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/*
Copyright (C) 2006 Renaissance Technologies Corp.
main developer: HP Wei <hp@rentec.com>
verision 3.0 major update
-- large file support
-- platform independence (between linux, unix)
-- backup feature (as in rsync)
-- removing meta-file-info
-- catching slow machine as the feedback monitor
-- mcast options
version 3.0.[1-9] bug fixes
-- logic flaw which under certain condition
caused premature dropout due to
unsuccessful EOF, CLOSE_FILE
and caused unwanranted SIT-OUT cases.
-- tested on Debian 64 bit arch by Nicolas Marot in France
version 3.1.0
-- codes for IPv6 are ready (but not tested)
IPv4 is tested ok.
version 3.2.0
-- monitor change improvement
-- handshake improvement (e.g. seq #)
-- if one machine skips a file, all will NOT close()
Copyright (C) 2005 Renaissance Technologies Corp.
Copyright (C) 2001 Renaissance Technologies Corp.
main developer: HP Wei <hp@rentec.com>
This file was modified in 2001 from files in the program
multicaster copyrighted by Aaron Hillegass as found at
<http://sourceforge.net/projects/multicaster/>
Copyright (C) 2000 Aaron Hillegass <aaron@classmax.com>
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, 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; see the file COPYING.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "main.h"
extern int machineID;
extern int verbose;
extern int isMonitor;
extern char * baseDir;
extern char * cmd_name[];
extern char * backup_suffix;
char * my_MCAST_ADDR = MCAST_ADDR;
char * my_IFname = MCAST_IF;
int my_FLOW_PORT = FLOW_PORT;
int my_PORT = PORT;
void usage()
{
fprintf(stderr,
"multicatcher (to receive files from multicaster) version %s\n"
" Option list:\n"
" [ -v <verbose_level 0-2> ]\n"
" -------- essential options ----------------------------------\n"
" -t <destination Dirpath>\n"
" -i <machineID 0 originated id numbers>\n"
" -------- options for backup ---------------------------------\n"
" [ -u <suffix> for backup files if -b is on in multicaster ]\n"
" -------- mcast options --------------------------------------\n"
" [ -A <my_mcast_address default=%s)> **same as for multicaster ]\n"
" [ -P <my_PORT default=%d> **same as for multicaster ]\n"
" [ -I <my_MCAST_IF default=NULL> ]\n",
VERSION, MCAST_ADDR, PORT);
}
int main(int argc, char *argv[])
{
int old_mode; /* hp: from char to int for mode */
int mode;
int c;
while ((c = getopt(argc, argv, "v:A:P:t:i:u:I:")) != EOF) {
switch (c) {
case 'v':
verbose = atoi(optarg);
break;
case 'A':
my_MCAST_ADDR = optarg;
break;
case 'P':
my_PORT = atoi(optarg);
my_FLOW_PORT = my_PORT -1;
break;
case 'I':
my_IFname = optarg;
break;
case 't':
baseDir = optarg;
break;
case 'i':
machineID = atoi(optarg);
break;
case 'u':
backup_suffix = strdup(optarg);
break;
case '?':
usage();
exit(BAD_EXIT);
}
}
if (machineID < 0 || !baseDir) {
fprintf(stderr, "Essential options (-t -i) should be specified. \n");
usage();
exit(BAD_EXIT);
}
fprintf(stderr, "my_pid= %lu\n", getpid());
if (!backup_suffix) default_suffix();
get_tmp_suffix(); /* get a unique tmp_name for the tmp file */
init_page_reader();
init_complaint_sender();
/* initialize random numbers */
srand(time(NULL) + getpid());
/* set the timeout for readable() to be about 3 to 6 seconds
Actually, this setting is arbitrary.
The timeout of readable() does not play a role in
the logic flow.
*/
set_delay( 3 + rand() % 6, 0);
mode = old_mode = TEST;
/* -----------------------The main loop---------------------------
Multicatcher simply waits for any incoming UDP,
reads and handles it.
If the UDP contains file content, it is placed in the right place.
If the UDP contains an instruction, it is carried out.
Multicatcher never complains unless being told so.
For example, as it is now, multicatcher does not complain
about the rate of incoming UDP being too fast to handle.
If multicatcher cannot keep up with the speed, it just
loses certain pages in a file which will be reported
later when multicaster requests acknowledgement.
---------------------------------------------------------------- */
while(1) { /* loop for all incoming pages */
if (verbose>=2)
fprintf(stderr, "Starting listen loop with mode %d, old_mode = %d\n", mode, old_mode);
/* the major task here */
mode = read_handle_page();
if (verbose>=2) fprintf(stderr, "new page in mode %d\n", mode);
if (mode == ALL_DONE_CMD) break;
/* for debugging purpose */
if ((old_mode != mode)) {
if (verbose>=2 && mode <= 5) fprintf(stderr, "%s\n", cmd_name[mode]);
}
/* got no data? */
if (mode == TIMED_OUT) {
if (verbose>=2) fprintf(stderr, "*");
}
old_mode = mode;
} /* end of incoming page loop */
if (verbose>=1) fprintf(stderr, "Done!\n");
return 0;
}
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