OpenSL                                             bio(3openssl)



NAME
     bio - I/O abstraction

SYNOPSIS
      #include 

     TBA

DESCRIPTION
     A BIO is an I/O abstraction, it hides many of the underlying
     I/O details from an application. If an application uses a
     BIO for its I/O it can transparently handle SL connections,
     unencrypted network connections and file I/O.

     There are two type of BIO, a source/sink BIO and a filter
     BIO.

     As its name implies a source/sink BIO is a source and/or
     sink of data, examples include a socket BIO and a file BIO.

     A filter BIO takes data from one BIO and passes it through
     to another, or the application. The data may be left
     unmodified (for example a message digest BIO) or translated
     (for example an encryption BIO). The effect of a filter BIO
     may change according to the I/O operation it is performing:
     for example an encryption BIO will encrypt data if it is
     being written to and decrypt data if it is being read from.

     BIOs can be joined together to form a chain (a single BIO is
     a chain with one component). A chain normally consist of one
     source/sink BIO and one or more filter BIOs. Data read from
     or written to the first BIO then traverses the chain to the
     end (normally a source/sink BIO).

SEE ALSO
     BIOctrl(3), BIOfbase64(3), BIOfbuffer(3),
     BIOfcipher(3), BIOfmd(3), BIOfnull(3), BIOfssl(3),
     BIOfindtype(3), BIOnew(3), BIOnewbiopair(3),
     BIOpush(3), BIOread(3), BIOsaccept(3), BIOsbio(3),
     BIOsconnect(3), BIOsfd(3), BIOsfile(3), BIOsmem(3),
     BIOsnull(3), BIOssocket(3), BIOsetcallback(3),
     BIOshouldretry(3)













OpenSL-0.9.8       Last change: Oct 11 2005                    1