static void network_cmd_poll(rarch_cmd_t *handle)
{
fd_set fds;
struct timeval tmp_tv = {0};
if (handle->net_fd < 0)
return;
FD_ZERO(&fds);
FD_SET(handle->net_fd, &fds);
if (socket_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);
}
}
/*-------------------------------------------------------------------------*\
* Waits for a set of sockets until a condition is met or timeout.
\*-------------------------------------------------------------------------*/
static int global_select(lua_State *L) {
int rtab, wtab, itab, ret, ndirty;
t_socket max_fd;
fd_set rset, wset;
t_timeout tm;
double t = luaL_optnumber(L, 3, -1);
FD_ZERO(&rset); FD_ZERO(&wset);
lua_settop(L, 3);
lua_newtable(L); itab = lua_gettop(L);
lua_newtable(L); rtab = lua_gettop(L);
lua_newtable(L); wtab = lua_gettop(L);
max_fd = collect_fd(L, 1, SOCKET_INVALID, itab, &rset);
ndirty = check_dirty(L, 1, rtab, &rset);
t = ndirty > 0? 0.0: t;
timeout_init(&tm, t, -1);
timeout_markstart(&tm);
max_fd = collect_fd(L, 2, max_fd, itab, &wset);
ret = socket_select(max_fd+1, &rset, &wset, NULL, &tm);
if (ret > 0 || ndirty > 0) {
return_fd(L, &rset, max_fd+1, itab, rtab, ndirty);
return_fd(L, &wset, max_fd+1, itab, wtab, 0);
make_assoc(L, rtab);
make_assoc(L, wtab);
return 2;
} else if (ret == 0) {
lua_pushstring(L, "timeout");
return 3;
} else {
lua_pushstring(L, "error");
return 3;
}
}
char *http_get_status_code( int socket, int timeout )
{
char *result = NULL;
if( socket_select( socket, timeout ) == 0 )
{
return result;
}
int buffer_length = 24;
char *buffer = ( char * )malloc( buffer_length );
if( socket_receive( socket, buffer, buffer_length ) != buffer_length )
{
free( buffer );
return result;
}
result = ( char * )malloc( 4 );
memcpy( result, buffer + 9, 3 );
*( result + 3 ) = '\0';
while( socket_receive( socket, buffer, buffer_length ) == buffer_length );
free( buffer );
return result;
}
void socket_buf_clear(UDM_CONN *connp){
char buf[1024];
int len;
do {
if (socket_select(connp, 0, 'r')==-1)
return;
len = recv(connp->conn_fd, buf, 1024,0);
}while(len > 0);
}
static int poll_input(netplay_t *netplay, bool block)
{
bool had_input = false;
int max_fd = netplay->fd + 1;
struct timeval tv = {0};
tv.tv_sec = 0;
tv.tv_usec = block ? (RETRY_MS * 1000) : 0;
do
{
fd_set fds;
/* select() does not take pointer to const struct timeval.
* Technically possible for select() to modify tmp_tv, so
* we go paranoia mode. */
struct timeval tmp_tv = tv;
had_input = false;
netplay->timeout_cnt++;
FD_ZERO(&fds);
FD_SET(netplay->fd, &fds);
if (socket_select(max_fd, &fds, NULL, NULL, &tmp_tv) < 0)
return -1;
if (FD_ISSET(netplay->fd, &fds))
{
/* If we're not ready for input, wait until we are.
* Could fill the TCP buffer, stalling the other side. */
if (netplay_delta_frame_ready(netplay,
&netplay->buffer[netplay->read_ptr],
netplay->read_frame_count))
{
had_input = true;
if (!netplay_get_cmd(netplay))
return -1;
}
}
/* If we were blocked for input, pass if we have this frame's input */
if (block && netplay->read_frame_count > netplay->self_frame_count)
break;
/* If we had input, we might have more */
if (had_input || !block)
continue;
RARCH_LOG("Network is stalling at frame %u, count %u of %d ...\n",
netplay->self_frame_count, netplay->timeout_cnt, MAX_RETRIES);
if (netplay->timeout_cnt >= MAX_RETRIES && !netplay->remote_paused)
return -1;
} while (had_input || block);
return 0;
}
int socket_write(DPS_CONN *connp, const char *buf){
if (socket_select(connp, DPS_NET_READ_TIMEOUT, 'w') == -1)
return -1;
if (DpsSend(connp->conn_fd, buf, dps_strlen(buf), 0) == -1){
connp->err = DPS_NET_ERROR;
return -1;
}
return 0;
}
int socket_write(UDM_CONN *connp, const char *buf){
if (socket_select(connp, UDM_NET_READ_TIMEOUT, 'w') == -1)
return -1;
if (UdmSend(connp->conn_fd, buf, strlen(buf), 0) == -1){
connp->err = UDM_NET_ERROR;
return -1;
}
return 0;
}
static int poll_input(netplay_t *netplay, bool block)
{
int max_fd = (netplay->fd > netplay->udp_fd ?
netplay->fd : netplay->udp_fd) + 1;
struct timeval tv = {0};
tv.tv_sec = 0;
tv.tv_usec = block ? (RETRY_MS * 1000) : 0;
do
{
fd_set fds;
/* select() does not take pointer to const struct timeval.
