/* Copyright (c) 2004-2007, Sara Golemon <sarag@libssh2.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms,
 * with or without modification, are permitted provided
 * that the following conditions are met:
 *
 *   Redistributions of source code must retain the above
 *   copyright notice, this list of conditions and the
 *   following disclaimer.
 *
 *   Redistributions in binary form must reproduce the above
 *   copyright notice, this list of conditions and the following
 *   disclaimer in the documentation and/or other materials
 *   provided with the distribution.
 *
 *   Neither the name of the copyright holder nor the names
 *   of any other contributors may be used to endorse or
 *   promote products derived from this software without
 *   specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

#ifndef LIBSSH2_SFTP_H
#define LIBSSH2_SFTP_H 1

#ifndef WIN32
#include <unistd.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

/* Note: Version 6 was documented at the time of writing
 * However it was marked as "DO NOT IMPLEMENT" due to pending changes
 *
 * Let's start with Version 3 (The version found in OpenSSH) and go from there
 */
#define LIBSSH2_SFTP_VERSION        3
#define LIBSSH2_SFTP_PACKET_MAXLEN  40000

typedef struct _LIBSSH2_SFTP                LIBSSH2_SFTP;
typedef struct _LIBSSH2_SFTP_HANDLE         LIBSSH2_SFTP_HANDLE;
typedef struct _LIBSSH2_SFTP_ATTRIBUTES     LIBSSH2_SFTP_ATTRIBUTES;

/* Flags for open_ex() */
#define LIBSSH2_SFTP_OPENFILE           0
#define LIBSSH2_SFTP_OPENDIR            1

/* Flags for rename_ex() */
#define LIBSSH2_SFTP_RENAME_OVERWRITE   0x00000001
#define LIBSSH2_SFTP_RENAME_ATOMIC      0x00000002
#define LIBSSH2_SFTP_RENAME_NATIVE      0x00000004

/* Flags for stat_ex() */
#define LIBSSH2_SFTP_STAT               0
#define LIBSSH2_SFTP_LSTAT              1
#define LIBSSH2_SFTP_SETSTAT            2

/* Flags for symlink_ex() */
#define LIBSSH2_SFTP_SYMLINK            0
#define LIBSSH2_SFTP_READLINK           1
#define LIBSSH2_SFTP_REALPATH           2

/* SFTP attribute flag bits */
#define LIBSSH2_SFTP_ATTR_SIZE              0x00000001
#define LIBSSH2_SFTP_ATTR_UIDGID            0x00000002
#define LIBSSH2_SFTP_ATTR_PERMISSIONS       0x00000004
#define LIBSSH2_SFTP_ATTR_ACMODTIME         0x00000008
#define LIBSSH2_SFTP_ATTR_EXTENDED          0x80000000

struct _LIBSSH2_SFTP_ATTRIBUTES {
    /* If flags & ATTR_* bit is set, then the value in this struct will be meaningful
     * Otherwise it should be ignored
     */
    unsigned long flags;

    libssh2_uint64_t filesize;
    unsigned long uid, gid;
    unsigned long permissions;
    unsigned long atime, mtime;
};

/* SFTP filetypes */
#define LIBSSH2_SFTP_TYPE_REGULAR           1
#define LIBSSH2_SFTP_TYPE_DIRECTORY         2
#define LIBSSH2_SFTP_TYPE_SYMLINK           3
#define LIBSSH2_SFTP_TYPE_SPECIAL           4
#define LIBSSH2_SFTP_TYPE_UNKNOWN           5
#define LIBSSH2_SFTP_TYPE_SOCKET            6
#define LIBSSH2_SFTP_TYPE_CHAR_DEVICE       7
#define LIBSSH2_SFTP_TYPE_BLOCK_DEVICE      8
#define LIBSSH2_SFTP_TYPE_FIFO              9

/*
 * Reproduce the POSIX file modes here for systems that are not
 * POSIX compliant.  
 *
 * These is used in "permissions" of "struct _LIBSSH2_SFTP_ATTRIBUTES"
 */
/* File type */
#define LIBSSH2_SFTP_S_IFMT         0170000     /* type of file mask */
#define LIBSSH2_SFTP_S_IFIFO        0010000     /* named pipe (fifo) */
#define LIBSSH2_SFTP_S_IFCHR        0020000     /* character special */
#define LIBSSH2_SFTP_S_IFDIR        0040000     /* directory */
#define LIBSSH2_SFTP_S_IFBLK        0060000     /* block special */
#define LIBSSH2_SFTP_S_IFREG        0100000     /* regular */
#define LIBSSH2_SFTP_S_IFLNK        0120000     /* symbolic link */
#define LIBSSH2_SFTP_S_IFSOCK       0140000     /* socket */

