static bool netplay_send_raw_cmd(netplay_t *netplay, uint32_t cmd,
const void *data, size_t size)
{
cmd = (cmd << 16) | (size & 0xffff);
cmd = htonl(cmd);
if (!socket_send_all_blocking(netplay->fd, &cmd, sizeof(cmd)))
return false;
if (!socket_send_all_blocking(netplay->fd, data, size))
return false;
return true;
}
/**
* netplay_post_frame_spectate:
* @netplay : pointer to netplay object
*
* Post-frame for Netplay (spectate mode version).
* We check if we have new input and replay from recorded input.
**/
static void netplay_post_frame_spectate(netplay_t *netplay)
{
unsigned i;
if (netplay->spectate_client)
return;
for (i = 0; i < MAX_SPECTATORS; i++)
{
char msg[PATH_MAX_LENGTH] = {0};
if (netplay->spectate_fds[i] == -1)
continue;
if (socket_send_all_blocking(netplay->spectate_fds[i],
netplay->spectate_input,
netplay->spectate_input_ptr * sizeof(int16_t)))
continue;
RARCH_LOG("Client (#%u) disconnected ...\n", i);
snprintf(msg, sizeof(msg), "Client (#%u) disconnected.", i);
rarch_main_msg_queue_push(msg, 1, 180, false);
socket_close(netplay->spectate_fds[i]);
netplay->spectate_fds[i] = -1;
break;
}
netplay->spectate_input_ptr = 0;
}
/**
* netplay_post_frame_spectate:
* @netplay : pointer to netplay object
*
* Post-frame for Netplay (spectate mode version).
* We check if we have new input and replay from recorded input.
**/
static void netplay_spectate_post_frame(netplay_t *netplay)
{
unsigned i;
if (!np_is_server(netplay))
return;
for (i = 0; i < MAX_SPECTATORS; i++)
{
char msg[128];
if (netplay->spectate.fds[i] == -1)
continue;
if (socket_send_all_blocking(netplay->spectate.fds[i],
netplay->spectate.input,
netplay->spectate.input_ptr * sizeof(int16_t)))
continue;
RARCH_LOG("Client (#%u) disconnected ...\n", i);
snprintf(msg, sizeof(msg), "Client (#%u) disconnected.", i);
runloop_msg_queue_push(msg, 1, 180, false);
socket_close(netplay->spectate.fds[i]);
netplay->spectate.fds[i] = -1;
break;
}
netplay->spectate.input_ptr = 0;
}
bool np_get_info(netplay_t *netplay)
{
unsigned sram_size;
uint32_t header[3];
const void *sram = NULL;
global_t *global = global_get_ptr();
if (!socket_receive_all_blocking(netplay->fd, header, sizeof(header)))
{
RARCH_ERR("Failed to receive header from client.\n");
return false;
}
if (global->content_crc != ntohl(header[0]))
{
RARCH_ERR("Content CRC32s differ. Cannot use different games.\n");
return false;
}
if (np_impl_magic() != ntohl(header[1]))
{
RARCH_ERR("Implementations differ, make sure you're using exact same libretro implementations and RetroArch version.\n");
return false;
}
if (core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM) != ntohl(header[2]))
{
RARCH_ERR("Content SRAM sizes do not correspond.\n");
return false;
}
if (!np_get_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to get nickname from client.\n");
return false;
}
/* Send SRAM data to our User 2. */
sram = core.retro_get_memory_data(RETRO_MEMORY_SAVE_RAM);
sram_size = core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
if (!socket_send_all_blocking(netplay->fd, sram, sram_size))
{
RARCH_ERR("Failed to send SRAM data to client.\n");
return false;
}
if (!np_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to send nickname to client.\n");
return false;
}
#ifndef HAVE_SOCKET_LEGACY
np_log_connection(&netplay->other_addr, 0, netplay->other_nick);
#endif
return true;
}
static bool netplay_send_raw_cmd(netplay_t *netplay, uint32_t cmd,
const void *data, size_t size)
{
uint32_t cmdbuf[2];
cmdbuf[0] = htonl(cmd);
cmdbuf[1] = htonl(size);
if (!socket_send_all_blocking(netplay->fd, cmdbuf, sizeof(cmdbuf), false))
return false;
if (size > 0)
if (!socket_send_all_blocking(netplay->fd, data, size, false))
return false;
return true;
}
static void net_http_send_str(int fd, bool *error, const char *text)
{
if (*error)
return;
if (!socket_send_all_blocking(fd, text, strlen(text), true))
*error = true;
}
bool np_send_nickname(netplay_t *netplay, int fd)
{
uint8_t nick_size = strlen(netplay->nick);
if (!socket_send_all_blocking(fd, &nick_size, sizeof(nick_size)))
{
RARCH_ERR("Failed to send nick size.\n");
return false;
}
if (!socket_send_all_blocking(fd, netplay->nick, nick_size))
{
RARCH_ERR("Failed to send nick.\n");
return false;
}
return true;
}
