Version 0.1.9 from FTP
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@354 f38db490-d61c-443f-a65b-d21fe96a405b
This commit is contained in:
markster
parent
a64eaf9e1c
commit
d4986b5370
|
|
@ -0,0 +1,401 @@
|
|||
/*
|
||||
* Asterisk -- A telephony toolkit for Linux.
|
||||
*
|
||||
* DISA -- Direct Inward System Access Application 6/20/2001
|
||||
*
|
||||
* Copyright (C) 2001, Linux Support Services, Inc.
|
||||
*
|
||||
* Jim Dixon <jim@lambdatel.com>
|
||||
*
|
||||
* This program is free software, distributed under the terms of
|
||||
* the GNU General Public License
|
||||
*/
|
||||
|
||||
#include <asterisk/file.h>
|
||||
#include <asterisk/logger.h>
|
||||
#include <asterisk/channel.h>
|
||||
#include <asterisk/pbx.h>
|
||||
#include <asterisk/module.h>
|
||||
#include <asterisk/translate.h>
|
||||
#include <asterisk/ulaw.h>
|
||||
#include <string.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdio.h>
|
||||
#include <math.h>
|
||||
#include <pthread.h>
|
||||
#include <sys/time.h>
|
||||
|
||||
#define TONE_BLOCK_SIZE 200
|
||||
|
||||
static char *tdesc = "DISA (Direct Inward System Access) Application";
|
||||
|
||||
static char *app = "DISA";
|
||||
|
||||
static char *synopsis = "DISA (Direct Inward System Access)";
|
||||
|
||||
static char *descrip =
|
||||
"DISA (Direct Inward System Access) -- Allows someone from outside\n"
|
||||
"the telephone switch (PBX) to obtain an \"internal\" system dialtone\n"
|
||||
"and to place calls from it as if they were placing a call from within\n"
|
||||
"the switch. A user calls a number that connects to the DISA application\n"
|
||||
"and is given dialtone. The user enters their passcode, followed by the\n"
|
||||
"pound sign (#). If the passcode is correct, the user is then given\n"
|
||||
"system dialtone on which a call may be placed. Obviously, this type\n"
|
||||
"of access has SERIOUS security implications, and GREAT care must be\n"
|
||||
"taken NOT to compromise your security.\n\n"
|
||||
"There is a possibility of accessing DISA without password. Simply\n"
|
||||
"exchange your password with no-password.\n\n"
|
||||
" Example: exten => s,1,DISA,no-password|local\n\n"
|
||||
"but be aware of using this for your security compromising.\n\n"
|
||||
"The arguments to this application (in extensions.conf) allow either\n"
|
||||
"specification of a single global password (that everyone uses), or\n"
|
||||
"individual passwords contained in a file. It also allow specification\n"
|
||||
"of the context on which the user will be dialing. If no context is\n"
|
||||
"specified, the DISA application defaults the context to \"disa\"\n"
|
||||
"presumably that a normal system will have a special context set up\n"
|
||||
"for DISA use with some or a lot of restrictions. The arguments are\n"
|
||||
"one of the following:\n\n"
|
||||
" numeric-passcode\n"
|
||||
" numeric-passcode|context\n"
|
||||
" full-pathname-of-file-that-contains-passcodes\n\n"
|
||||
"The file that contains the passcodes (if used) allows specification\n"
|
||||
"of either just a passcode (defaulting to the \"disa\" context, or\n"
|
||||
"passcode|context on each line of the file. The file may contain blank\n"
|
||||
"lines, or comments starting with \"#\" or \";\".\n\n"
|
||||
"If login is successful, the application parses the dialed number in\n"
|
||||
