Initial checkin of version 0.3 -- started at sourceforge.

This commit is contained in:
MelwareDE 2005-05-31 17:30:59 +00:00
parent cc34b2666e
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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
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
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convey the exclusion of warranty; and each file should have at least
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<one line to give the program's name and a brief idea of what it does.>
Copyright (C) 19yy <name of author>
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.
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.
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
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Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
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You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
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
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
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 */
demand = 1;
break;
case 0x116: /* idle */
opt_idle = strtol(optarg, NULL, 0);
break;
case 0x117: /* nopersist */
opt_persist = 0;
break;
case 0x118: /* name */
opt_name = strdup(optarg);
break;
case 0x119: /* ddi */
opt_ddi = strdup(optarg);
break;
case 0x11A: /* ifup */
opt_ifup = strdup(optarg);
break;
default:
fprintf(stderr, "Unknown option %c\n", c);
/* fall through */
case 0x100: /* help */
case 'h':
case '?':
usage(argv[0]);
return(-1);
}
}
/* open syslog */
openlog("ItunD", LOG_PID, LOG_DAEMON);
if (!check_global_options()) {
usage(argv[0]);
return(-1);
}
debug_options();
signal_setup();
if ((if_fd = itun_alloc(dev_name, ether_flag)) < 0) {
perror("open alloc tun device");
return(-1);
}
if (!opt_name)
opt_name = strdup(dev_name);
if ((capi_fd = itun_init()) < 0) {
perror("init capi");
itun_close(if_fd);
return(-1);
}
if (daemonize) {
/* make us a daemon in the background */
switch(fork()) {
case 0: /* fork ok - we are the child */
close(0);
close(1);
dbglog("forked with pid %d", getpid());
syslog(LOG_INFO, "%s: started", opt_name);
break;
case -1: /* fork error */
perror("fork");
exit(errno);
break;
default: /* fork ok - parent ends here */
dbglog("child forked, parent ends.");
printf("%s\n", dev_name);
return(0);
}
} else {
syslog(LOG_INFO, "%s: started", opt_name);
printf("%s\n", dev_name);
}
/* create pid file */
snprintf(pid_file, sizeof(pid_file)-1, "/var/run/%s.pid", dev_name);
if ((f = fopen(pid_file, "w+")) != NULL) {
fprintf(f, "%d\n", getpid());
fclose(f);
}
new_phase(PHASE_DORMANT);
/* run script to "interface-up" */
if (opt_ifup) {
char ifup_script[256];
sprintf(ifup_script, "%s %s %s",
opt_ifup, dev_name, opt_name);
system(ifup_script);
}
/* if demand is not enabled, force dial */
if (!demand) {
Dialsignal = 1;
}
/* main loop */
while (!Terminate) {
if (Hupsignal) {
Hupsignal = 0;
if (iphase == PHASE_RUNNING) {
new_phase(PHASE_DEAD);
}
}
if (Dialsignal) {
Dialsignal = 0;
if (iphase == PHASE_DORMANT) {
new_phase(PHASE_SERIALCONN);
if (iphase != PHASE_RUNNING) {
/* connection not established, so we clean up IF */
empty_interface();
}
}
}
/* TODO: if the netif is down, hangup/reject call */
connection_handling();
if (iphase == PHASE_DISCONNECT) {
if (opt_persist) {
new_phase(PHASE_DORMANT);
} else {
Terminate = 1;
}
}
/* check idle time */
if ((iphase == PHASE_RUNNING) &&
(opt_idle) &&
((opt_idle + idle_last_use) < time(NULL))) {
info("idle for %d seconds, hanging up", opt_idle);
Hupsignal = 1;
}
}
new_phase(PHASE_TERMINATE);
itun_close(if_fd);
itun_exit();
unlink(pid_file);
closelog();
return(0);
}

