mirror of
https://github.com/libretro/RetroArch.git
synced 2024-10-11 00:24:30 +00:00
322 lines
8.2 KiB
C
322 lines
8.2 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2016 - Daniel De Matteis
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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_private.h"
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#include "../content.h"
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bool np_get_nickname(netplay_t *netplay, int fd)
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{
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uint8_t nick_size;
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if (!socket_receive_all_blocking(fd, &nick_size, sizeof(nick_size)))
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{
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RARCH_ERR("Failed to receive nick size from host.\n");
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return false;
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}
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if (nick_size >= sizeof(netplay->other_nick))
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{
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RARCH_ERR("Invalid nick size.\n");
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return false;
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}
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if (!socket_receive_all_blocking(fd, netplay->other_nick, nick_size))
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{
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RARCH_ERR("Failed to receive nick.\n");
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return false;
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}
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return true;
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}
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bool np_send_nickname(netplay_t *netplay, int fd)
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{
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uint8_t nick_size = strlen(netplay->nick);
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if (!socket_send_all_blocking(fd, &nick_size, sizeof(nick_size)))
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{
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RARCH_ERR("Failed to send nick size.\n");
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return false;
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}
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if (!socket_send_all_blocking(fd, netplay->nick, nick_size))
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{
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RARCH_ERR("Failed to send nick.\n");
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return false;
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}
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return true;
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}
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uint32_t *np_bsv_header_generate(size_t *size, uint32_t magic)
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{
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retro_ctx_serialize_info_t serial_info;
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retro_ctx_size_info_t info;
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uint32_t *content_crc_ptr;
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size_t serialize_size, header_size;
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uint32_t *header, bsv_header[4] = {0};
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core_ctl(CORE_CTL_RETRO_SERIALIZE_SIZE, &info);
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serialize_size = info.size;
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header_size = sizeof(bsv_header) + serialize_size;
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*size = header_size;
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header = (uint32_t*)malloc(header_size);
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if (!header)
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goto error;
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content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
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bsv_header[MAGIC_INDEX] = swap_if_little32(BSV_MAGIC);
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bsv_header[SERIALIZER_INDEX] = swap_if_big32(magic);
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bsv_header[CRC_INDEX] = swap_if_big32(*content_crc_ptr);
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bsv_header[STATE_SIZE_INDEX] = swap_if_big32(serialize_size);
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serial_info.data = header + 4;
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serial_info.size = serialize_size;
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if (serialize_size && !core_ctl(CORE_CTL_RETRO_SERIALIZE, &serial_info))
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goto error;
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memcpy(header, bsv_header, sizeof(bsv_header));
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return header;
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error:
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if (header)
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free(header);
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return NULL;
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}
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bool np_bsv_parse_header(const uint32_t *header, uint32_t magic)
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{
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retro_ctx_size_info_t info;
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uint32_t *content_crc_ptr;
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uint32_t in_crc, in_magic, in_state_size;
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uint32_t in_bsv = swap_if_little32(header[MAGIC_INDEX]);
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if (in_bsv != BSV_MAGIC)
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{
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RARCH_ERR("BSV magic mismatch, got 0x%x, expected 0x%x.\n",
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in_bsv, BSV_MAGIC);
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return false;
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}
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in_magic = swap_if_big32(header[SERIALIZER_INDEX]);
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if (in_magic != magic)
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{
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RARCH_ERR("Magic mismatch, got 0x%x, expected 0x%x.\n", in_magic, magic);
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return false;
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}
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in_crc = swap_if_big32(header[CRC_INDEX]);
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content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
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if (in_crc != *content_crc_ptr)
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{
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RARCH_ERR("CRC32 mismatch, got 0x%x, expected 0x%x.\n", in_crc,
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*content_crc_ptr);
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return false;
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}
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core_ctl(CORE_CTL_RETRO_SERIALIZE_SIZE, &info);
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in_state_size = swap_if_big32(header[STATE_SIZE_INDEX]);
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if (in_state_size != info.size)
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{
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RARCH_ERR("Serialization size mismatch, got 0x%x, expected 0x%x.\n",
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(unsigned)in_state_size, (unsigned)info.size);
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return false;
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}
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return true;
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}
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/**
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* np_impl_magic:
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*
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* Not really a hash, but should be enough to differentiate
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* implementations from each other.
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*
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* Subtle differences in the implementation will not be possible to spot.
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* The alternative would have been checking serialization sizes, but it
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* was troublesome for cross platform compat.
