[proxmark3-svn] / client / graph.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Graph utilities
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include "ui.h"
#include "graph.h"
#include "lfdemod.h"
#include "cmddata.h" //for g_debugmode

int GraphBuffer[MAX_GRAPH_TRACE_LEN];
int GraphTraceLen;
/* write a manchester bit to the graph */
void AppendGraph(int redraw, int clock, int bit)
{
  int i;
  //set first half the clock bit (all 1's or 0's for a 0 or 1 bit) 
  for (i = 0; i < (int)(clock / 2); ++i)
    GraphBuffer[GraphTraceLen++] = bit ;
  //set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
  for (i = (int)(clock / 2); i < clock; ++i)
    GraphBuffer[GraphTraceLen++] = bit ^ 1;

  if (redraw)
    RepaintGraphWindow();
}

// clear out our graph window
int ClearGraph(int redraw)
{
  int gtl = GraphTraceLen;
  memset(GraphBuffer, 0x00, GraphTraceLen);

  GraphTraceLen = 0;

  if (redraw)
    RepaintGraphWindow();

  return gtl;
}
// option '1' to save GraphBuffer any other to restore
void save_restoreGB(uint8_t saveOpt)
{
	static int SavedGB[MAX_GRAPH_TRACE_LEN];
	static int SavedGBlen;
	static bool GB_Saved = false;

	if (saveOpt==1) { //save
		memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
		SavedGBlen = GraphTraceLen;
		GB_Saved=true;
	} else if (GB_Saved){ //restore
		memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
		GraphTraceLen = SavedGBlen;
		RepaintGraphWindow();
	}
	return;
}

// DETECT CLOCK NOW IN LFDEMOD.C

void setGraphBuf(uint8_t *buff, size_t size)
{
	if ( buff == NULL ) return;
	
	uint16_t i = 0;  
	if ( size > MAX_GRAPH_TRACE_LEN )
		size = MAX_GRAPH_TRACE_LEN;
	ClearGraph(0);
	for (; i < size; ++i){
		GraphBuffer[i]=buff[i]-128;
	}
	GraphTraceLen=size;
	RepaintGraphWindow();
	return;
}
size_t getFromGraphBuf(uint8_t *buff)
{
	if (buff == NULL ) return 0;
	uint32_t i;
	for (i=0;i<GraphTraceLen;++i){
		if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
		if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
		buff[i]=(uint8_t)(GraphBuffer[i]+128);
	}
	return i;
}

// A simple test to see if there is any data inside Graphbuffer. 
bool HasGraphData(){

	if ( GraphTraceLen <= 0) {
		PrintAndLog("No data available, try reading something first");
		return false;
	}
	return true;	
}

// Detect high and lows in Grapbuffer.
// Only loops the first 256 values. 
void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {

	uint8_t loopMax = 255;
	if ( loopMax > GraphTraceLen)
		loopMax = GraphTraceLen;
  
	for (uint8_t i = 0; i < loopMax; ++i) {
		if (GraphBuffer[i] > *high)
			*high = GraphBuffer[i];
		else if (GraphBuffer[i] < *low)
			*low = GraphBuffer[i];
	}
	
	//12% fuzz in case highs and lows aren't clipped
	if (addFuzz) {
		*high = (int)(*high * .88);
		*low  = (int)(*low  * .88);
	}
}

// Get or auto-detect ask clock rate
int GetAskClock(const char str[], bool printAns, bool verbose)
{
	int clock;
	sscanf(str, "%i", &clock);
	if (!strcmp(str, ""))
		clock = 0;

	if (clock != 0) 
		return clock;
	// Auto-detect clock
	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	size_t size = getFromGraphBuf(grph);
	if (size == 0) {
		if (verbose)
			PrintAndLog("Failed to copy from graphbuffer");
		return -1;
	}
	bool st = DetectST(grph, &size, &clock);
	int start = 0;
	if (st == false) {
		start = DetectASKClock(grph, size, &clock, 20);
	}
	// Only print this message if we're not looping something
	if (printAns || g_debugMode) {
		PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
	}
	return clock;
}

uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
{
	uint8_t carrier=0;
	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	size_t size = getFromGraphBuf(grph);
	if ( size == 0 ) {
		if (verbose) 
			PrintAndLog("Failed to copy from graphbuffer");
		return 0;
	}
	uint16_t fc = countFC(grph,size,0);
	carrier = fc & 0xFF;
	if (carrier != 2 && carrier != 4 && carrier != 8) return 0;
	if ((fc>>8) == 10 && carrier == 8) return 0;
	// Only print this message if we're not looping something
	if (printAns) {
		PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
	}
	return carrier;
}

int GetPskClock(const char str[], bool printAns, bool verbose)
{
	int clock;
	sscanf(str, "%i", &clock);
	if (!strcmp(str, "")) 
		clock = 0;

