kenji/webkeyboard
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base: kenji/webkeyboard:v0.2.2
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kenji/webkeyboard:main
kenji/webkeyboard:v0.3.1 kenji/webkeyboard:v0.3.0 kenji/webkeyboard:v0.2.3 kenji/webkeyboard:v0.2.2 kenji/webkeyboard:v0.2.1 kenji/webkeyboard:v0.2.0 kenji/webkeyboard:v0.1.0
..
compare: kenji/webkeyboard:f628003c66724dd84069a739ca784d9f4fae834b
Branches Tags
kenji/webkeyboard:main
kenji/webkeyboard:v0.3.1 kenji/webkeyboard:v0.3.0 kenji/webkeyboard:v0.2.3 kenji/webkeyboard:v0.2.2 kenji/webkeyboard:v0.2.1 kenji/webkeyboard:v0.2.0 kenji/webkeyboard:v0.1.0

1 Commits
v0.2.2 .. f628003c66

Author SHA1 Message Date
kenji f628003c66 send keys over WebSocket 2025-07-20 17:41:47 -04:00
9 changed files with 414 additions and 441 deletions
Expand all files Collapse all files
README.md
-2
View File
@@ -12,8 +12,6 @@ graphical interface served on the webpage.
## Setup
[Installation and demo video](https://youtu.be/uORnxt5DLTw)
Download the webkeyboard.uf2 file from the latest
[release](https://git.kkozai.com/kenji/webkeyboard/releases) and flash
onto the Raspberry Pi Pico W by holding down the BOOTSEL button while plugging
html/index.html
+2 -5
View File
@@ -250,6 +250,8 @@ window.onload = (event) => {
window.addEventListener("keyup", onKeyUp, true);
socket = new WebSocket("ws://" + window.location.hostname + ":8080/");
//socket.onopen = function (event) { document.getElementById("websocket").innerHTML="connected"; };
//socket.onclose = function (event) { document.getElementById("websocket").innerHTML="closed"; };
socket.onmessage = function (event) { updateLEDs(event.data); };
}
@@ -330,11 +332,6 @@ function sendKeys(curKeys, is_mouse) {
} else {
socket.send("K: " + curKeys);
}
} else if (socket.readyState == WebSocket.CLOSED) {
socket = new WebSocket("ws://" + window.location.hostname + ":8080/");
setTimeout( function () { sendKeys(curKeys, is_mouse); }, 10);
} else {
setTimeout( function () { sendKeys(curKeys, is_mouse); }, 10);
}
}
html/indicators.shtml
+15
View File
@@ -0,0 +1,15 @@
<!DOCTYPE html>
<html>
<head>
<title>Keyboard Indicators</title>
</head>
<body>
<div id="num" class="<!--#num-->">NumLock</div>
<div id="caps" class="<!--#caps-->">CapsLock</div>
<div id="scroll" class="<!--#scroll-->">ScrollLock</div>
</body>
</html>
my_fsdata.c
+360 -324
View File
@@ -13,6 +13,46 @@ static const unsigned char data_fsdata_c[] = {
0x2f, 0x70, 0x6c, 0x61, 0x69, 0x6e, 0xd, 0xa, 0xd, 0xa,
};
static const unsigned char data_indicators_shtml[] = {
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static const unsigned char data_wifi_shtml[] = {
/* /wifi.shtml */
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@@ -975,7 +1015,27 @@ static const unsigned char data_index_html[] = {
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@@ -1161,351 +1221,325 @@ static const unsigned char data_index_html[] = {
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0x64, 0x69, 0x76, 0x3e, 0xa, 0x3c, 0x2f, 0x64, 0x69, 0x76,
