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redund_main.c
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redund_main.c
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/*
* Copyright (C) 2001 Moxa Inc.
* All rights reserved.
*
* Moxa NPort/Async Server UNIX Real TTY daemon program.
*
* Usage: npreal2d_redund [-t reset-time]
*
*/
#include "np_ver.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <sys/param.h>
#include <netinet/in.h>
#include <netdb.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <time.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/sysinfo.h>
#ifdef STREAM
#include <sys/ptms.h>
#endif
#ifdef SSL_ON
#include <openssl/ssl.h>
#endif
#include <resolv.h> // for res_init()
#include <arpa/inet.h>
#include "redund.h"
#include "npreal2d.h"
//#include "misc.h"
void _log_event_backup(char *log_pathname, char *msg);
int ipv4_str_to_ip(char *str, ulong *ip);
int ipv6_str_to_ip(char *str, unsigned char *ip);
#define DNS_NAME_RESOLVE 1
/* The mode which daemon will be waken up */
int Graw_mode = 0;
int Gredund_mode = 0;
int ttys, servers;
TTYINFO ttys_info[MAX_TTYS]; /* tty info which is initiated by reading from configuration. */
SERVINFO serv_info[MAX_TTYS];
char EventLog[160]; /* Event log file name */
int pipefd[2];
int maxfd;
int timeout_time = 0;
int polling_time=0; /* default disable polling function */
int polling_fd;
int polling_nport_fd[2];
int Restart_daemon;
static int No_tty_defined;
static int enable_ipv6=1; /*2 enable ipv6, 1 disenable ipv6*/
#define EN_IPV6 2
#define DIS_IPV6 1
#ifdef STREAM
extern char *ptsname();
#endif
#ifdef SSL_ON
static void ssl_init(void);
SSL_CTX *sslc_ctx;
#endif
#ifndef STREAM
void restart_handle ();
void wait_handle ();
void connect_wait_handle ();
#endif
#ifdef STREAM
void restart_handle (int);
void wait_handle (int);
void connect_wait_handle (int);
#endif
int poll_async_server_init();
void moxattyd_daemon_start();
int moxattyd_read_config(char *cmdpath);
/*
* MOXA TTY daemon main program
*/
void main(argc, argv)
int argc;
char * argv[];
{
TTYINFO * infop;
char ver[100];
int i;
Restart_daemon = 0;
No_tty_defined = 0;
polling_fd = -1; /* Add by Ying */
for(i=0; i<2; i++)
polling_nport_fd[i] = -1;
while (1)
{
if (Restart_daemon)
{
/* Add by Ying */
if (polling_fd >= 0)
{
close(polling_fd);
polling_fd = -1;
}
for(i=0; i<2; i++)
{
if (polling_nport_fd[i] >= 0)
{
close(polling_nport_fd[i]);
polling_nport_fd[i] = -1;
}
}
/* */
infop = ttys_info;
// close (pipefd[0]);
// close (pipefd[1]);
for (i = 0;i < ttys;i++)
{
infop->reconn_flag = 1;
if (infop->sock_fd >= 0)
{
#ifdef SSL_ON
if (infop->ssl_enable)
{
SSL_shutdown(infop->pssl);
SSL_free(infop->pssl);
infop->pssl = NULL;
}
#endif
close(infop->sock_fd);
}
if (infop->sock_cmd_fd >= 0)
close(infop->sock_cmd_fd);
if (infop->mpt_fd >= 0)
close(infop->mpt_fd);
infop++;
close(infop->pipe_port[0]);
close(infop->pipe_port[1]);
}
} /* if (Restart_daemon) */
if (Restart_daemon == 1)
{
#ifndef STREAM
signal (SIGTERM, ( (void (*)()) wait_handle) );
#endif
#ifdef STREAM
signal (SIGTERM, wait_handle);
#endif
pause();
} /* if (Restart_daemon == 1) */
/*
* Read the poll time & the pesudo TTYs configuation file.