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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.
*/
#ifndef __ISDNTUN_H__
#define __ISDNTUN_H__
#include "debug.h"
#include "data.h"
extern void die(int val);
extern int status;
extern int iphase;
extern int itun_init(void);
extern void itun_exit(void);
extern int capi_new_phase(int phase);
extern void capi_wake_up(void);
extern void new_phase(int phase);
extern int if_fd;
extern int capi_fd;
extern void handle_capi_message(void);
/*
* Values for phase.
*/
#define PHASE_DEAD 0
#define PHASE_INITIALIZE 1
#define PHASE_SERIALCONN 2
#define PHASE_DORMANT 3
#define PHASE_ESTABLISH 4
#define PHASE_AUTHENTICATE 5
#define PHASE_CALLBACK 6
#define PHASE_NETWORK 7
#define PHASE_RUNNING 8
#define PHASE_TERMINATE 9
#define PHASE_DISCONNECT 10
#define PHASE_HOLDOFF 11
/*
* Exit status values.
*/
#define EXIT_OK 0
#define EXIT_FATAL_ERROR 1
#define EXIT_OPTION_ERROR 2
#define EXIT_NOT_ROOT 3
#define EXIT_NO_KERNEL_SUPPORT 4
#define EXIT_USER_REQUEST 5
#define EXIT_LOCK_FAILED 6
#define EXIT_OPEN_FAILED 7
#define EXIT_CONNECT_FAILED 8
#define EXIT_PTYCMD_FAILED 9
#define EXIT_NEGOTIATION_FAILED 10
#define EXIT_PEER_AUTH_FAILED 11
#define EXIT_IDLE_TIMEOUT 12
#define EXIT_CONNECT_TIME 13
#define EXIT_CALLBACK 14
#define EXIT_PEER_DEAD 15
#define EXIT_HANGUP 16
#define EXIT_LOOPBACK 17
#define EXIT_INIT_FAILED 18
#define EXIT_AUTH_TOPEER_FAILED 19
#define EXIT_TRAFFIC_LIMIT 20
#define EXIT_CNID_AUTH_FAILED 21
#endif /* __ISDNTUN_H__ */

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/*
* Command line option 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 <strings.h>
#include "isdntun.h"
#include "options.h"
int daemonize = 1;
char *opt_encap = "ether";
char *opt_controller;
char *opt_numberprefix = 0;
char *opt_number = 0;
char *opt_callbacknumber = 0;
char *opt_msn = 0;
char *opt_inmsn = 0;
char *opt_cli = 0;
char *opt_proto = "hdlc";
char *opt_channels = 0;
char *opt_coso = 0;
char *opt_ddi = 0;
int opt_dialtimeout = 10;
int opt_dialmax = 3;
int opt_redialdelay = 5;
int opt_cbdelay = 2;
int opt_cbflag = 0;
int opt_cbwait = 20;
int opt_connectdelay = 0;
int opt_acceptdelayflag = 0;
int opt_voicecallwakeup = 0;
int demand = 0;
int opt_idle = 300;
int opt_persist = 1;
int encap = ENCAP_ETHER;
int ether_flag = 1;
char *opt_name = NULL;
char *opt_ifup = NULL;
/*
* show options
*/
void debug_options(void)
{
dbglog("daemonize = %4d", daemonize);
dbglog("debug_level = %4d", debug_level);
dbglog("name = %s", opt_name);
dbglog("idle = %4d", opt_idle);
dbglog("encap = %s", opt_encap);
dbglog("controller = %s", opt_controller);
dbglog("ddi = %s", opt_ddi);
dbglog("numberprefix = %s", opt_numberprefix);
dbglog("number = %s", opt_number);
dbglog("callbacknumber = %s", opt_callbacknumber);
dbglog("msn = %s", opt_msn);
dbglog("inmsn = %s", opt_inmsn);
dbglog("cli = %s", opt_cli);
dbglog("proto = %s", opt_proto);
dbglog("channels = %s", opt_channels);
dbglog("coso = %s", opt_coso);
dbglog("dialtimeout = %4d", opt_dialtimeout);
dbglog("dialmax = %4d", opt_dialmax);
dbglog("redialdelay = %4d", opt_redialdelay);
dbglog("cbdelay = %4d", opt_cbdelay);
dbglog("clicb = %4d", opt_cbflag);
dbglog("cbwait = %4d", opt_cbwait);
dbglog("connectdelay = %4d", opt_connectdelay);
dbglog("acceptdelay = %4d", opt_acceptdelayflag);
dbglog("voicecallwakeup = %4d", opt_voicecallwakeup);
dbglog("demand = %4d", demand);
dbglog("persist = %4d", opt_persist);
}
int check_global_options(void)
{
/*
* encapsulation
*/
if (strcasecmp(opt_encap, "ether") == 0) {
encap = ENCAP_ETHER;
ether_flag = 1;
} else if (strcasecmp(opt_encap, "rawip") == 0) {
encap = ENCAP_RAWIP;
ether_flag = 0;
} else if (strcasecmp(opt_encap, "zipip") == 0) {
encap = ENCAP_ZIPIP;
ether_flag = 0;
} else {
option_error("unknown encap \"%s\"", opt_encap);
die(1);
}
return(1);
}