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**/
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uint32_t np_impl_magic(void)
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{
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size_t i, len;
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retro_ctx_api_info_t api_info;
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unsigned api;
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uint32_t res = 0;
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rarch_system_info_t *info = NULL;
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const char *lib = NULL;
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const char *ver = PACKAGE_VERSION;
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core_ctl(CORE_CTL_RETRO_API_VERSION, &api_info);
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api = api_info.version;
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runloop_ctl(RUNLOOP_CTL_SYSTEM_INFO_GET, &info);
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if (info)
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lib = info->info.library_name;
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res |= api;
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len = strlen(lib);
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for (i = 0; i < len; i++)
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res ^= lib[i] << (i & 0xf);
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lib = info->info.library_version;
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len = strlen(lib);
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for (i = 0; i < len; i++)
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res ^= lib[i] << (i & 0xf);
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len = strlen(ver);
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for (i = 0; i < len; i++)
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res ^= ver[i] << ((i & 0xf) + 16);
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return res;
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}
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bool np_send_info(netplay_t *netplay)
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{
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unsigned sram_size;
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retro_ctx_memory_info_t mem_info;
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char msg[512] = {0};
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uint32_t *content_crc_ptr = NULL;
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void *sram = NULL;
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uint32_t header[3] = {0};
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mem_info.id = RETRO_MEMORY_SAVE_RAM;
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core_ctl(CORE_CTL_RETRO_GET_MEMORY, &mem_info);
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content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
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header[0] = htonl(*content_crc_ptr);
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header[1] = htonl(np_impl_magic());
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header[2] = htonl(mem_info.size);
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if (!socket_send_all_blocking(netplay->fd, header, sizeof(header)))
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return false;
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if (!np_send_nickname(netplay, netplay->fd))
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{
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RARCH_ERR("Failed to send nick to host.\n");
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return false;
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}
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/* Get SRAM data from User 1. */
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sram = mem_info.data;
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sram_size = mem_info.size;
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if (!socket_receive_all_blocking(netplay->fd, sram, sram_size))
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{
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RARCH_ERR("Failed to receive SRAM data from host.\n");
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return false;
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}
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if (!np_get_nickname(netplay, netplay->fd))
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{
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RARCH_ERR("Failed to receive nick from host.\n");
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return false;
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}
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snprintf(msg, sizeof(msg), "Connected to: \"%s\"", netplay->other_nick);
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RARCH_LOG("%s\n", msg);
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runloop_msg_queue_push(msg, 1, 180, false);
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return true;
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}
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bool np_get_info(netplay_t *netplay)
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{
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unsigned sram_size;
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uint32_t header[3];
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retro_ctx_memory_info_t mem_info;
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uint32_t *content_crc_ptr = NULL;
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const void *sram = NULL;
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if (!socket_receive_all_blocking(netplay->fd, header, sizeof(header)))
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{
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RARCH_ERR("Failed to receive header from client.\n");
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return false;
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}
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content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
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if (*content_crc_ptr != ntohl(header[0]))
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{
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RARCH_ERR("Content CRC32s differ. Cannot use different games.\n");
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return false;
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}
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if (np_impl_magic() != ntohl(header[1]))
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{
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RARCH_ERR("Implementations differ, make sure you're using exact same "
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"libretro implementations and RetroArch version.\n");
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return false;
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}
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mem_info.id = RETRO_MEMORY_SAVE_RAM;
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core_ctl(CORE_CTL_RETRO_GET_MEMORY, &mem_info);
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if (mem_info.size != ntohl(header[2]))
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{
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RARCH_ERR("Content SRAM sizes do not correspond.\n");
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return false;
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}
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if (!np_get_nickname(netplay, netplay->fd))
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{
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RARCH_ERR("Failed to get nickname from client.\n");
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return false;
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}
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/* Send SRAM data to our User 2. */
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sram = mem_info.data;
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sram_size = mem_info.size;
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if (!socket_send_all_blocking(netplay->fd, sram, sram_size))
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{
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RARCH_ERR("Failed to send SRAM data to client.\n");
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return false;
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}
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if (!np_send_nickname(netplay, netplay->fd))
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{
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RARCH_ERR("Failed to send nickname to client.\n");
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return false;
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}
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#ifndef HAVE_SOCKET_LEGACY
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np_log_connection(&netplay->other_addr, 0, netplay->other_nick);
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#endif
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return true;
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}
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bool np_is_server(netplay_t* netplay)
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{
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return netplay->is_server;
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}
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bool np_is_spectate(netplay_t* netplay)
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{
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return netplay->spectate.enabled;
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}
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