Function key_setsadbaddr

freebsd/netipsec/key.c:3813–3854

* set data into sadb_address. */

 * set data into sadb_address.
 */
static struct mbuf *
key_setsadbaddr(u_int16_t exttype, const struct sockaddr *saddr,
    u_int8_t prefixlen, u_int16_t ul_proto)
{
	struct mbuf *m;
	struct sadb_address *p;
	size_t len;

	len = PFKEY_ALIGN8(sizeof(struct sadb_address)) +
	    PFKEY_ALIGN8(saddr->sa_len);
	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_address *);

	bzero(p, len);
	p->sadb_address_len = PFKEY_UNIT64(len);
	p->sadb_address_exttype = exttype;
	p->sadb_address_proto = ul_proto;
	if (prefixlen == FULLMASK) {
		switch (saddr->sa_family) {
		case AF_INET:
			prefixlen = sizeof(struct in_addr) << 3;
			break;
		case AF_INET6:
			prefixlen = sizeof(struct in6_addr) << 3;
			break;
		default:
			; /*XXX*/
		}
	}
	p->sadb_address_prefixlen = prefixlen;
	p->sadb_address_reserved = 0;

	bcopy(saddr,
	    mtod(m, caddr_t) + PFKEY_ALIGN8(sizeof(struct sadb_address)),
	    saddr->sa_len);

	return m;
}

/*
 * set data into sadb_x_sa2.