*/
if ( (argc > 2) && (strcmp(argv[1], "-t") == 0) )
{
// The unit of -t is minute.
timeout_time = 60 * atoi(argv[2]);
polling_time = timeout_time;
if ( polling_time >= 60 )
{
polling_time = (polling_time - 20) / 4;
}
}
if ( moxattyd_read_config(argv[0]) <= 0 )
{
if (!No_tty_defined)
{
log_event ("Not any tty defined");
No_tty_defined = 1;
}
break;
// usleep(1000);
// continue;
}
No_tty_defined = 0;
/*
* Initialize this Moxa TTYs daemon process.
*/
if (!Restart_daemon)
moxattyd_daemon_start();
/*
* Initialize polling async server function.
*/
if ( polling_time && (poll_async_server_init() < 0) )
{
continue;
}
/*
* Open PIPE, set read to O_NDELAY mode.
*/
//
infop = ttys_info;
for (i = 0;i < ttys;i++) {
if ( pipe(infop->pipe_port) < 0 )
{
log_event("pipe error !");
continue;
}
#ifdef O_NDELAY
fcntl(infop->pipe_port[0], F_SETFL, fcntl(infop->pipe_port[0], F_GETFL) | O_NDELAY);
#endif
infop++;
}
signal(SIGCLD, SIG_IGN); /* Ignore signal if child process terminate. */
Restart_daemon = 0;
sprintf(ver, "MOXA Real TTY daemon program starting (%s %s)...", NPREAL_VERSION, NPREAL_BUILD);
log_event(ver);
#ifndef STREAM
signal (SIGTERM, ( (void (*)())restart_handle) );
#endif
#ifdef STREAM
signal (SIGTERM, restart_handle);
#endif
/*
* Handle Moxa TTYs data communication.
*/
#ifdef SSL_ON
ssl_init();
#endif
if (Gredund_mode)
redund_handle_ttys(); /* child process ok */
}
}
int resolve_dns_host_name(infop)
TTYINFO *infop;
{
int ret;
struct addrinfo *result = NULL, *rp;
struct addrinfo hints;
struct sockaddr_in *ipv4;
struct sockaddr_in6 *ipv6;
char msg[255]={0};
ulong addr_ipv4;
u_char addr_ipv6[16];
int ret1 = NP_RET_SUCCESS;
int ret2 = NP_RET_SUCCESS;
do{
if( ipv4_str_to_ip(infop->ip_addr_s, &addr_ipv4)==NP_RET_SUCCESS ){
*(ulong*)infop->ip6_addr = addr_ipv4;
infop->af = AF_INET;
ret1 = NP_RET_SUCCESS;
break;
} else if(ipv6_str_to_ip(infop->ip_addr_s, addr_ipv6)==NP_RET_SUCCESS ) {
memcpy(infop->ip6_addr, addr_ipv6, sizeof(infop->ip6_addr));
infop->af = AF_INET6;
ret1 = NP_RET_SUCCESS;
break;
}
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
hints.ai_socktype = SOCK_STREAM; /* Datagram socket */
hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */
ret = getaddrinfo(infop->ip_addr_s, NULL, &hints, &result);
if( ret==EAI_AGAIN || ret==EAI_NONAME ){
// Sometimes, this error occurred. It means DNS server or DNS configuration are wrong temporarily.
sleep(1);
res_init(); // init name resolver again!
ret = getaddrinfo(infop->ip_addr_s, NULL, &hints, &result);
if (ret != 0) {
sprintf(msg, "getaddrinfo: %s @ %d, %s\n", gai_strerror(ret), __LINE__, __FUNCTION__);
log_event(msg);
ret1 = NP_RET_ERROR;
break;
}
}
memset(infop->ip6_addr, 0, sizeof(infop->ip6_addr));
for (rp = result; rp != NULL; rp = rp->ai_next) {
if(rp->ai_family == AF_INET)
{
ipv4 = (struct sockaddr_in *)rp->ai_addr;
*(ulong*)infop->ip6_addr = ((struct in_addr *)&ipv4->sin_addr)->s_addr;
infop->af = AF_INET;
// IPv4 address is translated.
