idm_sorecv
if (idm_sorecv(so, &tmp_pdu_hdr, ISNSP_HEADER_SIZE) != 0 ||
if (idm_sorecv(so, payload, payload_len) != 0) {
rc = idm_sorecv(so_conn->ic_so, pdu->isp_hdr, sizeof (iscsi_hdr_t));
int idm_sorecv(ksocket_t so, void *msg, size_t len);