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 /* The server makes sure that if either side only supports a pre-release
60 * version of a protocol, that both sides must speak a compatible version
61 * of that protocol for it to be advertised as available. */
62 static void check_sub_protocol(void)
65 int their_protocol, their_sub;
66 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
68 if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
69 || !(their_protocol = atoi(shell_cmd))
70 || !(their_sub = atoi(dot+1))) {
76 if (their_protocol < protocol_version) {
78 protocol_version = their_protocol - 1;
82 if (their_protocol > protocol_version)
83 their_sub = 0; /* 0 == final version */
84 if (their_sub != our_sub)
88 void setup_protocol(int f_out,int f_in)
91 file_extra_cnt += PTR_EXTRA_LEN;
95 preserve_uid = ++file_extra_cnt;
97 preserve_gid = ++file_extra_cnt;
98 if (preserve_acls && !am_sender)
99 preserve_acls = ++file_extra_cnt;
101 preserve_xattrs = ++file_extra_cnt;
103 if (remote_protocol == 0) {
104 if (am_server && !local_server)
105 check_sub_protocol();
107 write_int(f_out, protocol_version);
108 remote_protocol = read_int(f_in);
109 if (protocol_version > remote_protocol)
110 protocol_version = remote_protocol;
112 if (read_batch && remote_protocol > protocol_version) {
113 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
114 remote_protocol, protocol_version);
115 exit_cleanup(RERR_PROTOCOL);
119 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
120 am_server? "Server" : "Client", remote_protocol, protocol_version);
122 if (remote_protocol < MIN_PROTOCOL_VERSION
123 || remote_protocol > MAX_PROTOCOL_VERSION) {
124 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
125 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
126 exit_cleanup(RERR_PROTOCOL);
128 if (remote_protocol < OLD_PROTOCOL_VERSION) {
129 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
130 am_server? "Client" : "Server");
132 if (protocol_version < MIN_PROTOCOL_VERSION) {
133 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
134 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
135 exit_cleanup(RERR_PROTOCOL);
137 if (protocol_version > PROTOCOL_VERSION) {
138 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
139 PROTOCOL_VERSION, am_server? "Server" : "Client");
140 exit_cleanup(RERR_PROTOCOL);
143 if (protocol_version < 30) {
144 if (max_delete == 0 && am_sender) {
146 "--max-delete=0 requires protocol 30 or higher"
147 " (negotiated %d).\n",
149 exit_cleanup(RERR_PROTOCOL);
151 if (preserve_acls && !local_server) {
153 "--acls requires protocol 30 or higher"
154 " (negotiated %d).\n",
156 exit_cleanup(RERR_PROTOCOL);
158 if (preserve_xattrs && !local_server) {
160 "--xattrs requires protocol 30 or higher"
161 " (negotiated %d).\n",
163 exit_cleanup(RERR_PROTOCOL);
167 if (delete_mode && !(delete_before+delete_during+delete_after)) {
168 if (protocol_version < 30)
174 if (protocol_version < 29) {
177 "--fuzzy requires protocol 29 or higher"
178 " (negotiated %d).\n",
180 exit_cleanup(RERR_PROTOCOL);
183 if (basis_dir_cnt && inplace) {
185 "%s with --inplace requires protocol 29 or higher"
186 " (negotiated %d).\n",
187 dest_option, protocol_version);
188 exit_cleanup(RERR_PROTOCOL);
191 if (basis_dir_cnt > 1) {
193 "Using more than one %s option requires protocol"
194 " 29 or higher (negotiated %d).\n",
195 dest_option, protocol_version);
196 exit_cleanup(RERR_PROTOCOL);
199 if (prune_empty_dirs) {
201 "--prune-empty-dirs requires protocol 29 or higher"
202 " (negotiated %d).\n",
204 exit_cleanup(RERR_PROTOCOL);
206 } else if (protocol_version >= 30) {
207 if (recurse && allow_inc_recurse && !preserve_hard_links
208 && !delete_before && !delete_after && !delay_updates
209 && !prune_empty_dirs && !use_qsort)
211 need_messages_from_generator = 1;
214 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
215 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
216 if (!am_sender || protocol_version >= 30)
217 flags |= MATCHFLG_PERISHABLE;
218 parse_rule(&filter_list, partial_dir, flags, 0);
223 checksum_seed = time(NULL);
224 write_int(f_out, checksum_seed);
226 checksum_seed = read_int(f_in);