mirror of
git://xwords.git.sourceforge.net/gitroot/xwords/xwords
synced 2024-12-30 10:26:58 +01:00
307 lines
9.1 KiB
C
307 lines
9.1 KiB
C
/* -*-mode: C; fill-column: 78; c-basic-offset: 4; compile-command: "make MEMDEBUG=TRUE";-*- */
|
|
/*
|
|
* Copyright 2007-2009 by Eric House (xwords@eehouse.org). All rights
|
|
* reserved.
|
|
*
|
|
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef XWFEATURE_IP_DIRECT
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <errno.h>
|
|
#include <netdb.h>
|
|
#include <sys/socket.h>
|
|
#ifdef XWFEATURE_BLUETOOTH
|
|
# include <bluetooth/bluetooth.h>
|
|
# if defined BT_USE_L2CAP
|
|
# include <bluetooth/l2cap.h>
|
|
# elif defined BT_USE_RFCOMM
|
|
# include <bluetooth/rfcomm.h>
|
|
# endif
|
|
# include <bluetooth/sdp.h>
|
|
# include <bluetooth/sdp_lib.h>
|
|
#endif
|
|
|
|
#include "linuxudp.h"
|
|
#include "comms.h"
|
|
#include "strutils.h"
|
|
|
|
/* Conecting: Expectation is that the client initiates the connection to a
|
|
* known port on the server and that the server uses return addresses to reach
|
|
* the client. This works for games started from scratch. But when we start
|
|
* from saved games it doesn't: the server knows whatever ephemeral port the
|
|
* client was on before, but that's all. The client needs to ping the server
|
|
* immediately, perhaps in a way analogous to btStartup.
|
|
*/
|
|
|
|
|
|
typedef struct LinUDPStuff {
|
|
CommonGlobals* globals;
|
|
CommsAddrRec addr;
|
|
XP_Bool isServer;
|
|
void* storage;
|
|
int knownSocks[MAX_NUM_PLAYERS];
|
|
int nKnownSocks;
|
|
int socket; /* host opens to receive; guest opens to send */
|
|
} LinUDPStuff;
|
|
|
|
void
|
|
linux_udp_open( CommonGlobals* globals, const CommsAddrRec* newAddr )
|
|
{
|
|
LOG_FUNC();
|
|
LinUDPStuff* stuff = globals->udpStuff;
|
|
if ( !stuff ) {
|
|
struct sockaddr_in saddr;
|
|
int err;
|
|
|
|
stuff = XP_MALLOC( globals->params->util->mpool, sizeof(*stuff) );
|
|
XP_MEMSET( stuff, 0, sizeof(*stuff) );
|
|
XP_MEMCPY( &stuff->addr, newAddr, sizeof(stuff->addr) );
|
|
|
|
globals->udpStuff = stuff;
|
|
stuff->globals = globals;
|
|
stuff->socket = -1;
|
|
|
|
stuff->isServer = comms_getIsServer( globals->game.comms );
|
|
|
|
if ( stuff->isServer ) {
|
|
int listenSock;
|
|
listenSock = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
|
|
saddr.sin_family = PF_INET;
|
|
saddr.sin_addr.s_addr = htonl(INADDR_ANY);
|
|
saddr.sin_port = htons(stuff->addr.u.ip.port_ip);
|
|
XP_LOGF( "binding listen socket" );
|
|
err = bind( listenSock, (struct sockaddr *)&saddr, sizeof(saddr) );
|
|
if ( 0 != err ) {
|
|
XP_LOGF( "bind()=>%s", strerror(errno) );
|
|
listenSock = -1;
|
|
}
|
|
stuff->socket = listenSock;
|
|
(*globals->socketChanged)( globals->socketChangedClosure, -1,
|
|
