#include "iothread.h"
#include "random.h"
#include "message.h"
#include "timesync.h"
#include "net.h"
#include <string.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <SDL.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <unistd.h>
#include <fcntl.h>
Include dependency graph for net.c:
Go to the source code of this file.
Functions | |
| static Bool | ConfigIPv4Broadcast (Bool isServer) |
| Opens a new socket (stored as sock) and configures it to broadcast over IPv4. | |
| static Bool | ConfigNonBlocking (int sock) |
| Configures the socket to be non-blocking. | |
| static void | Disconnect (void *ignore) |
| Performs a reliable disconnection from either the server or from all connected clients on the I/O Thread. | |
| static void | DiscoverConnectServer (void *srvstr) |
| Attempts to connect to an existing server that is specified or to one that this function will discover. | |
| const rtsa_char * | GetNetErrorString (int err) |
| Returns a pointer to a string that briefly explains the last network error. | |
| Bool | MessageCliToSrv () |
| Transitions the messaging system from a client state (really anything other than the server state) to the server state. | |
| Bool | MessageSrvToCli () |
| Transitions the messaging system from the server state to the client state. | |
| Bool | NetCliToSrv () |
| Changes the network state from a client state to server. | |
| void | NetDisconnect () |
| Starts the process of disconnecting this client from the server, or disconnecting all clients from this server. | |
| Bool | NetInit (char *srv) |
| Initalizes the networking system. | |
| Bool | NetInitSrv () |
| Initalizes the networking system and attempts to be a server without searching for one on the network. | |
| Bool | NetSrvToCli () |
| Changes the network state from server state to client. | |
| void | NetUninit () |
| Uninitalizes the networking system. | |
| static Bool | SendConnectMsg (Bool bcast) |
| Sends a connection message using the socket sock to the destination outgoingAddr. | |
| int | UnicastSocket (void *addr, Bool block) |
| Creates a new unicast ready UDP socket that is bound to the given address. | |
Variables | |
| Uint32 | clientRandId |
| The random ID generated by this process to uniquely identify it as a client before it has been assigned a client ID by the server. | |
| ClientData * | clients = NULL |
| An array of data on each client indexed by player ID. | |
| Uint32 | localPlayer |
| int | netError = 0 |
| A gobal variable used to store network errors after cetrain events, such as during connection errors. | |
| unsigned int | networkState = NETSTATE_SEARCHING |
| Contains the current operating state of the networking module. | |
| SocketAddr | outgoingAddr |
| The socket address of the server that the client is in communication with. | |
| int | sock = -1 |
| The socket used for communication. | |
| char | statHost [64] |
Copyright (C) 2007 Jeff Jackowski
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. Or visit their website at: http://www.gnu.org/
Definition in file net.c.
Opens a new socket (stored as sock) and configures it to broadcast over IPv4.
| isServer | True if the socket should be configured with the server's port, false for the client's port. |
Definition at line 146 of file net.c.
References SocketAddr_t::addr, ConfigNonBlocking(), FALSE, GetNetErrorString(), GetNetErrorVal, SocketAddr_t::ipv4, SocketAddr_t::length, outgoingAddr, PORT_CLI, PORT_SRV, and sock.
Referenced by DiscoverConnectServer(), and NetCliToSrv().
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| static Bool ConfigNonBlocking | ( | int | sock | ) | [static] |
Configures the socket to be non-blocking.
| sock | The socket to modify. |
Definition at line 119 of file net.c.
References FALSE.
Referenced by ConfigIPv4Broadcast(), and UnicastSocket().
| static void Disconnect | ( | void * | ignore | ) | [static] |
Performs a reliable disconnection from either the server or from all connected clients on the I/O Thread.
For internal use only.
Definition at line 370 of file net.c.
References CloseSocket, GetNumOutgoingMessages(), NetSrvToCli(), NETSTATE_INIT, NETSTATE_SRVDISCONN, networkState, ReceiveMessages(), ServiceMessages(), sock, TIMESYNC_IDLE, and timeSyncState.