"the specified (or default) context, and returns 0 with the new extension\n"
|
||||
"context filled-in and the priority set to 1, so that the PBX may\n"
|
||||
"re-apply the routing tables to it and complete the call normally.";
|
||||
|
||||
|
||||
STANDARD_LOCAL_USER;
|
||||
|
||||
LOCAL_USER_DECL;
|
||||
|
||||
static float loudness=8192.0;
|
||||
|
||||
int firstdigittimeout = 10000; /* 10 seconds first digit timeout */
|
||||
int digittimeout = 5000; /* 5 seconds subsequent digit timeout */
|
||||
|
||||
static void make_tone_block(unsigned char *data, float f1, float f2, int *x);
|
||||
|
||||
static void make_tone_block(unsigned char *data, float f1, float f2, int *x)
|
||||
{
|
||||
int i;
|
||||
float val;
|
||||
|
||||
for(i = 0; i < TONE_BLOCK_SIZE; i++)
|
||||
{
|
||||
val = loudness * sin((f1 * 2.0 * M_PI * (*x))/8000.0);
|
||||
val += loudness * sin((f2 * 2.0 * M_PI * (*x)++)/8000.0);
|
||||
data[i] = ast_lin2mu[(int)val + 32768];
|
||||
}
|
||||
/* wrap back around from 8000 */
|
||||
if (*x >= 8000) *x = 0;
|
||||
return;
|
||||
}
|
||||
|
||||
static int ms_diff(struct timeval *tv1, struct timeval *tv2)
|
||||
{
|
||||
int ms;
|
||||
|
||||
ms = (tv1->tv_sec - tv2->tv_sec) * 1000;
|
||||
ms += (tv1->tv_usec - tv2->tv_usec) / 1000;
|
||||
return(ms);
|
||||
}
|
||||
|
||||
static int disa_exec(struct ast_channel *chan, void *data)
|
||||
{
|
||||
int i,j,k,x;
|
||||
struct localuser *u;
|
||||
char tmp[256],exten[AST_MAX_EXTENSION];
|
||||
unsigned char tone_block[TONE_BLOCK_SIZE],sil_block[TONE_BLOCK_SIZE];
|
||||
char *ourcontext;
|
||||
struct ast_frame *f,wf;
|
||||
fd_set readfds;
|
||||
int waitfor_notime;
|
||||
struct timeval notime = { 0,0 }, lastout, now, lastdigittime;
|
||||
FILE *fp;
|
||||
|
||||
if (ast_set_write_format(chan,AST_FORMAT_ULAW))
|
||||
{
|
||||
ast_log(LOG_WARNING, "Unable to set write format to Mu-law on %s\n",chan->name);
|
||||
return -1;
|
||||
}
|
||||
if (ast_set_read_format(chan,AST_FORMAT_ULAW))
|
||||
{
|
||||
ast_log(LOG_WARNING, "Unable to set read format to Mu-law on %s\n",chan->name);
|
||||
return -1;
|
||||
}
|
||||
lastout.tv_sec = lastout.tv_usec = 0;
|
||||
/* make block of silence */
|
||||
memset(sil_block,0x7f,TONE_BLOCK_SIZE);
|
||||
if (!data || !strlen((char *)data)) {
|
||||
ast_log(LOG_WARNING, "disa requires an argument (passcode/passcode file)\n");
|
||||
return -1;
|
||||
}
|
||||
strncpy(tmp, (char *)data, sizeof(tmp));
|
||||
strtok(tmp, "|");
|
||||
ourcontext = strtok(NULL, "|");
|
||||
/* if context not specified, use "disa" */
|
||||
if (!ourcontext) ourcontext = "disa";
|
||||
LOCAL_USER_ADD(u);
|
||||
if (chan->state != AST_STATE_UP)
|
||||
{
|
||||
/* answer */
|
||||
ast_answer(chan);
|
||||
}
|
||||
i = k = x = 0; /* k is 0 for pswd entry, 1 for ext entry */
|
||||
exten[0] = 0;
|
||||
/* can we access DISA without password? */
|
||||
if (!strcasecmp(tmp, "no-password"))
|
||||
{
|
||||
k = 1;
|
||||
ast_log(LOG_DEBUG, "DISA no-password login success\n");
|
||||
}
|
||||
gettimeofday(&lastdigittime,NULL);
|
||||
for(;;)
|
||||
{
|
||||
gettimeofday(&now,NULL);
|
||||
/* if outa time, give em reorder */
|
||||
if (ms_diff(&now,&lastdigittime) >
|
||||
((k) ? digittimeout : firstdigittimeout))
|
||||
{
|
||||
ast_log(LOG_DEBUG,"DISA %s entry timeout on chan %s\n",
|
||||
((k) ? "extension" : "password"),chan->name);