* Technically possible for select() to modify tmp_tv, so
* we go paranoia mode. */
struct timeval tmp_tv = tv;
netplay->timeout_cnt++;
FD_ZERO(&fds);
FD_SET(netplay->udp_fd, &fds);
FD_SET(netplay->fd, &fds);
if (socket_select(max_fd, &fds, NULL, NULL, &tmp_tv) < 0)
return -1;
/* Somewhat hacky,
* but we aren't using the TCP connection for anything useful atm. */
if (FD_ISSET(netplay->fd, &fds) && !netplay_get_cmd(netplay))
return -1;
if (FD_ISSET(netplay->udp_fd, &fds))
return 1;
if (!block)
continue;
if (!send_chunk(netplay))
{
warn_hangup();
netplay->has_connection = false;
return -1;
}
RARCH_LOG("Network is stalling, resending packet... Count %u of %d ...\n",
netplay->timeout_cnt, MAX_RETRIES);
} while ((netplay->timeout_cnt < MAX_RETRIES) && block);
if (block)
return -1;
return 0;
}
int socket_read( DPS_CONN *connp, size_t maxsize){
int num_read;
size_t num_read_total;
time_t t;
num_read_total = 0;
if (connp->buf)
DPS_FREE(connp->buf);
connp->buf_len_total = 0;
connp->buf_len = 0;
connp->err = 0;
t = time(NULL);
do {
if (socket_select(connp, connp->timeout, 'r') == -1){
return -1;
}
if (connp->buf_len_total <= num_read_total+DPS_NET_BUF_SIZE){
connp->buf_len_total += DPS_NET_BUF_SIZE;
connp->buf = DpsXrealloc(connp->buf, (size_t)(connp->buf_len_total+1));
if (connp->buf == NULL) return -1;
}
/* num_read = recv(connp->conn_fd, connp->buf + num_read_total,
(DPS_NET_BUF_SIZE <= maxsize - num_read_total) ? DPS_NET_BUF_SIZE : (maxsize - num_read_total),
0);*/
num_read = read(connp->conn_fd, connp->buf + num_read_total,
(DPS_NET_BUF_SIZE <= maxsize - num_read_total) ? DPS_NET_BUF_SIZE : (maxsize - num_read_total)
);
num_read_total += num_read;
if (num_read < 0){
connp->err = DPS_NET_ERROR;
return -1;
}else if (num_read == 0) {
if ((size_t)(time(NULL) - t) > connp->timeout) break;
} else t = time(NULL);
if (num_read_total >=maxsize ){
connp->err = DPS_NET_FILE_TL;
break;
}
}while (num_read!=0);
connp->buf_len = num_read_total;
return num_read_total;
}
static int global_select(lua_State *L, const sigset_t* mask, int sigreceived) {
int rtab, wtab, etab, itab, ret, ndirty;
t_socket max_fd;
fd_set rset, wset, eset;
t_timeout tm;
double t = luaL_optnumber(L, 4, -1);
FD_ZERO(&rset); FD_ZERO(&wset); FD_ZERO(&eset);
lua_settop(L, 4);
lua_newtable(L); itab = lua_gettop(L);
lua_newtable(L); rtab = lua_gettop(L);
lua_newtable(L); wtab = lua_gettop(L);
lua_newtable(L); etab = lua_gettop(L);
max_fd = collect_fd(L, 1, SOCKET_INVALID, itab, &rset);
ndirty = check_dirty(L, 1, rtab, &rset);
t = ndirty > 0? 0.0: t;
timeout_init(&tm, t, -1);
timeout_markstart(&tm);
max_fd = collect_fd(L, 2, max_fd, itab, &wset);
max_fd = collect_fd(L, 3, max_fd, itab, &eset);
//printf("+enter select\n");
if (sigreceived) {
ret = -1;
} else {
ret = socket_select(max_fd+1, &rset, &wset, &eset, &tm, mask);
}
//printf("+exit select\n");
if (ret > 0 || ndirty > 0) {
return_fd(L, &rset, max_fd+1, itab, rtab, ndirty);
return_fd(L, &wset, max_fd+1, itab, wtab, 0);
return_fd(L, &eset, max_fd+1, itab, etab, 0);
make_assoc(L, rtab);
make_assoc(L, wtab);
make_assoc(L, etab);
return 3; //3 values pushed: 3 result tables
} else if (ret == 0) {
lua_pushstring(L, "timeout");
return 4; //4 values pushed: 3 result tables + timeout msg
} else {
lua_pushstring(L, strerror(errno));
return 4; //4 values pushed: 3 result tables + errno msg
}
}
int Dps_ftp_read_line(DPS_CONN *connp){
if (socket_select(connp, DPS_NET_READ_TIMEOUT, 'r')){
#ifdef DEBUG_FTP
