1 files changed, 399 insertions, 0 deletions

diff --git a/1.4.23-rc4/apps/app_disa.c b/1.4.23-rc4/apps/app_disa.c
new file mode 100644
index 000000000..f49d19704
--- /dev/null
+++ b/1.4.23-rc4/apps/app_disa.c
@@ -0,0 +1,399 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ *
+ * Made only slightly more sane by Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief DISA -- Direct Inward System Access Application
+ *
+ * \author Jim Dixon <jim@lambdatel.com>
+ * 
+ * \ingroup applications
+ */
+ 
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <sys/time.h>
+
+#include "asterisk/lock.h"
+#include "asterisk/file.h"
+#include "asterisk/logger.h"
+#include "asterisk/channel.h"
+#include "asterisk/app.h"
+#include "asterisk/indications.h"
+#include "asterisk/pbx.h"
+#include "asterisk/module.h"
+#include "asterisk/translate.h"
+#include "asterisk/ulaw.h"
+#include "asterisk/callerid.h"
+#include "asterisk/stringfields.h"
+
+static char *app = "DISA";
+
+static char *synopsis = "DISA (Direct Inward System Access)";
+
+static char *descrip = 
+	"DISA(<numeric passcode>[|<context>]) or DISA(<filename>)\n"
+	"The DISA, Direct Inward System Access, application allows someone from \n"
+	"outside the telephone switch (PBX) to obtain an \"internal\" system \n"
+	"dialtone and to place calls from it as if they were placing a call from \n"
+	"within the switch.\n"
+	"DISA plays a dialtone. The user enters their numeric passcode, followed by\n"
+	"the 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"
+	"Be aware that using this compromises the security of your PBX.\n\n"
+	"The arguments to this application (in extensions.conf) allow either\n"
+	"specification of a single global passcode (that everyone uses), or\n"
+	"individual passcodes contained in a file. It also allows 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 a normal system will have a special context set up\n"
+	"for DISA use with some or a lot of restrictions. \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 \";\". In addition, the\n"
+	"above arguments may have |new-callerid-string appended to them, to\n"
+	"specify a new (different) callerid to be used for this call, for\n"
+	"example: numeric-passcode|context|\"My Phone\" <(234) 123-4567> or \n"
+	"full-pathname-of-passcode-file|\"My Phone\" <(234) 123-4567>.  Last\n"
+	"but not least, |mailbox[@context] may be appended, which will cause\n"
+	"a stutter-dialtone (indication \"dialrecall\") to be used, if the\n"
+	"specified mailbox contains any new messages, for example:\n"
+	"numeric-passcode|context||1234 (w/a changing callerid).  Note that\n"
+	"in the case of specifying the numeric-passcode, the context must be\n"
+	"specified if the callerid is specified also.\n\n"
+	"If login is successful, the application looks up the dialed number in\n"
+	"the specified (or default) context, and executes it if found.\n"
+	"If the user enters an invalid extension and extension \"i\" (invalid) \n"
+	"exists in the context, it will be used. Also, if you set the 5th argument\n"
+	"to 'NOANSWER', the DISA application will not answer initially.\n";
+
+
+static void play_dialtone(struct ast_channel *chan, char *mailbox)
+{
+	const struct tone_zone_sound *ts = NULL;
+	if(ast_app_has_voicemail(mailbox, NULL))
+		ts = ast_get_indication_tone(chan->zone, "dialrecall");
+	else
+		ts = ast_get_indication_tone(chan->zone, "dial");
+	if (ts)
+		ast_playtones_start(chan, 0, ts->data, 0);
+	else
+		ast_tonepair_start(chan, 350, 440, 0, 0);
+}
+
+static int disa_exec(struct ast_channel *chan, void *data)
+{
+	int i,j,k,x,did_ignore,special_noanswer;
+	int firstdigittimeout = 20000;
+	int digittimeout = 10000;
+	struct ast_module_user *u;
