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 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 char *files_from;
58 extern char *filesfrom_host;
59 extern struct filter_list_struct filter_list;
61 extern char *iconv_opt;
62 extern iconv_t ic_send, ic_recv;
65 /* These index values are for the file-list's extra-attribute array. */
66 int uid_ndx, gid_ndx, acls_ndx, xattrs_ndx;
70 int filesfrom_convert = 0;
73 /* The server makes sure that if either side only supports a pre-release
74 * version of a protocol, that both sides must speak a compatible version
75 * of that protocol for it to be advertised as available. */
76 static void check_sub_protocol(void)
79 int their_protocol, their_sub;
80 #if SUBPROTOCOL_VERSION != 0
81 int our_sub = protocol_version < PROTOCOL_VERSION ? 0 : SUBPROTOCOL_VERSION;
86 if (!shell_cmd || !(dot = strchr(shell_cmd, '.'))
87 || !(their_protocol = atoi(shell_cmd))
88 || !(their_sub = atoi(dot+1))) {
89 #if SUBPROTOCOL_VERSION != 0
96 if (their_protocol < protocol_version) {
98 protocol_version = their_protocol - 1;
102 if (their_protocol > protocol_version)
103 their_sub = 0; /* 0 == final version of older protocol */
104 if (their_sub != our_sub)
108 void setup_protocol(int f_out,int f_in)
111 file_extra_cnt += PTR_EXTRA_LEN;
115 uid_ndx = ++file_extra_cnt;
117 gid_ndx = ++file_extra_cnt;
118 if (preserve_acls && !am_sender)
119 acls_ndx = ++file_extra_cnt;
121 xattrs_ndx = ++file_extra_cnt;
123 if (iconv_opt && (!am_sender || inc_recurse))
124 ic_ndx = ++file_extra_cnt;
127 if (remote_protocol == 0) {
128 if (am_server && !local_server)
129 check_sub_protocol();
131 write_int(f_out, protocol_version);
132 remote_protocol = read_int(f_in);
133 if (protocol_version > remote_protocol)
134 protocol_version = remote_protocol;
136 if (read_batch && remote_protocol > protocol_version) {
137 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
138 remote_protocol, protocol_version);
139 exit_cleanup(RERR_PROTOCOL);
143 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
144 am_server? "Server" : "Client", remote_protocol, protocol_version);
146 if (remote_protocol < MIN_PROTOCOL_VERSION
147 || remote_protocol > MAX_PROTOCOL_VERSION) {
148 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
149 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
150 exit_cleanup(RERR_PROTOCOL);
152 if (remote_protocol < OLD_PROTOCOL_VERSION) {
153 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
154 am_server? "Client" : "Server");
156 if (protocol_version < MIN_PROTOCOL_VERSION) {
157 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
158 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
159 exit_cleanup(RERR_PROTOCOL);
161 if (protocol_version > PROTOCOL_VERSION) {
162 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
163 PROTOCOL_VERSION, am_server? "Server" : "Client");
164 exit_cleanup(RERR_PROTOCOL);
167 if (protocol_version < 30) {
168 if (append_mode == 1)
170 if (preserve_acls && !local_server) {
172 "--acls requires protocol 30 or higher"
173 " (negotiated %d).\n",
175 exit_cleanup(RERR_PROTOCOL);
177 if (preserve_xattrs && !local_server) {
179 "--xattrs requires protocol 30 or higher"
180 " (negotiated %d).\n",
182 exit_cleanup(RERR_PROTOCOL);
186 if (delete_mode && !(delete_before+delete_during+delete_after)) {
187 if (protocol_version < 30)
193 if (protocol_version < 29) {
196 "--fuzzy requires protocol 29 or higher"
197 " (negotiated %d).\n",
199 exit_cleanup(RERR_PROTOCOL);
202 if (basis_dir_cnt && inplace) {
204 "%s with --inplace requires protocol 29 or higher"
205 " (negotiated %d).\n",
206 dest_option, protocol_version);
207 exit_cleanup(RERR_PROTOCOL);
210 if (basis_dir_cnt > 1) {
212 "Using more than one %s option requires protocol"
213 " 29 or higher (negotiated %d).\n",
214 dest_option, protocol_version);
215 exit_cleanup(RERR_PROTOCOL);
218 if (prune_empty_dirs) {
220 "--prune-empty-dirs requires protocol 29 or higher"
221 " (negotiated %d).\n",
223 exit_cleanup(RERR_PROTOCOL);
225 } else if (protocol_version >= 30) {
226 if (recurse && allow_inc_recurse
227 && !delete_before && !delete_after && !delay_updates
228 && !use_qsort && !prune_empty_dirs)
230 need_messages_from_generator = 1;
233 if (partial_dir && *partial_dir != '/' && (!am_server || local_server)) {
234 int flags = MATCHFLG_NO_PREFIXES | MATCHFLG_DIRECTORY;
235 if (!am_sender || protocol_version >= 30)
236 flags |= MATCHFLG_PERISHABLE;
237 parse_rule(&filter_list, partial_dir, flags, 0);
242 if (protect_args && files_from) {
244 filesfrom_convert = filesfrom_host && ic_send != (iconv_t)-1;
246 filesfrom_convert = !filesfrom_host && ic_recv != (iconv_t)-1;
252 checksum_seed = time(NULL);
253 write_int(f_out, checksum_seed);
255 checksum_seed = read_int(f_in);