	if (clock!=0) 
		return clock;
	// Auto-detect clock
	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	size_t size = getFromGraphBuf(grph);
	if ( size == 0 ) {
		if (verbose) 
			PrintAndLog("Failed to copy from graphbuffer");
		return -1;
	}
	size_t firstPhaseShiftLoc = 0;
	uint8_t curPhase = 0, fc = 0;
	clock = DetectPSKClock(grph, size, 0, &firstPhaseShiftLoc, &curPhase, &fc);
	// Only print this message if we're not looping something
	if (printAns){
		PrintAndLog("Auto-detected clock rate: %d", clock);
	}
	return clock;
}

uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
{
	int clock;
	sscanf(str, "%i", &clock);
	if (!strcmp(str, ""))
		clock = 0;

	if (clock!=0) 
		return clock;
	// Auto-detect clock
	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	size_t size = getFromGraphBuf(grph);
	if ( size == 0 ) {
		if (verbose) 
			PrintAndLog("Failed to copy from graphbuffer");
		return -1;
	}
	size_t clkStartIdx = 0;
	clock = DetectNRZClock(grph, size, 0, &clkStartIdx);
	// Only print this message if we're not looping something
	if (printAns){
		PrintAndLog("Auto-detected clock rate: %d", clock);
	}
	return clock;
}
//by marshmellow
//attempt to detect the field clock and bit clock for FSK
uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
{
	int clock;
	sscanf(str, "%i", &clock);
	if (!strcmp(str, ""))
		clock = 0;
	if (clock != 0) return (uint8_t)clock;


	uint8_t fc1=0, fc2=0, rf1=0;
	uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
	if (ans == 0) return 0;
	if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
		if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
		return rf1;
	}
	if (verbose){
		PrintAndLog("DEBUG: unknown fsk field clock detected");
		PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
	}
	return 0;
}
uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose)
{
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	size_t size = getFromGraphBuf(BitStream);
	if (size==0) return 0;
	uint16_t ans = countFC(BitStream, size, 1); 
	if (ans==0) {
		if (verbose || g_debugMode) PrintAndLog("DEBUG: No data found");
		return 0;
	}
	*fc1 = (ans >> 8) & 0xFF;
	*fc2 = ans & 0xFF;

