SrvTypeRqst: Add bounds checking on buffer parsing

There are multiple length fields provided by the user in this command.
Need to ensure those lengths do not exceed the input buffer size.

Tested:
- Executed new unit tests successfully

Change-Id: Id42c8c2f7f87cab07982edabe93f09cd9ef4208a
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
2 files changed