listenSock, &stuff->storage );
|
|
}
|
|
|
|
}
|
|
LOG_RETURN_VOID();
|
|
} /* linux_udp_open */
|
|
|
|
void
|
|
linux_udp_reset( CommonGlobals* globals )
|
|
{
|
|
CommsAddrRec addr;
|
|
LinUDPStuff* stuff = globals->udpStuff;
|
|
LOG_FUNC();
|
|
XP_ASSERT( stuff );
|
|
if ( !!stuff ) {
|
|
XP_MEMCPY( &addr, &stuff->addr, sizeof(addr) );
|
|
linux_udp_close( globals );
|
|
}
|
|
sleep( 1 );
|
|
linux_udp_open( globals, &addr );
|
|
LOG_RETURN_VOID();
|
|
}
|
|
|
|
void
|
|
linux_udp_close( CommonGlobals* globals )
|
|
{
|
|
LinUDPStuff* stuff = globals->udpStuff;
|
|
LOG_FUNC();
|
|
if ( !!stuff ) {
|
|
if ( stuff->socket != -1 ) {
|
|
XP_LOGF( "closed socket %d", stuff->socket );
|
|
(*globals->socketChanged)( globals->socketChangedClosure, stuff->socket, -1,
|
|
&stuff->storage );
|
|
close( stuff->socket );
|
|
stuff->socket = -1;
|
|
} else {
|
|
XP_LOGF( "no socket to close" );
|
|
}
|
|
XP_FREE( globals->params->util->mpool, stuff );
|
|
globals->udpStuff = NULL;
|
|
}
|
|
LOG_RETURN_VOID();
|
|
}
|
|
|
|
static XP_U32
|
|
addrForHost( const CommsAddrRec* addr )
|
|
{
|
|
struct hostent* host;
|
|
XP_U32 ip = addr->u.ip.ipAddr_ip;
|
|
|
|
if ( 0L == ip ) {
|
|
host = gethostbyname( addr->u.ip.hostName_ip );
|
|
if ( NULL == host ) {
|
|
XP_WARNF( "gethostbyname returned -1\n" );
|
|
} else {
|
|
XP_MEMCPY( &ip, host->h_addr_list[0], sizeof(ip) );
|
|
ip = ntohl(ip);
|
|
}
|
|
XP_LOGF( "%s found %lx for %s", __func__, ip, addr->u.ip.hostName_ip );
|
|
}
|
|
return ip;
|
|
} /* addrForHost */
|
|
|
|
static void
|
|
addressToServer( struct sockaddr_in* to, const CommsAddrRec* addr )
|
|
{
|
|
to->sin_family = PF_INET;
|
|
to->sin_addr.s_addr = htonl( addrForHost(addr) );
|
|
to->sin_port = htons(addr->u.ip.port_ip);
|
|
}
|
|
|
|
static void
|
|
remember( LinUDPStuff* stuff, int sock )
|
|
{
|
|
XP_U16 i;
|
|
XP_Bool known;
|
|
for ( i = 0, known = XP_FALSE;
|
|
!known && i < sizeof(stuff->knownSocks)/sizeof(stuff->knownSocks[0]);
|
|
++i ) {
|
|
if ( stuff->knownSocks[i] == sock ) {
|
|
known = XP_TRUE;
|
|
}
|
|
}
|
|
|
|
if ( !known ) {
|
|
XP_ASSERT( stuff->nKnownSocks
|
|
< sizeof(stuff->knownSocks)/sizeof(stuff->knownSocks[0])-1 );
|
|
XP_LOGF( "%s recording %d", __func__, sock );
|
|
stuff->knownSocks[stuff->nKnownSocks++] = sock;
|
|
}
|
|
}
|
|
|
|
static XP_Bool
|
|
remembered( const LinUDPStuff* stuff, int sock )
|
|
{
|
|
XP_Bool known = XP_FALSE;
|
|
XP_U16 i;
|
|
for ( i = 0; i < stuff->nKnownSocks; ++i ) {
|
|
XP_ASSERT( i < sizeof(stuff->knownSocks)/sizeof(stuff->knownSocks[0]) );
|
|
if ( stuff->knownSocks[i] == sock ) {
|
|
known = XP_TRUE;
|
|
}
|
|
}
|
|
LOG_RETURNF( "%d", (int)known );
|
|
return known;
|
|
}
|
|
|
|
static XP_Bool
|
|
addressToClient( LinUDPStuff* stuff, struct sockaddr_in* to, const CommsAddrRec* addr )
