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 */
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 char *shell_cmd;
52 extern char *partial_dir;
53 extern char *dest_option;
54 extern char *files_from;
55 extern char *filesfrom_host;
56 extern struct filter_list_struct filter_list;
57 extern int need_unsorted_flist;
59 extern iconv_t ic_send, ic_recv;
60 extern char *iconv_opt;
63 /* These index values are for the file-list's extra-attribute array. */
64 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
66 int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
67 int sender_symlink_iconv = 0; /* sender should convert symlink content */
70 int filesfrom_convert = 0;
73 #define CF_INC_RECURSE (1<<0)
74 #define CF_SYMLINK_TIMES (1<<1)
75 #define CF_SYMLINK_ICONV (1<<2)
77 static const char *client_info;
79 /* The server makes sure that if either side only supports a pre-release
80 * version of a protocol, that both sides must speak a compatible version
81 * of that protocol for it to be advertised as available. */
82 static void check_sub_protocol(void)
85 int their_protocol, their_sub;
86 #if SUBPROTOCOL_VERSION != 0
87 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
92 /* client_info starts with VER.SUB string if client is a pre-release. */
93 if (!(their_protocol = atoi(client_info))
94 || !(dot = strchr(client_info, '.'))
95 || !(their_sub = atoi(dot+1))) {
96 #if SUBPROTOCOL_VERSION != 0
103 if (their_protocol < protocol_version) {
105 protocol_version = their_protocol - 1;
109 if (their_protocol > protocol_version)
110 their_sub = 0; /* 0 == final version of older protocol */
111 if (their_sub != our_sub)
115 void set_allow_inc_recurse(void)
117 client_info = shell_cmd ? shell_cmd : "";
119 if (!recurse || use_qsort)
120 allow_inc_recurse = 0;
122 && (delete_before || delete_after
123 || delay_updates || prune_empty_dirs))
124 allow_inc_recurse = 0;
125 else if (am_server && !local_server
126 && (strchr(client_info, 'i') == NULL))
127 allow_inc_recurse = 0;
130 void setup_protocol(int f_out,int f_in)
133 file_extra_cnt += PTR_EXTRA_CNT;
137 uid_ndx = ++file_extra_cnt;
139 gid_ndx = ++file_extra_cnt;
140 if (preserve_acls && !am_sender)
141 acls_ndx = ++file_extra_cnt;
143 xattrs_ndx = ++file_extra_cnt;
146 set_allow_inc_recurse();
148 if (remote_protocol == 0) {
149 if (am_server && !local_server)
150 check_sub_protocol();
152 write_int(f_out, protocol_version);
153 remote_protocol = read_int(f_in);
154 if (protocol_version > remote_protocol)
155 protocol_version = remote_protocol;
157 if (read_batch && remote_protocol > protocol_version) {
158 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
159 remote_protocol, protocol_version);
160 exit_cleanup(RERR_PROTOCOL);
164 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
165 am_server? "Server" : "Client", remote_protocol, protocol_version);
167 if (remote_protocol < MIN_PROTOCOL_VERSION
168 || remote_protocol > MAX_PROTOCOL_VERSION) {
169 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
170 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
171 exit_cleanup(RERR_PROTOCOL);
173 if (remote_protocol < OLD_PROTOCOL_VERSION) {
174 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
175 am_server? "Client" : "Server");
177 if (protocol_version < MIN_PROTOCOL_VERSION) {
178 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
179 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
180 exit_cleanup(RERR_PROTOCOL);
182 if (protocol_version > PROTOCOL_VERSION) {
183 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
184 PROTOCOL_VERSION, am_server? "Server" : "Client");
185 exit_cleanup(RERR_PROTOCOL);
190 if (protocol_version < 30) {
191 if (append_mode == 1)
193 if (preserve_acls && !local_server) {
195 "--acls requires protocol 30 or higher"
196 " (negotiated %d).\n",
198 exit_cleanup(RERR_PROTOCOL);
200 if (preserve_xattrs && !local_server) {
202 "--xattrs requires protocol 30 or higher"
203 " (negotiated %d).\n",
205 exit_cleanup(RERR_PROTOCOL);
209 if (delete_mode && !(delete_before+delete_during+delete_after)) {
210 if (protocol_version < 30)
216 if (protocol_version < 29) {
219 "--fuzzy requires protocol 29 or higher"
220 " (negotiated %d).\n",
222 exit_cleanup(RERR_PROTOCOL);
225 if (basis_dir_cnt && inplace) {
227 "%s with --inplace requires protocol 29 or higher"
228 " (negotiated %d).\n",
229 dest_option, protocol_version);
230 exit_cleanup(RERR_PROTOCOL);
233 if (basis_dir_cnt > 1) {
235 "Using more than one %s option requires protocol"
236 " 29 or higher (negotiated %d).\n",
237 dest_option, protocol_version);
238 exit_cleanup(RERR_PROTOCOL);
241 if (prune_empty_dirs) {
243 "--prune-empty-dirs requires protocol 29 or higher"
244 " (negotiated %d).\n",
246 exit_cleanup(RERR_PROTOCOL);
248 } else if (protocol_version >= 30) {
251 compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
252 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
253 compat_flags |= CF_SYMLINK_TIMES;
256 compat_flags |= CF_SYMLINK_ICONV;
258 write_byte(f_out, compat_flags);
260 compat_flags = read_byte(f_in);
261 /* The inc_recurse var MUST be set to 0 or 1. */
262 inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
264 receiver_symlink_times = am_server
265 ? strchr(client_info, 'L') != NULL
266 : !!(compat_flags & CF_SYMLINK_TIMES);
268 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
270 receiver_symlink_times = 1;
273 sender_symlink_iconv = iconv_opt && (am_server
274 ? local_server || strchr(client_info, 's') != NULL
275 : !!(compat_flags & CF_SYMLINK_ICONV));
277 if (inc_recurse && !allow_inc_recurse) {
278 /* This should only be able to happen in a batch. */
280 "Incompatible options specified for inc-recursive %s.\n",
281 read_batch ? "batch file" : "connection");
282 exit_cleanup(RERR_SYNTAX);
284 need_messages_from_generator = 1;
285 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
286 } else if (!am_sender) {
287 receiver_symlink_times = 1;
291 if (need_unsorted_flist && (!am_sender || inc_recurse))
292 unsort_ndx = ++file_extra_cnt;
294 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
295 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
296 if (!am_sender || protocol_version >= 30)
297 flags |= MATCHFLG_PERISHABLE;
298 parse_rule(&filter_list, partial_dir, flags, 0);
303 if (protect_args && files_from) {
305 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
307 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
313 checksum_seed = time(NULL);
314 write_int(f_out, checksum_seed);
316 checksum_seed = read_int(f_in);