546 lines
10 KiB
C
546 lines
10 KiB
C
|
/*
|
||
|
|
*
|
||
|
|
* ===================================
|
||
|
|
* HARP | Host ATM Research Platform
|
||
|
|
* ===================================
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* This Host ATM Research Platform ("HARP") file (the "Software") is
|
||
|
|
* made available by Network Computing Services, Inc. ("NetworkCS")
|
||
|
|
* "AS IS". NetworkCS does not provide maintenance, improvements or
|
||
|
|
* support of any kind.
|
||
|
|
*
|
||
|
|
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
|
||
|
|
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
|
||
|
|
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
|
||
|
|
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
|
||
|
|
* In no event shall NetworkCS be responsible for any damages, including
|
||
|
|
* but not limited to consequential damages, arising from or relating to
|
||
|
|
* any use of the Software or related support.
|
||
|
|
*
|
||
|
|
* Copyright 1994-1998 Network Computing Services, Inc.
|
||
|
|
*
|
||
|
|
* Copies of this Software may be made, however, the above copyright
|
||
|
|
* notice must be reproduced on all copies.
|
||
|
|
*
|
||
|
|
* @(#) $Id: scspd.c,v 1.6 1998/08/21 18:08:25 johnc Exp $
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Server Cache Synchronization Protocol (SCSP) Support
|
||
|
|
* ----------------------------------------------------
|
||
|
|
*
|
||
|
|
* SCSP server daemon main line code
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef lint
|
||
|
|
static char *RCSid = "@(#) $Id: scspd.c,v 1.6 1998/08/21 18:08:25 johnc Exp $";
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <sys/param.h>
|
||
|
|
|
||
|
|
#include <errno.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <string.h>
|
||
|
|
#include <syslog.h>
|
||
|
|
#include <sys/socket.h>
|
||
|
|
#include <net/if.h>
|
||
|
|
#include <netinet/in.h>
|
||
|
|
#include <sys/ttycom.h>
|
||
|
|
#include <netatm/queue.h>
|
||
|
|
#include <netatm/atm.h>
|
||
|
|
#include <netatm/atm_if.h>
|
||
|
|
#include <netatm/atm_sap.h>
|
||
|
|
#include <netatm/atm_sys.h>
|
||
|
|
#include <netatm/atm_ioctl.h>
|
||
|
|
|
||
|
|
#include <libatm.h>
|
||
|
|
#include "scsp_msg.h"
|
||
|
|
#include "scsp_if.h"
|
||
|
|
#include "scsp_var.h"
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Global variables
|
||
|
|
*/
|
||
|
|
char *prog;
|
||
|
|
char *scsp_config_file = SCSPD_CONFIG;
|
||
|
|
FILE *scsp_log_file = (FILE *)0;
|
||
|
|
int scsp_log_syslog = 0;
|
||
|
|
Scsp_server *scsp_server_head = (Scsp_server *)0;
|
||
|
|
Scsp_pending *scsp_pending_head = (Scsp_pending *)0;
|
||
|
|
int scsp_max_socket = -1;
|
||
|
|
int scsp_debug_mode = 0;
|
||
|
|
int scsp_trace_mode = 0;
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Local variables
|
||
|
|
*/
|
||
|
|
static int scsp_hup_signal = 0;
|
||
|
|
static int scsp_int_signal = 0;
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* SIGHUP signal handler
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
* sig signal number
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* none
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
scsp_sighup(sig)
|
||
|
|
int sig;
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* Flag the signal
|
||
|
|
*/
|
||
|
|
scsp_hup_signal = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* SIGINT signal handler
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
* sig signal number
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* none
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
scsp_sigint(sig)
|
||
|
|
int sig;
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* Flag the signal
