hoo2
/
virtualModem
1
0
Fork 0
Code Issues 0 Pull Requests 0 Releases 2 Wiki Activity
Browse Source

FIX: ARQ naming

tags/v1.0-b1
Christos Choutouridis 4 years ago
parent
0d0694dec0
commit
0b8c2c574c
3 changed files with 163 additions and 147 deletions
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. +0
    -138
      src/net/hoo2/auth/vmodem/AQR.java
  2. +154
    -0
      src/net/hoo2/auth/vmodem/ARQ.java
  3. +9
    -9
      src/net/hoo2/auth/vmodem/VirtualModem.java

+ 0
- 138
src/net/hoo2/auth/vmodem/AQR.java View File

@@ -1,138 +0,0 @@
/**
* @file AQR.java
*
* @author Christos Choutouridis AEM:8997
* @email cchoutou@ece.auth.gr
*/
package net.hoo2.auth.vmodem;
/** @name imports */
/** @{ */
import java.util.*;
/** @} */
/**
* @class AQR
*
* Class to used for the ACK-NACK sequence
*/
class AQR {
static final int AQ_DURATION_DEFAULT = 240; /**< Default duration for the sequence */
static final int AQR_BUFFER_SIZE = 256; /**< AQR buffer size */
static final String AQR_BEGIN = "PSTART"; /**< Begin pattern of the response */
static final String AQR_END = "PSTOP"; /**< End pattern of the response */
static final int AQR_SEQUENCE_BEGIN = 31; /**< The response sequence string position */
static final int AQR_SEQUENCE_END = 47; /**< The end of response sequence string position */
static final int AQR_CRC_BEGIN = 49; /**< The response crc string position */
static final int AQR_CRC_END = 52; /**< The end of response crc string position */
private Com com_; /**< Reference to communication module */
private Log log_; /**< Reference to logging module */
private Transaction transaction_; /**< A transaction object to used as a buffer for all requests */
private int duration_; /**< The desired duration for the session */
private byte[] ack_; /**< The desired ACK code for the session */
private byte[] nack_; /**< The desired NACK code for the session */
/**
* Basic constructor
* @param com The Com module to use
* @param log The Log module to use
* @param ack The desired ACK code
* @param nack The desired NACK code
* @param duration The desired duration for the session
*/
AQR (Com com, Log log, byte[] ack, byte[] nack, int duration) {
com_ = com;
log_ = log;
duration_ = duration;
transaction_= new Transaction(null, new byte[AQR_BUFFER_SIZE]);
ack_ = ack;
nack_ = nack;
}
/**
* Functionality to drain the response buffer for the welcome message
* from the server
* @param ack The ack code that we will use (for printing, not sending)
* @param nack The nack code that we will use (for printing, not sending)
*/
void caption (byte[] ack, byte[] nack) {
String line;
line = "Running AQR with: " + new String(ack) + "/" + new String(nack);
log_.write(line, true);
transaction_ = com_.request (transaction_, null, null, null, false);
line = new String(transaction_.getResponse());
log_.out(line);
}
/**
* Main transaction loop. It send requests to server, get the response
* and log the procedure while doing it.
*/
void run () {
long start;
long now;
long mark =0, delay =0;
String line;
int bads = 0;
boolean good = true;
boolean prev = true;
start = System.currentTimeMillis();
do {
// Check if the previous transaction was error-free
if (good)
transaction_ = com_.request(transaction_, ack_, AQR_BEGIN.getBytes(), AQR_END.getBytes(), false);
else
transaction_ = com_.request(transaction_, nack_, AQR_BEGIN.getBytes(), AQR_END.getBytes(), false);
good = (_crc_check(transaction_.response)) ? true : false; // crc check the response
bads = (good) ? 0 : bads+1; // count the error strike
// delay calculation
if (prev && !good) mark = transaction_.departure;
if (!prev && good) delay = transaction_.arrival - mark;
else delay = 0;
prev = good;
line = new String(transaction_.code) + ": "
+ new String(transaction_.getResponse())
+ " Er: " + bads
+ " Tr= " + (transaction_.arrival - transaction_.departure) + " [msec]";
if (delay != 0) line += " Tt= " + delay + " [msec]";
log_.write(line);
now = System.currentTimeMillis();
} while (now - start < duration_*1000);
}
/** @name private helper API */
/**@{ */
/**
* A CRC check functionality
* @param data The data to check for validity
* @return The check result
*/
private boolean _crc_check (byte[] data) {
byte[] seq = Arrays.copyOfRange(data, AQR_SEQUENCE_BEGIN, AQR_SEQUENCE_END);
int crc = Integer.valueOf(
new String(Arrays.copyOfRange(data, AQR_CRC_BEGIN, AQR_CRC_END)));
return (crc == _crc(seq)) ? true : false;
}
/**
* A CRC calculation function. This primitive CRC calculator
* does not use any known CRC polynomial. It just uses XOR
* @param data Reference to buffer
* @return The CRC result
*/
private int _crc (byte[] data) {
int calc =0;
for (int i=0 ; i<data.length ; ++i)
calc ^= data[i];
return calc;
}
/**@} */
}

