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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Everyone is permitted to copy and distribute verbatim copies
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Copyright (C) 19yy <name of author>
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Also add information on how to contact you by electronic and paper mail.
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Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
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The hypothetical commands `show w' and `show c' should show the appropriate
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
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library. If this is what you want to do, use the GNU Library General
Public License instead of this License.

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#
# Makefile for ISDN Tunnel Daemon
#
VERSION=0.3
PROG=itund
LIBS=-lcapi20 -lz
FILES=isdntun.o tun.o capiconn.o debug.o options.o \
capi.o signals.o data.o
CFLAGS=-Wall -O2 -I. -DVERSION=\"$(VERSION)\"
DESTDIR=/
BINDIR=sbin
all: $(PROG)
@echo "Done!"
.SUFFIXES:
.SUFFIXES: .c .o
.c.o:
$(CC) $(CFLAGS) -c -o $*.o $*.c
$(PROG): $(FILES)
$(CC) -o $(PROG) $(FILES) $(LDFLAGS) $(LIBS)
clean:
@rm -f *.o $(PROG) *.tgz
install: $(PROG)
mkdir -p $(DESTDIR)/$(BINDIR)
install -m 0755 $(PROG) $(DESTDIR)/$(BINDIR)/$(PROG)
release:
@rm -rf $(PROG)-$(VERSION)
@mkdir -p $(PROG)-$(VERSION)
@cp *.h *.c $(PROG)-$(VERSION)
@cp README Makefile COPYING CHANGES $(PROG)-$(VERSION)
@tar czf $(PROG)-$(VERSION).tgz $(PROG)-$(VERSION)
@rm -rf $(PROG)-$(VERSION)
@echo Archive created.

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ISDN-Tunnel-Daemon "itund"
License GNU GPL
Copyright 2004-2005 SYSGO Real-Time Solutions AG
Klein-Winternheim, Germany
http://www.sysgo.com
http://www.elinos.com
Copyright 2004-2005 Cytronics & Melware
ItunD is a user-space daemon to provide a network tunnel over ISDN lines. It works
similiar (and most important together with) the ISDN4Linux net-devices.
The ISDN link is provided as just another "network-card" to the kernel and can
be configured easily.
To provide the needed network interface, the generic TUN/TAP driver of kernels
2.4 and 2.6 is used. This driver is also used by vtun.sourceforge.net.
Impotant Notes
--------------
1. User-Space daemon only, no kernel patches necessary.
2. Options similar to PPPD CAPI options (pppdcapiplugin).
3. Works with ISDN4Linux (isdn_net) network (e.g. rawip).
Requirements
------------
1. ISDN card providing CAPI2.0 interface (Eicon Networks, AVM, ...)
The legacy isdn subsystem (isdn.o) is NOT necessary.
2. Enabled (and loaded) Generic TUN/TAP network driver.
Features
--------
When using itund on both sides, you may want to use encap "zipip"
which is basically rawip, but compressed if possible.
Examples
========
Callback Server (reject and call back)
itund --encap=rawip --controller=1 --protocol=hdlc \
--number=5678 --msn=1234 --demand --idle=60 \
--inmsn=1234 --coso=local --cbdelay=3
Client (expecting callback)
itund --encap=rawip --controller=1 --protocol=hdlc \
--number=1234 --msn=5678 --demand --idle=60 \
--inmsn=5678 --coso=remote --dialtimeout=1
armin.schindler@sysgo.com
armin@melware.de
$Id$

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/*
* CAPI connection handling
*
* heavily based on capiconn.* of pppdcapiplugin by
* Carsten Paeth (calle@calle.in-berlin.de)
*
* Copyright 2004 SYSGO Real-Time Solutions AG
* Klein-Winternheim, Germany
* All rights reserved.
*
* Author: Armin Schindler <armin.schindler@sysgo.com>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef __CAPICONN_H__
#define __CAPICONN_H__
#include <stdarg.h>
#include <capi20.h>
/*
* CAPI_MESSAGES:
* capiconn_inject():
* inject capi message into state machine
*
* capiconn_context:
* capiconn_getcontext():
* get a context and supply callback functions
* capiconn_freecontext():
* free a context allocated with "capiconn_getcontext"
* capiconn_addcontr():
* add a controller to the context
* capi_connection:
* capiconn_connect():
* connection setup, return a capi_connection.