|
||
|
|
*/
|
||
|
|
scsp_int_signal = 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Process command line parameters
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
* argc number of command-line arguments
|
||
|
|
* argv list of pointers to command-line arguments
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* none
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
void
|
||
|
|
initialize(argc, argv)
|
||
|
|
int argc;
|
||
|
|
char **argv;
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
char *cp;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Save program name, ignoring any path components
|
||
|
|
*/
|
||
|
|
if (prog = (char *)strrchr(argv[0], '/'))
|
||
|
|
prog++;
|
||
|
|
else
|
||
|
|
prog = argv[0];
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Make sure we're being invoked by the super user
|
||
|
|
*/
|
||
|
|
i = getuid();
|
||
|
|
if (i != 0) {
|
||
|
|
fprintf(stderr, "%s: You must be root to run this program\n",
|
||
|
|
prog);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check for command-line options
|
||
|
|
*/
|
||
|
|
for (i = 1; i < argc; i++) {
|
||
|
|
if (strcmp(argv[i], "-d") == 0) {
|
||
|
|
/*
|
||
|
|
* -d option -- set debug mode
|
||
|
|
*/
|
||
|
|
scsp_debug_mode = 1;
|
||
|
|
} else if (strcmp(argv[i], "-f") == 0) {
|
||
|
|
/*
|
||
|
|
* -f option -- set config file name
|
||
|
|
*/
|
||
|
|
i++;
|
||
|
|
if (i >= argc) {
|
||
|
|
fprintf(stderr, "%s: Configuration file name missing\n",
|
||
|
|
prog);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
scsp_config_file = argv[i];
|
||
|
|
} else if (strncmp(argv[i], "-T", 2) == 0) {
|
||
|
|
/*
|
||
|
|
* -T option -- trace options
|
||
|
|
*/
|
||
|
|
for (cp = &argv[i][2]; *cp; cp++) {
|
||
|
|
if (*cp == 'c')
|
||
|
|
scsp_trace_mode |= SCSP_TRACE_CAFSM;
|
||
|
|
else if (*cp == 'h')
|
||
|
|
scsp_trace_mode |= SCSP_TRACE_HFSM;
|
||
|
|
else if (*cp == 'i')
|
||
|
|
scsp_trace_mode |= SCSP_TRACE_CFSM;
|
||
|
|
else if (*cp == 'C')
|
||
|
|
scsp_trace_mode |= SCSP_TRACE_CA_MSG;
|
||
|
|
else if (*cp == 'H')
|
||
|
|
scsp_trace_mode |= SCSP_TRACE_HELLO_MSG;
|
||
|
|
else if (*cp == 'I')
|
||
|
|
scsp_trace_mode |= SCSP_TRACE_IF_MSG;
|
||
|
|
else
|
||
|
|
fprintf(stderr, "Invalid trace specification '%c' ignored\n",
|
||
|
|
*cp);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* Error -- unrecognized option
|
||
|
|
*/
|
||
|
|
fprintf(stderr, "%s: Unrecognized option \"%s\"\n",
|
||
|
|
prog, argv[i]);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Daemon housekeeping
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
* None
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* None
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
static void
|
||
|
|
start_daemon()
|
||
|
|
|
||
|
|
{
|
||
|
|
int dpid, fd, file_count, rc;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Ignore selected signals
|
||
|
|
*/
|
||
|
|
#ifdef SIGTTOU
|
||
|
|
signal(SIGTTOU, SIG_IGN);
|
||
|
|
#endif
|
||
|
|
#ifdef SIGTTIN
|
||
|
|
signal(SIGTTIN, SIG_IGN);
|
||
|
|
#endif
|
||
|
|
#ifdef SIGTSTP
|
||
|
|
signal(SIGTSTP, SIG_IGN);
|
||
|
|
#endif
|
||
|
|
#ifdef SIGPIPE
|
||
|
|
signal(SIGPIPE, SIG_IGN);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Don't put the daemon into the background if
|
||
|
|
* we're in debug mode
|
||
|
|
*/
|
||
|
|
if (scsp_debug_mode)
|
||
|
|
goto daemon_bypass;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Put the daemon into the background
|
||
|
|
*/
|
||
|
|
dpid = fork();
|
||
|
|
if (dpid < 0) {
|
||
|
|
scsp_log(LOG_ERR, "fork failed");
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
if (dpid > 0) {
|
||
|
|
/*
|
||
|
|
