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/*
Copyright (C) Andrew Tridgell 1996
Copyright (C) Paul Mackerras 1996
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**
* @file compat.c
*
* Compatibility routines for older rsync protocol versions.
**/
#include "rsync.h"
int remote_protocol = 0;
extern int am_server;
extern int preserve_links;
extern int preserve_perms;
extern int preserve_devices;
extern int preserve_uid;
extern int preserve_gid;
extern int preserve_times;
extern int always_checksum;
extern int checksum_seed;
extern int protocol_version;
extern int verbose;
extern int read_batch;
extern int write_batch;
void setup_protocol(int f_out,int f_in)
{
if (remote_protocol == 0) {
if (am_server) {
remote_protocol = read_int(f_in);
write_int(f_out, protocol_version);
} else {
write_int(f_out, protocol_version);
remote_protocol = read_int(f_in);
}
if (protocol_version > remote_protocol)
protocol_version = remote_protocol;
}
if (verbose > 3) {
rprintf(FINFO, "(%s) Protocol versions: remote=%d, negotiated=%d\n",
am_server? "Server" : "Client", remote_protocol, protocol_version);
}
if (remote_protocol < MIN_PROTOCOL_VERSION
|| remote_protocol > MAX_PROTOCOL_VERSION) {
rprintf(FERROR,"protocol version mismatch - is your shell clean?\n");
rprintf(FERROR,"(see the rsync man page for an explanation)\n");
exit_cleanup(RERR_PROTOCOL);
}
if (remote_protocol < OLD_PROTOCOL_VERSION) {
rprintf(FINFO,"%s is very old version of rsync, upgrade recommended.\n",
am_server? "Client" : "Server");
}
if (protocol_version < MIN_PROTOCOL_VERSION) {
rprintf(FERROR, "--protocol must be at least %d on the %s.\n",
MIN_PROTOCOL_VERSION, am_server? "Server" : "Client");
exit_cleanup(RERR_PROTOCOL);
}
if (protocol_version > PROTOCOL_VERSION) {
rprintf(FERROR, "--protocol must be no more than %d on the %s.\n",
PROTOCOL_VERSION, am_server? "Server" : "Client");
exit_cleanup(RERR_PROTOCOL);
}
if (am_server) {
if (read_batch || write_batch)
checksum_seed = 32761;
else
checksum_seed = time(NULL);
write_int(f_out,checksum_seed);
} else {
checksum_seed = read_int(f_in);
}
}
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