X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/39cc1c879e3d75b3cafd79e4e139a7f6673dd349..496bb4be3306b86699abdab9ecf4e677fd61c92b:/client/cmdhf.c diff --git a/client/cmdhf.c b/client/cmdhf.c index d2201800..5aeb7ce4 100644 --- a/client/cmdhf.c +++ b/client/cmdhf.c @@ -11,16 +11,12 @@ #include "cmdhf.h" -#include -#include -#include +#include +#include "usb_cmd.h" #include "comms.h" -#include "util.h" #include "ui.h" -#include "iso14443crc.h" -#include "parity.h" -#include "cmdmain.h" #include "cmdparser.h" +#include "cliparser/cliparser.h" #include "cmdhf14a.h" #include "cmdhf14b.h" #include "cmdhf15.h" @@ -31,10 +27,11 @@ #include "cmdhfmfp.h" #include "cmdhfmfu.h" #include "cmdhftopaz.h" -#include "protocols.h" -#include "emv/cmdemv.h" #include "cmdhflist.h" #include "cmdhffido.h" +#include "cmddata.h" +#include "graph.h" +#include "fpga.h" static int CmdHelp(const char *Cmd); @@ -45,510 +42,6 @@ int CmdHFTune(const char *Cmd) return 0; } -/** - * @brief iso14443B_CRC_check Checks CRC in command or response - * @param isResponse - * @param data - * @param len - * @return 0 : CRC-command, CRC not ok - * 1 : CRC-command, CRC ok - * 2 : Not crc-command - */ - -uint8_t iso14443B_CRC_check(bool isResponse, uint8_t* data, uint8_t len) -{ - uint8_t b1,b2; - - if(len <= 2) return 2; - - ComputeCrc14443(CRC_14443_B, data, len-2, &b1, &b2); - if(b1 != data[len-2] || b2 != data[len-1]) { - return 0; - } else { - return 1; - } -} - -/** - * @brief iclass_CRC_Ok Checks CRC in command or response - * @param isResponse - * @param data - * @param len - * @return 0 : CRC-command, CRC not ok - * 1 : CRC-command, CRC ok - * 2 : Not crc-command - */ -uint8_t iclass_CRC_check(bool isResponse, uint8_t* data, uint8_t len) -{ - if(len < 4) return 2;//CRC commands (and responses) are all at least 4 bytes - - uint8_t b1, b2; - - if(!isResponse)//Commands to tag - { - /** - These commands should have CRC. Total length leftmost - 4 READ - 4 READ4 - 12 UPDATE - unsecured, ends with CRC16 - 14 UPDATE - secured, ends with signature instead - 4 PAGESEL - **/ - if(len == 4 || len == 12)//Covers three of them - { - //Don't include the command byte - ComputeCrc14443(CRC_ICLASS, (data+1), len-3, &b1, &b2); - return b1 == data[len -2] && b2 == data[len-1]; - } - return 2; - }else{ - /** - These tag responses should have CRC. Total length leftmost - - 10 READ data[8] crc[2] - 34 READ4 data[32]crc[2] - 10 UPDATE data[8] crc[2] - 10 SELECT csn[8] crc[2] - 10 IDENTIFY asnb[8] crc[2] - 10 PAGESEL block1[8] crc[2] - 10 DETECT csn[8] crc[2] - - These should not - - 4 CHECK chip_response[4] - 8 READCHECK data[8] - 1 ACTALL sof[1] - 1 ACT sof[1] - - In conclusion, without looking at the command; any response - of length 10 or 34 should have CRC - **/ - if(len != 10 && len != 34) return true; - - ComputeCrc14443(CRC_ICLASS, data, len-2, &b1, &b2); - return b1 == data[len -2] && b2 == data[len-1]; - } -} - - -bool is_last_record(uint16_t tracepos, uint8_t *trace, uint16_t traceLen) -{ - return(tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) >= traceLen); -} - - -bool next_record_is_response(uint16_t tracepos, uint8_t *trace) -{ - uint16_t next_records_datalen = *((uint16_t *)(trace + tracepos + sizeof(uint32_t) + sizeof(uint16_t))); - - return(next_records_datalen & 0x8000); -} - - -bool