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/* $Id: extern.h,v 1.11 2019/02/16 10:46:22 florian Exp $ */
/*
* Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef EXTERN_H
#define EXTERN_H
/*
* This is the rsync protocol version that we support.
*/
#define RSYNC_PROTOCOL (27)
/*
* Maximum amount of file data sent over the wire at once.
*/
#define MAX_CHUNK (32 * 1024)
/*
* This is the minimum size for a block of data not including those in
* the remainder block.
*/
#define BLOCK_SIZE_MIN (700)
/*
* The sender and receiver use a two-phase synchronisation process.
* The first uses two-byte hashes; the second, 16-byte.
* (The second must hold a full MD4 digest.)
*/
#define CSUM_LENGTH_PHASE1 (2)
#define CSUM_LENGTH_PHASE2 (16)
/*
* Operating mode for a client or a server.
* Sender means we synchronise local files with those from remote.
* Receiver is the opposite.
* This is relative to which host we're running on.
*/
enum fmode {
FARGS_SENDER,
FARGS_RECEIVER
};
/*
* File arguments given on the command line.
* See struct opts.
*/
struct fargs {
char *host; /* hostname or NULL if local */
char **sources; /* transfer source */
size_t sourcesz; /* number of sources */
char *sink; /* transfer endpoint */
enum fmode mode; /* mode of operation */
int remote; /* uses rsync:// or :: for remote */
char *module; /* if rsync://, the module */
};
/*
* The subset of stat(2) information that we need.
* (There are some parts we don't use yet.)
*/
struct flstat {
mode_t mode; /* mode */
uid_t uid; /* user */
gid_t gid; /* group */
off_t size; /* size */
time_t mtime; /* modification */
unsigned int flags;
#define FLSTAT_TOP_DIR 0x01 /* a top-level directory */
};
/*
* A list of files with their statistics.
*/
struct flist {
char *path; /* path relative to root */
const char *wpath; /* "working" path for receiver */
struct flstat st; /* file information */
char *link; /* symlink target or NULL */
};
/*
* Options passed into the command line.
* See struct fargs.
*/
struct opts {
int sender; /* --sender */
int server; /* --server */
int recursive; /* -r */
int verbose; /* -v */
int dry_run; /* -n */
int preserve_times; /* -t */
int preserve_perms; /* -p */
int preserve_links; /* -l */
int preserve_gids; /* -g */
int preserve_uids; /* -u */
int del; /* --delete */
char *rsync_path; /* --rsync-path */
char *ssh_prog; /* --rsh or -e */
};
/*
* An individual block description for a file.
* See struct blkset.
*/
struct blk {
off_t offs; /* offset in file */
size_t idx; /* block index */
size_t len; /* bytes in block */
uint32_t chksum_short; /* fast checksum */
unsigned char chksum_long[CSUM_LENGTH_PHASE2]; /* slow checksum */
};
/*
* When transferring file contents, we break the file down into blocks
* and work with those.
*/
struct blkset {
off_t size; /* file size */
size_t rem; /* terminal block length if non-zero */
size_t len; /* block length */
size_t csum; /* checksum length */
struct blk *blks; /* all blocks */
size_t blksz; /* number of blks */
};
/*
* Values required during a communication session.
*/
struct sess {
const struct opts *opts; /* system options */
int32_t seed; /* checksum seed */
int32_t lver; /* local version */
int32_t rver; /* remote version */
uint64_t total_read; /* non-logging wire/reads */
uint64_t total_size; /* total file size */
uint64_t total_write; /* non-logging wire/writes */
int mplex_reads; /* multiplexing reads? */
size_t mplex_read_remain; /* remaining bytes */
int mplex_writes; /* multiplexing writes? */
};
/*
* Combination of name and numeric id for groups and users.
*/
struct ident {
int32_t id; /* the gid_t or uid_t */
int32_t mapped; /* if receiving, the mapped gid */
char *name; /* resolved name */
};
struct download;
struct upload;
#define LOG0(_sess, _fmt, ...) \
rsync_log((_sess), __FILE__, __LINE__, -1, (_fmt), ##__VA_ARGS__)
#define LOG1(_sess, _fmt, ...) \
rsync_log((_sess), __FILE__, __LINE__, 0, (_fmt), ##__VA_ARGS__)
#define LOG2(_sess, _fmt, ...) \
rsync_log((_sess), __FILE__, __LINE__, 1, (_fmt), ##__VA_ARGS__)
#define LOG3(_sess, _fmt, ...) \
rsync_log((_sess), __FILE__, __LINE__, 2, (_fmt), ##__VA_ARGS__)
#define LOG4(_sess, _fmt, ...) \
rsync_log((_sess), __FILE__, __LINE__, 3, (_fmt), ##__VA_ARGS__)
#define ERRX1(_sess, _fmt, ...) \
rsync_errx1((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
#define WARNX(_sess, _fmt, ...) \
rsync_warnx((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
#define WARN(_sess, _fmt, ...) \
rsync_warn((_sess), 0, __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
#define WARN1(_sess, _fmt, ...) \
rsync_warn((_sess), 1, __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
#define WARN2(_sess, _fmt, ...) \
rsync_warn((_sess), 2, __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
#define ERR(_sess, _fmt, ...) \
rsync_err((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
#define ERRX(_sess, _fmt, ...) \
rsync_errx((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
__BEGIN_DECLS
void rsync_log(struct sess *,
const char *, size_t, int, const char *, ...)