* capiconn_accept():
* accept an incoming connection
* capiconn_ignore():
* ignore an incoming connection
* capiconn_reject():
* reject an incoming connection
* capiconn_send():
* send data to the connection
* capiconn_disconnect():
* disconnect a connection
* capiconn_getinfo()
* get infos about the connection
* capiconn_listen():
* setup listen
*/
/* -------- returncodes -------------------------------------------------- */
#define CAPICONN_OK 0
#define CAPICONN_NO_CONTROLLER -1
#define CAPICONN_NO_MEMORY -2
#define CAPICONN_WRONG_STATE 1
#define CAPICONN_NOT_SENT 2
#define CAPICONN_ALREADY_DISCONNECTING 3
/* -------- states for CAPI2.0 machine ----------------------------------- */
/*
* LISTEN state machine
*/
#define ST_LISTEN_NONE 0 /* L-0 */
#define ST_LISTEN_WAIT_CONF 1 /* L-0.1 */
#define ST_LISTEN_ACTIVE 2 /* L-1 */
#define ST_LISTEN_ACTIVE_WAIT_CONF 3 /* L-1.1 */
#define EV_LISTEN_REQ 1 /* L-0 -> L-0.1
L-1 -> L-1.1 */
#define EV_LISTEN_CONF_ERROR 2 /* L-0.1 -> L-0
L-1.1 -> L-1 */
#define EV_LISTEN_CONF_EMPTY 3 /* L-0.1 -> L-0
L-1.1 -> L-0 */
#define EV_LISTEN_CONF_OK 4 /* L-0.1 -> L-1
L-1.1 -> L.1 */
/*
* per plci state machine
*/
#define ST_PLCI_NONE 0 /* P-0 */
#define ST_PLCI_OUTGOING 1 /* P-0.1 */
#define ST_PLCI_ALLOCATED 2 /* P-1 */
#define ST_PLCI_ACTIVE 3 /* P-ACT */
#define ST_PLCI_INCOMING 4 /* P-2 */
#define ST_PLCI_FACILITY_IND 5 /* P-3 */
#define ST_PLCI_ACCEPTING 6 /* P-4 */
#define ST_PLCI_DISCONNECTING 7 /* P-5 */
#define ST_PLCI_DISCONNECTED 8 /* P-6 */
#define ST_PLCI_RESUMEING 9 /* P-0.Res */
#define ST_PLCI_RESUME 10 /* P-Res */
#define ST_PLCI_HELD 11 /* P-HELD */
#define EV_PLCI_CONNECT_REQ 1 /* P-0 -> P-0.1
*/
#define EV_PLCI_CONNECT_CONF_ERROR 2 /* P-0.1 -> P-0
*/
#define EV_PLCI_CONNECT_CONF_OK 3 /* P-0.1 -> P-1
*/
#define EV_PLCI_FACILITY_IND_UP 4 /* P-0 -> P-1
*/
#define EV_PLCI_CONNECT_IND 5 /* P-0 -> P-2
*/
#define EV_PLCI_CONNECT_ACTIVE_IND 6 /* P-1 -> P-ACT
*/
#define EV_PLCI_CONNECT_REJECT 7 /* P-2 -> P-5
P-3 -> P-5
*/
#define EV_PLCI_DISCONNECT_REQ 8 /* P-1 -> P-5
P-2 -> P-5
P-3 -> P-5
P-4 -> P-5
P-ACT -> P-5
P-Res -> P-5 (*)
P-HELD -> P-5 (*)
*/
#define EV_PLCI_DISCONNECT_IND 9 /* P-1 -> P-6
P-2 -> P-6
P-3 -> P-6
P-4 -> P-6
P-5 -> P-6
P-ACT -> P-6
P-Res -> P-6 (*)
P-HELD -> P-6 (*)
*/
#define EV_PLCI_FACILITY_IND_DOWN 10 /* P-0.1 -> P-5
P-1 -> P-5
P-ACT -> P-5
P-2 -> P-5
P-3 -> P-5
P-4 -> P-5
*/
#define EV_PLCI_DISCONNECT_RESP 11 /* P-6 -> P-0
*/
#define EV_PLCI_CONNECT_RESP 12 /* P-6 -> P-0
*/
#define EV_PLCI_RESUME_REQ 13 /* P-0 -> P-0.Res
*/
#define EV_PLCI_RESUME_CONF_OK 14 /* P-0.Res -> P-Res
*/
#define EV_PLCI_RESUME_CONF_ERROR 15 /* P-0.Res -> P-0
*/
