2 Copyright (C) Andrew Tridgell 1996
3 Copyright (C) Paul Mackerras 1996
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Compatibility routines for older rsync protocol versions.
28 int remote_protocol = 0;
32 extern int checksum_seed;
34 extern int protocol_version;
37 void setup_protocol(int f_out,int f_in)
39 if (remote_protocol == 0) {
41 remote_protocol = read_int(f_in);
42 write_int(f_out, protocol_version);
44 write_int(f_out, protocol_version);
45 remote_protocol = read_int(f_in);
47 if (protocol_version > remote_protocol)
48 protocol_version = remote_protocol;
52 rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
53 am_server? "Server" : "Client", remote_protocol, protocol_version);
55 if (remote_protocol < MIN_PROTOCOL_VERSION
56 || remote_protocol > MAX_PROTOCOL_VERSION) {
57 rprintf(FERROR,"protocol version mismatch - is your shell clean?\n");
58 rprintf(FERROR,"(see the rsync man page for an explanation)\n");
59 exit_cleanup(RERR_PROTOCOL);
61 if (remote_protocol < OLD_PROTOCOL_VERSION) {
62 rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
63 am_server? "Client" : "Server");
65 if (protocol_version < MIN_PROTOCOL_VERSION) {
66 rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
67 MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
68 exit_cleanup(RERR_PROTOCOL);
70 if (protocol_version > PROTOCOL_VERSION) {
71 rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
72 PROTOCOL_VERSION, am_server? "Server" : "Client");
73 exit_cleanup(RERR_PROTOCOL);
78 checksum_seed = time(NULL);
79 write_int(f_out, checksum_seed);
81 checksum_seed = read_int(f_in);