/* File mode */
/* Read, write, execute/search by owner */
#define LIBSSH2_SFTP_S_IRWXU        0000700     /* RWX mask for owner */
#define LIBSSH2_SFTP_S_IRUSR        0000400     /* R for owner */
#define LIBSSH2_SFTP_S_IWUSR        0000200     /* W for owner */
#define LIBSSH2_SFTP_S_IXUSR        0000100     /* X for owner */
/* Read, write, execute/search by group */
#define LIBSSH2_SFTP_S_IRWXG        0000070     /* RWX mask for group */
#define LIBSSH2_SFTP_S_IRGRP        0000040     /* R for group */
#define LIBSSH2_SFTP_S_IWGRP        0000020     /* W for group */
#define LIBSSH2_SFTP_S_IXGRP        0000010     /* X for group */
/* Read, write, execute/search by others */
#define LIBSSH2_SFTP_S_IRWXO        0000007     /* RWX mask for other */
#define LIBSSH2_SFTP_S_IROTH        0000004     /* R for other */
#define LIBSSH2_SFTP_S_IWOTH        0000002     /* W for other */
#define LIBSSH2_SFTP_S_IXOTH        0000001     /* X for other */

/* SFTP File Transfer Flags -- (e.g. flags parameter to sftp_open())
 * Danger will robinson... APPEND doesn't have any effect on OpenSSH servers */
#define LIBSSH2_FXF_READ                        0x00000001
#define LIBSSH2_FXF_WRITE                       0x00000002
#define LIBSSH2_FXF_APPEND                      0x00000004
#define LIBSSH2_FXF_CREAT                       0x00000008
#define LIBSSH2_FXF_TRUNC                       0x00000010
#define LIBSSH2_FXF_EXCL                        0x00000020

/* SFTP Status Codes (returned by libssh2_sftp_last_error() ) */
#define LIBSSH2_FX_OK                       0
#define LIBSSH2_FX_EOF                      1
#define LIBSSH2_FX_NO_SUCH_FILE             2
#define LIBSSH2_FX_PERMISSION_DENIED        3
#define LIBSSH2_FX_FAILURE                  4
#define LIBSSH2_FX_BAD_MESSAGE              5
#define LIBSSH2_FX_NO_CONNECTION            6
#define LIBSSH2_FX_CONNECTION_LOST          7
#define LIBSSH2_FX_OP_UNSUPPORTED           8
#define LIBSSH2_FX_INVALID_HANDLE           9
#define LIBSSH2_FX_NO_SUCH_PATH             10
#define LIBSSH2_FX_FILE_ALREADY_EXISTS      11
#define LIBSSH2_FX_WRITE_PROTECT            12
#define LIBSSH2_FX_NO_MEDIA                 13
#define LIBSSH2_FX_NO_SPACE_ON_FILESYSTEM   14
#define LIBSSH2_FX_QUOTA_EXCEEDED           15
#define LIBSSH2_FX_UNKNOWN_PRINCIPLE        16 /* Initial mis-spelling */
#define LIBSSH2_FX_UNKNOWN_PRINCIPAL        16
#define LIBSSH2_FX_LOCK_CONFlICT            17 /* Initial mis-spelling */
#define LIBSSH2_FX_LOCK_CONFLICT            17
#define LIBSSH2_FX_DIR_NOT_EMPTY            18
#define LIBSSH2_FX_NOT_A_DIRECTORY          19
#define LIBSSH2_FX_INVALID_FILENAME         20
#define LIBSSH2_FX_LINK_LOOP                21

/* Returned by any function that would block during a read/write opperation */
#define LIBSSH2SFTP_EAGAIN LIBSSH2_ERROR_EAGAIN

/* SFTP API */
LIBSSH2_API LIBSSH2_SFTP *libssh2_sftp_init(LIBSSH2_SESSION *session);
LIBSSH2_API int libssh2_sftp_shutdown(LIBSSH2_SFTP *sftp);
LIBSSH2_API unsigned long libssh2_sftp_last_error(LIBSSH2_SFTP *sftp);

/* File / Directory Ops */
LIBSSH2_API LIBSSH2_SFTP_HANDLE *libssh2_sftp_open_ex(LIBSSH2_SFTP *sftp, const char *filename, unsigned int filename_len,
                                                      unsigned long flags, long mode, int open_type);
#define libssh2_sftp_open(sftp, filename, flags, mode) \
                    libssh2_sftp_open_ex((sftp), (filename), strlen(filename), (flags), (mode), LIBSSH2_SFTP_OPENFILE)
#define libssh2_sftp_opendir(sftp, path) \
                    libssh2_sftp_open_ex((sftp), (path), strlen(path), 0, 0, LIBSSH2_SFTP_OPENDIR)

LIBSSH2_API ssize_t libssh2_sftp_read(LIBSSH2_SFTP_HANDLE *handle, char *buffer, size_t buffer_maxlen);