* This is the parent process--just exit and let
|
||
|
|
* the daughter do all the work
|
||
|
|
*/
|
||
|
|
exit(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Disassociate from any controlling terminal
|
||
|
|
*/
|
||
|
|
rc = setpgrp(0, getpid());
|
||
|
|
if (rc <0) {
|
||
|
|
scsp_log(LOG_ERR, "can't change process group");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
fd = open("/dev/tty", O_RDWR);
|
||
|
|
if (fd >= 0) {
|
||
|
|
ioctl(fd, TIOCNOTTY, (char *)0);
|
||
|
|
close(fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Close all open file descriptors
|
||
|
|
*/
|
||
|
|
file_count = getdtablesize();
|
||
|
|
for (fd=0; fd<file_count; fd++) {
|
||
|
|
close(fd);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set up timers
|
||
|
|
*/
|
||
|
|
daemon_bypass:
|
||
|
|
init_timer();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Move to a safe directory
|
||
|
|
*/
|
||
|
|
chdir(SCSPD_DIR);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Clear the file mode creation mask
|
||
|
|
*/
|
||
|
|
umask(0);
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set up signal handlers
|
||
|
|
*/
|
||
|
|
rc = (int)signal(SIGHUP, scsp_sighup);
|
||
|
|
if (rc == -1) {
|
||
|
|
scsp_log(LOG_ERR, "SIGHUP signal setup failed");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
rc = (int)signal(SIGINT, scsp_sigint);
|
||
|
|
if (rc == -1) {
|
||
|
|
scsp_log(LOG_ERR, "SIGINT signal setup failed");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set up syslog for error logging
|
||
|
|
*/
|
||
|
|
if (scsp_log_syslog || !scsp_log_file) {
|
||
|
|
openlog(prog, LOG_PID | LOG_CONS, LOG_DAEMON);
|
||
|
|
}
|
||
|
|
scsp_log(LOG_INFO, "Starting SCSP daemon");
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Main line code
|
||
|
|
*
|
||
|
|
* Process command line parameters, read configuration file, connect
|
||
|
|
* to configured clients, process data from DCSs.
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
* argc number of command-line arguments
|
||
|
|
* argv list of pointers to command-line arguments
|
||
|
|
*
|
||
|
|
* Returns:
|
||
|
|
* none
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
main(argc, argv)
|
||
|
|
int argc;
|
||
|
|
char *argv[];
|
||
|
|
|
||
|
|
{
|
||
|
|
int i, rc, scsp_server_lsock;
|
||
|
|
Scsp_server *ssp;
|
||
|
|
Scsp_dcs *dcsp;
|
||
|
|
Scsp_pending *next_psp, *psp;
|
||
|
|
fd_set read_set, write_set, except_set;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Process command line arguments
|
||
|
|
*/
|
||
|
|
initialize(argc, argv);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Put the daemon into the background
|
||
|
|
*/
|
||
|
|
start_daemon();
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Process configuration file
|
||
|
|
*/
|
||
|
|
rc = scsp_config(scsp_config_file);
|
||
|
|
if (rc) {
|
||
|
|
scsp_log(LOG_ERR, "Found %d error%s in configuration file",
|
||
|
|
rc, ((rc == 1) ? "" : "s"));
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Open the trace file if we need one
|
||
|
|
*/
|
||
|
|
if (scsp_trace_mode) {
|
||
|
|
scsp_open_trace();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Listen for connections from clients
|
||
|
|
*/
|
||
|
|
scsp_server_lsock = scsp_server_listen();
|
||
|
|
if (scsp_server_lsock == -1) {
|
||
|
|
scsp_log(LOG_ERR, "server listen failed");
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Main program loop -- we wait for:
|
||
|
|
* a server listen to complete
|
||
|
|
* a DCS listen to complete
|
||
|
|
* a DCS connect to complete
|
||
|
|
* data from a server
|
||
|
|
* data from a DCS
|
||
|
|
*/
|
||
|
|
while (1) {
|
||
|
|
/*
|
||
|
|
