sftp.h

Go to the documentation of this file.

/*
 * This file is part of the SSH Library
 *
 * Copyright (c) 2003-2008 by Aris Adamantiadis
 *
 * The SSH Library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at your
 * option) any later version.
 *
 * The SSH Library 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 Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the SSH Library; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 * MA 02111-1307, USA.
 */

#ifndef SFTP_H
#define SFTP_H

#include <sys/types.h>

#include "libssh.h"

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _WIN32
#ifndef uid_t
  typedef uint32_t uid_t;
#endif /* uid_t */
#ifndef gid_t
  typedef uint32_t gid_t;
#endif /* gid_t */
#ifdef _MSC_VER
#ifndef ssize_t
  typedef _W64 SSIZE_T ssize_t;
#endif /* ssize_t */
#endif /* _MSC_VER */
#endif /* _WIN32 */

typedef struct sftp_attributes_struct* sftp_attributes;
typedef struct sftp_client_message_struct* sftp_client_message;
typedef struct sftp_dir_struct* sftp_dir;
typedef struct sftp_ext_struct *sftp_ext;
typedef struct sftp_file_struct* sftp_file;
typedef struct sftp_message_struct* sftp_message;
typedef struct sftp_packet_struct* sftp_packet;
typedef struct sftp_request_queue_struct* sftp_request_queue;
typedef struct sftp_session_struct* sftp_session;
typedef struct sftp_status_message_struct* sftp_status_message;
typedef struct sftp_statvfs_struct* sftp_statvfs_t;

struct sftp_session_struct {
    ssh_session session;
    ssh_channel channel;
    int server_version;
    int client_version;
    int version;
    sftp_request_queue queue;
    uint32_t id_counter;
    int errnum;
    void **handles;
    sftp_ext ext;
};

struct sftp_packet_struct {
    sftp_session sftp;
    uint8_t type;
    ssh_buffer payload;
};

/* file handler */
struct sftp_file_struct {
    sftp_session sftp;
    char *name;
    uint64_t offset;
    ssh_string handle;
    int eof;
    int nonblocking;
};

struct sftp_dir_struct {
    sftp_session sftp;
    char *name;
    ssh_string handle; /* handle to directory */
    ssh_buffer buffer; /* contains raw attributes from server which haven't been parsed */
    uint32_t count; /* counts the number of following attributes structures into buffer */
    int eof; /* end of directory listing */
};

struct sftp_message_struct {
    sftp_session sftp;
    uint8_t packet_type;
    ssh_buffer payload;
    uint32_t id;
};

/* this is a bunch of all data that could be into a message */
struct sftp_client_message_struct {
    sftp_session sftp;
    uint8_t type;
    uint32_t id;
    char *filename; /* can be "path" */
    uint32_t flags;
    sftp_attributes attr;
    ssh_string handle;
    uint64_t offset;
    uint32_t len;
    int attr_num;
    ssh_buffer attrbuf; /* used by sftp_reply_attrs */
    ssh_string data; /* can be newpath of rename() */
};

struct sftp_request_queue_struct {
    sftp_request_queue next;
    sftp_message message;
};

/* SSH_FXP_MESSAGE described into .7 page 26 */
struct sftp_status_message_struct {
    uint32_t id;
    uint32_t status;
    ssh_string error;
    ssh_string lang;
    char *errormsg;
    char *langmsg;
};

struct sftp_attributes_struct {
    char *name;
    char *longname; /* ls -l output on openssh, not reliable else */
    uint32_t flags;
    uint8_t type;
    uint64_t size;
    uint32_t uid;
    uint32_t gid;
    char *owner; /* set if openssh and version 4 */
    char *group; /* set if openssh and version 4 */
    uint32_t permissions;
    uint64_t atime64;
    uint32_t atime;
    uint32_t atime_nseconds;
    uint64_t createtime;
    uint32_t createtime_nseconds;
    uint64_t mtime64;
    uint32_t mtime;
    uint32_t mtime_nseconds;
    ssh_string acl;
    uint32_t extended_count;
    ssh_string extended_type;
    ssh_string extended_data;
};

