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ied_send.cpp
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ied_send.cpp
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#include <algorithm>
#include <array>
#include <cctype>
#include <chrono>
#include <cmath>
#include <ctime>
#include <cstdint>
#include <cstring>
#include <iomanip>
#include <iostream>
#include <map>
#include <string>
#include <vector>
#include <climits>
#include <iostream>
#include <fstream>
// For parsing SED file (in XML format)
#include "parse_sed.hpp"
// For netdevice - low-level access to Linux network devices
#include <sys/ioctl.h>
#include <net/if.h>
// For Networking/Socket and multicast
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/types.h>
#include "udpSock.hpp"
#include "zz_diagnose.hpp"
// For IED operations/debugging
#include "ied_utils.hpp"
#define IEDUDPPORT 102
#define MAXBUFLEN 1024
using namespace std;
// Set timestamp in an 8-byte array
void set_timestamp(std::array<unsigned char, 8> &timeArrOut)
{
auto nanosec_since_epoch = std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::system_clock::now().time_since_epoch()).count();
auto sec_since_epoch = std::chrono::duration_cast<std::chrono::seconds>(std::chrono::system_clock::now().time_since_epoch()).count();
unsigned int subsec_component = nanosec_since_epoch - (sec_since_epoch * 1'000'000'000);
double frac_sec{static_cast<double>(subsec_component)};
// Convert from [nanosecond] to [second]
for (int i = 0; i < 9; i++)
{
frac_sec = frac_sec / 10;
}
// Convert to 3-byte (24-bit) fraction of second value (ref: ISO 9506-2)
for (int i = 0; i < 24; i++)
{
frac_sec = frac_sec * 2;
}
frac_sec = round(frac_sec);
subsec_component = static_cast<unsigned int>(frac_sec);
// Set integer seconds in array's high order octets (0 to 3)
for (std::size_t i{ 0 }; i < (timeArrOut.size() / 2); i++)
{
timeArrOut[i] = static_cast<int>((sec_since_epoch >> (24 - 8 * i)) & 0xff);
}
// Set fractional second in array's octets 4 to 6
for (std::size_t i{ timeArrOut.size() / 2 }; i < (timeArrOut.size() - 1); i++)
{
timeArrOut[i] = static_cast<int>(subsec_component >> (16 - 8 * (i - timeArrOut.size() / 2)) & 0xff);
}
/*
// DEBUGGING: For digging into the workings of timestamp
std::cout << std::dec;
std::cout << "seconds since epoch: \t " << sec_since_epoch << '\n';
std::cout << "nanoseconds since epoch: " << nanosec_since_epoch << "\n\n";
std::cout << "round(frac_sec * 2^24): " << std::fixed << frac_sec << '\n';
std::cout << "frac_sec (integer): " << std::hex << subsec_component << "\n\n";
for (std::size_t i{ 0 }; i < timeArrOut.size(); i++)
{
std::cout << "timeArrOut[" << i << "]: " << std::setfill('0') << std::setw(2) << static_cast<int>(timeArrOut[i]) << '\n';
}
*/
}
// Set GOOSE allData value in output parameter
void set_gse_hardcoded_data(std::vector<unsigned char> &allDataOut, GooseSvData &goose_data, bool loop_data)
{
//static int s_value{0};
/* GOOSE data set encoded based on the MMS adapted ASN.1/BER rule */
// Tag = 0x83 -> Data type: Boolean
allDataOut.push_back(0x83);
// Length = 0x01
allDataOut.push_back(0x01);
// Value = 0x00 -> Circuit breaker is Open
// = 0x01 -> Circuit breaker is Close
int i=0, c=0;
string line;
unsigned int goose_counter = goose_data.goose_counter;
fstream datafile;
datafile.open("GOOSEdata.txt");
