2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS TCP/IP protocol driver
4 * FILE: transport/rawip/rawip.c
5 * PURPOSE: User Datagram Protocol routines
6 * PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
8 * CSH 01/08-2000 Created
13 NTSTATUS
AddGenericHeaderIPv4(
14 PIP_ADDRESS RemoteAddress
,
16 PIP_ADDRESS LocalAddress
,
24 * FUNCTION: Adds an IPv4 and RawIp header to an IP packet
26 * SendRequest = Pointer to send request
27 * LocalAddress = Pointer to our local address
28 * LocalPort = The port we send this datagram from
29 * IPPacket = Pointer to IP packet
34 PIPv4_HEADER IPHeader
;
37 TI_DbgPrint(MID_TRACE
, ("Packet: %x NdisPacket %x\n",
38 IPPacket
, IPPacket
->NdisPacket
));
40 BufferSize
= MaxLLHeaderSize
+ sizeof(IPv4_HEADER
) + ExtraLength
;
42 GetDataPtr( IPPacket
->NdisPacket
,
44 (PCHAR
*)&IPPacket
->Header
,
45 &IPPacket
->ContigSize
);
47 IPPacket
->HeaderSize
= 20;
49 TI_DbgPrint(MAX_TRACE
, ("Allocated %d bytes for headers at 0x%X.\n",
50 BufferSize
, IPPacket
->Header
));
51 TI_DbgPrint(MAX_TRACE
, ("Packet total length %d\n", IPPacket
->TotalSize
));
53 /* Build IPv4 header */
54 IPHeader
= (PIPv4_HEADER
)IPPacket
->Header
;
55 /* Version = 4, Length = 5 DWORDs */
56 IPHeader
->VerIHL
= 0x45;
57 /* Normal Type-of-Service */
59 /* Length of header and data */
60 IPHeader
->TotalLength
= WH2N((USHORT
)IPPacket
->TotalSize
);
63 /* One fragment at offset 0 */
64 IPHeader
->FlagsFragOfs
= 0;
65 /* Time-to-Live is 128 */
67 /* User Datagram Protocol */
68 IPHeader
->Protocol
= Protocol
;
69 /* Checksum is 0 (for later calculation of this) */
70 IPHeader
->Checksum
= 0;
72 IPHeader
->SrcAddr
= LocalAddress
->Address
.IPv4Address
;
73 /* Destination address. FIXME: IPv4 only */
74 IPHeader
->DstAddr
= RemoteAddress
->Address
.IPv4Address
;
76 /* Build RawIp header */
77 *NextHeader
= (((PCHAR
)IPHeader
) + sizeof(IPv4_HEADER
));
78 IPPacket
->Data
= ((PCHAR
)*NextHeader
) + ExtraLength
;
80 return STATUS_SUCCESS
;
84 NTSTATUS
BuildRawIpPacket(
86 PIP_ADDRESS RemoteAddress
,
88 PIP_ADDRESS LocalAddress
,
93 * FUNCTION: Builds an RawIp packet
95 * Context = Pointer to context information (DATAGRAM_SEND_REQUEST)
96 * LocalAddress = Pointer to our local address
97 * LocalPort = The port we send this datagram from
98 * IPPacket = Address of pointer to IP packet
100 * Status of operation
106 TI_DbgPrint(MAX_TRACE
, ("Called.\n"));
108 /* FIXME: Assumes IPv4 */
109 IPInitializePacket(Packet
, IP_ADDRESS_V4
);
111 return STATUS_INSUFFICIENT_RESOURCES
;
113 Packet
->TotalSize
= sizeof(IPv4_HEADER
) + DataLen
;
116 Status
= AllocatePacketWithBuffer( &Packet
->NdisPacket
,
118 Packet
->TotalSize
+ MaxLLHeaderSize
);
120 if( !NT_SUCCESS(Status
) ) return Status
;
122 TI_DbgPrint(MID_TRACE
, ("Allocated packet: %x\n", Packet
->NdisPacket
));
123 TI_DbgPrint(MID_TRACE
, ("Local Addr : %s\n", A2S(LocalAddress
)));
124 TI_DbgPrint(MID_TRACE
, ("Remote Addr: %s\n", A2S(RemoteAddress
)));
126 switch (RemoteAddress
->Type
) {
128 Status
= AddGenericHeaderIPv4
129 (RemoteAddress
, RemotePort
,
130 LocalAddress
, LocalPort
, Packet
, DataLen
,
131 IPPROTO_ICMP
, /* XXX Figure out a better way to do this */
132 0, (PVOID
*)&Payload
);
135 /* FIXME: Support IPv6 */
136 Status
= STATUS_UNSUCCESSFUL
;
137 TI_DbgPrint(MIN_TRACE
, ("IPv6 RawIp datagrams are not supported.\n"));
141 Status
= STATUS_UNSUCCESSFUL
;
142 TI_DbgPrint(MIN_TRACE
, ("Bad Address Type %d\n", RemoteAddress
->Type
));
146 TI_DbgPrint(MID_TRACE
, ("Copying data (hdr %x data %x (%d))\n",
147 Packet
->Header
, Packet
->Data
,
148 (PCHAR
)Packet
->Data
- (PCHAR
)Packet
->Header
));
150 RtlCopyMemory( Packet
->Data
, DataBuffer
, DataLen
);
152 TI_DbgPrint(MID_TRACE
, ("Displaying packet\n"));
154 DISPLAY_IP_PACKET(Packet
);
156 TI_DbgPrint(MID_TRACE
, ("Leaving\n"));
