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uds-server.c
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uds-server.c
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/*
* Instrument cluster simulator
*
* (c) 2014 Open Garages - Craig Smith <craig@theialabs.com>
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <getopt.h>
#include <time.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <net/if.h>
#include <linux/can.h>
#include <linux/can/raw.h>
#include "uds-server.h"
#define DEBUG 0
//#define VIN "1G1ZT53826F109149"
//#define VIN "5YJSA1S2FEFA00001"
#define VIN "WAUZZZ8V9FA149850"
//#define VIN "2B3KA43R86H389824"
#define DATA_ALPHA 0
#define DATA_ALPHANUM 1
#define DATA_BINARY 2
/* Globals */
int running = 0;
int verbose = 0;
int no_flow_control = 0;
int fuzz_level = 0;
int keep_spec = 0;
FILE *plogfp = NULL;
char *vin = VIN;
struct timeval start_tv;
int pending_data;
struct can_frame gm_data_by_id;
long gm_lastcms = 0;
/* This is for flow control packets */
char gBuffer[255];
int gBufSize;
int gBufLengthRemaining;
int gBufCounter;
/* Prototypes */
void print_pkt(struct canfd_frame);
void print_bin(unsigned char *, int);
void usage(char *app, char *msg) {
printf("Simulates UDS responses\n");
if (msg) printf("%s\n", msg);
printf("Usage: %s [options] <can_interface>\n", app);
printf("\t-z\t\tIncrease fuzz level\n");
printf("\t-v\t\tVerbose\n");
printf("\t-l <logfile>\tLog output to file instead of STDOUT\n");
printf("\t-c\t\tDon't fuzz ISOTP Spec, just data\n");
printf("\t-F\t\tDisable flow control (Functional Addressing)\n");
printf("\t-V <vin>\tSpecify VIN (Default: %s)\n", VIN);
printf("\n");
exit(1);
}
// Simple function to print logging info to screen or to a file
void plog(char *fmt, ...) {
va_list args;
char buf[2046];
int len;
va_start(args, fmt);
len = vsnprintf(buf, 2045, fmt, args);
va_end(args);
if(plogfp) {
len = fwrite(buf, 1, len, plogfp);
} else {
printf("%s", buf);
}
}
void intHandler(int sig) {
running = 0;
}
// Generates data into a buff and returns it.
char *gen_data(int scope, int size) {
char *charset, *buf;
unsigned char byte;
int num;
int i;
buf = malloc(size);
memset(buf,0,size);
switch(scope) {
case DATA_ALPHA:
charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
for(i = 0; i < size; i++) {
buf[i] = charset[rand() % strlen(charset)];
}
break;
case DATA_ALPHANUM:
charset = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
for(i = 0; i < size; i++) {
num = rand() % strlen(charset);
byte = charset[num];
if (DEBUG) printf("DEBUG: random byte[%d] = %d %02X\n", i, num, byte);
buf[i] = byte;
}
break;
case DATA_BINARY:
for(i = 0; i < size; i++) {
buf[i] = rand() % 256;
}
default:
break;
}
return buf;
}
// If a flow control packet comes in, push out more data
// This isn't fully supported, just a hack at the moment
void flow_control_push_to(int can, int id) {
struct canfd_frame frame;
int nbytes;
if(no_flow_control) return;
if(verbose) plog("FC: Flushing ISOTP buffers\n");
frame.can_id = id;
while(gBufLengthRemaining > 0) {
if(gBufLengthRemaining > 7) {
frame.len = 8;
frame.data[0] = gBufCounter;
memcpy(&frame.data[1], gBuffer+(gBufSize-gBufLengthRemaining), 7);
nbytes = write(can, &frame, CAN_MTU);
if(nbytes < 0) perror("Write packet (FC)");
gBufCounter++;
gBufLengthRemaining -= 7;
} else {
frame.len = gBufLengthRemaining + 1;
frame.data[0] = gBufCounter;
memcpy(&frame.data[1], gBuffer+(gBufSize-gBufLengthRemaining), CAN_MTU);
