| 1 | /* |
| 2 | * Compatibility routines for older rsync protocol versions. |
| 3 | * |
| 4 | * Copyright (C) Andrew Tridgell 1996 |
| 5 | * Copyright (C) Paul Mackerras 1996 |
| 6 | * Copyright (C) 2004, 2005, 2006, 2007 Wayne Davison |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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. |
| 21 | */ |
| 22 | |
| 23 | #include "rsync.h" |
| 24 | |
| 25 | int remote_protocol = 0; |
| 26 | int file_extra_cnt = 0; /* count of file-list extras that everyone gets */ |
| 27 | int inc_recurse = 0; |
| 28 | |
| 29 | extern int verbose; |
| 30 | extern int am_server; |
| 31 | extern int am_sender; |
| 32 | extern int inplace; |
| 33 | extern int recurse; |
| 34 | extern int fuzzy_basis; |
| 35 | extern int read_batch; |
| 36 | extern int max_delete; |
| 37 | extern int delay_updates; |
| 38 | extern int checksum_seed; |
| 39 | extern int basis_dir_cnt; |
| 40 | extern int prune_empty_dirs; |
| 41 | extern int protocol_version; |
| 42 | extern int preserve_uid; |
| 43 | extern int preserve_gid; |
| 44 | extern int preserve_hard_links; |
| 45 | extern int need_messages_from_generator; |
| 46 | extern int delete_mode, delete_before, delete_during, delete_after; |
| 47 | extern char *dest_option; |
| 48 | |
| 49 | void setup_protocol(int f_out,int f_in) |
| 50 | { |
| 51 | if (am_sender) |
| 52 | file_extra_cnt += PTR_EXTRA_LEN; |
| 53 | else |
| 54 | file_extra_cnt++; |
| 55 | if (preserve_uid) |
| 56 | preserve_uid = ++file_extra_cnt; |
| 57 | if (preserve_gid) |
| 58 | preserve_gid = ++file_extra_cnt; |
| 59 | |
| 60 | if (remote_protocol == 0) { |
| 61 | if (!read_batch) |
| 62 | write_int(f_out, protocol_version); |
| 63 | remote_protocol = read_int(f_in); |
| 64 | if (protocol_version > remote_protocol) |
| 65 | protocol_version = remote_protocol; |
| 66 | } |
| 67 | if (read_batch && remote_protocol > protocol_version) { |
| 68 | rprintf(FERROR, "The protocol version in the batch file is too new (%d > %d).\n", |
| 69 | remote_protocol, protocol_version); |
| 70 | exit_cleanup(RERR_PROTOCOL); |
| 71 | } |
| 72 | |
| 73 | if (verbose > 3) { |
| 74 | rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n", |
| 75 | am_server? "Server" : "Client", remote_protocol, protocol_version); |
| 76 | } |
| 77 | if (remote_protocol < MIN_PROTOCOL_VERSION |
| 78 | || remote_protocol > MAX_PROTOCOL_VERSION) { |
| 79 | rprintf(FERROR,"protocol version mismatch -- is your shell clean?\n"); |
| 80 | rprintf(FERROR,"(see the rsync man page for an explanation)\n"); |
| 81 | exit_cleanup(RERR_PROTOCOL); |
| 82 | } |
| 83 | if (remote_protocol < OLD_PROTOCOL_VERSION) { |
| 84 | rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n", |
| 85 | am_server? "Client" : "Server"); |
| 86 | } |
| 87 | if (protocol_version < MIN_PROTOCOL_VERSION) { |
| 88 | rprintf(FERROR, "--protocol must be at least %d on the %s.\n", |
| 89 | MIN_PROTOCOL_VERSION, am_server? "Server" : "Client"); |
| 90 | exit_cleanup(RERR_PROTOCOL); |
| 91 | } |
| 92 | if (protocol_version > PROTOCOL_VERSION) { |
| 93 | rprintf(FERROR, "--protocol must be no more than %d on the %s.\n", |
| 94 | PROTOCOL_VERSION, am_server? "Server" : "Client"); |
| 95 | exit_cleanup(RERR_PROTOCOL); |
| 96 | } |
| 97 | |
| 98 | if (protocol_version < 30) { |
| 99 | if (max_delete == 0 && am_sender) { |
| 100 | rprintf(FERROR, |
| 101 | "--max-delete=0 requires protocol 30 or higher" |
| 102 | " (negotiated %d).\n", |
| 103 | protocol_version); |
| 104 | exit_cleanup(RERR_PROTOCOL); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | if (delete_mode && !(delete_before+delete_during+delete_after)) { |
| 109 | if (protocol_version < 30) |
| 110 | delete_before = 1; |
| 111 | else |
| 112 | delete_during = 1; |
| 113 | } |
| 114 | |
| 115 | if (protocol_version < 29) { |
| 116 | if (fuzzy_basis) { |
| 117 | rprintf(FERROR, |
| 118 | "--fuzzy requires protocol 29 or higher" |
| 119 | " (negotiated %d).\n", |
| 120 | protocol_version); |
| 121 | exit_cleanup(RERR_PROTOCOL); |
| 122 | } |
| 123 | |
| 124 | if (basis_dir_cnt && inplace) { |
| 125 | rprintf(FERROR, |
| 126 | "%s with --inplace requires protocol 29 or higher" |
| 127 | " (negotiated %d).\n", |
| 128 | dest_option, protocol_version); |
| 129 | exit_cleanup(RERR_PROTOCOL); |
| 130 | } |
| 131 | |
| 132 | if (basis_dir_cnt > 1) { |
| 133 | rprintf(FERROR, |
| 134 | "Using more than one %s option requires protocol" |
| 135 | " 29 or higher (negotiated %d).\n", |
| 136 | dest_option, protocol_version); |
| 137 | exit_cleanup(RERR_PROTOCOL); |
| 138 | } |
| 139 | |
| 140 | if (prune_empty_dirs) { |
| 141 | rprintf(FERROR, |
| 142 | "--prune-empty-dirs requires protocol 29 or higher" |
| 143 | " (negotiated %d).\n", |
| 144 | protocol_version); |
| 145 | exit_cleanup(RERR_PROTOCOL); |
| 146 | } |
| 147 | } else if (protocol_version >= 30) { |
| 148 | if (recurse && !preserve_hard_links && !delete_before |
| 149 | && !delete_after && !delay_updates && !prune_empty_dirs) |
| 150 | inc_recurse = 1; |
| 151 | need_messages_from_generator = 1; |
| 152 | } |
| 153 | |
| 154 | if (am_server) { |
| 155 | if (!checksum_seed) |
| 156 | checksum_seed = time(NULL); |
| 157 | write_int(f_out, checksum_seed); |
| 158 | } else { |
| 159 | checksum_seed = read_int(f_in); |
| 160 | } |
| 161 | } |