if (!datafile.is_open())
{
cout << "Failure to open." << endl;
}
while(goose_counter > 0)
{
getline(datafile,line);
goose_counter--;
}
c = line.length();
// ensure data provided is not empty
assert(c!=0);
for (int i = 1; i<line.length();i++)
{
if (line.at(i) == ' ')
{
c--;
}
}
line.erase(std::remove_if(line.begin(), line.end(), ::isspace), line.end());
datafile.close();
cout << "Number of characters: "<< c << endl;
unsigned int s_value;
if (loop_data)
{
s_value = goose_data.s_value % c;
}
else
{
s_value = goose_data.s_value;
}
// prevent overflow
//assert(s_value < c);
cout<<"GOOSEdata file values are: ";
for (int i = 0; i < line.length(); i++)
cout << line[i] << ", ";
cout << endl;
if (line[s_value] == '0')
{
//cout <<"pushed 0" << endl;
allDataOut.push_back(0x00);
}
else
{
//cout <<"pushed 1" << endl;
allDataOut.push_back(0x01);
}
// Circuit breaker closed during cycles 10-14
//if (s_value >= 10 && s_value < 15)
//{
// allDataOut.push_back(0x00);
//}
//else
//{
// allDataOut.push_back(0x01);
//}
/* [For Demo Purpose]
* Add 2-sec delay just before sending the 21st packet (s_value = 20)
* Facilitate demonstration of attacker using this attack window
*/
//if (s_value == 25)
//{
//sleep(2);
//}
// Ensure allData field has only the 3 bytes hardcoded from this function
assert (allDataOut.size() == 3);
}
void set_sv_hardcoded_data(std::vector<unsigned char> &seqOfData_Value, GooseSvData &sv_data, bool loop_data)
{
int i=0, v=0, counter=0;
string line, value;
unsigned int sv_counter = sv_data.sv_counter;
fstream datafile;
datafile.open("SVdata.txt");
if (!datafile.is_open())
{
cout << "Failure to open." << endl;
}
while(sv_counter > 0)
{
getline(datafile,line);
sv_counter--;
}
// using whitespace to count the number of values
for (int i = 1; i<line.length();i++)
{
if (line.at(i) == ' ')
{
v++;
}
}
v += 1;
datafile.close();
// ensure there are 4 voltage + 4 degree, 4 current + 4 degree values
//assert(v%16 == 0);
std::istringstream iss(line);
IEEEfloat float_value;
unsigned int s_value;
if (loop_data)
{
s_value = sv_data.s_value % (v/16);
}
else
{
s_value = sv_data.s_value;
}
s_value *= 16;
while(s_value > 0)
{
iss >> value;
s_value--;
}
cout << "SVdata file values are: ";
while(iss >> value && counter != 16)
{
cout << value << ", ";
float_value.f = stof(value);
convertIEEE(float_value, seqOfData_Value);
counter++;
}
cout << endl;
//cout << "SVdata file values are: ";
//for (i = 0; i < seqOfData_Value.size(); i++)
// cout << seqOfData_Value[i] << ", ";
// cout << endl;
// Ensure seqOfData_Value field has only the 64 bytes hardcoded from this function
assert (seqOfData_Value.size() == 64);
}
/* Function to form the GOOSE PDU */
// "Returns" out parameter: pduOut (newly initialized by caller before passed in)
void form_goose_pdu(GooseSvData &goose_data, std::vector<unsigned char> &pduOut)
{
/* Initialize variables for GOOSE PDU data */
unsigned char goosePDU_Tag{0x61};
//unsigned char goosePDU_Tag2{0x81};
unsigned char goosePDU_Len{}; // Includes GOOSE PDU Tag & Len and every component's length
// *** GOOSE PDU -> gocbRef ***
unsigned char gocbRef_Tag{0x80};
unsigned char gocbRef_Len{static_cast<unsigned char>(goose_data.cbName.length())}; // Maximum size of 65 bytes by specification
std::vector<unsigned char> gocbRef_Value{goose_data.cbName.begin(), goose_data.cbName.end()};
