9 #define TCP_MIN_DYNPORT 0x1000
10 #define TCP_MAX_HALFOPEN 1024 // Should be enough
13 void TCP_Initialise();
14 void TCP_StartConnection(tTCPConnection *Conn);
15 void TCP_SendPacket( tTCPConnection *Conn, size_t Length, tTCPHeader *Data );
16 void TCP_GetPacket(tInterface *Interface, void *Address, int Length, void *Buffer);
17 void TCP_INT_HandleConnectionPacket(tTCPConnection *Connection, tTCPHeader *Header);
18 Uint16 TCP_GetUnusedPort();
19 int TCP_AllocatePort(Uint16 Port);
20 int TCP_DeallocatePort(Uint16 Port);
22 tVFS_Node *TCP_Server_Init(tInterface *Interface);
23 char *TCP_Server_ReadDir(tVFS_Node *Node, int Pos);
24 tVFS_Node *TCP_Server_FindDir(tVFS_Node *Node, char *Name);
25 int TCP_Server_IOCtl(tVFS_Node *Node, int ID, void *Data);
26 void TCP_Server_Close(tVFS_Node *Node);
28 tVFS_Node *TCP_Client_Init(tInterface *Interface);
29 Uint64 TCP_Client_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
30 Uint64 TCP_Client_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer);
31 int TCP_Client_IOCtl(tVFS_Node *Node, int ID, void *Data);
32 void TCP_Client_Close(tVFS_Node *Node);
35 tSocketFile gTCP_ServerFile = {NULL, "tcps", TCP_Server_Init};
36 tSocketFile gTCP_ClientFile = {NULL, "tcpc", TCP_Client_Init};
39 int giTCP_NumHalfopen = 0;
40 tSpinlock glTCP_Listeners;
41 tTCPListener *gTCP_Listeners;
42 tSpinlock glTCP_OutbountCons;
43 tTCPConnection *gTCP_OutbountCons;
44 Uint32 gaTCP_PortBitmap[0x800];
45 int giTCP_NextOutPort = TCP_MIN_DYNPORT;
49 * \fn void TCP_Initialise()
50 * \brief Initialise the TCP Layer
54 IPStack_AddFile(&gTCP_ServerFile);
55 IPStack_AddFile(&gTCP_ClientFile);
56 IPv4_RegisterCallback(IP4PROT_TCP, TCP_GetPacket);
60 * \brief Open a connection to another host using TCP
62 void TCP_StartConnection(tTCPConnection *Conn)
66 hdr.SourcePort = Conn->LocalPort;
67 hdr.DestPort = Conn->RemotePort;
68 Conn->NextSequenceSend = rand();
69 hdr.SequenceNumber = Conn->NextSequenceSend;
70 hdr.DataOffset = (sizeof(tTCPHeader)+3)/4;
71 hdr.Flags = TCP_FLAG_SYN;
72 hdr.WindowSize = 0; // TODO
73 hdr.Checksum = 0; // TODO
74 hdr.UrgentPointer = 0;
76 TCP_SendPacket( Conn, sizeof(tTCPHeader), &hdr );
81 * \brief Sends a packet from the specified connection, calculating the checksums
82 * \param Conn Connection
83 * \param Length Length of data
84 * \param Data Packet data
86 void TCP_SendPacket( tTCPConnection *Conn, size_t Length, tTCPHeader *Data )
90 switch( Conn->Interface->Type )
92 case 4: // Append IPv4 Pseudo Header
93 buflen = 4 + 4 + 4 + ((Length+1)&1);
94 buf = malloc( buflen );
95 buf[0] = Conn->Interface->IP4.Address.L;
96 buf[1] = Conn->RemoteIP.v4.L;
97 buf[2] = (htons(Length)<<16) | (6<<8) | 0;
99 memcpy( &buf[3], Data, Length );
100 Data->Checksum = IPv4_Checksum( buf, buflen );
102 IPv4_SendPacket(Conn->Interface, Conn->RemoteIP.v4, IP4PROT_TCP, 0, buflen, buf);
108 * \fn void TCP_GetPacket(tInterface *Interface, void *Address, int Length, void *Buffer)
109 * \brief Handles a packet from the IP Layer
111 void TCP_GetPacket(tInterface *Interface, void *Address, int Length, void *Buffer)
113 tTCPHeader *hdr = Buffer;
115 tTCPConnection *conn;
117 Log("[TCP ] sizeof(tTCPHeader) = %i", sizeof(tTCPHeader));
118 Log("[TCP ] DestPort = %i", ntohs(hdr->DestPort));
119 Log("[TCP ] DestPort = %i", ntohs(hdr->DestPort));
120 Log("[TCP ] SequenceNumber = %i", ntohl(hdr->SequenceNumber));
121 Log("[TCP ] AcknowlegementNumber = %i", ntohl(hdr->AcknowlegementNumber));
