ticket renew

[Xu, Qiang (FXSGSC)]

Hi, all: 

I have done a kerberos authentication successfully, and get a TGT. And I also can use the TGT to do SASL binding in LDAP query now. 

The ticket looks like: 
===========================================
MBC107:/var/log/nc <135> /tmp/dlms/kerberos/apps/klist   
Ticket cache: FILE:/tmp/krb5cc_0
Default principal: xuan at SESSWIN2003.COM

Valid starting     Expires            Service principal
04/23/09 15:14:53  04/24/09 01:13:50  krbtgt/SESSWIN2003.COM at SESSWIN2003.COM
        renew until 04/24/09 15:14:53
04/23/09 15:13:50  04/24/09 01:13:50  ldap/sesswin2003.sesswin2003.com at SESSWIN2003.COM
        renew until 04/24/09 15:14:53
===========================================
It said the ticket is renewable until somewhen. But how to do it in code? Is there any function to use, to renew the ticket?

Looking forward to help,
Xu Qiang