+ 154
- 0
src/net/hoo2/auth/vmodem/ARQ.java View File

@@ -0,0 +1,154 @@
/**
* @file ARQ.java
*
* @author Christos Choutouridis AEM:8997
* @email cchoutou@ece.auth.gr
*/
package net.hoo2.auth.vmodem;
/** @name imports */
/** @{ */
import java.util.*;
/** @} */
/**
* @class ARQ
*
* Class to used for the ACK-NACK sequence
*/
class ARQ {
static final int ARQ_DURATION_DEFAULT = 240; /** Default duration for the sequence */
static final int ARQ_BUFFER_SIZE = 256; /** ARQ buffer size */
static final String ARQ_BEGIN = "PSTART"; /** Begin pattern of the response */
static final String ARQ_END = "PSTOP"; /** End pattern of the response */
static final int ARQ_SEQUENCE_BEGIN = 31; /** The response sequence string position */
static final int ARQ_SEQUENCE_END = 47; /** The end of response sequence string position */
static final int ARQ_CRC_BEGIN = 49; /** The response crc string position */
static final int ARQ_CRC_END = 52; /** The end of response crc string position */
private Com com_; /** Reference to communication module */
private Log log_; /** Reference to logging module */
private Transaction transaction_; /** A transaction object to used as a buffer for all requests */
private int duration_; /** The desired duration for the session */
private byte[] ack_; /** The desired ACK code for the session */
private byte[] nack_; /** The desired NACK code for the session */
/**
* Basic constructor
* @param com The Com module to use
* @param log The Log module to use
* @param ack The desired ACK code
* @param nack The desired NACK code
* @param duration The desired duration for the session
*/
ARQ (Com com, Log log, byte[] ack, byte[] nack, int duration) {
com_ = com;
log_ = log;
duration_ = duration;
transaction_= new Transaction(null, new byte[ARQ_BUFFER_SIZE]);
ack_ = ack;
nack_ = nack;
}
/**
* Functionality to drain the response buffer for the welcome message
* from the server
* @param ack The ack code that we will use (for printing, not sending)
* @param nack The nack code that we will use (for printing, not sending)
*/
void caption (byte[] ack, byte[] nack) {
String line;
line = "Running ARQ with: " + new String(ack) + "/" + new String(nack);
log_.write(line, true);
transaction_ = com_.request (transaction_, null, null, null, false);
line = new String(transaction_.getResponse());
log_.out(line);
}
/**
* Main transaction loop. It send requests to server, get the response
* and log the procedure while doing it.
*/
void run () {
long start;
long now;
long mark =0, tr =0, ts =0, tt =0;
String line;
int errors = 0;
boolean good = true;
start = System.currentTimeMillis();
do {
// Check if the previous transaction was error-free
if (good)
transaction_ = com_.request(transaction_, ack_, ARQ_BEGIN.getBytes(), ARQ_END.getBytes(), false);
else
transaction_ = com_.request(transaction_, nack_, ARQ_BEGIN.getBytes(), ARQ_END.getBytes(), false);
good = (_crc_check(transaction_.response)) ? true : false; // crc check the response
// time calculations
tr = transaction_.arrival - transaction_.departure;
tt = 0;
if ((errors == 0) && good) {
tt = ts = tr;
}
if ((errors == 0) && !good) {
mark = transaction_.departure;
ts = tr;
}
if ((errors != 0) && good) {
tt = transaction_.arrival - mark;
ts += tr;
}
if ((errors !=0) && !good) {
ts += tr;
}
errors = (good) ? 0 : errors+1; // update the error strike
line = new String(transaction_.code) + ": "
+ new String(transaction_.getResponse())
+ " Er: " + errors
+ " Tr= " + tr + " [msec]";
if (errors !=0)
line += " Ts= 0 [msec] Tt= 0 [msec]";
else
line += " Ts= " + ts + " [msec]" + " Tt= " + tt + " [msec]";
log_.write(line);
now = System.currentTimeMillis();
} while (now - start < duration_*1000);
}
/** @name private helper API */
/**@{ */
/**
* A CRC check functionality
* @param data The data to check for validity
* @return The check result
*/
private boolean _crc_check (byte[] data) {
byte[] seq = Arrays.copyOfRange(data, ARQ_SEQUENCE_BEGIN, ARQ_SEQUENCE_END);
int crc = Integer.valueOf(
new String(Arrays.copyOfRange(data, ARQ_CRC_BEGIN, ARQ_CRC_END))
);
return (crc == _crc(seq)) ? true : false;
}
/**
* A CRC calculation function. This primitive CRC calculator
* does not use any known CRC polynomial. It just uses XOR
* @param data Reference to buffer
* @return The CRC result
*/
private int _crc (byte[] data) {
int calc =0;
for (int i=0 ; i<data.length ; ++i)
calc ^= data[i];
return calc;
}
/**@} */
}