__attribute__((format(printf, 5, 6)));
void rsync_warnx1(struct sess *,
const char *, size_t, const char *, ...)
__attribute__((format(printf, 4, 5)));
void rsync_warn(struct sess *, int,
const char *, size_t, const char *, ...)
__attribute__((format(printf, 5, 6)));
void rsync_warnx(struct sess *, const char *,
size_t, const char *, ...)
__attribute__((format(printf, 4, 5)));
void rsync_err(struct sess *, const char *,
size_t, const char *, ...)
__attribute__((format(printf, 4, 5)));
void rsync_errx(struct sess *, const char *,
size_t, const char *, ...)
__attribute__((format(printf, 4, 5)));
void rsync_errx1(struct sess *, const char *,
size_t, const char *, ...)
__attribute__((format(printf, 4, 5)));
int flist_del(struct sess *, int,
const struct flist *, size_t);
int flist_gen(struct sess *, size_t, char **,
struct flist **, size_t *);
int flist_gen_local(struct sess *, const char *,
struct flist **, size_t *);
void flist_free(struct flist *, size_t);
int flist_recv(struct sess *, int,
struct flist **, size_t *);
int flist_send(struct sess *, int, int,
const struct flist *, size_t);
int flist_gen_dels(struct sess *, const char *,
struct flist **, size_t *,
const struct flist *, size_t);
char **fargs_cmdline(struct sess *, const struct fargs *);
int io_read_buf(struct sess *, int, void *, size_t);
int io_read_byte(struct sess *, int, uint8_t *);
int io_read_check(struct sess *, int);
int io_read_flush(struct sess *, int);
int io_read_int(struct sess *, int, int32_t *);
int io_read_long(struct sess *, int, int64_t *);
int io_read_size(struct sess *, int, size_t *);
int io_read_ulong(struct sess *, int, uint64_t *);
int io_write_buf(struct sess *, int, const void *, size_t);
int io_write_byte(struct sess *, int, uint8_t);
int io_write_int(struct sess *, int, int32_t);
int io_write_line(struct sess *, int, const char *);
int io_write_long(struct sess *, int, int64_t);
void io_buffer_int(struct sess *, void *,
size_t *, size_t, int32_t);
void io_buffer_buf(struct sess *, void *,
size_t *, size_t, const void *, size_t);
void io_unbuffer_int(struct sess *, const void *,
size_t *, size_t, int32_t *);
int io_unbuffer_size(struct sess *, const void *,
size_t *, size_t, size_t *);
void io_unbuffer_buf(struct sess *, const void *,
size_t *, size_t, void *, size_t);
void rsync_child(const struct opts *, int, const struct fargs *)
__attribute__((noreturn));
int rsync_receiver(struct sess *, int, int, const char *);
int rsync_sender(struct sess *, int, int, size_t, char **);
int rsync_client(const struct opts *, int, const struct fargs *);
int rsync_socket(const struct opts *, const struct fargs *);
int rsync_server(const struct opts *, size_t, char *[]);
int rsync_downloader(struct download *, struct sess *, int *);
int rsync_set_metadata(struct sess *, int, int,
const struct flist *, const char *);
int rsync_uploader(struct upload *,
int *, struct sess *, int *);
int rsync_uploader_tail(struct upload *, struct sess *);
struct download *download_alloc(struct sess *, int,
const struct flist *, size_t, int);
void download_free(struct download *);
struct upload *upload_alloc(struct sess *, int, int, size_t,
const struct flist *, size_t, mode_t);
void upload_free(struct upload *);
struct blkset *blk_recv(struct sess *, int, const char *);
int blk_recv_ack(struct sess *,
int, const struct blkset *, int32_t);
int blk_match(struct sess *, int,
const struct blkset *, const char *);
int blk_send(struct sess *, int, size_t,
const struct blkset *, const char *);
int blk_send_ack(struct sess *, int, struct blkset *);
int blk_merge(struct sess *, int, int,
const struct blkset *, int, const char *,
const void *, size_t, float *);
void blkset_free(struct blkset *);
uint32_t hash_fast(const void *, size_t);
void hash_slow(const void *, size_t,
unsigned char *, const struct sess *);
void hash_file(const void *, size_t,
unsigned char *, const struct sess *);
int mkpath(struct sess *, char *);
int mkstempat(int, char *);
char *mkstemplinkat(char*, int, char *);
int mktemplate(char **, const char *, int);
char *symlink_read(struct sess *, const char *);
char *symlinkat_read(struct sess *, int, const char *);
int sess_stats_send(struct sess *, int);
int sess_stats_recv(struct sess *, int);
int idents_add(struct sess *, int, struct ident **, size_t *,
int32_t);
void idents_assign_gid(struct sess *,
struct flist *, size_t, const struct ident *, size_t);
void idents_assign_uid(struct sess *,
struct flist *, size_t, const struct ident *, size_t);
void idents_free(struct ident *, size_t);
int idents_recv(struct sess *, int, struct ident **, size_t *);
void idents_remap(struct sess *, int, struct ident *, size_t);
int idents_send(struct sess *, int, const struct ident *, size_t);
__END_DECLS
#endif /*!EXTERN_H*/
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