
parent 4d36d1fd59
commit ac152c14e0
1 changed files with 6 additions and 1 deletions
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7
sys/netipsec/key.c
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@ -101,6 +101,7 @@
#define FULLMASK 0xff
#define _BITS(bytes) ((bytes) << 3)
#define UINT32_80PCT 0xcccccccc
/*
* Note on SA reference counting:
* - SAs that are not in DEAD state will have (total external reference + 1)
@ -4536,7 +4537,11 @@ key_flush_sad(time_t now)
(sav->lft_s->usetime != 0 && sav->firstused &&
now - sav->firstused > sav->lft_s->usetime) ||
(sav->lft_s->bytes != 0 && counter_u64_fetch(
sav->lft_c_bytes) > sav->lft_s->bytes))) {
sav->lft_c_bytes) > sav->lft_s->bytes) ||
(!(sav->flags & SADB_X_SAFLAGS_ESN) &&
(sav->replay != NULL) && (
(sav->replay->count > UINT32_80PCT) ||
(sav->replay->last > UINT32_80PCT))))) {
SECASVAR_UNLOCK(sav);
SAV_ADDREF(sav);
LIST_INSERT_HEAD(&sexpireq, sav, drainq);