bool CNetServer::Open(NETADDR BindAddr, CNetBan *pNetBan, int MaxClients, int MaxClientsPerIP, int Flags)
{
// zero out the whole structure
mem_zero(this, sizeof(*this));
// open socket
m_Socket = net_udp_create(BindAddr);
if(!m_Socket.type)
return false;
m_pNetBan = pNetBan;
// clamp clients
m_MaxClients = MaxClients;
if(m_MaxClients > NET_MAX_CLIENTS)
m_MaxClients = NET_MAX_CLIENTS;
if(m_MaxClients < 1)
m_MaxClients = 1;
m_MaxClientsPerIP = MaxClientsPerIP;
for(int i = 0; i < NET_MAX_CLIENTS; i++)
m_aSlots[i].m_Connection.Init(m_Socket, true);
return true;
}
bool CNetServer::Open(NETADDR BindAddr, CNetBan *pNetBan, int MaxClients, int MaxClientsPerIP, int Flags)
{
// zero out the whole structure
mem_zero(this, sizeof(*this));
// open socket
m_Socket = net_udp_create(BindAddr);
if(!m_Socket.type)
return false;
m_pNetBan = pNetBan;
// clamp clients
m_MaxClients = MaxClients;
if(m_MaxClients > NET_MAX_CLIENTS)
m_MaxClients = NET_MAX_CLIENTS;
if(m_MaxClients < 1)
m_MaxClients = 1;
m_MaxClientsPerIP = MaxClientsPerIP;
m_NumConAttempts = 0;
m_TimeNumConAttempts = time_get();
m_VConnHighLoad = false;
m_VConnNum = 0;
m_VConnFirst = 0;
secure_random_fill(m_SecurityTokenSeed, sizeof(m_SecurityTokenSeed));
for(int i = 0; i < NET_MAX_CLIENTS; i++)
m_aSlots[i].m_Connection.Init(m_Socket, true);
return true;
}
NETSERVER *netserver_open(NETADDR bindaddr, int max_clients, int flags)
{
int i;
NETSERVER *server;
NETSOCKET socket = net_udp_create(bindaddr);
if(socket == NETSOCKET_INVALID)
return 0;
server = (NETSERVER *)mem_alloc(sizeof(NETSERVER), 1);
mem_zero(server, sizeof(NETSERVER));
server->socket = socket;
server->max_clients = max_clients;
if(server->max_clients > NET_MAX_CLIENTS)
server->max_clients = NET_MAX_CLIENTS;
if(server->max_clients < 1)
server->max_clients = 1;
for(i = 0; i < NET_MAX_CLIENTS; i++)
conn_init(&server->slots[i].conn, server->socket);
/* setup all pointers for bans */
for(i = 1; i < NET_SERVER_MAXBANS-1; i++)
{
server->banpool[i].next = &server->banpool[i+1];
server->banpool[i].prev = &server->banpool[i-1];
}
server->banpool[0].next = &server->banpool[1];
server->banpool[NET_SERVER_MAXBANS-1].prev = &server->banpool[NET_SERVER_MAXBANS-2];
server->banpool_firstfree = &server->banpool[0];
return server;
}
bool CNetServer::Open(NETADDR BindAddr, int MaxClients, int MaxClientsPerIP, int Flags)
{
// zero out the whole structure
mem_zero(this, sizeof(*this));
// open socket
m_Socket = net_udp_create(BindAddr);
if(!m_Socket.type)
return false;
// clamp clients
m_MaxClients = MaxClients;
if(m_MaxClients > NET_MAX_CLIENTS)
m_MaxClients = NET_MAX_CLIENTS;
if(m_MaxClients < 1)
m_MaxClients = 1;
m_MaxClientsPerIP = MaxClientsPerIP;
for(int i = 0; i < NET_MAX_CLIENTS; i++)
m_aSlots[i].m_Connection.Init(m_Socket);
// setup all pointers for bans
for(int i = 1; i < NET_SERVER_MAXBANS-1; i++)
{
m_BanPool[i].m_pNext = &m_BanPool[i+1];
m_BanPool[i].m_pPrev = &m_BanPool[i-1];
}
m_BanPool[0].m_pNext = &m_BanPool[1];
