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lcr/main.c

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/*****************************************************************************\
** **
** Linux Call Router **
** **
**---------------------------------------------------------------------------**
** Copyright: Andreas Eversberg **
** **
** Main function **
** **
\*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <unistd.h>
#include <signal.h>
#include <stdarg.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <errno.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include "main.h"
MESSAGES
double now_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); \
}
//#define DEBUG_DURATION
int global_debug = 0;
int quit=0;
pthread_mutex_t mutexd; // debug output mutex
pthread_mutex_t mutexl; // log output mutex
pthread_mutex_t mutexe; // error output 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;
static 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);
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);
}
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);
}
if (options.deb&DEBUG_LOG && global_debug)
{
if (debug_newline)
{
if (function)
dprint(DBGM_MAN, 0, "%s%s(in %s() line %d): %s", prefix?prefix:"", prefix?" ":"", function, line, buffer);
else
dprint(DBGM_MAN, 0, "%s%s: %s", prefix?prefix:"", prefix?" ":"", buffer);
}
}
debug_newline = 0;
if (buffer[0])
if (buffer[strlen(buffer)-1] == '\n')
debug_newline = 1;
}
void printlog(const char *fmt, ...)
{
char buffer[4096];
va_list args;
FILE *fp;
pthread_mutex_lock(&mutexl);
va_start(args,fmt);
VUNPRINT(buffer,sizeof(buffer)-1,fmt,args);
buffer[sizeof(buffer)-1]=0;
va_end(args);
if (options.log[0])
{
if (options.deb & DEBUG_LOG)
debug(NULL, 0, "LOG ->", buffer);
if ((fp = fopen(options.log, "a")))
{
fduse++;
fprintf(fp, "%04d.%02d.%02d %02d:%02d:%02d %s", 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, buffer);
fclose(fp);
fduse--;
}
}
pthread_mutex_unlock(&mutexl);
}
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, "PBX: Signal received: %d\n", sigset);
PERROR("Signal received: %d\n", sigset);
}
}
/*
* the main
*/
#ifdef VOIP
#define ARGC (args.GetCount()+1)
#define ARGV(a) (args[a-1])
void PBXMain::Main(void)
{
PArgList &args = GetArguments();
#else
#define ARGC (argc)
#define ARGV(a) (argv[a])
int main(int argc, char *argv[])
{
#endif
int ret = -1;
int lockfd = -1; /* file lock */
struct message *message;
class Port *port;
class Endpoint *epoint;
class Call *call;
int i;
int all_idle;
char prefix_string[64];
struct sched_param schedp;
char *debug_prefix = "alloc";
int created_mutexd = 0, created_mutexl = 0, created_mutexe = 0,
created_lock = 0, created_signal = 0, created_debug = 0;
#ifdef DEBUG_DURATION
time_t durationupdate;
double idle_duration, isdn_duration, port_duration, epoint_duration, call_duration, message_duration, admin_duration;
double start_d;
#endif
int idletime = 0, idlecheck = 0;
char debug_log[128];
/* 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: pbx (query | start | fork | rules | route)\n");
printf("query = Show available isdn ports.\n");
printf("start = Run pbx 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 = 0;
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(&mutexl, NULL))
{
fprintf(stderr, "cannot create 'printlog' mutex\n");
goto free;
}
created_mutexl = 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;
/* initialize stuff of the NT lib */
if (options.deb & DEBUG_STACK)
{
global_debug = 0xffffffff & ~DBGM_MSG;
// global_debug = DBGM_L3DATA;
} else
global_debug = DBGM_MAN;
SPRINT(debug_log, "%s/debug.log", INSTALL_DATA);
if (options.deb & DEBUG_LOG)
debug_init(global_debug, debug_log, debug_log, debug_log);
else
debug_init(global_debug, NULL, NULL, NULL);
created_debug = 1;
msg_init();
/* 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("PBX: 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/pbx.lock", O_CREAT, 0)) < 0)
{
fprintf(stderr, "Cannot create lock file: /var/run/pbx.lock\n");
goto free;
}
if (flock(lockfd, LOCK_EX|LOCK_NB) < 0)
{
if (errno == EWOULDBLOCK)
fprintf(stderr, "PBX: Another PBX 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;
free_interfaces(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 ***/
