SCTP Programmer's Guide

sinfo Specifies a pointer to an sctp_sndrcvinfo structure used for a
sendmsg() call.
flags
Contains flags in the same format as the sendmsg() call flags (for example,
MSG_DONTROUTE)
This API can also be used to terminate an association using an association ID, by setting
the sinfo.sinfo_flags to MSG_EOF, and the sinfo.sinf_associd to the
association that must be terminated. In such a case, the length of the message is 0 (zero).
SCTP-Specific Socket APIs 67