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 */
27 int use_safe_inc_flist = 0;
32 extern int local_server;
36 extern int allow_inc_recurse;
37 extern int append_mode;
38 extern int fuzzy_basis;
39 extern int read_batch;
40 extern int delay_updates;
41 extern int checksum_seed;
42 extern int basis_dir_cnt;
43 extern int prune_empty_dirs;
44 extern int protocol_version;
45 extern int protect_args;
46 extern int preserve_uid;
47 extern int preserve_gid;
48 extern int preserve_acls;
49 extern int preserve_xattrs;
50 extern int need_messages_from_generator;
51 extern int delete_mode, delete_before, delete_during, delete_after;
52 extern char *shell_cmd;
53 extern char *partial_dir;
54 extern char *dest_option;
55 extern char *files_from;
56 extern char *filesfrom_host;
57 extern struct filter_list_struct filter_list;
58 extern int need_unsorted_flist;
60 extern iconv_t ic_send, ic_recv;
61 extern char *iconv_opt;
64 /* These index values are for the file-list's extra-attribute array. */
65 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx, unsort_ndx;
67 int receiver_symlink_times = 0; /* receiver can set the time on a symlink */
68 int sender_symlink_iconv = 0; /* sender should convert symlink content */
71 int filesfrom_convert = 0;
74 #define CF_INC_RECURSE (1<<0)
75 #define CF_SYMLINK_TIMES (1<<1)
76 #define CF_SYMLINK_ICONV (1<<2)
77 #define CF_SAFE_FLIST (1<<3)
79 static const char *client_info;
81 /* The server makes sure that if either side only supports a pre-release
82 * version of a protocol, that both sides must speak a compatible version
83 * of that protocol for it to be advertised as available. */
84 static void check_sub_protocol(void)
87 int their_protocol, their_sub;
88 #if SUBPROTOCOL_VERSION != 0
89 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
94 /* client_info starts with VER.SUB string if client is a pre-release. */
95 if (!(their_protocol = atoi(client_info))
96 || !(dot = strchr(client_info, '.'))
97 || !(their_sub = atoi(dot+1))) {
98 #if SUBPROTOCOL_VERSION != 0
105 if (their_protocol < protocol_version) {
107 protocol_version = their_protocol - 1;
111 if (their_protocol > protocol_version)
112 their_sub = 0; /* 0 == final version of older protocol */
113 if (their_sub != our_sub)
117 void set_allow_inc_recurse(void)
119 client_info = shell_cmd ? shell_cmd : "";
121 if (!recurse || use_qsort)
122 allow_inc_recurse = 0;
124 && (delete_before || delete_after
125 || delay_updates || prune_empty_dirs))
126 allow_inc_recurse = 0;
127 else if (am_server && !local_server
128 && (strchr(client_info, 'i') == NULL))
129 allow_inc_recurse = 0;
132 void setup_protocol(int f_out,int f_in)
135 file_extra_cnt += PTR_EXTRA_CNT;
139 uid_ndx = ++file_extra_cnt;
141 gid_ndx = ++file_extra_cnt;
142 if (preserve_acls && !am_sender)
143 acls_ndx = ++file_extra_cnt;
145 xattrs_ndx = ++file_extra_cnt;
148 set_allow_inc_recurse();
150 if (remote_protocol == 0) {
151 if (am_server && !local_server)
152 check_sub_protocol();
154 write_int(f_out, protocol_version);
155 remote_protocol = read_int(f_in);
156 if (protocol_version > remote_protocol)
157 protocol_version = remote_protocol;
159 if (read_batch && remote_protocol > protocol_version) {
160 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
161 remote_protocol, protocol_version);
162 exit_cleanup(RERR_PROTOCOL);
166 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
167 am_server? "Server" : "Client", remote_protocol, protocol_version);
169 if (remote_protocol < MIN_PROTOCOL_VERSION
170 || remote_protocol > MAX_PROTOCOL_VERSION) {
171 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
