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-rw-r--r--input.c203
-rw-r--r--input.h31
-rw-r--r--main.c38
-rw-r--r--window.c5
-rw-r--r--window.h1
5 files changed, 273 insertions, 5 deletions
diff --git a/input.c b/input.c
new file mode 100644
index 0000000..9733236
--- /dev/null
+++ b/input.c
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2023 Mikhail Burakov. This file is part of receiver.
+ *
+ * receiver is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * receiver 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with receiver. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "input.h"
+
+#include <errno.h>
+#include <linux/uhid.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "toolbox/utils.h"
+
+static const uint8_t evdev_to_hid[] = {
+#define NOOP 0x00
+ /* 0x00 */ NOOP, 0x29, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
+ /* 0x08 */ 0x24, 0x25, 0x26, 0x27, 0x2d, 0x2e, 0x2a, 0x2b,
+ /* 0x10 */ 0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c,
+ /* 0x18 */ 0x12, 0x13, 0x2f, 0x30, 0x28, 0xe0, 0x04, 0x16,
+ /* 0x20 */ 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f, 0x33,
+ /* 0x28 */ 0x34, 0x35, 0xe1, 0x31, 0x1d, 0x1b, 0x06, 0x19,
+ /* 0x30 */ 0x05, 0x11, 0x10, 0x36, 0x37, 0x38, 0xe5, 0x55,
+ /* 0x38 */ 0xe2, 0x2c, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e,
+ /* 0x40 */ 0x3f, 0x40, 0x41, 0x42, 0x43, 0x53, 0x47, 0x5f,
+ /* 0x48 */ 0x60, 0x61, 0x56, 0x5c, 0x5d, 0x5e, 0x57, 0x59,
+ /* 0x50 */ 0x5a, 0x5b, 0x62, 0x63, NOOP, 0x94, 0x64, 0x44,
+ /* 0x58 */ 0x45, 0x87, 0x92, 0x93, 0x8a, 0x88, 0x8b, NOOP,
+ /* 0x60 */ 0x58, 0xe4, 0x54, 0x46, 0xe6, NOOP, 0x4a, 0x52,
+ /* 0x68 */ 0x4b, 0x50, 0x4f, 0x4d, 0x51, 0x4e, 0x49, 0x4c,
+ /* 0x70 */ NOOP, 0x7f, 0x81, 0x80, 0x66, 0x67, 0xd7, 0x48,
+ /* 0x78 */ NOOP, 0x85, 0x90, 0x91, 0x89, 0xe3, 0xe7, 0x65,
+ /* 0x80 */ NOOP, 0x79, NOOP, 0x7a, 0x77, 0x7c, 0x74, 0x7d,
+ /* 0x88 */ 0x7e, 0x7b, 0x75, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0x90 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0x98 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xa0 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xa8 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xb0 */ NOOP, NOOP, NOOP, 0xb6, 0xb7, NOOP, NOOP, 0x68,
+ /* 0xb8 */ 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
+ /* 0xc0 */ 0x71, 0x72, 0x73, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xc8 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xd0 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xd8 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xe0 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xe8 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xf0 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+ /* 0xf8 */ NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP, NOOP,
+#undef NOOP
+};
+
+static const struct uhid_event uhid_event_create2 = {
+ .type = UHID_CREATE2,
+ .u.create2.name = "Virtual input device",
+ .u.create2.bus = BUS_USB,
+ .u.create2.rd_size = 108,
+ .u.create2.rd_data =
+ {
+ 0x05, 0x01, 0x09, 0x06, 0xa1, 0x01, 0x85, 0x01, 0x05, 0x07, 0x19,
+ 0xe0, 0x29, 0xe7, 0x15, 0x00, 0x25, 0x01, 0x75, 0x01, 0x95, 0x08,
+ 0x81, 0x02, 0x95, 0x06, 0x75, 0x08, 0x15, 0x00, 0x26, 0xdd, 0x00,
+ 0x05, 0x07, 0x19, 0x00, 0x29, 0xdd, 0x81, 0x00, 0xc0, 0x05, 0x01,
+ 0x09, 0x02, 0xa1, 0x01, 0x85, 0x02, 0x09, 0x01, 0xa1, 0x00, 0x05,
+ 0x09, 0x19, 0x01, 0x29, 0x05, 0x15, 0x00, 0x25, 0x01, 0x95, 0x05,
+ 0x75, 0x01, 0x81, 0x02, 0x95, 0x01, 0x75, 0x03, 0x81, 0x01, 0x05,
+ 0x01, 0x09, 0x30, 0x09, 0x31, 0x16, 0x01, 0x80, 0x26, 0xff, 0x7f,
+ 0x75, 0x10, 0x95, 0x02, 0x81, 0x06, 0x09, 0x38, 0x15, 0x81, 0x25,
+ 0x7f, 0x75, 0x08, 0x95, 0x01, 0x81, 0x06, 0xc0, 0xc0,
