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; /* contains VER.SUB string if client is a pre-release */
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;
66 int filesfrom_convert = 0;
69 /* The server makes sure that if either side only supports a pre-release
70 * version of a protocol, that both sides must speak a compatible version
71 * of that protocol for it to be advertised as available. */
72 static void check_sub_protocol(void)
75 int their_protocol, their_sub;
76 #if SUBPROTOCOL_VERSION != 0
77 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
82 if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
83 || !(their_protocol = atoi(shell_cmd))
84 || !(their_sub = atoi(dot+1))) {
85 #if SUBPROTOCOL_VERSION != 0
92 if (their_protocol < protocol_version) {
94 protocol_version = their_protocol - 1;
98 if (their_protocol > protocol_version)
99 their_sub = 0; /* 0 == final version of older protocol */
100 if (their_sub != our_sub)
104 void set_allow_inc_recurse(void)
106 if (!recurse || use_qsort)
107 allow_inc_recurse = 0;
109 && (delete_before || delete_after
110 || delay_updates || prune_empty_dirs))
111 allow_inc_recurse = 0;
112 else if (am_server && !local_server
113 && (!shell_cmd || strchr(shell_cmd, 'i') == NULL))
114 allow_inc_recurse = 0;
117 void setup_protocol(int f_out,int f_in)
120 file_extra_cnt += PTR_EXTRA_CNT;
124 uid_ndx = ++file_extra_cnt;
126 gid_ndx = ++file_extra_cnt;
127 if (preserve_acls && !am_sender)
128 acls_ndx = ++file_extra_cnt;
130 xattrs_ndx = ++file_extra_cnt;
133 set_allow_inc_recurse();
135 if (remote_protocol == 0) {
136 if (am_server && !local_server)
137 check_sub_protocol();
139 write_int(f_out, protocol_version);
140 remote_protocol = read_int(f_in);
141 if (protocol_version > remote_protocol)
142 protocol_version = remote_protocol;
144 if (read_batch && remote_protocol > protocol_version) {
145 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
146 remote_protocol, protocol_version);
147 exit_cleanup(RERR_PROTOCOL);
151 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
152 am_server? "Server" : "Client", remote_protocol, protocol_version);
154 if (remote_protocol < MIN_PROTOCOL_VERSION
155 || remote_protocol > MAX_PROTOCOL_VERSION) {
156 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
157 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
158 exit_cleanup(RERR_PROTOCOL);
160 if (remote_protocol < OLD_PROTOCOL_VERSION) {
161 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
162 am_server? "Client" : "Server");
164 if (protocol_version < MIN_PROTOCOL_VERSION) {
165 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
166 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
167 exit_cleanup(RERR_PROTOCOL);
169 if (protocol_version > PROTOCOL_VERSION) {
170 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
171 PROTOCOL_VERSION, am_server? "Server" : "Client");
172 exit_cleanup(RERR_PROTOCOL);
177 if (protocol_version < 30) {
178 if (append_mode == 1)
180 if (preserve_acls && !local_server) {
182 "--acls requires protocol 30 or higher"
183 " (negotiated %d).\n",
185 exit_cleanup(RERR_PROTOCOL);
187 if (preserve_xattrs && !local_server) {
189 "--xattrs requires protocol 30 or higher"
190 " (negotiated %d).\n",
192 exit_cleanup(RERR_PROTOCOL);
196 if (delete_mode && !(delete_before+delete_during+delete_after)) {
197 if (protocol_version < 30)
203 if (protocol_version < 29) {
206 "--fuzzy requires protocol 29 or higher"
207 " (negotiated %d).\n",
209 exit_cleanup(RERR_PROTOCOL);
212 if (basis_dir_cnt && inplace) {
214 "%s with --inplace requires protocol 29 or higher"
215 " (negotiated %d).\n",
216 dest_option, protocol_version);
217 exit_cleanup(RERR_PROTOCOL);
220 if (basis_dir_cnt > 1) {
222 "Using more than one %s option requires protocol"
223 " 29 or higher (negotiated %d).\n",
224 dest_option, protocol_version);
225 exit_cleanup(RERR_PROTOCOL);
228 if (prune_empty_dirs) {
230 "--prune-empty-dirs requires protocol 29 or higher"
231 " (negotiated %d).\n",
233 exit_cleanup(RERR_PROTOCOL);
235 } else if (protocol_version >= 30) {
236 /* The inc_recurse var MUST be set to 0 or 1. */
238 inc_recurse = allow_inc_recurse ? 1 : 0;
239 write_byte(f_out, inc_recurse);
241 inc_recurse = read_byte(f_in) ? 1 : 0;
242 if (inc_recurse && !allow_inc_recurse) {
243 /* This should only be able to happen in a batch. */
245 "Incompatible options specified for inc-recursive %s.\n",
246 read_batch ? "batch file" : "connection");
247 exit_cleanup(RERR_SYNTAX);
249 need_messages_from_generator = 1;
252 if (need_unsorted_flist && (!am_sender || inc_recurse))
253 unsort_ndx = ++file_extra_cnt;
255 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
256 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
257 if (!am_sender || protocol_version >= 30)
258 flags |= MATCHFLG_PERISHABLE;
259 parse_rule(&filter_list, partial_dir, flags, 0);
264 if (protect_args && files_from) {
266 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
268 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
274 checksum_seed = time(NULL);
275 write_int(f_out, checksum_seed);
277 checksum_seed = read_int(f_in);