CoreServices.framework missing in iOS 4 sdk

I wanted to use CFHttpMessage and CFHttpRequest types in my application. I used it and found from documentation that to use it I will have to include CoreServices.framework in my application. When I tried to add that framework to my application, it was no there in the list of framework. I also checked the frameworks directory in finder but its not there. So its problem in the iOS sdk. I am not able to use the CFHttpMessage and CFHttpRequest types in my application, because it can not find the framework thats why it gives the linking er开发者_开发百科ror. At installation time of iOS sdk I chosen all the options and made full installation. So from where can I bring the CoreServices.framework in my application.

It doesn' exist: http://markmail.org/message/ib7kdwfpvoovomng