|
|
{
|
|
int port = addr->u.ip.port_ip;
|
|
XP_Bool known = remembered( stuff, port );
|
|
|
|
if ( known ) {
|
|
to->sin_family = PF_INET;
|
|
to->sin_addr.s_addr = htonl(addr->u.ip.ipAddr_ip);
|
|
to->sin_port = htons(port);
|
|
}
|
|
return known;
|
|
}
|
|
|
|
XP_S16
|
|
linux_udp_send( const XP_U8* buf, XP_U16 buflen, const CommsAddrRec* addrp,
|
|
CommonGlobals* globals )
|
|
{
|
|
LinUDPStuff* stuff = globals->udpStuff;
|
|
ssize_t nSent = -1;
|
|
|
|
LOG_FUNC();
|
|
if ( NULL != stuff ) {
|
|
XP_Bool haveAddress = XP_TRUE;
|
|
CommsAddrRec addr;
|
|
if ( !addrp ) {
|
|
comms_getAddr( globals->game.comms, &addr );
|
|
addrp = &addr;
|
|
}
|
|
|
|
struct sockaddr_in to;
|
|
XP_MEMSET( &to, 0, sizeof(to) );
|
|
|
|
if ( stuff->isServer ) {
|
|
if ( !addressToClient( stuff, &to, addrp ) ) {
|
|
haveAddress = XP_FALSE;
|
|
}
|
|
} else {
|
|
if ( stuff->socket == -1 ) {
|
|
stuff->socket = socket( AF_INET, SOCK_DGRAM, IPPROTO_UDP );
|
|
XP_LOGF( "%s: client made socket = %d", __func__,
|
|
stuff->socket );
|
|
(*stuff->globals->socketChanged)
|
|
( stuff->globals->socketChangedClosure,
|
|
-1, stuff->socket, &stuff->storage );
|
|
}
|
|
addressToServer( &to, addrp );
|
|
}
|
|
|
|
if ( haveAddress ) {
|
|
XP_LOGF( "calling sendto: sock=%d; port=%d; ipaddr=%x",
|
|
stuff->socket, ntohs(to.sin_port), to.sin_addr.s_addr );
|
|
nSent = sendto( stuff->socket, buf, buflen, 0,
|
|
(struct sockaddr*)&to, sizeof(to) );
|
|
if ( nSent != buflen ) {
|
|
XP_LOGF( "sendto->%s", strerror(errno) );
|
|
}
|
|
}
|
|
}
|
|
|
|
LOG_RETURNF( "%d", nSent );
|
|
return nSent;
|
|
} /* linux_udp_send */
|
|
|
|
XP_S16
|
|
linux_udp_receive( int sock, XP_U8* buf, XP_U16 buflen, CommsAddrRec* addr,
|
|
CommonGlobals* globals )
|
|
{
|
|
struct sockaddr_in from;
|
|
socklen_t fromlen = buflen;
|
|
|
|
XP_LOGF( "%s: calling recvfrom on socket %d", __func__, sock );
|
|
|
|
ssize_t nRead = recvfrom( sock, buf, buflen, 0, /* flags */
|
|
(struct sockaddr*)&from, &fromlen );
|
|
XP_ASSERT( nRead > 0 );
|
|
XP_LOGF( "%s read %d bytes", __func__, nRead );
|
|
|
|
if ( nRead > 0 ) {
|
|
int port;
|
|
XP_MEMSET( addr, 0, sizeof(*addr) );
|
|
addr->conType = COMMS_CONN_IP_DIRECT;
|
|
port = ntohs(from.sin_port);
|
|
addr->u.ip.port_ip = port;
|
|
addr->u.ip.ipAddr_ip = ntohl(from.sin_addr.s_addr);
|
|
|
|
if ( globals->udpStuff->isServer ) {
|
|
remember( globals->udpStuff, port );
|
|
}
|
|
}
|
|
|
|
return nRead;
|
|
}
|
|
|
|
void
|
|
linux_udp_socketclosed( CommonGlobals* globals, int sock )
|
|
{
|
|
LinUDPStuff* stuff = globals->udpStuff;
|
|
LOG_FUNC();
|
|
XP_ASSERT( !!stuff );
|
|
XP_ASSERT( stuff->socket == sock );
|
|
stuff->socket = -1;
|
|
LOG_RETURN_VOID();
|
|
}
|
|
|
|
#endif /* XWFEATURE_IP_DIRECT */
|