122 Log("[TCP ] DataOffset = %i", hdr->DataOffset >> 4);
123 Log("[TCP ] Flags = {");
124 Log("[TCP ] CWR = %B", !!(hdr->Flags & TCP_FLAG_CWR));
125 Log("[TCP ] ECE = %B", !!(hdr->Flags & TCP_FLAG_ECE));
126 Log("[TCP ] URG = %B", !!(hdr->Flags & TCP_FLAG_URG));
127 Log("[TCP ] ACK = %B", !!(hdr->Flags & TCP_FLAG_ACK));
128 Log("[TCP ] PSH = %B", !!(hdr->Flags & TCP_FLAG_PSH));
129 Log("[TCP ] RST = %B", !!(hdr->Flags & TCP_FLAG_RST));
130 Log("[TCP ] SYN = %B", !!(hdr->Flags & TCP_FLAG_SYN));
131 Log("[TCP ] FIN = %B", !!(hdr->Flags & TCP_FLAG_FIN));
133 Log("[TCP ] WindowSize = %i", htons(hdr->WindowSize));
134 Log("[TCP ] Checksum = 0x%x", htons(hdr->Checksum));
135 Log("[TCP ] UrgentPointer = 0x%x", htons(hdr->UrgentPointer));
139 for( srv = gTCP_Listeners; srv; srv = srv->Next )
141 // Check if the server is active
142 if(srv->Port == 0) continue;
143 // Check the interface
144 if(srv->Interface && srv->Interface != Interface) continue;
145 // Check the destination port
146 if(srv->Port != hdr->DestPort) continue;
148 // Is this in an established connection?
149 for( conn = srv->Connections; conn; conn = conn->Next )
151 // Check that it is coming in on the same interface
152 if(conn->Interface != Interface) continue;
155 if(conn->RemotePort != hdr->SourcePort) continue;
158 if(conn->Interface->Type == 6 && !IP6_EQU(conn->RemoteIP.v6, *(tIPv6*)Address))
160 if(conn->Interface->Type == 4 && !IP4_EQU(conn->RemoteIP.v4, *(tIPv4*)Address))
163 // We have a response!
164 TCP_INT_HandleConnectionPacket(conn, hdr);
169 // Open a new connection (well, check that it's a SYN)
177 // Check Open Connections
179 for( conn = gTCP_OutbountCons; conn; conn = conn->Next )
181 // Check that it is coming in on the same interface
182 if(conn->Interface != Interface) continue;
185 if(conn->RemotePort != hdr->SourcePort) continue;
188 if(conn->Interface->Type == 6 && !IP6_EQU(conn->RemoteIP.v6, *(tIPv6*)Address))
190 if(conn->Interface->Type == 4 && !IP4_EQU(conn->RemoteIP.v4, *(tIPv4*)Address))
193 TCP_INT_HandleConnectionPacket(conn, hdr);
199 * \brief Handles a packet sent to a specific connection
201 void TCP_INT_HandleConnectionPacket(tTCPConnection *Connection, tTCPHeader *Header)
207 * \fn Uint16 TCP_GetUnusedPort()
208 * \brief Gets an unused port and allocates it
210 Uint16 TCP_GetUnusedPort()
214 // Get Next outbound port
215 ret = giTCP_NextOutPort++;
216 while( gaTCP_PortBitmap[ret/32] & (1 << (ret%32)) )
220 if(giTCP_NextOutPort == 0x10000) {
221 ret = giTCP_NextOutPort = TCP_MIN_DYNPORT;
225 // Mark the new port as used
226 gaTCP_PortBitmap[ret/32] |= 1 << (ret%32);
232 * \fn int TCP_AllocatePort(Uint16 Port)
233 * \brief Marks a port as used
235 int TCP_AllocatePort(Uint16 Port)
237 // Check if the port has already been allocated
238 if( gaTCP_PortBitmap[Port/32] & (1 << (Port%32)) )
242 gaTCP_PortBitmap[Port/32] |= 1 << (Port%32);
248 * \fn int TCP_DeallocatePort(Uint16 Port)
249 * \brief Marks a port as unused
251 int TCP_DeallocatePort(Uint16 Port)
253 // Check if the port has already been allocated
254 if( !(gaTCP_PortBitmap[Port/32] & (1 << (Port%32))) )
258 gaTCP_PortBitmap[Port/32] &= ~(1 << (Port%32));
264 tVFS_Node *TCP_Server_Init(tInterface *Interface)
266 tTCPListener *srv = malloc( sizeof(tTCPListener) );
268 srv->Interface = Interface;
271 srv->Connections = NULL;
273 srv->Node.ImplPtr = srv;
274 srv->Node.NumACLs = 1;
275 srv->Node.ACLs = &gVFS_ACL_EveryoneRW;