#define EV_PLCI_RESUME_IND 16 /* P-Res -> P-ACT
*/
#define EV_PLCI_HOLD_IND 17 /* P-ACT -> P-HELD
*/
#define EV_PLCI_RETRIEVE_IND 18 /* P-HELD -> P-ACT
*/
#define EV_PLCI_SUSPEND_IND 19 /* P-ACT -> P-5
*/
#define EV_PLCI_CD_IND 20 /* P-2 -> P-5
*/
/*
* per ncci state machine
*/
#define ST_NCCI_PREVIOUS -1
#define ST_NCCI_NONE 0 /* N-0 */
#define ST_NCCI_OUTGOING 1 /* N-0.1 */
#define ST_NCCI_INCOMING 2 /* N-1 */
#define ST_NCCI_ALLOCATED 3 /* N-2 */
#define ST_NCCI_ACTIVE 4 /* N-ACT */
#define ST_NCCI_RESETING 5 /* N-3 */
#define ST_NCCI_DISCONNECTING 6 /* N-4 */
#define ST_NCCI_DISCONNECTED 7 /* N-5 */
#define EV_NCCI_CONNECT_B3_REQ 1 /* N-0 -> N-0.1 */
#define EV_NCCI_CONNECT_B3_IND 2 /* N-0 -> N.1 */
#define EV_NCCI_CONNECT_B3_CONF_OK 3 /* N-0.1 -> N.2 */
#define EV_NCCI_CONNECT_B3_CONF_ERROR 4 /* N-0.1 -> N.0 */
#define EV_NCCI_CONNECT_B3_REJECT 5 /* N-1 -> N-4 */
#define EV_NCCI_CONNECT_B3_RESP 6 /* N-1 -> N-2 */
#define EV_NCCI_CONNECT_B3_ACTIVE_IND 7 /* N-2 -> N-ACT */
#define EV_NCCI_RESET_B3_REQ 8 /* N-ACT -> N-3 */
#define EV_NCCI_RESET_B3_IND 9 /* N-3 -> N-ACT */
#define EV_NCCI_DISCONNECT_B3_IND 10 /* N-4 -> N.5 */
#define EV_NCCI_DISCONNECT_B3_CONF_ERROR 11 /* N-4 -> previous */
#define EV_NCCI_DISCONNECT_B3_REQ 12 /* N-1 -> N-4
N-2 -> N-4
N-3 -> N-4
N-ACT -> N-4 */
#define EV_NCCI_DISCONNECT_B3_RESP 13 /* N-5 -> N-0 */
/* ----------------------------------------------------------------------- */
char *capiconn_version(void);
/* -------- context ------------------------------------------------------ */
struct capi_connection; typedef struct capi_connection capi_connection;
struct capiconn_context; typedef struct capiconn_context capiconn_context;
struct capiconn_callbacks
{
/* ---------- memory functions ----------------- */
void *(*malloc)(size_t size);
void (*free)(void *buf);
/* ---------- connection callbacks ------------- */
/*
* the capi_connection will be destoried after
* calling this function
*/
void (*disconnected)(capi_connection *,
int localdisconnect,
unsigned reason,
unsigned reason_b3);
/*
* The application should call capiconn_accept()
* capiconn_ignore() or capiconn_reject() inside
* of the function. If not called an ALERT_REQ will
* be sent, to let the application time to decide ...
*/
void (*incoming)(capi_connection *,
unsigned contr,
unsigned chipvalue,
char *callednumber,
char *callingnumber);
/*
* Channel is ready to send and receive data
*/
void (*connected)(capi_connection *, _cstruct);
/*
* Data received on channel, the data pointer
* can not be used, after this function is called.
*/
void (*received)(capi_connection *,
unsigned char *data,
unsigned datalen);
/*
* called for every call to capiconn_send().
