lcr/main.c

847 lines
20 KiB
C

/*****************************************************************************\
** **
** Linux Call Router **
** **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg **
** **
** Main function **
** **
\*****************************************************************************/
#include "main.h"
MESSAGES
double now_d, last_d;
time_t now;
struct tm *now_tm;
struct timeval now_tv;
struct timezone now_tz;
#define GET_NOW() \
{ \
gettimeofday(&now_tv, &now_tz); \
now_d = ((double)(now_tv.tv_usec))/1000000 + now_tv.tv_sec; \
now = now_tv.tv_sec; \
now_tm = localtime(&now); \
}
#ifdef SOCKET_MISDN
FILE *debug_fp = NULL;
#else
int global_debug = 0;
#endif
int quit=0;
#if 0
struct lcr_fdset lcr_fdset[FD_SETSIZE];
#endif
pthread_mutex_t mutexd; // debug output mutex
pthread_mutex_t mutext; // trace output mutex
pthread_mutex_t mutexe; // error output mutex
//pthread_mutex_t mutex_lcr; // lcr process mutex
int memuse = 0;
int mmemuse = 0;
int cmemuse = 0;
int ememuse = 0;
int pmemuse = 0;
int amemuse = 0;
int rmemuse = 0;
int classuse = 0;
int fduse = 0;
int fhuse = 0;
char *debug_prefix = 0;
int debug_count = 0;
int last_debug = 0;
int debug_newline = 1;
int nooutput = 0;
void debug_usleep(int msec, char *file, int line, int hour, int min, int sec)
{
usleep(msec);
}
void debug(const char *function, int line, char *prefix, char *buffer)
{
/* if we have a new debug count, we add a mark */
if (last_debug != debug_count)
{
last_debug = debug_count;
if (!nooutput)
printf("\033[34m--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\033[36m\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
#ifdef SOCKET_MISDN
if (debug_fp)
fprintf(debug_fp, "--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
#else
if (options.deb&DEBUG_LOG && global_debug)
dprint(DBGM_MAN, 0, "--------------------- %04d.%02d.%02d %02d:%02d:%02d %06d\n", now_tm->tm_year+1900, now_tm->tm_mon+1, now_tm->tm_mday, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec, debug_count%1000000);
#endif
}
if (!nooutput)
{
if (debug_newline)
printf("\033[32m%06d %s\033[37m%s", debug_count%1000000, prefix?prefix:"", prefix?" ":"");
if (function)
printf("(in %s() line %d): %s", function, line, buffer);
else
printf("%s", buffer);
}
#ifdef SOCKET_MISDN
if (debug_fp)
#else
if (options.deb&DEBUG_LOG && global_debug)
#endif
{
if (debug_newline)
{
if (function)
#ifdef SOCKET_MISDN
fprintf(debug_fp, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
#else
dprint(DBGM_MAN, 0, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
#endif
else
#ifdef SOCKET_MISDN
fprintf(debug_fp, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
#else
dprint(DBGM_MAN, 0, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
#endif
}
}
debug_newline = 0;
if (buffer[0])
if (buffer[strlen(buffer)-1] == '\n')
debug_newline = 1;
}
void _printdebug(const char *function, int line, unsigned long mask, const char *fmt, ...)
{
char buffer[4096];
va_list args;
if (!(options.deb & mask))
return;
pthread_mutex_lock(&mutexd);
va_start(args,fmt);
VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
buffer[sizeof(buffer)-1]=0;
va_end(args);
debug(function, line, debug_prefix, buffer);
pthread_mutex_unlock(&mutexd);
}
void _printerror(const char *function, int line, const char *fmt, ...)