bool netplay_send_nickname(netplay_t *netplay, int fd)
{
uint8_t nick_size = strlen(netplay->nick);
if (!socket_send_all_blocking(fd, &nick_size, sizeof(nick_size), false))
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_FAILED_TO_SEND_NICKNAME_SIZE));
return false;
}
if (!socket_send_all_blocking(fd, netplay->nick, nick_size, false))
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_FAILED_TO_SEND_NICKNAME));
return false;
}
return true;
}
bool netplay_send_info(netplay_t *netplay)
{
unsigned sram_size;
retro_ctx_memory_info_t mem_info;
char msg[512] = {0};
uint32_t *content_crc_ptr = NULL;
void *sram = NULL;
uint32_t header[3] = {0};
mem_info.id = RETRO_MEMORY_SAVE_RAM;
core_get_memory(&mem_info);
content_get_crc(&content_crc_ptr);
header[0] = htonl(*content_crc_ptr);
header[1] = htonl(netplay_impl_magic());
header[2] = htonl(mem_info.size);
if (!socket_send_all_blocking(netplay->fd, header, sizeof(header), false))
return false;
if (!netplay_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_SEND_NICKNAME_TO_HOST));
return false;
}
/* Get SRAM data from User 1. */
sram = mem_info.data;
sram_size = mem_info.size;
if (!socket_receive_all_blocking(netplay->fd, sram, sram_size))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_RECEIVE_SRAM_DATA_FROM_HOST));
return false;
}
if (!netplay_get_nickname(netplay, netplay->fd))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_RECEIVE_NICKNAME_FROM_HOST));
return false;
}
snprintf(msg, sizeof(msg), "%s: \"%s\"",
msg_hash_to_str(MSG_CONNECTED_TO),
netplay->other_nick);
RARCH_LOG("%s\n", msg);
runloop_msg_queue_push(msg, 1, 180, false);
return true;
}
bool np_send_info(netplay_t *netplay)
{
unsigned sram_size;
retro_ctx_memory_info_t mem_info;
char msg[512] = {0};
uint32_t *content_crc_ptr = NULL;
void *sram = NULL;
uint32_t header[3] = {0};
mem_info.id = RETRO_MEMORY_SAVE_RAM;
core_ctl(CORE_CTL_RETRO_GET_MEMORY, &mem_info);
content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
header[0] = htonl(*content_crc_ptr);
header[1] = htonl(np_impl_magic());
header[2] = htonl(mem_info.size);
if (!socket_send_all_blocking(netplay->fd, header, sizeof(header)))
return false;
if (!np_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to send nick to host.\n");
return false;
}
/* Get SRAM data from User 1. */
sram = mem_info.data;
sram_size = mem_info.size;
if (!socket_receive_all_blocking(netplay->fd, sram, sram_size))
{
RARCH_ERR("Failed to receive SRAM data from host.\n");
return false;
}
if (!np_get_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to receive nick from host.\n");
return false;
}
snprintf(msg, sizeof(msg), "Connected to: \"%s\"", netplay->other_nick);
RARCH_LOG("%s\n", msg);
runloop_msg_queue_push(msg, 1, 180, false);
return true;
}
static void net_http_send_str(struct http_socket_state_t *sock_state, bool *error, const char *text)
{
if (*error)
return;
#ifdef HAVE_SSL
if (sock_state->ssl)
{
if (!ssl_socket_send_all_blocking(sock_state->ssl_ctx, text, strlen(text), true))
*error = true;
}
else
#endif
{
if (!socket_send_all_blocking(sock_state->fd, text, strlen(text), true))
*error = true;
}
}
bool np_send_info(netplay_t *netplay)
{
unsigned sram_size;
char msg[512] = {0};
void *sram = NULL;
uint32_t header[3] = {0};
global_t *global = global_get_ptr();
header[0] = htonl(global->content_crc);
header[1] = htonl(np_impl_magic());
header[2] = htonl(core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM));
if (!socket_send_all_blocking(netplay->fd, header, sizeof(header)))
return false;
if (!np_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to send nick to host.\n");
return false;
}
/* Get SRAM data from User 1. */
sram = core.retro_get_memory_data(RETRO_MEMORY_SAVE_RAM);
sram_size = core.retro_get_memory_size(RETRO_MEMORY_SAVE_RAM);
if (!socket_receive_all_blocking(netplay->fd, sram, sram_size))
{
RARCH_ERR("Failed to receive SRAM data from host.\n");
return false;
}
if (!np_get_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to receive nick from host.\n");
return false;
}
snprintf(msg, sizeof(msg), "Connected to: \"%s\"", netplay->other_nick);
RARCH_LOG("%s\n", msg);
runloop_msg_queue_push(msg, 1, 180, false);
return true;
}
/**
* netplay_send
*
* Queue the given data for sending.
