PACKET_TAG_PF
if ((mtag = m_tag_find(m, PACKET_TAG_PF)) == NULL)
if ((mtag = m_tag_find(m, PACKET_TAG_PF)) == NULL) {
mtag = m_tag_get(PACKET_TAG_PF, sizeof(struct pf_mtag),
mtag = m_tag_find(n, PACKET_TAG_PF);