// *** GOOSE PDU -> timeAllowedToLive (in ms) ***
unsigned char timeAllowedToLive_Tag{0x81};
unsigned char timeAllowedToLive_Len{};
unsigned int timeAllowedToLive_Value{}; // Depends on sqNum
// *** GOOSE PDU -> datSet ***
unsigned char datSet_Tag{0x82};
unsigned char datSet_Len{static_cast<unsigned char>(goose_data.datSetName.length())}; // Maximum size of 65 bytes by specification
std::vector<unsigned char> datSet_Value{goose_data.datSetName.begin(), goose_data.datSetName.end()};
// *** GOOSE PDU -> goID ***
unsigned char goID_Tag{0x83};
unsigned char goID_Len{static_cast<unsigned char>(goose_data.cbName.length())}; // Maximum size of 65 bytes by specification
std::vector<unsigned char> goID_Value{goose_data.cbName.begin(), goose_data.cbName.end()};
// *** GOOSE PDU -> t ***
unsigned char time_Tag{0x84};
const unsigned char time_Len{0x08};
/*
* Bit 7 = 0: Leap Second NOT Known
* Bit 6 = 0: Not ClockFailure
* Bit 5 = 0: Clock Synchronized
* Bits 4-0 = 01010: 10-bits of accuracy [HARDCODING]
*/
std::array<unsigned char, time_Len> time_Value{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0a};
// *** GOOSE PDU -> stNum ***
unsigned char stNum_Tag{0x85};
unsigned char stNum_Len{};
unsigned int stNum_Value{};
// *** GOOSE PDU -> sqNum ***
unsigned char sqNum_Tag{0x86};
unsigned char sqNum_Len{};
unsigned int sqNum_Value{};
// *** GOOSE PDU -> test ***
unsigned char test_Tag{0x87};
const unsigned char test_Len{1};
unsigned char test_Value{0}; // 0 = Boolean false
// *** GOOSE PDU -> confRev ***
unsigned char confRev_Tag{0x88};
unsigned char confRev_Len{1}; // Len = 1 since value is fixed as 1
unsigned char confRev_Value{1}; // [Deviation] UINT32 type by specification
// - specifying the number of times configuration of data set has been changed
// *** GOOSE PDU -> ndsCom ***
unsigned char ndsCom_Tag{0x89};
const unsigned char ndsCom_Len{1};
unsigned char ndsCom_Value{0}; // 0 = Boolean false (does not need commissioning)
// *** GOOSE PDU -> numDatSetEntries ***
unsigned char numDatSetEntries_Tag{0x8A};
unsigned char numDatSetEntries_Len{1};
unsigned char numDatSetEntries_Value{1}; // depends on how many data attributes to include (fix to 1 as of now)
// *** GOOSE PDU -> allData ***
unsigned char allData_Tag{0xAB};
unsigned char allData_Len{};
std::vector<unsigned char> allData_Value{};
// *** start forming GOOSE PDU from bottom of structure ***
// because some components at the top are dependent on others at the bottom
// (xii) get allData value from database
set_gse_hardcoded_data(allData_Value, goose_data, true); // To be replaced when implementing database access
allData_Len = allData_Value.size();
// (viii) to (xi) no changes from initialization
// (vi) stNum & (vii) Set sqNum
bool stateChanged{goose_data.prev_allData_Value != allData_Value};
if (stateChanged)
{
// Update current stNum_Value when data value changed
// and also update the historical record in preparation for next cycle
stNum_Value = ++goose_data.prev_stNum_Value;
// 0 is reserved for the 1st transmission of a StNum change
sqNum_Value = 0;
goose_data.prev_sqNum_Value = 0;
}
else
{
// No increment of stNum when data value not changed
stNum_Value = goose_data.prev_stNum_Value;
// Increment sqNum
if (goose_data.prev_sqNum_Value != UINT_MAX)
{
// Increment for each transmission of the same stNum
