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#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <rfb/rfb.h>
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
int logdirenabled = 0;
int fdlog = -1;
char logfn[64] = "";
int mkderp(const char *name) {
int ret = mkdir(name, S_IRWXU | S_IRWXG | S_IRWXO);
if (ret < 0 && errno == EEXIST) {
return 0;
}
return ret;
}
int spewtxt(int fd, const char *fmt, ...) {
va_list va;
char buf[256] = {0xF0, 0x9F, 0xBF, 0xBF, '\n', 0};
va_start(va, fmt);
vsnprintf(buf + 5, sizeof(buf) - 5, fmt, va);
va_end(va);
size_t len = strlen(buf);
buf[len++] = '\n';
return write(fd, buf, len);
}
int spewchr(int fd, uint16_t chr) {
char buf[4];
int i = 0;
if (chr < 0x80) {
buf[i++] = chr;
} else if (chr < 0x800) {
buf[i++] = 0xC0 | chr >> 6;
buf[i++] = 0x80 | chr & 0x3F;
} else {
buf[i++] = 0xE0 | chr >> 12;
buf[i++] = 0x80 | (chr >> 6) & 0x3F;
buf[i++] = 0x80 | chr & 0x3F;
}
return write(fd, buf, i);
}
int openlogfile() {
char curfn[64];
time_t now;
time(&now);
strftime(curfn, 64, "%Y-%m-%d_%H", localtime(&now));
if (!strncmp(curfn, logfn, 64))
return 0;
int fd = open(curfn, O_CREAT | O_APPEND | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0) {
perror("open logfile");
return 1;
}
if (fdlog != -1 && close(fdlog) < 0) {
perror("close logfile");
}
fdlog = fd;
return 0;
}
void userofflog(rfbClientRec *cl) {
if (openlogfile()) return;
if (spewtxt(fdlog, "disconnect %s", cl->host) < 0)
perror("spewtxt");
}
enum rfbNewClientAction useronlog(rfbClientRec *cl) {
cl->clientGoneHook = userofflog;
if (openlogfile()) return RFB_CLIENT_ACCEPT;
if (spewtxt(fdlog, "connect %s", cl->host) < 0)
perror("spewtxt");
return RFB_CLIENT_ACCEPT;
}
void keylog(rfbBool down, rfbKeySym keySym, rfbClientRec* cl) {
if (!down) return; // only log key downs
if (openlogfile()) return; // ensure log file opened
if (spewchr(fdlog, (uint16_t) keySym) < 0)
perror("spewchr");
}
int main(int argc, char const *argv[]) {
if (argc < 3) {
printf("usage: %s IMAGEFILE TITLE [LOGDIR]\n", argv[0]);
return 0;
}
if (argc >= 4) {
if (mkderp(argv[3]) < 0) {
perror("mkdir logdir");
return 1;
}
if (chdir(argv[3]) < 0) {
perror("chdir logdir");
return 1;
}
logdirenabled = 1;
}
int imx, imy, imc;
unsigned char *im = stbi_load(argv[1], &imx, &imy, &imc, 4);
if (im == NULL) {
printf("bad image: %s\n", stbi_failure_reason());
return 1;
}
rfbScreenInfoPtr rfbScreen = rfbGetScreen(NULL, NULL, imx, imy, 8, 3, 4);
rfbScreen->desktopName = argv[2] ? argv[2] : "";
rfbScreen->frameBuffer = (char*)im;
rfbScreen->alwaysShared = TRUE;
if (logdirenabled) {
rfbScreen->newClientHook = useronlog;
rfbScreen->kbdAddEvent = keylog;
}
rfbInitServer(rfbScreen);
rfbRunEventLoop(rfbScreen, -1, FALSE);
stbi_image_free(im);
rfbScreenCleanup(rfbScreen);
return 0;
}
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