+	char *tmp, exten[AST_MAX_EXTENSION],acctcode[20]="";
+	char pwline[256];
+	char ourcidname[256],ourcidnum[256];
+	struct ast_frame *f;
+	struct timeval lastdigittime;
+	int res;
+	time_t rstart;
+	FILE *fp;
+	AST_DECLARE_APP_ARGS(args,
+		AST_APP_ARG(passcode);
+		AST_APP_ARG(context);
+		AST_APP_ARG(cid);
+		AST_APP_ARG(mailbox);
+		AST_APP_ARG(noanswer);
+	);
+
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "DISA requires an argument (passcode/passcode file)\n");
+		return -1;
+	}
+
+	u = ast_module_user_add(chan);
+	
+	if (chan->pbx) {
+		firstdigittimeout = chan->pbx->rtimeout*1000;
+		digittimeout = chan->pbx->dtimeout*1000;
+	}
+	
+	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);
+		ast_module_user_remove(u);
+		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);
+		ast_module_user_remove(u);
+		return -1;
+	}
+	
+	ast_log(LOG_DEBUG, "Digittimeout: %d\n", digittimeout);
+	ast_log(LOG_DEBUG, "Responsetimeout: %d\n", firstdigittimeout);
+
+	tmp = ast_strdupa(data);
+
+	AST_STANDARD_APP_ARGS(args, tmp);
+
+	if (ast_strlen_zero(args.context)) 
+		args.context = "disa";	
+	if (ast_strlen_zero(args.mailbox))
+		args.mailbox = "";
+
+	ast_log(LOG_DEBUG, "Mailbox: %s\n",args.mailbox);
+	
+
+	special_noanswer = 0;
+	if ((!args.noanswer) || strcmp(args.noanswer,"NOANSWER"))
+	{
+		if (chan->_state != AST_STATE_UP) {
+			/* answer */
+			ast_answer(chan);
+		}
+	} else special_noanswer = 1;
+	i = k = x = 0; /* k is 0 for pswd entry, 1 for ext entry */
+	did_ignore = 0;
+	exten[0] = 0;
+	acctcode[0] = 0;
+	/* can we access DISA without password? */ 
+
+	ast_log(LOG_DEBUG, "Context: %s\n",args.context);
+
+	if (!strcasecmp(args.passcode, "no-password")) {
+		k |= 1; /* We have the password */
+		ast_log(LOG_DEBUG, "DISA no-password login success\n");
+	}
+	lastdigittime = ast_tvnow();
+
+	play_dialtone(chan, args.mailbox);
+
+	for (;;) {
+		  /* if outa time, give em reorder */
+		if (ast_tvdiff_ms(ast_tvnow(), lastdigittime) > 
+		    ((k&2) ? digittimeout : firstdigittimeout)) {
+			ast_log(LOG_DEBUG,"DISA %s entry timeout on chan %s\n",
+				((k&1) ? "extension" : "password"),chan->name);
+			break;
+		}
+		if ((res = ast_waitfor(chan, -1) < 0)) {
+			ast_log(LOG_DEBUG, "Waitfor returned %d\n", res);
+			continue;
+		}
+			
+		f = ast_read(chan);
+		if (f == NULL) {
+			ast_module_user_remove(u);
+			return -1;
+		}
+		if ((f->frametype == AST_FRAME_CONTROL) &&
+		    (f->subclass == AST_CONTROL_HANGUP)) {
+			ast_frfree(f);
+			ast_module_user_remove(u);
+			return -1;
+		}
+		if (f->frametype == AST_FRAME_VOICE) {
+			ast_frfree(f);
+			continue;
+		}
+
+		/* 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);
+		if (i == 0) {
+			k|=2; /* We have the first digit */ 
+			ast_playtones_stop(chan);
+		}
+		lastdigittime = ast_tvnow();
+		  /* got a DTMF tone */
+		if (i < AST_MAX_EXTENSION) { /* if still valid number of digits */
+			if (!(k&1)) { /* if in password state */
+				if (j == '#') { /* end of password */
+					  /* see if this is an integer */
+					if (sscanf(args.passcode,"%d",&j) < 1) { /* nope, it must be a filename */
+						fp = fopen(args.passcode,"r");
+						if (!fp) {
+							ast_log(LOG_WARNING,"DISA password file %s not found on chan %s\n",args.passcode,chan->name);
+							ast_module_user_remove(u);
+							return -1;
+						}
+						pwline[0] = 0;
+						while(fgets(pwline,sizeof(pwline) - 1,fp)) {
+							if (!pwline[0])
+								continue;
+							if (pwline[strlen(pwline) - 1] == '\n') 
+								pwline[strlen(pwline) - 1] = 0;
+							if (!pwline[0])
+								continue;
+							 /* skip comments */
+							if (pwline[0] == '#')
+								continue;
+							if (pwline[0] == ';')
+								continue;
+
+							AST_STANDARD_APP_ARGS(args, pwline);
+			