0x3e, 0xa, 0xa, 0x3c, 0x2f, 0x62, 0x6f, 0x64, 0x79, 0x3e,
0xa, 0xa, 0x3c, 0x2f, 0x68, 0x74, 0x6d, 0x6c, 0x3e, 0xa,
};
static const unsigned char data_success_html[] = {
/* /success.html */
@@ -1568,7 +1602,9 @@ static const unsigned char data_success_html[] = {
const struct fsdata_file file_fsdata_c[] = {{NULL, data_fsdata_c, data_fsdata_c + 10, sizeof(data_fsdata_c) - 10, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
const struct fsdata_file file_wifi_shtml[] = {{file_fsdata_c, data_wifi_shtml, data_wifi_shtml + 12, sizeof(data_wifi_shtml) - 12, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
const struct fsdata_file file_indicators_shtml[] = {{file_fsdata_c, data_indicators_shtml, data_indicators_shtml + 18, sizeof(data_indicators_shtml) - 18, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
const struct fsdata_file file_wifi_shtml[] = {{file_indicators_shtml, data_wifi_shtml, data_wifi_shtml + 12, sizeof(data_wifi_shtml) - 12, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
const struct fsdata_file file_index_html[] = {{file_wifi_shtml, data_index_html, data_index_html + 12, sizeof(data_index_html) - 12, FS_FILE_FLAGS_HEADER_INCLUDED | FS_FILE_FLAGS_HEADER_PERSISTENT}};
@@ -1576,4 +1612,4 @@ const struct fsdata_file file_success_html[] = {{file_index_html, data_success_h
#define FS_ROOT file_success_html
#define FS_NUMFILES 4
#define FS_NUMFILES 5
parse_keys.c
+4 -4
View File
@@ -50,8 +50,8 @@ void parse_key_list(char * keys) {
}
void parse_mouse_list (char * keys) {
static unsigned char mouse_report[5];
memset(mouse_report, 0x00, 5);
static unsigned char mouse_report[3];
memset(mouse_report, 0x00, 3);
// Javascript sends the list as comma delimited, so split into individual
// keys by splitting at commas
@@ -75,11 +75,11 @@ void parse_mouse_list (char * keys) {
// print resulting HID boot mouse report to CDC for debugging
printf("Mouse report: ");
for(int i=0; i<5; i++){
for(int i=0; i<3; i++){
printf("%02X ",mouse_report[i]);
}
printf("\n");
tud_hid_report(REPORT_ID_MOUSE, mouse_report, 5);
tud_hid_report(REPORT_ID_MOUSE, mouse_report, 3);
}
// take a single Javascript key code and convert it to USB HID scancode
server.c
+17 -3
View File
@@ -66,6 +66,7 @@ const char * ip_parts[] = {
#define NPARTS ( sizeof( ip_parts )/ sizeof(ip_parts[0]) )
static const tCGI cgi_handlers[] = {
{ "/sendkeys.cgi", sendkeys_cgi },
{ "/reboot.cgi", reboot_cgi },
};
@@ -132,7 +133,7 @@ void run_http_server() {
// start the HTTP web server for keyboard input and config page
httpd_init();
http_set_cgi_handlers(cgi_handlers, 1);
http_set_cgi_handlers(cgi_handlers, 2);
for (size_t i = 0; i < LWIP_ARRAYSIZE(ssi_tags); i++) {
LWIP_ASSERT("tag too long for LWIP_HTTPD_MAX_TAG_NAME_LEN",
strlen(ssi_tags[i]) <= LWIP_HTTPD_MAX_TAG_NAME_LEN);
@@ -188,6 +189,21 @@ void run_http_server() {
}
}
// lwIP cgi handler for GET requests to sendkeys.cgi
const char * sendkeys_cgi (int iIndex, int iNumParams, char *pcParam[], char *pcValue[]) {
