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#include <raylib.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#define WIFI_HOTSPOT_IP "127.0.0.1"
static uint16_t display_framebuffer[DISPLAY_WIDTH * DISPLAY_HEIGHT];
static bool display_state;
void display_setup(void) {
InitWindow(DISPLAY_WIDTH, DISPLAY_HEIGHT, "ILI9341 screen");
}
void display_on(void) {
display_state = true;
}
void display_off(void) {
display_state = false;
}
void display_begin(void) {}
void display_end(void) {
BeginDrawing();
if (display_state) {
for (int32_t y = 0; y < DISPLAY_HEIGHT; y++) {
for (int32_t x = 0; x < DISPLAY_WIDTH; x++) {
uint16_t c = display_framebuffer[y * DISPLAY_WIDTH + x];
uint8_t r = (c & 0b1111100000000000) >> 8;
uint8_t g = (c & 0b0000011111100000) >> 3;
uint8_t b = (c & 0b0000000000011111) << 3;
DrawPixel(x, y, (Color){ r, g, b, 255 });
}
}
} else {
for (int32_t y = 0; y < DISPLAY_HEIGHT; y++) {
for (int32_t x = 0; x < DISPLAY_WIDTH; x++) {
DrawPixel(x, y, (Color){ 0, 0, 0, 255 });
}
}
}
EndDrawing();
if (WindowShouldClose()) {
CloseWindow();
exit(1);
}
}
void display_clear(uint16_t color) {
for (int i = 0; i < DISPLAY_WIDTH * DISPLAY_HEIGHT; i++)
display_framebuffer[i] = color;
}
void display_set_pixel(int32_t x, int32_t y, uint16_t color) {
if (x < 0 || x >= DISPLAY_WIDTH || y < 0 || y >= DISPLAY_HEIGHT)
return;
display_framebuffer[y * DISPLAY_WIDTH + x] = color;
}
void button_setup(void) { }
bool button_get(void) {
PollInputEvents();
return IsKeyDown(KEY_SPACE);
}
static int server_fd = -1;
static WifiHandler current_handler = nullptr;
static void set_nonblocking(int fd) {
fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
}
void wifi_setup(void) { }
void wifi_hotspot_start(const char *ssid, const char *password, WifiHandler handler) {
(void)ssid; (void)password;
current_handler = handler;
server_fd = socket(AF_INET, SOCK_STREAM, 0);
if (server_fd < 0) { printf("socket failed: %s\n", strerror(errno)); return; }
int opt = 1;
if (setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) < 0)
printf("setsockopt failed: %s\n", strerror(errno));
set_nonblocking(server_fd);
struct sockaddr_in addr = {};
addr.sin_family = AF_INET;
addr.sin_port = htons(8080);
addr.sin_addr.s_addr = INADDR_ANY;
if (bind(server_fd, (struct sockaddr *)&addr, sizeof(addr)) < 0)
{ printf("bind failed: %s\n", strerror(errno)); return; }
if (listen(server_fd, 4) < 0)
{ printf("listen failed: %s\n", strerror(errno)); return; }
printf("emulated hotspot at http://localhost:8080\n");
}
void wifi_hotspot_stop(void) {
if (server_fd >= 0) {
close(server_fd);
server_fd = -1;
printf("stopped hotspot\n");
}
}
void wifi_tick(void) {
if (server_fd < 0) return;
int client = accept(server_fd, nullptr, nullptr);
if (client < 0) { // no pending connection, non-blocking
if (errno != EAGAIN && errno != EWOULDBLOCK)
printf("accept error: %s\n", strerror(errno));
return;
}
printf("got connection\n");
char buf[2048] = {};
read(client, buf, sizeof(buf) - 1);
// parse first line: "GET /uri HTTP/1.1"
char method[8] = {}, uri[256] = {};
sscanf(buf, "%7s %255s", method, uri);
// find body after \r\n\r\n
const char *body = strstr(buf, "\r\n\r\n");
if (body) body += 4;
WifiRequest req = {
.uri = uri,
.method = method,
.body = (body && *body) ? body : nullptr,
};
WifiResponse res = current_handler(&req);
char header[256];
snprintf(header, sizeof(header),
"HTTP/1.1 %d OK\r\n"
"Content-Type: %s\r\n"
"Content-Length: %zu\r\n"
"Connection: close\r\n"
"\r\n",
res.status, res.content_type, strlen(res.body)
);
write(client, header, strlen(header));
write(client, res.body, strlen(res.body));
close(client);
}
uint32_t millis() {
return (uint32_t)(GetTime() * 1000);
}
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