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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include "command.h"
#ifdef HAVE_NETWORK_CMD
#include "netplay_compat.h"
#include "netplay.h"
#endif
#include "driver.h"
#include "general.h"
#include "compat/strl.h"
#include "compat/posix_string.h"
#include <stdio.h>
#include <string.h>
#ifndef _WIN32
#include <fcntl.h>
#include <unistd.h>
#endif
#define DEFAULT_NETWORK_CMD_PORT 55355
#define STDIN_BUF_SIZE 4096
struct rarch_cmd
{
#ifdef HAVE_STDIN_CMD
bool stdin_enable;
char stdin_buf[STDIN_BUF_SIZE];
size_t stdin_buf_ptr;
#endif
#ifdef HAVE_NETWORK_CMD
int net_fd;
#endif
bool state[RARCH_BIND_LIST_END];
};
static bool socket_nonblock(int fd)
{
#ifdef _WIN32
u_long mode = 1;
return ioctlsocket(fd, FIONBIO, &mode) == 0;
#else
return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK) == 0;
#endif
}
rarch_cmd_t *rarch_cmd_new(bool stdin_enable, bool network_enable, uint16_t port)
{
rarch_cmd_t *handle = (rarch_cmd_t*)calloc(1, sizeof(*handle));
if (!handle)
return NULL;
#ifdef HAVE_NETWORK_CMD
if (network_enable && !netplay_init_network())
return NULL;
RARCH_LOG("Bringing up command interface on port %hu.\n", (unsigned short)port);
handle->net_fd = -1;
struct addrinfo hints, *res = NULL;
memset(&hints, 0, sizeof(hints));
#if defined(_WIN32) || defined(HAVE_SOCKET_LEGACY)
hints.ai_family = AF_INET;
#else
hints.ai_family = AF_UNSPEC;
#endif
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE;
char port_buf[16];
int yes = 1;
snprintf(port_buf, sizeof(port_buf), "%hu", (unsigned short)port);
if (getaddrinfo(NULL, port_buf, &hints, &res) < 0)
goto error;
handle->net_fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
if (handle->net_fd < 0)
goto error;
if (!socket_nonblock(handle->net_fd))
goto error;
setsockopt(handle->net_fd, SOL_SOCKET, SO_REUSEADDR, CONST_CAST &yes, sizeof(int));
if (bind(handle->net_fd, res->ai_addr, res->ai_addrlen) < 0)
{
RARCH_ERR("Failed to bind socket.\n");
goto error;
}
#else
(void)network_enable;
(void)port;
#endif
#ifdef HAVE_STDIN_CMD
#ifndef _WIN32
if (stdin_enable && !socket_nonblock(STDIN_FILENO))
goto error;
#endif
handle->stdin_enable = stdin_enable;
#else
(void)stdin_enable;
#endif
#ifdef HAVE_NETWORK_CMD
freeaddrinfo(res);
#endif
return handle;
error:
#ifdef HAVE_NETWORK_CMD
if (res)
freeaddrinfo(res);
#endif
rarch_cmd_free(handle);
return NULL;
}
void rarch_cmd_free(rarch_cmd_t *handle)
{
#ifdef HAVE_NETWORK_CMD
if (handle->net_fd >= 0)
close(handle->net_fd);
#endif
free(handle);
}
struct cmd_map
{
const char *str;
unsigned id;
};
static const struct cmd_map map[] = {
{ "FAST_FORWARD", RARCH_FAST_FORWARD_KEY },
{ "FAST_FORWARD_HOLD", RARCH_FAST_FORWARD_HOLD_KEY },
{ "LOAD_STATE", RARCH_LOAD_STATE_KEY },
{ "SAVE_STATE", RARCH_SAVE_STATE_KEY },
{ "FULLSCREEN_TOGGLE", RARCH_FULLSCREEN_TOGGLE_KEY },
{ "QUIT", RARCH_QUIT_KEY },
{ "STATE_SLOT_PLUS", RARCH_STATE_SLOT_PLUS },
{ "STATE_SLOT_MINUS", RARCH_STATE_SLOT_MINUS },
{ "AUDIO_INPUT_RATE_PLUS", RARCH_AUDIO_INPUT_RATE_PLUS },
{ "AUDIO_INPUT_RATE_MINUS", RARCH_AUDIO_INPUT_RATE_MINUS },
{ "REWIND", RARCH_REWIND },
{ "MOVIE_RECORD_TOGGLE", RARCH_MOVIE_RECORD_TOGGLE },