*/
void (*datasent)(capi_connection *, unsigned char *);
/*
* charge info received
*/
void (*chargeinfo)(capi_connection *,
unsigned long charge,
int inunits);
/*
* capi functions
*/
void (*capi_put_message) (unsigned appid, unsigned char *msg);
/*
* message functions
*/
void (*debugmsg)(const char *fmt, ...);
void (*infomsg)(const char *fmt, ...);
void (*errmsg)(const char *fmt, ...);
};
typedef struct capiconn_callbacks capiconn_callbacks;
/* -------- context functions -------------------------------------------- */
capiconn_context *capiconn_getcontext(unsigned appid, capiconn_callbacks *env);
int capiconn_freecontext(capiconn_context *ctx);
/* -------- inject capi message into state machine ----------------------- */
void capiconn_inject(unsigned appid, unsigned char *msg);
/* -------- add controller to context ------------------------------------ */
struct capi_contrinfo {
int bchannels;
char *ddi;
int ndigits; /* Durchwahllaenge */
};
typedef struct capi_contrinfo capi_contrinfo;
/*
* returncodes:
* CAPICONN_OK - controller added to the context
* CAPICONN_NO_MEMORY - callback "malloc" returns no memory.
*/
int capiconn_addcontr(capiconn_context *ctx,
unsigned contr, capi_contrinfo *cinfo);
/* -------- initiate a connection & disconnect a connection -------------- */
/*
* returncodes:
* a capi connection or 0 if
* - controller not found
* - memory problems
*/
capi_connection *
capiconn_connect(
capiconn_context *ctx,
unsigned contr,
_cword cipvalue,
char *callednumber, /* remote number */
char *callingnumber, /* own number */
_cword b1proto,
_cword b2proto,
_cword b3proto,
_cstruct b1config,
_cstruct b2config,
_cstruct b3config,
_cstruct bchaninfo,
_cstruct ncpi);
/*
* returncodes:
* CAPICONN_OK - disconnect initiated
* CAPICONN_ALREADY_DISCONNECTING - disconnect already initiated
* CAPICONN_WRONG_STATE - should not happen
*/
int capiconn_disconnect(capi_connection *connection, _cstruct ncpi);
/* -------- reaction on incoming calls ----------------------------------- */
/*
* returncodes:
* CAPICONN_OK - Accept initiated
* CAPICONN_WRONG_STATE - "conn" ist not in state "incoming"
* CAPICONN_NO_MEMORY - callback "malloc" returns no memory.
*/
int capiconn_accept(
capi_connection *conn,
_cword b1proto,
_cword b2proto,
_cword b3proto,
_cstruct b1config,
_cstruct b2config,
_cstruct b3config,
_cstruct ncpi);
/*
* returncodes:
* CAPICONN_OK - call will be ignored
* CAPICONN_WRONG_STATE - "conn" ist not in state "incoming"
*/
int capiconn_ignore(capi_connection *conn);
/*
* returncodes:
* CAPICONN_OK - call will be rejected
* CAPICONN_WRONG_STATE - "conn" ist not in state "incoming"
*/
int capiconn_reject(capi_connection *conn);
/*
* returncode:
* CAPICONN_OK - Data sent to CAPI
* CAPICONN_NOT_SENT - Data not sent (8 messages not acked)
* CAPICONN_WRONG_STATE - Connection is not connected
*/
int capiconn_send(capi_connection *plcip,
unsigned char *data,
unsigned len);
/*
* get info about connection
*/
struct capi_conninfo {
unsigned appid;
unsigned plci;
int plci_state;
unsigned ncci;
int ncci_state;
unsigned isincoming:1,
disconnect_was_local;
unsigned disconnectreason;
unsigned disconnectreason_b3;
/* user supplied */
_cword cipvalue;
_cstruct callednumber;
_cstruct callingnumber;
_cword b1proto;
_cword b2proto;
_cword b3proto;
_cstruct b1config;
_cstruct b2config;
_cstruct b3config;
_cstruct bchaninfo;
_cstruct ncpi;
};
typedef struct capi_conninfo capi_conninfo;
/*
* returncode:
* always a pointer to the conninfo.
* the conninfo will not be update automaticly,
* you always have to call this function to get
* the actual informations.
