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/*
* Internal data types, definitions, and prototypes for the WebAuth library.
*
* Written by Russ Allbery <rra@stanford.edu>
* Copyright 2011
* The Board of Trustees of the Leland Stanford Junior University
*
* See LICENSE for licensing terms.
*/
#ifndef LIB_INTERNAL_H
#define LIB_INTERNAL_H 1
#include <portable/macros.h>
#include <portable/stdbool.h>
#include <apr_xml.h>
/*
* The internal context struct, which holds any state information required for
* general WebAuth library interfaces.
*/
struct webauth_context {
apr_pool_t *pool; /* Pool used for all memory allocations. */
const char *error; /* Error message from last failure. */
int code; /* Error code from last failure. */
/* The below are used only for the WebKDC functions. */
/* Configuration for contacting the user metadata service. */
struct webauth_user_config *user;
};
/*
* An APR-managed buffer, used to accumulate data that comes in chunks. This
* is managed by the webauth_buffer_* functions.
*/
struct buffer {
apr_pool_t *pool;
size_t size;
size_t used;
char *data;
};
BEGIN_DECLS
/* Default to a hidden visibility for all internal functions. */
#pragma GCC visibility push(hidden)
/* Allocate a new buffer and initialize its contents. */
struct buffer *webauth_buffer_new(apr_pool_t *)
__attribute__((__nonnull__));
/* Set the buffer contents, ignoring anything currently there. */
void webauth_buffer_set(struct buffer *, const char *data, size_t length)
__attribute__((__nonnull__));
/* Append data to the buffer. */
void webauth_buffer_append(struct buffer *, const char *data, size_t length)
__attribute__((__nonnull__));
/*
* Find a given string in the buffer. Returns the offset of the string (with
* the same meaning as start) in offset if found, and returns true if the
* terminator is found and false otherwise.
*/
bool webauth_buffer_find_string(struct buffer *, const char *, size_t start,
size_t *offset)
__attribute__((__nonnull__));
/* Set the internal WebAuth error message and error code. */
void webauth_error_set(struct webauth_context *, int err, const char *, ...)
__attribute__((__nonnull__, __format__(printf, 3, 4)));
/* Retrieve all of the text inside an XML element and return it. */
int webauth_xml_content(struct webauth_context *, apr_xml_elem *,
const char **)
__attribute__((__nonnull__));
/* Undo default visibility change. */
#pragma GCC visibility pop
END_DECLS
#endif /* !LIB_INTERNAL_H */
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