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 3 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, visit the http://fsf.org website.
23 int remote_protocol = 0;
24 int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
30 extern int local_server;
34 extern int allow_inc_recurse;
35 extern int fuzzy_basis;
36 extern int read_batch;
37 extern int max_delete;
38 extern int delay_updates;
39 extern int checksum_seed;
40 extern int basis_dir_cnt;
41 extern int prune_empty_dirs;
42 extern int protocol_version;
43 extern int preserve_uid;
44 extern int preserve_gid;
45 extern int preserve_acls;
46 extern int preserve_xattrs;
47 extern int preserve_hard_links;
48 extern int need_messages_from_generator;
49 extern int delete_mode, delete_before, delete_during, delete_after;
50 extern int delete_excluded;
51 extern int make_backups;
52 extern char *shell_cmd; /* contains VER.SUB string if client is a pre-release */
53 extern char *backup_dir, *backup_suffix;
54 extern char *partial_dir;
55 extern char *dest_option;
56 extern struct filter_list_struct filter_list;
58 /* These index values are for the file-list's extra-attribute array. */
59 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx;
61 /* The server makes sure that if either side only supports a pre-release
62 * version of a protocol, that both sides must speak a compatible version
63 * of that protocol for it to be advertised as available. */
64 static void check_sub_protocol(void)
67 int their_protocol, their_sub;
68 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
70 if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
71 || !(their_protocol = atoi(shell_cmd))
72 || !(their_sub = atoi(dot+1))) {
78 if (their_protocol < protocol_version) {
80 protocol_version = their_protocol - 1;
84 if (their_protocol > protocol_version)
85 their_sub = 0; /* 0 == final version */
86 if (their_sub != our_sub)
90 void setup_protocol(int f_out,int f_in)
93 file_extra_cnt += PTR_EXTRA_LEN;
97 uid_ndx = ++file_extra_cnt;
99 gid_ndx = ++file_extra_cnt;
100 if (preserve_acls && !am_sender)
101 acls_ndx = ++file_extra_cnt;
103 xattrs_ndx = ++file_extra_cnt;
105 if (remote_protocol == 0) {
106 if (am_server && !local_server)
107 check_sub_protocol();
109 write_int(f_out, protocol_version);
110 remote_protocol = read_int(f_in);
111 if (protocol_version > remote_protocol)
112 protocol_version = remote_protocol;
114 if (read_batch && remote_protocol > protocol_version) {
115 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
116 remote_protocol, protocol_version);
117 exit_cleanup(RERR_PROTOCOL);
121 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
122 am_server? "Server" : "Client", remote_protocol, protocol_version);
124 if (remote_protocol < MIN_PROTOCOL_VERSION
125 || remote_protocol > MAX_PROTOCOL_VERSION) {
126 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
127 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
128 exit_cleanup(RERR_PROTOCOL);
130 if (remote_protocol < OLD_PROTOCOL_VERSION) {
131 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
132 am_server? "Client" : "Server");
134 if (protocol_version < MIN_PROTOCOL_VERSION) {
135 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
136 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
137 exit_cleanup(RERR_PROTOCOL);
139 if (protocol_version > PROTOCOL_VERSION) {
140 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
141 PROTOCOL_VERSION, am_server? "Server" : "Client");
142 exit_cleanup(RERR_PROTOCOL);
145 if (protocol_version < 30) {
146 if (max_delete == 0 && am_sender) {
148 "--max-delete=0 requires protocol 30 or higher"
149 " (negotiated %d).\n",
151 exit_cleanup(RERR_PROTOCOL);
153 if (preserve_acls && !local_server) {
155 "--acls requires protocol 30 or higher"
156 " (negotiated %d).\n",
158 exit_cleanup(RERR_PROTOCOL);
160 if (preserve_xattrs && !local_server) {
162 "--xattrs requires protocol 30 or higher"
163 " (negotiated %d).\n",
165 exit_cleanup(RERR_PROTOCOL);
169 if (delete_mode && !(delete_before+delete_during+delete_after)) {
170 if (protocol_version < 30)
176 if (protocol_version < 29) {
179 "--fuzzy requires protocol 29 or higher"
180 " (negotiated %d).\n",
182 exit_cleanup(RERR_PROTOCOL);
185 if (basis_dir_cnt && inplace) {
187 "%s with --inplace requires protocol 29 or higher"
188 " (negotiated %d).\n",
189 dest_option, protocol_version);
190 exit_cleanup(RERR_PROTOCOL);
193 if (basis_dir_cnt > 1) {
195 "Using more than one %s option requires protocol"
196 " 29 or higher (negotiated %d).\n",
197 dest_option, protocol_version);
198 exit_cleanup(RERR_PROTOCOL);
201 if (prune_empty_dirs) {
203 "--prune-empty-dirs requires protocol 29 or higher"
204 " (negotiated %d).\n",
206 exit_cleanup(RERR_PROTOCOL);
208 } else if (protocol_version >= 30) {
209 if (recurse && allow_inc_recurse && !preserve_hard_links
210 && !delete_before && !delete_after && !delay_updates
211 && !prune_empty_dirs && !use_qsort)
213 need_messages_from_generator = 1;
216 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
217 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
218 if (!am_sender || protocol_version >= 30)
219 flags |= MATCHFLG_PERISHABLE;
220 parse_rule(&filter_list, partial_dir, flags, 0);
225 checksum_seed = time(NULL);
226 write_int(f_out, checksum_seed);
228 checksum_seed = read_int(f_in);