+ },
+};
+
+struct InputStream {
+ int fd;
+ uint64_t key_state[4];
+};
+
+static bool Drain(int fd, const void* data, size_t size) {
+ for (const uint8_t* ptr = data; size;) {
+ ssize_t result = write(fd, ptr, size);
+ if (result > 0) {
+ ptr += result;
+ size -= (size_t)result;
+ continue;
+ }
+ if (errno != EINTR) {
+ LOG("Failed to write data (%s)", strerror(errno));
+ return false;
+ }
+ }
+ return true;
+}
+
+struct InputStream* InputStreamCreate(int fd) {
+ struct InputStream* input_stream = malloc(sizeof(struct InputStream));
+ if (!input_stream) {
+ LOG("Failed to allocate input stream (%s)", strerror(errno));
+ return NULL;
+ }
+ *input_stream = (struct InputStream){
+ .fd = fd,
+ };
+
+ size_t size = offsetof(struct uhid_event, u.create2.rd_data) +
+ uhid_event_create2.u.create2.rd_size;
+ if (!Drain(fd, &uhid_event_create2, size)) {
+ LOG("Failed to drain create2 event");
+ goto rollback_input_stream;
+ }
+ return input_stream;
+
+rollback_input_stream:
+ free(input_stream);
+ return NULL;
+}
+
+static void RecordKeyCode(struct uhid_input2_req* input2, uint8_t code) {
+ if (!code) return;
+ if (input2->size == 1) {
+ input2->data[1] = 0;
+ input2->size = 2;
+ }
+ if (code >= 0xe0) {
+ uint8_t shift = code - 0xe0;
+ input2->data[1] |= 1 << shift;
+ } else if (input2->size < 8) {
+ input2->data[input2->size] = code;
+ input2->size++;
+ }
+}
+
+static size_t InputStreamFormatKeyboard(const struct InputStream* input_stream,
+ struct uhid_event* uhid_event) {
+ uhid_event->type = UHID_INPUT2;
+ uhid_event->u.input2.data[0] = 1;
+ uhid_event->u.input2.size = 1;
+ size_t code_counter = 0;
+ for (size_t row = 0; row < LENGTH(input_stream->key_state); row++) {
+ for (uint64_t shift = 0; shift < sizeof(uint64_t) * 8; shift++) {
+ if (input_stream->key_state[row] & (1ull << shift))
+ RecordKeyCode(&uhid_event->u.input2, evdev_to_hid[code_counter]);
+ code_counter++;
+ }
+ }
+
+ // TODO(mburakov): Remove this?
+ memset(uhid_event->u.input2.data + uhid_event->u.input2.size, 0,
+ 8 - uhid_event->u.input2.size);
+ uhid_event->u.input2.size = 8;
+
+ return offsetof(struct uhid_event, u.input2.data) + uhid_event->u.input2.size;
+}
+
+bool InputStreamKeyPress(struct InputStream* input_stream, unsigned evdev_code,
+ bool pressed) {
+ size_t key_state_row = evdev_code >> 6 & 0x3;
+ uint64_t key_state_shift = evdev_code & 0x3f;
+ uint64_t key_state =
+ (input_stream->key_state[key_state_row] & ~(1ull << key_state_shift)) |
+ ((uint64_t)(!!pressed) << key_state_shift);
+ if (key_state == input_stream->key_state[key_state_row]) return true;
+ input_stream->key_state[key_state_row] = key_state;
+
+ struct uhid_event uhid_event_input2;
+ size_t size = InputStreamFormatKeyboard(input_stream, &uhid_event_input2);
+ bool result = Drain(input_stream->fd, &uhid_event_input2, size);
+ if (!result) LOG("Failed to drain keypress");
+ return result;
+}
+
+bool InputStreamHandsoff(struct InputStream* input_stream) {
+ memset(input_stream->key_state, 0, sizeof(input_stream->key_state));
+ static const struct uhid_event uhid_event_input2 = {
+ .type = UHID_INPUT2,
+ };
+ bool result = Drain(input_stream->fd, &uhid_event_input2,
+ sizeof(uhid_event_input2.type));
+ if (!result) LOG("Failed to drain handsoff");
+ return result;
+}
+
+void InputStreamDestroy(struct InputStream* input_stream) {
+ static const struct uhid_event uhid_event_destroy = {
+ .type = UHID_DESTROY,
+ };
+ Drain(input_stream->fd, &uhid_event_destroy, sizeof(uhid_event_destroy.type));
+ free(input_stream);
+}
diff --git a/input.h b/input.h
new file mode 100644
index 0000000..1487b35
--- /dev/null
+++ b/input.h
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2023 Mikhail Burakov. This file is part of receiver.
