mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-25 00:49:47 +00:00
315 lines
7.8 KiB
C
315 lines
7.8 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2012 - Hans-Kristian Arntzen
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "netplay_compat.h"
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#include "netplay.h"
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#include "network_cmd.h"
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#include "driver.h"
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#include "general.h"
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#include "compat/strl.h"
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#include "compat/posix_string.h"
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#include <stdio.h>
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#include <string.h>
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#define DEFAULT_NETWORK_CMD_PORT 55355
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struct network_cmd
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{
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int fd;
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bool state[RARCH_BIND_LIST_END];
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};
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static bool socket_nonblock(int fd)
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{
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#ifdef _WIN32
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u_long mode = 1;
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return ioctlsocket(fd, FIONBIO, &mode) == 0;
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#else
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return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK) == 0;
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#endif
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}
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network_cmd_t *network_cmd_new(uint16_t port)
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{
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if (!netplay_init_network())
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return NULL;
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network_cmd_t *handle = (network_cmd_t*)calloc(1, sizeof(*handle));
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if (!handle)
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return NULL;
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RARCH_LOG("Bringing up command interface on port %hu.\n", (unsigned short)port);
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handle->fd = -1;
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struct addrinfo hints, *res = NULL;
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memset(&hints, 0, sizeof(hints));
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#if defined(_WIN32) || defined(HAVE_SOCKET_LEGACY)
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hints.ai_family = AF_INET;
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#else
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hints.ai_family = AF_UNSPEC;
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#endif
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hints.ai_socktype = SOCK_DGRAM;
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hints.ai_flags = AI_PASSIVE;
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char port_buf[16];
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int yes = 1;
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snprintf(port_buf, sizeof(port_buf), "%hu", (unsigned short)port);
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if (getaddrinfo(NULL, port_buf, &hints, &res) < 0)
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goto error;
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handle->fd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
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if (handle->fd < 0)
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goto error;
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if (!socket_nonblock(handle->fd))
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goto error;
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setsockopt(handle->fd, SOL_SOCKET, SO_REUSEADDR, CONST_CAST &yes, sizeof(int));
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if (bind(handle->fd, res->ai_addr, res->ai_addrlen) < 0)
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{
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RARCH_ERR("Failed to bind socket.\n");
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goto error;
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}
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freeaddrinfo(res);
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return handle;
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error:
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if (res)
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freeaddrinfo(res);
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network_cmd_free(handle);
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return NULL;
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}
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void network_cmd_free(network_cmd_t *handle)
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{
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if (handle->fd >= 0)
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close(handle->fd);
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free(handle);
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}
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struct cmd_map
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{
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const char *str;
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unsigned id;
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};
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static const struct cmd_map map[] = {
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{ "FAST_FORWARD", RARCH_FAST_FORWARD_KEY },
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{ "FAST_FORWARD_HOLD", RARCH_FAST_FORWARD_HOLD_KEY },
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{ "LOAD_STATE", RARCH_LOAD_STATE_KEY },
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{ "SAVE_STATE", RARCH_SAVE_STATE_KEY },
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{ "FULLSCREEN_TOGGLE", RARCH_FULLSCREEN_TOGGLE_KEY },
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{ "QUIT", RARCH_QUIT_KEY },
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{ "STATE_SLOT_PLUS", RARCH_STATE_SLOT_PLUS },
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{ "STATE_SLOT_MINUS", RARCH_STATE_SLOT_MINUS },
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{ "AUDIO_INPUT_RATE_PLUS", RARCH_AUDIO_INPUT_RATE_PLUS },
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{ "AUDIO_INPUT_RATE_MINUS", RARCH_AUDIO_INPUT_RATE_MINUS },
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{ "REWIND", RARCH_REWIND },
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{ "MOVIE_RECORD_TOGGLE", RARCH_MOVIE_RECORD_TOGGLE },
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{ "PAUSE_TOGGLE", RARCH_PAUSE_TOGGLE },
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{ "FRAMEADVANCE", RARCH_FRAMEADVANCE },
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{ "RESET", RARCH_RESET },
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{ "SHADER_NEXT", RARCH_SHADER_NEXT },
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{ "SHADER_PREV", RARCH_SHADER_PREV },
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{ "CHEAT_INDEX_PLUS", RARCH_CHEAT_INDEX_PLUS },
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{ "CHEAT_INDEX_MINUS", RARCH_CHEAT_INDEX_MINUS },
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{ "CHEAT_TOGGLE", RARCH_CHEAT_TOGGLE },
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{ "SCREENSHOT", RARCH_SCREENSHOT },
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{ "DSP_CONFIG", RARCH_DSP_CONFIG },
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{ "MUTE", RARCH_MUTE },
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{ "NETPLAY_FLIP", RARCH_NETPLAY_FLIP },
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{ "SLOWMOTION", RARCH_SLOWMOTION },
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};
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static void parse_sub_msg(network_cmd_t *handle, const char *tok)
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{
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for (unsigned i = 0; i < sizeof(map) / sizeof(map[0]); i++)
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{
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if (strcmp(tok, map[i].str) == 0)
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{
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handle->state[map[i].id] = true;
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return;
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}
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}
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RARCH_WARN("Unrecognized command \"%s\" received.\n", tok);
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}
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static void parse_msg(network_cmd_t *handle, char *buf)
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{
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char *save;
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const char *tok = strtok_r(buf, "\n", &save);