Referenced by NetDisconnect(), and NetUninit().
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| static void DiscoverConnectServer | ( | void * | srvstr | ) | [static] |
Attempts to connect to an existing server that is specified or to one that this function will discover.
This function is intended to run on the I/O Thread. It calls ReceiveMessages(), so no other thread should use the Messaging System until this function returns. When networkState is no longer NETSTATE_SEARCHING, this function has ended.
For internal use only.
| srvstr | The string with the hostname of the server to connect to, or NULL to discover a server on the LAN. |
Definition at line 252 of file net.c.
References clientRandId, CloseSocket, ConfigIPv4Broadcast(), FALSE, GetNetErrorVal, SocketAddr_t::ipv4, IsCancelationRequested(), SocketAddr_t::length, MAX_HOST_LEN, NetCliToSrv(), netError, NETSTATE_CLIENT, NETSTATE_CONERR, NETSTATE_CONNECTING, NETSTATE_RCVCFG, NETSTATE_SEARCHERR, NETSTATE_SEARCHING, NETSTATE_SRVDENY, networkState, outgoingAddr, PORT_CLI, PORT_SRV, RandNum(), ReceiveMessages(), SendConnectMsg(), sock, StartClientTimeSync(), StartNameLookup(), statHost, TRUE, and UnicastSocket().
Referenced by NetInit().
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| Bool MessageCliToSrv | ( | ) |
Transitions the messaging system from a client state (really anything other than the server state) to the server state.
For internal use only.
Do not call this function directly; instead, call NetCliToSrv().
Definition at line 1672 of file message.c.
References CancelAllMessages(), FALSE, MAX_PLAYERS, MSG_ACK_SIZE, and TRUE.
Referenced by NetCliToSrv().
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| Bool MessageSrvToCli | ( | ) |
Transitions the messaging system from the server state to the client state.
For internal use only.
Do not call this function directly; instead, call NetSrvToCli().
Definition at line 1691 of file message.c.
References CancelAllMessages(), FALSE, gameOpts, MSG_ACK_SIZE, GameOptions_t::rcvdMsgs, GameOptions_t::totalMsgs, and TRUE.
Referenced by NetSrvToCli().
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Sends a connection message using the socket sock to the destination outgoingAddr.
| bcast | True if the connection message should be broadcast. |
Definition at line 223 of file net.c.
References clientRandId, SocketAddr_t::length, MSG_TYPE_CONN_REQ, MSG_WRITE_32C, outgoingAddr, and sock.
Referenced by DiscoverConnectServer().
| Uint32 clientRandId |
The random ID generated by this process to uniquely identify it as a client before it has been assigned a client ID by the server.
Defined in net.c.
Definition at line 97 of file net.c.
Referenced by DiscoverConnectServer(), HandleConnAccept(), and SendConnectMsg().
| Uint32 localPlayer |
Definition at line 31 of file player.c.
Referenced by AddScoreNotice(), GameInit(), GameRun(), GetSamples(), HandleConnAccept(), HandleConnDisconn(), HandleInput(), MsgFailDisconnect(), NetCliToSrv(), NetDisconnect(), NetUninit(), ReadPlayer(), Send(), SendAck(), SendSpawnRequest(), UpdatePlayers(), and ValidateClient().
| int sock = -1 |
The socket used for communication.
Not marked as static because it is used in other networking related source files.
Definition at line 103 of file net.c.
Referenced by ClientSync(), ConfigIPv4Broadcast(), Disconnect(), DiscoverConnectServer(), FailConnAccept(), HandleConnAccept(), MsgFailDropConnection(), NetCliToSrv(), NetSrvToCli(), NetUninit(), ReceiveMessages(), Send(), SendAck(), SendConnectMsg(), and UnicastSocket().
| char statHost[64] |
Definition at line 40 of file netstat.c.
Referenced by DiscoverConnectServer(), and NetStatUpdate().
1.5.2