刚刚接触W代码，txt的sms是通过+csmp设置的呢？那PDU格式的怎么设置呢？有人知道麻烦说说。是有at设置还是需要修改代码？

PDU sms：
/* TP-MTI, TP-MMS, TP-SRI, TP_UDHI, TP-RP:
*/
data[pos] = 0x00; /* DELIVER: bits 0, 1 */
data[pos] |= deliver->more ? 0 : 0x04; /* bit 2 */
/* bits 3, 4 are not used */
data[pos] |= deliver->status_report_enabled ? 0x20 : 0; /* bit 5 */
data[pos] |= deliver->user_data_header_present ? 0x40 : 0; /* bit 6 */
data[pos] |= deliver->reply_path_present ? 0x80 : 0; /* bit 7 */
pos ++;

txt sms：
/* TP-MTI, TP-RD, TP-VPF, TP-SRR, TP_UDHI, TP-RP:
*/
data[pos] = 0x01; /* SUBMIT: bits 0, 1 */
data[pos] |= submit->reject_duplicates ? 0x04 : 0; /* bit 2 */
if (submit->validity.format > 3 )
{
return st = WMS_INVALID_VALIDITY_FORMAT_S;
}
data[pos] |= submit->validity.format << 3; /* bits 3, 4 */
data[pos] |= submit->status_report_enabled ? 0x20 : 0; /* bit 5 */
data[pos] |= submit->user_data_header_present ? 0x40 : 0; /* bit 6 */
data[pos] |= submit->reply_path_present ? 0x80 : 0; /* bit 7 */
pos ++;

从上面这个两段代码可以看出设置短信有效期应该是：
PDU sms：
/* bits 3, 4 are not used */

TXTsms：
if (submit->validity.format > 3 )
{
return st = WMS_INVALID_VALIDITY_FORMAT_S;
}
data[pos] |= submit->validity.format << 3; /* bits 3, 4 */

奇怪的是PDU不能设置短信有效期吗？疑惑中……期待高人解答。十分感谢！