for (int i=0; i < iNumParams; i++) {
// search GET parameters for keys and forward for processing to USB
if (strcmp(pcParam[i], "keys") == 0 ) {
parse_key_list(pcValue[i]);
}
}
lastActive= get_absolute_time();
// send return page
return "/success.html";
}
// lwIP cgi handler for reboots initiated from the web
const char * reboot_cgi(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]) {
// turn on reboot flag to prevent watchdog from updating
@@ -453,8 +469,6 @@ const void ws_receive_handler(uint8_t *data, uint16_t len) {
} else if (strncmp(data, "M: ", 3) == 0) {
parse_mouse_list(&data[3]);
}
lastActive= get_absolute_time();
}
// save keyboard's LED indicator status to memory
server.h
+1
View File
@@ -23,6 +23,7 @@ typedef struct {
} net_config;
void run_http_server();
const char * sendkeys_cgi(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
const char * reboot_cgi(int iIndex, int iNumParams, char *pcParam[], char *pcValue[]);
uint16_t __time_critical_func(ssi_handler)(int iIndex, char *pcInsert, int iInsertLen);
void set_indicator(uint8_t const* buffer);
websocket.c
+14 -93
View File
@@ -13,9 +13,6 @@ static const char WS_RESPONSE[] = "HTTP/1.1 101 Switching Protocols\r\n" \
"Connection: Upgrade\r\n" \
"Sec-WebSocket-Accept: ";
static uint8_t buf[WS_BUFFER_SIZE];
static uint16_t buf_len=0;
static tWSHandler ws_receive_cb = NULL;
static tWSOpenHandler ws_open_cb = NULL;
@@ -123,7 +120,6 @@ static err_t ws_accept(void *arg, struct altcp_pcb *pcb, err_t err) {
// register callbacks for tcp events
altcp_recv(pcb, ws_recv);
altcp_sent(pcb, ws_sent);
altcp_poll(pcb, ws_poll, WS_POLL_INTERVAL);
altcp_err(pcb, ws_err);
@@ -170,24 +166,6 @@ static err_t ws_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err
return ERR_OK;
}
// called when data has been sent over the websocket
static err_t ws_sent(void *arg, struct altcp_pcb *pcb, uint16_t len) {
struct ws_state *wss = (struct ws_state *)arg;
LWIP_DEBUGF(WS_DEBUG | LWIP_DBG_TRACE, ("ws_sent %p\n", (void*) pcb));
LWIP_UNUSED_ARG(len);
if (wss == NULL) {
return ERR_OK;
}
wss->retries = 0;
return ERR_OK;
}
// called when there is a websocket error
static void ws_err (void *arg, err_t err) {
struct ws_state *wss = (struct ws_state *) arg;
LWIP_UNUSED_ARG(err);
@@ -214,7 +192,6 @@ static err_t ws_close_or_abort_conn(struct altcp_pcb *pcb, struct ws_state *wss,
// clear callbacks
altcp_arg(pcb, NULL);
altcp_recv(pcb, NULL);
altcp_sent(pcb, NULL);
altcp_poll(pcb, NULL, 0);
altcp_err(pcb, NULL);
@@ -333,87 +310,30 @@ static err_t ws_read(struct altcp_pcb *pcb, struct ws_state *wss, struct pbuf *p
// successful read, reset timeout
wss->retries = 0;
uint8_t fin = data[0] & 0x80;
uint8_t opcode = data[0] & 0x0F;
uint8_t masked = data[1] & 0x80;
uint8_t mode = data[0] & 0x0F;
uint16_t msg_len = data[1] & 0x7F;
uint8_t *msg;
switch (msg_len) {
case 126: // next two bytes are length
memcpy(&msg_len, &data[2], 2);
if (len >= 8) {
msg = &data[8];
}
break;
case 127: // next four bytes are length
// lwIP's pbuf only handles 16-bit lengths, so error
