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Implement new packet parser(s) for WinDivert.

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The new parser should better handle fragments
as well as be consistent with the kernel-mode
parser.  The new parser can also handle truncated
packets.
This commit is contained in:
basil00
2019-08-12 07:50:49 +08:00
parent 6501bec357
commit 317e6f1099
10 changed files with 525 additions and 260 deletions
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test/test_data.c
+53
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@@ -181,3 +181,56 @@ static const unsigned char ipv6_exthdrs_udp[] =
0x72, 0x6c, 0x64, 0x21, 0x01
};
// IPV4 FRAGMENT #0
static const unsigned char ipv4_fragment_0[] =
{
0x45, 0x00, 0x00, 0x1C, 0x12, 0x34, 0x20, 0x00,
0x40, 0x01, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x01,
0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x3c, 0xd2,
0x0d, 0x56, 0x00, 0x01
};
// IPV4 FRAGMENT #1
static const unsigned char ipv4_fragment_1[] =
{
0x45, 0x00, 0x00, 0x4C, 0x12, 0x34, 0x00, 0x01,
0x40, 0x01, 0x00, 0x00, 0x0a, 0x00, 0x00, 0x01,
0x08, 0x08, 0x08, 0x08, 0x8b, 0xa6, 0x60, 0x54,
0x00, 0x00, 0x00, 0x00, 0xf9, 0x08, 0x0a, 0x00,
0x00, 0x00, 0x00, 0x00, 0x10, 0x11, 0x12, 0x13,
0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b,
0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23,
0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b,
0x2c, 0x2d, 0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33,
0x34, 0x35, 0x36, 0x37
};
// IPV6 FRAGMENT #0
static const unsigned char ipv6_fragment_0[] =
{
0x60, 0x00, 0x00, 0x00, 0x00, 0x20, 0x2c, 0x1f,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x3a, 0x00, 0x00, 0x01, 0xc7, 0xf6, 0xce, 0x53,
0x81, 0x00, 0x6e, 0xd6, 0x10, 0x72, 0x00, 0x03,
0xa4, 0xd5, 0x69, 0x54, 0x00, 0x00, 0x00, 0x00,
0xab, 0x75, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};
// IPV6 FRAGMENT #1
static const unsigned char ipv6_fragment_1[] =
{
0x60, 0x00, 0x00, 0x00, 0x00, 0x30, 0x2c, 0x1f,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
0x3a, 0x00, 0x00, 0x18, 0xc7, 0xf6, 0xce, 0x53,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff,
0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77
};