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;
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 filter_rule_list 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)
76 #define CF_SAFE_FLIST (1<<3)
78 static const char *client_info;
80 /* The server makes sure that if either side only supports a pre-release
81 * version of a protocol, that both sides must speak a compatible version
82 * of that protocol for it to be advertised as available. */
83 static void check_sub_protocol(void)
86 int their_protocol, their_sub;
87 #if SUBPROTOCOL_VERSION != 0
88 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
93 /* client_info starts with VER.SUB string if client is a pre-release. */
94 if (!(their_protocol = atoi(client_info))
95 || !(dot = strchr(client_info, '.'))
96 || !(their_sub = atoi(dot+1))) {
97 #if SUBPROTOCOL_VERSION != 0
104 if (their_protocol < protocol_version) {
106 protocol_version = their_protocol - 1;
110 if (their_protocol > protocol_version)
111 their_sub = 0; /* 0 == final version of older protocol */
112 if (their_sub != our_sub)
116 void set_allow_inc_recurse(void)
118 client_info = shell_cmd ? shell_cmd : "";
120 if (!recurse || use_qsort)
121 allow_inc_recurse = 0;
123 && (delete_before || delete_after
124 || delay_updates || prune_empty_dirs))
125 allow_inc_recurse = 0;
126 else if (am_server && !local_server
127 && (strchr(client_info, 'i') == NULL))
128 allow_inc_recurse = 0;
131 void setup_protocol(int f_out,int f_in)
134 file_extra_cnt += PTR_EXTRA_CNT;
138 uid_ndx = ++file_extra_cnt;
140 gid_ndx = ++file_extra_cnt;
141 if (preserve_acls && !am_sender)
142 acls_ndx = ++file_extra_cnt;
144 xattrs_ndx = ++file_extra_cnt;
147 set_allow_inc_recurse();
149 if (remote_protocol == 0) {
150 if (am_server && !local_server)
151 check_sub_protocol();
153 write_int(f_out, protocol_version);
154 remote_protocol = read_int(f_in);
155 if (protocol_version > remote_protocol)
156 protocol_version = remote_protocol;
158 if (read_batch && remote_protocol > protocol_version) {
159 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
160 remote_protocol, protocol_version);
161 exit_cleanup(RERR_PROTOCOL);
164 if (DEBUG_GTE(PROTO, 1)) {
165 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
166 am_server? "Server" : "Client", remote_protocol, protocol_version);
168 if (remote_protocol < MIN_PROTOCOL_VERSION
169 || remote_protocol > MAX_PROTOCOL_VERSION) {
170 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
171 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
172 exit_cleanup(RERR_PROTOCOL);
174 if (remote_protocol < OLD_PROTOCOL_VERSION) {
175 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
176 am_server? "Client" : "Server");
178 if (protocol_version < MIN_PROTOCOL_VERSION) {
179 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
180 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
181 exit_cleanup(RERR_PROTOCOL);
183 if (protocol_version > PROTOCOL_VERSION) {
184 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
185 PROTOCOL_VERSION, am_server? "Server" : "Client");
186 exit_cleanup(RERR_PROTOCOL);
191 if (protocol_version < 30) {
192 if (append_mode == 1)
194 if (preserve_acls && !local_server) {
196 "--acls requires protocol 30 or higher"
197 " (negotiated %d).\n",
199 exit_cleanup(RERR_PROTOCOL);
201 if (preserve_xattrs && !local_server) {
203 "--xattrs requires protocol 30 or higher"
204 " (negotiated %d).\n",
206 exit_cleanup(RERR_PROTOCOL);
210 if (delete_mode && !(delete_before+delete_during+delete_after)) {
211 if (protocol_version < 30)
217 if (protocol_version < 29) {
220 "--fuzzy requires protocol 29 or higher"
221 " (negotiated %d).\n",
223 exit_cleanup(RERR_PROTOCOL);
226 if (basis_dir_cnt && inplace) {
228 "%s with --inplace requires protocol 29 or higher"
229 " (negotiated %d).\n",
230 dest_option, protocol_version);
231 exit_cleanup(RERR_PROTOCOL);
234 if (basis_dir_cnt > 1) {
236 "Using more than one %s option requires protocol"
237 " 29 or higher (negotiated %d).\n",
238 dest_option, protocol_version);
239 exit_cleanup(RERR_PROTOCOL);
242 if (prune_empty_dirs) {
244 "--prune-empty-dirs requires protocol 29 or higher"
245 " (negotiated %d).\n",
247 exit_cleanup(RERR_PROTOCOL);
249 } else if (protocol_version >= 30) {
252 compat_flags = allow_inc_recurse ? CF_INC_RECURSE : 0;
253 #ifdef CAN_SET_SYMLINK_TIMES
254 compat_flags |= CF_SYMLINK_TIMES;
257 compat_flags |= CF_SYMLINK_ICONV;
259 if (local_server || strchr(client_info, 'f') != NULL)
260 compat_flags |= CF_SAFE_FLIST;
261 write_byte(f_out, compat_flags);
263 compat_flags = read_byte(f_in);
264 /* The inc_recurse var MUST be set to 0 or 1. */
265 inc_recurse = compat_flags & CF_INC_RECURSE ? 1 : 0;
267 receiver_symlink_times = am_server
268 ? strchr(client_info, 'L') != NULL
269 : !!(compat_flags & CF_SYMLINK_TIMES);
271 #ifdef CAN_SET_SYMLINK_TIMES
273 receiver_symlink_times = 1;
276 sender_symlink_iconv = iconv_opt && (am_server
277 ? local_server || strchr(client_info, 's') != NULL
278 : !!(compat_flags & CF_SYMLINK_ICONV));
280 if (inc_recurse && !allow_inc_recurse) {
281 /* This should only be able to happen in a batch. */
283 "Incompatible options specified for inc-recursive %s.\n",
284 read_batch ? "batch file" : "connection");
285 exit_cleanup(RERR_SYNTAX);
287 use_safe_inc_flist = (compat_flags & CF_SAFE_FLIST) || protocol_version >= 31;
288 need_messages_from_generator = 1;
289 #ifdef CAN_SET_SYMLINK_TIMES
290 } else if (!am_sender) {
291 receiver_symlink_times = 1;
295 if (need_unsorted_flist && (!am_sender || inc_recurse))
296 unsort_ndx = ++file_extra_cnt;
298 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
299 int rflags = FILTRULE_NO_PREFIXES | FILTRULE_DIRECTORY;
300 if (!am_sender || protocol_version >= 30)
301 rflags |= FILTRULE_PERISHABLE;
302 parse_filter_str(&filter_list, partial_dir, rule_template(rflags), 0);
307 if (protect_args && files_from) {
309 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
311 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
317 checksum_seed = time(NULL);
318 write_int(f_out, checksum_seed);
320 checksum_seed = read_int(f_in);