*/
bool netplay_send(struct socket_buffer *sbuf, int sockfd, const void *buf,
size_t len)
{
if (buf_remaining(sbuf) < len)
{
/* Need to force a blocking send */
if (!netplay_send_flush(sbuf, sockfd, true))
return false;
}
if (buf_remaining(sbuf) < len)
{
/* Can only be that this is simply too big for our buffer, in which case
* we just need to do a blocking send */
if (!socket_send_all_blocking(sockfd, buf, len, false))
return false;
return true;
}
/* Copy it into our buffer */
if (sbuf->bufsz - sbuf->end < len)
{
/* Half at a time */
size_t chunka = sbuf->bufsz - sbuf->end,
chunkb = len - chunka;
memcpy(sbuf->data + sbuf->end, buf, chunka);
memcpy(sbuf->data, (const unsigned char *) buf + chunka, chunkb);
sbuf->end = chunkb;
}
else
{
/* Straight in */
memcpy(sbuf->data + sbuf->end, buf, len);
sbuf->end += len;
}
/* Flush what we can immediately */
return netplay_send_flush(sbuf, sockfd, false);
}
/**
* get_self_input_state:
* @netplay : pointer to netplay object
*
* Grab our own input state and send this over the network.
*
* Returns: true (1) if successful, otherwise false (0).
**/
static bool get_self_input_state(netplay_t *netplay)
{
uint32_t state[WORDS_PER_FRAME - 1] = {0, 0, 0};
struct delta_frame *ptr = &netplay->buffer[netplay->self_ptr];
if (!netplay_delta_frame_ready(netplay, ptr, netplay->self_frame_count))
return false;
if (ptr->have_local)
{
/* We've already read this frame! */
return true;
}
if (!input_driver_is_libretro_input_blocked() && netplay->self_frame_count > 0)
{
unsigned i;
settings_t *settings = config_get_ptr();
/* First frame we always give zero input since relying on
* input from first frame screws up when we use -F 0. */
retro_input_state_t cb = netplay->cbs.state_cb;
for (i = 0; i < RARCH_FIRST_CUSTOM_BIND; i++)
{
int16_t tmp = cb(settings->netplay.swap_input ?
0 : !netplay->port,
RETRO_DEVICE_JOYPAD, 0, i);
state[0] |= tmp ? 1 << i : 0;
}
for (i = 0; i < 2; i++)
{
int16_t tmp_x = cb(settings->netplay.swap_input ?
0 : !netplay->port,
RETRO_DEVICE_ANALOG, i, 0);
int16_t tmp_y = cb(settings->netplay.swap_input ?