nbytes = write(can, &frame, CAN_MTU);
if(nbytes < 0) perror("Write packet (FC Final)");
gBufLengthRemaining = 0;
}
}
}
void flow_control_push(int can) {
flow_control_push_to(can, 0x7e8);
}
void isotp_send_to(int can, char *data, int size, int dest) {
struct canfd_frame frame;
int left = size;
int counter;
int nbytes;
if(size > 256) return;
frame.can_id = dest;
if(size < 7) {
frame.len = size + 1;
frame.data[0] = size;
memcpy(&frame.data[1], data, size);
nbytes = write(can, &frame, CAN_MTU);
if(nbytes < 0) perror("Write packet");
} else {
frame.len = 8;
frame.data[0] = 0x10;
if(fuzz_level > 2 && keep_spec == 0) {
frame.data[1] = rand() % 256;
printf("Breaking ISOTP specs real size = %d reported size = %d\n", size, frame.data[1]);
} else {
frame.data[1] = (char)size-1;
}
memcpy(&frame.data[2], data, 6);
nbytes = write(can, &frame, CAN_MTU);
if(nbytes < 0) perror("Write packet");
left -= 6;
counter = 0x21;
if(no_flow_control) {
while(left > 0) {
if(left > 7) {
frame.len = 8;
frame.data[0] = counter;
memcpy(&frame.data[1], data+(size-left), 7);
write(can, &frame, CAN_MTU);
counter++;
left -= 7;
} else {
frame.len = left + 1;
frame.data[0] = counter;
memcpy(&frame.data[1], data+(size-left), CAN_MTU);
write(can, &frame, frame.len);
left = 0;
}
}
} else { // FC
memcpy(gBuffer, data, size); // Size is restricted to <256
gBufSize = size;
gBufLengthRemaining = left;
gBufCounter = counter;
}
}
}
void isotp_send(int can, char *data, int size) {
isotp_send_to(can, data, size, 0x7e8);
}
/*
* Some UDS queries requiest periodic data. This handles those
*/
void handle_pending_data(int can) {
struct canfd_frame frame;
struct timeval tv;
long currcms;
int i, offset, datacnt;
if(!pending_data) return;
gettimeofday(&tv, NULL);
currcms = (tv.tv_sec - start_tv.tv_sec) * 100 + (tv.tv_usec / 10000);
if(IS_SET(pending_data, PENDING_READ_DATA_BY_ID_GM)) {
if(gm_data_by_id.data[0] == 0xFE) {
offset = 1;
} else {
offset = 0;
}
frame.can_id = gm_data_by_id.can_id;
frame.len = 8;
switch(gm_data_by_id.data[2 + offset]) { // Subfunctions
case 0x02: // Slow Rate
if (currcms - gm_lastcms > 1000) {
for(i=3; i < gm_data_by_id.data[0]+1; i++) {
frame.data[0] = gm_data_by_id.data[i];
for(datacnt=1; datacnt < 8; datacnt++) {
frame.data[datacnt] = rand() % 255;
}
write(can, &frame, CAN_MTU);
if(verbose > 1) plog(" + Sending GM data (%02X) at a slow rate\n", frame.data[0]);
}
gm_lastcms = currcms;
}
break;
case 0x03: // Medium Rate
if (currcms - gm_lastcms > 100) {
for(i=3; i < gm_data_by_id.data[0]+1; i++) {
frame.data[0] = gm_data_by_id.data[i];
for(datacnt=1; datacnt < 8; datacnt++) {
frame.data[datacnt] = rand() % 255;
}
write(can, &frame, CAN_MTU);
if(verbose > 1) plog(" + Sending GM data (%02X) at a medium rate\n", frame.data[0]);
}
gm_lastcms = currcms;
}
break;
case 0x04: // Fast Rate
if (currcms - gm_lastcms > 20) {
for(i=3; i < gm_data_by_id.data[0]+1; i++) {
frame.data[0] = gm_data_by_id.data[i];
for(datacnt=1; datacnt < 8; datacnt++) {
frame.data[datacnt] = rand() % 255;
}
write(can, &frame, CAN_MTU);
if(verbose > 1) plog(" + Sending GM data (%02X) at a fast rate\n", frame.data[0]);
}
gm_lastcms = currcms;
}
break;
default:
plog("Unknown subfunction timer\n");
break;
}
} // IS_SET PENDING_READ_DATA_BY_ID_GM
}
void send_dtcs(int can, char total, struct canfd_frame frame) {
char resp[1024];
char i;
memset(resp, 0, 1024);
switch(fuzz_level) {
case 0: // Default is to make P01XX where XX = total number of DTCs
