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 version 2 as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
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 fuzzy_basis;
37 extern int read_batch;
38 extern int max_delete;
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 preserve_uid;
45 extern int preserve_gid;
46 extern int preserve_acls;
47 extern int preserve_xattrs;
48 extern int preserve_hard_links;
49 extern int need_messages_from_generator;
50 extern int delete_mode, delete_before, delete_during, delete_after;
51 extern int delete_excluded;
52 extern int make_backups;
53 extern char *shell_cmd; /* contains VER.SUB string if client is a pre-release */
54 extern char *backup_dir, *backup_suffix;
55 extern char *partial_dir;
56 extern char *dest_option;
57 extern struct filter_list_struct filter_list;
59 /* These index values are for the file-list's extra-attribute array. */
60 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx;
62 /* The server makes sure that if either side only supports a pre-release
63 * version of a protocol, that both sides must speak a compatible version
64 * of that protocol for it to be advertised as available. */
65 static void check_sub_protocol(void)
68 int their_protocol, their_sub;
69 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
71 if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
72 || !(their_protocol = atoi(shell_cmd))
73 || !(their_sub = atoi(dot+1))) {
79 if (their_protocol < protocol_version) {
81 protocol_version = their_protocol - 1;
85 if (their_protocol > protocol_version)
86 their_sub = 0; /* 0 == final version */
87 if (their_sub != our_sub)
91 void setup_protocol(int f_out,int f_in)
94 file_extra_cnt += PTR_EXTRA_LEN;
98 uid_ndx = ++file_extra_cnt;
100 gid_ndx = ++file_extra_cnt;
101 if (preserve_acls && !am_sender)
102 acls_ndx = ++file_extra_cnt;
104 xattrs_ndx = ++file_extra_cnt;
106 if (remote_protocol == 0) {
107 if (am_server && !local_server)
108 check_sub_protocol();
110 write_int(f_out, protocol_version);
111 remote_protocol = read_int(f_in);
112 if (protocol_version > remote_protocol)
113 protocol_version = remote_protocol;
115 if (read_batch && remote_protocol > protocol_version) {
116 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
117 remote_protocol, protocol_version);
118 exit_cleanup(RERR_PROTOCOL);
122 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
123 am_server? "Server" : "Client", remote_protocol, protocol_version);
125 if (remote_protocol < MIN_PROTOCOL_VERSION
126 || remote_protocol > MAX_PROTOCOL_VERSION) {
127 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
128 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
129 exit_cleanup(RERR_PROTOCOL);
131 if (remote_protocol < OLD_PROTOCOL_VERSION) {
132 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
133 am_server? "Client" : "Server");
135 if (protocol_version < MIN_PROTOCOL_VERSION) {
136 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
137 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
138 exit_cleanup(RERR_PROTOCOL);
140 if (protocol_version > PROTOCOL_VERSION) {
141 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
142 PROTOCOL_VERSION, am_server? "Server" : "Client");
143 exit_cleanup(RERR_PROTOCOL);
146 if (protocol_version < 30) {
147 if (max_delete == 0 && am_sender) {
149 "--max-delete=0 requires protocol 30 or higher"
150 " (negotiated %d).\n",
152 exit_cleanup(RERR_PROTOCOL);
154 if (preserve_acls && !local_server) {
156 "--acls requires protocol 30 or higher"
157 " (negotiated %d).\n",
159 exit_cleanup(RERR_PROTOCOL);
161 if (preserve_xattrs && !local_server) {
163 "--xattrs requires protocol 30 or higher"
164 " (negotiated %d).\n",
166 exit_cleanup(RERR_PROTOCOL);
170 if (delete_mode && !(delete_before+delete_during+delete_after)) {
171 if (protocol_version < 30)
177 if (protocol_version < 29) {
180 "--fuzzy requires protocol 29 or higher"
181 " (negotiated %d).\n",
183 exit_cleanup(RERR_PROTOCOL);
186 if (basis_dir_cnt && inplace) {
188 "%s with --inplace requires protocol 29 or higher"
189 " (negotiated %d).\n",
190 dest_option, protocol_version);
191 exit_cleanup(RERR_PROTOCOL);
194 if (basis_dir_cnt > 1) {
196 "Using more than one %s option requires protocol"
197 " 29 or higher (negotiated %d).\n",
198 dest_option, protocol_version);
199 exit_cleanup(RERR_PROTOCOL);
202 if (prune_empty_dirs) {
204 "--prune-empty-dirs requires protocol 29 or higher"
205 " (negotiated %d).\n",
207 exit_cleanup(RERR_PROTOCOL);
209 } else if (protocol_version >= 30) {
210 if (recurse && allow_inc_recurse && !preserve_hard_links
211 && !delete_before && !delete_after && !delay_updates
212 && !prune_empty_dirs && !use_qsort)
214 need_messages_from_generator = 1;
217 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
218 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
219 if (!am_sender || protocol_version >= 30)
220 flags |= MATCHFLG_PERISHABLE;
221 parse_rule(&filter_list, partial_dir, flags, 0);
226 checksum_seed = time(NULL);
227 write_int(f_out, checksum_seed);
229 checksum_seed = read_int(f_in);