0 : !netplay->port,
RETRO_DEVICE_ANALOG, i, 1);
state[1 + i] = (uint16_t)tmp_x | (((uint16_t)tmp_y) << 16);
}
}
/* Here we construct the payload format:
* frame {
* uint32_t frame_number
* uint32_t RETRO_DEVICE_JOYPAD state (top 16 bits zero)
* uint32_t ANALOG state[0]
* uint32_t ANALOG state[1]
* }
*
* payload {
* cmd (CMD_INPUT)
* cmd_size (4 words)
* frame
* }
*/
netplay->packet_buffer[0] = htonl(NETPLAY_CMD_INPUT);
netplay->packet_buffer[1] = htonl(WORDS_PER_FRAME * sizeof(uint32_t));
netplay->packet_buffer[2] = htonl(netplay->self_frame_count);
netplay->packet_buffer[3] = htonl(state[0]);
netplay->packet_buffer[4] = htonl(state[1]);
netplay->packet_buffer[5] = htonl(state[2]);
if (!netplay->spectate.enabled) /* Spectate sends in its own way */
{
if (!socket_send_all_blocking(netplay->fd,
netplay->packet_buffer, sizeof(netplay->packet_buffer), false))
{
hangup(netplay);
return false;
}
}
memcpy(ptr->self_state, state, sizeof(state));
ptr->have_local = true;
return true;
}
/**
* netplay_load_savestate
* @netplay : pointer to netplay object
* @serial_info : the savestate being loaded, NULL means "load it yourself"
* @save : whether to save the provided serial_info into the frame buffer
*
* Inform Netplay of a savestate load and send it to the other side
**/
void netplay_load_savestate(netplay_t *netplay, retro_ctx_serialize_info_t *serial_info, bool save)
{
uint32_t header[3];
retro_ctx_serialize_info_t tmp_serial_info;
if (!netplay->has_connection)
return;
/* Record it in our own buffer */
if (save || !serial_info)
{
if (netplay_delta_frame_ready(netplay,
&netplay->buffer[netplay->self_ptr], netplay->self_frame_count))
{
if (!serial_info)
{
tmp_serial_info.size = netplay->state_size;
tmp_serial_info.data = netplay->buffer[netplay->self_ptr].state;
if (!core_serialize(&tmp_serial_info))
return;
tmp_serial_info.data_const = tmp_serial_info.data;
serial_info = &tmp_serial_info;
}
else
{
if (serial_info->size <= netplay->state_size)
{
memcpy(netplay->buffer[netplay->self_ptr].state,
serial_info->data_const, serial_info->size);
}
}
}
}
/* We need to ignore any intervening data from the other side, and never rewind past this */
if (netplay->read_frame_count < netplay->self_frame_count)
{
netplay->read_ptr = netplay->self_ptr;
netplay->read_frame_count = netplay->self_frame_count;
}
if (netplay->other_frame_count < netplay->self_frame_count)
{
netplay->other_ptr = netplay->self_ptr;
netplay->other_frame_count = netplay->self_frame_count;
}
/* If we can't send it to the peer, loading a state was a bad idea */
if (netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION))
return;
/* And send it to the peer (FIXME: this is an ugly way to do this) */
header[0] = htonl(NETPLAY_CMD_LOAD_SAVESTATE);
header[1] = htonl(serial_info->size + sizeof(uint32_t));
header[2] = htonl(netplay->self_frame_count);
if (!socket_send_all_blocking(netplay->fd, header, sizeof(header), false))
{
hangup(netplay);
return;
}
if (!socket_send_all_blocking(netplay->fd, serial_info->data_const, serial_info->size, false))
{
hangup(netplay);
return;
}
}
static bool netplay_cmd_nak(netplay_t *netplay)
{
uint32_t cmd = htonl(NETPLAY_CMD_NAK);
return socket_send_all_blocking(netplay->fd, &cmd, sizeof(cmd));
}
/**
* netplay_send_flush
*
* Flush unsent data in the given socket buffer, blocking to do so if
* requested.
*
* Returns false only on socket failures, true otherwise.
*/
bool netplay_send_flush(struct socket_buffer *sbuf, int sockfd, bool block)
{
ssize_t sent;
if (buf_used(sbuf) == 0)
return true;
if (sbuf->end > sbuf->start)
{
/* Usual case: Everything's in order */
if (block)
{
if (!socket_send_all_blocking(sockfd, sbuf->data + sbuf->start, buf_used(sbuf), false))
return false;
sbuf->start = sbuf->end = 0;
}
else
{
sent = socket_send_all_nonblocking(sockfd, sbuf->data + sbuf->start, buf_used(sbuf), false);
if (sent < 0)
return false;
sbuf->start += sent;
if (sbuf->start == sbuf->end)
sbuf->start = sbuf->end = 0;
}
}
else
{
/* Unusual case: Buffer overlaps break */
if (block)
{
if (!socket_send_all_blocking(sockfd, sbuf->data + sbuf->start, sbuf->bufsz - sbuf->start, false))
return false;
sbuf->start = 0;
return netplay_send_flush(sbuf, sockfd, true);
}
else
{
sent = socket_send_all_nonblocking(sockfd, sbuf->data + sbuf->start, sbuf->bufsz - sbuf->start, false);
if (sent < 0)
return false;
sbuf->start += sent;
if (sbuf->start >= sbuf->bufsz)
{
sbuf->start = 0;
return netplay_send_flush(sbuf, sockfd, false);
}
}
}
return true;
}
/**
* netplay_pre_frame_spectate:
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay (spectate mode version).
