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ratazzi/gist:4239543

Created December 8, 2012 09:33
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OpenVPN packet header
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gistfile1.txt
src/openvpn/ssl.c
2598-
2599- /* get opcode and key ID */
2600- {
2601- uint8_t c = *BPTR (buf);
2602- op = c >> P_OPCODE_SHIFT;
2603: key_id = c & P_KEY_ID_MASK;
2604- }
src/openvpn/ssl.h
49-
50-/* Used in the TLS PRF function */
51-#define KEY_EXPANSION_ID "OpenVPN"
52-
53-/* packet opcode (high 5 bits) and key-id (low 3 bits) are combined in one byte */
54:#define P_KEY_ID_MASK 0x07
55-#define P_OPCODE_SHIFT 3
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