struct sftp_statvfs_struct {
  uint64_t f_bsize; /* file system block size */
  uint64_t f_frsize; /* fundamental fs block size */
  uint64_t f_blocks; /* number of blocks (unit f_frsize) */
  uint64_t f_bfree; /* free blocks in file system */
  uint64_t f_bavail; /* free blocks for non-root */
  uint64_t f_files; /* total file inodes */
  uint64_t f_ffree; /* free file inodes */
  uint64_t f_favail; /* free file inodes for to non-root */
  uint64_t f_fsid; /* file system id */
  uint64_t f_flag; /* bit mask of f_flag values */
  uint64_t f_namemax; /* maximum filename length */
};

#define LIBSFTP_VERSION 3

LIBSSH_API sftp_session sftp_new(ssh_session session);

LIBSSH_API void sftp_free(sftp_session sftp);

LIBSSH_API int sftp_init(sftp_session sftp);

LIBSSH_API int sftp_get_error(sftp_session sftp);

LIBSSH_API unsigned int sftp_extensions_get_count(sftp_session sftp);

LIBSSH_API const char *sftp_extensions_get_name(sftp_session sftp, unsigned int indexn);

LIBSSH_API const char *sftp_extensions_get_data(sftp_session sftp, unsigned int indexn);

LIBSSH_API int sftp_extension_supported(sftp_session sftp, const char *name,
    const char *data);

LIBSSH_API sftp_dir sftp_opendir(sftp_session session, const char *path);

LIBSSH_API sftp_attributes sftp_readdir(sftp_session session, sftp_dir dir);

LIBSSH_API int sftp_dir_eof(sftp_dir dir);

LIBSSH_API sftp_attributes sftp_stat(sftp_session session, const char *path);

LIBSSH_API sftp_attributes sftp_lstat(sftp_session session, const char *path);

LIBSSH_API sftp_attributes sftp_fstat(sftp_file file);

LIBSSH_API void sftp_attributes_free(sftp_attributes file);

LIBSSH_API int sftp_closedir(sftp_dir dir);

LIBSSH_API int sftp_close(sftp_file file);

LIBSSH_API sftp_file sftp_open(sftp_session session, const char *file, int accesstype,
    mode_t mode);

LIBSSH_API void sftp_file_set_nonblocking(sftp_file handle);

LIBSSH_API void sftp_file_set_blocking(sftp_file handle);

LIBSSH_API ssize_t sftp_read(sftp_file file, void *buf, size_t count);

LIBSSH_API int sftp_async_read_begin(sftp_file file, uint32_t len);

LIBSSH_API int sftp_async_read(sftp_file file, void *data, uint32_t len, uint32_t id);

LIBSSH_API ssize_t sftp_write(sftp_file file, const void *buf, size_t count);

LIBSSH_API int sftp_seek(sftp_file file, uint32_t new_offset);

LIBSSH_API int sftp_seek64(sftp_file file, uint64_t new_offset);

LIBSSH_API unsigned long sftp_tell(sftp_file file);

LIBSSH_API uint64_t sftp_tell64(sftp_file file);

LIBSSH_API void sftp_rewind(sftp_file file);

LIBSSH_API int sftp_unlink(sftp_session sftp, const char *file);

LIBSSH_API int sftp_rmdir(sftp_session sftp, const char *directory);

LIBSSH_API int sftp_mkdir(sftp_session sftp, const char *directory, mode_t mode);

LIBSSH_API int sftp_rename(sftp_session sftp, const char *original, const  char *newname);

LIBSSH_API int sftp_setstat(sftp_session sftp, const char *file, sftp_attributes attr);

LIBSSH_API int sftp_chown(sftp_session sftp, const char *file, uid_t owner, gid_t group);

LIBSSH_API int sftp_chmod(sftp_session sftp, const char *file, mode_t mode);