*/
capi_conninfo *capiconn_getinfo(capi_connection *p);
/*
* returncodes:
* CAPICONN_OK - Listen request sent
* CAPICONN_NO_CONTROLLER - Controller "contr" not added with
* capiconn_addcontr()
*/
int capiconn_listen(capiconn_context *ctx,
unsigned contr, unsigned cipmask, unsigned cipmask2);
/*
* returncodes:
* CAPICONN_OK - got ack for listen request
* CAPICONN_NO_CONTROLLER - Controller "contr" not added with
* capiconn_addcontr()
* CAPICONN_WRONG_STATE - got no ack for listen request
*/
int capiconn_listenstate(capiconn_context *ctx, unsigned contr);
#endif /* __CAPICONN_H__ */

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/*
* Data handling functions
*
* Copyright 2004 SYSGO Real-Time Solutions AG
* Klein-Winternheim, Germany
* All rights reserved.
*
* Author: Armin Schindler <armin.schindler@sysgo.com>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <zlib.h>
#include "isdntun.h"
#include "options.h"
#include "tun.h"
#include "capiconn.h"
int data_sent = 0;
time_t idle_last_use = 0;
static capi_connection *conn = NULL;
#undef DEBUG_DATA
/*
* flush the data in the interface
*/
void empty_interface(void)
{
fd_set rfds;
struct timeval tv;
int ret;
unsigned char buffer[2048];
info("empty interface %s queue", dev_name);
while (1) {
tv.tv_sec = 0;
tv.tv_usec = 0;
FD_ZERO(&rfds);
FD_SET(if_fd, &rfds);
ret = select(if_fd + 1, &rfds, NULL, NULL, &tv);
if (ret < 1)
break;
read(if_fd, buffer, sizeof(buffer));
dbglog("flushed one buffer");
}
}
/*
* compress data
*/
static void compress_data(unsigned char *buf, int *len)
{
unsigned long l1, l2;
unsigned char b[2048];
if (*len < 16)
return;
l1 = (unsigned long)*len;
memcpy(b, buf, *len);
l2 = sizeof(b);
buf[0] = 0;
if ((compress(buf + 1, &l2, b, l1) != Z_OK) ||
((l2 + 1) > *len)) {
memcpy(buf + 1, b, *len);
*len += 1;
dbglog("if data not compressed len=%d", *len);
return;
}
*len = (int)(l2 + 1);
buf[0] = 1;
dbglog("if data compressed %ld->%d", l1, *len);
}
/*
* compress data
*/
static void uncompress_data(unsigned char *buf, unsigned int *len)
{
unsigned long l1, l2;
unsigned char b[2048];
memcpy(b, buf, *len);
*len -= 1;
if (*b == 0) { /* not compressed */
memcpy(buf, b + 1, *len);
return;
}
l1 = (unsigned long)*len;
l2 = sizeof(b);
if (uncompress(buf, &l2, b + 1, l1) != Z_OK) {
*len = 0;
error("uncompress error");
return;
}
*len = (unsigned int)l2;
dbglog("if data uncompressed %ld->%d", l1, *len);
}
/*
* handle data coming from device
*/
void handle_if_data(void)
{
int len;
unsigned char buffer[2048];
if ((len = read(if_fd, buffer, sizeof(buffer))) < 1) {
error("error %d reading %s", len, dev_name);
return;
}
#ifdef DEBUG_DATA
{
int i;
FILE *f;
if ((f = fopen("/tmp/itun.txt", "a")) != NULL) {
fprintf(f, "inet %03d: ", len);
for (i = 0; i < len; i++)
fprintf(f, "%02x ", buffer[i]);
fprintf(f, "\n");
fclose(f);
}
}
#endif
if (encap == ENCAP_ZIPIP)
compress_data(buffer, &len);
data_sent = 0;
if (capiconn_send(conn, buffer, len) != CAPICONN_OK) {
error("data not sent");
}
idle_last_use = time(NULL);
}
/*
* handle data coming from capi (isdn)
*/
void handle_capi_data(capi_connection *con, unsigned char* data, unsigned int len)
{
int dlen;
dlen = len;
dbglog("capi data to if of len %d", dlen);
if (encap == ENCAP_ZIPIP)
uncompress_data(data, &dlen);
if (write(if_fd, data, dlen) != dlen)
error("Error writing isdn data to %s", dev_name);
idle_last_use = time(NULL);
#ifdef DEBUG_DATA
{
int i;
FILE *f;
if ((f = fopen("/tmp/itun.txt", "a")) != NULL) {
fprintf(f, "isdn %03d: ", dlen);
for (i = 0; i < dlen; i++)
fprintf(f, "%02x ", data[i]);
fprintf(f, "\n");
fclose(f);
}
}
#endif
}
/*
* isdn data have been sent
*/
void handle_capi_sent(capi_connection *con, unsigned char* data)
{
dbglog("data sent confirmed");
data_sent = 1;
}
/*
* get status of connection
*/
int is_connected(void)
{
if (conn)
return(1);
return(0);
}
/*
* if connection is established, store connection pointer
*/
void capi_is_connected(capi_connection *con)
{
conn = con;
data_sent = 1; /* ready for data */
idle_last_use = time(NULL);
new_phase(PHASE_RUNNING);
}
/*
* if connection is released, clear connection pointer
*/
void capi_is_disconnected(capi_connection *con)
{
conn = NULL;
new_phase(PHASE_DISCONNECT);
}

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/*
* Data handling functions
*
* Copyright 2004 SYSGO Real-Time Solutions AG
* Klein-Winternheim, Germany
* All rights reserved.