merge_topaz_reader_frames(uint32_t timestamp, uint32_t *duration, uint16_t *tracepos, uint16_t traceLen, uint8_t *trace, uint8_t *frame, uint8_t *topaz_reader_command, uint16_t *data_len) -{ - -#define MAX_TOPAZ_READER_CMD_LEN 16 - - uint32_t last_timestamp = timestamp + *duration; - - if ((*data_len != 1) || (frame[0] == TOPAZ_WUPA) || (frame[0] == TOPAZ_REQA)) return false; - - memcpy(topaz_reader_command, frame, *data_len); - - while (!is_last_record(*tracepos, trace, traceLen) && !next_record_is_response(*tracepos, trace)) { - uint32_t next_timestamp = *((uint32_t *)(trace + *tracepos)); - *tracepos += sizeof(uint32_t); - uint16_t next_duration = *((uint16_t *)(trace + *tracepos)); - *tracepos += sizeof(uint16_t); - uint16_t next_data_len = *((uint16_t *)(trace + *tracepos)) & 0x7FFF; - *tracepos += sizeof(uint16_t); - uint8_t *next_frame = (trace + *tracepos); - *tracepos += next_data_len; - if ((next_data_len == 1) && (*data_len + next_data_len <= MAX_TOPAZ_READER_CMD_LEN)) { - memcpy(topaz_reader_command + *data_len, next_frame, next_data_len); - *data_len += next_data_len; - last_timestamp = next_timestamp + next_duration; - } else { - // rewind and exit - *tracepos = *tracepos - next_data_len - sizeof(uint16_t) - sizeof(uint16_t) - sizeof(uint32_t); - break; - } - uint16_t next_parity_len = (next_data_len-1)/8 + 1; - *tracepos += next_parity_len; - } - - *duration = last_timestamp - timestamp; - - return true; -} - - -uint16_t printTraceLine(uint16_t tracepos, uint16_t traceLen, uint8_t *trace, uint8_t protocol, bool showWaitCycles, bool markCRCBytes) -{ - bool isResponse; - uint16_t data_len, parity_len; - uint32_t duration; - uint8_t topaz_reader_command[9]; - uint32_t timestamp, first_timestamp, EndOfTransmissionTimestamp; - char explanation[30] = {0}; - uint8_t mfData[32] = {0}; - size_t mfDataLen = 0; - - if (tracepos + sizeof(uint32_t) + sizeof(uint16_t) + sizeof(uint16_t) > traceLen) return traceLen; - - first_timestamp = *((uint32_t *)(trace)); - timestamp = *((uint32_t *)(trace + tracepos)); - - tracepos += 4; - duration = *((uint16_t *)(trace + tracepos)); - tracepos += 2; - data_len = *((uint16_t *)(trace + tracepos)); - tracepos += 2; - - if (data_len & 0x8000) { - data_len &= 0x7fff; - isResponse = true; - } else { - isResponse = false; - } - parity_len = (data_len-1)/8 + 1; - - if (tracepos + data_len + parity_len > traceLen) { - return traceLen; - } - uint8_t *frame = trace + tracepos; - tracepos += data_len; - uint8_t *parityBytes = trace + tracepos; - tracepos += parity_len; - - if (protocol == TOPAZ && !isResponse) { - // topaz reader commands come in 1 or 9 separate frames with 7 or 8 Bits each. - // merge them: - if (merge_topaz_reader_frames(timestamp, &duration, &tracepos, traceLen, trace, frame, topaz_reader_command, &data_len)) { - frame = topaz_reader_command; - } - } - - //Check the CRC status - uint8_t crcStatus = 2; - - if (data_len > 2) { - switch (protocol) { - case ICLASS: - crcStatus = iclass_CRC_check(isResponse, frame, data_len); - break; - case ISO_14443B: - case TOPAZ: - crcStatus = iso14443B_CRC_check(isResponse, frame, data_len); - break; - case PROTO_MIFARE: - crcStatus = mifare_CRC_check(isResponse, frame, data_len); - break; - case ISO_14443A: - crcStatus = iso14443A_CRC_check(isResponse, frame, data_len); - break; - default: - break; - } - } - //0 CRC-command, CRC not ok - //1 CRC-command, CRC ok - //2 Not crc-command - - //--- Draw the data column - //char line[16][110]; - char line[16][110]; - - for (int j = 0; j < data_len && j/16 < 16; j++) { - - uint8_t parityBits = parityBytes[j>>3]; - if (protocol != ISO_14443B && (isResponse || protocol == ISO_14443A) && (oddparity8(frame[j]) != ((parityBits >> (7-(j&0x0007))) & 0x01))) { - snprintf(line[j/16]+(( j % 16) * 4),110, "%02x! ", frame[j]); - } else { - snprintf(line[j/16]+(( j % 16) * 4), 110, " %02x ", frame[j]); - } - - } - - if (markCRCBytes) { - if(crcStatus == 0 || crcStatus == 1) - {//CRC-command - char *pos1 = line[(data_len-2)/16]+(((data_len-2) % 16) * 4); - (*pos1) = '['; - char *pos2 = line[(data_len)/16]+(((data_len) % 16) * 4); - sprintf(pos2, "%c", ']'); - } - } - - if(data_len == 0) - { - if(data_len == 0){ - sprintf(line[0],""); - } - } - //--- Draw the CRC column - - char *crc = (crcStatus == 0 ? "!crc" : (crcStatus == 1 ? " ok " : " ")); - - EndOfTransmissionTimestamp = timestamp + duration; - - if (protocol == PROTO_MIFARE) - annotateMifare(explanation, sizeof(explanation), frame, data_len, parityBytes, parity_len, isResponse); - - if(!isResponse) - { - switch(protocol) { - case ICLASS: annotateIclass(explanation,sizeof(explanation),frame,data_len); break; - case ISO_14443A: annotateIso14443a(explanation,sizeof(explanation),frame,data_len); break; - case ISO_14443B: annotateIso14443b(explanation,sizeof(explanation),frame,data_len); break; - case TOPAZ: annotateTopaz(explanation,sizeof(explanation),frame,data_len); break; - default: break; - } - } - - int num_lines = MIN((data_len - 1)/16 + 1, 16); - for (int j = 0; j < num_lines ; j++) { - if (j == 0) { - PrintAndLog(" %10d | %10d | %s |%-64s | %s| %s", - (timestamp - first_timestamp), - (EndOfTransmissionTimestamp - first_timestamp), - (isResponse ? "Tag" : "Rdr"), - line[j], - (j == num_lines-1) ? crc : " ", - (j == num_lines-1) ? explanation : ""); - } else { - PrintAndLog(" | | |%-64s | %s| %s", - line[j], - (j == num_lines-1) ? crc : " ", - (j == num_lines-1) ? explanation : ""); - } - } - - if (DecodeMifareData(frame, data_len, parityBytes, isResponse, mfData, &mfDataLen)) { - memset(explanation, 0x00, sizeof(explanation)); - if (!isResponse) { - explanation[0] = '>'; - annotateIso14443a(&explanation[1], sizeof(explanation) - 1, mfData, mfDataLen); - } - uint8_t crcc = iso14443A_CRC_check(isResponse, mfData, mfDataLen); - PrintAndLog(" | * | dec |%-64s | %-4s| %s", - sprint_hex(mfData, mfDataLen), - (crcc == 0 ? "!crc" : (crcc == 1 ? " ok " : " ")), - (true) ? explanation : ""); - }; - - if (is_last_record(tracepos, trace, traceLen)) return traceLen; - - if (showWaitCycles && !isResponse && next_record_is_response(tracepos, trace)) { - uint32_t next_timestamp = *((uint32_t *)(trace + tracepos)); - PrintAndLog(" %10d | %10d | %s | fdt (Frame Delay Time): %d", - (EndOfTransmissionTimestamp - first_timestamp), - (next_timestamp - first_timestamp), - " ", - (next_timestamp - EndOfTransmissionTimestamp)); - } - - return tracepos; -} - - -int CmdHFList(const char *Cmd) -{ - #ifdef WITH_SMARTCARD - PrintAndLog("TEST_WITH_SMARTCARD"); - #endif - #ifdef WITH_TEST - PrintAndLog("TEST_WITH_TEST"); - #endif - bool showWaitCycles = false; - bool markCRCBytes = false; - bool