|
||||
goto reorder;
|
||||
}
|
||||
/* if first digit or ignore, send dialtone */
|
||||
if ((!i) || (ast_ignore_pattern(ourcontext,exten) && k))
|
||||
{
|
||||
gettimeofday(&now,NULL);
|
||||
if (lastout.tv_sec &&
|
||||
(ms_diff(&now,&lastout) < 25)) continue;
|
||||
lastout.tv_sec = now.tv_sec;
|
||||
lastout.tv_usec = now.tv_usec;
|
||||
wf.frametype = AST_FRAME_VOICE;
|
||||
wf.subclass = AST_FORMAT_ULAW;
|
||||
wf.offset = AST_FRIENDLY_OFFSET;
|
||||
wf.mallocd = 0;
|
||||
wf.data = tone_block;
|
||||
wf.datalen = TONE_BLOCK_SIZE;
|
||||
/* make this tone block */
|
||||
make_tone_block(tone_block,350.0,440.0,&x);
|
||||
wf.timelen = wf.datalen / 8;
|
||||
if (ast_write(chan, &wf))
|
||||
{
|
||||
ast_log(LOG_WARNING, "DISA Failed to write frame on %s\n",chan->name);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
waitfor_notime = notime.tv_usec + notime.tv_sec * 1000;
|
||||
if (!ast_waitfor_nandfds(&chan, 1, &(chan->fds[0]), 1, NULL, NULL,
|
||||
&waitfor_notime)) continue;
|
||||
f = ast_read(chan);
|
||||
if (f == NULL)
|
||||
{
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
if ((f->frametype == AST_FRAME_CONTROL) &&
|
||||
(f->subclass == AST_CONTROL_HANGUP))
|
||||
{
|
||||
ast_frfree(f);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
/* if not DTMF, just do it again */
|
||||
if (f->frametype != AST_FRAME_DTMF)
|
||||
{
|
||||
ast_frfree(f);
|
||||
continue;
|
||||
}
|
||||
j = f->subclass; /* save digit */
|
||||
ast_frfree(f);
|
||||
gettimeofday(&lastdigittime,NULL);
|
||||
/* got a DTMF tone */
|
||||
if (i < AST_MAX_EXTENSION) /* if still valid number of digits */
|
||||
{
|
||||
if (!k) /* if in password state */
|
||||
{
|
||||
if (j == '#') /* end of password */
|
||||
{
|
||||
/* see if this is an integer */
|
||||
if (sscanf(tmp,"%d",&j) < 1)
|
||||
{ /* nope, it must be a filename */
|
||||
fp = fopen(tmp,"r");
|
||||
if (!fp)
|
||||
{
|
||||
ast_log(LOG_WARNING,"DISA password file %s not found on chan %s\n",tmp,chan->name);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
tmp[0] = 0;
|
||||
while(fgets(tmp,sizeof(tmp) - 1,fp))
|
||||
{
|
||||
if (!tmp[0]) continue;
|
||||
if (tmp[strlen(tmp) - 1] == '\n')
|
||||
tmp[strlen(tmp) - 1] = 0;
|
||||
if (!tmp[0]) continue;
|
||||
/* skip comments */
|
||||
if (tmp[0] == '#') continue;
|
||||
if (tmp[0] == ';') continue;
|
||||
strtok(tmp, "|");
|
||||
ourcontext = strtok(NULL, "|");
|
||||
/* password must be in valid format (numeric) */
|
||||
if (sscanf(tmp,"%d",&j) < 1) continue;
|
||||
/* if we got it */
|
||||
if (!strcmp(exten,tmp)) break;
|
||||
}
|
||||
fclose(fp);
|
||||
}
|
||||
/* compare the two */
|
||||
if (strcmp(exten,tmp))
|
||||
{
|
||||
ast_log(LOG_WARNING,"DISA on chan %s got bad password %s\n",chan->name,exten);
|
||||
goto reorder;
|
||||
}
|
||||
/* password good, set to dial state */
|
||||
k = 1;
|
||||
i = 0; /* re-set buffer pointer */
|
||||
exten[0] = 0;
|
||||
ast_log(LOG_DEBUG,"Successful DISA log-in on chan %s\n",chan->name);
|
||||
continue;
|
||||
}
|
||||
}
|
||||
exten[i++] = j; /* save digit */
|
||||
exten[i] = 0;
|
||||
if (!k) continue; /* if getting password, continue doing it */
|
||||
/* if this exists */
|
||||
if (ast_exists_extension(chan,ourcontext,exten,1, chan->callerid))
|
||||
{
|
||||
strcpy(chan->exten,exten);
|
||||
strcpy(chan->context,ourcontext);
