rdr_snd_msg
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, param, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &req_hdr, &req_data, DCS_SND_TIMEOUT);
snd_status = rdr_snd_msg(sp->fd, &req_hdr, (cfga_params_t *)&req_data,
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, &reply_param,
snd_status = rdr_snd_msg(sp->fd, &reply_hdr, &reply_param,
snd_status = rdr_snd_msg(sp->fd, &req_hdr, &req_data, DCS_SND_TIMEOUT);
(void) rdr_snd_msg(sp->fd, &op_hdr, &op_data, DCS_SND_TIMEOUT);
int rdr_snd_msg(int fd, rdr_msg_hdr_t *hdr, cfga_params_t *param, int timeout);