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while (tok)
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{
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parse_sub_msg(handle, tok);
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tok = strtok_r(NULL, "\n", &save);
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}
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}
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void network_cmd_set(network_cmd_t *handle, unsigned id)
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{
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if (id < RARCH_BIND_LIST_END)
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handle->state[id] = true;
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}
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bool network_cmd_get(network_cmd_t *handle, unsigned id)
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{
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return id < RARCH_BIND_LIST_END && handle->state[id];
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}
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void network_cmd_pre_frame(network_cmd_t *handle)
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{
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memset(handle->state, 0, sizeof(handle->state));
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fd_set fds;
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FD_ZERO(&fds);
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FD_SET(handle->fd, &fds);
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struct timeval tmp_tv = {0};
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if (select(handle->fd + 1, &fds, NULL, NULL, &tmp_tv) <= 0)
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return;
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if (!FD_ISSET(handle->fd, &fds))
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return;
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for (;;)
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{
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char buf[1024];
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ssize_t ret = recvfrom(handle->fd, buf, sizeof(buf) - 1, 0, NULL, NULL);
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if (ret <= 0)
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break;
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buf[ret] = '\0';
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parse_msg(handle, buf);
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}
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}
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static bool send_udp_packet(const char *host, uint16_t port, const char *msg)
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{
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struct addrinfo hints, *res = NULL;
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memset(&hints, 0, sizeof(hints));
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#if defined(_WIN32) || defined(HAVE_SOCKET_LEGACY)
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hints.ai_family = AF_INET;
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#else
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hints.ai_family = AF_UNSPEC;
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#endif
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hints.ai_socktype = SOCK_DGRAM;
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int fd = -1;
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bool ret = true;
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char port_buf[16];
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snprintf(port_buf, sizeof(port_buf), "%hu", (unsigned short)port);
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if (getaddrinfo(host, port_buf, &hints, &res) < 0)
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return false;
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// Send to all possible targets.
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// "localhost" might resolve to several different IPs.
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const struct addrinfo *tmp = res;
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while (tmp)
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{
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fd = socket(tmp->ai_family, tmp->ai_socktype, tmp->ai_protocol);
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if (fd < 0)
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{
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ret = false;
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goto end;
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}
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ssize_t len = strlen(msg);
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ssize_t ret = sendto(fd, msg, len, 0, tmp->ai_addr, tmp->ai_addrlen);
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if (ret < len)
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{
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ret = false;
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goto end;
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}
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close(fd);
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fd = -1;
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tmp = tmp->ai_next;
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}
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end:
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freeaddrinfo(res);
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if (fd >= 0)
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close(fd);
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return ret;
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}
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static bool verify_command(const char *cmd)
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{
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for (unsigned i = 0; i < sizeof(map) / sizeof(map[0]); i++)
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{
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if (strcmp(map[i].str, cmd) == 0)
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return true;
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}
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RARCH_ERR("Command \"%s\" is not recognized by RetroArch.\n", cmd);
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RARCH_ERR("\tValid commands:\n");
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for (unsigned i = 0; i < sizeof(map) / sizeof(map[0]); i++)
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RARCH_ERR("\t\t%s\n", map[i].str);
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return false;
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}
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bool network_cmd_send(const char *cmd_)
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{
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if (!netplay_init_network())
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return NULL;
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char *command = strdup(cmd_);
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if (!command)
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return false;
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bool old_verbose = g_extern.verbose;
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g_extern.verbose = true;
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const char *cmd = NULL;
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const char *host = NULL;
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const char *port_ = NULL;
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uint16_t port = DEFAULT_NETWORK_CMD_PORT;
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char *save;
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cmd = strtok_r(command, ":", &save);
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if (cmd)
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host = strtok_r(NULL, ":", &save);
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if (host)
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port_ = strtok_r(NULL, ":", &save);
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if (!host)
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{
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#ifdef _WIN32
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host = "127.0.0.1";
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#else
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host = "localhost";
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#endif
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}
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if (port_)
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port = strtoul(port_, NULL, 0);
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RARCH_LOG("Sending command: \"%s\" to %s:%hu\n", cmd, host, (unsigned short)port);
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bool ret = verify_command(cmd) && send_udp_packet(host, port, cmd);
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free(command);
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g_extern.verbose = old_verbose;
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return ret;
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}
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