resp[0] = frame.data[1] + 0x40;
resp[1] = total; // Total DTCs
for(i = 0; i <= total*2; i+=2) {
resp[2+i] = 1;
resp[2+i+1] = i;
}
if(total == 0) {
isotp_send(can, resp, 2);
} else if (total < 3) {
isotp_send(can, resp, 2+(total*2));
} else {
isotp_send(can, resp, total*2);
}
break;
case 1:
resp[0] = frame.data[1] + 0x40;
resp[1] = rand() % 256;
if (verbose) plog("Randomized total DTCs to %d real DTCs %d\n", resp[1], total);
for(i = 0; i <= total*2; i+=2) {
resp[2+i] = 1;
resp[2+i+1] = i;
}
if(total == 0) {
isotp_send(can, resp, 2);
} else if (total < 3) {
isotp_send(can, resp, 2+(total*2));
} else {
isotp_send(can, resp, total*2);
}
break;
case 2:
default:
resp[0] = frame.data[1] + 0x40;
total = rand() % 128;
resp[1] = total;
if (verbose) plog("Randomized total DTCs to %d\n", resp[1]);
for(i = 0; i <= total*2; i+=2) {
resp[2+i] = rand() % 256;
resp[2+i+1] = rand() % 256;
}
if (verbose) {
plog("DTC random data is:\n");
print_bin(&resp[2], total*2);
}
if(total == 0) {
isotp_send(can, resp, 2);
} else if (total < 3) {
isotp_send(can, resp, 2+(total*2));
} else {
isotp_send(can, resp, total*2);
}
break;
}
}
unsigned char calc_vin_checksum(char *vin, int size) {
char w[17] = { 8, 7, 6, 5, 4, 3, 2, 10, 0, 9, 8, 7, 6, 5, 4, 3, 2 };
int i;
int checksum = 0;
int num;
for(i=0; i < size; i++) {
if(vin[i] == 'I' || vin[i] == 'O' || vin[i] == 'Q') {
num = 0;
} else {
if(vin[i] >= '0' && vin[i] <='9') num = vin[i] - '0';
if(vin[i] >= 'A' && vin[i] <='I') num = (vin[i] - 'A') + 1;
if(vin[i] >= 'J' && vin[i] <='R') num = (vin[i] - 'J') + 1;
if(vin[i] >= 'S' && vin[i] <='Z') num = (vin[i] - 'S') + 2;
}
checksum += num * w[i];
}
checksum = checksum % 11;
if (checksum == 10) return 'X';
return ('0' + checksum);
}
void send_error_snfs(int can, struct canfd_frame frame) {
char resp[4];
if(verbose) plog("Responded with Sub Function Not Supported\n");
resp[0] = 0x7f;
resp[1] = frame.data[1];
resp[2] = 12; // SubFunctionNotSupported
isotp_send(can, resp, 3);
}
void send_error_roor(int can, struct canfd_frame frame, int id) {
char resp[4];
if(verbose) plog("Responded with Sub Function Not Supported\n");
resp[0] = 0x7f;
resp[1] = frame.data[1];
resp[2] = 31; // RequestOutOfRange
isotp_send_to(can, resp, 3, id);
}
void generic_OK_resp(int can, struct canfd_frame frame) {
char resp[4];
if(verbose > 1) plog("Responding with a generic OK message\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0;
isotp_send(can, resp, 3);
}
void generic_OK_resp_to(int can, struct canfd_frame frame, int id) {
char resp[4];
if(verbose > 1) plog("Responding with a generic OK message\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0;
isotp_send_to(can, resp, 3, id);
}
void handle_current_data(int can, struct canfd_frame frame) {
if(verbose) plog("Received Current info request\n");
char resp[8];
switch(frame.data[2]) {
case 0x00: // Supported PIDs
if(verbose) plog("Responding with a generic set of PIDs (1-20)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
case 0x01: // MIL & DTC Status
if(verbose) plog("Responding to MIL and DTC Status request\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x00;
resp[3] = 0x07;
resp[4] = 0xE5;
resp[5] = 0xE5;
isotp_send(can, resp, 6);
break;
case 0x20: // More supported PIDs (21-40)
if(verbose) plog("Responding with PIDs supported (21-40)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
case 0x40: // More supported PIDs (41-60)
