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trezor-core
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unix: start udp port for each active hid/webusb interface

This commit is contained in:
Pavol Rusnak 2018-02-01 14:22:24 +01:00
parent db71afca60
commit 1e03a5d554
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GPG Key ID: 91F3B339B9A02A3D
1 changed files with 89 additions and 82 deletions
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171
embed/unix/usb.c
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@ -24,45 +24,59 @@ void __attribute__((noreturn)) __fatal_error(const char *expr, const char *msg,
// and emulates HID/WebUSB interface TREZOR_UDP_IFACE
// gracefully ignores all other USB interfaces
#define TREZOR_UDP_IFACE 0
#define TREZOR_UDP_PORT 21324
#define USBD_MAX_NUM_INTERFACES 8
#define TREZOR_UDP_PORT 21324
static usb_iface_type_t emulator_usb_iface_type = USB_IFACE_TYPE_DISABLED;
static int sock = -1;
static struct sockaddr_in si_me, si_other;
static socklen_t slen = 0;
static struct {
usb_iface_type_t type;
int sock;
struct sockaddr_in si_me, si_other;
socklen_t slen;
} usb_ifaces[USBD_MAX_NUM_INTERFACES];
void usb_init(const usb_dev_info_t *dev_info) {
(void)dev_info;
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
usb_ifaces[i].type = USB_IFACE_TYPE_DISABLED;
usb_ifaces[i].sock = -1;
memset(&usb_ifaces[i].si_me, 0, sizeof(struct sockaddr_in));
memset(&usb_ifaces[i].si_other, 0, sizeof(struct sockaddr_in));
usb_ifaces[i].slen = 0;
}
}
void usb_deinit(void) {
}
void usb_start(void) {
// start server only if interface 0 is either HID or WebUSB
if (emulator_usb_iface_type == USB_IFACE_TYPE_HID || emulator_usb_iface_type == USB_IFACE_TYPE_WEBUSB) {
sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
ensure(sectrue * (sock >= 0), NULL);
const char *ip = getenv("TREZOR_UDP_IP");
const char *port = getenv("TREZOR_UDP_PORT");
fcntl(sock, F_SETFL, O_NONBLOCK);
// iterate interfaces
for (int i = 0; i < USBD_MAX_NUM_INTERFACES; i++) {
// skip if not HID or WebUSB interface
if (usb_ifaces[i].type != USB_IFACE_TYPE_HID && usb_ifaces[i].type != USB_IFACE_TYPE_WEBUSB) {
continue;
}
si_me.sin_family = AF_INET;
const char *ip = getenv("TREZOR_UDP_IP");
usb_ifaces[i].sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
ensure(sectrue * (usb_ifaces[i].sock >= 0), NULL);
fcntl(usb_ifaces[i].sock, F_SETFL, O_NONBLOCK);
usb_ifaces[i].si_me.sin_family = AF_INET;
if (ip) {
si_me.sin_addr.s_addr = inet_addr(ip);
usb_ifaces[i].si_me.sin_addr.s_addr = inet_addr(ip);
} else {
si_me.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
usb_ifaces[i].si_me.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
}
const char *port = getenv("TREZOR_UDP_PORT");
if (port) {
si_me.sin_port = htons(atoi(port));
usb_ifaces[i].si_me.sin_port = htons(atoi(port) + i);
} else {
si_me.sin_port = htons(TREZOR_UDP_PORT);
usb_ifaces[i].si_me.sin_port = htons(TREZOR_UDP_PORT + i);
}
ensure(sectrue * (0 == bind(sock, (struct sockaddr*)&si_me, sizeof(si_me))), NULL);
ensure(sectrue * (0 == bind(usb_ifaces[i].sock, (struct sockaddr*)&usb_ifaces[i].si_me, sizeof(struct sockaddr_in))), NULL);
}
}
@ -70,121 +84,114 @@ void usb_stop(void) {
}
secbool usb_hid_add(const usb_hid_info_t *info) {
// store iface type if it is the emulated iface
if (info->iface_num == TREZOR_UDP_IFACE) {
emulator_usb_iface_type = USB_IFACE_TYPE_HID;
if (info->iface_num < USBD_MAX_NUM_INTERFACES && usb_ifaces[info->iface_num].type == USB_IFACE_TYPE_DISABLED) {
usb_ifaces[info->iface_num].type = USB_IFACE_TYPE_HID;
}
return sectrue;
}
secbool usb_webusb_add(const usb_webusb_info_t *info) {
// store iface type if it is the emulated iface
if (info->iface_num == TREZOR_UDP_IFACE) {
emulator_usb_iface_type = USB_IFACE_TYPE_WEBUSB;
if (info->iface_num < USBD_MAX_NUM_INTERFACES && usb_ifaces[info->iface_num].type == USB_IFACE_TYPE_DISABLED) {
usb_ifaces[info->iface_num].type = USB_IFACE_TYPE_WEBUSB;
}
return sectrue;
}
secbool usb_vcp_add(const usb_vcp_info_t *info) {
if (info->iface_num < USBD_MAX_NUM_INTERFACES && usb_ifaces[info->iface_num].type == USB_IFACE_TYPE_DISABLED) {
usb_ifaces[info->iface_num].type = USB_IFACE_TYPE_VCP;
}
return sectrue;
}
static secbool usb_emulated_can_read(uint8_t iface_num) {