LIBSSH2_API int libssh2_sftp_readdir_ex(LIBSSH2_SFTP_HANDLE *handle, char *buffer, size_t buffer_maxlen, 
                                        char *longentry, size_t longentry_maxlen, 
                                        LIBSSH2_SFTP_ATTRIBUTES *attrs);
#define libssh2_sftp_readdir(handle, buffer, buffer_maxlen, attrs) \
                    libssh2_sftp_readdir_ex((handle), (buffer), (buffer_maxlen), NULL, 0, (attrs))

LIBSSH2_API ssize_t libssh2_sftp_write(LIBSSH2_SFTP_HANDLE *handle, const char *buffer, size_t count);

LIBSSH2_API int libssh2_sftp_close_handle(LIBSSH2_SFTP_HANDLE *handle);
#define libssh2_sftp_close(handle)                  libssh2_sftp_close_handle(handle)
#define libssh2_sftp_closedir(handle)               libssh2_sftp_close_handle(handle)

LIBSSH2_API void libssh2_sftp_seek(LIBSSH2_SFTP_HANDLE *handle, size_t offset);
#define libssh2_sftp_rewind(handle)         libssh2_sftp_seek((handle), 0)

LIBSSH2_API size_t libssh2_sftp_tell(LIBSSH2_SFTP_HANDLE *handle);

LIBSSH2_API int libssh2_sftp_fstat_ex(LIBSSH2_SFTP_HANDLE *handle, LIBSSH2_SFTP_ATTRIBUTES *attrs, int setstat);
#define libssh2_sftp_fstat(handle, attrs)               libssh2_sftp_fstat_ex((handle), (attrs), 0)
#define libssh2_sftp_fsetstat(handle, attrs)            libssh2_sftp_fstat_ex((handle), (attrs), 1)



/* Miscellaneous Ops */
LIBSSH2_API int libssh2_sftp_rename_ex(LIBSSH2_SFTP *sftp,  const char *source_filename,    unsigned int srouce_filename_len,
                                                            const char *dest_filename,      unsigned int dest_filename_len,
                                                            long flags);
#define libssh2_sftp_rename(sftp, sourcefile, destfile)     libssh2_sftp_rename_ex((sftp), (sourcefile), strlen(sourcefile), (destfile), strlen(destfile), \
                                                            LIBSSH2_SFTP_RENAME_OVERWRITE | LIBSSH2_SFTP_RENAME_ATOMIC | LIBSSH2_SFTP_RENAME_NATIVE)

LIBSSH2_API int libssh2_sftp_unlink_ex(LIBSSH2_SFTP *sftp, const char *filename, unsigned int filename_len);
#define libssh2_sftp_unlink(sftp, filename)                 libssh2_sftp_unlink_ex((sftp), (filename), strlen(filename))

LIBSSH2_API int libssh2_sftp_mkdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len, long mode);
#define libssh2_sftp_mkdir(sftp, path, mode)                libssh2_sftp_mkdir_ex((sftp), (path), strlen(path), (mode))

LIBSSH2_API int libssh2_sftp_rmdir_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len);
#define libssh2_sftp_rmdir(sftp, path)                      libssh2_sftp_rmdir_ex((sftp), (path), strlen(path))

LIBSSH2_API int libssh2_sftp_stat_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len, int stat_type, LIBSSH2_SFTP_ATTRIBUTES *attrs);
#define libssh2_sftp_stat(sftp, path, attrs)                libssh2_sftp_stat_ex((sftp), (path), strlen(path), LIBSSH2_SFTP_STAT, (attrs))
#define libssh2_sftp_lstat(sftp, path, attrs)               libssh2_sftp_stat_ex((sftp), (path), strlen(path), LIBSSH2_SFTP_LSTAT, (attrs))
#define libssh2_sftp_setstat(sftp, path, attrs)             libssh2_sftp_stat_ex((sftp), (path), strlen(path), LIBSSH2_SFTP_SETSTAT, (attrs))

LIBSSH2_API int libssh2_sftp_symlink_ex(LIBSSH2_SFTP *sftp, const char *path, unsigned int path_len, char *target, unsigned int target_len, int link_type);
#define libssh2_sftp_symlink(sftp, orig, linkpath)          libssh2_sftp_symlink_ex((sftp), (orig), strlen(orig), (linkpath), strlen(linkpath), LIBSSH2_SFTP_SYMLINK)
#define libssh2_sftp_readlink(sftp, path, target, maxlen)   libssh2_sftp_symlink_ex((sftp), (path), strlen(path), (target), (maxlen), LIBSSH2_SFTP_READLINK)
#define libssh2_sftp_realpath(sftp, path, target, maxlen)   libssh2_sftp_symlink_ex((sftp), (path), strlen(path), (target), (maxlen), LIBSSH2_SFTP_REALPATH)

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* LIBSSH2_SFTP_H */
