/* $Id: barrierd.c,v 1.12 2001/08/13 20:55:24 garbled Exp $ */
/*
* Copyright (c) 1998, 1999, 2000
* Tim Rightnour. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Tim Rightnour.
* 4. The name of Tim Rightnour may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY TIM RIGHTNOUR ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL TIM RIGHTNOUR BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include <syslog.h>
#include <stdarg.h>
#include "../common/sockcommon.h"
#if !defined(lint) && defined(__NetBSD__)
__COPYRIGHT(
"@(#) Copyright (c) 1998, 1999, 2000\n\
Tim Rightnour. All rights reserved\n");
__RCSID("$Id: barrierd.c,v 1.12 2001/08/13 20:55:24 garbled Exp $");
#endif
#define MAX_TOKENS 10
#define MAX_CLUSTER 512
int barrier_port, debug;
char *progname;
#ifndef __P
#define __P(protos) protos
#endif
int sleeper __P((void));
void log_bailout __P((int));
#ifndef __NetBSD__
char * strsep(char **stringp, const char *delim);
#endif
int
main(int argc, char *argv[])
{
extern char *optarg;
int ch;
barrier_port = 0;
while ((ch = getopt(argc, argv, "?p:")) != -1)
switch (ch) {
case 'p':
barrier_port = atoi(optarg);
break;
case '?':
(void)fprintf(stderr, "usage: barrierd [-p port]\n");
exit(EXIT_FAILURE);
break;
default:
break;
}
if (barrier_port == 0) {
if (getenv("BARRIER_PORT") != NULL)
barrier_port = atoi(getenv("BARRIER_PORT"));
else
barrier_port = BARRIER_SOCK;
}
return(sleeper());
}
int
sleeper(void)
{
fd_set active_fd_set, read_fd_set;
struct sockaddr_in clientname;
char *key, *buf;
char *tokens[MAX_TOKENS];
int i, k, l, m, found, sock;
size_t size;
int sizes[MAX_TOKENS];
int connections[MAX_TOKENS];
int sockets[MAX_TOKENS][MAX_CLUSTER];
#ifndef DEBUG
switch (fork()) {
case 0:
#endif
/* Create the socket and set it up to accept connections. */
sock = make_socket(barrier_port);
if (listen(sock, 1) < 0)
log_bailout(__LINE__);
for (l=0; l < MAX_TOKENS; l++) {
connections[l] = 0;
tokens[l] = NULL;
for (m=0; m < MAX_CLUSTER; m++)
sockets[l][m] = 0;
}
/* Initialize the set of active sockets. */
FD_ZERO(&active_fd_set);
FD_SET(sock, &active_fd_set);
#ifdef DEBUG
printf("Server going into wait mode, listening on port %d\n",
barrier_port);
#endif
while (1) {
/* Block until input arrives on one or more active sockets. */
read_fd_set = active_fd_set;
if (select(FD_SETSIZE, &read_fd_set, NULL, NULL, NULL) < 0)
log_bailout(__LINE__);
/* Service all the sockets with input pending. */
for (i = 0; i < FD_SETSIZE; ++i)
if (FD_ISSET (i, &read_fd_set)) {
if (i == sock) {
/* Connection request on original socket. */
int new;
size = sizeof(clientname);
new = accept(sock, (struct sockaddr *) &clientname,
&size);
if (new < 0)
log_bailout(__LINE__);
#ifdef DEBUG
(void)fprintf(stderr,
"Server: connect from host %s, port %hd.\n",
inet_ntoa(clientname.sin_addr),
ntohs(clientname.sin_port));
#endif
FD_SET(new, &active_fd_set);
if (read_from_client(new, &buf) > 0) {
key = (char *)strsep(&buf, " ");
found = 0;
for (k=0; (found == 0 && k < MAX_TOKENS); ) {
if (tokens[k] != NULL)
if (strcmp(tokens[k], key) == 0)
found = 1;
if (!found)
k++;
}
if (!found) /* we didn't find a matching token,
now make a new one */
for (k=0; (k < MAX_TOKENS && tokens[k] != NULL);
k++);
if (k > MAX_TOKENS - 1) {
(void)fprintf(stderr, "Server: too many "
"tokens. Disconnected host %s, "
"port %hd.\n",
inet_ntoa(clientname.sin_addr),
ntohs(clientname.sin_port));
write_to_client(new, "fail");
close(new);
FD_CLR(new, &active_fd_set);
} else {
for (l=0; sockets[k][l] != 0; l++)
;
if (l > MAX_CLUSTER - 1) {
(void)fprintf(stderr, "Server: too many "
"sockets on token. Disconnected "
"host %s, port %hd.\n",
inet_ntoa(clientname.sin_addr),
ntohs(clientname.sin_port));
write_to_client(new, "fail");
close(new);
FD_CLR(new, &active_fd_set);
} else {
sockets[k][l] = new;
tokens[k] = key;
sizes[k] = atoi(buf);
connections[k] += 1;
if (connections[k] == sizes[k]) {
l = connections[k];
for (m=0; m < l; m++) {
write_to_client(sockets[k][m],
"passed");
close(sockets[k][m]);
FD_CLR (sockets[k][m],
&active_fd_set);
sockets[k][m] = 0;
tokens[k] = NULL;
sizes[k] = 0;
connections[k] = 0;
} /* for */
} /* connections == sizes */
} /* too many sockets */
} /* too many tokens */
} /* data from client */
} /* i == sock */
} /* fd isset */
} /* infinate while */
#ifndef DEBUG
default:
exit(EXIT_SUCCESS);
break;
} /* switch */
#endif
}
/*ARGSUSED*/
void
log_bailout(line)
int line;
{
if (debug)
syslog(LOG_CRIT, "%s: Failed on line %d: %m %d", progname, line,
errno);
else
syslog(LOG_CRIT, "%s: Internal error, aborting: %m", progname);
_exit(EXIT_FAILURE);
}
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