if(verbose) plog("Responding with PIDs supported (41-60)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
case 0x41: // Monitor status this drive cycle
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0;
resp[3] = 0x0F;
resp[4] = 0xFF;
resp[5] = 0x00;
isotp_send(can, resp, 6);
break;
case 0x60: // More supported PIDs (61-80)
if(verbose) plog("Responding with PIDs supported (61-80)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
case 0x80: // More supported PIDs (81-100)
if(verbose) plog("Responding with PIDs supported (81-100)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
case 0xA0: // More Supported PIDs (101-120)
if(verbose) plog("Responding with PIDs supported (101-120)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
case 0xC0: // More supported PIDs (121-140)
if(verbose) plog("Responding with PIDs supported (121-140)\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xBF;
resp[3] = 0xBF;
resp[4] = 0xB9;
resp[5] = 0x93;
isotp_send(can, resp, 6);
break;
default:
if(verbose) plog("Note: Requested unsupported service %02X\n", frame.data[2]);
break;
}
}
void handle_vehicle_info(int can, struct canfd_frame frame) {
char *buf;
int pktsize = 0;
unsigned char chksum;
if(verbose) plog("Received Vehicle info request\n");
char resp[300];
switch(frame.data[2]) {
case 0x00: // Supported PIDs
if(verbose) plog("Replying with ALL Pids supported\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x55;
resp[3] = 0;
resp[4] = 0;
resp[5] = 0;
isotp_send(can, resp, 6);
break;
case 0x02: // Get VIN
switch(fuzz_level) {
case 0:
if(verbose) plog("Sending VIN %s\n", vin);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 1;
memcpy(&resp[3], vin, strlen(vin));
isotp_send(can, resp, 4 + strlen(vin));
break;
case 1:
if(verbose) plog("Fuzzing VIN with printable chars\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 1;
buf = gen_data(DATA_ALPHANUM, 17);
chksum = calc_vin_checksum(buf, 17);
buf[8] = chksum;
if(verbose) plog("Using VIN: %s\n", buf);
memcpy(&resp[3], buf, 17);
free(buf);
isotp_send(can, resp, 4 + 17);
break;
case 2:
case 3: // At 3 the ISOTP spec gets flaky
pktsize = rand() % 252;
if(verbose) plog("Fuzzing big VIN with printable chars\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 1;
buf = gen_data(DATA_ALPHANUM, pktsize);
chksum = calc_vin_checksum(buf, pktsize);
buf[8] = chksum;
if(verbose) plog("Using big VIN (%d chars): %s\n",pktsize, buf);
memcpy(&resp[3], buf, pktsize);
free(buf);
isotp_send(can, resp, 4 + pktsize);
break;
case 4:
if(verbose) plog("Fuzzing VIN with binary data\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 1;
buf = gen_data(DATA_BINARY, 17);
chksum = calc_vin_checksum(buf, 17);
buf[8] = chksum;
if(verbose) print_bin(buf, 17);
memcpy(&resp[3], buf, 17);
free(buf);
isotp_send(can, resp, 4 + 17);
break;
case 5:
default:
pktsize = rand() % 252;
if(verbose) plog("Fuzzing VIN with binary data with size %d\n", pktsize);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 1;
buf = gen_data(DATA_BINARY, pktsize);
if(verbose) print_bin(buf, pktsize);
memcpy(&resp[3], buf, pktsize);
free(buf);
isotp_send(can, resp, 4 + pktsize);
break;
}
break;
default:
break;
}
}
void handle_pending_codes(int can, struct canfd_frame frame) {
if(verbose) plog("Received request for pending trouble codes\n");
send_dtcs(can, 20, frame);
}
void handle_stored_codes(int can, struct canfd_frame frame) {
if(verbose) plog("Received request for stored trouble codes\n");