printf("%s %s started, waiting for calls...\n", NAME, VERSION_STRING);
printlog("%s %s started, waiting for calls...\n", NAME, VERSION_STRING);
GET_NOW();
#ifdef DEBUG_DURATION
start_d = now_d;
durationupdate = now;
idle_duration = isdn_duration = port_duration = epoint_duration = call_duration = message_duration = admin_duration = 0;
#endif
quit = 0;
while(!quit)
{
/* all loops must be counted from the beginning since nodes might get freed during handler */
all_idle = 1;
/* handle mISDN messages from kernel */
debug_prefix = "ISDN";
if (mISDN_handler())
all_idle = 0;
#ifdef DEBUG_DURATION
GET_NOW();
isdn_duration += (now_d - start_d);
start_d = now_d;
#endif
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;
}
#ifdef DEBUG_DURATION
GET_NOW();
port_duration += (now_d - start_d);
start_d = now_d;
#endif
/* 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;
}
#ifdef DEBUG_DURATION
GET_NOW();
epoint_duration += (now_d - start_d);
start_d = now_d;
#endif
/* loop through all calls and call their handler */
call_again:
call = call_first;
while(call)
{
debug_prefix = "call";
debug_count++;
ret = call->handler();
if (ret)
all_idle = 0;
if (ret < 0) /* call has been destroyed */
goto call_again;
call = call->next;
}
#ifdef DEBUG_DURATION
GET_NOW();
call_duration += (now_d - start_d);
start_d = now_d;
#endif
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_CALL:
debug_prefix = "msg epoint->call";
call = find_call_id(message->id_to);
if (call)
{
call->message_epoint(message->id_from, message->type, &message->param);
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from endpoint %d to call %d. call doesn't exist anymore\n", messages_txt[message->type], message->id_from, message->id_to);
}
break;
case CALL_TO_EPOINT:
debug_prefix = "msg call->epoint";
epoint = find_epoint_id(message->id_to);
if (epoint)
{
if (epoint->ep_app)
{
epoint->ep_app->ea_message_call(message->id_from, message->type, &message->param);
} else
{
PDEBUG(DEBUG_MSG, "Warning: message %s from call %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 call %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";
}
#ifdef DEBUG_DURATION
GET_NOW();
message_duration += (now_d - start_d);
start_d = now_d;
#endif
BUDETECT
/* handle socket */
if (admin_handle())
all_idle = 0;
#ifdef DEBUG_DURATION
GET_NOW();
admin_duration += (now_d - start_d);
start_d = now_d;
#endif
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
/* do idle checking */
if (idlecheck != now)
{
PDEBUG(DEBUG_IDLETIME, "Idle time : %d%%\n", idletime/10000);
idletime = 0;
idlecheck = now;
}
#ifdef DEBUG_DURATION
GET_NOW();
idle_duration += (now_d - start_d);
start_d = now_d;
if (durationupdate != now)
{
durationupdate = now;
printf("Idle:%3d ISDN:%3d Port:%3d Epoint:%3d Call:%3d Message:%3d Admin:%3d\n",
(int)(idle_duration*100),
(int)(isdn_duration*100),
(int)(port_duration*100),
(int)(epoint_duration*100),
(int)(call_duration*100),
(int)(message_duration*100),
(int)(admin_duration*100));
idle_duration = isdn_duration = port_duration = epoint_duration = call_duration = message_duration = admin_duration = 0;
}
#else
GET_NOW();
#endif
/* did we do nothing? so we wait to give time to other processes */
if (all_idle)
{
usleep(4000); /* wait 32 samples */
idletime += 4000;
}
}
printlog("PBX terminated\n");
ret=0;
/* free all */
free:
/* set scheduler & priority
*/
if (options.schedule > 1)
{
memset(&schedp, 0, sizeof(schedp));
schedp.sched_priority = 0;
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++;
call_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_mutexl)
if (pthread_mutex_destroy(&mutexl))
fprintf(stderr, "cannot destroy 'printlog' mutex\n");
if (created_mutexd)
if (pthread_mutex_destroy(&mutexd))
fprintf(stderr, "cannot destroy 'PDEBUG' mutex\n");
/* close debug */
if (created_debug)
debug_close();
global_debug = 0;
/* display memory leak */
#define MEMCHECK(a, b) \
if (b) \
{ \
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 (call.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)
/* take me out */
if (ret)
printf("PBX: Exit (code %d)\n", ret);
#ifdef VOIP
return;
#else
return(ret);
#endif
}
#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
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