1 /*
2 * Contains common Ethernet-related definition, not defined in NDIS
3 *
4 * Copyright (c) 2008-2017 Red Hat, Inc.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met :
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and / or other materials provided with the distribution.
14 * 3. Neither the names of the copyright holders nor the names of their contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29 #ifndef _ETHERNET_UTILS_H
30 #define _ETHERNET_UTILS_H
31
32 // assuming <ndis.h> included
33
34
35 #define ETH_IS_LOCALLY_ADMINISTERED(Address) \
36 (BOOLEAN)(((PUCHAR)(Address))[0] & ((UCHAR)0x02))
37
38 #define ETH_IS_EMPTY(Address) \
39 ((((PUCHAR)(Address))[0] == ((UCHAR)0x00)) && (((PUCHAR)(Address))[1] == ((UCHAR)0x00)) && (((PUCHAR)(Address))[2] == ((UCHAR)0x00)) && (((PUCHAR)(Address))[3] == ((UCHAR)0x00)) && (((PUCHAR)(Address))[4] == ((UCHAR)0x00)) && (((PUCHAR)(Address))[5] == ((UCHAR)0x00)))
40
41 #define ETH_HAS_PRIO_HEADER(Address) \
42 (((PUCHAR)(Address))[12] == ((UCHAR)0x81) && ((PUCHAR)(Address))[13] == ((UCHAR)0x00))
43
44 #include <pshpack1.h>
45 typedef struct _ETH_HEADER
46 {
47 UCHAR DstAddr[ETH_LENGTH_OF_ADDRESS];
48 UCHAR SrcAddr[ETH_LENGTH_OF_ADDRESS];
49 USHORT EthType;
50 } ETH_HEADER, *PETH_HEADER;
51 #include <poppack.h>
52
53 #define ETH_HEADER_SIZE (sizeof(ETH_HEADER))
54 #define ETH_MIN_PACKET_SIZE 60
55 #define ETH_PRIORITY_HEADER_OFFSET 12
56 #define ETH_PRIORITY_HEADER_SIZE 4
57
58
SetPriorityData(UCHAR * pDest,ULONG priority,ULONG VlanID)59 static void FORCEINLINE SetPriorityData(UCHAR *pDest, ULONG priority, ULONG VlanID)
60 {
61 pDest[0] = 0x81;
62 pDest[2] = (UCHAR)(priority << 5);
63 pDest[2] |= (UCHAR)(VlanID >> 8);
64 pDest[3] |= (UCHAR)VlanID;
65 }
66
67 typedef enum _tag_eInspectedPacketType
68 {
69 iptUnicast,
70 iptBroadcast,
71 iptMulticast,
72 iptInvalid
73 }eInspectedPacketType;
74
75 // IP Header RFC 791
76 typedef struct _tagIPv4Header {
77 UCHAR ip_verlen; // length in 32-bit units(low nibble), version (high nibble)
78 UCHAR ip_tos; // Type of service
79 USHORT ip_length; // Total length
80 USHORT ip_id; // Identification
81 USHORT ip_offset; // fragment offset and flags
82 UCHAR ip_ttl; // Time to live
83 UCHAR ip_protocol; // Protocol
84 USHORT ip_xsum; // Header checksum
85 ULONG ip_src; // Source IP address
86 ULONG ip_dest; // Destination IP address
87 } IPv4Header;
88
89 // TCP header RFC 793
90 typedef struct _tagTCPHeader {
91 USHORT tcp_src; // Source port
92 USHORT tcp_dest; // Destination port
93 ULONG tcp_seq; // Sequence number
94 ULONG tcp_ack; // Ack number
95 USHORT tcp_flags; // header length and flags
96 USHORT tcp_window; // Window size
97 USHORT tcp_xsum; // Checksum
98 USHORT tcp_urgent; // Urgent
99 }TCPHeader;
100
101
102 // UDP Header RFC 768
103 typedef struct _tagUDPHeader {
104 USHORT udp_src; // Source port
105 USHORT udp_dest; // Destination port
106 USHORT udp_length; // length of datagram
107 USHORT udp_xsum; // checksum
108 }UDPHeader;
109
110
111
112 #define TCP_CHECKSUM_OFFSET 16
113 #define UDP_CHECKSUM_OFFSET 6
114 #define MAX_IPV4_HEADER_SIZE 60
115 #define MAX_TCP_HEADER_SIZE 60
116
swap_short(USHORT us)117 static __inline USHORT swap_short(USHORT us)
118 {
119 return (us << 8) | (us >> 8);
120 }
121
122
123 #endif
124