SCTP_PR_SCTP_TTL
sp->sinfo_flags |= SCTP_PR_SCTP_TTL;
#define CHUNK_FLAGS_PR_SCTP_TTL SCTP_PR_SCTP_TTL
#define PR_SCTP_TTL_ENABLED(x) (PR_SCTP_POLICY(x) == SCTP_PR_SCTP_TTL)