158 return STATUS_SUCCESS
;
161 VOID RawIpSendPacketComplete
162 ( PVOID Context
, PNDIS_PACKET Packet
, NDIS_STATUS Status
) {
163 FreeNdisPacket( Packet
);
166 NTSTATUS
RawIPSendDatagram(
167 PADDRESS_FILE AddrFile
,
168 PTDI_CONNECTION_INFORMATION ConnInfo
,
173 * FUNCTION: Sends an RawIp datagram to a remote address
175 * Request = Pointer to TDI request
176 * ConnInfo = Pointer to connection information
177 * Buffer = Pointer to NDIS buffer with data
178 * DataSize = Size in bytes of data to be sent
180 * Status of operation
184 PTA_IP_ADDRESS RemoteAddressTa
= (PTA_IP_ADDRESS
)ConnInfo
->RemoteAddress
;
185 IP_ADDRESS RemoteAddress
;
188 PNEIGHBOR_CACHE_ENTRY NCE
;
190 TI_DbgPrint(MID_TRACE
,("Sending Datagram(%x %x %x %d)\n",
191 AddrFile
, ConnInfo
, BufferData
, DataSize
));
192 TI_DbgPrint(MID_TRACE
,("RemoteAddressTa: %x\n", RemoteAddressTa
));
194 switch( RemoteAddressTa
->Address
[0].AddressType
) {
195 case TDI_ADDRESS_TYPE_IP
:
196 RemoteAddress
.Type
= IP_ADDRESS_V4
;
197 RemoteAddress
.Address
.IPv4Address
=
198 RemoteAddressTa
->Address
[0].Address
[0].in_addr
;
199 RemotePort
= RemoteAddressTa
->Address
[0].Address
[0].sin_port
;
203 return STATUS_UNSUCCESSFUL
;
206 Status
= BuildRawIpPacket( &Packet
,
214 if( !NT_SUCCESS(Status
) )
217 TI_DbgPrint(MID_TRACE
,("About to get route to destination\n"));
219 if(!(NCE
= RouteGetRouteToDestination( &RemoteAddress
)))
220 return STATUS_UNSUCCESSFUL
;
222 TI_DbgPrint(MID_TRACE
,("About to send datagram\n"));
224 IPSendDatagram( &Packet
, NCE
, RawIpSendPacketComplete
, NULL
);
226 TI_DbgPrint(MID_TRACE
,("Leaving\n"));
228 return STATUS_SUCCESS
;
232 VOID
RawIpReceive(PIP_INTERFACE Interface
, PIP_PACKET IPPacket
)
234 * FUNCTION: Receives and queues a RawIp datagram
236 * NTE = Pointer to net table entry which the packet was received on
237 * IPPacket = Pointer to an IP packet that was received
239 * This is the low level interface for receiving RawIp datagrams. It strips
240 * the RawIp header from a packet and delivers the data to anyone that wants it
243 AF_SEARCH SearchContext
;
244 PIPv4_HEADER IPv4Header
;
245 PADDRESS_FILE AddrFile
;
246 PIP_ADDRESS DstAddress
, SrcAddress
;
249 TI_DbgPrint(MAX_TRACE
, ("Called.\n"));
251 switch (IPPacket
->Type
) {
254 IPv4Header
= IPPacket
->Header
;
255 DstAddress
= &IPPacket
->DstAddr
;
256 SrcAddress
= &IPPacket
->SrcAddr
;
257 DataSize
= IPPacket
->TotalSize
;
262 TI_DbgPrint(MIN_TRACE
, ("Discarded IPv6 datagram (%i bytes).\n", IPPacket
->TotalSize
));
264 /* FIXME: IPv6 is not supported */
271 /* Locate a receive request on destination address file object
272 and deliver the packet if one is found. If there is no receive
273 request on the address file object, call the associated receive
274 handler. If no receive handler is registered, drop the packet */
276 AddrFile
= AddrSearchFirst(DstAddress
,
278 IPv4Header
->Protocol
,
282 DGDeliverData(AddrFile
,
289 } while ((AddrFile
= AddrSearchNext(&SearchContext
)) != NULL
);
291 /* There are no open address files that will take this datagram */
292 /* FIXME: IPv4 only */
293 TI_DbgPrint(MID_TRACE
, ("Cannot deliver IPv4 raw datagram to address (0x%X).\n",
294 DN2H(DstAddress
->Address
.IPv4Address
)));
296 /* FIXME: Send ICMP reply */
298 TI_DbgPrint(MAX_TRACE
, ("Leaving.\n"));
302 NTSTATUS
RawIPStartup(VOID
)
304 * FUNCTION: Initializes the UDP subsystem
306 * Status of operation
310 RtlZeroMemory(&UDPStats
, sizeof(UDP_STATISTICS
));
313 /* Register this protocol with IP layer */
314 IPRegisterProtocol(IPPROTO_ICMP
, RawIpReceive
);
316 return STATUS_SUCCESS
;
320 NTSTATUS
RawIPShutdown(VOID
)
322 * FUNCTION: Shuts down the UDP subsystem
324 * Status of operation
327 /* Deregister this protocol with IP layer */
328 IPRegisterProtocol(IPPROTO_ICMP
, NULL
);
330 return STATUS_SUCCESS
;