{
char buffer[4096];
va_list args;
pthread_mutex_lock(&mutexe);
va_start(args,fmt);
VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
buffer[sizeof(buffer)-1]=0;
va_end(args);
if (options.deb)
debug(function, line, "ERROR", buffer);
else /* only if we do not debug */
{
if (function)
fprintf(stderr, "ERROR (in %s() line %d) %s", function, line, buffer);
else
fprintf(stderr, "ERROR %s", buffer);
}
pthread_mutex_unlock(&mutexe);
}
void sighandler(int sigset)
{
struct sched_param schedp;
if (sigset == SIGHUP)
return;
if (sigset == SIGPIPE)
return;
if (!quit)
{
quit=1;
/* set scheduler & priority */
if (options.schedule > 1)
{
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = 0;
sched_setscheduler(0, SCHED_OTHER, &schedp);
}
fprintf(stderr, "LCR: Signal received: %d\n", sigset);
PERROR("Signal received: %d\n", sigset);
}
}
/*
* the main
*/
int main(int argc, char *argv[])
{
int ret = -1;
int lockfd = -1; /* file lock */
struct lcr_msg *message;
class Port *port;
class Endpoint *epoint;
class Join *join;
int i;
int all_idle;
char prefix_string[64];
struct sched_param schedp;
char *debug_prefix = "alloc";
int created_mutexd = 0,/* created_mutext = 0,*/ created_mutexe = 0,
created_lock = 0, created_signal = 0, created_debug = 0;
int idletime = 0, idlecheck = 0;
char tracetext[256];
#if 0
/* init fdset */
memset(lcr_fdset, 0, sizeof(lcr_fdset));
#endif
/* lock LCR process */
// pthread_mutex_lock(&mutex_lcr);
/* current time */
GET_NOW();
/* show version */
printf("\n** %s Version %s\n\n", NAME, VERSION_STRING);
/* show options */
if (argc <= 1)
{
usage:
printf("\n");
printf("Usage: lcr (query | start | fork | rules | route)\n");
printf("query = Show available isdn ports.\n");
printf("start = Run lcr normally, abort with CTRL+C.\n");
printf("fork = Do daemon fork and run as background process.\n");
printf("interface = Get help of available interface syntax.\n");
printf("rules = Get help of available routing rule syntax.\n");
printf("rules [action] = Get individual help for given action.\n");
// printf("route = Show current routing as it is parsed.\n");
printf("\n");
ret = 999;
goto free;
}
/* init crc */
crc_init();
/* check for root (real or effective) */
if (getuid() && geteuid())
{
fprintf(stderr, "Please run %s as super-user.\n", NAME);
goto free;
}
/* the mutex init */
if (pthread_mutex_init(&mutexd, NULL))
{
fprintf(stderr, "cannot create 'PDEBUG' mutex\n");
goto free;
}
created_mutexd = 1;
// if (pthread_mutex_init(&mutext, NULL))
// {
// fprintf(stderr, "cannot create 'trace' mutex\n");
// goto free;
// }
// created_mutext = 1;
if (pthread_mutex_init(&mutexe, NULL))
{
fprintf(stderr, "cannot create 'PERROR' mutex\n");
goto free;
}
created_mutexe = 1;
/* show interface */
if (!(strcasecmp(argv[1],"interface")))
{
doc_interface();
ret = 0;
goto free;
}
/* show rules */
if (!(strcasecmp(argv[1],"rules")))
{
if (argc <= 2)
doc_rules(NULL);
else
doc_rules(argv[2]);
ret = 0;
goto free;
}
/* query available isdn ports */
if (!(strcasecmp(argv[1],"query")))
{
mISDN_port_info();
ret = 0;
goto free;
}
/* read options */
if (read_options() == 0)
goto free;
/* init mISDN */
if (mISDN_initialize() < 0)
goto free;
created_debug = 1;
/* read ruleset(s) */
if (!(ruleset_first = ruleset_parse()))
goto free;
/* set pointer to main ruleset */
ruleset_main = getrulesetbyname("main");
if (!ruleset_main)
{
fprintf(stderr, "\n***\n -> Missing 'main' ruleset, causing ALL calls to be disconnected.\n***\n\n");
PDEBUG(DEBUG_LOG, "Missing 'main' ruleset, causing ALL calls to be disconnected.\n");
sleep(2);
}
#if 0
/* query available isdn ports */
if (!(strcasecmp(argv[1],"route")))
{
ruleset_debug(ruleset_first);
ret = 0;
goto free;
}
#endif
/* do fork in special cases */
if (!(strcasecmp(argv[1],"fork")))
