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Make emulator CCID connectivity optional

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Allow HID emulation without a vpcd listener and provide an explicit CCID opt-out for isolated tests.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>
This commit is contained in:
Pol Henarejos
2026-07-26 20:07:55 +02:00
parent e3ade9854d
commit 9e39374f42
1 changed files with 44 additions and 31 deletions
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src/usb/emulation/emulation.c
+44 -31
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@@ -52,8 +52,10 @@ typedef int socklen_t;
#include "ccid/ccid.h"
#include "hid/ctap_hid.h"
socket_t ccid_sock = 0;
socket_t hid_server_sock = 0;
#define PICOKEYS_EMULATION_DISABLE_CCID_ENV "PICOKEYS_EMULATION_DISABLE_CCID"
socket_t ccid_sock = INVALID_SOCKET;
socket_t hid_server_sock = INVALID_SOCKET;
socket_t hid_client_sock = INVALID_SOCKET;
extern uint8_t thread_type;
extern const uint8_t *cbor_data;
@@ -96,7 +98,6 @@ static int msleep(long msec) {
#endif
int emul_init(const char *host, uint16_t port) {
struct sockaddr_in serv_addr;
fprintf(stderr, "\n Starting emulation envionrment\n");
#ifdef _MSC_VER
WSADATA wsaData;
@@ -104,37 +105,43 @@ int emul_init(const char *host, uint16_t port) {
printf("winsock initialization failure\n");
}
#endif
if ((ccid_sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
log_sock_error("socket(ccid)");
return -1;
}
#ifdef USB_ITF_CCID
if (!getenv(PICOKEYS_EMULATION_DISABLE_CCID_ENV)) {
struct sockaddr_in serv_addr;
if ((ccid_sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
log_sock_error("socket(ccid)");
}
else {
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(port);
serv_addr.sin_family = AF_INET;
serv_addr.sin_port = htons(port);
// Convert IPv4 and IPv6 addresses from text to binary
// form
if (inet_pton(AF_INET, host, &serv_addr.sin_addr) <= 0) {
log_sock_error("inet_pton(ccid)");
close(ccid_sock);
return -1;
}
if (connect(ccid_sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
log_sock_error("connect(ccid)");
close(ccid_sock);
return -1;
}
// Convert IPv4 and IPv6 addresses from text to binary
// form
if (inet_pton(AF_INET, host, &serv_addr.sin_addr) <= 0) {
log_sock_error("inet_pton(ccid)");
close(ccid_sock);
ccid_sock = INVALID_SOCKET;
}
else if (connect(ccid_sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
log_sock_error("connect(ccid)");
close(ccid_sock);
ccid_sock = INVALID_SOCKET;
}
}
if (ccid_sock != INVALID_SOCKET) {
#ifdef _MSC_VER
unsigned long on = 1;
if (0 != ioctlsocket(ccid_sock, FIONBIO, &on)) {
perror("ioctlsocket FIONBIO");
}
unsigned long on = 1;
if (0 != ioctlsocket(ccid_sock, FIONBIO, &on)) {
perror("ioctlsocket FIONBIO");
}
#else
int x = fcntl(ccid_sock, F_GETFL, 0);
fcntl(ccid_sock, F_SETFL, x | O_NONBLOCK);
int flag = 1;
setsockopt(ccid_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(int));
int x = fcntl(ccid_sock, F_GETFL, 0);
fcntl(ccid_sock, F_SETFL, x | O_NONBLOCK);
int flag = 1;
setsockopt(ccid_sock, IPPROTO_TCP, TCP_NODELAY, (char *)&flag, sizeof(int));
#endif
}
}
#endif
// HID server
@@ -215,6 +222,9 @@ bool tud_hid_n_report(uint8_t itf, uint8_t report_id, const uint8_t *buffer, uin
uint16_t driver_write_emul(uint8_t itf, const uint8_t *buffer, uint16_t buffer_size) {
uint16_t size = htons(buffer_size);
socket_t sock = get_sock_itf(itf);
if (sock == INVALID_SOCKET) {
return 0;
}
// DEBUG_PAYLOAD(buffer,buffer_size);
#ifdef _WIN32
int ret = 0;
@@ -286,6 +296,9 @@ uint16_t emul_read(uint8_t itf) {
}
#endif
socket_t sock = get_sock_itf(itf);
if (sock == INVALID_SOCKET) {
return 0;
}
//printf("get_sockt itf %d - %d\n", itf, sock);
uint16_t len = 0;
fd_set input;