//{
// char ipAddress[INET_ADDRSTRLEN];
// inet_ntop(AF_INET, &(ipv4->sin_addr), ipAddress, INET_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
} else if(rp->ai_family == AF_INET6)
{
ipv6 = (struct sockaddr_in6 *)rp->ai_addr;
memcpy(infop->ip6_addr, ((struct in6_addr *)&ipv6->sin6_addr)->s6_addr, 16);
infop->af = AF_INET6;
//{
// char ipAddress[INET6_ADDRSTRLEN];
// inet_ntop(AF_INET6, &(ipv6->sin6_addr), ipAddress, INET6_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
}
}
freeaddrinfo(result); /* No longer needed */
if (rp == NULL) { /* No address succeeded */
sprintf(msg, "No available host is found. @ %d, %s\n", __LINE__, __FUNCTION__);
log_event(msg);
ret1 = NP_RET_ERROR;
break;
}
} while(0);
while(infop->redundant_mode) {
if( ipv4_str_to_ip(infop->redund.redund_ip, &addr_ipv4)==NP_RET_SUCCESS ){
*(u_long*)infop->redund.ip6_addr = addr_ipv4;
//{
// char ipAddress[INET_ADDRSTRLEN];
// inet_ntop(AF_INET, &(addr_ipv4), ipAddress, INET_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
ret2 = NP_RET_SUCCESS;
break;
} else if(ipv6_str_to_ip(infop->redund.redund_ip, addr_ipv6)==NP_RET_SUCCESS ) {
memcpy(infop->redund.ip6_addr, addr_ipv6, sizeof(infop->redund.ip6_addr));
ret2 = NP_RET_SUCCESS;
break;
}
hints.ai_family = AF_INET; /* Allow IPv4 or IPv6 */
ret = getaddrinfo(infop->redund.redund_ip, NULL, &hints, &result);
if( ret==EAI_AGAIN || ret==EAI_NONAME ){
// Sometimes, this error occurred. It means DNS server or DNS configuration are wrong temporarily.
sleep(1);
res_init(); // init name resolver again!
ret = getaddrinfo(infop->redund.redund_ip, NULL, &hints, &result);
if (ret != 0) {
sprintf(msg, "getaddrinfo: %s @ %d, %s\n", gai_strerror(ret), __LINE__, __FUNCTION__);
log_event(msg);
ret2 = NP_RET_ERROR;
}
}
*(ulong*)infop->redund.redund_ip = 0;
memset(infop->redund.ip6_addr, 0, sizeof(infop->redund.ip6_addr));
for (rp = result; rp != NULL; rp = rp->ai_next) {
if(rp->ai_family == AF_INET)
{
ipv4 = (struct sockaddr_in *)rp->ai_addr;
*(ulong*)infop->redund.ip6_addr = ((struct in_addr *)&ipv4->sin_addr)->s_addr;
infop->af = AF_INET;
// IPv4 address is translated.
//{
// char ipAddress[INET_ADDRSTRLEN];
// inet_ntop(AF_INET, &(ipv4->sin_addr), ipAddress, INET_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
} else if(rp->ai_family == AF_INET6)
{
ipv6 = (struct sockaddr_in6 *)rp->ai_addr;
memcpy(infop->redund.ip6_addr, ((struct in6_addr *)&ipv6->sin6_addr)->s6_addr, 16);
infop->af = AF_INET6;
//{
// char ipAddress[INET6_ADDRSTRLEN];
// inet_ntop(AF_INET6, &(ipv6->sin6_addr), ipAddress, INET6_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
}
}
if (rp == NULL) { /* No address succeeded */
sprintf(msg, "No available host is found. @ %d, %s\n", __LINE__, __FUNCTION__);
log_event(msg);
ret2 = NP_RET_ERROR;
break;
}
freeaddrinfo(result); /* No longer needed */
break;
}
if( ret1!=NP_RET_SUCCESS || ret2!=NP_RET_SUCCESS ){
return NP_RET_ERROR;
} else {
return NP_RET_SUCCESS;
}
}
#ifndef DNS_NAME_RESOLVE
int lib_name2ip6(infop)
TTYINFO *infop;
{
int ret;
struct addrinfo *result = NULL, *rp;
struct addrinfo hints;
struct sockaddr_in *ipv4;
struct sockaddr_in6 *ipv6;
char msg[255]={0};
int error_cnt = 10;
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC; /* Allow IPv4 or IPv6 */
hints.ai_socktype = SOCK_STREAM; /* Datagram socket */
hints.ai_flags = AI_PASSIVE; /* For wildcard IP address */
ret = getaddrinfo(infop->ip_addr_s, NULL, &hints, &result);
if( ret==EAI_AGAIN ){
// TODO: Figure out the cause of error. Ask user to do correct configuration or friendly warning messages.
