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/* Copyright (C) 2018 Curtis McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sysexits.h>
#include <termios.h>
#include <unistd.h>
static int tty = -1;
static void ttyWrite(const uint8_t *ptr, size_t size) {
ssize_t ret = write(tty, ptr, size);
if (ret < 0) err(EX_IOERR, "write");
}
static void ttyRead(uint8_t *ptr, size_t size) {
while (size) {
ssize_t ret = read(tty, ptr, size);
if (ret < 0) err(EX_IOERR, "read");
ptr += ret;
size -= ret;
}
}
static void reset(void) {
uint8_t buf[] = { 0x1B, 'a' };
ttyWrite(buf, 2);
}
static void test(void) {
uint8_t buf[3] = { 0x1B, 'e' };
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] != 'y') errx(EX_PROTOCOL, "test fail %hhX", buf[1]);
buf[1] = 0x87;
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] != '0') errx(EX_PROTOCOL, "ram fail %hhX", buf[1]);
buf[1] = 't';
ttyWrite(buf, 2);
ttyRead(buf, 3);
printf("model: %c%c\n", buf[1], buf[2]);
buf[1] = 'v';
ttyWrite(buf, 2);
ttyRead(buf, 2);
printf("firmware: %hhu\n", buf[1]);
}
static void sensorTest(void) {
uint8_t buf[] = { 0x1B, 0x86 };
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] != '0') errx(EX_PROTOCOL, "sensor fail %hhX", buf[1]);
}
static char led;
static void setLed(void) {
uint8_t buf[2] = { 0x1B };
switch (led) {
break; case 'a': buf[1] = 0x82;
break; case 'g': buf[1] = 0x83;
break; case 'y': buf[1] = 0x84;
break; case 'r': buf[1] = 0x85;
break; default: buf[1] = 0x81;
}
ttyWrite(buf, 2);
}
static void status(void) {
uint8_t buf[2];
ttyRead(buf, 2);
switch (buf[1]) {
break; case '0': return;
break; case '1': errx(EX_DATAERR, "read/write error");
break; case '2': errx(EX_DATAERR, "command format error");
break; case '4': errx(EX_DATAERR, "invalid command");
break; case '9': errx(EX_DATAERR, "invalid card swipe");
break; default: errx(EX_PROTOCOL, "status fail %hhX", buf[1]);
}
}
static void readCard(void) {
uint8_t buf[] = { 0x1B, 'r' };
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] != 's') errx(EX_PROTOCOL, "read fail %hhX", buf[1]);
for (;;) {
ttyRead(buf, 1);
if (buf[0] == '?') {
ttyRead(buf, 1);
if (buf[0] == 0x1C) break;
printf("?");
} else {
printf("%c", buf[0]);
}
}
status();
}
static void writeCard(void) {
uint8_t buf[] = { 0x1B, 'w', 0x1B, 's' };
ttyWrite(buf, 4);
ssize_t size;
while (0 < (size = read(STDIN_FILENO, buf, 1))) {
ttyWrite(buf, 1);
}
if (size < 0) err(EX_IOERR, "(stdin)");
buf[0] = '?';
buf[1] = 0x1C;
ttyWrite(buf, 2);
status();
}
static char erase;
static void eraseCard(void) {
uint8_t buf[] = { 0x1B, 'c', erase - '0' };
ttyWrite(buf, 3);
ttyRead(buf, 2);
if (buf[1] != '0') errx(EX_DATAERR, "erase fail %hhX", buf[1]);
}
static void setHiCo(void) {
uint8_t buf[] = { 0x1B, 'x' };
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] != '0') errx(EX_PROTOCOL, "hi-co fail %hhX", buf[1]);
}
static void setLoCo(void) {
uint8_t buf[] = { 0x1B, 'y' };
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] != '0') errx(EX_PROTOCOL, "lo-co fail %hhX", buf[1]);
}
static void getCo(void) {
uint8_t buf[] = { 0x1B, 'd' };
ttyWrite(buf, 2);
ttyRead(buf, 2);
if (buf[1] == 'h') printf("hi-co\n");
else if (buf[1] == 'l') printf("lo-co\n");
else errx(EX_PROTOCOL, "get co fail %hhX", buf[1]);
}
int main(int argc, char *argv[]) {
const char *file = "/dev/ttyUSB0";
void (*func)(void) = test;
int opt;
while (0 < (opt = getopt(argc, argv, "L:RTce:f:hlrtw"))) {
switch (opt) {
break; case 'L': led = optarg[0]; func = setLed;
break; case 'R': func = reset;
break; case 'T': func = sensorTest;
break; case 'c': func = getCo;
break; case 'e': erase = optarg[0]; func = eraseCard;
break; case 'f': file = optarg;
break; case 'h': func = setHiCo;
break; case 'l': func = setLoCo;
break; case 'r': func = readCard;
break; case 't': func = test;
break; case 'w': func = writeCard;
break; default: return EX_USAGE;
}
}
tty = open(file, O_RDWR);
if (tty < 0) err(EX_NOINPUT, "%s", file);
struct termios attr;
int error = tcgetattr(tty, &attr);
if (error) err(EX_IOERR, "tcgetattr");
cfmakeraw(&attr);
error = tcsetattr(tty, TCSANOW, &attr);
if (error) err(EX_IOERR, "tcsetattr");
func();
}
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