// and also update the historical record in preparation for next cycle
sqNum_Value = ++goose_data.prev_sqNum_Value;
}
else
{
// rolls over to value of 1
sqNum_Value = 1;
goose_data.prev_sqNum_Value = 1;
}
}
sqNum_Len = getUINT32Length(sqNum_Value);
stNum_Len = getUINT32Length(stNum_Value);
// (v) t (i.e. UTC time stamp)
set_timestamp(time_Value);
// (iii) datSet & (iv) goID no changes from initialization
// (ii) timeAllowedToLive (in milliseconds)
if (sqNum_Value <= 5)
{
timeAllowedToLive_Value = 20; // 0x14
timeAllowedToLive_Len = 0x01;
}
else if (sqNum_Value == 6)
{
timeAllowedToLive_Value = 32; // 0x20
timeAllowedToLive_Len = 0x01;
}
else if (sqNum_Value == 7)
{
timeAllowedToLive_Value = 64; // 0x40
timeAllowedToLive_Len = 0x01;
}
else if (sqNum_Value == 8)
{
timeAllowedToLive_Value = 128;
timeAllowedToLive_Len = 0x01; // 0x80
}
else if (sqNum_Value == 9)
{
timeAllowedToLive_Value = 256; // 0x0100
timeAllowedToLive_Len = 0x02;
}
else if (sqNum_Value == 10)
{
timeAllowedToLive_Value = 512; // 0x0200
timeAllowedToLive_Len = 0x02;
}
else if (sqNum_Value == 11)
{
timeAllowedToLive_Value = 1024; // 0x0400
timeAllowedToLive_Len = 0x02;
}
else if (sqNum_Value == 12)
{
timeAllowedToLive_Value = 2048; // 0x0800
timeAllowedToLive_Len = 0x02;
}
else if (sqNum_Value >= 13)
{
timeAllowedToLive_Value = 4000; // 0x0FA0
timeAllowedToLive_Len = 0x02;
}
// (i) gocbRef no changes from initialization
/* Fill up pduOut for "returning" */
pduOut.push_back(goosePDU_Tag); // index 0
//pduOut.push_back(goosePDU_Tag2); // index 1
pduOut.push_back(goosePDU_Len); // index 2: here, GOOSE PDU Length is not yet computed/assigned
pduOut.push_back(gocbRef_Tag);
pduOut.push_back(gocbRef_Len);
pduOut.insert(pduOut.end(), gocbRef_Value.begin(), gocbRef_Value.end());
pduOut.push_back(timeAllowedToLive_Tag);
pduOut.push_back(timeAllowedToLive_Len);
std::vector<unsigned char> timeAllowedToLive_ValVec{};
convertUINT32IntoBytes(timeAllowedToLive_Value, timeAllowedToLive_ValVec);
pduOut.insert(pduOut.end(), timeAllowedToLive_ValVec.begin(), timeAllowedToLive_ValVec.end());
pduOut.push_back(datSet_Tag);
pduOut.push_back(datSet_Len);
pduOut.insert(pduOut.end(), datSet_Value.begin(), datSet_Value.end());
pduOut.push_back(goID_Tag);
pduOut.push_back(goID_Len);
pduOut.insert(pduOut.end(), goID_Value.begin(), goID_Value.end());
pduOut.push_back(time_Tag);
pduOut.push_back(time_Len);
pduOut.insert(pduOut.end(), time_Value.begin(), time_Value.end());
pduOut.push_back(stNum_Tag);
pduOut.push_back(stNum_Len);
std::vector<unsigned char> stNum_ValVec{};
convertUINT32IntoBytes(stNum_Value, stNum_ValVec);
pduOut.insert(pduOut.end(), stNum_ValVec.begin(), stNum_ValVec.end());
pduOut.push_back(sqNum_Tag);
pduOut.push_back(sqNum_Len);
std::vector<unsigned char> sqNum_ValVec{};
convertUINT32IntoBytes(sqNum_Value, sqNum_ValVec);
pduOut.insert(pduOut.end(), sqNum_ValVec.begin(), sqNum_ValVec.end());
pduOut.push_back(test_Tag);
pduOut.push_back(test_Len);
pduOut.push_back(test_Value);
pduOut.push_back(confRev_Tag);
pduOut.push_back(confRev_Len);
pduOut.push_back(confRev_Value);
pduOut.push_back(ndsCom_Tag);
pduOut.push_back(ndsCom_Len);
pduOut.push_back(ndsCom_Value);
pduOut.push_back(numDatSetEntries_Tag);
pduOut.push_back(numDatSetEntries_Len);
pduOut.push_back(numDatSetEntries_Value);
pduOut.push_back(allData_Tag);