{
pid_t pid;
/* do daemon fork */
pid = fork();
if (pid < 0)
{
fprintf(stderr, "Cannot fork!\n");
goto free;
}
if (pid != 0)
{
exit(0);
}
usleep(200000);
printf("\n");
/* do second fork */
pid = fork();
if (pid < 0)
{
fprintf(stderr, "Cannot fork!\n");
goto free;
}
if (pid != 0)
{
printf("LCR: Starting daemon.\n");
exit(0);
}
nooutput = 1;
} else
/* if not start */
if (!!strcasecmp(argv[1],"start"))
{
goto usage;
}
/* create lock and lock! */
if ((lockfd = open("/var/run/lcr.lock", O_CREAT, 0)) < 0)
{
fprintf(stderr, "Cannot create lock file: /var/run/lcr.lock\n");
goto free;
}
if (flock(lockfd, LOCK_EX|LOCK_NB) < 0)
{
if (errno == EWOULDBLOCK)
fprintf(stderr, "LCR: Another LCR process is running. Please kill the other one.\n");
else fprintf(stderr, "Locking process failed: errno=%d\n", errno);
goto free;
}
created_lock = 1;
/* initialize admin socket */
if (admin_init())
{
fprintf(stderr, "Unable to initialize admin socket.\n");
goto free;
}
/* generate alaw / ulaw tables */
generate_tables(options.law);
/* load tones (if requested) */
if (fetch_tones() == 0)
{
fprintf(stderr, "Unable to fetch tones into memory.\n");
goto free;
}
/* read interfaces and open ports */
if (!read_interfaces())
{
PERROR_RUNTIME("No interfaces specified or failed to parse interface.conf.\n");
fprintf(stderr, "No interfaces specified or failed to parse interface.conf.\n");
goto free;
}
relink_interfaces();
interface_first = interface_newlist;
interface_newlist = NULL;
/* locking memory paging */
i = 0;
while(i < 10)
{
if (mlockall(MCL_CURRENT | MCL_FUTURE) >= 0)
break;
usleep(200000);
i++;
}
if (i == 10)
{
switch(errno)
{
case ENOMEM:
fprintf(stderr, "Not enough memory to lock paging, exitting...\n");
break;
case EPERM:
fprintf(stderr, "No permission to lock paging, exitting...\n");
break;
case EFAULT:
fprintf(stderr, "'Bad address' while locking paging, exitting...\n");
break;
default:
fprintf(stderr, "Unknown error %d while locking paging, exitting...\n", errno);
}
goto free;
}
/* set real time scheduler & priority */
if (options.schedule > 1)
{
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = options.schedule;
ret = sched_setscheduler(0, SCHED_RR, &schedp);
if (ret < 0)
{
PERROR("Scheduling failed with given priority %d (errno = %d).\nCheck options.conf 'schedule', exitting...\n", options.schedule, errno);
goto free;
}
}
/* signal handlers */
signal(SIGINT,sighandler);
signal(SIGHUP,sighandler);
signal(SIGTERM,sighandler);
signal(SIGPIPE,sighandler);
created_signal = 1;
/*** main loop ***/
SPRINT(tracetext, "%s %s started, waiting for calls...", NAME, VERSION_STRING);
start_trace(0, NULL, NULL, NULL, 0, 0, 0, tracetext);
printf("%s\n", tracetext);
end_trace();
GET_NOW();
quit = 0;
while(!quit)
{
last_d = now_d;
GET_NOW();
if (now_d-last_d > 1.0)
{
PERROR("LCR was stalling %d.%d seconds\n", ((int)((now_d-last_d)*10.0))/10, (int)((now_d-last_d)*10.0));
}
/* all loops must be counted from the beginning since nodes might get freed during handler */
all_idle = 1;
//#warning debugging usleep crash
// debug_usleep(1, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
/* handle mISDN messages from kernel */
debug_prefix = "ISDN";
if (mISDN_handler())
all_idle = 0;
//#warning debugging usleep crash
// debug_usleep(1, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
BUDETECT
/* loop through all port ports and call their handler */
port_again:
port = port_first;
while(port)
{
debug_prefix = port->p_name;
debug_count++;
ret = port->handler();
if (ret)
all_idle = 0;
if (ret < 0) /* port has been destroyed */
goto port_again;
port = port->next;
}
/* loop through all epoint and call their handler */
epoint_again:
epoint = epoint_first;
while(epoint)
{
debug_prefix = prefix_string;