fprintf(stderr, "ftp://%s (ftp_read_line-timeout-err): ", connp->hostname);
/*DpsLog(connp->indexer, DPS_LOG_DEBUG, "ftp://%s (ftp_read_line-timeout-err): ", connp->hostname);*/
#endif
return -1;
}
do {
if (socket_read_line(connp) < 0)
return -1;
if (((connp->buf[0] =='1')||(connp->buf[0] =='2')||
(connp->buf[0] =='3')||(connp->buf[0] =='4')||
(connp->buf[0] =='5')) && (connp->buf[3] == ' '))
break;
}while( 1 );
return 0;
}
int main(int argc, char **argv)
{
t_socket *socket;
if (argc < 3)
{
ft_printf("Usage: client <host> <port>");
return (0);
}
socket_set_default_read(def_read);
socket_set_default_receive(def_receive);
socket_set_default_error(def_err);
socket = socket_create();
socket_connect(socket, argv[1], ft_atoi(argv[2]));
while (1 != 2)
{
socket_select(socket);
}
close(socket->fd);
return (0);
}
int socket_accept(UDM_CONN *connp){
struct sockaddr sa;
int sfd;
socklen_t len;
if (socket_select(connp, UDM_NET_ACC_TIMEOUT, 'r') == -1)
return -1;
len = sizeof(struct sockaddr);
sfd = accept(connp->conn_fd, &sa, &len);
socket_close(connp);
if (sfd == -1){
connp->err = UDM_NET_ERROR;
return -1;
}
connp->conn_fd = sfd;
memcpy(&connp->sin, &sa, sizeof(connp->sin));
return 0;
}
int socket_wait_writable(struct mySocket *sock, struct timeval *timeout) {
return socket_select(sock, timeout, 0, 1);
}
int server_loop(struct command_context *command_context)
{
struct service *service;
bool poll_ok = true;
/* used in select() */
fd_set read_fds;
int fd_max;
/* used in accept() */
int retval;
#ifndef _WIN32
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
LOG_ERROR("couldn't set SIGPIPE to SIG_IGN");
#endif
while (!shutdown_openocd) {
/* monitor sockets for activity */
fd_max = 0;
FD_ZERO(&read_fds);
/* add service and connection fds to read_fds */
for (service = services; service; service = service->next) {
if (service->fd != -1) {
/* listen for new connections */
FD_SET(service->fd, &read_fds);
if (service->fd > fd_max)
fd_max = service->fd;
}
if (service->connections) {
struct connection *c;
for (c = service->connections; c; c = c->next) {
/* check for activity on the connection */
FD_SET(c->fd, &read_fds);
if (c->fd > fd_max)
fd_max = c->fd;
}
}
}
struct timeval tv;
tv.tv_sec = 0;
if (poll_ok) {
/* we're just polling this iteration, this is faster on embedded
* hosts */
tv.tv_usec = 0;
retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
} else {
/* Every 100ms */
tv.tv_usec = 100000;
/* Only while we're sleeping we'll let others run */
openocd_sleep_prelude();
kept_alive();
retval = socket_select(fd_max + 1, &read_fds, NULL, NULL, &tv);
openocd_sleep_postlude();
}
if (retval == -1) {
#ifdef _WIN32
errno = WSAGetLastError();
if (errno == WSAEINTR)
FD_ZERO(&read_fds);
else {
LOG_ERROR("error during select: %s", strerror(errno));
exit(-1);
}
#else
if (errno == EINTR)
FD_ZERO(&read_fds);
else {
LOG_ERROR("error during select: %s", strerror(errno));
exit(-1);
}
#endif
}
if (retval == 0) {
/* We only execute these callbacks when there was nothing to do or we timed
*out */
target_call_timer_callbacks();
process_jim_events(command_context);
FD_ZERO(&read_fds); /* eCos leaves read_fds unchanged in this case! */
/* We timed out/there was nothing to do, timeout rather than poll next time
**/
poll_ok = false;
} else {
/* There was something to do, next time we'll just poll */
poll_ok = true;
}
/* This is a simple back-off algorithm where we immediately
* re-poll if we did something this time around.