send_dtcs(can, 2, frame);
}
// TODO: This is wrong. Record a real transaction to see the format
void handle_freeze_frame(int can, struct canfd_frame frame) {
if(verbose) plog("Received request for freeze frame code\n");
//send_dtcs(can, 1, frame);
char resp[4];
resp[0] = frame.data[1] + 0x40;
resp[1] = 0x01;
resp[2] = 0x01;
isotp_send(can, resp, 3);
}
void handle_perm_codes(int can, struct canfd_frame frame) {
if(verbose) plog("Received request for permanent trouble codes\n");
send_dtcs(can, 0, frame);
}
void handle_dsc(int can, struct canfd_frame frame) {
//if(verbose) plog("Received DSC Request\n");
//send_error_snfs(can, frame);
if(verbose) plog("Received DSC Request giving VCDS respose\n");
frame.can_id = 0x77A;
frame.len = 8;
frame.data[0] = 0x06;
frame.data[1] = 0x50;
frame.data[2] = 0x03;
frame.data[3] = 0x00;
frame.data[4] = 0x32;
frame.data[5] = 0x01;
frame.data[6] = 0xF4;
frame.data[7] = 0xAA;
write(can, &frame, CAN_MTU);
}
/*
ECU Memory, based on VCDS response for now
*/
void handle_read_data_by_id(int can, struct canfd_frame frame) {
if(verbose) plog("Recieved Read Data by ID %02X %02X\n", frame.data[2], frame.data[3]);
char resp[120];
if(frame.data[2] = 0xF1) {
switch(frame.data[3]) {
case 0x87:
if(verbose) plog("Read data by ID 0x87\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x87;
resp[3] = 0x30;
resp[4] = 0x34;
resp[5] = 0x45;
resp[6] = 0x39;
resp[7] = 0x30;
resp[8] = 0x36;
resp[9] = 0x33;
resp[10] = 0x32;
resp[11] = 0x33;
resp[12] = 0x46;
resp[13] = 0x20; // Note VCDS pads with 55's
isotp_send_to(can, resp, 14, 0x77A);
break;
case 0x89:
if(verbose) plog("Read data by ID 0x89\n");
frame.can_id = 0x7E8;
frame.len = 8;
frame.data[0] = 0x07;
frame.data[1] = 0x62;
frame.data[2] = 0xF1;
frame.data[3] = 0x89;
frame.data[4] = 0x38; //8
frame.data[5] = 0x34; //4
frame.data[6] = 0x31; //1
frame.data[7] = 0x30; //0
write(can, &frame, CAN_MTU);
break;
case 0x9E:
if(verbose) plog("Read data by ID 0x9E\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x45;
resp[3] = 0x56;
resp[4] = 0x5F;
resp[5] = 0x47;
resp[6] = 0x61;
resp[7] = 0x74;
resp[8] = 0x65;
resp[9] = 0x77;
resp[10] = 0x45;
resp[11] = 0x56;
resp[12] = 0x43;
resp[13] = 0x6F;
resp[14] = 0x6E;
resp[15] = 0x74;
resp[16] = 0x69;
resp[17] = 0x00;
isotp_send(can, resp, 0x13);
break;
case 0xA2:
if(verbose) plog("Read data by ID 0xA2\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0xA2;
resp[3] = 0x30; // 004010
resp[4] = 0x30;
resp[5] = 0x34;
resp[6] = 0x30;
resp[7] = 0x31;
resp[8] = 0x30;
isotp_send(can, resp, 9);
break;
default:
if(verbose) plog("Not responding to ID %02X\n", frame.data[3]);
break;
}
} else if(frame.data[2] == 0x06) {
switch(frame.data[3]) {
case 0x00:
if(verbose) plog("Read data by ID 0x9E\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x02;
resp[3] = 0x01;
resp[4] = 0x00;
resp[5] = 0x17;
resp[6] = 0x26;
resp[7] = 0xF2;
resp[8] = 0x00;
resp[9] = 0x00;
resp[10] = 0x5B;
resp[11] = 0x00;
resp[12] = 0x12;
resp[13] = 0x08;
resp[14] = 0x58;
resp[15] = 0x00;
resp[16] = 0x00;
resp[17] = 0x00;
resp[18] = 0x00;
resp[19] = 0x01;
resp[20] = 0x01;
resp[21] = 0x01;
resp[22] = 0x00;
resp[23] = 0x01;
resp[24] = 0x00;
resp[25] = 0x00;
resp[26] = 0x00;
resp[27] = 0x00;
resp[28] = 0x00;
resp[29] = 0x00;
resp[30] = 0x00;
resp[31] = 0x00;
isotp_send(can, resp, 0x21);
break;
case 0x01:
if(verbose) plog("Read data by ID 0x01\n");
send_error_roor(can, frame, 0x7E8);
break;
default:
if(verbose) plog("Not responding to ID %02X\n", frame.data[3]);
break;
}
} else {
if(verbose) plog("Unknown read data by ID %02X\n", frame.data[2]);
}
}
/*
GM
*/
// Read DID from ID (GM)
// For now we are only setting this up to work with the BCM
// 244 [3] 02 1A 90
void handle_gm_read_did_by_id(int can, struct canfd_frame frame) {
if(verbose) plog("Received GM Read DID by ID Request\n");
char resp[300];
char *buf;
char *tracenum = "874602RA51950204";
unsigned char chksum;
int pktsize;
switch(frame.data[2]) {
case 0x90: // VIN
if(verbose) plog(" + Requested VIN\n");
switch(fuzz_level) {
case 0:
if(verbose) plog("Sending VIN %s\n", vin);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
memcpy(&resp[2], vin, strlen(vin));
isotp_send_to(can, resp, 3 + strlen(vin), 0x644);
break;
case 1:
if(verbose) plog("Fuzzing VIN with printable chars\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
buf = gen_data(DATA_ALPHANUM, 17);
chksum = calc_vin_checksum(buf, 17);
buf[8] = chksum;
if(verbose) plog("Using VIN: %s\n", buf);
memcpy(&resp[2], buf, 17);
free(buf);
isotp_send_to(can, resp, 3 + 17, 0x644);
break;
case 2:
case 3: // At 3 the ISOTP spec gets flaky
pktsize = rand() % 252;
if(verbose) plog("Fuzzing big VIN with printable chars\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
buf = gen_data(DATA_ALPHANUM, pktsize);
chksum = calc_vin_checksum(buf, pktsize);
buf[8] = chksum;
if(verbose) plog("Using big VIN (%d chars): %s\n",pktsize, buf);
memcpy(&resp[2], buf, pktsize);
free(buf);
isotp_send_to(can, resp, 3 + pktsize, 0x644);
break;
case 4:
if(verbose) plog("Fuzzing VIN with binary data\n");
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
buf = gen_data(DATA_BINARY, 17);
chksum = calc_vin_checksum(buf, 17);
buf[8] = chksum;
if(verbose) print_bin(buf, 17);
memcpy(&resp[2], buf, 17);
free(buf);
isotp_send_to(can, resp, 3 + 17, 0x644);
break;
case 5:
default:
pktsize = rand() % 252;
if(verbose) plog("Fuzzing VIN with binary data with size %d\n", pktsize);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
buf = gen_data(DATA_BINARY, pktsize);
if(verbose) print_bin(buf, pktsize);
memcpy(&resp[2], buf, pktsize);
free(buf);
isotp_send_to(can, resp, 3 + pktsize, 0x644);
break;
}
break;
case 0xA1: // SDM Primary Key
if(verbose) plog(" + Requested SDM Primary Key\n");
switch(fuzz_level) {
case 0:
default:
if(verbose) plog("Sending SDM Key %04X\n", 0x6966);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x69;
resp[3] = 0x66;
isotp_send_to(can, resp, 5, 0x644);
break;
}
break;
case 0xB4: // Traceability Number
if(verbose) plog(" + Requested Traceability Number\n");
switch(fuzz_level) {
case 0:
default:
if(verbose) plog("Sending Traceabiliity number %s\n", tracenum);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
memcpy(&resp[2], tracenum, strlen(tracenum));
isotp_send_to(can, resp, 3 + strlen(tracenum), 0x644);
break;
}
break;
case 0xB7: // Software Number
if(verbose) plog(" + Requested Software Number\n");
switch(fuzz_level) {
case 0:
default:
if(verbose) plog("Sending SW # %d\n", 600);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x42;
resp[3] = 0xAA;
resp[4] = 6;
resp[5] = 2; // 600
resp[6] = 0x58;
isotp_send_to(can, resp, 6, 0x644);
break;
}
break;
case 0xCB: // End Model Part #
if(verbose) plog(" + Requested End Model Part Number\n");
switch(fuzz_level) {
case 0:
default:
if(verbose) plog("Sending End Model Part Number %d\n", 15804602);
resp[0] = frame.data[1] + 0x40;