|
||||
chan->priority = 0;
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return 0;
|
||||
}
|
||||
/* if can do some more, do it */
|
||||
if (ast_canmatch_extension(chan,ourcontext,exten,1, chan->callerid)) continue;
|
||||
}
|
||||
reorder:
|
||||
/* something is invalid, give em reorder forever */
|
||||
x = 0;
|
||||
for(;;)
|
||||
{
|
||||
for(i = 0; i < 10; i++)
|
||||
{
|
||||
do gettimeofday(&now,NULL);
|
||||
while (lastout.tv_sec &&
|
||||
(ms_diff(&now,&lastout) < 25)) ;
|
||||
lastout.tv_sec = now.tv_sec;
|
||||
lastout.tv_usec = now.tv_usec;
|
||||
wf.frametype = AST_FRAME_VOICE;
|
||||
wf.subclass = AST_FORMAT_ULAW;
|
||||
wf.offset = AST_FRIENDLY_OFFSET;
|
||||
wf.mallocd = 0;
|
||||
wf.data = tone_block;
|
||||
wf.datalen = TONE_BLOCK_SIZE;
|
||||
/* make this tone block */
|
||||
make_tone_block(tone_block,480.0,620.0,&x);
|
||||
wf.timelen = wf.datalen / 8;
|
||||
if (ast_write(chan, &wf))
|
||||
{
|
||||
ast_log(LOG_WARNING, "DISA Failed to write frame on %s\n",chan->name);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
FD_ZERO(&readfds);
|
||||
FD_SET(chan->fds[0],&readfds);
|
||||
/* if no read avail, do send again */
|
||||
if (select(chan->fds[0] + 1,&readfds,NULL,
|
||||
NULL,¬ime) < 1) continue;
|
||||
/* read frame */
|
||||
f = ast_read(chan);
|
||||
if (f == NULL)
|
||||
{
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
if ((f->frametype == AST_FRAME_CONTROL) &&
|
||||
(f->subclass == AST_CONTROL_HANGUP))
|
||||
{
|
||||
ast_frfree(f);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
ast_frfree(f);
|
||||
}
|
||||
for(i = 0; i < 10; i++)
|
||||
{
|
||||
do gettimeofday(&now,NULL);
|
||||
while (lastout.tv_sec &&
|
||||
(ms_diff(&now,&lastout) < 25)) ;
|
||||
lastout.tv_sec = now.tv_sec;
|
||||
lastout.tv_usec = now.tv_usec;
|
||||
wf.frametype = AST_FRAME_VOICE;
|
||||
wf.subclass = AST_FORMAT_ULAW;
|
||||
wf.offset = AST_FRIENDLY_OFFSET;
|
||||
wf.mallocd = 0;
|
||||
wf.data = sil_block;
|
||||
wf.datalen = TONE_BLOCK_SIZE;
|
||||
wf.timelen = wf.datalen / 8;
|
||||
if (ast_write(chan, &wf))
|
||||
{
|
||||
ast_log(LOG_WARNING, "DISA Failed to write frame on %s\n",chan->name);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
FD_ZERO(&readfds);
|
||||
FD_SET(chan->fds[0],&readfds);
|
||||
/* if no read avail, do send again */
|
||||
if (select(chan->fds[0] + 1,&readfds,NULL,
|
||||
NULL,¬ime) < 1) continue;
|
||||
/* read frame */
|
||||
f = ast_read(chan);
|
||||
if (f == NULL)
|
||||
{
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
if ((f->frametype == AST_FRAME_CONTROL) &&
|
||||
(f->subclass == AST_CONTROL_HANGUP))
|
||||
{
|
||||
ast_frfree(f);
|
||||
LOCAL_USER_REMOVE(u);
|
||||
return -1;
|
||||
}
|
||||
ast_frfree(f);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
int unload_module(void)
|
||||
{
|
||||
STANDARD_HANGUP_LOCALUSERS;
|
||||
return ast_unregister_application(app);
|
||||
}
|
||||
|
||||
int load_module(void)
|
||||
{
|
||||
return ast_register_application(app, disa_exec, synopsis, descrip);
|
||||
}
|
||||
|
||||
char *description(void)
|
||||
{
|
||||
return tdesc;
|
||||
}
|
||||
|
||||
int usecount(void)
|
||||
{
|
||||
int res;
|
||||
STANDARD_USECOUNT(res);
|
||||
return res;
|
||||
}
|
||||
|
||||
char *key()
|
||||
{
|
||||
return ASTERISK_GPL_KEY;
|
||||
}
|
||||
Reference in New Issue