	*rf1 = detectFSKClk(BitStream, size, *fc1, *fc2);
	if (*rf1==0) {
		if (verbose || g_debugMode) PrintAndLog("DEBUG: Clock detect error");
		return 0;
	}
	return 1;
}
bool graphJustNoise(int *BitStream, int size)
{
	static const uint8_t THRESHOLD = 15; //might not be high enough for noisy environments
	//test samples are not just noise
	bool justNoise1 = 1;
	for(int idx=0; idx < size && justNoise1 ;idx++){
		justNoise1 = BitStream[idx] < THRESHOLD;
	}
	return justNoise1;
}
Commit	Line	Data
a553f267	1	//-----------------------------------------------------------------------------
	2	// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
	3	//
	4	// This code is licensed to you under the terms of the GNU GPL, version 2 or,
	5	// at your option, any later version. See the LICENSE.txt file for the text of
	6	// the license.
	7	//-----------------------------------------------------------------------------
	8	// Graph utilities
	9	//-----------------------------------------------------------------------------
	10
7fe9b0b7	11	#include <stdio.h>
a1557c4c	12	#include <stdbool.h>
7fe9b0b7	13	#include <string.h>
	14	#include "ui.h"
	15	#include "graph.h"
d5a72d2f	16	#include "lfdemod.h"
2d99d991	17	#include "cmddata.h" //for g_debugmode
7fe9b0b7	18
	19	int GraphBuffer[MAX_GRAPH_TRACE_LEN];
	20	int GraphTraceLen;
abd6112f	21	/* write a manchester bit to the graph */
7fe9b0b7	22	void AppendGraph(int redraw, int clock, int bit)
	23	{
	24	int i;
abd6112f	25	//set first half the clock bit (all 1's or 0's for a 0 or 1 bit)
7fe9b0b7	26	for (i = 0; i < (int)(clock / 2); ++i)
78f5b1a7	27	GraphBuffer[GraphTraceLen++] = bit ;
abd6112f	28	//set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
7fe9b0b7	29	for (i = (int)(clock / 2); i < clock; ++i)
78f5b1a7	30	GraphBuffer[GraphTraceLen++] = bit ^ 1;
7fe9b0b7	31
	32	if (redraw)
	33	RepaintGraphWindow();
	34	}
	35
c12512e9	36	// clear out our graph window
7fe9b0b7	37	int ClearGraph(int redraw)
	38	{
	39	int gtl = GraphTraceLen;
52ab55ab	40	memset(GraphBuffer, 0x00, GraphTraceLen);
52ab55ab	41
7fe9b0b7	42	GraphTraceLen = 0;
	43
	44	if (redraw)
	45	RepaintGraphWindow();
	46
	47	return gtl;
	48	}
23f0a7d8	49	// option '1' to save GraphBuffer any other to restore
	50	void save_restoreGB(uint8_t saveOpt)
	51	{
	52	static int SavedGB[MAX_GRAPH_TRACE_LEN];
	53	static int SavedGBlen;
	54	static bool GB_Saved = false;
	55
	56	if (saveOpt==1) { //save
2767fc02	57	memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
23f0a7d8	58	SavedGBlen = GraphTraceLen;
23f0a7d8	59	GB_Saved=true;
49bbc60a	60	} else if (GB_Saved){ //restore
2767fc02	61	memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
23f0a7d8	62	GraphTraceLen = SavedGBlen;
49bbc60a	63	RepaintGraphWindow();
23f0a7d8	64	}
	65	return;
	66	}
7fe9b0b7	67
c12512e9	68	// DETECT CLOCK NOW IN LFDEMOD.C
7fe9b0b7	69
ba1a299c	70	void setGraphBuf(uint8_t *buff, size_t size)
d5a72d2f	71	{
a1557c4c	72	if ( buff == NULL ) return;
	73
	74	uint16_t i = 0;
	75	if ( size > MAX_GRAPH_TRACE_LEN )
	76	size = MAX_GRAPH_TRACE_LEN;
b4fb11ba	77	ClearGraph(0);
b4fb11ba	78	for (; i < size; ++i){
ba1a299c	79	GraphBuffer[i]=buff[i]-128;
b4fb11ba	80	}
	81	GraphTraceLen=size;
	82	RepaintGraphWindow();
	83	return;
d5a72d2f	84	}
ba1a299c	85	size_t getFromGraphBuf(uint8_t *buff)
d5a72d2f	86	{
e770c648	87	if (buff == NULL ) return 0;
b4fb11ba	88	uint32_t i;
	89	for (i=0;i<GraphTraceLen;++i){
	90	if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
	91	if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
	92	buff[i]=(uint8_t)(GraphBuffer[i]+128);
	93	}
	94	return i;
d5a72d2f	95	}
ec75f5c1	96
a1557c4c	97	// A simple test to see if there is any data inside Graphbuffer.
a1557c4c	98	bool HasGraphData(){
7fe9b0b7	99
a1557c4c	100	if ( GraphTraceLen <= 0) {
	101	PrintAndLog("No data available, try reading something first");
	102	return false;
	103	}
	104	return true;
	105	}
	106
	107	// Detect high and lows in Grapbuffer.
	108	// Only loops the first 256 values.
	109	void DetectHighLowInGraph(int high, int low, bool addFuzz) {
	110
	111	uint8_t loopMax = 255;
	112	if ( loopMax > GraphTraceLen)
	113	loopMax = GraphTraceLen;
	114
	115	for (uint8_t i = 0; i < loopMax; ++i) {
	116	if (GraphBuffer[i] > *high)
	117	*high = GraphBuffer[i];
	118	else if (GraphBuffer[i] < *low)
	119	*low = GraphBuffer[i];
	120	}
	121
	122	//12% fuzz in case highs and lows aren't clipped
	123	if (addFuzz) {
	124	high = (int)(high * .88);
	125	low = (int)(low * .88);
	126	}
7fe9b0b7	127	}
ba1a299c	128
f3bf15e4	129	// Get or auto-detect ask clock rate
f3bf15e4	130	int GetAskClock(const char str[], bool printAns, bool verbose)
e770c648	131	{
	132	int clock;
	133	sscanf(str, "%i", &clock);
	134	if (!strcmp(str, ""))
	135	clock = 0;
	136
f3bf15e4	137	if (clock != 0)
f3bf15e4	138	return clock;
e770c648	139	// Auto-detect clock