pduOut.push_back(allData_Len);
pduOut.insert(pduOut.end(), allData_Value.begin(), allData_Value.end());
pduOut[1] = pduOut.size();
// Update historical allData before exiting function
goose_data.prev_allData_Value = allData_Value;
}
/* Function to form the SV PDU */
// "Returns" out parameter: pduOut (newly initialized by caller before passed in)
void form_sv_pdu(GooseSvData &sv_data, std::vector<unsigned char> &pduOut)
{
/* Initialize variables for SV PDU data */
unsigned char svPDU_Tag{0x60};
//unsigned char svPDU_Tag2{0x80};
unsigned char svPDU_Len{}; // Includes SV PDU Tag & Len and every component's length
unsigned char noASDU_Tag{0x80};
unsigned char noASDU_Len{0x01};
unsigned char noASDU_Value{0x01}; // Fixed as 1 for IEC 61850-9-2 LE implementation
unsigned char seqOfASDU_Tag{0xA2};
unsigned char seqOfASDU_Len{};
// *** SV ASDU ***
unsigned char asdu_Tag{0x30};
unsigned char asdu_Len{};
// *** SV ASDU -> MsvID ***
unsigned char svID_Tag{0x80};
unsigned char svID_Len{static_cast<unsigned char>(sv_data.cbName.length())};
std::vector<unsigned char> svID_Value{sv_data.cbName.begin(), sv_data.cbName.end()};
// *** SV ASDU -> smpCnt ***
unsigned char smpCnt_Tag{0x82};
unsigned char smpCnt_Len{0x02};
unsigned int smpCnt_Value{};
// *** SV ASDU -> confRev ***
unsigned char confRev_Tag{0x83};
unsigned char confRev_Len{0x04};
unsigned int confRev_Value{};
// *** SV ASDU -> smpSynch ***
unsigned char smpSynch_Tag{0x85};
unsigned char smpSynch_Len{0x01};
unsigned char smpSynch_Value{};
// *** SV ASDU -> Sample ***
unsigned char seqOfData_Tag{0x87};
unsigned char seqOfData_Len{};
std::vector<unsigned char> seqOfData_Value{};
// *** SV PDU -> t ***
unsigned char time_Tag{0x89};
const unsigned char time_Len{0x08};
/*
* Bit 7 = 0: Leap Second NOT Known
* Bit 6 = 0: Not ClockFailure
* Bit 5 = 0: Clock Synchronized
* Bits 4-0 = 01010: 10-bits of accuracy [HARDCODING]
*/
std::array<unsigned char, time_Len> time_Value{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x0a};
// Set smpCnt Value (assume 50Hz)
if (sv_data.prev_smpCnt_Value != 3999)
{
smpCnt_Value = sv_data.prev_smpCnt_Value++;
}
else
{
smpCnt_Value = 0;
sv_data.prev_smpCnt_Value = 0;
}
// Set confRev Value
confRev_Value = 1;
// Set smpSynch Value (fixed as 2 in this implementation)
/* As per IEC 61850-9-2:
* 0 = SV are not synchronised by an external clock signal.
* 1 = SV are synchronised by a clock signal from an unspecified local area clock.
* 2 = SV are synchronised by a global area clock signal (time traceable).
* 5 to 254 = SV are synchronised by a clock signal from a local area clock identified by this value.
* 3 to 4, 255 = Reserved values – Do not use.
*/
smpSynch_Value = 0x02;
// Set seqOfData
// HARDCODED Sample Data in this implementation
/*seqOfData_Value = {0x10, 0x14, 0x12, 0x15, 0x12, 0x64, 0x11, 0x12, 0x18, 0x22, 0x14, 0x12, 0x17, 0x16, 0x30, 0x42,
0x10, 0x14, 0x12, 0x15, 0x12, 0x64, 0x11, 0x12, 0x18, 0x22, 0x14, 0x12, 0x17, 0x16, 0x30, 0x42,
0x10, 0x14, 0x12, 0x15, 0x12, 0x64, 0x11, 0x12, 0x18, 0x22, 0x14, 0x12, 0x17, 0x16, 0x80, 0xDA,
0x80, 0x60, 0x0C, 0x2D, 0x01, 0x03, 0x0D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
*/
set_sv_hardcoded_data(seqOfData_Value, sv_data, true);
seqOfData_Len = seqOfData_Value.size();
// Set timestamp
set_timestamp(time_Value);
/* At this point, the ASDU is complete.