172 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
173 exit_cleanup(RERR_PROTOCOL);
175 if (remote_protocol < OLD_PROTOCOL_VERSION) {
176 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
177 am_server? "Client" : "Server");
179 if (protocol_version < MIN_PROTOCOL_VERSION) {
180 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
181 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
182 exit_cleanup(RERR_PROTOCOL);
184 if (protocol_version > PROTOCOL_VERSION) {
185 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
186 PROTOCOL_VERSION, am_server? "Server" : "Client");
187 exit_cleanup(RERR_PROTOCOL);
192 if (protocol_version < 30) {
193 if (append_mode == 1)
195 if (preserve_acls && !local_server) {
197 "--acls requires protocol 30 or higher"
198 " (negotiated %d).\n",
200 exit_cleanup(RERR_PROTOCOL);
202 if (preserve_xattrs && !local_server) {
204 "--xattrs requires protocol 30 or higher"
205 " (negotiated %d).\n",
207 exit_cleanup(RERR_PROTOCOL);
211 if (delete_mode && !(delete_before+delete_during+delete_after)) {
212 if (protocol_version < 30)
218 if (protocol_version < 29) {
221 "--fuzzy requires protocol 29 or higher"
222 " (negotiated %d).\n",
224 exit_cleanup(RERR_PROTOCOL);
227 if (basis_dir_cnt && inplace) {
229 "%s with --inplace requires protocol 29 or higher"
230 " (negotiated %d).\n",
231 dest_option, protocol_version);
232 exit_cleanup(RERR_PROTOCOL);
235 if (basis_dir_cnt > 1) {
237 "Using more than one %s option requires protocol"
238 " 29 or higher (negotiated %d).\n",
239 dest_option, protocol_version);
240 exit_cleanup(RERR_PROTOCOL);
243 if (prune_empty_dirs) {
245 "--prune-empty-dirs requires protocol 29 or higher"
246 " (negotiated %d).\n",
248 exit_cleanup(RERR_PROTOCOL);
250 } else if (protocol_version >= 30) {
253 compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
254 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
255 compat_flags |= CF_SYMLINK_TIMES;
258 compat_flags |= CF_SYMLINK_ICONV;
260 if (local_server || strchr(client_info, 'f') != NULL)
261 compat_flags |= CF_SAFE_FLIST;
262 write_byte(f_out, compat_flags);
264 compat_flags = read_byte(f_in);
265 /* The inc_recurse var MUST be set to 0 or 1. */
266 inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
268 receiver_symlink_times = am_server
269 ? strchr(client_info, 'L') != NULL
270 : !!(compat_flags & CF_SYMLINK_TIMES);
272 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
274 receiver_symlink_times = 1;
277 sender_symlink_iconv = iconv_opt && (am_server
278 ? local_server || strchr(client_info, 's') != NULL
279 : !!(compat_flags & CF_SYMLINK_ICONV));
281 if (inc_recurse && !allow_inc_recurse) {
282 /* This should only be able to happen in a batch. */
284 "Incompatible options specified for inc-recursive %s.\n",
285 read_batch ? "batch file" : "connection");
286 exit_cleanup(RERR_SYNTAX);
288 use_safe_inc_flist = !!(compat_flags & CF_SAFE_FLIST);
289 need_messages_from_generator = 1;
290 #if defined HAVE_LUTIMES && defined HAVE_UTIMES
291 } else if (!am_sender) {
292 receiver_symlink_times = 1;
296 if (need_unsorted_flist && (!am_sender || inc_recurse))
297 unsort_ndx = ++file_extra_cnt;
299 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
300 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
301 if (!am_sender || protocol_version >= 30)
302 flags |= MATCHFLG_PERISHABLE;
303 parse_rule(&filter_list, partial_dir, flags, 0);
308 if (protect_args && files_from) {
310 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
312 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
318 checksum_seed = time(NULL);
319 write_int(f_out, checksum_seed);
321 checksum_seed = read_int(f_in);