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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 | ||
b9f592fb | 30 | extern int verbose; |
aae43eb3 | 31 | extern int am_server; |
b9f592fb WD |
32 | extern int am_sender; |
33 | extern int read_batch; | |
aae43eb3 | 34 | extern int checksum_seed; |
8a9709de | 35 | extern int protocol_version; |
4fe159a8 | 36 | |
aae43eb3 | 37 | void setup_protocol(int f_out,int f_in) |
4fe159a8 | 38 | { |
8a9709de | 39 | if (remote_protocol == 0) { |
aa434321 | 40 | if (!read_batch) |
8a9709de | 41 | write_int(f_out, protocol_version); |
aa434321 | 42 | remote_protocol = read_int(f_in); |
8a9709de WD |
43 | if (protocol_version > remote_protocol) |
44 | protocol_version = remote_protocol; | |
13c5fc0e | 45 | } |
b9f592fb WD |
46 | if (read_batch && remote_protocol > protocol_version) { |
47 | rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n", | |
48 | remote_protocol, protocol_version); | |
49 | exit_cleanup(RERR_PROTOCOL); | |
50 | } | |
aae43eb3 | 51 | |
8a9709de WD |
52 | if (verbose > 3) { |
53 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", | |
54 | am_server? "Server" : "Client", remote_protocol, protocol_version); | |
55 | } | |
56 | if (remote_protocol < MIN_PROTOCOL_VERSION | |
57 | || remote_protocol > MAX_PROTOCOL_VERSION) { | |
13c5fc0e | 58 | rprintf(FERROR,"protocol version mismatch - is your shell clean?\n"); |
d310a212 | 59 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
65417579 | 60 | exit_cleanup(RERR_PROTOCOL); |
8a9709de WD |
61 | } |
62 | if (remote_protocol < OLD_PROTOCOL_VERSION) { | |
1b2db7ae | 63 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
8a9709de WD |
64 | am_server? "Client" : "Server"); |
65 | } | |
66 | if (protocol_version < MIN_PROTOCOL_VERSION) { | |
67 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", | |
68 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
69 | exit_cleanup(RERR_PROTOCOL); | |
70 | } | |
71 | if (protocol_version > PROTOCOL_VERSION) { | |
72 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", | |
73 | PROTOCOL_VERSION, am_server? "Server" : "Client"); | |
74 | exit_cleanup(RERR_PROTOCOL); | |
75 | } | |
1b2db7ae | 76 | |
bc63ae3f | 77 | if (am_server) { |
b1bf649c | 78 | if (!checksum_seed) |
13c5fc0e | 79 | checksum_seed = time(NULL); |
b1bf649c | 80 | write_int(f_out, checksum_seed); |
bc63ae3f S |
81 | } else { |
82 | checksum_seed = read_int(f_in); | |
13c5fc0e | 83 | } |
4fe159a8 | 84 | } |