m_BanPool[NET_SERVER_MAXBANS-1].m_pPrev = &m_BanPool[NET_SERVER_MAXBANS-2];
m_BanPool_FirstFree = &m_BanPool[0];
return true;
}
bool CNetClient::Open(NETADDR BindAddr, int Flags)
{
// clean it
mem_zero(this, sizeof(*this));
// open socket
m_Socket = net_udp_create(BindAddr);
m_Connection.Init(m_Socket);
return true;
}
bool CNetServer::Open(NETADDR BindAddr, CNetBan *pNetBan, int MaxClients, int MaxClientsPerIP, int Flags)
{
// zero out the whole structure
mem_zero(this, sizeof(*this));
// open socket
m_Socket = net_udp_create(BindAddr);
if(!m_Socket.type)
return false;
m_pNetBan = pNetBan;
// clamp clients
m_MaxClients = MaxClients;
if(m_MaxClients > NET_MAX_CLIENTS)
m_MaxClients = NET_MAX_CLIENTS;
if(m_MaxClients < 1)
m_MaxClients = 1;
m_MaxClientsPerIP = MaxClientsPerIP;
IOHANDLE urandom = io_open("/dev/urandom", IOFLAG_READ);
if (urandom) {
io_read(urandom, m_SecurityTokenSeed, sizeof(m_SecurityTokenSeed));
io_close(urandom);
}
else
{
dbg_msg("security", "/dev/urandom is not available. using sv_rcon_password for security token seed, make sure you have a long password!");
str_copy(m_SecurityTokenSeed, g_Config.m_SvRconPassword, sizeof(m_SecurityTokenSeed));
long timestamp = time_get();
md5_state_t md5;
md5_byte_t digest[16];
// do over 9000 rounds of md5 on the rcon password, to make it harder to recover the password from the token values
for (int i = 0; i < 1000000; i++)
{
md5_init(&md5);
md5_append(&md5, (unsigned char*)m_SecurityTokenSeed, sizeof(m_SecurityTokenSeed));
md5_append(&md5, (unsigned char*)×tamp, sizeof(timestamp));
md5_finish(&md5, digest);
mem_copy(m_SecurityTokenSeed, digest, sizeof(m_SecurityTokenSeed) < sizeof(digest) ? sizeof(m_SecurityTokenSeed) : sizeof(digest));
}
}
for(int i = 0; i < NET_MAX_CLIENTS; i++)
m_aSlots[i].m_Connection.Init(m_Socket, true);
return true;
}
bool CNetClient::Open(NETADDR BindAddr, int Flags)
{
// open socket
NETSOCKET Socket;
Socket = net_udp_create(BindAddr);
if(!Socket.type)
return false;
// clean it
mem_zero(this, sizeof(*this));
// init
m_Socket = Socket;
m_Connection.Init(m_Socket, false);
return true;
}
bool CNetClient::Open(NETADDR BindAddr, int Flags)
{
// open socket
NETSOCKET Socket;
Socket = net_udp_create(BindAddr, (Flags&NETCREATE_FLAG_RANDOMPORT) ? 1 : 0);
if(!Socket.type)
return false;
// clean it
mem_zero(this, sizeof(*this));
// init
m_Socket = Socket;
m_Connection.Init(m_Socket, false);
m_TokenManager.Init(Socket);
m_TokenCache.Init(Socket, &m_TokenManager);
m_Flags = Flags;
return true;
}
int run(NETADDR dest)
{
NETSOCKET sockets[NUM_SOCKETS];
int i;
for(i = 0; i < NUM_SOCKETS; i++)
{
NETADDR bindaddr = {NETTYPE_IPV4, {0}, 0};
sockets[i] = net_udp_create(bindaddr);
}
while(1)
{
unsigned char data[1024];
int size = 0;
int socket_to_use = 0;
io_read(io_stdin(), &size, 2);
io_read(io_stdin(), &socket_to_use, 1);
size %= 256;
socket_to_use %= NUM_SOCKETS;
io_read(io_stdin(), data, size);
net_udp_send(sockets[socket_to_use], &dest, data, size);
