REKEY_TIMEOUT
ticks = REKEY_TIMEOUT * hz + REKEY_TIMEOUT_JITTER * hz / 1000;
REKEY_TIMEOUT, peer->p_handshake_retries + 1);
#define MAX_TIMER_HANDSHAKES (90 / REKEY_TIMEOUT)
#define NEW_HANDSHAKE_TIMEOUT (REKEY_TIMEOUT + KEEPALIVE_TIMEOUT)
if (!timer_expired(&r->r_last_sent, REKEY_TIMEOUT, 0))
expired = timer_expired(&r->r_last_sent, REKEY_TIMEOUT, 0);
KEEPALIVE_TIMEOUT - REKEY_TIMEOUT, 0));