add some macros for making request handlers and byte swapping easier:
* X_REQUEST_HEAD_STRUCT(type) and X_REQUEST_HEAD_AT_LEAST(type)
declare header struct pointers and check size
* X_REQUEST_FIELD_CARD16(field)
swaps a CARD16 (word) header field (if neccessary)
* X_REQUEST_FIELD_CARD32(field)
swaps a CARD32 (dword) header field (if neccessary)
* X_REQUEST_REST_CARD16()
swaps remaining CARD16 array payload (if necessary)
* X_REQUEST_REST_CARD32()
swaps remaining CARD32 array payload (if necessary)
* X_REQUEST_REST_COUNT_CARD16(count)
check swaps `count` CARD16 payload fields and checks size
* X_REQUEST_REST_COUNT_CARD32(count)
check swaps `count` CARD32 payload fields and checks size
How to use them:
1. put X_REQUEST_HEAD_STRUCT() or X_REQUEST_HEAD_AT_LEAST() ontop of each Proc*()
2. add X_REQUEST_FIELD_*() et al below, for all fields to be swapped and
drop the corresponding SProc*()'s
3. let the dispatchers call Proc*() instead of SProc*()
Notes:
* the length field is already swapped before request handlers called
Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
6a320e76cb