SPRINT(prefix_string, "ep%ld", epoint->ep_serial);
debug_count++;
ret = epoint->handler();
if (ret)
all_idle = 0;
if (ret < 0) /* epoint has been destroyed */
goto epoint_again;
epoint = epoint->next;
}
/* loop through all joins and call their handler */
join_again:
join = join_first;
while(join)
{
debug_prefix = "join";
debug_count++;
ret = join->handler();
if (ret)
all_idle = 0;
if (ret < 0) /* join has been destroyed */
goto join_again;
join = join->next;
}
debug_prefix = 0;
/* process any message */
debug_count++;
debug_prefix = "message";
while ((message = message_get()))
{
all_idle = 0;
switch(message->flow)
{
case PORT_TO_EPOINT:
debug_prefix = "msg port->epoint";
epoint = find_epoint_id(message->id_to);
if (epoint)
{
if (epoint->ep_app)
{
epoint->ep_app->ea_message_port(message->id_from, message->type, &message->param);
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from port %d to endpoint %d. endpoint doesn't have an application.\n", messages_txt[message->type], message->id_from, message->id_to);
}
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from port %d to endpoint %d. endpoint doesn't exist anymore.\n", messages_txt[message->type], message->id_from, message->id_to);
}
break;
case EPOINT_TO_JOIN:
debug_prefix = "msg epoint->join";
join = find_join_id(message->id_to);
if (join)
{
join->message_epoint(message->id_from, message->type, &message->param);
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from endpoint %d to join %d. join doesn't exist anymore\n", messages_txt[message->type], message->id_from, message->id_to);
}
break;
case JOIN_TO_EPOINT:
debug_prefix = "msg join->epoint";
epoint = find_epoint_id(message->id_to);
if (epoint)
{
if (epoint->ep_app)
{
epoint->ep_app->ea_message_join(message->id_from, message->type, &message->param);
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from join %d to endpoint %d. endpoint doesn't have an application.\n", messages_txt[message->type], message->id_from, message->id_to);
}
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from join %d to endpoint %d. endpoint doesn't exist anymore.\n", messages_txt[message->type], message->id_from, message->id_to);
}
break;
case EPOINT_TO_PORT:
debug_prefix = "msg epoint->port";
port = find_port_id(message->id_to);
if (port)
{
port->message_epoint(message->id_from, message->type, &message->param);
BUDETECT
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from endpoint %d to port %d. port doesn't exist anymore\n", messages_txt[message->type], message->id_from, message->id_to);
}
break;
default:
PERROR("Message flow %d unknown.\n", message->flow);
}
message_free(message);
debug_count++;
debug_prefix = "message";
}
BUDETECT
/* handle socket */
if (admin_handle())
all_idle = 0;
BUDETECT
#if 0
/* check for child to exit (eliminate zombies) */
if (waitpid(-1, NULL, WNOHANG) > 0)
{
PDEBUG(DEBUG_EPOINT, "a child process (created by endpoint) has exitted.\n");
all_idle = 0;
}
#endif
//#warning debugging usleep crash
// debug_usleep(1, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
/* do idle checking */
if (idlecheck != now)
{
PDEBUG(DEBUG_IDLETIME, "Idle time : %d%%\n", idletime/10000);
idletime = 0;
idlecheck = now;
}
/* did we do nothing? so we wait to give time to other processes */
if (all_idle)
{
// pthread_mutex_unlock(&mutex_lcr); // unlock LCR
debug_usleep(4000, __FILE__, __LINE__, now_tm->tm_hour, now_tm->tm_min, now_tm->tm_sec);
// pthread_mutex_lock(&mutex_lcr); // lock LCR
idletime += 4000;
}
}
SPRINT(tracetext, "%s terminated", NAME);
printf("%s\n", tracetext);
start_trace(0, NULL, NULL, NULL, 0, 0, 0, tracetext);
if (ret)
add_trace("error", NULL, "%d", ret);
end_trace();
ret=0;
/* free all */
free:
/* set scheduler & priority
*/
if (options.schedule > 1)
{
