mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-21 05:48:23 +00:00
105 lines
2.6 KiB
C
105 lines
2.6 KiB
C
/*
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* This file is part of the Trezor project, https://trezor.io/
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*
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* Copyright (c) SatoshiLabs
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "hidapi.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <arpa/inet.h>
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int hid_init(void) {
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return 0;
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}
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int hid_exit(void) {
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return 0;
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}
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hid_device *hid_open_path(const char *path) {
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int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
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if (fd < 0) {
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fprintf(stderr, "Failed to create socket\n");
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return NULL;
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}
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hid_device *d = malloc(sizeof(hid_device));
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memset(d, 0, sizeof(hid_device));
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d->fd = fd;
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d->other.sin_family = AF_INET;
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d->other.sin_port = htons(atoi(path));
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d->other.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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d->slen = sizeof(d->other);
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return d;
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}
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void hid_close(hid_device *device) {
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if (device && device->fd) {
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close(device->fd);
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}
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if (device) {
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free(device);
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}
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}
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int hid_write(hid_device *device, const unsigned char *data, size_t length) {
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if (!device) {
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fprintf(stderr, "Device can't be NULL\n");
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return -1;
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}
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if (length != 65) {
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fprintf(stderr, "Invalid packet size\n");
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return -1;
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}
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ssize_t n = sendto(device->fd, data + 1, length - 1, 0, (const struct sockaddr *)&(device->other), device->slen);
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if (n < 0 || ((size_t)n) != length - 1) {
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fprintf(stderr, "Failed to write socket\n");
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return -1;
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}
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usleep(1500);
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return length;
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}
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int hid_read_timeout(hid_device *device, unsigned char *data, size_t length, int milliseconds) {
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if (!device) {
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fprintf(stderr, "Device can't be NULL\n");
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return -1;
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}
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for (int i = 0; i < milliseconds; i++) {
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usleep(1500);
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ssize_t n = recvfrom(device->fd, data, length, MSG_DONTWAIT, (struct sockaddr *)&(device->other), &(device->slen));
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if (n < 0) {
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if (errno == EAGAIN && errno == EWOULDBLOCK) { // timeout tick
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continue;
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} else {
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fprintf(stderr, "Failed to read socket\n");
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return -1;
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}
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} else {
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return n;
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}
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}
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return 0;
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}
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