}
}
void Run(int Port, NETADDR Dest)
{
NETADDR Src = {NETTYPE_IPV4, {0,0,0,0}, Port};
NETSOCKET Socket = net_udp_create(Src);
char aBuffer[1024*2];
int ID = 0;
int Delaycounter = 0;
while(1)
{
static int Lastcfg = 0;
int n = ((time_get()/time_freq())/m_ConfigInterval) % m_ConfigNumpingconfs;
CPingConfig Ping = m_aConfigPings[n];
if(n != Lastcfg)
dbg_msg("crapnet", "cfg = %d", n);
Lastcfg = n;
// handle incomming packets
while(1)
{
// fetch data
int DataTrash = 0;
NETADDR From;
int Bytes = net_udp_recv(Socket, &From, aBuffer, 1024*2);
if(Bytes <= 0)
break;
if((rand()%100) < Ping.m_Loss) // drop the packet
{
if(m_ConfigLog)
dbg_msg("crapnet", "dropped packet");
continue;
}
// create new packet
CPacket *p = (CPacket *)mem_alloc(sizeof(CPacket)+Bytes, 1);
if(net_addr_comp(&From, &Dest) == 0)
p->m_SendTo = Src; // from the server
else
{
Src = From; // from the client
p->m_SendTo = Dest;
}
// queue packet
p->m_pPrev = m_pLast;
p->m_pNext = 0;
if(m_pLast)
m_pLast->m_pNext = p;
else
{
m_pFirst = p;
m_pLast = p;
}
m_pLast = p;
// set data in packet
p->m_Timestamp = time_get();
p->m_DataSize = Bytes;
p->m_ID = ID++;
mem_copy(p->m_aData, aBuffer, Bytes);
if(ID > 20 && Bytes > 6 && DataTrash)
{
p->m_aData[6+(rand()%(Bytes-6))] = rand()&255; // modify a byte
if((rand()%10) == 0)
{
p->m_DataSize -= rand()%32;
if(p->m_DataSize < 6)
p->m_DataSize = 6;
}
}
if(Delaycounter <= 0)
{
if(Ping.m_Delay)
p->m_Timestamp += (time_freq()*1000)/Ping.m_Delay;
Delaycounter = Ping.m_DelayFreq;
}
Delaycounter--;
if(m_ConfigLog)
{
char aAddrStr[NETADDR_MAXSTRSIZE];
net_addr_str(&From, aAddrStr, sizeof(aAddrStr), true);
dbg_msg("crapnet", "<< %08d %s (%d)", p->m_ID, aAddrStr, p->m_DataSize);
}
}
//
/*while(1)
{*/
CPacket *p = 0;
CPacket *pNext = m_pFirst;
while(1)
{
p = pNext;
if(!p)
break;
pNext = p->m_pNext;
if((time_get()-p->m_Timestamp) > m_CurrentLatency)
{
char aFlags[] = " ";
if(m_ConfigReorder && (rand()%2) == 0 && p->m_pNext)
{
aFlags[0] = 'R';
p = m_pFirst->m_pNext;
}
if(p->m_pNext)
p->m_pNext->m_pPrev = p->m_pPrev;
else
m_pLast = p->m_pPrev;
if(p->m_pPrev)
p->m_pPrev->m_pNext = p->m_pNext;
else
m_pFirst = p->m_pNext;
/*CPacket *cur = first;
while(cur)
{
dbg_assert(cur != p, "p still in list");
cur = cur->next;
}*/
// send and remove packet
//if((rand()%20) != 0) // heavy packetloss
net_udp_send(Socket, &p->m_SendTo, p->m_aData, p->m_DataSize);
// update lag
double Flux = rand()/(double)RAND_MAX;
int MsSpike = Ping.m_Spike;
int MsFlux = Ping.m_Flux;
int MsPing = Ping.m_Base;
m_CurrentLatency = ((time_freq()*MsPing)/1000) + (int64)(((time_freq()*MsFlux)/1000)*Flux); // 50ms
if(MsSpike && (p->m_ID%100) == 0)
{
m_CurrentLatency += (time_freq()*MsSpike)/1000;
aFlags[1] = 'S';
}
if(m_ConfigLog)
{
char aAddrStr[NETADDR_MAXSTRSIZE];
net_addr_str(&p->m_SendTo, aAddrStr, sizeof(aAddrStr), true);
dbg_msg("crapnet", ">> %08d %s (%d) %s", p->m_ID, aAddrStr, p->m_DataSize, aFlags);
}
mem_free(p);
}
}
thread_sleep(1);
}
}