*
* This greatly improves performance of DCC.
*/
poll_ok = poll_ok || target_got_message();
for (service = services; service; service = service->next) {
/* handle new connections on listeners */
if ((service->fd != -1)
&& (FD_ISSET(service->fd, &read_fds))) {
if (service->max_connections > 0)
add_connection(service, command_context);
else {
if (service->type == CONNECTION_TCP) {
struct sockaddr_in sin;
socklen_t address_size = sizeof(sin);
int tmp_fd;
tmp_fd = accept(service->fd,
(struct sockaddr *)&service->sin,
&address_size);
close_socket(tmp_fd);
}
LOG_INFO(
"rejected '%s' connection, no more connections allowed",
service->name);
}
}
/* handle activity on connections */
if (service->connections) {
struct connection *c;
for (c = service->connections; c; ) {
if ((FD_ISSET(c->fd, &read_fds)) || c->input_pending) {
retval = service->input(c);
if (retval != ERROR_OK) {
struct connection *next = c->next;
if (service->type == CONNECTION_PIPE) {
/* if connection uses a pipe then
*shutdown openocd on error */
shutdown_openocd = 1;
}
remove_connection(service, c);
LOG_INFO("dropped '%s' connection",
service->name);
c = next;
continue;
}
}
c = c->next;
}
}
}
#ifdef _WIN32
MSG msg;
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
if (msg.message == WM_QUIT)
shutdown_openocd = 1;
}
#endif
}
return ERROR_OK;
}
/**
* netplay_sync_pre_frame
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay synchronization.
*/
bool netplay_sync_pre_frame(netplay_t *netplay)
{
retro_ctx_serialize_info_t serial_info;
if (netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->run_ptr], netplay->run_frame_count))
{
serial_info.data_const = NULL;
serial_info.data = netplay->buffer[netplay->run_ptr].state;
serial_info.size = netplay->state_size;
memset(serial_info.data, 0, serial_info.size);
if ((netplay->quirks & NETPLAY_QUIRK_INITIALIZATION) || netplay->run_frame_count == 0)
{
/* Don't serialize until it's safe */
}
else if (!(netplay->quirks & NETPLAY_QUIRK_NO_SAVESTATES) && core_serialize(&serial_info))
{
if (netplay->force_send_savestate && !netplay->stall && !netplay->remote_paused)
{
/* Bring our running frame and input frames into parity so we don't
* send old info */
if (netplay->run_ptr != netplay->self_ptr)
{
memcpy(netplay->buffer[netplay->self_ptr].state,
netplay->buffer[netplay->run_ptr].state,
netplay->state_size);
netplay->run_ptr = netplay->self_ptr;
netplay->run_frame_count = netplay->self_frame_count;
}
/* Send this along to the other side */
serial_info.data_const = netplay->buffer[netplay->run_ptr].state;
netplay_load_savestate(netplay, &serial_info, false);
netplay->force_send_savestate = false;
}
}
else
{
/* If the core can't serialize properly, we must stall for the
* remote input on EVERY frame, because we can't recover */
netplay->quirks |= NETPLAY_QUIRK_NO_SAVESTATES;
netplay->stateless_mode = true;
}
/* If we can't transmit savestates, we must stall until the client is ready */
if (netplay->run_frame_count > 0 &&
(netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION)) &&
(netplay->connections_size == 0 || !netplay->connections[0].active ||
netplay->connections[0].mode < NETPLAY_CONNECTION_CONNECTED))
netplay->stall = NETPLAY_STALL_NO_CONNECTION;
}
if (netplay->is_server)
{
fd_set fds;
struct timeval tmp_tv = {0};
int new_fd;
struct sockaddr_storage their_addr;
socklen_t addr_size;
struct netplay_connection *connection;
size_t connection_num;
/* Check for a connection */
FD_ZERO(&fds);
FD_SET(netplay->listen_fd, &fds);
if (socket_select(netplay->listen_fd + 1, &fds, NULL, NULL, &tmp_tv) > 0 &&
FD_ISSET(netplay->listen_fd, &fds))
{
addr_size = sizeof(their_addr);
new_fd = accept(netplay->listen_fd, (struct sockaddr*)&their_addr, &addr_size);
if (new_fd < 0)
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_NETPLAY_FAILED));
goto process;
}
/* Set the socket nonblocking */
if (!socket_nonblock(new_fd))
{
/* Catastrophe! */
socket_close(new_fd);
goto process;
}
#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
{
int flag = 1;
if (setsockopt(new_fd, IPPROTO_TCP, TCP_NODELAY,
#ifdef _WIN32
(const char*)
#else
(const void*)
#endif
&flag,
sizeof(int)) < 0)
RARCH_WARN("Could not set netplay TCP socket to nodelay. Expect jitter.\n");
}
#endif
#if defined(F_SETFD) && defined(FD_CLOEXEC)
/* Don't let any inherited processes keep open our port */
if (fcntl(new_fd, F_SETFD, FD_CLOEXEC) < 0)
RARCH_WARN("Cannot set Netplay port to close-on-exec. It may fail to reopen if the client disconnects.\n");
#endif
