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qttermtcp/ax25.h

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First GIT Commit
2022-08-30 11:28:28 +01:00
// ax.25 code for QtTERMTCP KISS Mode
// based on SoundModem/QtSoundModem ax.25 code
// The underlying code allows for up to four KISS ports, but at the moment
// the config and user interface only supports 1
// The code supports KISS over a Serial port or TCP connection
#include <string.h>
#include <stdlib.h>
#include <math.h>
#include <stdio.h>
#include <ctype.h>
#include <time.h>
#define UNUSED(x) (void)(x)
#define single float
#define boolean int
#define Byte unsigned char // 0 to 255
#define Word unsigned short // 0 to 65,535
#define SmallInt short // -32,768 to 32,767
#define LongWord unsigned int // 0 to 4,294,967,295
// Int6 : Cardinal; // 0 to 4,294,967,295
#define LongInt int // -2,147,483,648 to 2,147,483,647
#define Integer int // -2,147,483,648 to 2,147,483,647
//#define Int64 long long // -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
//#define Byte unsigned char // 0 to 255
#define word unsigned short // 0 to 65,535
#define smallint short // -32,768 to 32,767
#define longword unsigned int // 0 to 4,294,967,295
// Int6 : Cardinal; // 0 to 4,294,967,295
#define longint int // -2,147,483,648 to 2,147,483,647
#define integer int // -2,147,483,648 to 2,147,483,647
typedef unsigned long ULONG;
#define UCHAR unsigned char
#define UINT unsigned int
#define BOOL int
#define TRUE 1
#define FALSE 0
#define FEND 0xc0
#define FESC 0xDB
#define TFEND 0xDC
#define TFESC 0xDD
#define port_num 32 // ?? Max AGW sessions
#define PKT_ERR 15 // Minimum packet size, bytes
#define I_MAX 7 // Maximum number of packets
// Status flags
#define STAT_NO_LINK 0
#define STAT_LINK 1
#define STAT_CHK_LINK 2
#define STAT_WAIT_ANS 3
#define STAT_TRY_LINK 4
#define STAT_TRY_UNLINK 5
// <20>md,Resp,Poll,Final,Digipeater flags
#define SET_P 1
#define SET_F 0
#define SET_C 1
#define SET_R 0
#define SET_NO_RPT 0
#define SET_RPT 1
// Frame ID flags
#define I_FRM 0
#define S_FRM 1
#define U_FRM 2
#define I_I 0
#define S_RR 1
#define S_RNR 5
#define S_REJ 9
#define S_SREJ 0x0D
#define U_SABM 47
#define U_DISC 67
#define U_DM 15
#define U_UA 99
#define U_FRMR 135
#define U_UI 3
// PID flags
#define PID_X25 0x01 // 00000001-CCIT X25 PLP
#define PID_SEGMENT 0x08 // 00001000-Segmentation fragment
#define PID_TEXNET 0xC3 // 11000011-TEXNET Datagram Protocol
#define PID_LQ 0xC4 // 11001000-Link Quality Protocol
#define PID_APPLETALK 0xCA // 11001010-Appletalk
#define PID_APPLEARP 0xCB // 11001011-Appletalk ARP
#define PID_IP 0xCC // 11001100-ARPA Internet Protocol
#define PID_ARP 0xCD // 11001101-ARPA Address Resolution Protocol
#define PID_NET_ROM 0xCF // 11001111-NET/ROM
#define FX25_LOAD 1
#define MODE_OUR 0
#define MODE_OTHER 1
#define MODE_RETRY 2
#define TIMER_FREE 0
#define TIMER_BUSY 1
#define TIMER_OFF 2
#define TIMER_EVENT_ON 3
#define TIMER_EVENT_OFF 4
typedef struct string_T
{
unsigned char * Data;
int Length;
int AllocatedLength; // A reasonable sized block is allocated at the start to speed up adding chars
}string;
typedef struct TStringList_T
{
int Count;
string ** Items;
} TStringList;
typedef struct AGWUser_t
{
void *socket;
string * data_in;
TStringList AGW_frame_buf;
boolean Monitor;
boolean Monitor_raw;
boolean reportFreqAndModem; // Can report modem and frequency to host
} AGWUser;
typedef struct TAX25Info_t
{
longint stat_s_pkt;
longint stat_s_byte;
longint stat_r_pkt;
longint stat_r_byte;
longint stat_r_fc;
longint stat_fec_count;
time_t stat_begin_ses;
time_t stat_end_ses;
longint stat_l_r_byte;
longint stat_l_s_byte;
} TAX25Info;
typedef struct TAX25Port_t
{
Byte hi_vs;
Byte vs;
Byte vr;
Byte PID;
TStringList in_data_buf;
TStringList frm_collector;
string frm_win[8];
string out_data_buf;
word t1;
word t2;
word t3;
Byte i_lo;
Byte i_hi;
word n1;
word n2;
word IPOLL_cnt;
TStringList frame_buf; //<2F><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
TStringList I_frame_buf;
Byte status;
word clk_frack;
char corrcall[10];
char mycall[10];
UCHAR digi[56];
UCHAR Path[80]; // Path in ax25 format - added to save building it each time
UCHAR ReversePath[80];
int snd_ch; // Simplifies parameter passing
int port;
int pathLen;
void * socket;
void * Sess;
char kind[16];
TAX25Info info;
} TAX25Port;
typedef struct TKISSMode_t
{
string * data_in;
void * Socket; // Used as a key
// Not sure what rest are used for. Seems to be one per channel
TStringList buffer[4]; // Outgoing Frames
} TKISSMode;
// Dephi emulation functions
string * Strings(TStringList * Q, int Index);
void Clear(TStringList * Q);
int Count(TStringList * List);
string * newString();
string * copy(string * Source, int StartChar, int Count);
TStringList * newTStringList();
void freeString(string * Msg);
void initString(string * S);
void initTStringList(TStringList* T);
// Two delete() This is confusing!!