*
* Author: Armin Schindler <armin.schindler@sysgo.com>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef __ITUN_DATA_H__
#define __ITUN_DATA_H__
#include "capiconn.h"
extern int data_sent;
extern time_t idle_last_use;
extern void handle_if_data(void);
extern void empty_interface(void);
extern void handle_capi_data(capi_connection *con, unsigned char* data, unsigned int len);
extern void handle_capi_sent(capi_connection *con, unsigned char* data);
extern void capi_is_connected(capi_connection *con);
extern void capi_is_disconnected(capi_connection *con);
extern int is_connected(void);
#endif /* __ITUN_DATA_H__ */

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/*
* Debug handling
*
* Copyright 2004 SYSGO Real-Time Solutions AG
* Klein-Winternheim, Germany
* All rights reserved.
*
* Author: Armin Schindler <armin.schindler@sysgo.com>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <syslog.h>
#include "isdntun.h"
#include "options.h"
int debug_level = 2;
/*
* syslog
*/
static void do_syslog(int prio, char *format, va_list ap)
{
unsigned char buf[2048];
int len;
len = sprintf(buf, "%s: ", opt_name);
vsnprintf(buf + len, sizeof(buf), format, ap);
syslog(prio, buf);
}
/*
* debug
*/
static void debug_output(int level, char *format, va_list ap)
{
switch (level) {
case 0:
case 1:
case 2:
do_syslog(LOG_ERR, format, ap);
break;
case 3:
do_syslog(LOG_INFO, format, ap);
break;
}
if (level > debug_level)
return;
fprintf(stderr, "Itun %d: ", level);
vfprintf(stderr, format, ap);
fprintf(stderr, "\n");
}
void option_error(char *format, ...)
{
va_list ap;
va_start(ap, format);
debug_output(0, format, ap);
va_end(ap);
}
void fatal(char *format, ...)
{
va_list ap;
va_start(ap, format);
debug_output(1, format, ap);
va_end(ap);
exit(-1);
}
void error(char *format, ...)
{
va_list ap;
va_start(ap, format);
debug_output(2, format, ap);
va_end(ap);
}
void info(char *format, ...)
{
va_list ap;
va_start(ap, format);
debug_output(3, format, ap);
va_end(ap);
}
void dbglog(char *format, ...)
{
va_list ap;
va_start(ap, format);
debug_output(4, format, ap);
va_end(ap);
}

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/*
* Debug handling
*
* Copyright 2004 SYSGO Real-Time Solutions AG
* Klein-Winternheim, Germany
* All rights reserved.
*
* Author: Armin Schindler <armin.schindler@sysgo.com>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef __ITUN_DEBUG_H__
#define __ITUN_DEBUG_H__
/*
* debug
*/
extern int debug_level;
extern void fatal(char *format, ...);
extern void error(char *format, ...);
extern void info(char *format, ...);
extern void dbglog(char *format, ...);
extern void option_error(char *format, ...);
#endif /* __ITUN_DEBUG_H__ */

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/*
* ISDN tunnel Daemon "ItunD"
*
* Copyright 2004-2005 SYSGO Real-Time Solutions AG
* Klein-Winternheim, Germany
* All rights reserved.