**/
static void netplay_spectate_pre_frame(netplay_t *netplay)
{
unsigned i;
uint32_t *header;
int new_fd, idx, bufsize;
size_t header_size;
struct sockaddr_storage their_addr;
socklen_t addr_size;
fd_set fds;
struct timeval tmp_tv = {0};
if (!np_is_server(netplay))
return;
FD_ZERO(&fds);
FD_SET(netplay->fd, &fds);
if (socket_select(netplay->fd + 1, &fds, NULL, NULL, &tmp_tv) <= 0)
return;
if (!FD_ISSET(netplay->fd, &fds))
return;
addr_size = sizeof(their_addr);
new_fd = accept(netplay->fd, (struct sockaddr*)&their_addr, &addr_size);
if (new_fd < 0)
{
RARCH_ERR("Failed to accept incoming spectator.\n");
return;
}
idx = -1;
for (i = 0; i < MAX_SPECTATORS; i++)
{
if (netplay->spectate.fds[i] == -1)
{
idx = i;
break;
}
}
/* No vacant client streams :( */
if (idx == -1)
{
socket_close(new_fd);
return;
}
if (!np_get_nickname(netplay, new_fd))
{
RARCH_ERR("Failed to get nickname from client.\n");
socket_close(new_fd);
return;
}
if (!np_send_nickname(netplay, new_fd))
{
RARCH_ERR("Failed to send nickname to client.\n");
socket_close(new_fd);
return;
}
header = np_bsv_header_generate(&header_size,
np_impl_magic());
if (!header)
{
RARCH_ERR("Failed to generate BSV header.\n");
socket_close(new_fd);
return;
}
bufsize = header_size;
setsockopt(new_fd, SOL_SOCKET, SO_SNDBUF, (const char*)&bufsize,
sizeof(int));
if (!socket_send_all_blocking(new_fd, header, header_size))
{
RARCH_ERR("Failed to send header to client.\n");
socket_close(new_fd);
free(header);
return;
}
free(header);
netplay->spectate.fds[idx] = new_fd;
#ifndef HAVE_SOCKET_LEGACY
np_log_connection(&their_addr, idx, netplay->other_nick);
#endif
}
bool netplay_get_info(netplay_t *netplay)
{
unsigned sram_size;
uint32_t header[3];
retro_ctx_memory_info_t mem_info;
uint32_t *content_crc_ptr = NULL;
const void *sram = NULL;
if (!socket_receive_all_blocking(netplay->fd, header, sizeof(header)))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_RECEIVE_HEADER_FROM_CLIENT));
return false;
}
content_get_crc(&content_crc_ptr);
if (*content_crc_ptr != ntohl(header[0]))
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_CONTENT_CRC32S_DIFFER));
return false;
}
if (netplay_impl_magic() != ntohl(header[1]))
{
RARCH_ERR("Implementations differ, make sure you're using exact same "
"libretro implementations and RetroArch version.\n");
return false;
}
mem_info.id = RETRO_MEMORY_SAVE_RAM;
core_get_memory(&mem_info);
if (mem_info.size != ntohl(header[2]))
{
RARCH_ERR("Content SRAM sizes do not correspond.\n");
return false;
}
if (!netplay_get_nickname(netplay, netplay->fd))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_GET_NICKNAME_FROM_CLIENT));
return false;
}
/* Send SRAM data to our User 2. */
sram = mem_info.data;
sram_size = mem_info.size;
if (!socket_send_all_blocking(netplay->fd, sram, sram_size, false))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_SEND_SRAM_DATA_TO_CLIENT));
return false;
}
if (!netplay_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_SEND_NICKNAME_TO_CLIENT));
return false;
}
#ifndef HAVE_SOCKET_LEGACY
netplay_log_connection(&netplay->other_addr, 0, netplay->other_nick);
#endif
return true;
}
bool np_get_info(netplay_t *netplay)
{
unsigned sram_size;
uint32_t header[3];
retro_ctx_memory_info_t mem_info;
uint32_t *content_crc_ptr = NULL;
const void *sram = NULL;
if (!socket_receive_all_blocking(netplay->fd, header, sizeof(header)))
{
RARCH_ERR("Failed to receive header from client.\n");
return false;
}
content_ctl(CONTENT_CTL_GET_CRC, &content_crc_ptr);