// Sometimes, this error occurred. It means DNS server or DNS configuration are wrong temporarily.
do{
ret = getaddrinfo(infop->ip_addr_s, NULL, &hints, &result);
sleep(1);
} while( ret==EAI_AGAIN && --error_cnt>0 );
}
if (ret != 0) {
sprintf(msg, "getaddrinfo: %s @ %d, %s\n", gai_strerror(ret), __LINE__, __FUNCTION__);
log_event(msg);
return -1;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
if(rp->ai_family == AF_INET)
{
ipv4 = (struct sockaddr_in *)rp->ai_addr;
*(u_long*)infop->ip6_addr = ((struct in_addr *)&ipv4->sin_addr)->s_addr;
infop->af = AF_INET;
// IPv4 address is translated.
//{
// char ipAddress[INET_ADDRSTRLEN];
// inet_ntop(AF_INET, &(ipv4->sin_addr), ipAddress, INET_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
} else if(rp->ai_family == AF_INET6)
{
ipv6 = (struct sockaddr_in6 *)rp->ai_addr;
memcpy(infop->ip6_addr, ((struct in6_addr *)&ipv6->sin6_addr)->s6_addr, 16);
infop->af = AF_INET6;
//{
// char ipAddress[INET6_ADDRSTRLEN];
// inet_ntop(AF_INET6, &(ipv6->sin6_addr), ipAddress, INET6_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
}
}
freeaddrinfo(result); /* No longer needed */
if (rp == NULL) { /* No address succeeded */
sprintf(msg, "No available host is found. @ %d, %s\n", __LINE__, __FUNCTION__);
log_event(msg);
return -1;
}
if (infop->redundant_mode) {
hints.ai_family = AF_INET; /* Allow IPv4 or IPv6 */
ret = getaddrinfo(infop->redund.redund_ip, NULL, &hints, &result);
if (ret != 0) {
sprintf(msg, "getaddrinfo: %s @ %d, %s\n", gai_strerror(ret), __LINE__, __FUNCTION__);
log_event(msg);
return -1;
}
for (rp = result; rp != NULL; rp = rp->ai_next) {
if(rp->ai_family == AF_INET)
{
ipv4 = (struct sockaddr_in *)rp->ai_addr;
*(u_long*)infop->redund.ip6_addr = ((struct in_addr *)&ipv4->sin_addr)->s_addr;
infop->af = AF_INET;
// IPv4 address is translated.
//{
// char ipAddress[INET_ADDRSTRLEN];
// inet_ntop(AF_INET, &(ipv4->sin_addr), ipAddress, INET_ADDRSTRLEN);
// sprintf(msg, "ipAddress: %s @ %d, %s\n", ipAddress, __LINE__, __FUNCTION__);
// log_event(msg);
//}
break;
}
}
if (rp == NULL) { /* No address succeeded */
sprintf(msg, "No available host is found. @ %d, %s\n", __LINE__, __FUNCTION__);
log_event(msg);
return -1;
}
freeaddrinfo(result); /* No longer needed */
}
return 0;
}
#endif
/*
* Prepare LOG file and read the config TTY records.
*
*/
int moxattyd_read_config(cmdpath)
char * cmdpath;
{
int n, data, cmd;
FILE * ConfigFd;
struct hostent *host;
TTYINFO * infop;
char workpath[128], buf[160];
char ttyname[160],tcpport[16],cmdport[16];
char ttyname2[160], curname[160], scope_id[10];
int redundant_mode;
int32_t server_type,disable_fifo;
#ifdef SSL_ON
int32_t ssl_enable;
#else
int32_t temp;
#endif
redundant_mode = 0;
// Scott: 2005-10-03
// The original design will lead to an incorrect workpath.
