/*

  *  Copyright (C) 2002 - 2005 Tomasz Kojm <tkojm@clamav.net>

  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #ifndef __CLAMAV_H
 #define __CLAMAV_H
 
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <unistd.h>
  
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
 
 #define CL_COUNT_PRECISION 4096
 
 /* return codes */
 #define CL_CLEAN	0   /* virus not found */
 #define CL_VIRUS	1   /* virus found */

 #define CL_EMAXREC	10  /* recursion level limit exceeded */
 #define CL_EMAXSIZE	11  /* size limit exceeded */
 #define CL_EMAXFILES	12  /* files limit exceeded */
 #define CL_ERAR		100 /* rar handler error */
 #define CL_EZIP		101 /* zip handler error */
 #define	CL_EMALFZIP	102 /* malformed zip */
 #define CL_EGZIP	103 /* gzip handler error */
 #define CL_EBZIP	104 /* bzip2 handler error */

 #define CL_EOLE2	105 /* OLE2 handler error */

 #define CL_EMSCOMP	106 /* compress.exe handler error */

 #define CL_EMSCAB	107 /* MS CAB module error */

 #define CL_EACCES	200 /* access denied */
 #define CL_ENULLARG	300 /* null argument error */
 

 #define CL_ETMPFILE	-1  /* tmpfile() failed */
 #define CL_EFSYNC	-2  /* fsync() failed */
 #define CL_EMEM		-3  /* memory allocation error */
 #define CL_EOPEN	-4  /* file open error */
 #define CL_EMALFDB	-5  /* malformed database */
 #define CL_EPATSHORT	-6  /* pattern too short */
 #define CL_ETMPDIR	-7  /* mkdir() failed */
 #define CL_ECVD		-8  /* not a CVD file (or broken) */
 #define CL_ECVDEXTR	-9  /* CVD extraction failure */
 #define CL_EMD5		-10 /* MD5 verification error */
 #define CL_EDSIG	-11 /* digital signature verification error */

 #define CL_EIO		-12 /* general I/O error */

 #define CL_EFORMAT	-13 /* bad format or broken file */

 /* scan options */
 #define CL_SCAN_RAW		0
 #define CL_SCAN_ARCHIVE		1
 #define CL_SCAN_MAIL		2
 #define CL_SCAN_DISABLERAR	4
 #define CL_SCAN_OLE2		8

 #define CL_SCAN_BLOCKENCRYPTED	16

 #define CL_SCAN_HTML		32
 #define CL_SCAN_PE		64

 #define CL_SCAN_BLOCKBROKEN	128

 #define CL_SCAN_MAILURL		256
 #define CL_SCAN_BLOCKMAX	512

 /* recommended options */

 #define CL_SCAN_STDOPT		(CL_SCAN_ARCHIVE | CL_SCAN_MAIL | CL_SCAN_OLE2 | CL_SCAN_HTML | CL_SCAN_PE) 
 
 /* aliases for backward compatibility */
 #define CL_RAW		CL_SCAN_RAW
 #define CL_ARCHIVE	CL_SCAN_ARCHIVE
 #define CL_MAIL		CL_SCAN_MAIL
 #define CL_DISABLERAR	CL_SCAN_DISABLERAR
 #define CL_OLE2		CL_SCAN_OLE2

 #define CL_ENCRYPTED    CL_SCAN_BLOCKENCRYPTED

 
 struct cli_bm_patt {

     char *pattern, *virname, *offset;
     const char *viralias;
     unsigned int length;
     unsigned short target;

     struct cli_bm_patt *next;
 };
 
 struct cli_ac_patt {

     short int *pattern;

     unsigned int length, mindist, maxdist;

     char *virname, *offset;
     const char *viralias;
     unsigned short int sigid, parts, partno, alt, *altn;
     unsigned short type, target;

     char **altc;

     struct cli_ac_patt *next;

 };
 

 struct cli_ac_node {

     char islast;

     struct cli_ac_patt *list;
     struct cli_ac_node *trans[256], *fail;

 };

 struct cli_md5_node {

     char *virname, *viralias;
     unsigned char *md5;

     unsigned int size;

     unsigned short fp;

     struct cli_md5_node *next;
 };
 

 struct cli_meta_node {

     int csize, size, method;
     unsigned int crc32, fileno, encrypted, maxdepth;

     char *filename, *virname;

     struct cli_meta_node *next;

 };
 

 struct cl_node {

     unsigned int refcount;

     unsigned int maxpatlen; /* maximal length of pattern in db */
 
     /* Extended Boyer-Moore */
     int *bm_shift;
     struct cli_bm_patt **bm_suffix;
 
     /* Extended Aho-Corasick */
     struct cli_ac_node *ac_root, **ac_nodetable;
     unsigned int ac_partsigs, ac_nodes;

 
     /* MD5 */

     struct cli_md5_node **md5_hlist;

 
     /* Zip metadata */

     struct cli_meta_node *zip_mlist;
 
     /* RAR metadata */
     struct cli_meta_node *rar_mlist;
 

 };
 
 struct cl_limits {

     unsigned int maxreclevel; /* maximal recursion level */
     unsigned int maxfiles; /* maximal number of files to be
 			    * scanned within an archive
 			    */
     unsigned int maxratio; /* maximal compression ratio */
     unsigned short archivememlim; /* limit memory usage for bzip2 (0/1) */
     unsigned long int maxfilesize; /* files in an archive larger than
 				    * this limit will not be scanned
 				    */

 };
 
 struct cl_stat {
     char *dir;
     int no;
     struct stat *stattab;

     char **statdname;

 };
 

 struct cl_cvd {
     char *time;	    /* 2 */
     int version;    /* 3 */
     int sigs;	    /* 4 */
     short int fl;   /* 5 */
     char *md5;	    /* 6 */
     char *dsig;	    /* 7 */
     char *builder;  /* 8 */

     int stime;	    /* 9 */

 };
 

 /* file scanning */

 extern int cl_scanbuff(const char *buffer, unsigned int length, const char **virname, const struct cl_node *root);

 extern int cl_scandesc(int desc, const char **virname, unsigned long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options);

 extern int cl_scanfile(const char *filename, const char **virname, unsigned long int *scanned, const struct cl_node *root, const struct cl_limits *limits, unsigned int options);

 /* software versions */
 extern int cl_retflevel(void);

 extern const char *cl_retver(void);

 /* database */

 extern int cl_loaddb(const char *filename, struct cl_node **root, unsigned int *signo);
 extern int cl_loaddbdir(const char *dirname, struct cl_node **root, unsigned int *signo);

 extern const char *cl_retdbdir(void);

 extern struct cl_node *cl_dup(struct cl_node *root);

 /* CVD */

 extern struct cl_cvd *cl_cvdhead(const char *file);

 extern struct cl_cvd *cl_cvdparse(const char *head);
 extern int cl_cvdverify(const char *file);

 extern void cl_cvdfree(struct cl_cvd *cvd);
 

 /* data dir stat functions */

 extern int cl_statinidir(const char *dirname, struct cl_stat *dbstat);
 extern int cl_statchkdir(const struct cl_stat *dbstat);
 extern int cl_statfree(struct cl_stat *dbstat);
 

 /* enable debug information */
 extern void cl_debug(void);

 extern void cl_settempdir(const char *dir, short leavetemps);
 

 extern int cl_build(struct cl_node *root);
 extern void cl_free(struct cl_node *root);

 extern const char *cl_strerror(int clerror);
 extern const char *cl_perror(int clerror); /* deprecated */

 
 #ifdef __cplusplus
 };
 #endif
  
 #endif