* So, start filling up a temp vector with ASDU and get ASDU's length first.
* Then, encapsulate with other encoding to complete the entire PDU.
*/
std::vector<unsigned char> tmpVec{};
tmpVec.push_back(asdu_Tag); // index 0 of tmpVec
tmpVec.push_back(asdu_Len); // index 1 of tmpVec: not yet computed
tmpVec.push_back(svID_Tag); // index 2 of tmpVec
tmpVec.push_back(svID_Len);
tmpVec.insert(tmpVec.end(), svID_Value.begin(), svID_Value.end());
tmpVec.push_back(smpCnt_Tag);
tmpVec.push_back(smpCnt_Len);
std::vector<unsigned char> smpCnt_ValVec{};
convertUINT32IntoBytes(smpCnt_Value, smpCnt_ValVec);
assert ((smpCnt_ValVec.size() > 0) && (smpCnt_ValVec.size() <= 2));
if (smpCnt_ValVec.size() == 1)
tmpVec.push_back(0x00); // Pad with a higher order byte 0x00 to ensure condition (smpCnt_Len == 2)
tmpVec.insert(tmpVec.end(), smpCnt_ValVec.begin(), smpCnt_ValVec.end());
tmpVec.push_back(confRev_Tag);
tmpVec.push_back(confRev_Len);
tmpVec.push_back(static_cast<unsigned char>( (confRev_Value >> 24) & 0xFF ));
tmpVec.push_back(static_cast<unsigned char>( (confRev_Value >> 16) & 0xFF ));
tmpVec.push_back(static_cast<unsigned char>( (confRev_Value >> 8) & 0xFF ));
tmpVec.push_back(static_cast<unsigned char>( (confRev_Value ) & 0xFF ));
tmpVec.push_back(smpSynch_Tag);
tmpVec.push_back(smpSynch_Len);
tmpVec.push_back(smpSynch_Value);
tmpVec.push_back(seqOfData_Tag);
tmpVec.push_back(seqOfData_Len);
tmpVec.insert(tmpVec.end(), seqOfData_Value.begin(), seqOfData_Value.end());
tmpVec.push_back(time_Tag);
tmpVec.push_back(time_Len);
tmpVec.insert(tmpVec.end(), time_Value.begin(), time_Value.end());
// Set ASDU Length
tmpVec[1] = tmpVec.size();
/* At this point, the sequence of (one) ASDU is complete, i.e. tmpVec
* So, start filling up pduOut with required encoding for the SV PDU.
* Then, append the tmpVec at the end to complete the SV PDU.
*/
seqOfASDU_Len = tmpVec.size() + 2;
svPDU_Len = seqOfASDU_Len + 5;
pduOut.push_back(svPDU_Tag);
//pduOut.push_back(svPDU_Tag2);
pduOut.push_back(svPDU_Len);
pduOut.push_back(noASDU_Tag); // 0x80
pduOut.push_back(noASDU_Len); // 0x01
pduOut.push_back(noASDU_Value); // 0x01
pduOut.push_back(seqOfASDU_Tag);
pduOut.push_back(seqOfASDU_Len);
pduOut.insert(pduOut.end(), tmpVec.begin(), tmpVec.end());
// Update historical allData before exiting function
sv_data.prev_seqOfData_Value = seqOfData_Value;
}
int main(int argc, char *argv[])
{
if (argc != 4)
{
if (argv[0])
std::cout << "Usage: " << argv[0] << " <SED Filename> <Interface Name to be used on IED> <IED Name>" << '\n';
else
// For OS where argv[0] can end up as an empty string instead of the program's name.