/* Allocate a connection */
for (connection_num = 0; connection_num < netplay->connections_size; connection_num++)
if (!netplay->connections[connection_num].active &&
netplay->connections[connection_num].mode != NETPLAY_CONNECTION_DELAYED_DISCONNECT) break;
if (connection_num == netplay->connections_size)
{
if (connection_num == 0)
{
netplay->connections = (struct netplay_connection*)malloc(sizeof(struct netplay_connection));
if (netplay->connections == NULL)
{
socket_close(new_fd);
goto process;
}
netplay->connections_size = 1;
}
else
{
size_t new_connections_size = netplay->connections_size * 2;
struct netplay_connection *new_connections = (struct netplay_connection*)
realloc(netplay->connections,
new_connections_size*sizeof(struct netplay_connection));
if (new_connections == NULL)
{
socket_close(new_fd);
goto process;
}
memset(new_connections + netplay->connections_size, 0,
netplay->connections_size * sizeof(struct netplay_connection));
netplay->connections = new_connections;
netplay->connections_size = new_connections_size;
}
}
connection = &netplay->connections[connection_num];
/* Set it up */
memset(connection, 0, sizeof(*connection));
connection->active = true;
connection->fd = new_fd;
connection->mode = NETPLAY_CONNECTION_INIT;
if (!netplay_init_socket_buffer(&connection->send_packet_buffer,
netplay->packet_buffer_size) ||
!netplay_init_socket_buffer(&connection->recv_packet_buffer,
netplay->packet_buffer_size))
{
if (connection->send_packet_buffer.data)
netplay_deinit_socket_buffer(&connection->send_packet_buffer);
connection->active = false;
socket_close(new_fd);
goto process;
}
netplay_handshake_init_send(netplay, connection);
}
}
process:
netplay->can_poll = true;
input_poll_net();
return (netplay->stall != NETPLAY_STALL_NO_CONNECTION);
}
static bool netplay_lan_ad_client(void)
{
fd_set fds;
socklen_t addr_size;
struct sockaddr their_addr;
struct timeval tmp_tv = {0};
if (lan_ad_client_fd < 0)
return false;
/* Check for any ad queries */
while (1)
{
FD_ZERO(&fds);
FD_SET(lan_ad_client_fd, &fds);
if (socket_select(lan_ad_client_fd + 1,
&fds, NULL, NULL, &tmp_tv) <= 0)
break;
if (!FD_ISSET(lan_ad_client_fd, &fds))
break;
/* Somebody queried, so check that it's valid */
addr_size = sizeof(their_addr);
if (recvfrom(lan_ad_client_fd, (char*)&ad_packet_buffer,
sizeof(struct ad_packet), 0, &their_addr, &addr_size) >=
(ssize_t) sizeof(struct ad_packet))
{
struct netplay_host *host = NULL;
/* Make sure it's a valid response */
if (memcmp((void *) &ad_packet_buffer, "RANS", 4))
continue;
/* For this version */
if (ntohl(ad_packet_buffer.protocol_version) != NETPLAY_PROTOCOL_VERSION)
continue;
/* And that we know how to handle it */
if (their_addr.sa_family == AF_INET)
{
struct sockaddr_in *sin = (struct sockaddr_in *) &their_addr;
sin->sin_port = htons(ntohl(ad_packet_buffer.port));
}
#ifdef HAVE_INET6
else if (their_addr.sa_family == AF_INET6)
{
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) &their_addr;
sin6->sin6_port = htons(ad_packet_buffer.port);
}
#endif
else continue;
/* Allocate space for it */
if (discovered_hosts.size >= discovered_hosts_allocated)
{
size_t allocated = discovered_hosts_allocated;
struct netplay_host *new_hosts = NULL;
if (allocated == 0)
allocated = 2;
else
allocated *= 2;
if (discovered_hosts.hosts)
new_hosts = (struct netplay_host *)
realloc(discovered_hosts.hosts, allocated * sizeof(struct
netplay_host));
else
/* Should be equivalent to realloc, but I don't trust screwy libcs */
new_hosts = (struct netplay_host *)
malloc(allocated * sizeof(struct netplay_host));
if (!new_hosts)
return false;
discovered_hosts.hosts = new_hosts;
discovered_hosts_allocated = allocated;
}
/* Get our host structure */
host = &discovered_hosts.hosts[discovered_hosts.size++];
/* Copy in the response */
memset(host, 0, sizeof(struct netplay_host));
host->addr = their_addr;
host->addrlen = addr_size;
strlcpy(host->nick, ad_packet_buffer.nick, NETPLAY_HOST_STR_LEN);
strlcpy(host->core, ad_packet_buffer.core, NETPLAY_HOST_STR_LEN);
strlcpy(host->core_version, ad_packet_buffer.core_version,
NETPLAY_HOST_STR_LEN);
strlcpy(host->content, ad_packet_buffer.content,
NETPLAY_HOST_LONGSTR_LEN);
host->content_crc =
atoi(ad_packet_buffer.content_crc);
host->nick[NETPLAY_HOST_STR_LEN-1] =
host->core[NETPLAY_HOST_STR_LEN-1] =
host->core_version[NETPLAY_HOST_STR_LEN-1] =
host->content[NETPLAY_HOST_LONGSTR_LEN-1] = '\0';
}
}
return true;
}
/**
* netplay_pre_frame:
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay.
