/*

* ModSecurity for Apache 2.x, http://www.modsecurity.org/

* Copyright (c) 2004-2013 Trustwave Holdings, Inc. (http://www.trustwave.com/)

*

* You may not use this file except in compliance with

* the License.  You may obtain a copy of the License at

*

*     http://www.apache.org/licenses/LICENSE-2.0

*

* If any of the files related to licensing are missing or if you have any

* other questions related to licensing please contact Trustwave Holdings, Inc.

* directly using the email address security@modsecurity.org.

*/

#ifndef _ALP2_LL_H_

#define _ALP2_LL_H_

#include <apr_general.h>

#include <apr_md5.h>

#include <apr_strings.h>

#include <apr_tables.h>

#include <apr_md5.h>

/* -- Constants -- */

#define ALP2_MAX_LINE_SIZE 16384

#define ALP2_ERROR_INCORRECT_STATE  -1001

#define ALP2_ERROR_FATAL            -1002

#define ALP2_DONE       0

#define ALP2_NEED_DATA  1

#define ALP2_EVENT_ENTRY_START          1

#define ALP2_EVENT_ENTRY_END            2

#define ALP2_EVENT_PART_START           3

#define ALP2_EVENT_PART_END             4

#define ALP2_EVENT_PART_DATA            5

/* -- Data structures -- */

typedef struct alp2_pp_part_t alp2_pp_part_t;

struct alp2_pp_part_t {

    int id; // XXX int here but unsigned int other places???

    /* Relative to the beginning of the entry, not

     * including the boundary lines. Just content.

     */

    size_t offset;

    size_t size;

};

typedef struct alp2_pp_entry_t alp2_pp_entry_t;

struct alp2_pp_entry_t {

    apr_pool_t *mp;

    apr_array_header_t *parts;

    /* Entry offset and size include 

     * the delimiting boundaries. 

     */

    size_t offset;

    size_t size;

    const char *boundary;

    apr_md5_ctx_t *md5_context;

    uint8_t md5_digest[APR_MD5_DIGESTSIZE];

};

typedef struct alp2_pp_t alp2_pp_t;

struct alp2_pp_t {

    void *user_data;

    int (*callback)(alp2_pp_t *alp, int event_type);

    /* The memory pool used during the parsing of

     * individual audit log entries. Cleared between

     * entries.

     */

    apr_pool_t *mp;

    unsigned int errored;

    unsigned int done;

    const char *boundary;

    char *last_processed_part;

    char *current_line;

    /* The number of bytes processed since

     * the beginning or the last reset.

     */

    size_t current_offset;

    const char *input_buf;

    size_t input_len;

    size_t input_pos;

    char *line_buf;

    size_t line_pos;

    size_t line_size;

    unsigned int line_has_start;

    size_t line_offset;

    alp2_pp_part_t *current_part;

    alp2_pp_entry_t *current_entry;

};

/* Functions. */

int alp2_pp_init(alp2_pp_t *alp_pp, void *user_data,

    int (*callback)(alp2_pp_t *alp, int event_type), apr_pool_t *mp);

int alp2_pp_process(alp2_pp_t *alp_pp, const char *data, size_t len);

void alp2_pp_terminate(alp2_pp_t *alp_pp);

char *alp2_pp_line_chomp(alp2_pp_t *alp_pp);

#endif