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trezor-firmware/legacy/firmware/udp.c

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/*
* This file is part of the Trezor project, https://trezor.io/
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*
* 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 <stdint.h>
#include <unistd.h>
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#include "usb.h"
#include "debug.h"
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#include "messages.h"
#include "timer.h"
static volatile char tiny = 0;
void usbInit(void) { emulatorSocketInit(); }
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#if DEBUG_LINK
#define _ISDBG (((iface == 1) ? 'd' : 'n'))
#else
#define _ISDBG ('n')
#endif
void waitAndProcessUSBRequests(uint32_t millis) {
emulatorPoll();
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static uint8_t buffer[USB_PACKET_SIZE];
int iface = 0;
if (emulatorSocketRead(&iface, buffer, sizeof(buffer), millis) > 0) {
if (!tiny) {
do {
msg_read_common(_ISDBG, buffer, sizeof(buffer));
} while (emulatorSocketRead(&iface, buffer, sizeof(buffer), 0) > 0);
} else {
msg_read_tiny(buffer, sizeof(buffer));
}
}
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const uint8_t *data;
while ((data = msg_out_data()) != NULL) {
emulatorSocketWrite(0, data, USB_PACKET_SIZE);
}
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#if DEBUG_LINK
while ((data = msg_debug_out_data()) != NULL) {
emulatorSocketWrite(1, data, USB_PACKET_SIZE);
}
#endif
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}
void usbPoll(void) { waitAndProcessUSBRequests(0); }
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char usbTiny(char set) {
char old = tiny;
tiny = set;
return old;
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}
void usbFlush(uint32_t millis) {
const uint8_t *data;
while ((data = msg_out_data()) != NULL) {
emulatorSocketWrite(0, data, USB_PACKET_SIZE);
}
usleep(millis * 1000);
}