*
* Author: Armin Schindler <armin.schindler@sysgo.com>
*
* Copyright 2004-2005 Cytronics & Melware
*
* Armin Schindler <armin@melware.de>
*
* $Id$
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/time.h>
#include <sys/types.h>
#include <getopt.h>
#include <syslog.h>
#include <sys/select.h>
#include "isdntun.h"
#include "options.h"
#include "signals.h"
#include "tun.h"
static char pid_file[128];
int if_fd;
int capi_fd;
int status = EXIT_OK;
int iphase = PHASE_DEAD;
void new_phase(int phase)
{
iphase = phase;
capi_new_phase(phase);
}
/*
* exit
*/
void die(int val)
{
error("die with %d", val);
itun_close(if_fd);
itun_exit();
unlink(pid_file);
exit(val);
}
/*
* usage
*/
static void usage(char *prg)
{
fprintf(stderr, "ISDN-Tunnel Daemon Version %s (c) 2004-2005 Cytronics & Melware, SYSGO AG\n", VERSION);
fprintf(stderr, "usage: %s <option> <option> ...\n", prg);
fprintf(stderr, "options:\n");
fprintf(stderr, " -D Don't daemonize into background\n");
fprintf(stderr, " -d <level> Set debug level (%d)\n", debug_level);
fprintf(stderr, " --encap=<arg> Encapsulation (ether, rawip, zipip)\n");
fprintf(stderr, " --controller=<arg> CAPI controller specification\n");
fprintf(stderr, " --ddi=<arg,len> DDI-number,DDI-length\n");
fprintf(stderr, " --protcol=<arg> Protocol (x75, hdlc)\n");
fprintf(stderr, " --number=<arg> Number to call\n");
fprintf(stderr, " (may be comma separated list)\n");
fprintf(stderr, " --numberprefix=<arg> Prefix for number\n");
fprintf(stderr, " --msn=<arg> Number to call from\n");
fprintf(stderr, " --inmsn=<arg> Called number for incoming calls\n");
fprintf(stderr, " --cli=<arg> Calling number for incoming calls\n");
fprintf(stderr, " (may be comma separated list)\n");
fprintf(stderr, " --clicb Call number and wait for callback\n");
fprintf(stderr, " --cbwait=<arg> Number of seconds to wait for callback\n");
fprintf(stderr, " --dialtimeout=<arg> Number of seconds to wait for connection\n");
fprintf(stderr, " or reject\n");
fprintf(stderr, " --dialmax=<arg> Number of dial retries\n");
fprintf(stderr, " --redialdelay=<arg> Number of seconds to wait between dial retries\n");
fprintf(stderr, " --channels=<arg> Channel to use for leased line\n");
fprintf(stderr, " (may be comma separated list)\n");
fprintf(stderr, " --cbdelay=<arg> Number of seconds to wait before calling back\n");
fprintf(stderr, " --cbnumber=<arg> Number to call (may be comma separated list)\n");
fprintf(stderr, " --connectdelay=<arg> Number of seconds to wait after connection is established\n");
fprintf(stderr, " --acceptdelay Wait 1 second before accept incoming call\n");
fprintf(stderr, " --coso=<arg> COSO: caller,local or remote\n");
fprintf(stderr, " --voicecallwakeup Call number and wait for callback\n");
fprintf(stderr, " --demand Establish connection on demand only\n");
fprintf(stderr, " --nopersist Exit after connection\n");
fprintf(stderr, " --idle=<arg> Number of idle seconds before hangup (%d)\n", opt_idle);
fprintf(stderr, " --name=<arg> Personal name for this connection\n");
fprintf(stderr, " --ifup=<arg> Script to be called when interface is up\n");
fprintf(stderr, " called with arguments <if-name> <given-name>\n");
fprintf(stderr, "\n");
}
/*
* long options list
*/
static struct option itun_options[] = {
{ "help", no_argument, NULL, 0x100 },
{ "encap", required_argument, NULL, 0x101 },
{ "controller", required_argument, NULL, 0x102 },
{ "number", required_argument, NULL, 0x103 },