// Not really - one acts on String, other TStringList
void Delete(TStringList * Q, int Index);
void mydelete(string * Source, int StartChar, int Count);
void move(UCHAR * SourcePointer, UCHAR * DestinationPointer, int CopyCount);
void fmove(float * SourcePointer, float * DestinationPointer, int CopyCount);
void setlength(string * Msg, int Count); // Set string length
string * stringAdd(string * Msg, UCHAR * Chars, int Count); // Extend string
void Assign(TStringList * to, TStringList * from); // Duplicate from to to
string * duplicateString(string * in);
int my_indexof(TStringList * l, string * s);
boolean compareStrings(string * a, string * b);
int Add(TStringList * Q, string * Entry);
void Debugprintf(const char * format, ...);
void ax25_info_init(TAX25Port * AX25Sess);
void clr_frm_win(TAX25Port * AX25Sess);
void decode_frame(Byte * frame, int len, Byte * path, string * data,
Byte * pid, Byte * nr, Byte * ns, Byte * f_type, Byte * f_id,
Byte * rpt, Byte * pf, Byte * cr);
#ifdef __cplusplus
extern "C" void KISSSendtoServer(myTcpSocket* Socket, char * Data, int Length);
extern "C" void monitor_frame(int snd_ch, string * frame, char * code, int tx, int excluded);
extern "C" void WriteDebugLog(char * Mess);
extern "C" void SendtoTerm(Ui_ListenSession * Sess, char * Msg, int Len);
extern "C" void ClearSessLabel(Ui_ListenSession * Sess);
extern "C" void rst_timer(TAX25Port * AX25Sess);
extern "C" void Send_UI(int port, Byte PID, char * CallFrom, char *CallTo, Byte * Msg, int MsgLen);
#else
void monitor_frame(int snd_ch, string * frame, char * code, int tx, int excluded);
void SendtoTerm(void * Sess, char * Msg, int Len);
void ClearSessLabel(void * Sess);
void WriteDebugLog(char * Mess);
void AX25_disc(TAX25Port * AX25Sess, Byte mode);
void rst_timer(TAX25Port * AX25Sess);
void Send_UI(int port, Byte PID, char * CallFrom, char *CallTo, Byte * Msg, int MsgLen);
#endif
BOOL ConvToAX25(char * callsign, unsigned char * ax25call);
int ConvFromAX25(unsigned char * incall, char * outcall);
void reverse_addr(Byte * path, Byte * revpath, int Len);
void set_DM(int snd_ch, Byte * path);
void set_link(TAX25Port * AX25Sess, UCHAR * axpath);
boolean is_last_digi(Byte *path);
boolean is_correct_path(Byte * path, Byte pid);
int number_digi(unsigned char * path);
void AX25_conn(TAX25Port * AX25Sess, int snd_ch, Byte mode);
void write_ax25_info(TAX25Port * AX25Sess);
void rst_values(TAX25Port * AX25Sess);
#ifdef __cplusplus
extern "C"
{
#endif
extern boolean dyn_frack[4];
extern Byte recovery[4];
extern Byte users[4];
extern int resptime[4];
extern int slottime[4];
extern int persist[4];
extern int kisspaclen[4];
extern int fracks[4];
extern int frack_time[4];
extern int idletime[4];
extern int redtime[4];
extern int IPOLL[4];
extern int maxframe[4];
extern int TXFrmMode[4];
extern char MyDigiCall[4][512];
extern char exclude_callsigns[4][512];
extern char exclude_APRS_frm[4][512];
extern TStringList list_exclude_callsigns[4];
extern TStringList list_exclude_APRS_frm[4];
extern TStringList list_digi_callsigns[4];
extern int max_frame_collector[4];
extern boolean KISS_opt[4];
extern TAX25Port AX25Port[4][port_num];
extern TStringList KISS_acked[];
extern TStringList KISS_iacked[];
#ifdef __cplusplus
}
#endif