void sendPacketToPlayers(MW244BPacket p)
{
ConvertOutgoing(&p);
if (sendto(M->theSocket(), &p, sizeof(MW244BPacket), 0, (struct sockaddr *)&groupAddr, sizeof(Sockaddr)) < 0)
MWError("Sample error");
}
/* This will presumably be modified by you.
It is here to provide an example of how to open a UDP port.
You might choose to use a different strategy
*/
void
netInit()
{
bool joinGame();
Sockaddr nullAddr;
Sockaddr *thisHost;
char buf[128];
int reuse;
u_char ttl;
struct ip_mreq mreq;
/* MAZEPORT will be assigned by the TA to each team */
M->mazePortIs(htons(MAZEPORT));
gethostname(buf, sizeof(buf));
if ((thisHost = resolveHost(buf)) == (Sockaddr *) NULL)
MWError("who am I?");
bcopy((caddr_t) thisHost, (caddr_t) (M->myAddr()), sizeof(Sockaddr));
M->theSocketIs(socket(AF_INET, SOCK_DGRAM, 0));
if (M->theSocket() < 0)
MWError("can't get socket");
/* SO_REUSEADDR allows more than one binding to the same
socket - you cannot have more than one player on one
machine without this */
reuse = 1;
if (setsockopt(M->theSocket(), SOL_SOCKET, SO_REUSEADDR, &reuse,
sizeof(reuse)) < 0) {
MWError("setsockopt failed (SO_REUSEADDR)");
}
nullAddr.sin_family = AF_INET;
nullAddr.sin_addr.s_addr = htonl(INADDR_ANY);
nullAddr.sin_port = M->mazePort();
if (bind(M->theSocket(), (struct sockaddr *)&nullAddr,
sizeof(nullAddr)) < 0)
MWError("netInit binding");
/* Multicast TTL:
0 restricted to the same host
1 restricted to the same subnet
32 restricted to the same site
64 restricted to the same region
128 restricted to the same continent
255 unrestricted
DO NOT use a value > 32. If possible, use a value of 1 when
testing.
*/
ttl = 32;
if (setsockopt(M->theSocket(), IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
sizeof(ttl)) < 0) {
MWError("setsockopt failed (IP_MULTICAST_TTL)");
}
/* uncomment the following if you do not want to receive messages that
you sent out - of course, you cannot have multiple players on the
same machine if you do this */
#if 0
{
u_char loop = 0;
if (setsockopt(M->theSocket(), IPPROTO_IP, IP_MULTICAST_LOOP, &loop,
sizeof(loop)) < 0) {
MWError("setsockopt failed (IP_MULTICAST_LOOP)");
}
}
#endif
/* join the multicast group */
mreq.imr_multiaddr.s_addr = htonl(MAZEGROUP);
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
if (setsockopt(M->theSocket(), IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)
&mreq, sizeof(mreq)) < 0) {
MWError("setsockopt failed (IP_ADD_MEMBERSHIP)");
}
/*
* Now we can try to find a game to join; if none, start one.
*/
/* I haven't implemented joinGame or startGame in this sample */
/*
if (!joinGame())
startGame();
*/
printf("\n");
/* set up some stuff strictly for this local sample */
M->myRatIdIs(0);
M->scoreIs(0);
SetMyRatIndexType(0);
/* Get the multi-cast address ready to use in SendData()
calls. */
memcpy(&groupAddr, &nullAddr, sizeof(Sockaddr));
groupAddr.sin_addr.s_addr = htonl(MAZEGROUP);
mws_set_addr(M->state, (struct sockaddr *)&groupAddr, M->theSocket());
}
void
play(void)
{
MWEvent event;
MW244BPacket incoming;
event.eventDetail = &incoming;
while (TRUE) {
NextEvent(&event, M->theSocket());
if (!M->peeking())
switch(event.eventType) {
case EVENT_A:
aboutFace();
break;
case EVENT_S:
leftTurn();
break;
case EVENT_D:
forward();
break;
case EVENT_F:
rightTurn();
break;
case EVENT_BAR:
backward();
break;
case EVENT_LEFT_D:
peekLeft();
break;
case EVENT_MIDDLE_D:
shoot();
break;
case EVENT_RIGHT_D:
peekRight();
break;
case EVENT_NETWORK:
processPacket(&event);
break;
case EVENT_INT:
quit(0);
break;
}
else
switch (event.eventType) {
case EVENT_RIGHT_U:
case EVENT_LEFT_U:
peekStop();
break;
case EVENT_NETWORK:
processPacket(&event);
break;
}
ratStates(); /* clean house */
manageMissiles();
DoViewUpdate();
mws_update(M->state);
/* Any info to send over network? */
}
}
/* ----------------------------------------------------------------------- */