{ "numberprefix", required_argument, NULL, 0x104 },
{ "msn", required_argument, NULL, 0x105 },
{ "protocol", required_argument, NULL, 0x106 },
{ "inmsn", required_argument, NULL, 0x107 },
{ "cli", required_argument, NULL, 0x108 },
{ "clicb", no_argument, NULL, 0x109 },
{ "cbwait", required_argument, NULL, 0x10A },
{ "dialtimeout", required_argument, NULL, 0x10B },
{ "dialmax", required_argument, NULL, 0x10C },
{ "redialdelay", required_argument, NULL, 0x10D },
{ "channels", required_argument, NULL, 0x10E },
{ "cbdelay", required_argument, NULL, 0x10F },
{ "cbnumber", required_argument, NULL, 0x110 },
{ "connectdelay", required_argument, NULL, 0x111 },
{ "acceptdelay", no_argument, NULL, 0x112 },
{ "coso", required_argument, NULL, 0x113 },
{ "voicecallwakup", no_argument, NULL, 0x114 },
{ "demand", no_argument, NULL, 0x115 },
{ "idle", required_argument, NULL, 0x116 },
{ "nopersist", no_argument, NULL, 0x117 },
{ "name", required_argument, NULL, 0x118 },
{ "ddi", required_argument, NULL, 0x119 },
{ "ifup", required_argument, NULL, 0x11A },
{ NULL, 0, NULL, 0 }
};
/*
* capi wants wake up
*/
void capi_wake_up(void)
{
Dialsignal = 1;
dbglog("capi_wake_up");
}
/*
* main loop of connection handling
*/
static void connection_handling(void)
{
fd_set rfds;
struct timeval tv;
int ret;
int maxfd;
FD_ZERO(&rfds);
FD_SET(capi_fd, &rfds);
maxfd = capi_fd;
if (((iphase == PHASE_RUNNING) && (data_sent)) ||
(iphase == PHASE_DORMANT)) {
FD_SET(if_fd, &rfds);
if (if_fd > capi_fd)
maxfd = if_fd;
}
tv.tv_sec = 1;
tv.tv_usec = 0;
ret = select(maxfd + 1, &rfds, NULL, NULL, &tv);
if (ret > 0) {
if (FD_ISSET(capi_fd, &rfds)) {
dbglog("capi_fd in select");
handle_capi_message();
}
if (FD_ISSET(if_fd, &rfds)) {
dbglog("if_fd in select");
if (is_connected())
handle_if_data();
else
Dialsignal = 1;
}
}
}
/*
* MAIN
*/
int main(int argc, char *argv[])
{
int c;
FILE *f;
while ((c = getopt_long(argc, argv, "?hDd:", itun_options, (int *)0)) != EOF) {
switch(c) {
case 'D': /* don't daemonize */
daemonize = 0;
break;
case 'd': /* debug level */
debug_level = strtol(optarg, NULL, 0);
break;
case 0x101: /* encap */
opt_encap = strdup(optarg);
break;
case 0x102: /* controller */
opt_controller = strdup(optarg);
break;
case 0x103: /* number */
opt_number = strdup(optarg);
break;
case 0x104: /* numberprefix */
opt_numberprefix = strdup(optarg);
break;
case 0x105: /* msn */
opt_msn = strdup(optarg);
break;
case 0x106: /* protocol */
opt_proto = strdup(optarg);
break;
case 0x107: /* inmsn */
opt_inmsn = strdup(optarg);
break;
case 0x108: /* cli */
opt_cli = strdup(optarg);
break;
case 0x109: /* clicb */
opt_cbflag = 1;
break;
case 0x10A: /* cbwait */
opt_cbwait = strtol(optarg, NULL, 0);
break;
case 0x10B: /* dialtimeout */
opt_dialtimeout = strtol(optarg, NULL, 0);
break;
case 0x10C: /* dialmax */
opt_dialmax = strtol(optarg, NULL, 0);
break;
case 0x10D: /* redialdelay */
opt_redialdelay = strtol(optarg, NULL, 0);
break;
case 0x10E: /* channels */
opt_channels = strdup(optarg);
break;
case 0x10F: /* cbdelay */
opt_cbdelay = strtol(optarg, NULL, 0);
break;
case 0x110: /* cbnumber */
opt_callbacknumber = strdup(optarg);
break;
case 0x111: /* connectdelay */
opt_connectdelay = strtol(optarg, NULL, 0);
break;
case 0x112: /* acceptdelay */
opt_acceptdelayflag = 1;
break;
case 0x113: /* coso */
opt_coso = strdup(optarg);
break;
case 0x114: /* voicecallwakeup */
opt_voicecallwakeup = 1;
break;
case 0x115: /* demand */