Commit | Line | Data |
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4fe159a8 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
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. | |
18 | */ | |
19 | ||
d1f83bcc MP |
20 | /** |
21 | * @file compat.c | |
22 | * | |
23 | * Compatibility routines for older rsync protocol versions. | |
24 | **/ | |
4fe159a8 AT |
25 | |
26 | #include "rsync.h" | |
27 | ||
8a9709de WD |
28 | int remote_protocol = 0; |
29 | ||
aae43eb3 AT |
30 | extern int am_server; |
31 | ||
4fe159a8 AT |
32 | extern int preserve_links; |
33 | extern int preserve_perms; | |
34 | extern int preserve_devices; | |
35 | extern int preserve_uid; | |
36 | extern int preserve_gid; | |
37 | extern int preserve_times; | |
38 | extern int always_checksum; | |
aae43eb3 | 39 | extern int checksum_seed; |
4fe159a8 | 40 | |
8a9709de | 41 | extern int protocol_version; |
76076c4b | 42 | extern int verbose; |
4fe159a8 | 43 | |
4ea81244 WD |
44 | extern int read_batch; |
45 | extern int write_batch; | |
6902ed17 | 46 | |
aae43eb3 | 47 | void setup_protocol(int f_out,int f_in) |
4fe159a8 | 48 | { |
8a9709de | 49 | if (remote_protocol == 0) { |
13c5fc0e | 50 | if (am_server) { |
8a9709de WD |
51 | remote_protocol = read_int(f_in); |
52 | write_int(f_out, protocol_version); | |
13c5fc0e | 53 | } else { |
8a9709de WD |
54 | write_int(f_out, protocol_version); |
55 | remote_protocol = read_int(f_in); | |
13c5fc0e | 56 | } |
8a9709de WD |
57 | if (protocol_version > remote_protocol) |
58 | protocol_version = remote_protocol; | |
13c5fc0e | 59 | } |
aae43eb3 | 60 | |
8a9709de WD |
61 | if (verbose > 3) { |
62 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", | |
63 | am_server? "Server" : "Client", remote_protocol, protocol_version); | |
64 | } | |
65 | if (remote_protocol < MIN_PROTOCOL_VERSION | |
66 | || remote_protocol > MAX_PROTOCOL_VERSION) { | |
13c5fc0e | 67 | rprintf(FERROR,"protocol version mismatch - is your shell clean?\n"); |
d310a212 | 68 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
65417579 | 69 | exit_cleanup(RERR_PROTOCOL); |
8a9709de WD |
70 | } |
71 | if (remote_protocol < OLD_PROTOCOL_VERSION) { | |
1b2db7ae | 72 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
8a9709de WD |
73 | am_server? "Client" : "Server"); |
74 | } | |
75 | if (protocol_version < MIN_PROTOCOL_VERSION) { | |
76 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", | |
77 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
78 | exit_cleanup(RERR_PROTOCOL); | |
79 | } | |
80 | if (protocol_version > PROTOCOL_VERSION) { | |
81 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", | |
82 | PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
83 | exit_cleanup(RERR_PROTOCOL); | |
84 | } | |
1b2db7ae | 85 | |
bc63ae3f | 86 | if (am_server) { |
b1bf649c | 87 | if (!checksum_seed) |
13c5fc0e | 88 | checksum_seed = time(NULL); |
b1bf649c | 89 | write_int(f_out, checksum_seed); |
bc63ae3f S |
90 | } else { |
91 | checksum_seed = read_int(f_in); | |
13c5fc0e | 92 | } |
4fe159a8 | 93 | } |