if (*content_crc_ptr != ntohl(header[0]))
{
RARCH_ERR("Content CRC32s differ. Cannot use different games.\n");
return false;
}
if (np_impl_magic() != ntohl(header[1]))
{
RARCH_ERR("Implementations differ, make sure you're using exact same "
"libretro implementations and RetroArch version.\n");
return false;
}
mem_info.id = RETRO_MEMORY_SAVE_RAM;
core_ctl(CORE_CTL_RETRO_GET_MEMORY, &mem_info);
if (mem_info.size != ntohl(header[2]))
{
RARCH_ERR("Content SRAM sizes do not correspond.\n");
return false;
}
if (!np_get_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to get nickname from client.\n");
return false;
}
/* Send SRAM data to our User 2. */
sram = mem_info.data;
sram_size = mem_info.size;
if (!socket_send_all_blocking(netplay->fd, sram, sram_size))
{
RARCH_ERR("Failed to send SRAM data to client.\n");
return false;
}
if (!np_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("Failed to send nickname to client.\n");
return false;
}
#ifndef HAVE_SOCKET_LEGACY
np_log_connection(&netplay->other_addr, 0, netplay->other_nick);
#endif
return true;
}
bool netplay_handshake(netplay_t *netplay)
{
size_t i;
uint32_t local_pmagic, remote_pmagic;
unsigned sram_size, remote_sram_size;
retro_ctx_memory_info_t mem_info;
char msg[512];
uint32_t *content_crc_ptr = NULL;
void *sram = NULL;
uint32_t header[5] = {0};
bool is_server = netplay->is_server;
int compression = 0;
msg[0] = '\0';
mem_info.id = RETRO_MEMORY_SAVE_RAM;
core_get_memory(&mem_info);
content_get_crc(&content_crc_ptr);
local_pmagic = netplay_platform_magic();
header[0] = htonl(*content_crc_ptr);
header[1] = htonl(netplay_impl_magic());
header[2] = htonl(mem_info.size);
header[3] = htonl(local_pmagic);
header[4] = htonl(NETPLAY_COMPRESSION_SUPPORTED);
if (!socket_send_all_blocking(netplay->fd, header, sizeof(header), false))
return false;
if (!socket_receive_all_blocking(netplay->fd, header, sizeof(header)))
{
strlcpy(msg, msg_hash_to_str(MSG_FAILED_TO_RECEIVE_HEADER_FROM_CLIENT), sizeof(msg));
goto error;
}
if (*content_crc_ptr != ntohl(header[0]))
{
strlcpy(msg, msg_hash_to_str(MSG_CONTENT_CRC32S_DIFFER), sizeof(msg));
goto error;
}
if (netplay_impl_magic() != ntohl(header[1]))
{
strlcpy(msg, "Implementations differ. Make sure you're using exact same "
"libretro implementations and RetroArch version.", sizeof(msg));
goto error;
}
/* Some cores only report the correct sram size late, so we can't actually
* error out if the sram size seems wrong. */
sram_size = mem_info.size;
remote_sram_size = ntohl(header[2]);
if (sram_size != 0 && remote_sram_size != 0 && sram_size != remote_sram_size)
{
RARCH_WARN("Content SRAM sizes do not correspond.\n");
}
/* We only care about platform magic if our core is quirky */
remote_pmagic = ntohl(header[3]);
if ((netplay->quirks & NETPLAY_QUIRK_ENDIAN_DEPENDENT) &&
netplay_endian_mismatch(local_pmagic, remote_pmagic))
{
RARCH_ERR("Endianness mismatch with an endian-sensitive core.\n");
strlcpy(msg, "This core does not support inter-architecture netplay "
"between these systems.", sizeof(msg));
goto error;
}
if ((netplay->quirks & NETPLAY_QUIRK_PLATFORM_DEPENDENT) &&
(local_pmagic != remote_pmagic))
{
RARCH_ERR("Platform mismatch with a platform-sensitive core.\n");
strlcpy(msg, "This core does not support inter-architecture netplay.",
sizeof(msg));
goto error;
}
/* Clear any existing compression */
if (netplay->compression_stream)
netplay->compression_backend->stream_free(netplay->compression_stream);