return ERR_ARG;
//memcpy(&msg_len, &data[2], 4);
//if (len >= 10) {
// msg = &data[10];
//}
//break;
default:
if (len >= 6) {
msg = &data[6];
}
break;
}
switch (opcode) {
case OP_CONT:
LWIP_DEBUGF(WS_DEBUG, ("ws_read: received continuation frame\n"));
case OP_TEXT:
switch (mode) {
case 0x01: //text
LWIP_DEBUGF(WS_DEBUG, ("ws_read: received text data\n"));
case OP_BINARY:
LWIP_DEBUGF(WS_DEBUG, ("ws_read: decoding data, len=%u\n", msg_len));
if (msg && ws_receive_cb != NULL) {
// unmask the data if mask bit is received
if (masked) {
uint8_t *mask = &data[2];
case 0x02: //binary
LWIP_DEBUGF(WS_DEBUG, ("ws_read: decoding data\n"));
if (len >= 6 && ws_receive_cb != NULL) {
uint8_t *mask = &data[2];
uint8_t *msg = &data[6];
for (int i=0; i<msg_len; i++) {
msg[i] ^= mask[i % 4];
}
} else {
// messages from client must be masked - disconnect
LWIP_DEBUGF(WS_DEBUG, ("ws_read: received unmasked message"));
return ERR_CLSD;
for (int i=0; i<msg_len; i++) {
msg[i] ^= mask[i % 4];
}
msg[msg_len]=0;
if (opcode != OP_CONT) { // not a continuation frame, reset buffer
buf_len=0;
memset(buf, 0x00, sizeof(buf));
}
memcpy(&buf[buf_len], msg, msg_len);
buf_len += msg_len;
if (fin) { // last packet in message, process completed message
ws_receive_cb(buf, buf_len);
}
ws_receive_cb(msg, msg_len);
}
break;
case OP_CLOSE:
case 0x08: //close
LWIP_DEBUGF(WS_DEBUG, ("ws_read: close request"));
return ERR_CLSD;
case OP_PING:
// control frames cannot exceed 125 bytes in length
if (msg && msg_len <= 125) {
// send back a pong
uint8_t pong[2+msg_len];
pong[0]=0x8A;
pong[1]=msg_len;
memcpy(&pong[2], msg, msg_len);
return ws_send(wss, pong, msg_len+2);
}
return ERR_ARG;
case OP_PONG: // no response required for pong
return ERR_OK;
default:
LWIP_DEBUGF(WS_DEBUG, ("ws_read: invalid opcode %02X\n", opcode));
LWIP_DEBUGF(WS_DEBUG, ("ws_read: invalid data mode %02X\n", mode));
return ERR_ARG;
}
@@ -433,6 +353,7 @@ static err_t ws_send(struct ws_state *wss, uint8_t *data, uint16_t len) {
err = altcp_write(wss->pcb, buf, len+2, TCP_WRITE_FLAG_COPY);
if (err == ERR_OK) {
altcp_output(wss->pcb);
wss->retries = 0;
}
return err;
websocket.h
-9
View File
@@ -7,14 +7,6 @@
#define WS_MAX_RETRIES 10
#define WS_POLL_INTERVAL 60 // WS_POLL_INTERVAL/2 seconds
#define WS_MAX_CONN 4
#define WS_BUFFER_SIZE 512
#define OP_CONT 0x00
#define OP_TEXT 0x01
#define OP_BINARY 0x02
#define OP_CLOSE 0x08
#define OP_PING 0x09
#define OP_PONG 0x0A
struct ws_state {
bool active;
@@ -35,7 +27,6 @@ void ws_server_init(void);
static void ws_server_init_pcb( struct altcp_pcb *pcb, uint16_t port);
static err_t ws_accept(void *arg, struct altcp_pcb *pcb, err_t err);
static err_t ws_recv(void *arg, struct altcp_pcb *pcb, struct pbuf *p, err_t err);
static err_t ws_sent(void *arg, struct altcp_pcb *pcb, uint16_t len);
static void ws_err (void *arg, err_t err);
static err_t ws_close_conn(struct altcp_pcb *pcb, struct ws_state *wss);
static err_t ws_close_or_abort_conn(struct altcp_pcb *pcb, struct ws_state *wss, uint8_t abort_conn);