loadFromFile = false; - bool saveToFile = false; - char param1 = '\0'; - char param2 = '\0'; - char param3 = '\0'; - char type[40] = {0}; - char filename[FILE_PATH_SIZE] = {0}; - uint8_t protocol = 0; - - // parse command line - int tlen = param_getstr(Cmd, 0, type, sizeof(type)); - if (param_getlength(Cmd, 1) == 1) { - param1 = param_getchar(Cmd, 1); - } else { - param_getstr(Cmd, 1, filename, sizeof(filename)); - } - if (param_getlength(Cmd, 2) == 1) { - param2 = param_getchar(Cmd, 2); - } else if (strlen(filename) == 0) { - param_getstr(Cmd, 2, filename, sizeof(filename)); - } - if (param_getlength(Cmd, 3) == 1) { - param3 = param_getchar(Cmd, 3); - } else if (strlen(filename) == 0) { - param_getstr(Cmd, 3, filename, sizeof(filename)); - } - - // Validate param1 - bool errors = false; - - if(tlen == 0) { - errors = true; - } - - if(param1 == 'h' - || (param1 != 0 && param1 != 'f' && param1 != 'c' && param1 != 'l') - || (param2 != 0 && param2 != 'f' && param2 != 'c' && param2 != 'l') - || (param3 != 0 && param3 != 'f' && param3 != 'c' && param3 != 'l')) { - errors = true; - } - - if(!errors) { - if(strcmp(type, "iclass") == 0) { - protocol = ICLASS; - } else if(strcmp(type, "mf") == 0) { - protocol = PROTO_MIFARE; - } else if(strcmp(type, "14a") == 0) { - protocol = ISO_14443A; - } else if(strcmp(type, "14b") == 0) { - protocol = ISO_14443B; - } else if(strcmp(type,"topaz") == 0) { - protocol = TOPAZ; - } else if(strcmp(type,"raw") == 0) { - protocol = -1; //No crc, no annotations - } else if (strcmp(type, "save") == 0) { - saveToFile = true; - } else { - errors = true; - } - } - - if (param1 == 'f' || param2 == 'f' || param3 == 'f') { - showWaitCycles = true; - } - - if (param1 == 'c' || param2 == 'c' || param3 == 'c') { - markCRCBytes = true; - } - - if (param1 == 'l' || param2 == 'l' || param3 == 'l') { - loadFromFile = true; - } - - if ((loadFromFile || saveToFile) && strlen(filename) == 0) { - errors = true; - } - - if (loadFromFile && saveToFile) { - errors = true; - } - - if (errors) { - PrintAndLog("List or save protocol data."); - PrintAndLog("Usage: hf list [f] [c] [l ]"); - PrintAndLog(" hf list save "); - PrintAndLog(" f - show frame delay times as well"); - PrintAndLog(" c - mark CRC bytes"); - PrintAndLog(" l - load data from file instead of trace buffer"); - PrintAndLog(" save - save data to file"); - PrintAndLog("Supported values:"); - PrintAndLog(" raw - just show raw data without annotations"); - PrintAndLog(" 14a - interpret data as iso14443a communications"); - PrintAndLog(" mf - interpret data as iso14443a communications and decrypt crypto1 stream"); - PrintAndLog(" 14b - interpret data as iso14443b communications"); - PrintAndLog(" iclass - interpret data as iclass communications"); - PrintAndLog(" topaz - interpret data as topaz communications"); - PrintAndLog(""); - PrintAndLog("example: hf list 14a f"); - PrintAndLog("example: hf list iclass"); - PrintAndLog("example: hf list save myCardTrace.trc"); - PrintAndLog("example: hf list 14a l myCardTrace.trc"); - return 0; - } - - - uint8_t *trace; - uint32_t tracepos = 0; - uint32_t traceLen = 0; - - if (loadFromFile) { - #define TRACE_CHUNK_SIZE (1<<16) // 64K to start with. Will be enough for BigBuf and some room for future extensions - FILE *tracefile = NULL; - size_t bytes_read; - trace = malloc(TRACE_CHUNK_SIZE); - if (trace == NULL) { - PrintAndLog("Cannot allocate memory for trace"); - return 2; - } - if ((tracefile = fopen(filename,"rb")) == NULL) { - PrintAndLog("Could not open file %s", filename); - free(trace); - return 0; - } - while (!feof(tracefile)) { - bytes_read = fread(trace+traceLen, 1, TRACE_CHUNK_SIZE, tracefile); - traceLen += bytes_read; - if (!feof(tracefile)) { - uint8_t *p = realloc(trace, traceLen + TRACE_CHUNK_SIZE); - if (p == NULL) { - PrintAndLog("Cannot allocate memory for trace"); - free(trace); - fclose(tracefile); - return 2; - } - trace = p; - } - } - fclose(tracefile); - } else { - trace = malloc(USB_CMD_DATA_SIZE); - // Query for the size of the trace - UsbCommand response; - GetFromBigBuf(trace, USB_CMD_DATA_SIZE, 0, &response, -1, false); - traceLen = response.arg[2]; - if (traceLen > USB_CMD_DATA_SIZE) { - uint8_t *p = realloc(trace, traceLen); - if (p == NULL) { - PrintAndLog("Cannot allocate memory for trace"); - free(trace); - return 2; - } - trace = p; - GetFromBigBuf(trace, traceLen, 0, NULL, -1, false); - } - } - - if (saveToFile) { - FILE *tracefile = NULL; - if ((tracefile = fopen(filename,"wb")) == NULL) { - PrintAndLog("Could not create file %s", filename); - return 1; - } - fwrite(trace, 1, traceLen, tracefile); - PrintAndLog("Recorded Activity (TraceLen = %d bytes) written to file %s", traceLen, filename); - fclose(tracefile); - } else { - PrintAndLog("Recorded Activity (TraceLen = %d bytes)", traceLen); - PrintAndLog(""); - PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer"); - PrintAndLog("iso14443a - All times are in carrier periods (1/13.56Mhz)"); - PrintAndLog("iClass - Timings are not as accurate"); - PrintAndLog(""); - PrintAndLog(" Start | End | Src | Data (! denotes parity error) | CRC | Annotation |"); - PrintAndLog("------------|------------|-----|-----------------------------------------------------------------|-----|--------------------|"); - - ClearAuthData(); - while(tracepos < traceLen) - { - tracepos = printTraceLine(tracepos, traceLen, trace, protocol, showWaitCycles, markCRCBytes); - } - } - - free(trace); - return 0; -} - int CmdHFSearch(const char *Cmd){ int ans = 0; PrintAndLog(""); @@ -557,7 +50,7 @@ int CmdHFSearch(const char *Cmd){ PrintAndLog("\nValid ISO14443A Tag Found - Quiting Search\n"); return ans; } - ans = HFiClassReader("", false, false); + ans = HFiClassReader(false, false); if (ans) { PrintAndLog("\nValid iClass Tag (or PicoPass Tag) Found - Quiting Search\n"); return ans; @@ -568,11 +61,16 @@ int CmdHFSearch(const char *Cmd){ return ans; } //14b is longest test currently (and rarest chip type) ... put last - ans = HF14BInfo(false); + ans = infoHF14B(false); if (ans) { PrintAndLog("\nValid ISO14443B Tag Found - Quiting Search\n"); return ans; } + ans = CmdLegicRFRead(""); + if (ans == 0) { + PrintAndLog("\nValid Legic Tag Found - Quiting Search\n"); + return ans; + } PrintAndLog("\nno known/supported 13.56 MHz tags found\n"); return 0; } @@ -585,32 +83,83 @@ int CmdHFSnoop(const char *Cmd) return 0; } -static command_t CommandTable[] = + +// static void InterpolateShannon(int *source, size_t source_len, int *dest, size_t dest_len) +// { + // int *buf = (int*)malloc(source_len * sizeof(int)); + // memcpy(buf, source, source_len * sizeof(int)); + // for (int i = 0; i < source_len; i++) { + // buf[i] += 128; + // } + // for (int i = 0; i < dest_len; i++) { + // float value = 0.0; + // for (int j = 0; j < source_len; j++) { + // if (i * source_len == j * dest_len) { // sin(0) / 0 = 1 + // value += (float)buf[j]; + // } else { + // value += (float)buf[j] * sin(((float)i*source_len/dest_len-j)*3.1415) / (((float)i*source_len/dest_len-j)*3.1415); + // } + // } + // dest[i] = value - 128; + // } + // free(buf); +// } + + +static int CmdHFPlot(const char *Cmd) +{ + CLIParserInit("hf plot", + "Plots HF signal after RF signal path and A/D conversion.", + "This can be used after any hf command and will show the last few milliseconds of the HF signal.\n" + "Note: If the last hf command terminated because of a timeout you will most probably see nothing.\n"); + void* argtable[] = { + arg_param_begin, + arg_param_end + }; + CLIExecWithReturn(Cmd, argtable, true); + + uint8_t buf[FPGA_TRACE_SIZE]; + + if (GetFromFpgaRAM(buf, FPGA_TRACE_SIZE)) { + for (size_t i = 0; i < FPGA_TRACE_SIZE; i++) { + GraphBuffer[i] = (int)buf[i] - 128; + } + GraphTraceLen = FPGA_TRACE_SIZE; + // InterpolateShannon(GraphBuffer, FPGA_TRACE_SIZE, GraphBuffer, FPGA_TRACE_SIZE*8/7); + // GraphTraceLen = FPGA_TRACE_SIZE*8/7; + ShowGraphWindow(); + RepaintGraphWindow(); + } + return 0; +} + + +static command_t CommandTable[] = { - {"help", CmdHelp, 1, "This help"}, - {"14a", CmdHF14A, 1, "{ ISO14443A RFIDs... }"}, - {"14b", CmdHF14B, 1, "{ ISO14443B RFIDs... }"}, - {"15", CmdHF15, 1, "{ ISO15693 RFIDs... }"}, - {"epa", CmdHFEPA, 1, "{ German Identification Card... }"}, - {"emv", CmdHFEMV, 1, "{ EMV cards... }"}, - {"legic", CmdHFLegic, 0, "{ LEGIC RFIDs... }"}, - {"iclass", CmdHFiClass, 1, "{ ICLASS RFIDs... }"}, - {"mf", CmdHFMF, 1, "{ MIFARE RFIDs... }"}, - {"mfu", CmdHFMFUltra, 1, "{ MIFARE Ultralight RFIDs... }"}, - {"mfp", CmdHFMFP, 1, "{ MIFARE Plus RFIDs... }"}, - {"topaz", CmdHFTopaz, 1, "{ TOPAZ (NFC Type 1) RFIDs... }"}, - {"fido", CmdHFFido, 1, "{ FIDO and FIDO2 authenticators... }"}, - {"tune", CmdHFTune, 0, "Continuously measure HF antenna tuning"}, - {"list", CmdHFList, 1, "List protocol data in trace buffer"}, - {"search", CmdHFSearch, 1, "Search for known HF tags [preliminary]"}, + {"help", CmdHelp, 1, "This help"}, + {"14a", CmdHF14A, 0, "{ ISO14443A RFIDs... }"}, + {"14b", CmdHF14B, 0, "{ ISO14443B RFIDs... }"}, + {"15", CmdHF15, 1, "{ ISO15693 RFIDs... }"}, + {"epa", CmdHFEPA, 0, "{ German Identification Card... }"}, + {"legic", CmdHFLegic, 0, "{ LEGIC RFIDs... }"}, + {"iclass", CmdHFiClass, 1, "{ ICLASS RFIDs... }"}, + {"mf", CmdHFMF, 1, "{ MIFARE RFIDs... }"}, + {"mfu", CmdHFMFUltra, 1, "{ MIFARE Ultralight RFIDs... }"}, + {"mfp", CmdHFMFP, 0, "{ MIFARE Plus RFIDs... }"}, + {"topaz", CmdHFTopaz, 0, "{ TOPAZ (NFC Type 1) RFIDs... }"}, + {"fido", CmdHFFido, 0, "{ FIDO and FIDO2 authenticators... }"}, + {"tune", CmdHFTune, 0, "Continuously measure HF antenna tuning"}, + {"list", CmdHFList, 1, "List protocol data in trace buffer"}, + {"plot", CmdHFPlot, 0, "Plot signal"}, + {"search", CmdHFSearch, 0, "Search for known HF tags [preliminary]"}, {"snoop", CmdHFSnoop, 0, " Generic HF Snoop"}, - {NULL, NULL, 0, NULL} + {NULL, NULL, 0, NULL} }; int CmdHF(const char *Cmd) { CmdsParse(CommandTable, Cmd); - return 0; + return 0; } int CmdHelp(const char *Cmd)