276 srv->Node.ReadDir = TCP_Server_ReadDir;
277 srv->Node.FindDir = TCP_Server_FindDir;
278 srv->Node.IOCtl = TCP_Server_IOCtl;
279 srv->Node.Close = TCP_Server_Close;
281 LOCK(&glTCP_Listeners);
282 srv->Next = gTCP_Listeners;
283 gTCP_Listeners = srv;
284 RELEASE(&glTCP_Listeners);
290 * \brief Wait for a new connection and return the connection ID
291 * \note Blocks until a new connection is made
292 * \param Node Server node
293 * \param Pos Position (ignored)
295 char *TCP_Server_ReadDir(tVFS_Node *Node, int Pos)
297 tTCPListener *srv = Node->ImplPtr;
298 tTCPConnection *conn;
301 while( srv->NewConnections == NULL ) Threads_Yield();
303 conn = srv->NewConnections;
304 srv->NewConnections = conn->Next;
307 itoa(ret, Node->ImplInt, 16, '0', 8);
312 * \brief Gets a client connection node
313 * \param Node Server node
314 * \param Name Hexadecimal ID of the node
316 tVFS_Node *TCP_Server_FindDir(tVFS_Node *Node, char *Name)
321 int TCP_Server_IOCtl(tVFS_Node *Node, int ID, void *Data)
323 tTCPListener *srv = Node->ImplPtr;
327 case 4: // Get/Set Port
328 if(!Data) // Get Port
331 if(srv->Port) // Wait, you can't CHANGE the port
334 if(!CheckMem(Data, sizeof(Uint16))) // Sanity check
338 if(Threads_GetUID() != 0
339 && *(Uint16*)Data != 0
340 && *(Uint16*)Data < 1024)
343 // TODO: Check if a port is in use
346 srv->Port = *(Uint16*)Data;
347 if(srv->Port == 0) // Allocate a random port
348 srv->Port = TCP_GetUnusedPort();
349 else // Else, mark this as used
350 TCP_AllocatePort(srv->Port);
356 void TCP_Server_Close(tVFS_Node *Node)
362 tVFS_Node *TCP_Client_Init(tInterface *Interface)
364 tTCPConnection *conn = malloc( sizeof(tTCPConnection) );
366 conn->State = TCP_ST_CLOSED;
367 conn->Interface = Interface;
369 conn->RemotePort = 0;
370 memset( &conn->RemoteIP, 0, sizeof(conn->RemoteIP) );
372 conn->Node.ImplPtr = conn;
373 conn->Node.NumACLs = 1;
374 conn->Node.ACLs = &gVFS_ACL_EveryoneRW;
375 conn->Node.Read = TCP_Client_Read;
376 conn->Node.Write = TCP_Client_Write;
377 conn->Node.IOCtl = TCP_Client_IOCtl;
378 conn->Node.Close = TCP_Client_Close;
380 LOCK(&glTCP_OutbountCons);
381 conn->Next = gTCP_OutbountCons;
382 gTCP_OutbountCons = conn;
383 RELEASE(&glTCP_OutbountCons);
388 Uint64 TCP_Client_Read(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
393 Uint64 TCP_Client_Write(tVFS_Node *Node, Uint64 Offset, Uint64 Length, void *Buffer)
399 * \brief Control a client socket
401 int TCP_Client_IOCtl(tVFS_Node *Node, int ID, void *Data)
403 tTCPConnection *conn = Node->ImplPtr;
407 case 4: // Get/Set local port
409 return conn->LocalPort;
410 if(conn->State != TCP_ST_CLOSED)
412 if(!CheckMem(Data, sizeof(Uint16)))
415 if(Threads_GetUID() != 0 && *(Uint16*)Data < 1024)
418 conn->LocalPort = *(Uint16*)Data;
421 case 5: // Get/Set remote port
422 if(!Data) return conn->RemotePort;
423 if(conn->State != TCP_ST_CLOSED) return -1;
424 if(!CheckMem(Data, sizeof(Uint16))) return -1;
425 conn->RemotePort = *(Uint16*)Data;
428 case 6: // Set Remote IP
429 if( conn->State != TCP_ST_CLOSED )
431 if( conn->Interface->Type == 4 )
433 if(!CheckMem(Data, sizeof(tIPv4))) return -1;
434 conn->RemoteIP.v4 = *(tIPv4*)Data;
436 else if( conn->Interface->Type == 6 )
438 if(!CheckMem(Data, sizeof(tIPv6))) return -1;
439 conn->RemoteIP.v6 = *(tIPv6*)Data;
444 if(conn->LocalPort == -1)
445 conn->LocalPort = TCP_GetUnusedPort();
446 if(conn->RemotePort == -1)
449 TCP_StartConnection(conn);
456 void TCP_Client_Close(tVFS_Node *Node)