sctp_paddr_change
struct sctp_paddr_change sn_paddr_change;
struct sctp_paddr_change *spc;
m_notify = sctp_get_mbuf_for_msg(sizeof(struct sctp_paddr_change), 0, M_NOWAIT, 1, MT_DATA);
spc = mtod(m_notify, struct sctp_paddr_change *);
memset(spc, 0, sizeof(struct sctp_paddr_change));
spc->spc_length = sizeof(struct sctp_paddr_change);
SCTP_BUF_LEN(m_notify) = sizeof(struct sctp_paddr_change);