1 files changed, 367 insertions, 0 deletions

diff --git a/trunk/apps/app_disa.c b/trunk/apps/app_disa.c
new file mode 100644
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+++ b/trunk/apps/app_disa.c
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+/*
+ * 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 <math.h>
+#include <sys/time.h>
+
+#include "asterisk/lock.h"
+#include "asterisk/file.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>[,<cid>[,mailbox[,options]]]]) or\n"
+"DISA(<filename>[,,,,options])\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 within <context> on which a call may be placed. If the user\n"
+"enters an invalid extension and extension \"i\" exists in the specified\n"
+"context, it will be used.\n"
+"\n"
+"If you need to present a DISA dialtone without entering a password, simply\n"
+"set <passcode> to \"no-password\".\n"
+"\n"
+"Be aware that using this may compromise 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.\n"
+"\n"
+"The file that contains the passcodes (if used) allows a complete\n"
+"specification of all of the same arguments available on the command\n"
+"line, with the sole exception of the options. The file may contain blank\n"
+"lines, or comments starting with \"#\" or \";\".\n"
+"\n"
+"<context> specifies the dialplan context in which the user-entered extension\n"
+"will be matched. If no context is specified, the DISA application defaults\n"
+"the context to \"disa\". Presumably a normal system will have a special\n"
+"context set up for DISA use with some or a lot of restrictions.\n"
+"\n"
+"<cid> specifies a new (different) callerid to be used for this call.\n"
+"\n"
+"<mailbox[@context]> will cause a stutter-dialtone (indication \"dialrecall\")\n"
+"to be used, if the specified mailbox contains any new messages.\n"
+"\n"
+"The following options are available:\n"
+"  n - the DISA application will not answer initially.\n"
+"  p - the extension entered will be considered complete when a '#' is entered.\n";
+
+enum {
+	NOANSWER_FLAG = (1 << 0),
+	POUND_TO_END_FLAG = (1 << 1),
+} option_flags;
+
+AST_APP_OPTIONS(app_opts, {
+	AST_APP_OPTION('n', NOANSWER_FLAG),
+	AST_APP_OPTION('p', POUND_TO_END_FLAG),
+});
+
+static void play_dialtone(struct ast_channel *chan, char *mailbox)
+{
+	const struct ind_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 = 0, j, k = 0, did_ignore = 0, special_noanswer = 0;
+	int firstdigittimeout = (chan->pbx ? chan->pbx->rtimeout * 1000 : 20000);
+	int digittimeout = (chan->pbx ? chan->pbx->dtimeout * 1000 : 10000);
+	struct ast_flags flags;
+	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;
+	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(options);
+	);
+
+	if (ast_strlen_zero(data)) {
+		ast_log(LOG_WARNING, "DISA requires an argument (passcode/passcode file)\n");
+		return -1;
+	}
+	
+	ast_debug(1, "Digittimeout: %d\n", digittimeout);
+	ast_debug(1, "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 = "";
+	if (!ast_strlen_zero(args.options))
+		ast_app_parse_options(app_opts, &flags, NULL, args.options);
+
+	ast_debug(1, "Mailbox: %s\n",args.mailbox);
+
+	if (!ast_test_flag(&flags, NOANSWER_FLAG)) {
+		if (chan->_state != AST_STATE_UP) {
+			/* answer */
+			ast_answer(chan);
+		}
+	} else
+		special_noanswer = 1;
+
+	ast_debug(1, "Context: %s\n",args.context);
+
+	if (!strcasecmp(args.passcode, "no-password")) {
+		k |= 1; /* We have the password */
+		ast_debug(1, "DISA no-password login success\n");
+	}
+
+	lastdigittime = ast_tvnow();
+
+	play_dialtone(chan, args.mailbox);
+
+	ast_set_flag(chan, AST_FLAG_END_DTMF_ONLY);
+
+	for (;;) {
+		  /* if outa time, give em reorder */
+		if (ast_tvdiff_ms(ast_tvnow(), lastdigittime) > ((k&2) ? digittimeout : firstdigittimeout)) {
+			ast_debug(1,"DISA %s entry timeout on chan %s\n",
+				  ((k&1) ? "extension" : "password"),chan->name);
+			break;
+		}
+		
+		if ((res = ast_waitfor(chan, -1) < 0)) {
+			ast_debug(1, "Waitfor returned %d\n", res);
+			continue;
+		}
+
+		if (!(f = ast_read(chan))) {
+			ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
+			return -1;
+		}
+
+		if ((f->frametype == AST_FRAME_CONTROL) && (f->subclass == AST_CONTROL_HANGUP)) {
+			ast_frfree(f);
+			ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
+			return -1;
+		}
+
+		/* If the frame coming in is not DTMF, just drop it and continue */
+		if (f->frametype != AST_FRAME_DTMF) {
+			ast_frfree(f);
+			continue;
+		}
+
+		j = f->subclass;  /* save digit */
+		ast_frfree(f);
+
+		if (!i) {
+			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_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
+							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_debug(1, "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_debug(1,"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_debug(1,"Successful DISA log-in on chan %s\n", chan->name);
+					continue;
+				}
+			} else {
+				if (j == '#') { /* end of extension */
+					break;
+				}
+			}
+
+			exten[i++] = j;  /* save digit */
+			exten[i] = 0;
+			if (!(k&1))
+				continue; /* if getting password, continue doing it */
+			/* if this exists */
+
+			/* user wants end of number, remove # */
+			if (ast_test_flag(&flags, POUND_TO_END_FLAG) && j == '#') {
+				exten[--i] = 0;
+				break;
+			}
+
+			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;
+			}
+		}
+	}
+
+	ast_clear_flag(chan, AST_FLAG_END_DTMF_ONLY);
+
+	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);
+			return 0;
+		}
+	}
+
+	/* Received invalid, but no "i" extension exists in the given context */
+
+reorder:
+	/* Play congestion for a bit */
+	ast_indicate(chan, AST_CONTROL_CONGESTION);
+	ast_safe_sleep(chan, 10*1000);
+
+	ast_playtones_stop(chan);
+
+	return -1;
+}
+
+static int unload_module(void)
+{
+	return ast_unregister_application(app);
+}
+
+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");