/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/* Copyright (c) 2022/23 Siemens Mobility GmbH */
#ifndef _LINUX_GSMMUX_H
#define _LINUX_GSMMUX_H
#include <linux/const .h>
#include <linux/if .h>
#include <linux/ioctl.h>
#include <linux/types.h>
/*
* flags definition for n_gsm
*
* Used by :
* struct gsm_config_ext . flags
* struct gsm_dlci_config . flags
*/
/* Forces a DLCI reset if set. Otherwise, a DLCI reset is only done if
* incompatible settings were provided . Always cleared on retrieval .
*/
#define GSM_FL_RESTART _BITUL(0 )
/**
* struct gsm_config - n_gsm basic configuration parameters
*
* This structure is used in combination with GSMIOC_GETCONF and GSMIOC_SETCONF
* to retrieve and set the basic parameters of an n_gsm ldisc .
* struct gsm_config_ext can be used to configure extended ldisc parameters .
*
* All timers are in units of 1 / 100 th of a second .
*
* @ adaption : Convergence layer type
* @ encapsulation : Framing ( 0 = basic option , 1 = advanced option )
* @ initiator : Initiator or responder
* @ t1 : Acknowledgment timer
* @ t2 : Response timer for multiplexer control channel
* @ t3 : Response timer for wake - up procedure
* @ n2 : Maximum number of retransmissions
* @ mru : Maximum incoming frame payload size
* @ mtu : Maximum outgoing frame payload size
* @ k : Window size
* @ i : Frame type ( 1 = UIH , 2 = UI )
* @ unused : Can not be used
*/
struct gsm_config
{
unsigned int adaption;
unsigned int encapsulation;
unsigned int initiator;
unsigned int t1;
unsigned int t2;
unsigned int t3;
unsigned int n2;
unsigned int mru;
unsigned int mtu;
unsigned int k;
unsigned int i;
unsigned int unused[8 ];
};
#define GSMIOC_GETCONF _IOR('G' , 0 , struct gsm_config)
#define GSMIOC_SETCONF _IOW('G' , 1 , struct gsm_config)
/**
* struct gsm_netconfig - n_gsm network configuration parameters
*
* This structure is used in combination with GSMIOC_ENABLE_NET and
* GSMIOC_DISABLE_NET to enable or disable a network data connection
* over a mux virtual tty channel . This is for modems that support
* data connections with raw IP frames instead of PPP .
*
* @ adaption : Adaption to use in network mode .
* @ protocol : Protocol to use - only ETH_P_IP supported .
* @ unused2 : Can not be used .
* @ if_name : Interface name format string .
* @ unused : Can not be used .
*/
struct gsm_netconfig {
unsigned int adaption;
unsigned short protocol;
unsigned short unused2;
char if_name[IFNAMSIZ];
__u8 unused[28 ];
};
#define GSMIOC_ENABLE_NET _IOW('G' , 2 , struct gsm_netconfig)
#define GSMIOC_DISABLE_NET _IO('G' , 3 )
/* get the base tty number for a configured gsmmux tty */
#define GSMIOC_GETFIRST _IOR('G' , 4 , __u32)
/**
* struct gsm_config_ext - n_gsm extended configuration parameters
*
* This structure is used in combination with GSMIOC_GETCONF_EXT and
* GSMIOC_SETCONF_EXT to retrieve and set the extended parameters of an
* n_gsm ldisc .
*
* All timers are in units of 1 / 100 th of a second .
*
* @ keep_alive : Control channel keep - alive in 1 / 100 th of a second ( 0 to disable ) .
* @ wait_config : Wait for DLCI config before opening virtual link ?
* @ flags : Mux specific flags .
* @ reserved : For future use , must be initialized to zero .
*/
struct gsm_config_ext {
__u32 keep_alive;
__u32 wait_config;
__u32 flags;
__u32 reserved[5 ];
};
#define GSMIOC_GETCONF_EXT _IOR('G' , 5 , struct gsm_config_ext)
#define GSMIOC_SETCONF_EXT _IOW('G' , 6 , struct gsm_config_ext)
/**
* struct gsm_dlci_config - n_gsm channel configuration parameters
*
* This structure is used in combination with GSMIOC_GETCONF_DLCI and
* GSMIOC_SETCONF_DLCI to retrieve and set the channel specific parameters
* of an n_gsm ldisc .
*
* Set the channel accordingly before calling GSMIOC_GETCONF_DLCI .
*
* @ channel : DLCI ( 0 for the associated DLCI ) .
* @ adaption : Convergence layer type .
* @ mtu : Maximum transfer unit .
* @ priority : Priority ( 0 for default value ) .
* @ i : Frame type ( 1 = UIH , 2 = UI ) .
* @ k : Window size ( 0 for default value ) .
* @ flags : DLCI specific flags .
* @ reserved : For future use , must be initialized to zero .
*/
struct gsm_dlci_config {
__u32 channel;
__u32 adaption;
__u32 mtu;
__u32 priority;
__u32 i;
__u32 k;
__u32 flags;
__u32 reserved[7 ];
};
#define GSMIOC_GETCONF_DLCI _IOWR('G' , 7 , struct gsm_dlci_config)
#define GSMIOC_SETCONF_DLCI _IOW('G' , 8 , struct gsm_dlci_config)
#endif
Messung V0.5 in Prozent C=99 H=99 G=98
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(vorverarbeitet am 2026-09-29)
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