Function sctp_generate_cause

freebsd/netinet/sctputil.c:4926–4951

 */

struct mbuf *
sctp_generate_cause(uint16_t code, char *info)
{
	struct mbuf *m;
	struct sctp_gen_error_cause *cause;
	size_t info_len;
	uint16_t len;

	if ((code == 0) || (info == NULL)) {
		return (NULL);
	}
	info_len = strlen(info);
	if (info_len > (SCTP_MAX_CAUSE_LENGTH - sizeof(struct sctp_paramhdr))) {
		return (NULL);
	}
	len = (uint16_t)(sizeof(struct sctp_paramhdr) + info_len);
	m = sctp_get_mbuf_for_msg(len, 0, M_NOWAIT, 1, MT_DATA);
	if (m != NULL) {
		SCTP_BUF_LEN(m) = len;
		cause = mtod(m, struct sctp_gen_error_cause *);
		cause->code = htons(code);
		cause->length = htons(len);
		memcpy(cause->info, info, info_len);
	}
	return (m);
}

struct mbuf *
sctp_generate_no_user_data_cause(uint32_t tsn)