+ *
+ * receiver is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * receiver 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with receiver. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef RECEIVER_INPUT_H_
+#define RECEIVER_INPUT_H_
+
+#include <stdbool.h>
+
+struct InputStream;
+
+struct InputStream* InputStreamCreate(int fd);
+bool InputStreamKeyPress(struct InputStream* input_stream, unsigned evdev_code,
+ bool pressed);
+bool InputStreamHandsoff(struct InputStream* input_stream);
+void InputStreamDestroy(struct InputStream* input_stream);
+
+#endif // RECEIVER_INPUT_H_
diff --git a/main.c b/main.c
index ec05612..cce66ae 100644
--- a/main.c
+++ b/main.c
@@ -29,6 +29,7 @@
#include <unistd.h>
#include "decode.h"
+#include "input.h"
#include "toolbox/utils.h"
#include "window.h"
@@ -82,8 +83,25 @@ static void OnWindowClose(void* user) {
g_signal = SIGINT;
}
+static void OnWindowFocus(void* user, bool focused) {
+ if (focused) return;
+ if (!InputStreamHandsoff(user)) {
+ LOG("Failed to handle window focus");
+ g_signal = SIGABRT;
+ }
+}
+
static void OnWindowKey(void* user, unsigned key, bool pressed) {
- // TODO
+ if (!InputStreamKeyPress(user, key, pressed)) {
+ LOG("Failed to handle key press");
+ g_signal = SIGABRT;
+ }
+}
+
+static void InputStreamDtor(struct InputStream** input_stream) {
+ if (!*input_stream) return;
+ InputStreamDestroy(*input_stream);
+ *input_stream = NULL;
}
static void WindowDtor(struct Window** window) {
@@ -99,19 +117,31 @@ static void DecodeContextDtor(struct DecodeContext** decode_context) {
}
int main(int argc, char* argv[]) {
- if (argc < 2) {
- LOG("Usage: %s <ip>:<port>", argv[0]);
+ if (argc < 3) {
+ LOG("Usage: %s <ip>:<port> <ip>:<port>", argv[0]);
return EXIT_FAILURE;
}
int __attribute__((cleanup(SocketDtor))) sock = ConnectSocket(argv[1]);
if (sock == -1) return EXIT_FAILURE;
+ // TODO(mburakov): Use sock instead of sock2 once backend is ready.
+ int __attribute__((cleanup(SocketDtor))) sock2 = ConnectSocket(argv[2]);
+ if (sock2 == -1) return EXIT_FAILURE;
+
+ struct InputStream __attribute__((cleanup(InputStreamDtor)))* input_stream =
+ InputStreamCreate(sock2);
+ if (!input_stream) {
+ LOG("Failed to create input stream");
+ return EXIT_FAILURE;
+ }
+
static const struct WindowEventHandlers window_event_handlers = {
.OnClose = OnWindowClose,
+ .OnFocus = OnWindowFocus,
.OnKey = OnWindowKey,
};
struct Window __attribute__((cleanup(WindowDtor)))* window =
- WindowCreate(&window_event_handlers, NULL);
+ WindowCreate(&window_event_handlers, input_stream);
if (!window) {
LOG("Failed to create window");
return EXIT_FAILURE;
diff --git a/window.c b/window.c
index ff54f70..b7ae0ec 100644
--- a/window.c
+++ b/window.c
@@ -197,11 +197,12 @@ static void OnWlKeyboardKeymap(void* data, struct wl_keyboard* wl_keyboard,
static void OnWlKeyboardEnter(void* data, struct wl_keyboard* wl_keyboard,
uint32_t serial, struct wl_surface* surface,
struct wl_array* keys) {
- (void)data;
(void)wl_keyboard;
(void)serial;
(void)surface;
(void)keys;
+ struct Window* window = data;
+ window->event_handlers->OnFocus(window->user, true);
}
static void OnWlKeyboardLeave(void* data, struct wl_keyboard* wl_keyboard,
@@ -210,6 +211,8 @@ static void OnWlKeyboardLeave(void* data, struct wl_keyboard* wl_keyboard,
(void)wl_keyboard;
(void)serial;
(void)surface;
+ struct Window* window = data;
+ window->event_handlers->OnFocus(window->user, false);
}
static void OnWlKeyboardKey(void* data, struct wl_keyboard* wl_keyboard,
diff --git a/window.h b/window.h
index a0f6b0d..93c0ed0 100644
--- a/window.h
+++ b/window.h
@@ -26,6 +26,7 @@ struct Frame;
struct WindowEventHandlers {
void (*OnClose)(void* user);
+ void (*OnFocus)(void* user, bool focused);
void (*OnKey)(void* user, unsigned key, bool pressed);
};
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-15 05:23:23 +0000