+							ast_log(LOG_DEBUG, "Mailbox: %s\n",args.mailbox);
+
+							/* password must be in valid format (numeric) */
+							if (sscanf(args.passcode,"%d", &j) < 1)
+								continue;
+							 /* if we got it */
+							if (!strcmp(exten,args.passcode)) {
+								if (ast_strlen_zero(args.context))
+									args.context = "disa";
+								if (ast_strlen_zero(args.mailbox))
+									args.mailbox = "";
+								break;
+							}
+						}
+						fclose(fp);
+					}
+					/* compare the two */
+					if (strcmp(exten,args.passcode)) {
+						ast_log(LOG_WARNING,"DISA on chan %s got bad password %s\n",chan->name,exten);
+						goto reorder;
+
+					}
+					 /* password good, set to dial state */
+					ast_log(LOG_DEBUG,"DISA on chan %s password is good\n",chan->name);
+					play_dialtone(chan, args.mailbox);
+
+					k|=1; /* In number mode */
+					i = 0;  /* re-set buffer pointer */
+					exten[sizeof(acctcode)] = 0;
+					ast_copy_string(acctcode, exten, sizeof(acctcode));
+					exten[0] = 0;
+					ast_log(LOG_DEBUG,"Successful DISA log-in on chan %s\n", chan->name);
+					continue;
+				}
+			} else {
+				if (j == '#') { /* end of extension .. maybe */
+					if (i == 0 && 
+							(ast_matchmore_extension(chan, args.context, "#", 1, chan->cid.cid_num) ||
+							 ast_exists_extension(chan, args.context, "#", 1, chan->cid.cid_num)) ) {
+						/* Let the # be the part of, or the entire extension */
+					} else {
+						break;
+					}
+				}
+			}
+
+			exten[i++] = j;  /* save digit */
+			exten[i] = 0;
+			if (!(k&1))
+				continue; /* if getting password, continue doing it */
+			/* if this exists */
+
+			if (ast_ignore_pattern(args.context, exten)) {
+				play_dialtone(chan, "");
+				did_ignore = 1;
+			} else
+				if (did_ignore) {
+					ast_playtones_stop(chan);
+					did_ignore = 0;
+				}
+
+			/* if can do some more, do it */
+			if (!ast_matchmore_extension(chan,args.context,exten,1, chan->cid.cid_num)) {
+				break;
+			}
+		}
+	}
+
+	if (k == 3) {
+		int recheck = 0;
+		struct ast_flags flags = { AST_CDR_FLAG_POSTED };
+
+		if (!ast_exists_extension(chan, args.context, exten, 1, chan->cid.cid_num)) {
+			pbx_builtin_setvar_helper(chan, "INVALID_EXTEN", exten);
+			exten[0] = 'i';
+			exten[1] = '\0';
+			recheck = 1;
+		}
+		if (!recheck || ast_exists_extension(chan, args.context, exten, 1, chan->cid.cid_num)) {
+			ast_playtones_stop(chan);
+			/* We're authenticated and have a target extension */
+			if (!ast_strlen_zero(args.cid)) {
+				ast_callerid_split(args.cid, ourcidname, sizeof(ourcidname), ourcidnum, sizeof(ourcidnum));
+				ast_set_callerid(chan, ourcidnum, ourcidname, ourcidnum);
+			}
+
+			if (!ast_strlen_zero(acctcode))
+				ast_string_field_set(chan, accountcode, acctcode);
+
+			if (special_noanswer) flags.flags = 0;
+			ast_cdr_reset(chan->cdr, &flags);
+			ast_explicit_goto(chan, args.context, exten, 1);
+			ast_module_user_remove(u);
+			return 0;
+		}
+	}
+
+	/* Received invalid, but no "i" extension exists in the given context */
+
+reorder:
+
+	ast_indicate(chan,AST_CONTROL_CONGESTION);
+	/* something is invalid, give em reorder for several seconds */
+	time(&rstart);
+	while(time(NULL) < rstart + 10) {
+		if (ast_waitfor(chan, -1) < 0)
+			break;
+		f = ast_read(chan);
+		if (!f)
+			break;
+		ast_frfree(f);
+	}
+	ast_playtones_stop(chan);
+	ast_module_user_remove(u);
+	return -1;
+}
+
+static int unload_module(void)
+{
+	int res;
+
+	res = ast_unregister_application(app);
+
+	ast_module_user_hangup_all();
+
+	return res;
+}
+
+static int load_module(void)
+{
+	return ast_register_application(app, disa_exec, synopsis, descrip);
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "DISA (Direct Inward System Access) Application");