Function key_setsadbsa

freebsd/netipsec/key.c:3782–3808

* copy secasvar data into sadb_address. */

 * copy secasvar data into sadb_address.
 */
static struct mbuf *
key_setsadbsa(struct secasvar *sav)
{
	struct mbuf *m;
	struct sadb_sa *p;
	int len;

	len = PFKEY_ALIGN8(sizeof(struct sadb_sa));
	m = m_get2(len, M_NOWAIT, MT_DATA, 0);
	if (m == NULL)
		return (NULL);
	m_align(m, len);
	m->m_len = len;
	p = mtod(m, struct sadb_sa *);
	bzero(p, len);
	p->sadb_sa_len = PFKEY_UNIT64(len);
	p->sadb_sa_exttype = SADB_EXT_SA;
	p->sadb_sa_spi = sav->spi;
	p->sadb_sa_replay = sav->replay ?
	    (sav->replay->wsize > UINT8_MAX ? UINT8_MAX :
		sav->replay->wsize): 0;
	p->sadb_sa_state = sav->state;
	p->sadb_sa_auth = sav->alg_auth;
	p->sadb_sa_encrypt = sav->alg_enc;
	p->sadb_sa_flags = sav->flags & SADB_KEY_FLAGS_MAX;
	return (m);
}

/*
 * set data into sadb_address.