2 * Compatibility routines for older rsync protocol versions.
4 * Copyright (C) Andrew Tridgell 1996
5 * Copyright (C) Paul Mackerras 1996
6 * Copyright (C) 2004-2008 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 */
30 extern int local_server;
34 extern int allow_inc_recurse;
35 extern int append_mode;
36 extern int fuzzy_basis;
37 extern int read_batch;
38 extern int delay_updates;
39 extern int checksum_seed;
40 extern int basis_dir_cnt;
41 extern int prune_empty_dirs;
42 extern int protocol_version;
43 extern int protect_args;
44 extern int preserve_uid;
45 extern int preserve_gid;
46 extern int preserve_acls;
47 extern int preserve_xattrs;
48 extern int need_messages_from_generator;
49 extern int delete_mode, delete_before, delete_during, delete_after;
50 extern char *shell_cmd;
51 extern char *partial_dir;
52 extern char *dest_option;
53 extern char *files_from;
54 extern char *filesfrom_host;
55 extern struct filter_list_struct filter_list;
56 extern int need_unsorted_flist;
58 extern iconv_t ic_send, ic_recv;
61 /* These index values are for the file-list's extra-attribute array. */
62 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
64 int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
67 int filesfrom_convert = 0;
70 #define CF_INC_RECURSE (1<<0)
71 #define CF_SYMLINK_TIMES (1<<1)
73 static const char *client_info;
75 /* The server makes sure that if either side only supports a pre-release
76 * version of a protocol, that both sides must speak a compatible version
77 * of that protocol for it to be advertised as available. */
78 static void check_sub_protocol(void)
81 int their_protocol, their_sub;
82 #if SUBPROTOCOL_VERSION != 0
83 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
88 /* client_info starts with VER.SUB string if client is a pre-release. */
89 if (!(their_protocol = atoi(client_info))
90 || !(dot = strchr(client_info, '.'))
91 || !(their_sub = atoi(dot+1))) {
92 #if SUBPROTOCOL_VERSION != 0
99 if (their_protocol < protocol_version) {
101 protocol_version = their_protocol - 1;
105 if (their_protocol > protocol_version)
106 their_sub = 0; /* 0 == final version of older protocol */
107 if (their_sub != our_sub)
111 void set_allow_inc_recurse(void)
113 client_info = shell_cmd ? shell_cmd : "";
115 if (!recurse || use_qsort)
116 allow_inc_recurse = 0;
118 && (delete_before || delete_after
119 || delay_updates || prune_empty_dirs))
120 allow_inc_recurse = 0;
121 else if (am_server && !local_server
122 && (strchr(client_info, 'i') == NULL))
123 allow_inc_recurse = 0;
126 void setup_protocol(int f_out,int f_in)
129 file_extra_cnt += PTR_EXTRA_CNT;
133 uid_ndx = ++file_extra_cnt;
135 gid_ndx = ++file_extra_cnt;
136 if (preserve_acls && !am_sender)
137 acls_ndx = ++file_extra_cnt;
139 xattrs_ndx = ++file_extra_cnt;
142 set_allow_inc_recurse();
144 if (remote_protocol == 0) {
145 if (am_server && !local_server)
146 check_sub_protocol();
148 write_int(f_out, protocol_version);
149 remote_protocol = read_int(f_in);
150 if (protocol_version > remote_protocol)
151 protocol_version = remote_protocol;
153 if (read_batch && remote_protocol > protocol_version) {
154 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
155 remote_protocol, protocol_version);
156 exit_cleanup(RERR_PROTOCOL);
159 if (DEBUG_GTE(PROTO, 1)) {
160 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
161 am_server? "Server" : "Client", remote_protocol, protocol_version);
163 if (remote_protocol < MIN_PROTOCOL_VERSION
164 || remote_protocol > MAX_PROTOCOL_VERSION) {
165 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
166 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
167 exit_cleanup(RERR_PROTOCOL);
169 if (remote_protocol < OLD_PROTOCOL_VERSION) {
170 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
171 am_server? "Client" : "Server");
173 if (protocol_version < MIN_PROTOCOL_VERSION) {
174 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
175 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
176 exit_cleanup(RERR_PROTOCOL);
178 if (protocol_version > PROTOCOL_VERSION) {
179 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
180 PROTOCOL_VERSION, am_server? "Server" : "Client");
181 exit_cleanup(RERR_PROTOCOL);
186 if (protocol_version < 30) {
187 if (append_mode == 1)
189 if (preserve_acls && !local_server) {
191 "--acls requires protocol 30 or higher"
192 " (negotiated %d).\n",
194 exit_cleanup(RERR_PROTOCOL);
196 if (preserve_xattrs && !local_server) {
198 "--xattrs requires protocol 30 or higher"
199 " (negotiated %d).\n",
201 exit_cleanup(RERR_PROTOCOL);
205 if (delete_mode && !(delete_before+delete_during+delete_after)) {
206 if (protocol_version < 30)
212 if (protocol_version < 29) {
215 "--fuzzy requires protocol 29 or higher"
216 " (negotiated %d).\n",
218 exit_cleanup(RERR_PROTOCOL);
221 if (basis_dir_cnt && inplace) {
223 "%s with --inplace requires protocol 29 or higher"
224 " (negotiated %d).\n",
225 dest_option, protocol_version);
226 exit_cleanup(RERR_PROTOCOL);
229 if (basis_dir_cnt > 1) {
231 "Using more than one %s option requires protocol"
232 " 29 or higher (negotiated %d).\n",
233 dest_option, protocol_version);
234 exit_cleanup(RERR_PROTOCOL);
237 if (prune_empty_dirs) {
239 "--prune-empty-dirs requires protocol 29 or higher"
240 " (negotiated %d).\n",
242 exit_cleanup(RERR_PROTOCOL);
244 } else if (protocol_version >= 30) {
247 compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
248 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
249 compat_flags |= CF_SYMLINK_TIMES;
251 write_byte(f_out, compat_flags);
253 compat_flags = read_byte(f_in);
254 /* The inc_recurse var MUST be set to 0 or 1. */
255 inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
257 receiver_symlink_times = am_server
258 ? strchr(client_info, 'L') != NULL
259 : !!(compat_flags & CF_SYMLINK_TIMES);
261 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
263 receiver_symlink_times = 1;
265 if (inc_recurse && !allow_inc_recurse) {
266 /* This should only be able to happen in a batch. */
268 "Incompatible options specified for inc-recursive %s.\n",
269 read_batch ? "batch file" : "connection");
270 exit_cleanup(RERR_SYNTAX);
272 need_messages_from_generator = 1;
273 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
274 } else if (!am_sender) {
275 receiver_symlink_times = 1;
279 if (need_unsorted_flist && (!am_sender || inc_recurse))
280 unsort_ndx = ++file_extra_cnt;
282 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
283 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
284 if (!am_sender || protocol_version >= 30)
285 flags |= MATCHFLG_PERISHABLE;
286 parse_rule(&filter_list, partial_dir, flags, 0);
291 if (protect_args && files_from) {
293 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
295 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
301 checksum_seed = time(NULL);
302 write_int(f_out, checksum_seed);
304 checksum_seed = read_int(f_in);