/*
* GSM 07.10 Implementation with User Space Serial Ports
*
* Code heavily based on gsmMuxd written by
* Copyright (C) 2003 Tuukka Karvonen <tkarvone@iki.fi>
* Modified November 2004 by David Jander <david@protonic.nl>
* Modified January 2006 by Tuukka Karvonen <tkarvone@iki.fi>
* Modified January 2006 by Antti Haapakoski <antti.haapakoski@iki.fi>
* Modified March 2006 by Tuukka Karvonen <tkarvone@iki.fi>
* Modified October 2006 by Vasiliy Novikov <vn@hotbox.ru>
*
* Copyright (C) 2008 M. Dietrich <mdt@emdete.de>
* Modified January 2009 by Ulrik Bech Hald <ubh@ti.com>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
/* If compiled with the MUX_ANDROID flag this mux will be enabled to run under Android */
/**************************/
/* INCLUDES */
/**************************/
#include <errno.h>
#include <fcntl.h>
//#include <features.h>
#include <paths.h>
#ifdef MUX_ANDROID
#include <pathconf.h>
#endif
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/poll.h>
#include <termios.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include <stdlib.h>
//#define XINGWANG_DEBUG
#ifdef XINGWANG_DEBUG
//#include "ct_linuxframwork_log.h"
#define ct_linuxframwork_radiolog(lvl, tag, f, ...) do {{fprintf(stderr,"%d:%s(): " f "\n", __LINE__, __FUNCTION__, ##__VA_ARGS__);}}while(0)
#endif
#ifdef MUX_ANDROID //full path is required on some boards, i donot know why
int ql_system(const char * string) {
char system_bin[100];
strcpy(system_bin, "/system/bin/");
strcat(system_bin, string);
return system(system_bin);
}
#else
#define ql_system system
#endif
/**************************/
/* DEFINES */
/**************************/
/* Logging */
#ifndef MUX_ANDROID
#include <syslog.h>
// #define LOG(lvl, f, ...) do{if(lvl<=syslog_level)syslog(lvl,"%s:%d:%s(): " f "\n", __FILE__, __LINE__, __FUNCTION__, ##__VA_ARGS__);}while(0)
#ifdef XINGWANG_DEBUG
#define DEBUG
#ifdef DEBUG
#define MUX_TAG "gsm0710"
#define LOGMUX(lvl,f,...) do {\
if (lvl <= LOG_ERR) {ct_linuxframwork_radiolog(CT_LOG_ERROR,MUX_TAG,f,##__VA_ARGS__);}\
else if (lvl <= LOG_WARNING) {ct_linuxframwork_radiolog(CT_LOG_WARN,MUX_TAG,f,##__VA_ARGS__);}\
else if (lvl <= LOG_INFO) {ct_linuxframwork_radiolog(CT_LOG_INFO,MUX_TAG,f,##__VA_ARGS__);}\
else if (lvl <= LOG_DEBUG) {ct_linuxframwork_radiolog(CT_LOG_DEBUG,MUX_TAG,f,##__VA_ARGS__);}\
else {};\
} while(0)
#define LOGMUXE(f,...) ct_linuxframwork_radiolog(CT_LOG_ERROR,MUX_TAG,f,##__VA_ARGS__)
#define LOGMUXW(f,...) ct_linuxframwork_radiolog(CT_LOG_WARN,MUX_TAG,f,##__VA_ARGS__)
#define LOGMUXD(f,...) ct_linuxframwork_radiolog(CT_LOG_DEBUG,MUX_TAG,f,##__VA_ARGS__)
#define LOGMUXI(f,...) ct_linuxframwork_radiolog(CT_LOG_INFO,MUX_TAG,f,##__VA_ARGS__)
#else
#define LOGMUX(lvl,f,...) do {} while(0)
#endif
#else
#define LOGMUX(lvl,f,...) do{if((lvl<=syslog_level) || ql_cmux_debug){\
if (logtofile){\
fprintf(muxlogfile,"%d:%s(): " f "\n", __LINE__, __FUNCTION__, ##__VA_ARGS__);\
fflush(muxlogfile);}\
else\
fprintf(stderr,"%d:%s(): " f "\n", __LINE__, __FUNCTION__, ##__VA_ARGS__);\
}\
}while(0)
#endif
#else //will enable logging using android logging framework (not to file)
#define LOG_TAG "RILC"
#include <utils/Log.h> //all Android LOG macros are defined here.
#define LOGMUX(lvl,f,...) do{if((lvl<=syslog_level) || ql_cmux_debug) {\
LOG_PRI(android_log_lvl_convert[lvl],LOG_TAG,"MUXD %d:%s(): " f, __LINE__, __FUNCTION__, ##__VA_ARGS__);}\
}while(0)
//just dummy defines since were not including syslog.h.