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/*
* Command line option 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_OPTIONS_H__
#define __ITUN_OPTIONS_H__
#define ENCAP_ETHER 0
#define ENCAP_RAWIP 1
#define ENCAP_ZIPIP 2
extern int daemonize;
extern char *opt_encap;
extern char *opt_controller;
extern char *opt_numberprefix;
extern char *opt_number;
extern char *opt_callbacknumber;
extern char *opt_msn;
extern char *opt_inmsn;
extern char *opt_cli;
extern char *opt_proto;
extern char *opt_channels;
extern char *opt_coso;
extern char *opt_ddi;
extern int opt_dialtimeout;
extern int opt_dialmax;
extern int opt_redialdelay;
extern int opt_cbdelay;
extern int opt_cbflag;
extern int opt_cbwait;
extern int opt_connectdelay;
extern int opt_acceptdelayflag;
extern int opt_voicecallwakeup;
extern int demand;
extern int opt_idle;
extern int opt_persist;
extern int encap;
extern int ether_flag;
extern char *opt_name;
extern char *opt_ifup;
extern void debug_options(void);
extern int check_global_options(void);
#endif /* __ITUN_OPTIONS_H__ */

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/*
* Signal 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 <string.h>
#include <ctype.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <isdntun.h>
int Terminate = 0;
int Hupsignal = 0;
int Dialsignal = 0;
/*
* SIGTERM signal handler
*/
static void sig_term(int sig)
{
dbglog("Got signal TERM/INT");
Terminate = 1;
status = EXIT_USER_REQUEST;
}
/*
* SIGHUP signal handler
*/
static void sig_hup(int sig)
{
dbglog("Got signal HUP");
Hupsignal = 1;
}
/*
* SIGUSR1 signal handler
*/
static void sig_usr1(int sig)
{
dbglog("Got signal USR1");
Dialsignal = 1;
}
/*
* SIGUSR2 signal handler
*/
static void sig_usr2(int sig)
{
dbglog("Got signal USR2");
}
/*
* SIGCHLD
*/
static void sig_chld(int sig)
{
dbglog("Got signal CHLD");
}
/*
* setup the signal handlers
*/
void signal_setup(void)
{
sigset_t mask;
struct sigaction sa;
sigemptyset(&mask);
sigaddset(&mask,SIGHUP);
sigaddset(&mask,SIGTERM);
sigaddset(&mask,SIGINT);
sigaddset(&mask,SIGUSR1);
sigaddset(&mask,SIGUSR2);
sigaddset(&mask,SIGCHLD);
#define SIGNAL(s, handler) { \
sa.sa_handler = handler; \
if (sigaction(s, &sa , NULL) < 0) { \
fatal("ERROR setting up the signal handlers"); \
exit(-2); \
} \
}
sa.sa_mask = mask;
sa.sa_flags = 0;
SIGNAL(SIGHUP, sig_hup);
SIGNAL(SIGTERM, sig_term);
SIGNAL(SIGINT, sig_term);
SIGNAL(SIGUSR1, sig_usr1);
SIGNAL(SIGUSR2, sig_usr2);
SIGNAL(SIGCHLD, sig_chld);
}

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/*
* Signal 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_SIGNALS_H__
#define __ITUN_SIGNALS_H__
extern int Terminate;
extern int Hupsignal;
extern int Dialsignal;
/*
* setup the signal handlers
*/
extern void signal_setup(void);
#endif /* __ITUN_SIGNALS_H__ */

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/*
* TUN/TAP driver interface 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 <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <linux/if.h>
#include <linux/if_tun.h>
unsigned char dev_name[IFNAMSIZ] = {"isdn%d"};
int itun_alloc(char *dev, int ether)
{
struct ifreq ifr;
int fd, err;
if((fd = open("/dev/net/tun", O_RDWR)) >= 0) {
memset(&ifr, 0, sizeof(ifr));
/* Flags: IFF_TUN - TUN device (no Ethernet headers, PTP)
* IFF_TAP - TAP device (with Ethernet headers)
*
* IFF_NO_PI - Do not provide packet information
*/
ifr.ifr_flags = (ether) ? IFF_TAP : IFF_TUN;
ifr.ifr_flags |= IFF_NO_PI;
if (*dev)
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
if((err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0) {
close(fd);
return(err);
}
strcpy(dev, ifr.ifr_name);
}
return(fd);
}
void itun_close(int fd)
{
close(fd);
}

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/*
* TUN/TAP driver interface 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 __TUN_H__
#define __TUN_H__
extern unsigned char dev_name[];
extern int itun_alloc(char *dev, int ether);
extern void itun_close(int fd);
#endif