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = options.schedule;
sched_setscheduler(0, SCHED_OTHER, &schedp);
}
/* reset signals */
if (created_signal)
{
signal(SIGINT,SIG_DFL);
signal(SIGHUP,SIG_DFL);
signal(SIGTERM,SIG_DFL);
signal(SIGPIPE,SIG_DFL);
}
/* destroy objects */
debug_prefix = "free";
while(port_first)
{
debug_count++;
delete port_first;
}
while(epoint_first)
{
debug_count++;
delete epoint_first;
}
epoint_first = NULL;
debug_count++;
join_free();
/* free interfaces */
if (interface_first)
free_interfaces(interface_first);
interface_first = NULL;
/* close isdn ports */
mISDNport_close_all();
/* flush messages */
debug_count++;
i = 0;
while ((message = message_get()))
{
i++;
message_free(message);
}
if (i)
{
PDEBUG(DEBUG_MSG, "freed %d pending messages\n", i);
}
/* free tones */
if (toneset_first)
free_tones();
/* free admin socket */
admin_cleanup();
/* close lock */
if (created_lock)
flock(lockfd, LOCK_UN);
if (lockfd >= 0)
close(lockfd);
/* free rulesets */
if (ruleset_first)
ruleset_free(ruleset_first);
ruleset_first = NULL;
/* free mutex */
if (created_mutexe)
if (pthread_mutex_destroy(&mutexe))
fprintf(stderr, "cannot destroy 'PERROR' mutex\n");
// if (created_mutext)
// if (pthread_mutex_destroy(&mutext))
// fprintf(stderr, "cannot destroy 'trace' mutex\n");
if (created_mutexd)
if (pthread_mutex_destroy(&mutexd))
fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
/* deinitialize mISDN */
mISDN_deinitialize();
/* display memory leak */
#define MEMCHECK(a, b) \
if (b) \
{ \
SPRINT(tracetext, a, NAME); \
start_trace(0, NULL, NULL, NULL, 0, 0, 0, tracetext); \
if (ret) add_trace("blocks", NULL, "%d", b); \
end_trace(); \
printf("\n******************************\n\007"); \
printf("\nERROR: %d %s\n", b, a); \
printf("\n******************************\n"); \
ret = -1; \
}
MEMCHECK("",memuse)
MEMCHECK("memory block(s) left (port.cpp ...)",pmemuse)
MEMCHECK("memory block(s) left (epoint*.cpp ...)",ememuse)
MEMCHECK("memory block(s) left (join*.cpp)",cmemuse)
MEMCHECK("memory block(s) left (message.c)",mmemuse)
MEMCHECK("memory block(s) left (route.c)",rmemuse)
MEMCHECK("memory block(s) left (args)",amemuse)
MEMCHECK("class(es) left",classuse)
MEMCHECK("file descriptor(s) left",fduse)
MEMCHECK("file handler(s) left",fhuse)
/* unlock LCR process */
// pthread_mutex_unlock(&mutex_lcr);
/* take me out */
return(ret);
}
#ifdef BUDETECT_DEF
/* special debug function to detect buffer overflow
*/
int budetect_stop = 0;
void budetect(const char *file, int line, char *function)
{
if (budetect_stop)
return;
/* modify this function to detect race-bugs */
#warning DID YOU MODIFY THIS FUNCTION TO DETECT THE BUFFER OVERFLOW BUG?
class Port *port;
class PmISDN *pmisdn;
struct mISDNport *mISDNport = mISDNport_first;
int i, ii;
while(mISDNport)
{
i = 0;
ii = mISDNport->b_num;
while(i < ii)
{
if (mISDNport->b_port[i])
{
port = port_first;
while(port)
{
if ((port->p_type&PORT_CLASS_MASK) == PORT_CLASS_ISDN)
{
pmisdn = (class PmISDN *)port;
if (pmisdn->p_isdn_crypt_listen)
{
PERROR_RUNTIME("************************************************\n");
PERROR_RUNTIME("** BUG detected in %s, line %d, function %s\n", file, line, function);
PERROR_RUNTIME("** p_isdn_crypt_listen = %d\n", pmisdn->p_isdn_crypt_listen);
PERROR_RUNTIME("************************************************\n");
budetect_stop = 1;
}
}
if (port == mISDNport->b_port[i])
break;
port = port->next;
if (!port)
{
PERROR_RUNTIME("************************************************\n");
PERROR_RUNTIME("** BUG detected in %s, line %d, function %s\n", file, line, function);
PERROR_RUNTIME("** b_port not in list.\n");
PERROR_RUNTIME("************************************************\n");
budetect_stop = 1;
}
}
}
i++;
}
mISDNport = mISDNport->next;
}
}
#endif