// Use fixed path instead.
sprintf(workpath, "/usr/lib/npreal2/driver");
/*
* Prepare the full-path file names of LOG/Configuration.
*/
sprintf(buf,"%s/npreal2d.cf", workpath); /* Config file name */
sprintf(EventLog,"%s/npreal2d.log", workpath); /* Log file name */
/*
* Open configuration file:
*/
ConfigFd = fopen(buf, "r");
if ( ConfigFd == NULL )
{
log_event("Can't open configuration file (npreal2d.cf) !");
return(-1); /* Can't open file ! */
}
/*
* old configuration file format.
*"Device Id" "Server IP addr/Name" "data_port" "cmd_port" "Server Type"
* ex:
* 0 192.168.1.1 950 966 2500
* 1 tty_server 951 967 303
* 2 192.168.1.1 950 966 311
*
*
* Read configuration & the data format of every data line is :
* [Minor] [ServerIP] [Data] [Cmd] [FIFO] [ttyName] [coutName]
* 0 192.168.1.1 950 966 1 ttyr00 cur00
* 1 192.168.1.1 951 967 1 ttyr01 cur01
* 2 192.168.1.1 952 968 1 ttyr02 cur02
*
* Security data format
* [Minor] [ServerIP] [Data] [Cmd] [FIFO] [SSL] [ttyName] [coutName] [interface]
* 0 192.168.1.1 950 966 1 0 ttyr00 cur00
* 1 192.168.1.1 951 967 1 0 ttyr01 cur01
* 2 192.168.1.1 952 968 1 1 ttyr02 cur02
* 3 fe80::216:d4ff:fe80:63e6 950 966 1 0 ttyr03 cur03 eth0
*/
ttys = 0;
infop = ttys_info;
while ( ttys < MAX_TTYS )
{
if ( fgets(buf, sizeof(buf), ConfigFd) == NULL )
break; /* end of file */
memset(&infop->redund, 0, sizeof(struct redund_struct));
server_type = disable_fifo = 0;
#ifdef SSL_ON
ssl_enable = 0;
#endif
n = sscanf(buf, "%s%s%s%s%d%d%s%s%s%d%s",
ttyname,
infop->ip_addr_s,
tcpport,
cmdport,
&disable_fifo,
#ifdef SSL_ON
&ssl_enable,
#else
&temp,
#endif
ttyname2,
curname,
scope_id,
&infop->redundant_mode,
infop->redund.redund_ip);
// printf("[AP] [ttyname = %s],[tcpport = %s],[ip1 = %s],[ip2 = %s]\n", ttyname, tcpport,
// infop->ip_addr_s,
// infop->redund.redund_ip);
if(n != 10 && n != 11)
{
continue;
}
if (ttyname[0]=='#')
continue;
Graw_mode = 1;
Gredund_mode = 1;
/* in npreal2d.cf, [FIFO] is set to 1 if user is tend to */
/* enable fifo, so the value of disable_fifo must be set to 0*/
/* vice versa */
if (disable_fifo == 1)
{
disable_fifo = 0;
}
else
{
disable_fifo = 1;
}
// server_type = CN2500;
sprintf(infop->mpt_name,"/proc/npreal2/%s",ttyname);
#ifdef DNS_NAME_RESOLVE
resolve_dns_host_name(infop);
#else
if(lib_name2ip6(infop) == -1)
{
log_event("ip address fail!!");
continue;
}
if(infop->af == AF_INET)
{
if ( *(u_long*)infop->ip6_addr == (uint32_t)0xFFFFFFFF )
continue;
}
#endif
if ( (data = atoi(tcpport)) <= 0 || data >= 10000 )
continue;
if ( (cmd = atoi(cmdport)) <= 0 || cmd >= 10000 )
continue;
if((strncmp(infop->ip_addr_s, "fe80", 4) == 0) || (strncmp(infop->ip_addr_s, "FE80", 4) == 0))
{
if(strlen(scope_id) == 0)
{
break;
}
strcpy(infop->scope_id, scope_id);
}
else
{
memset(infop->scope_id, 0, 10);
}
infop->tcp_port = data;
infop->cmd_port = cmd;
