mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-17 11:58:13 +00:00
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (C) 2017 Saleem Rashid <trezor@saleemrashid.com>
|
|
*
|
|
* This library is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This library 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 Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <arpa/inet.h>
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/socket.h>
|
|
|
|
#define TREZOR_UDP_PORT 21324
|
|
|
|
struct usb_socket {
|
|
int fd;
|
|
struct sockaddr_in from;
|
|
socklen_t fromlen;
|
|
};
|
|
|
|
static struct usb_socket usb_main;
|
|
static struct usb_socket usb_debug;
|
|
|
|
static int socket_setup(int port) {
|
|
int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
|
|
if (fd < 0) {
|
|
perror("Failed to create socket");
|
|
exit(1);
|
|
}
|
|
|
|
struct sockaddr_in addr;
|
|
addr.sin_family = AF_INET;
|
|
addr.sin_port = htons(port);
|
|
addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
|
|
|
|
if (bind(fd, (struct sockaddr *)&addr, sizeof(addr)) != 0) {
|
|
perror("Failed to bind socket");
|
|
exit(1);
|
|
}
|
|
|
|
return fd;
|
|
}
|
|
|
|
static size_t socket_write(struct usb_socket *sock, const void *buffer,
|
|
size_t size) {
|
|
if (sock->fromlen > 0) {
|
|
ssize_t n = sendto(sock->fd, buffer, size, MSG_DONTWAIT,
|
|
(const struct sockaddr *)&sock->from, sock->fromlen);
|
|
if (n < 0 || ((size_t)n) != size) {
|
|
perror("Failed to write socket");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
static size_t socket_read(struct usb_socket *sock, void *buffer, size_t size) {
|
|
sock->fromlen = sizeof(sock->from);
|
|
ssize_t n = recvfrom(sock->fd, buffer, size, MSG_DONTWAIT,
|
|
(struct sockaddr *)&sock->from, &sock->fromlen);
|
|
|
|
if (n < 0) {
|
|
if (errno != EAGAIN && errno != EWOULDBLOCK) {
|
|
perror("Failed to read socket");
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const char msg_ping[] = {'P', 'I', 'N', 'G', 'P', 'I', 'N', 'G'};
|
|
static const char msg_pong[] = {'P', 'O', 'N', 'G', 'P', 'O', 'N', 'G'};
|
|
|
|
if (n == sizeof(msg_ping) &&
|
|
memcmp(buffer, msg_ping, sizeof(msg_ping)) == 0) {
|
|
socket_write(sock, msg_pong, sizeof(msg_pong));
|
|
return 0;
|
|
}
|
|
|
|
return n;
|
|
}
|
|
|
|
void emulatorSocketInit(void) {
|
|
usb_main.fd = socket_setup(TREZOR_UDP_PORT);
|
|
usb_main.fromlen = 0;
|
|
usb_debug.fd = socket_setup(TREZOR_UDP_PORT + 1);
|
|
usb_debug.fromlen = 0;
|
|
}
|
|
|
|
size_t emulatorSocketRead(int *iface, void *buffer, size_t size) {
|
|
size_t n = socket_read(&usb_main, buffer, size);
|
|
if (n > 0) {
|
|
*iface = 0;
|
|
return n;
|
|
}
|
|
|
|
n = socket_read(&usb_debug, buffer, size);
|
|
if (n > 0) {
|
|
*iface = 1;
|
|
return n;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t emulatorSocketWrite(int iface, const void *buffer, size_t size) {
|
|
if (iface == 0) {
|
|
return socket_write(&usb_main, buffer, size);
|
|
}
|
|
if (iface == 1) {
|
|
return socket_write(&usb_debug, buffer, size);
|
|
}
|
|
return 0;
|
|
}
|