LIBSSH_API int sftp_utimes(sftp_session sftp, const char *file, const struct timeval *times);

LIBSSH_API int sftp_symlink(sftp_session sftp, const char *target, const char *dest);

LIBSSH_API char *sftp_readlink(sftp_session sftp, const char *path);

LIBSSH_API sftp_statvfs_t sftp_statvfs(sftp_session sftp, const char *path);

LIBSSH_API sftp_statvfs_t sftp_fstatvfs(sftp_file file);

LIBSSH_API void sftp_statvfs_free(sftp_statvfs_t statvfs_o);

LIBSSH_API char *sftp_canonicalize_path(sftp_session sftp, const char *path);

LIBSSH_API int sftp_server_version(sftp_session sftp);

#ifdef WITH_SERVER

LIBSSH_API sftp_session sftp_server_new(ssh_session session, ssh_channel chan);

LIBSSH_API int sftp_server_init(sftp_session sftp);
#endif  /* WITH_SERVER */

/* this is not a public interface */
#define SFTP_HANDLES 256
sftp_packet sftp_packet_read(sftp_session sftp);
int sftp_packet_write(sftp_session sftp,uint8_t type, ssh_buffer payload);
void sftp_packet_free(sftp_packet packet);
int buffer_add_attributes(ssh_buffer buffer, sftp_attributes attr);
sftp_attributes sftp_parse_attr(sftp_session session, ssh_buffer buf,int expectname);
/* sftpserver.c */

sftp_client_message sftp_get_client_message(sftp_session sftp);
void sftp_client_message_free(sftp_client_message msg);
int sftp_reply_name(sftp_client_message msg, const char *name,
    sftp_attributes attr);
int sftp_reply_handle(sftp_client_message msg, ssh_string handle);
ssh_string sftp_handle_alloc(sftp_session sftp, void *info);
int sftp_reply_attr(sftp_client_message msg, sftp_attributes attr);
void *sftp_handle(sftp_session sftp, ssh_string handle);
int sftp_reply_status(sftp_client_message msg, uint32_t status, const char *message);
int sftp_reply_names_add(sftp_client_message msg, const char *file,
    const char *longname, sftp_attributes attr);
int sftp_reply_names(sftp_client_message msg);
int sftp_reply_data(sftp_client_message msg, const void *data, int len);
void sftp_handle_remove(sftp_session sftp, void *handle);

/* SFTP commands and constants */
#define SSH_FXP_INIT 1
#define SSH_FXP_VERSION 2
#define SSH_FXP_OPEN 3
#define SSH_FXP_CLOSE 4
#define SSH_FXP_READ 5
#define SSH_FXP_WRITE 6
#define SSH_FXP_LSTAT 7
#define SSH_FXP_FSTAT 8
#define SSH_FXP_SETSTAT 9
#define SSH_FXP_FSETSTAT 10
#define SSH_FXP_OPENDIR 11
#define SSH_FXP_READDIR 12
#define SSH_FXP_REMOVE 13
#define SSH_FXP_MKDIR 14
#define SSH_FXP_RMDIR 15
#define SSH_FXP_REALPATH 16
#define SSH_FXP_STAT 17
#define SSH_FXP_RENAME 18
#define SSH_FXP_READLINK 19
#define SSH_FXP_SYMLINK 20

#define SSH_FXP_STATUS 101
#define SSH_FXP_HANDLE 102
#define SSH_FXP_DATA 103
#define SSH_FXP_NAME 104
#define SSH_FXP_ATTRS 105

#define SSH_FXP_EXTENDED 200
#define SSH_FXP_EXTENDED_REPLY 201

/* attributes */
/* sftp draft is completely braindead : version 3 and 4 have different flags for same constants */
/* and even worst, version 4 has same flag for 2 different constants */
/* follow up : i won't develop any sftp4 compliant library before having a clarification */

