2 * Compatibility routines for older rsync protocol versions.
4 * Copyright (C) Andrew Tridgell 1996
5 * Copyright (C) Paul Mackerras 1996
6 * Copyright (C) 2004-2009 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;
59 extern char *iconv_opt;
62 /* These index values are for the file-list's extra-attribute array. */
63 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
65 int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
66 int sender_symlink_iconv = 0; /* sender should convert symlink content */
69 int filesfrom_convert = 0;
72 #define CF_INC_RECURSE (1<<0)
73 #define CF_SYMLINK_TIMES (1<<1)
74 #define CF_SYMLINK_ICONV (1<<2)
76 static const char *client_info;
78 /* The server makes sure that if either side only supports a pre-release
79 * version of a protocol, that both sides must speak a compatible version
80 * of that protocol for it to be advertised as available. */
81 static void check_sub_protocol(void)
84 int their_protocol, their_sub;
85 #if SUBPROTOCOL_VERSION != 0
86 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
91 /* client_info starts with VER.SUB string if client is a pre-release. */
92 if (!(their_protocol = atoi(client_info))
93 || !(dot = strchr(client_info, '.'))
94 || !(their_sub = atoi(dot+1))) {
95 #if SUBPROTOCOL_VERSION != 0
102 if (their_protocol < protocol_version) {
104 protocol_version = their_protocol - 1;
108 if (their_protocol > protocol_version)
109 their_sub = 0; /* 0 == final version of older protocol */
110 if (their_sub != our_sub)
114 void set_allow_inc_recurse(void)
116 client_info = shell_cmd ? shell_cmd : "";
118 if (!recurse || use_qsort)
119 allow_inc_recurse = 0;
121 && (delete_before || delete_after
122 || delay_updates || prune_empty_dirs))
123 allow_inc_recurse = 0;
124 else if (am_server && !local_server
125 && (strchr(client_info, 'i') == NULL))
126 allow_inc_recurse = 0;
129 void setup_protocol(int f_out,int f_in)
132 file_extra_cnt += PTR_EXTRA_CNT;
136 uid_ndx = ++file_extra_cnt;
138 gid_ndx = ++file_extra_cnt;
139 if (preserve_acls && !am_sender)
140 acls_ndx = ++file_extra_cnt;
142 xattrs_ndx = ++file_extra_cnt;
145 set_allow_inc_recurse();
147 if (remote_protocol == 0) {
148 if (am_server && !local_server)
149 check_sub_protocol();
151 write_int(f_out, protocol_version);
152 remote_protocol = read_int(f_in);
153 if (protocol_version > remote_protocol)
154 protocol_version = remote_protocol;
156 if (read_batch && remote_protocol > protocol_version) {
157 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
158 remote_protocol, protocol_version);
159 exit_cleanup(RERR_PROTOCOL);
162 if (DEBUG_GTE(PROTO, 1)) {
163 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
164 am_server? "Server" : "Client", remote_protocol, protocol_version);
166 if (remote_protocol < MIN_PROTOCOL_VERSION
167 || remote_protocol > MAX_PROTOCOL_VERSION) {
168 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
169 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
170 exit_cleanup(RERR_PROTOCOL);
172 if (remote_protocol < OLD_PROTOCOL_VERSION) {
173 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
174 am_server? "Client" : "Server");
176 if (protocol_version < MIN_PROTOCOL_VERSION) {
177 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
178 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
179 exit_cleanup(RERR_PROTOCOL);
181 if (protocol_version > PROTOCOL_VERSION) {
182 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
183 PROTOCOL_VERSION, am_server? "Server" : "Client");
184 exit_cleanup(RERR_PROTOCOL);
189 if (protocol_version < 30) {
190 if (append_mode == 1)
192 if (preserve_acls && !local_server) {
194 "--acls requires protocol 30 or higher"
195 " (negotiated %d).\n",
197 exit_cleanup(RERR_PROTOCOL);
199 if (preserve_xattrs && !local_server) {
201 "--xattrs requires protocol 30 or higher"
202 " (negotiated %d).\n",
204 exit_cleanup(RERR_PROTOCOL);
208 if (delete_mode && !(delete_before+delete_during+delete_after)) {
209 if (protocol_version < 30)
215 if (protocol_version < 29) {
218 "--fuzzy requires protocol 29 or higher"
219 " (negotiated %d).\n",
221 exit_cleanup(RERR_PROTOCOL);
224 if (basis_dir_cnt && inplace) {
226 "%s with --inplace requires protocol 29 or higher"
227 " (negotiated %d).\n",
228 dest_option, protocol_version);
229 exit_cleanup(RERR_PROTOCOL);
232 if (basis_dir_cnt > 1) {
234 "Using more than one %s option requires protocol"
235 " 29 or higher (negotiated %d).\n",
236 dest_option, protocol_version);
237 exit_cleanup(RERR_PROTOCOL);
240 if (prune_empty_dirs) {
242 "--prune-empty-dirs requires protocol 29 or higher"
243 " (negotiated %d).\n",
245 exit_cleanup(RERR_PROTOCOL);
247 } else if (protocol_version >= 30) {
250 compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
251 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
252 compat_flags |= CF_SYMLINK_TIMES;
255 compat_flags |= CF_SYMLINK_ICONV;
257 write_byte(f_out, compat_flags);
259 compat_flags = read_byte(f_in);
260 /* The inc_recurse var MUST be set to 0 or 1. */
261 inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
263 receiver_symlink_times = am_server
264 ? strchr(client_info, 'L') != NULL
265 : !!(compat_flags & CF_SYMLINK_TIMES);
267 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
269 receiver_symlink_times = 1;
272 sender_symlink_iconv = iconv_opt && (am_server
273 ? local_server || strchr(client_info, 's') != NULL
274 : !!(compat_flags & CF_SYMLINK_ICONV));
276 if (inc_recurse && !allow_inc_recurse) {
277 /* This should only be able to happen in a batch. */
279 "Incompatible options specified for inc-recursive %s.\n",
280 read_batch ? "batch file" : "connection");
281 exit_cleanup(RERR_SYNTAX);
283 need_messages_from_generator = 1;
284 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
285 } else if (!am_sender) {
286 receiver_symlink_times = 1;
290 if (need_unsorted_flist && (!am_sender || inc_recurse))
291 unsort_ndx = ++file_extra_cnt;
293 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
294 int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY;
295 if (!am_sender || protocol_version >= 30)
296 rflags |= FILTRULE_PERISHABLE;
297 parse_rule(&filter_list, partial_dir, rflags, 0);
302 if (protect_args && files_from) {
304 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
306 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
312 checksum_seed = time(NULL);
313 write_int(f_out, checksum_seed);
315 checksum_seed = read_int(f_in);