static secbool usb_emulated_poll(uint8_t iface_num, short dir) {
struct pollfd fds[] = {
{ sock, POLLIN, 0 },
{ usb_ifaces[iface_num].sock, dir, 0 },
};
int r = poll(fds, 1, 0);
return sectrue * (r > 0);
}
secbool usb_hid_can_read(uint8_t iface_num) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_HID) {
return secfalse;
}
return usb_emulated_can_read(iface_num);
}
secbool usb_webusb_can_read(uint8_t iface_num) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_WEBUSB) {
return secfalse;
}
return usb_emulated_can_read(iface_num);
}
static secbool usb_emulated_can_write(uint8_t iface_num) {
struct pollfd fds[] = {
{ sock, POLLOUT, 0 },
};
int r = poll(fds, 1, 0);
return sectrue * (r > 0);
}
secbool usb_hid_can_write(uint8_t iface_num) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_HID) {
return secfalse;
}
return usb_emulated_can_write(iface_num);
}
secbool usb_webusb_can_write(uint8_t iface_num) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_WEBUSB) {
return secfalse;
}
return usb_emulated_can_write(iface_num);
}
static int usb_emulated_read(uint8_t iface_num, uint8_t *buf, uint32_t len) {
struct sockaddr_in si;
socklen_t sl = sizeof(si);
ssize_t r = recvfrom(sock, buf, len, MSG_DONTWAIT, (struct sockaddr *)&si, &sl);
ssize_t r = recvfrom(usb_ifaces[iface_num].sock, buf, len, MSG_DONTWAIT, (struct sockaddr *)&si, &sl);
if (r < 0) {
return r;
}
si_other = si;
slen = sl;
usb_ifaces[iface_num].si_other = si;
usb_ifaces[iface_num].slen = sl;
static const char *ping_req = "PINGPING";
static const char *ping_resp = "PONGPONG";
if (r == strlen(ping_req) && 0 == memcmp(ping_req, buf, strlen(ping_req))) {
if (slen > 0) {
sendto(sock, ping_resp, strlen(ping_resp), MSG_DONTWAIT, (const struct sockaddr *)&si_other, slen);
if (usb_ifaces[iface_num].slen > 0) {
sendto(usb_ifaces[iface_num].sock, ping_resp, strlen(ping_resp), MSG_DONTWAIT, (const struct sockaddr *)&usb_ifaces[iface_num].si_other, usb_ifaces[iface_num].slen);
}
return 0;
}
return r;
}
static int usb_emulated_write(uint8_t iface_num, const uint8_t *buf, uint32_t len)
{
ssize_t r = len;
if (usb_ifaces[iface_num].slen > 0) {
r = sendto(usb_ifaces[iface_num].sock, buf, len, MSG_DONTWAIT, (const struct sockaddr *)&usb_ifaces[iface_num].si_other, usb_ifaces[iface_num].slen);
}
return r;
}
secbool usb_hid_can_read(uint8_t iface_num) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_HID) {
return secfalse;
}
return usb_emulated_poll(iface_num, POLLIN);
}
secbool usb_webusb_can_read(uint8_t iface_num) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_WEBUSB) {
return secfalse;
}
return usb_emulated_poll(iface_num, POLLIN);
}
secbool usb_hid_can_write(uint8_t iface_num) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_HID) {
return secfalse;
}
return usb_emulated_poll(iface_num, POLLOUT);
}
secbool usb_webusb_can_write(uint8_t iface_num) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_WEBUSB) {
return secfalse;
}
return usb_emulated_poll(iface_num, POLLOUT);
}
int usb_hid_read(uint8_t iface_num, uint8_t *buf, uint32_t len) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_HID) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_HID) {
return 0;
}
return usb_emulated_read(iface_num, buf, len);
}
int usb_webusb_read(uint8_t iface_num, uint8_t *buf, uint32_t len) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_WEBUSB) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_WEBUSB) {
return 0;
}
return usb_emulated_read(iface_num, buf, len);
}
static int usb_emulated_write(uint8_t iface_num, const uint8_t *buf, uint32_t len)
{
ssize_t r = len;
if (slen > 0) {
r = sendto(sock, buf, len, MSG_DONTWAIT, (const struct sockaddr *)&si_other, slen);
}
return r;
}
int usb_hid_write(uint8_t iface_num, const uint8_t *buf, uint32_t len) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_HID) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_HID) {
return 0;
}
return usb_emulated_write(iface_num, buf, len);
}
int usb_webusb_write(uint8_t iface_num, const uint8_t *buf, uint32_t len) {
if (iface_num != TREZOR_UDP_IFACE || emulator_usb_iface_type != USB_IFACE_TYPE_WEBUSB) {
if (iface_num >= USBD_MAX_NUM_INTERFACES || usb_ifaces[iface_num].type != USB_IFACE_TYPE_WEBUSB) {
return 0;
}
return usb_emulated_write(iface_num, buf, len);