#define LOG_EMERG 0
#define LOG_ALERT 1
#define LOG_CRIT 2
#define LOG_ERR 3
#define LOG_WARNING 4
#define LOG_NOTICE 5
#define LOG_INFO 6
#define LOG_DEBUG 7
/* Android's log level are in opposite order of syslog.h */
int android_log_lvl_convert[8]={ANDROID_LOG_SILENT, /*8*/
ANDROID_LOG_SILENT, /*7*/
ANDROID_LOG_FATAL, /*6*/
ANDROID_LOG_ERROR,/*5*/
ANDROID_LOG_WARN,/*4*/
ANDROID_LOG_INFO,/*3*/
ANDROID_LOG_DEBUG,/*2*/
ANDROID_LOG_VERBOSE};/*1*/
#endif /*MUX_ANDROID*/
#define SYSCHECK(c) do{if((c)<0){LOGMUX(LOG_ERR,"%s %d system-error: '%s' (code: %d)", __func__, __LINE__, strerror(errno), errno);\
return -1;}\
}while(0)
/*MUX defines */
#define GSM0710_FRAME_FLAG 0xF9// basic mode flag for frame start and end
#define GSM0710_FRAME_ADV_FLAG 0x7E// advanced mode flag for frame start and end
#define GSM0710_FRAME_ADV_ESC 0x7D// advanced mode escape symbol
#define GSM0710_FRAME_ADV_ESC_COPML 0x20// advanced mode escape complement mask
#define GSM0710_FRAME_ADV_ESCAPED_SYMS { GSM0710_FRAME_ADV_FLAG, GSM0710_FRAME_ADV_ESC, 0x11, 0x91, 0x13, 0x93 }// advanced mode escaped symbols: Flag, Escape, XON and XOFF
// bits: Poll/final, Command/Response, Extension
#define GSM0710_PF 0x10//16
#define GSM0710_CR 0x02//2
#define GSM0710_EA 0x01//1
// type of frames
#define GSM0710_TYPE_SABM 0x2F//47 Set Asynchronous Balanced Mode
#define GSM0710_TYPE_UA 0x63//99 Unnumbered Acknowledgement
#define GSM0710_TYPE_DM 0x0F//15 Disconnected Mode
#define GSM0710_TYPE_DISC 0x43//67 Disconnect
#define GSM0710_TYPE_UIH 0xEF//239 Unnumbered information with header check
#define GSM0710_TYPE_UI 0x03//3 Unnumbered Acknowledgement
// control channel commands
#define GSM0710_CONTROL_PN (0x80|GSM0710_EA)//?? DLC parameter negotiation
#define GSM0710_CONTROL_CLD (0xC0|GSM0710_EA)//193 Multiplexer close down
#define GSM0710_CONTROL_PSC (0x40|GSM0710_EA)//??? Power Saving Control
#define GSM0710_CONTROL_TEST (0x20|GSM0710_EA)//33 Test Command
#define GSM0710_CONTROL_MSC (0xE0|GSM0710_EA)//225 Modem Status Command
#define GSM0710_CONTROL_NSC (0x10|GSM0710_EA)//17 Non Supported Command Response
#define GSM0710_CONTROL_RPN (0x90|GSM0710_EA)//?? Remote Port Negotiation Command
#define GSM0710_CONTROL_RLS (0x50|GSM0710_EA)//?? Remote Line Status Command
#define GSM0710_CONTROL_SNC (0xD0|GSM0710_EA)//?? Service Negotiation Command
// V.24 signals: flow control, ready to communicate, ring indicator,
// data valid
#define GSM0710_SIGNAL_FC 0x02
#define GSM0710_SIGNAL_RTC 0x04
#define GSM0710_SIGNAL_RTR 0x08
#define GSM0710_SIGNAL_IC 0x40//64
#define GSM0710_SIGNAL_DV 0x80//128
#define GSM0710_SIGNAL_DTR 0x04
#define GSM0710_SIGNAL_DSR 0x04
#define GSM0710_SIGNAL_RTS 0x08
#define GSM0710_SIGNAL_CTS 0x08
#define GSM0710_SIGNAL_DCD 0x80//128
//
#define GSM0710_COMMAND_IS(type, command) ((type & ~GSM0710_CR) == command)
#define GSM0710_FRAME_IS(type, frame) ((frame->control & ~GSM0710_PF) == type)
#ifndef min
#define min(a,b) ((a < b) ? a :b)
#endif
#define GSM0710_WRITE_RETRIES 5
#define GSM0710_MAX_CHANNELS 4
// Defines how often the modem is polled when automatic restarting is
// enabled The value is in seconds
#define GSM0710_POLLING_INTERVAL 5
#define GSM0710_BUFFER_SIZE 4096
static int write_frame(
int chann