+ 9
- 9
src/net/hoo2/auth/vmodem/VirtualModem.java View File

@@ -73,10 +73,10 @@ public class VirtualModem {
+ " <1>: The echo requested code from virtual lab\n"
+ " <2>: The time duration of the session [sec]")
.build();
Option aqr = Option.builder("a")
.longOpt("aqr")
Option arq = Option.builder("a")
.longOpt("arq")
.numberOfArgs(3)
.desc ("Request aqr sequence where <arg> = <1> <2> <3>\n"
.desc ("Request arq sequence where <arg> = <1> <2> <3>\n"
+ " <1>: The ACK requested code for virtual lab\n"
+ " <2>: The NACK requested code from virtual lab\n"
+ " <2>: The time duration for the session [sec]")
@@ -105,7 +105,7 @@ public class VirtualModem {
options.addOption(speed);
options.addOption(log);
options.addOption(echo);
options.addOption(aqr);
options.addOption(arq);
options.addOption(img);
options.addOption(gps);
}
@@ -173,11 +173,11 @@ public class VirtualModem {
}
}
else if (line.hasOption("aqr")) {
byte[] ack = line.getOptionValues("aqr")[0].getBytes();
byte[] nack = line.getOptionValues("aqr")[1].getBytes();
AQR a = new AQR(com, log, ack, nack,
Integer.valueOf(line.getOptionValues("aqr")[2]));
else if (line.hasOption("arq")) {
byte[] ack = line.getOptionValues("arq")[0].getBytes();
byte[] nack = line.getOptionValues("arq")[1].getBytes();
ARQ a = new ARQ(com, log, ack, nack,
Integer.valueOf(line.getOptionValues("arq")[2]));
if (com.open()) {
a.caption(ack, nack);
a.run();


Write Preview
Loading…
Cancel
Save