SCTP_EXT_COUNT
pr_supported->ph.param_length = htons(sizeof(*pr_supported) + SCTP_EXT_COUNT);
m->m_len += (sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
pr_supported->ph.param_length = htons(sizeof(*pr_supported) + SCTP_EXT_COUNT);
m->m_len += (sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);
sizeof(*pr_supported) + SCTP_EXT_COUNT + SCTP_PAD_EXT_COUNT);