sctp_paddrinfo
((struct sctp_paddrinfo *)arg)->spinfo_assoc_id = id;
struct sctp_paddrinfo sp;
struct sctp_paddrinfo sstat_primary;
struct sctp_paddrinfo *paddri;
SCTP_CHECK_AND_CAST(paddri, optval, struct sctp_paddrinfo, *optsize);
*optsize = sizeof(struct sctp_paddrinfo);
memset(&sstat->sstat_primary, 0, sizeof(struct sctp_paddrinfo));