f3bf15e4	140	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	141	size_t size = getFromGraphBuf(grph);
	142	if (size == 0) {
	143	if (verbose)
e770c648	144	PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4	145	return -1;
f3bf15e4	146	}
b66ff081	147	bool st = DetectST(grph, &size, &clock);
	148	int start = 0;
	149	if (st == false) {
	150	start = DetectASKClock(grph, size, &clock, 20);
	151	}
f3bf15e4	152	// Only print this message if we're not looping something
bf85d22f	153	if (printAns \|\| g_debugMode) {
fef74fdc	154	PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
e770c648	155	}
	156	return clock;
	157	}
	158
872e3d4d	159	uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
	160	{
	161	uint8_t carrier=0;
	162	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	163	size_t size = getFromGraphBuf(grph);
	164	if ( size == 0 ) {
	165	if (verbose)
	166	PrintAndLog("Failed to copy from graphbuffer");
	167	return 0;
	168	}
b97311b1	169	uint16_t fc = countFC(grph,size,0);
	170	carrier = fc & 0xFF;
	171	if (carrier != 2 && carrier != 4 && carrier != 8) return 0;
	172	if ((fc>>8) == 10 && carrier == 8) return 0;
872e3d4d	173	// Only print this message if we're not looping something
b97311b1	174	if (printAns) {
872e3d4d	175	PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
	176	}
	177	return carrier;
	178	}
	179
f3bf15e4	180	int GetPskClock(const char str[], bool printAns, bool verbose)
	181	{
	182	int clock;
	183	sscanf(str, "%i", &clock);
	184	if (!strcmp(str, ""))
	185	clock = 0;
	186
	187	if (clock!=0)
	188	return clock;
	189	// Auto-detect clock
	190	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	191	size_t size = getFromGraphBuf(grph);
	192	if ( size == 0 ) {
	193	if (verbose)
	194	PrintAndLog("Failed to copy from graphbuffer");
	195	return -1;
	196	}
b97311b1	197	size_t firstPhaseShiftLoc = 0;
	198	uint8_t curPhase = 0, fc = 0;
	199	clock = DetectPSKClock(grph, size, 0, &firstPhaseShiftLoc, &curPhase, &fc);
f3bf15e4	200	// Only print this message if we're not looping something
	201	if (printAns){
	202	PrintAndLog("Auto-detected clock rate: %d", clock);
	203	}
	204	return clock;
	205	}
	206
	207	uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
4118b74d	208	{
ba1a299c	209	int clock;
ba1a299c	210	sscanf(str, "%i", &clock);
	211	if (!strcmp(str, ""))
	212	clock = 0;
	213
f3bf15e4	214	if (clock!=0)
f3bf15e4	215	return clock;
ba1a299c	216	// Auto-detect clock
f3bf15e4	217	uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
	218	size_t size = getFromGraphBuf(grph);
	219	if ( size == 0 ) {
	220	if (verbose)
e629181f	221	PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4	222	return -1;
f3bf15e4	223	}
6f36848f	224	size_t clkStartIdx = 0;
6f36848f	225	clock = DetectNRZClock(grph, size, 0, &clkStartIdx);
f3bf15e4	226	// Only print this message if we're not looping something
	227	if (printAns){
	228	PrintAndLog("Auto-detected clock rate: %d", clock);
ba1a299c	229	}
ba1a299c	230	return clock;
4118b74d	231	}
f3bf15e4	232	//by marshmellow
	233	//attempt to detect the field clock and bit clock for FSK
	234	uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
	235	{
	236	int clock;
	237	sscanf(str, "%i", &clock);
	238	if (!strcmp(str, ""))
	239	clock = 0;
	240	if (clock != 0) return (uint8_t)clock;
	241
abd6112f	242
	243	uint8_t fc1=0, fc2=0, rf1=0;
	244	uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
	245	if (ans == 0) return 0;
	246	if ((fc1==10 && fc2==8) \|\| (fc1==8 && fc2==5)){
	247	if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
	248	return rf1;
	249	}
	250	if (verbose){
	251	PrintAndLog("DEBUG: unknown fsk field clock detected");
	252	PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
	253	}
	254	return 0;
	255	}
	256	uint8_t fskClocks(uint8_t fc1, uint8_t fc2, uint8_t *rf1, bool verbose)
	257	{
f3bf15e4	258	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	259	size_t size = getFromGraphBuf(BitStream);
	260	if (size==0) return 0;
2eec55c8	261	uint16_t ans = countFC(BitStream, size, 1);
f3bf15e4	262	if (ans==0) {
2d99d991	263	if (verbose \|\| g_debugMode) PrintAndLog("DEBUG: No data found");
f3bf15e4	264	return 0;
f3bf15e4	265	}
abd6112f	266	*fc1 = (ans >> 8) & 0xFF;
abd6112f	267	*fc2 = ans & 0xFF;
f3bf15e4	268
abd6112f	269	rf1 = detectFSKClk(BitStream, size, fc1, *fc2);
abd6112f	270	if (*rf1==0) {
2d99d991	271	if (verbose \|\| g_debugMode) PrintAndLog("DEBUG: Clock detect error");
f3bf15e4	272	return 0;
f3bf15e4	273	}
abd6112f	274	return 1;
f3bf15e4	275	}
38cb7c71	276	bool graphJustNoise(int *BitStream, int size)
38cb7c71	277	{
e04475c4	278	static const uint8_t THRESHOLD = 15; //might not be high enough for noisy environments
38cb7c71	279	//test samples are not just noise
	280	bool justNoise1 = 1;
	281	for(int idx=0; idx < size && justNoise1 ;idx++){
	282	justNoise1 = BitStream[idx] < THRESHOLD;
	283	}
	284	return justNoise1;
	285	}