resp[1] = frame.data[2];
resp[2] = 0x00;
resp[3] = 0xF1;
resp[4] = 0x28;
resp[5] = 0xBA;
isotp_send_to(can, resp, 6, 0x644);
break;
}
break;
default:
break;
}
}
/* GM Read Data via PID */
/* 244 [5] 04 AA 03 02 07 */
/* 544#0738408D8B000200 */
/* 544#02508D8D00000000 */
void handle_gm_read_data_by_id(int can, struct canfd_frame frame) {
if(verbose) plog("Received GM Read Data by ID Request\n");
int offset = 0;
int i;
int datacnt;
char datacpy[8];
if (frame.data[0] == 0xFE) offset = 1;
memcpy(&datacpy, &frame.data, 8);
if(frame.can_id == 0x7e0) {
frame.can_id = 0x5e8;
} else {
frame.can_id = 0x500 + (frame.can_id & 0xFF);
}
frame.len = 8;
switch(frame.data[2 + offset]) { // Subfunctions
case 0x00: // Stop
if(verbose) plog(" + Stop Data Request\n");
memset(frame.data, 0, 8);
write(can, &frame, CAN_MTU);
CLEAR_BIT(pending_data, PENDING_READ_DATA_BY_ID_GM);
break;
case 0x01: // One Response
if(verbose) plog(" + One Response\n");
for(i=3; i < datacpy[0]+1; i++) {
frame.data[0] = datacpy[i];
for(datacnt=1; datacnt < 8; datacnt++) {
frame.data[datacnt] = rand() % 256;
}
write(can, &frame, CAN_MTU);
sleep(0.5);
}
break;
case 0x02: // Slow Rate
if(verbose) plog(" + Slow Rate\n");
SET_BIT(pending_data, PENDING_READ_DATA_BY_ID_GM);
memcpy(&gm_data_by_id, &frame, sizeof(frame));
break;
case 0x03: // Medium Rate
if(verbose) plog(" + Medium Rate\n");
SET_BIT(pending_data, PENDING_READ_DATA_BY_ID_GM);
memcpy(&gm_data_by_id, &frame, sizeof(frame));
break;
case 0x04: // Fast Rate
if(verbose) plog(" + Fast Rate\n");
SET_BIT(pending_data, PENDING_READ_DATA_BY_ID_GM);
memcpy(&gm_data_by_id, &frame, sizeof(frame));
break;
default:
plog("Unknown subfunction timer\n");
break;
}
}
/* GM Diag format is either
101#FE 03 A9 81 52 (Functional addressing: Where FE is the extended address)
7E0#03 A9 81 52 (no extended addressing)
*/
void handle_gm_read_diag(int can, struct canfd_frame frame) {
if(verbose) plog("Received GM Read Diagnostic Request\n");
int offset = 0;
int i, total;
char resp[150];
if(frame.data[0] == 0xFE) offset = 1;
switch(frame.data[2 + offset]) { // Subfunctions
case UDS_READ_STATUS_BY_MASK: // Read DTCs by mask
if(verbose) {
plog(" + Read DTCs by mask\n");
if(frame.data[3 + offset] & DTC_SUPPORTED_BY_CALIBRATION) plog(" - Supported By Calibration\n");
if(frame.data[3 + offset] & DTC_CURRENT_DTC) plog(" - Current DTC\n");
if(frame.data[3 + offset] & DTC_TEST_NOT_PASSED_SINCE_CLEARED) plog(" - Tests not passed since DTC cleared\n");
if(frame.data[3 + offset] & DTC_TEST_FAILED_SINCE_CLEARED) plog(" - Tests failed since DTC cleared\n");
if(frame.data[3 + offset] & DTC_HISTORY) plog(" - DTC History\n");
if(frame.data[3 + offset] & DTC_TEST_NOT_PASSED_SINCE_POWER) plog(" - Tests not passed since power up\n");
if(frame.data[3 + offset] & DTC_CURRENT_DTC_SINCE_POWER) plog(" - Tests failed since power up\n");
if(frame.data[3 + offset] & DTC_WARNING_INDICATOR_STATE) plog(" - Warning Indicator State\n");
}
if(frame.can_id == 0x7e0) {
frame.can_id = 0x5e8;
} else {
frame.can_id = 0x500 + (frame.can_id & 0xFF);
}
frame.len = 8;
frame.data[0] = frame.data[2 + offset];
frame.data[1] = 0; // DTC 1st byte
frame.data[2] = 0x30; // DTC 2nd byte
frame.data[3] = 0;
frame.data[4] = 0x6F; // Last Test/ This Ignition/ Last Clear bitflag
frame.data[5] = 0;
frame.data[6] = 0;
frame.data[7] = 0;
write(can, &frame, CAN_MTU);
sleep(0.2); // Instead of actually processing the FC
if(fuzz_level == 1) {
total = rand() % 1024;