2 * Compatibility routines for older rsync protocol versions.
4 * Copyright (C) Andrew Tridgell 1996
5 * Copyright (C) Paul Mackerras 1996
6 * Copyright (C) 2004-2007 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
24 int remote_protocol
= 0;
25 int file_extra_cnt
= 0; /* count of file-list extras that everyone gets */
31 extern int local_server
;
35 extern int allow_inc_recurse
;
36 extern int append_mode
;
37 extern int fuzzy_basis
;
38 extern int read_batch
;
39 extern int delay_updates
;
40 extern int checksum_seed
;
41 extern int basis_dir_cnt
;
42 extern int prune_empty_dirs
;
43 extern int protocol_version
;
44 extern int protect_args
;
45 extern int preserve_uid
;
46 extern int preserve_gid
;
47 extern int preserve_acls
;
48 extern int preserve_xattrs
;
49 extern int need_messages_from_generator
;
50 extern int delete_mode
, delete_before
, delete_during
, delete_after
;
51 extern int delete_excluded
;
52 extern int make_backups
;
53 extern char *shell_cmd
; /* contains VER.SUB string if client is a pre-release */
54 extern char *backup_dir
, *backup_suffix
;
55 extern char *partial_dir
;
56 extern char *dest_option
;
57 extern char *files_from
;
58 extern char *filesfrom_host
;
59 extern struct filter_list_struct filter_list
;
61 extern char *iconv_opt
;
62 extern iconv_t ic_send
, ic_recv
;
65 /* These index values are for the file-list's extra-attribute array. */
66 int uid_ndx
, gid_ndx
, acls_ndx
, xattrs_ndx
;
70 int filesfrom_convert
= 0;
73 /* The server makes sure that if either side only supports a pre-release
74 * version of a protocol, that both sides must speak a compatible version
75 * of that protocol for it to be advertised as available. */
76 static void check_sub_protocol(void)
79 int their_protocol
, their_sub
;
80 #if SUBPROTOCOL_VERSION != 0
81 int our_sub
= protocol_version
< PROTOCOL_VERSION
? 0 : SUBPROTOCOL_VERSION
;
86 if (!shell_cmd
|| !(dot
= strchr(shell_cmd
, '.'))
87 || !(their_protocol
= atoi(shell_cmd
))
88 || !(their_sub
= atoi(dot
+1))) {
89 #if SUBPROTOCOL_VERSION != 0
96 if (their_protocol
< protocol_version
) {
98 protocol_version
= their_protocol
- 1;
102 if (their_protocol
> protocol_version
)
103 their_sub
= 0; /* 0 == final version of older protocol */
104 if (their_sub
!= our_sub
)
108 void setup_protocol(int f_out
,int f_in
)
111 file_extra_cnt
+= PTR_EXTRA_CNT
;
115 uid_ndx
= ++file_extra_cnt
;
117 gid_ndx
= ++file_extra_cnt
;
118 if (preserve_acls
&& !am_sender
)
119 acls_ndx
= ++file_extra_cnt
;
121 xattrs_ndx
= ++file_extra_cnt
;
123 if (remote_protocol
== 0) {
124 if (am_server
&& !local_server
)
125 check_sub_protocol();
127 write_int(f_out
, protocol_version
);
128 remote_protocol
= read_int(f_in
);
129 if (protocol_version
> remote_protocol
)
130 protocol_version
= remote_protocol
;
132 if (read_batch
&& remote_protocol
> protocol_version
) {
133 rprintf(FERROR
, "The protocol version in the batch file is too new (%d > %d).\n",
134 remote_protocol
, protocol_version
);
135 exit_cleanup(RERR_PROTOCOL
);
139 rprintf(FINFO
, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
140 am_server
? "Server" : "Client", remote_protocol
, protocol_version
);
142 if (remote_protocol
< MIN_PROTOCOL_VERSION
143 || remote_protocol
> MAX_PROTOCOL_VERSION
) {
144 rprintf(FERROR
,"protocol version mismatch -- is your shell clean?\n");
145 rprintf(FERROR
,"(see the rsync man page for an explanation)\n");
146 exit_cleanup(RERR_PROTOCOL
);
148 if (remote_protocol
< OLD_PROTOCOL_VERSION
) {
149 rprintf(FINFO
,"%s is very old version of rsync, upgrade recommended.\n",
150 am_server
? "Client" : "Server");
152 if (protocol_version
< MIN_PROTOCOL_VERSION
) {
153 rprintf(FERROR
, "--protocol must be at least %d on the %s.\n",
154 MIN_PROTOCOL_VERSION
, am_server
? "Server" : "Client");
155 exit_cleanup(RERR_PROTOCOL
);
157 if (protocol_version
> PROTOCOL_VERSION
) {
158 rprintf(FERROR
, "--protocol must be no more than %d on the %s.\n",
159 PROTOCOL_VERSION
, am_server
? "Server" : "Client");
160 exit_cleanup(RERR_PROTOCOL
);
163 if (protocol_version
< 30) {
164 if (append_mode
== 1)
166 if (preserve_acls
&& !local_server
) {
168 "--acls requires protocol 30 or higher"
169 " (negotiated %d).\n",
171 exit_cleanup(RERR_PROTOCOL
);
173 if (preserve_xattrs
&& !local_server
) {
175 "--xattrs requires protocol 30 or higher"
176 " (negotiated %d).\n",
178 exit_cleanup(RERR_PROTOCOL
);
182 if (delete_mode
&& !(delete_before
+delete_during
+delete_after
)) {
183 if (protocol_version
< 30)
189 if (protocol_version
< 29) {
192 "--fuzzy requires protocol 29 or higher"
193 " (negotiated %d).\n",
195 exit_cleanup(RERR_PROTOCOL
);
198 if (basis_dir_cnt
&& inplace
) {
200 "%s with --inplace requires protocol 29 or higher"
201 " (negotiated %d).\n",
202 dest_option
, protocol_version
);
203 exit_cleanup(RERR_PROTOCOL
);
206 if (basis_dir_cnt
> 1) {
208 "Using more than one %s option requires protocol"
209 " 29 or higher (negotiated %d).\n",
210 dest_option
, protocol_version
);
211 exit_cleanup(RERR_PROTOCOL
);
214 if (prune_empty_dirs
) {
216 "--prune-empty-dirs requires protocol 29 or higher"
217 " (negotiated %d).\n",
219 exit_cleanup(RERR_PROTOCOL
);
221 } else if (protocol_version
>= 30) {
222 if (recurse
&& allow_inc_recurse
223 && !delete_before
&& !delete_after
&& !delay_updates
224 && !use_qsort
&& !prune_empty_dirs
)
226 need_messages_from_generator
= 1;
230 if (iconv_opt
&& (!am_sender
|| inc_recurse
))
231 ic_ndx
= ++file_extra_cnt
;
234 if (partial_dir
&& *partial_dir
!= '/' && (!am_server
|| local_server
)) {
235 int flags
= MATCHFLG_NO_PREFIXES
| MATCHFLG_DIRECTORY
;
236 if (!am_sender
|| protocol_version
>= 30)
237 flags
|= MATCHFLG_PERISHABLE
;
238 parse_rule(&filter_list
, partial_dir
, flags
, 0);
243 if (protect_args
&& files_from
) {
245 filesfrom_convert
= filesfrom_host
&& ic_send
!= (iconv_t
)-1;
247 filesfrom_convert
= !filesfrom_host
&& ic_recv
!= (iconv_t
)-1;
253 checksum_seed
= time(NULL
);
254 write_int(f_out
, checksum_seed
);
256 checksum_seed
= read_int(f_in
);