std::cout << "Usage: <program name> <SED Filename> <Interface Name to be used on IED> <IED Name>" << '\n';
return 1;
}
// Specify SED Filename
// Error-checking not included (Assume sed_filename is correct and SED file is well-formed)
const char *sed_filename = argv[1];
// Specify Network Interface Name to be used on IED for inter-substation communication
const char *ifname = argv[2];
// Save IPv4 address of specified Network Interface into ifreq structure: ifr
struct ifreq ifr;
getIPv4Add(ifr, ifname);
// Specify IED name
const char *ied_name = argv[3];
// Specify filename to parse
std::vector<ControlBlock> vector_of_ctrl_blks = parse_sed(sed_filename);
/* DEBUGGING CODE: check Control Blocks parsed from SED file */
// printCtrlBlkVect(vector_of_ctrl_blks);
// Find relevant Control Blocks pertaining to IED
std::vector<GooseSvData> ownControlBlocks{};
unsigned int goose_counter{0}, sv_counter{0};
for (std::vector<ControlBlock>::const_iterator it = vector_of_ctrl_blks.cbegin(); it != vector_of_ctrl_blks.cend(); ++it)
{
if ((*it).hostIED == ied_name)
{
if ((*it).cbType == "GSE")
{
goose_counter++;
GooseSvData tmp_goose_data{};
tmp_goose_data.cbName = (*it).cbName;
tmp_goose_data.cbType = (*it).cbType;
tmp_goose_data.appID = (*it).appID;
tmp_goose_data.multicastIP = (*it).multicastIP;
tmp_goose_data.datSetName = (*it).datSetName;
tmp_goose_data.goose_counter = goose_counter;
ownControlBlocks.push_back(tmp_goose_data);
}
else if ((*it).cbType == "SMV")
{
sv_counter++;
GooseSvData tmp_sv_data{};
tmp_sv_data.cbName = (*it).cbName;
tmp_sv_data.cbType = (*it).cbType;
tmp_sv_data.appID = (*it).appID;
tmp_sv_data.multicastIP = (*it).multicastIP;
tmp_sv_data.sv_counter = sv_counter;
ownControlBlocks.push_back(tmp_sv_data);
}
}
}
// Keep looping to send multicast messages
unsigned int s_value{0};
while(1)
{
// sleep(1); // in seconds
usleep(1'000'000); // in microseconds
// Form network packet for each Control Block
for (size_t i = 0; i < ownControlBlocks.size(); i++)
{
// For forming Payload in Application Profile
std::vector<unsigned char> payload{};
// PDU will be part of Payload
std::vector<unsigned char> pdu{};
if (ownControlBlocks[i].cbType == "GSE")
{
std::cout << "cbName " << ownControlBlocks[i].cbName << endl;
ownControlBlocks[i].s_value = s_value;
form_goose_pdu(ownControlBlocks[i], pdu);
// Payload Type 0x81: non-tunneled GOOSE APDU
payload.push_back(0x81);
}
else if (ownControlBlocks[i].cbType == "SMV")
{
std::cout << "cbName " << ownControlBlocks[i].cbName << endl;
ownControlBlocks[i].s_value = s_value;
form_sv_pdu(ownControlBlocks[i], pdu);
// Payload Type 0x82: non-tunneled SV APDU
payload.push_back(0x82);
}
/* Continue forming Payload */
// Simulation 0x00: Boolean False = payload not sent for test
payload.push_back(0x00);
// APP ID
unsigned long raw_converted_appid = std::stoul(ownControlBlocks[i].appID,nullptr,16);
payload.push_back(static_cast<unsigned char>( (raw_converted_appid >> 8) & 0xFF ));
payload.push_back(static_cast<unsigned char>( (raw_converted_appid ) & 0xFF ));
// APDU Length
size_t apdu_len{pdu.size() + 2}; // Length of SV or GOOSE PDU plus the APDU Length field itself
payload.push_back(static_cast<unsigned char>( (apdu_len >> 8) & 0xFF ));
payload.push_back(static_cast<unsigned char>( (apdu_len ) & 0xFF ));
// PDU
payload.insert(payload.end(), pdu.begin(), pdu.end()); // Payload completely formed here
/* Based on RFC-1240 protocol (OSI connectionless transport services on top of UDP) */
std::vector<unsigned char> udp_data{};
// Length Identifier (LI)
udp_data.push_back(0x01);
// Transport Identifier (TI)
udp_data.push_back(0x40);
/* Based on IEC 61850-90-5 session protocol specification */
// Session Identifier (SI)
if (ownControlBlocks[i].cbType == "GSE")
{
udp_data.push_back(0xA1); // 0xA1: non-tunneled GOOSE APDU
}
