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 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;
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 */
68 int filesfrom_convert = 0;
71 #define CF_INC_RECURSE (1<<0)
72 #define CF_SYMLINK_TIMES (1<<1)
74 static const char *client_info;
76 /* The server makes sure that if either side only supports a pre-release
77 * version of a protocol, that both sides must speak a compatible version
78 * of that protocol for it to be advertised as available. */
79 static void check_sub_protocol(void)
82 int their_protocol, their_sub;
83 #if SUBPROTOCOL_VERSION != 0
84 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
89 /* client_info starts with VER.SUB string if client is a pre-release. */
90 if (!(their_protocol = atoi(client_info))
91 || !(dot = strchr(client_info, '.'))
92 || !(their_sub = atoi(dot+1))) {
93 #if SUBPROTOCOL_VERSION != 0
100 if (their_protocol < protocol_version) {
102 protocol_version = their_protocol - 1;
106 if (their_protocol > protocol_version)
107 their_sub = 0; /* 0 == final version of older protocol */
108 if (their_sub != our_sub)
112 void set_allow_inc_recurse(void)
114 client_info = shell_cmd ? shell_cmd : "";
116 if (!recurse || use_qsort)
117 allow_inc_recurse = 0;
119 && (delete_before || delete_after
120 || delay_updates || prune_empty_dirs))
121 allow_inc_recurse = 0;
122 else if (am_server && !local_server
123 && (strchr(client_info, 'i') == NULL))
124 allow_inc_recurse = 0;
127 void setup_protocol(int f_out,int f_in)
130 file_extra_cnt += PTR_EXTRA_CNT;
134 uid_ndx = ++file_extra_cnt;
136 gid_ndx = ++file_extra_cnt;
137 if (preserve_acls && !am_sender)
138 acls_ndx = ++file_extra_cnt;
140 xattrs_ndx = ++file_extra_cnt;
143 set_allow_inc_recurse();
145 if (remote_protocol == 0) {
146 if (am_server && !local_server)
147 check_sub_protocol();
149 write_int(f_out, protocol_version);
150 remote_protocol = read_int(f_in);
151 if (protocol_version > remote_protocol)
152 protocol_version = remote_protocol;
154 if (read_batch && remote_protocol > protocol_version) {
155 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
156 remote_protocol, protocol_version);
157 exit_cleanup(RERR_PROTOCOL);
161 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
162 am_server? "Server" : "Client", remote_protocol, protocol_version);
164 if (remote_protocol < MIN_PROTOCOL_VERSION
165 || remote_protocol > MAX_PROTOCOL_VERSION) {
166 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
167 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
168 exit_cleanup(RERR_PROTOCOL);
170 if (remote_protocol < OLD_PROTOCOL_VERSION) {
171 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
172 am_server? "Client" : "Server");
174 if (protocol_version < MIN_PROTOCOL_VERSION) {
175 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
176 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
177 exit_cleanup(RERR_PROTOCOL);
179 if (protocol_version > PROTOCOL_VERSION) {
180 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
181 PROTOCOL_VERSION, am_server? "Server" : "Client");
182 exit_cleanup(RERR_PROTOCOL);
187 if (protocol_version < 30) {
188 if (append_mode == 1)
190 if (preserve_acls && !local_server) {
192 "--acls requires protocol 30 or higher"
193 " (negotiated %d).\n",
195 exit_cleanup(RERR_PROTOCOL);
197 if (preserve_xattrs && !local_server) {
199 "--xattrs requires protocol 30 or higher"
200 " (negotiated %d).\n",
202 exit_cleanup(RERR_PROTOCOL);
206 if (delete_mode && !(delete_before+delete_during+delete_after)) {
207 if (protocol_version < 30)
213 if (protocol_version < 29) {
216 "--fuzzy requires protocol 29 or higher"
217 " (negotiated %d).\n",
219 exit_cleanup(RERR_PROTOCOL);
222 if (basis_dir_cnt && inplace) {
224 "%s with --inplace requires protocol 29 or higher"
225 " (negotiated %d).\n",
226 dest_option, protocol_version);
227 exit_cleanup(RERR_PROTOCOL);
230 if (basis_dir_cnt > 1) {
232 "Using more than one %s option requires protocol"
233 " 29 or higher (negotiated %d).\n",
234 dest_option, protocol_version);
235 exit_cleanup(RERR_PROTOCOL);
238 if (prune_empty_dirs) {
240 "--prune-empty-dirs requires protocol 29 or higher"
241 " (negotiated %d).\n",
243 exit_cleanup(RERR_PROTOCOL);
245 } else if (protocol_version >= 30) {
248 compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
249 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
250 compat_flags |= CF_SYMLINK_TIMES;
252 write_byte(f_out, compat_flags);
254 compat_flags = read_byte(f_in);
255 /* The inc_recurse var MUST be set to 0 or 1. */
256 inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
258 receiver_symlink_times = am_server
259 ? strchr(client_info, 'L') != NULL
260 : !!(compat_flags & CF_SYMLINK_TIMES);
262 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
264 receiver_symlink_times = 1;
266 if (inc_recurse && !allow_inc_recurse) {
267 /* This should only be able to happen in a batch. */
269 "Incompatible options specified for inc-recursive %s.\n",
270 read_batch ? "batch file" : "connection");
271 exit_cleanup(RERR_SYNTAX);
273 need_messages_from_generator = 1;
276 if (need_unsorted_flist && (!am_sender || inc_recurse))
277 unsort_ndx = ++file_extra_cnt;
279 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
280 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
281 if (!am_sender || protocol_version >= 30)
282 flags |= MATCHFLG_PERISHABLE;
283 parse_rule(&filter_list, partial_dir, flags, 0);
288 if (protect_args && files_from) {
290 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
292 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
298 checksum_seed = time(NULL);
299 write_int(f_out, checksum_seed);
301 checksum_seed = read_int(f_in);