#define SSH_FILEXFER_ATTR_SIZE 0x00000001
#define SSH_FILEXFER_ATTR_PERMISSIONS 0x00000004
#define SSH_FILEXFER_ATTR_ACCESSTIME 0x00000008
#define SSH_FILEXFER_ATTR_ACMODTIME  0x00000008
#define SSH_FILEXFER_ATTR_CREATETIME 0x00000010
#define SSH_FILEXFER_ATTR_MODIFYTIME 0x00000020
#define SSH_FILEXFER_ATTR_ACL 0x00000040
#define SSH_FILEXFER_ATTR_OWNERGROUP 0x00000080
#define SSH_FILEXFER_ATTR_SUBSECOND_TIMES 0x00000100
#define SSH_FILEXFER_ATTR_EXTENDED 0x80000000
#define SSH_FILEXFER_ATTR_UIDGID 0x00000002

/* types */
#define SSH_FILEXFER_TYPE_REGULAR 1
#define SSH_FILEXFER_TYPE_DIRECTORY 2
#define SSH_FILEXFER_TYPE_SYMLINK 3
#define SSH_FILEXFER_TYPE_SPECIAL 4
#define SSH_FILEXFER_TYPE_UNKNOWN 5

#define SSH_FX_OK 0

#define SSH_FX_EOF 1

#define SSH_FX_NO_SUCH_FILE 2

#define SSH_FX_PERMISSION_DENIED 3

#define SSH_FX_FAILURE 4

#define SSH_FX_BAD_MESSAGE 5

#define SSH_FX_NO_CONNECTION 6

#define SSH_FX_CONNECTION_LOST 7

#define SSH_FX_OP_UNSUPPORTED 8

#define SSH_FX_INVALID_HANDLE 9

#define SSH_FX_NO_SUCH_PATH 10

#define SSH_FX_FILE_ALREADY_EXISTS 11

#define SSH_FX_WRITE_PROTECT 12

#define SSH_FX_NO_MEDIA 13

/* file flags */
#define SSH_FXF_READ 0x01
#define SSH_FXF_WRITE 0x02
#define SSH_FXF_APPEND 0x04
#define SSH_FXF_CREAT 0x08
#define SSH_FXF_TRUNC 0x10
#define SSH_FXF_EXCL 0x20
#define SSH_FXF_TEXT 0x40

/* rename flags */
#define SSH_FXF_RENAME_OVERWRITE  0x00000001
#define SSH_FXF_RENAME_ATOMIC     0x00000002
#define SSH_FXF_RENAME_NATIVE     0x00000004

#define SFTP_OPEN SSH_FXP_OPEN
#define SFTP_CLOSE SSH_FXP_CLOSE
#define SFTP_READ SSH_FXP_READ
#define SFTP_WRITE SSH_FXP_WRITE
#define SFTP_LSTAT SSH_FXP_LSTAT
#define SFTP_FSTAT SSH_FXP_FSTAT
#define SFTP_SETSTAT SSH_FXP_SETSTAT
#define SFTP_FSETSTAT SSH_FXP_FSETSTAT
#define SFTP_OPENDIR SSH_FXP_OPENDIR
#define SFTP_READDIR SSH_FXP_READDIR
#define SFTP_REMOVE SSH_FXP_REMOVE
#define SFTP_MKDIR SSH_FXP_MKDIR
#define SFTP_RMDIR SSH_FXP_RMDIR
#define SFTP_REALPATH SSH_FXP_REALPATH
#define SFTP_STAT SSH_FXP_STAT
#define SFTP_RENAME SSH_FXP_RENAME
#define SFTP_READLINK SSH_FXP_READLINK
#define SFTP_SYMLINK SSH_FXP_SYMLINK

/* openssh flags */
#define SSH_FXE_STATVFS_ST_RDONLY 0x1 /* read-only */
#define SSH_FXE_STATVFS_ST_NOSUID 0x2 /* no setuid */

#ifdef __cplusplus
} ;
#endif

#endif /* SFTP_H */

/* vim: set ts=2 sw=2 et cindent: */