* Call this before running retro_run().
*
* Returns: true (1) if the frontend is cleared to emulate the frame, false (0)
* if we're stalled or paused
**/
bool netplay_pre_frame(netplay_t *netplay)
{
bool sync_stalled;
settings_t *settings = config_get_ptr();
retro_assert(netplay);
if (settings->bools.netplay_public_announce)
{
reannounce++;
if ((netplay->is_server || is_mitm) && (reannounce % 600 == 0))
netplay_announce();
}
else
{
/* Make sure that if announcement is turned on mid-game, it gets announced */
reannounce = -1;
}
/* FIXME: This is an ugly way to learn we're not paused anymore */
if (netplay->local_paused)
netplay_frontend_paused(netplay, false);
if (netplay->quirks & NETPLAY_QUIRK_INITIALIZATION)
{
/* Are we ready now? */
netplay_try_init_serialization(netplay);
}
if (netplay->is_server && !settings->bools.netplay_use_mitm_server)
{
/* Advertise our server */
netplay_lan_ad_server(netplay);
/* NAT traversal if applicable */
if (netplay->nat_traversal &&
!netplay->nat_traversal_task_oustanding &&
netplay->nat_traversal_state.request_outstanding &&
!netplay->nat_traversal_state.have_inet4)
{
struct timeval tmptv = {0};
fd_set fds = netplay->nat_traversal_state.fds;
if (socket_select(netplay->nat_traversal_state.nfds, &fds, NULL, NULL, &tmptv) > 0)
natt_read(&netplay->nat_traversal_state);
#ifndef HAVE_SOCKET_LEGACY
if (!netplay->nat_traversal_state.request_outstanding ||
netplay->nat_traversal_state.have_inet4)
netplay_announce_nat_traversal(netplay);
#endif
}
}
sync_stalled = !netplay_sync_pre_frame(netplay);
/* If we're disconnected, deinitialize */
if (!netplay->is_server && !netplay->connections[0].active)
{
netplay_disconnect(netplay);
return true;
}
if (sync_stalled ||
((!netplay->is_server || (netplay->connected_players>1)) &&
(netplay->stall || netplay->remote_paused)))
{
/* We may have received data even if we're stalled, so run post-frame
* sync */
netplay_sync_post_frame(netplay, true);
return false;
}
return true;
}
bool netplay_ad_server(netplay_t *netplay, int ad_fd)
{
fd_set fds;
struct timeval tmp_tv = {0};
struct sockaddr their_addr;
socklen_t addr_size;
rarch_system_info_t *info = NULL;
size_t bufloc;
if (!ad_packet_buffer)
{
ad_packet_buffer = (uint32_t *) malloc(AD_PACKET_MAX_SIZE);
if (!ad_packet_buffer)
return false;
}
/* Check for any ad queries */
while (1)
{
FD_ZERO(&fds);
FD_SET(ad_fd, &fds);
if (socket_select(ad_fd + 1, &fds, NULL, NULL, &tmp_tv) <= 0)
break;
if (!FD_ISSET(ad_fd, &fds))
break;
/* Somebody queried, so check that it's valid */
if (recvfrom(ad_fd, (char*)ad_packet_buffer, AD_PACKET_MAX_SIZE, 0,
&their_addr, &addr_size) >= (ssize_t) (2*sizeof(uint32_t)))
{
/* Make sure it's a valid query */
if (memcmp(ad_packet_buffer, "RANQ", 4))
continue;
/* For this version */
if (ntohl(ad_packet_buffer[1]) != NETPLAY_PROTOCOL_VERSION)
continue;
runloop_ctl(RUNLOOP_CTL_SYSTEM_INFO_GET, &info);
/* Now build our response */
memset(ad_packet_buffer, 0, AD_PACKET_MAX_SIZE);
memcpy(ad_packet_buffer, "RANS", 4);
ad_packet_buffer[1] = htonl(NETPLAY_PROTOCOL_VERSION);
