| | 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 | |
| | 20 | /** |
| | 21 | * @file compat.c |
| | 22 | * |
| | 23 | * Compatibility routines for older rsync protocol versions. |
| | 24 | **/ |
| | 25 | |
| | 26 | #include "rsync.h" |
| | 27 | |
| | 28 | int remote_protocol = 0; |
| | 29 | |
| | 30 | extern int am_server; |
| | 31 | |
| | 32 | extern int checksum_seed; |
| | 33 | |
| | 34 | extern int protocol_version; |
| | 35 | extern int verbose; |
| | 36 | |
| | 37 | void setup_protocol(int f_out,int f_in) |
| | 38 | { |
| | 39 | if (remote_protocol == 0) { |
| | 40 | if (am_server) { |
| | 41 | remote_protocol = read_int(f_in); |
| | 42 | write_int(f_out, protocol_version); |
| | 43 | } else { |
| | 44 | write_int(f_out, protocol_version); |
| | 45 | remote_protocol = read_int(f_in); |
| | 46 | } |
| | 47 | if (protocol_version > remote_protocol) |
| | 48 | protocol_version = remote_protocol; |
| | 49 | } |
| | 50 | |
| | 51 | if (verbose > 3) { |
| | 52 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", |
| | 53 | am_server? "Server" : "Client", remote_protocol, protocol_version); |
| | 54 | } |
| | 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); |
| | 60 | } |
| | 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"); |
| | 64 | } |
| | 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); |
| | 69 | } |
| | 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); |
| | 74 | } |
| | 75 | |
| | 76 | if (am_server) { |
| | 77 | if (!checksum_seed) |
| | 78 | checksum_seed = time(NULL); |
| | 79 | write_int(f_out, checksum_seed); |
| | 80 | } else { |
| | 81 | checksum_seed = read_int(f_in); |
| | 82 | } |
| | 83 | } |
Matt McCutchen's Web Site / rsync / rsync.git / blame_incremental