infop->mpt_fd = -1;
infop->sock_fd = -1;
infop->sock_cmd_fd = -1;
infop->state = STATE_INIT;
infop->mpt_bufptr = (char *)malloc(BUFFER_SIZE * 2);
if ( infop->mpt_bufptr == (char *)NULL )
{
log_event("Alocate memory fail !");
break;
}
infop->sock_bufptr = infop->mpt_bufptr + BUFFER_SIZE;
infop->mpt_datakeep = 0;
infop->mpt_dataofs = 0;
infop->mpt_cmdkeep = 0;
infop->sock_datakeep = 0;
infop->sock_dataofs = 0;
infop->sock_cmdkeep = 0;
infop->error_flags = 0;
strcpy(infop->ttyname, ttyname);
strcpy(infop->ttyname2, ttyname2);
strcpy(infop->curname, curname);
infop->server_type = server_type;
infop->disable_fifo = disable_fifo;
infop->tcp_wait_id = 0;
if (!Restart_daemon)
infop->tty_used_timestamp = 0;
infop->first_servertime = 0;
#ifdef SSL_ON
infop->pssl = NULL;
infop->ssl_enable = ssl_enable;
#endif
infop++;
ttys++;
} /* while ( ttys < MAX_TTYS ) */
/*
* Close configuration file:
*/
fclose(ConfigFd);
if ( ttys == 0 )
log_event("Have no any TTY configured record !");
return(ttys);
}
/*
* Initialize a daemon process & detach a daemon process from login
* session context.
*/
void moxattyd_daemon_start()
{
register int childpid, fd;
/*
* If we were started by init (process 1) from the /etc/inittab file
* there's no need to detach.
* This test is unreliable due to an unavoidable ambiguity if the
* process is started by some other process and orphaned (i.e., if
* the parent process terminates before we are started).
*/
if ( getppid() == 1 )
goto next;
/*
* Ignore the terminal stop signals.
*/
#ifdef SIGTTOU
signal(SIGTTOU, SIG_IGN);
#endif
#ifdef SIGTTIN
signal(SIGTTIN, SIG_IGN);
#endif
#ifdef SIGTSTP
signal(SIGTSTP, SIG_IGN);
#endif
/*
* If we were not started in the background, fork and let the parent
* exit. This also guarantees the first child is not a process group
* leader.
*/
if ( (childpid = fork()) < 0 )
{
log_event("Can't fork first child !");
exit(0);
}
else if ( childpid > 0 )
exit(0); /* parent process */
/*
* Disassociate from controlling terminal and process group.
* Ensure the process can't reacquire a new controlling terminal.
*/
#ifdef TIOCNOTTY
if ( (fd = open("/dev/tty", O_RDWR)) >= 0 )
{
ioctl(fd, TIOCNOTTY, (char *)NULL);
close(fd);
}
#else
if ( setpgrp() == -1 )
{
log_event("Can't change process group !");
exit(0);
}
signal(SIGHUP, SIG_IGN); /* immune from pgrp leader death */
if ( (childpid = fork()) < 0 )
{
log_event("Can't fork second child !");
exit(0);
}
else if ( childpid > 0 )
exit(0); /* parent process */
#endif
next:
/*
* Close any open files descriptors.
*/
#if 1
close(0);
close(1);
close(2);
#endif
errno = 0;
/*
* Move the current directory to root, to make sure we aren't on a
* mounted filesystem.
*/
chdir("/");
/*
* Clear any inherited file mode creation mask.
*/
umask(0);
}
/*
* Initialize the polling Server UDP socket & server IP table.