* Set up the file descriptor sets and select to wait
|
||
|
|
* for input
|
||
|
|
*/
|
||
|
|
FD_ZERO(&read_set);
|
||
|
|
FD_ZERO(&write_set);
|
||
|
|
FD_ZERO(&except_set);
|
||
|
|
FD_SET(scsp_server_lsock, &read_set);
|
||
|
|
for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
|
||
|
|
if (ssp->ss_dcs_lsock != -1)
|
||
|
|
FD_SET(ssp->ss_dcs_lsock, &read_set);
|
||
|
|
if (ssp->ss_sock != -1)
|
||
|
|
FD_SET(ssp->ss_sock, &read_set);
|
||
|
|
for (dcsp = ssp->ss_dcs; dcsp;
|
||
|
|
dcsp = dcsp->sd_next) {
|
||
|
|
if (dcsp->sd_sock != -1) {
|
||
|
|
if (dcsp->sd_hello_state ==
|
||
|
|
SCSP_HFSM_DOWN )
|
||
|
|
FD_SET(dcsp->sd_sock,
|
||
|
|
&write_set);
|
||
|
|
else
|
||
|
|
FD_SET(dcsp->sd_sock,
|
||
|
|
&read_set);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
for (psp = scsp_pending_head; psp; psp = psp->sp_next) {
|
||
|
|
FD_SET(psp->sp_sock, &read_set);
|
||
|
|
}
|
||
|
|
rc = select(scsp_max_socket + 1, &read_set,
|
||
|
|
&write_set, &except_set,
|
||
|
|
(struct timeval *)0);
|
||
|
|
if (rc < 0) {
|
||
|
|
/*
|
||
|
|
* Select error--check for possible signals
|
||
|
|
*/
|
||
|
|
if (harp_timer_exec) {
|
||
|
|
/*
|
||
|
|
* Timer tick--process it
|
||
|
|
*/
|
||
|
|
timer_proc();
|
||
|
|
continue;
|
||
|
|
} else if (scsp_hup_signal) {
|
||
|
|
/*
|
||
|
|
* SIGHUP signal--reconfigure
|
||
|
|
*/
|
||
|
|
scsp_hup_signal = 0;
|
||
|
|
scsp_reconfigure();
|
||
|
|
continue;
|
||
|
|
} else if (scsp_int_signal) {
|
||
|
|
/*
|
||
|
|
* SIGINT signal--dump control blocks
|
||
|
|
*/
|
||
|
|
print_scsp_dump();
|
||
|
|
scsp_int_signal = 0;
|
||
|
|
continue;
|
||
|
|
} else if (errno == EINTR) {
|
||
|
|
/*
|
||
|
|
* EINTR--just ignore it
|
||
|
|
*/
|
||
|
|
continue;
|
||
|
|
} else {
|
||
|
|
/*
|
||
|
|
* Other error--this is a problem
|
||
|
|
*/
|
||
|
|
scsp_log(LOG_ERR, "Select failed");
|
||
|
|
abort();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check the read set for connections from servers
|
||
|
|
*/
|
||
|
|
if (FD_ISSET(scsp_server_lsock, &read_set)) {
|
||
|
|
FD_CLR(scsp_server_lsock, &read_set);
|
||
|
|
rc = scsp_server_accept(scsp_server_lsock);
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check the write set for new connections to DCSs
|
||
|
|
*/
|
||
|
|
for (i = 0; i <= scsp_max_socket; i++) {
|
||
|
|
if (FD_ISSET(i, &write_set)) {
|
||
|
|
FD_CLR(i, &write_set);
|
||
|
|
if (dcsp = scsp_find_dcs(i)) {
|
||
|
|
rc = scsp_hfsm(dcsp,
|
||
|
|
SCSP_HFSM_VC_ESTAB,
|
||
|
|
(Scsp_msg *)0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check the read set for connections from DCSs
|
||
|
|
*/
|
||
|
|
for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
|
||
|
|
if (ssp->ss_dcs_lsock != -1 &&
|
||
|
|
FD_ISSET(ssp->ss_dcs_lsock,
|
||
|
|
&read_set)) {
|
||
|
|
FD_CLR(ssp->ss_dcs_lsock, &read_set);
|
||
|
|
dcsp = scsp_dcs_accept(ssp);
|
||
|
|
if (dcsp) {
|
||
|
|
rc = scsp_hfsm(dcsp,
|
||
|
|
SCSP_HFSM_VC_ESTAB,
|
||
|
|
(Scsp_msg *)0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check the read set for data from pending servers
|
||
|
|
*/
|
||
|
|
for (psp = scsp_pending_head; psp; psp = next_psp) {
|
||
|
|
next_psp = psp->sp_next;
|
||
|
|
if (FD_ISSET(psp->sp_sock, &read_set)) {
|
||
|
|
FD_CLR(psp->sp_sock, &read_set);
|
||
|
|
rc = scsp_pending_read(psp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Check the read set for data from servers or DCSs
|
||
|
|
*/
|
||
|
|
for (i = 0; i <= scsp_max_socket; i++) {
|
||
|
|
if (FD_ISSET(i, &read_set)) {
|
||
|
|
if (ssp = scsp_find_server(i)) {
|
||
|
|
rc = scsp_server_read(ssp);
|
||
|
|
} else if (dcsp = scsp_find_dcs(i)) {
|
||
|
|
rc = scsp_dcs_read(dcsp);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|