SCTP_CHUNK_FLAG_SENT
#define SCTP_CLR_SENT_FLAG(mp) ((mp)->b_flag &= ~SCTP_CHUNK_FLAG_SENT)
#define SCTP_SET_SENT_FLAG(mp) ((mp)->b_flag = SCTP_CHUNK_FLAG_SENT)
(mp)->b_flag = SCTP_CHUNK_FLAG_SENT; \
#define SCTP_CHUNK_ISSENT(mp) ((mp)->b_flag & SCTP_CHUNK_FLAG_SENT)
(((mp)->b_flag & (SCTP_CHUNK_FLAG_REXMIT|SCTP_CHUNK_FLAG_SENT)) != \
SCTP_CHUNK_FLAG_SENT))
((mp)->b_flag = (SCTP_CHUNK_FLAG_SENT|SCTP_CHUNK_FLAG_ACKED))
(((mp)->b_flag & (SCTP_CHUNK_FLAG_REXMIT|SCTP_CHUNK_FLAG_SENT)) != \
SCTP_CHUNK_FLAG_SENT)))