*/
int poll_async_server_init()
{
int i, n, udp_port;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sysinfo sys_info;
int af;
int family[] = {AF_INET, AF_INET6};
struct sockaddr * ptr;
int len;
servers = 0;
af = ttys_info[0].af;
for ( i=0; i<ttys; i++ )
{
for ( n=0; n<servers; n++ )
{
// These loop will store IP for last tty port. It also align variable 'n' for later usage.
if ( *(u_long*)serv_info[n].ip6_addr == *(u_long*)ttys_info[i].ip6_addr )
break;
else if(memcmp(serv_info[n].ip6_addr, ttys_info[i].ip6_addr, 16) == 0)
break;
}
if ( n == servers )
{
// For each tty, it initiate server parameters here.
sysinfo(&sys_info);
ttys_info[i].serv_index = servers;
if(ttys_info[i].af == AF_INET)
*(u_long*)serv_info[servers].ip6_addr = *(u_long*)ttys_info[i].ip6_addr;
else
memcpy(serv_info[servers].ip6_addr, ttys_info[i].ip6_addr, 16);
serv_info[servers].af = ttys_info[i].af;
serv_info[servers].dev_type = 0;
serv_info[servers].serial_no = 0;
serv_info[servers].last_servertime = (time_t)((int32_t)(sys_info.uptime - 2));
serv_info[servers].next_sendtime = (time_t)((int32_t)(sys_info.uptime - 1));
serv_info[servers].ap_id = 0;
serv_info[servers].hw_id = 0;
serv_info[servers].dsci_ver= 0xFFFF;
serv_info[servers].start_item= 0;
servers++;
}
else
ttys_info[i].serv_index = n; // Scott added: 2005-03-02
}
for(i=0; i<2; i++)
{
ptr = (i == IS_IPV4)? (struct sockaddr*)&sin : (struct sockaddr*)&sin6;
len = (i == IS_IPV4)? sizeof(sin) : sizeof(sin6);
if ( (polling_nport_fd[i] = socket(family[i], SOCK_DGRAM, 0)) < 0 )
{
log_event("Can not open the polling_nport_fd socket !");
if(i == IS_IPV6)
{
polling_nport_fd[1] = -1;
enable_ipv6 = DIS_IPV6;
break;
}
return(-1);
}
if(i == IS_IPV4)
{
sin.sin_family = AF_INET;
sin.sin_port = 0;
sin.sin_addr.s_addr = INADDR_ANY;
}
else
{
memset(&sin6, 0, sizeof(sin6));
sin6.sin6_family = AF_INET6;
sin6.sin6_port = 0;
}
if (bind(polling_nport_fd[i], ptr, len) == 0)
{
#ifdef FIONBIO
fcntl(polling_nport_fd[i], FIONBIO);
#endif
}
else
{
for(n=0; n<=i; n++)
{
close(polling_nport_fd[n]);
polling_nport_fd[n] = -1;
}
log_event("Can not bind the polling NPort UDP port !");
return(-1);
}
}
if ( (polling_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 )
{
log_event("Can not open the polling UDP socket !");
return(-1);
}
sin.sin_family = AF_INET;
sin.sin_port = 0;
sin.sin_addr.s_addr = INADDR_ANY;
if (bind(polling_fd, (struct sockaddr*)&sin, sizeof(sin)) == 0)
{
#ifdef FIONBIO
fcntl(polling_fd, FIONBIO);
#endif
}
else
{
close(polling_fd);
polling_fd = -1; /* Add by Ying */
for(i=0; i<2; i++)
{
close(polling_nport_fd[i]);
polling_nport_fd[i] = -1;
}
log_event("Can not bind the polling UDP port !");
return(-1);
}
return 0;
}
void log_event(msg)
char * msg;
{
if (Restart_daemon)
return;
_log_event_backup(EventLog, msg);
}
#ifndef STREAM
void restart_handle ()
#endif
#ifdef STREAM
void restart_handle (int sig)
#endif
{
Restart_daemon = 1;
#ifndef STREAM
signal (SIGTERM, ( (void (*)()) wait_handle) );
#endif
#ifdef STREAM
sig = sig;
signal (SIGTERM, wait_handle);
#endif
}
#ifndef STREAM
void wait_handle ()
#endif
#ifdef STREAM
void wait_handle (int sig)