2 * Compatibility routines for older rsync protocol versions.
4 * Copyright (C) Andrew Tridgell 1996
5 * Copyright (C) Paul Mackerras 1996
6 * Copyright (C) 2004, 2005, 2006 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 2 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, write to the Free Software Foundation, Inc.,
20 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
25 int remote_protocol = 0;
26 int file_extra_cnt = 0; /* count of file-list extras that everyone gets */
32 extern int fuzzy_basis;
33 extern int read_batch;
34 extern int max_delete;
35 extern int checksum_seed;
36 extern int basis_dir_cnt;
37 extern int prune_empty_dirs;
38 extern int protocol_version;
39 extern int preserve_uid;
40 extern int preserve_gid;
41 extern char *dest_option;
43 void setup_protocol(int f_out,int f_in)
46 file_extra_cnt += PTR_EXTRA_LEN;
50 preserve_uid = ++file_extra_cnt;
52 preserve_gid = ++file_extra_cnt;
54 if (remote_protocol == 0) {
56 write_int(f_out, protocol_version);
57 remote_protocol = read_int(f_in);
58 if (protocol_version > remote_protocol)
59 protocol_version = remote_protocol;
61 if (read_batch && remote_protocol > protocol_version) {
62 rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n",
63 remote_protocol, protocol_version);
64 exit_cleanup(RERR_PROTOCOL);
68 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
69 am_server? "Server" : "Client", remote_protocol, protocol_version);
71 if (remote_protocol < MIN_PROTOCOL_VERSION
72 || remote_protocol > MAX_PROTOCOL_VERSION) {
73 rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n");
74 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
75 exit_cleanup(RERR_PROTOCOL);
77 if (remote_protocol < OLD_PROTOCOL_VERSION) {
78 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
79 am_server? "Client" : "Server");
81 if (protocol_version < MIN_PROTOCOL_VERSION) {
82 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
83 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
84 exit_cleanup(RERR_PROTOCOL);
86 if (protocol_version > PROTOCOL_VERSION) {
87 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
88 PROTOCOL_VERSION, am_server? "Server" : "Client");
89 exit_cleanup(RERR_PROTOCOL);
92 if (protocol_version < 30) {
93 if (max_delete == 0 && am_sender) {
95 "--max-delete=0 requires protocol 30 or higher"
96 " (negotiated %d).\n",
98 exit_cleanup(RERR_PROTOCOL);
102 if (protocol_version < 29) {
105 "--fuzzy requires protocol 29 or higher"
106 " (negotiated %d).\n",
108 exit_cleanup(RERR_PROTOCOL);
111 if (basis_dir_cnt && inplace) {
113 "%s with --inplace requires protocol 29 or higher"
114 " (negotiated %d).\n",
115 dest_option, protocol_version);
116 exit_cleanup(RERR_PROTOCOL);
119 if (basis_dir_cnt > 1) {
121 "Using more than one %s option requires protocol"
122 " 29 or higher (negotiated %d).\n",
123 dest_option, protocol_version);
124 exit_cleanup(RERR_PROTOCOL);
127 if (prune_empty_dirs) {
129 "--prune-empty-dirs requires protocol 29 or higher"
130 " (negotiated %d).\n",
132 exit_cleanup(RERR_PROTOCOL);
138 checksum_seed = time(NULL);
139 write_int(f_out, checksum_seed);
141 checksum_seed = read_int(f_in);