if (netplay->decompression_stream)
netplay->decompression_backend->stream_free(netplay->decompression_stream);
/* Check what compression is supported */
compression = ntohl(header[4]);
compression &= NETPLAY_COMPRESSION_SUPPORTED;
if (compression & NETPLAY_COMPRESSION_ZLIB)
{
netplay->compression_backend = trans_stream_get_zlib_deflate_backend();
if (!netplay->compression_backend)
netplay->compression_backend = trans_stream_get_pipe_backend();
}
else
{
netplay->compression_backend = trans_stream_get_pipe_backend();
}
netplay->decompression_backend = netplay->compression_backend->reverse;
/* Allocate our compression stream */
netplay->compression_stream = netplay->compression_backend->stream_new();
netplay->decompression_stream = netplay->decompression_backend->stream_new();
if (!netplay->compression_stream || !netplay->decompression_stream)
{
RARCH_ERR("Failed to allocate compression transcoder!\n");
return false;
}
/* Client sends nickname first, server replies with nickname */
if (!is_server)
{
if (!netplay_send_nickname(netplay, netplay->fd))
{
strlcpy(msg, msg_hash_to_str(MSG_FAILED_TO_SEND_NICKNAME_TO_HOST),
sizeof(msg));
goto error;
}
}
if (!netplay_get_nickname(netplay, netplay->fd))
{
if (is_server)
strlcpy(msg, msg_hash_to_str(MSG_FAILED_TO_GET_NICKNAME_FROM_CLIENT),
sizeof(msg));
else
strlcpy(msg,
msg_hash_to_str(MSG_FAILED_TO_RECEIVE_NICKNAME_FROM_HOST),
sizeof(msg));
goto error;
}
if (is_server)
{
if (!netplay_send_nickname(netplay, netplay->fd))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_SEND_NICKNAME_TO_CLIENT));
return false;
}
}
/* Server sends SRAM, client receives */
if (is_server)
{
/* Send SRAM data to the client */
sram = mem_info.data;
if (!socket_send_all_blocking(netplay->fd, sram, sram_size, false))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_SEND_SRAM_DATA_TO_CLIENT));
return false;
}
}
else
{
/* Get SRAM data from User 1. */
if (sram_size != 0 && sram_size == remote_sram_size)
{
sram = mem_info.data;
if (!socket_receive_all_blocking(netplay->fd, sram, sram_size))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_RECEIVE_SRAM_DATA_FROM_HOST));
return false;
}
}
else if (remote_sram_size != 0)
{
/* We can't load this, but we still need to get rid of the data */
uint32_t quickbuf;
while (remote_sram_size > 0)
{
if (!socket_receive_all_blocking(netplay->fd, &quickbuf, (remote_sram_size > sizeof(uint32_t)) ? sizeof(uint32_t) : remote_sram_size))
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_RECEIVE_SRAM_DATA_FROM_HOST));
return false;
}
if (remote_sram_size > sizeof(uint32_t))
remote_sram_size -= sizeof(uint32_t);
else
remote_sram_size = 0;
}
}
}
/* Reset our frame count so it's consistent with the server */
netplay->self_frame_count = netplay->other_frame_count = 0;
netplay->read_frame_count = 1;
for (i = 0; i < netplay->buffer_size; i++)
{
netplay->buffer[i].used = false;
if (i == netplay->self_ptr)
{
netplay_delta_frame_ready(netplay, &netplay->buffer[i], 0);
netplay->buffer[i].have_remote = true;
netplay->other_ptr = i;
netplay->read_ptr = NEXT_PTR(i);
}
else
{
netplay->buffer[i].used = false;
}
}
if (is_server)
{
netplay_log_connection(&netplay->other_addr, 0, netplay->other_nick);
}
else
{
snprintf(msg, sizeof(msg), "%s: \"%s\"",
msg_hash_to_str(MSG_CONNECTED_TO),
netplay->other_nick);
RARCH_LOG("%s\n", msg);
runloop_msg_queue_push(msg, 1, 180, false);
}
return true;
error:
if (msg[0])
{
RARCH_ERR("%s\n", msg);
runloop_msg_queue_push(msg, 1, 180, false);
}
return false;
}