Function key_spdexpire

freebsd/netipsec/key.c:2727–2828

* SADB_SPDEXPIRE processing * send * * to KMD by PF_KEY. * * OUT: 0 : succeed * others : error number */

 *	others	: error number
 */
static int
key_spdexpire(struct secpolicy *sp)
{
	struct sadb_lifetime *lt;
	struct mbuf *result = NULL, *m;
	int len, error = -1;

	IPSEC_ASSERT(sp != NULL, ("null secpolicy"));

	KEYDBG(KEY_STAMP,
	    printf("%s: SP(%p)\n", __func__, sp));
	KEYDBG(KEY_DATA, kdebug_secpolicy(sp));

	/* set msg header */
	m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
	if (!m) {
		error = ENOBUFS;
		goto fail;
	}
	result = m;

	/* create lifetime extension (current and hard) */
	len = PFKEY_ALIGN8(sizeof(*lt)) * 2;
	m = m_get2(len, M_NOWAIT, MT_DATA, 0);
	if (m == NULL) {
		error = ENOBUFS;
		goto fail;
	}
	m_align(m, len);
	m->m_len = len;
	bzero(mtod(m, caddr_t), len);
	lt = mtod(m, struct sadb_lifetime *);
	lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
	lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_CURRENT;
	lt->sadb_lifetime_allocations = 0;
	lt->sadb_lifetime_bytes = 0;
	lt->sadb_lifetime_addtime = sp->created;
	lt->sadb_lifetime_usetime = sp->lastused;
	lt = (struct sadb_lifetime *)(mtod(m, caddr_t) + len / 2);
	lt->sadb_lifetime_len = PFKEY_UNIT64(sizeof(struct sadb_lifetime));
	lt->sadb_lifetime_exttype = SADB_EXT_LIFETIME_HARD;
	lt->sadb_lifetime_allocations = 0;
	lt->sadb_lifetime_bytes = 0;
	lt->sadb_lifetime_addtime = sp->lifetime;
	lt->sadb_lifetime_usetime = sp->validtime;
	m_cat(result, m);

	/* set sadb_address for source */
	m = key_setsadbaddr(SADB_EXT_ADDRESS_SRC,
	    &sp->spidx.src.sa,
	    sp->spidx.prefs, sp->spidx.ul_proto);
	if (!m) {
		error = ENOBUFS;
		goto fail;
	}
	m_cat(result, m);

	/* set sadb_address for destination */