{ "PAUSE_TOGGLE", RARCH_PAUSE_TOGGLE },
{ "FRAMEADVANCE", RARCH_FRAMEADVANCE },
{ "RESET", RARCH_RESET },
{ "SHADER_NEXT", RARCH_SHADER_NEXT },
{ "SHADER_PREV", RARCH_SHADER_PREV },
{ "CHEAT_INDEX_PLUS", RARCH_CHEAT_INDEX_PLUS },
{ "CHEAT_INDEX_MINUS", RARCH_CHEAT_INDEX_MINUS },
{ "CHEAT_TOGGLE", RARCH_CHEAT_TOGGLE },
{ "SCREENSHOT", RARCH_SCREENSHOT },
{ "DSP_CONFIG", RARCH_DSP_CONFIG },
{ "MUTE", RARCH_MUTE },
{ "NETPLAY_FLIP", RARCH_NETPLAY_FLIP },
{ "SLOWMOTION", RARCH_SLOWMOTION },
};
static void parse_sub_msg(rarch_cmd_t *handle, const char *tok)
{
for (unsigned i = 0; i < sizeof(map) / sizeof(map[0]); i++)
{
if (strcmp(tok, map[i].str) == 0)
{
handle->state[map[i].id] = true;
return;
}
}
RARCH_WARN("Unrecognized command \"%s\" received.\n", tok);
}
static void parse_msg(rarch_cmd_t *handle, char *buf)
{
char *save;
const char *tok = strtok_r(buf, "\n", &save);
while (tok)
{
parse_sub_msg(handle, tok);
tok = strtok_r(NULL, "\n", &save);
}
}
void rarch_cmd_set(rarch_cmd_t *handle, unsigned id)
{
if (id < RARCH_BIND_LIST_END)
handle->state[id] = true;
}
bool rarch_cmd_get(rarch_cmd_t *handle, unsigned id)
{
return id < RARCH_BIND_LIST_END && handle->state[id];
}
#ifdef HAVE_NETWORK_CMD
static void network_cmd_pre_frame(rarch_cmd_t *handle)
{
if (handle->net_fd < 0)
return;
fd_set fds;
FD_ZERO(&fds);
FD_SET(handle->net_fd, &fds);
struct timeval tmp_tv = {0};
if (select(handle->net_fd + 1, &fds, NULL, NULL, &tmp_tv) <= 0)
return;
if (!FD_ISSET(handle->net_fd, &fds))
return;
for (;;)
{
char buf[1024];
ssize_t ret = recvfrom(handle->net_fd, buf, sizeof(buf) - 1, 0, NULL, NULL);
if (ret <= 0)
break;
buf[ret] = '\0';
parse_msg(handle, buf);
}
}
#endif
#ifdef HAVE_STDIN_CMD
#ifdef _WIN32
// Oh you, Win32 ... <_<
static size_t read_stdin(char *buf, size_t size)
{
HANDLE hnd = GetStdHandle(STD_INPUT_HANDLE);
if (hnd == INVALID_HANDLE_VALUE)
return 0;
// Check first if we're a pipe
// (not console).
DWORD avail = 0;
bool echo = false;
// If not a pipe, check if we're running in a console.
if (!PeekNamedPipe(hnd, NULL, 0, NULL, &avail, NULL))
{
DWORD mode = 0;
if (!GetConsoleMode(hnd, &mode))
return 0;
if ((mode & (ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT))
&& !SetConsoleMode(hnd, mode & ~(ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT)))
return 0;
// Win32, Y U NO SANE NONBLOCK READ!?
DWORD has_read = 0;
INPUT_RECORD recs[256];
if (!PeekConsoleInput(hnd, recs, sizeof(recs) / sizeof(recs[0]), &has_read))
return 0;
bool has_key = false;
for (DWORD i = 0; i < has_read; i++)
{
// Very crude, but should get the job done ...
if (recs[i].EventType == KEY_EVENT &&
recs[i].Event.KeyEvent.bKeyDown &&
(isgraph(recs[i].Event.KeyEvent.wVirtualKeyCode) || recs[i].Event.KeyEvent.wVirtualKeyCode == VK_RETURN))
{
has_key = true;
echo = true;
avail = size;
break;
}
}
if (!has_key)
{
FlushConsoleInputBuffer(hnd);
return 0;
}
}
if (!avail)
return 0;
if (avail > size)
avail = size;
DWORD has_read = 0;
if (!ReadFile(hnd, buf, avail, &has_read, NULL))
return 0;
for (DWORD i = 0; i < has_read; i++)
if (buf[i] == '\r')
buf[i] = '\n';
// Console won't echo for us while in non-line mode, so do it manually ...
