sctp_msg_append
error = sctp_msg_append(stcb, net, top, &srcv, flags);
ret = sctp_msg_append(stcb, stcb->asoc.primary_destination, m, &ca->sndrcv, 0);
sctp_msg_append(stcb, net, m, &srcv, flags);
if ((error = sctp_msg_append(stcb, net, m, &srcv, flags))) {