void play(void)
{ // initialisation
cout << "Starting Play" << endl;
//SetRatPosition(7,1,5,0);
proj.present = false;
proj.prev_x = proj.prev_y = proj.x = proj.y = 1;
int turn = 0;
updateSeqNo = true;
join = false;
for (int k = 0; k < 8; k++)
participants[k] = prevseq_a[k] = 0;
for (int k = 0; k < 8; k++)
expected_seqno[k] = k+1;
GLOBAL_ID = 0;
checking = 1;
checkingzero=1;
MWEvent event;
MW244BPacket incoming;
event.eventDetail = &incoming;
while (TRUE) {
turn ++;
NextEvent(&event, M->theSocket());
if (!M->peeking())
switch(event.eventType) {
case EVENT_A:
aboutFace();
break;
case EVENT_S:
leftTurn();
break;
case EVENT_D:
forward();
break;
case EVENT_F:
rightTurn();
break;
case EVENT_LEFT_D:
peekLeft();
break;
case EVENT_BAR:
shoot();
break;
case EVENT_RIGHT_D:
peekRight();
break;
case EVENT_NETWORK:
processPacket(&event);
break;
case EVENT_TIMEOUT:
checking = (++checking) % 25;
if (checking == 0 && !join){
cout << "Setting ID to zero" << endl;
join = true;
setMapping();
}
else {cout << "TIMEOUT" << endl;
participation = (++participation) % 30;
manageMissiles();
if (participation == 29)
{ ratStates(); /* clean house */
for (int i = 0 ; i < 8 ; i++)
participants[i] = 0;
}
}
break;
case EVENT_INT:
quit(0);
break;
}
else
switch (event.eventType) {
case EVENT_RIGHT_U:
case EVENT_LEFT_U:
peekStop();
break;
case EVENT_NETWORK:
processPacket(&event);
break;
}
DoViewUpdate();
checking ++;
manageMissiles();
if (join && checkingzero == 0)
{
MW244BPacket p;
makePacket(&p,'a',kills, updateSeqNo);
sendPacketToPlayers(p);
}
else if (join && turn % 2 == 0)
{
MW244BPacket p;
makePacket(&p,'t',-1, updateSeqNo);
sendPacketToPlayers(p);
}
}
}
void
netInit()
{
Sockaddr nullAddr;
Sockaddr *thisHost;
char buf[128];
int reuse;
u_char ttl;
struct ip_mreq mreq;
/* MAZEPORT will be assigned by the TA to each team */
M->mazePortIs(htons(MAZEPORT));
gethostname(buf, sizeof(buf));
if ((thisHost = resolveHost(buf)) == (Sockaddr *) NULL)
MWError("who am I?");
bcopy((caddr_t) thisHost, (caddr_t) (M->myAddr()), sizeof(Sockaddr));
M->theSocketIs(socket(AF_INET, SOCK_DGRAM, 0));
if (M->theSocket() < 0)
MWError("can't get socket");
/* SO_REUSEADDR allows more than one binding to the same
socket - you cannot have more than one player on one
machine without this */
reuse = 1;
if (setsockopt(M->theSocket(), SOL_SOCKET, SO_REUSEADDR, &reuse,
sizeof(reuse)) < 0) {
MWError("setsockopt failed (SO_REUSEADDR)");
}
nullAddr.sin_family = AF_INET;
nullAddr.sin_addr.s_addr = htonl(INADDR_ANY);
nullAddr.sin_port = M->mazePort();
if (bind(M->theSocket(), (struct sockaddr *)&nullAddr,
sizeof(nullAddr)) < 0)
MWError("netInit binding");
/* Multicast TTL:
0 restricted to the same host
1 restricted to the same subnet
32 restricted to the same site
64 restricted to the same region
128 restricted to the same continent
255 unrestricted
DO NOT use a value > 32. If possible, use a value of 1 when
testing.
*/
ttl = 1;
if (setsockopt(M->theSocket(), IPPROTO_IP, IP_MULTICAST_TTL, &ttl,
sizeof(ttl)) < 0) {
MWError("setsockopt failed (IP_MULTICAST_TTL)");
}
/* join the multicast group */
mreq.imr_multiaddr.s_addr = htonl(MAZEGROUP);
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
if (setsockopt(M->theSocket(), IPPROTO_IP, IP_ADD_MEMBERSHIP, (char *)
&mreq, sizeof(mreq)) < 0) {
MWError("setsockopt failed (IP_ADD_MEMBERSHIP)");
}
/*
* Now we can try to find a game to join; if none, start one.
*/
printf("\n");
/* set up some stuff strictly for this local sample */
//int temp = rand()%8;/*FIXME- REALLY REALLY RANDOM*/
M->myRatIdIs(0); // FIXME
//M->rat(M->myRatId().value()).playing=true;
//cout << M->myRatId().value() << endl;
//cout << temp << endl;
M->scoreIs(0);
SetMyRatIndexType(0);
/* Get the multi-cast address ready to use in SendData()
calls. */
memcpy(&groupAddr, &nullAddr, sizeof(Sockaddr));
groupAddr.sin_addr.s_addr = htonl(MAZEGROUP);
}