if (echo)
{
HANDLE hnd_out = GetStdHandle(STD_OUTPUT_HANDLE);
if (hnd_out != INVALID_HANDLE_VALUE)
{
DWORD has_written;
WriteConsole(hnd_out, buf, has_read, &has_written, NULL);
}
}
return has_read;
}
#else
static size_t read_stdin(char *buf, size_t size)
{
size_t has_read = 0;
while (size)
{
ssize_t ret = read(STDIN_FILENO, buf, size);
if (ret <= 0)
break;
buf += ret;
has_read += ret;
size -= ret;
}
return has_read;
}
#endif
static void stdin_cmd_pre_frame(rarch_cmd_t *handle)
{
if (!handle->stdin_enable)
return;
size_t ret = read_stdin(handle->stdin_buf + handle->stdin_buf_ptr, STDIN_BUF_SIZE - handle->stdin_buf_ptr - 1);
if (ret == 0)
return;
handle->stdin_buf_ptr += ret;
handle->stdin_buf[handle->stdin_buf_ptr] = '\0';
char *last_newline = strrchr(handle->stdin_buf, '\n');
if (!last_newline)
{
// We're receiving bogus data in pipe (no terminating newline),
// flush out the buffer.
if (handle->stdin_buf_ptr + 1 >= STDIN_BUF_SIZE)
{
handle->stdin_buf_ptr = 0;
handle->stdin_buf[0] = '\0';
}
return;
}
*last_newline++ = '\0';
ptrdiff_t msg_len = last_newline - handle->stdin_buf;
parse_msg(handle, handle->stdin_buf);
memmove(handle->stdin_buf, last_newline, handle->stdin_buf_ptr - msg_len);
handle->stdin_buf_ptr -= msg_len;
}
#endif
void rarch_cmd_pre_frame(rarch_cmd_t *handle)
{
memset(handle->state, 0, sizeof(handle->state));
#ifdef HAVE_NETWORK_CMD
network_cmd_pre_frame(handle);
#endif
#ifdef HAVE_STDIN_CMD
stdin_cmd_pre_frame(handle);
#endif
}
#ifdef HAVE_NETWORK_CMD
static bool send_udp_packet(const char *host, uint16_t port, const char *msg)
{
struct addrinfo hints, *res = NULL;
memset(&hints, 0, sizeof(hints));
#if defined(_WIN32) || defined(HAVE_SOCKET_LEGACY)
hints.ai_family = AF_INET;
#else
hints.ai_family = AF_UNSPEC;
#endif
hints.ai_socktype = SOCK_DGRAM;
int fd = -1;
bool ret = true;
char port_buf[16];
snprintf(port_buf, sizeof(port_buf), "%hu", (unsigned short)port);
if (getaddrinfo(host, port_buf, &hints, &res) < 0)
return false;
// Send to all possible targets.
// "localhost" might resolve to several different IPs.
const struct addrinfo *tmp = res;
while (tmp)
{
fd = socket(tmp->ai_family, tmp->ai_socktype, tmp->ai_protocol);
if (fd < 0)
{
ret = false;
goto end;
}
ssize_t len = strlen(msg);
ssize_t ret = sendto(fd, msg, len, 0, tmp->ai_addr, tmp->ai_addrlen);
if (ret < len)
{
ret = false;
goto end;
}
close(fd);
fd = -1;
tmp = tmp->ai_next;
}
end:
freeaddrinfo(res);
if (fd >= 0)
close(fd);
return ret;
}
static bool verify_command(const char *cmd)
{
for (unsigned i = 0; i < sizeof(map) / sizeof(map[0]); i++)
{
if (strcmp(map[i].str, cmd) == 0)
return true;
}
RARCH_ERR("Command \"%s\" is not recognized by RetroArch.\n", cmd);
RARCH_ERR("\tValid commands:\n");
for (unsigned i = 0; i < sizeof(map) / sizeof(map[0]); i++)
RARCH_ERR("\t\t%s\n", map[i].str);
return false;
}
bool network_cmd_send(const char *cmd_)
{
if (!netplay_init_network())
return NULL;
char *command = strdup(cmd_);
if (!command)
return false;
bool old_verbose = g_extern.verbose;
g_extern.verbose = true;
const char *cmd = NULL;
const char *host = NULL;
const char *port_ = NULL;
uint16_t port = DEFAULT_NETWORK_CMD_PORT;
char *save;
cmd = strtok_r(command, ":", &save);
if (cmd)
host = strtok_r(NULL, ":", &save);
if (host)
port_ = strtok_r(NULL, ":", &save);
if (!host)
{
#ifdef _WIN32
host = "127.0.0.1";
#else
host = "localhost";
#endif
}
if (port_)
port = strtoul(port_, NULL, 0);
RARCH_LOG("Sending command: \"%s\" to %s:%hu\n", cmd, host, (unsigned short)port);
bool ret = verify_command(cmd) && send_udp_packet(host, port, cmd);
free(command);
g_extern.verbose = old_verbose;
return ret;
}
#endif
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