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https://github.com/RsyncProject/rsync.git
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94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/*
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Copyright (C) Andrew Tridgell 1996
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Copyright (C) Paul Mackerras 1996
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/**
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* @file compat.c
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*
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* Compatibility routines for older rsync protocol versions.
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**/
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#include "rsync.h"
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int remote_protocol = 0;
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extern int am_server;
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extern int preserve_links;
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extern int preserve_perms;
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extern int preserve_devices;
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extern int preserve_uid;
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extern int preserve_gid;
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extern int preserve_times;
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extern int always_checksum;
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extern int checksum_seed;
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extern int protocol_version;
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extern int verbose;
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extern int read_batch;
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extern int write_batch;
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void setup_protocol(int f_out,int f_in)
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{
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if (remote_protocol == 0) {
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if (am_server) {
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remote_protocol = read_int(f_in);
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write_int(f_out, protocol_version);
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} else {
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write_int(f_out, protocol_version);
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remote_protocol = read_int(f_in);
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}
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if (protocol_version > remote_protocol)
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protocol_version = remote_protocol;
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}
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if (verbose > 3) {
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rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
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am_server? "Server" : "Client", remote_protocol, protocol_version);
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}
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if (remote_protocol < MIN_PROTOCOL_VERSION
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|| remote_protocol > MAX_PROTOCOL_VERSION) {
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rprintf(FERROR,"protocol version mismatch - is your shell clean?\n");
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rprintf(FERROR,"(see the rsync man page for an explanation)\n");
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exit_cleanup(RERR_PROTOCOL);
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}
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if (remote_protocol < OLD_PROTOCOL_VERSION) {
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rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
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am_server? "Client" : "Server");
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}
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if (protocol_version < MIN_PROTOCOL_VERSION) {
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rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
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MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
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exit_cleanup(RERR_PROTOCOL);
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}
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if (protocol_version > PROTOCOL_VERSION) {
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rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
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PROTOCOL_VERSION, am_server? "Server" : "Client");
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exit_cleanup(RERR_PROTOCOL);
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}
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if (am_server) {
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if (!checksum_seed)
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checksum_seed = time(NULL);
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write_int(f_out, checksum_seed);
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} else {
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checksum_seed = read_int(f_in);
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}
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}
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