ad_packet_buffer[2] = htonl(netplay->tcp_port);
bufloc = 3;
strncpy((char *) (ad_packet_buffer + bufloc),
PACKAGE_VERSION, AD_PACKET_STRING_SIZE);
bufloc += AD_PACKET_STRING_WORDS;
strncpy((char *) (ad_packet_buffer + bufloc),
netplay->nick, AD_PACKET_STRING_SIZE);
bufloc += AD_PACKET_STRING_WORDS;
if (info)
{
strncpy((char *) (ad_packet_buffer + bufloc),
info->info.library_name, AD_PACKET_STRING_SIZE);
bufloc += AD_PACKET_STRING_WORDS;
strncpy((char *) (ad_packet_buffer + bufloc),
info->info.library_version, AD_PACKET_STRING_SIZE);
bufloc += AD_PACKET_STRING_WORDS;
/* Blank content */
bufloc += AD_PACKET_STRING_WORDS;
}
else
{
bufloc += 3*AD_PACKET_STRING_WORDS;
}
/* And send it */
sendto(ad_fd, (const char*)ad_packet_buffer, bufloc*sizeof(uint32_t), 0,
&their_addr, addr_size);
}
}
return true;
}
/**
* netplay_lan_ad_server
*
* Respond to any LAN ad queries that the netplay server has received.
*/
bool netplay_lan_ad_server(netplay_t *netplay)
{
fd_set fds;
struct timeval tmp_tv = {0};
struct sockaddr their_addr;
socklen_t addr_size;
rarch_system_info_t *info = NULL;
if (lan_ad_server_fd < 0 && !init_lan_ad_server_socket(netplay, RARCH_DEFAULT_PORT))
return false;
/* Check for any ad queries */
while (1)
{
FD_ZERO(&fds);
FD_SET(lan_ad_server_fd, &fds);
if (socket_select(lan_ad_server_fd + 1, &fds, NULL, NULL, &tmp_tv) <= 0)
break;
if (!FD_ISSET(lan_ad_server_fd, &fds))
break;
/* Somebody queried, so check that it's valid */
addr_size = sizeof(their_addr);
if (recvfrom(lan_ad_server_fd, (char*)&ad_packet_buffer,
sizeof(struct ad_packet), 0, &their_addr, &addr_size) >=
(ssize_t) (2*sizeof(uint32_t)))
{
char s[NETPLAY_HOST_STR_LEN];
uint32_t content_crc = 0;
/* Make sure it's a valid query */
if (memcmp((void *) &ad_packet_buffer, "RANQ", 4))
continue;
/* For this version */
if (ntohl(ad_packet_buffer.protocol_version) !=
NETPLAY_PROTOCOL_VERSION)
continue;
info = runloop_get_system_info();
/* Now build our response */
content_crc = content_get_crc();
memset(&ad_packet_buffer, 0, sizeof(struct ad_packet));
memcpy(&ad_packet_buffer, "RANS", 4);
ad_packet_buffer.protocol_version =
htonl(NETPLAY_PROTOCOL_VERSION);
ad_packet_buffer.port = htonl(netplay->tcp_port);
strlcpy(ad_packet_buffer.retroarch_version, PACKAGE_VERSION,
NETPLAY_HOST_STR_LEN);
strlcpy(ad_packet_buffer.content, !string_is_empty(
path_basename(path_get(RARCH_PATH_BASENAME)))
? path_basename(path_get(RARCH_PATH_BASENAME)) : "N/A",
NETPLAY_HOST_LONGSTR_LEN);
strlcpy(ad_packet_buffer.nick, netplay->nick, NETPLAY_HOST_STR_LEN);
if (info)
{
strlcpy(ad_packet_buffer.core, info->info.library_name,
NETPLAY_HOST_STR_LEN);
strlcpy(ad_packet_buffer.core_version, info->info.library_version,
NETPLAY_HOST_STR_LEN);
}
snprintf(s, sizeof(s), "%d", content_crc);
strlcpy(ad_packet_buffer.content_crc, s,
NETPLAY_HOST_STR_LEN);
/* And send it */
sendto(lan_ad_server_fd, (const char*)&ad_packet_buffer,
sizeof(struct ad_packet), 0, &their_addr, addr_size);
}
}
return true;
}
/**
* netplay_net_pre_frame:
* @netplay : pointer to netplay object
*
* Pre-frame for Netplay (normal version).
