flash.c

#include <stdio.h>
#include <windows.h>
#include <winsock2.h>

int pid = 0;
STARTUPINFO lpStartupInfo;
PROCESS_INFORMATION lpProcessInformation;

BOOL CALLBACK EnumChildWindowsProc(HWND hwnd, LPARAM lparam){
    DWORD p;
    GetWindowThreadProcessId(hwnd, &p);
    if(pid == p){
        FlashWindow((HWND)lparam, FALSE);
    }
    return 1;
}

BOOL CALLBACK EnumWindowsProc(HWND hwnd, LPARAM lparam){
    DWORD p;
    GetWindowThreadProcessId(hwnd, &p);
    EnumChildWindows(hwnd, EnumChildWindowsProc, (INT)hwnd);
    return 1;
}

int flash(){
    char s[256];
    FILE *p;
    p = _popen("C:\\Windows\\System32\\netstat.exe -on", "rt");
    for(int i = 0; i < 4; i++){
        fgets(s, 256, p);
    }
    char s1[16];
    char s2[12];
    char s3[6];
    int ls = 0;
    while(fgets(s, 256, p) != NULL){
        int cc = 0;
        for(int i = 0; i < strlen(s); i++){
            if(s[i] == ' '){
                ls = i;
            }else if(i - ls == 1){
                if(cc == 2){
                    strncpy(s1, &s[i], 15);
                    s1[15] = 0;
                }
                else if(cc == 3){
                    strncpy(s2, &s[i], 11);
                    s2[11] = 0;
                }
                else if(cc == 4){
                    strncpy(s3, &s[i], strlen(s) - i);
                    s3[strlen(s) - (i + 1)] = 0;
                }
                cc++;
            }
        }
        if(strcmp("127.0.0.1:50007", s1) == 0 && strcmp("ESTABLISHED", s2) == 0){
            pid = atoi(s3);
            EnumWindows(EnumWindowsProc, 0);
        }
    }
    return 0;
}

int main(int argc, char **argv){
    BOOL sv = FALSE;
    char b[4096];
    int sl = sizeof (BOOL);
    int r = 0;
    char *s = "HTTP/1.0 200 OK\r\nContent-Type: image/gif\r\n\r\n\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x00\x00\x00\x2c\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x4c\x01\x00\x3b";
    struct sockaddr_in service;
    service.sin_family = AF_INET;
    service.sin_addr.s_addr = inet_addr("127.0.0.1");
    service.sin_port = htons(50007);
    WSADATA wsaData;

    SOCKET a = INVALID_SOCKET;
    SOCKET listener = INVALID_SOCKET;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    while(1){
        listener = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        r = setsockopt(listener, SOL_SOCKET, SO_REUSEADDR, (char *) &sv, sl);
        bind(listener, (SOCKADDR *) &service, sizeof(service));
        listen(listener, 1);
        a = accept(listener, NULL, NULL);
        r = recv(a, b, 4096, 0);
        if(strncmp(b, "GET ", 4) == 0){
            flash();
            send(a, s, 73, 0);
        }
        shutdown(a, 2); shutdown(listener, 2);
        closesocket(a); closesocket(listener);
    }
    return 0;
}

tcc.exe lib\wsock32.def lib\user32.def examples\instfls.c