=head1 NAME
- BIO_set_callback, BIO_get_callback - BIO callback
+BIO_set_callback, BIO_get_callback, BIO_set_callback_arg, BIO_get_callback_arg,
+BIO_debug_callback - BIO callback functions
=head1 SYNOPSIS
long BIO_debug_callback(BIO *bio,int cmd,const char *argp,int argi,
long argl,long ret);
- typedef long callback(BIO *b, int oper, const char *argp,
+ typedef long (*callback)(BIO *b, int oper, const char *argp,
int argi, long argl, long retvalue);
=head1 DESCRIPTION