**/
static bool netplay_net_pre_frame(netplay_t *netplay)
{
retro_ctx_serialize_info_t serial_info;
if (netplay_delta_frame_ready(netplay, &netplay->buffer[netplay->self_ptr], netplay->self_frame_count))
{
serial_info.data_const = NULL;
serial_info.data = netplay->buffer[netplay->self_ptr].state;
serial_info.size = netplay->state_size;
memset(serial_info.data, 0, serial_info.size);
if ((netplay->quirks & NETPLAY_QUIRK_INITIALIZATION) || netplay->self_frame_count == 0)
{
/* Don't serialize until it's safe */
}
else if (!(netplay->quirks & NETPLAY_QUIRK_NO_SAVESTATES) && core_serialize(&serial_info))
{
if (netplay->force_send_savestate && !netplay->stall)
{
/* Send this along to the other side */
serial_info.data_const = netplay->buffer[netplay->self_ptr].state;
netplay_load_savestate(netplay, &serial_info, false);
netplay->force_send_savestate = false;
}
}
else
{
/* If the core can't serialize properly, we must stall for the
* remote input on EVERY frame, because we can't recover */
netplay->quirks |= NETPLAY_QUIRK_NO_SAVESTATES;
netplay->stall_frames = 0;
}
/* If we can't transmit savestates, we must stall until the client is ready */
if (!netplay->has_connection &&
netplay->self_frame_count > 0 &&
(netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION)))
netplay->stall = RARCH_NETPLAY_STALL_NO_CONNECTION;
}
if (netplay->is_server && !netplay->has_connection)
{
fd_set fds;
struct timeval tmp_tv = {0};
int new_fd;
struct sockaddr_storage their_addr;
socklen_t addr_size;
/* Check for a connection */
FD_ZERO(&fds);
FD_SET(netplay->fd, &fds);
if (socket_select(netplay->fd + 1, &fds, NULL, NULL, &tmp_tv) > 0 &&
FD_ISSET(netplay->fd, &fds))
{
addr_size = sizeof(their_addr);
new_fd = accept(netplay->fd, (struct sockaddr*)&their_addr, &addr_size);
if (new_fd < 0)
{
RARCH_ERR("%s\n", msg_hash_to_str(MSG_NETPLAY_FAILED));
return true;
}
socket_close(netplay->fd);
netplay->fd = new_fd;
#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
{
int flag = 1;
if (setsockopt(netplay->fd, IPPROTO_TCP, TCP_NODELAY, (void*)&flag, sizeof(int)) < 0)
RARCH_WARN("Could not set netplay TCP socket to nodelay. Expect jitter.\n");
}
#endif
#if defined(F_SETFD) && defined(FD_CLOEXEC)
/* Don't let any inherited processes keep open our port */
if (fcntl(netplay->fd, F_SETFD, FD_CLOEXEC) < 0)
RARCH_WARN("Cannot set Netplay port to close-on-exec. It may fail to reopen if the client disconnects.\n");
#endif
/* Establish the connection */
if (netplay_handshake(netplay))
{
netplay->has_connection = true;
/* Send them the savestate */
if (!(netplay->quirks & (NETPLAY_QUIRK_NO_SAVESTATES|NETPLAY_QUIRK_NO_TRANSMISSION)))
{
netplay->force_send_savestate = true;
}
else
{
/* Because the first frame isn't serialized, we're actually at
* frame 1 */
netplay->self_ptr = NEXT_PTR(netplay->self_ptr);
netplay->self_frame_count = 1;
}
/* And expect the current frame from the other side */
netplay->read_frame_count = netplay->other_frame_count = netplay->self_frame_count;
netplay->read_ptr = netplay->other_ptr = netplay->self_ptr;
/* Unstall if we were waiting for this */
if (netplay->stall == RARCH_NETPLAY_STALL_NO_CONNECTION)
netplay->stall = 0;
}
else
{
socket_close(netplay->fd);
/* FIXME: Get in a state to accept another client */
}
}
}
netplay->can_poll = true;
input_poll_net();
return (netplay->stall != RARCH_NETPLAY_STALL_NO_CONNECTION);
}
int socket_wait_readable(struct mySocket *sock, struct timeval *timeout) {
return socket_select(sock, timeout, 1, 0);
}
/**
* 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
}