else if (ownControlBlocks[i].cbType == "SMV")
{
udp_data.push_back(0xA2); // 0xA2: non-tunneled SV APDU
}
// Length Identifier (LI)
udp_data.push_back(0x18); // 0x18 => 24 bytes = CommonHeader [1 byte] + LI [1 byte] + (SPDU Length + ... + Key ID) [22 bytes]
// Common session header
udp_data.push_back(0x80); // Parameter Identifier (PI) of 0x80 as per IEC 61850-90-5
// Length Identifier (LI)
udp_data.push_back(0x16); // 0x16 => 22 bytes = (SPDU Length + ... + Version Number) [10 bytes] + (Time of current key + ... + Key ID) [12 bytes]
// SPDU Length (fixed size 4-byte word with maximum value of 65,517)
/*
* SPDU Number: 4 bytes
* Version Number: 2 bytes
* Security Information: 12 bytes
* Payload Length: 4 bytes
* Payload: (as formed)
* Signature: 2 bytes (signature production not considered => only 1-byte Tag + 1-byte Length
*/
unsigned int spdu_length = (4 + 2) + 12 + 4 + payload.size() + 2;
udp_data.push_back(static_cast<unsigned char>( (spdu_length >> 24) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (spdu_length >> 16) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (spdu_length >> 8) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (spdu_length ) & 0xFF ));
// SPDU Number (fixed size 4-byte unsigned integer word)
unsigned int current_SPDUNum = ownControlBlocks[i].prev_spduNum++;
udp_data.push_back(static_cast<unsigned char>( (current_SPDUNum >> 24) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (current_SPDUNum >> 16) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (current_SPDUNum >> 8) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (current_SPDUNum ) & 0xFF ));
// Version Number (fixed 2-byte unsigned integer, assigned to 1 in this implementation)
udp_data.push_back(0x00);
udp_data.push_back(0x01);
// Security Information (not used in this implementation, hence set to 0's)
/* Time of current key: 4 bytes
* Time to next key: 2 bytes
* Security Algorithm: 2 bytes
* Key ID: 4 bytes
* ----------------------------
* TOTAL: 12 bytes
*/
for (size_t j{0}; j < 12; ++j)
{
udp_data.push_back(0x00);
}
// Form the Session User Information: prepend Payload Length to & append Signature to the Payload
// Payload Length (fixed size 4-byte unsigned integer with maximum value of 65,399
size_t payload_len{payload.size() + 4}; // Length of Payload plus Payload Length field itself
udp_data.push_back(static_cast<unsigned char>( (payload_len >> 24) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (payload_len >> 16) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (payload_len >> 8) & 0xFF ));
udp_data.push_back(static_cast<unsigned char>( (payload_len ) & 0xFF ));
udp_data.insert(udp_data.end(), payload.begin(), payload.end());
// Signature Tag = 0x85
udp_data.push_back(0x85);
// Length of HMAC considered as zero in this implementation
udp_data.push_back(0x00); // Application Profile = UDP Data completely formed here
// Send via UDP multicast (ref: udpSock.hpp)
UdpSock sock;
diagnose(sock.isGood(), "Opening datagram socket for send");
// Set multicast protocol network parameters
sockaddr_in groupSock = {}; // init to all zeroes
groupSock.sin_family = AF_INET;
groupSock.sin_port = htons(IEDUDPPORT);
inet_pton(AF_INET, ownControlBlocks[i].multicastIP.c_str(), &(groupSock.sin_addr));
// Set local network interface to send multicast messages
in_addr localIface = ((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr;
diagnose(setsockopt(sock(), IPPROTO_IP, IP_MULTICAST_IF, (char*)&localIface,
sizeof(localIface)) >= 0, "Setting local interface");
// Set TTL
int ttl = 16;
diagnose(setsockopt(sock(), IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
sizeof(ttl)) >= 0, "Setting TTL");
diagnose(sendto(sock(), &udp_data[0], udp_data.size(), 0,
(sockaddr*)&groupSock, sizeof(groupSock)) >= 0,
"Sending datagram message");
}
s_value++;
}
return 0;
}