[dragonfly.git] / contrib / tcpdump / dccp.h

/* @(#) $Header: /tcpdump/master/tcpdump/dccp.h,v 1.1.2.4 2006/05/12 01:46:17 guy Exp $ (LBL) */
/*
 * Copyright (C) Arnaldo Carvalho de Melo 2004
 * Copyright (C) Ian McDonald 2005 <iam4@cs.waikato.ac.nz>
 * Copyright (C) Yoshifumi Nishida 2005
 *
 * This software may be distributed either under the terms of the
 * BSD-style license that accompanies tcpdump or the GNU GPL version 2
 */

#ifndef __DCCP_HDR__
#define __DCCP_HDR__

/**
 * struct dccp_hdr - generic part of DCCP packet header
 *
 * @dccph_sport - Relevant port on the endpoint that sent this packet
 * @dccph_dport - Relevant port on the other endpoint
 * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
 * @dccph_ccval - Used by the HC-Sender CCID
 * @dccph_cscov - Parts of the packet that are covered by the Checksum field
 * @dccph_checksum - Internet checksum, depends on dccph_cscov
 * @dccph_x - 0 = 24 bit sequence number, 1 = 48
 * @dccph_type - packet type, see DCCP_PKT_ prefixed macros
 * @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x
 */
struct dccp_hdr {
	u_int16_t	dccph_sport,
			dccph_dport;
	u_int8_t	dccph_doff;
	u_int8_t	dccph_ccval_cscov;
	u_int16_t	dccph_checksum;
	union {
	u_int8_t	dccph_xtr;
	u_int32_t	dccph_seq;
	}		dccph_xtrs;
};

#define DCCPH_CCVAL(dh)	(((dh)->dccph_ccval_cscov) & 0x0F)
#define DCCPH_CSCOV(dh)	(((dh)->dccph_ccval_cscov >> 4) & 0x0F)

#define DCCPH_X(dh)	((dh)->dccph_xtrs.dccph_xtr & 1)
#define DCCPH_TYPE(dh)	(((dh)->dccph_xtrs.dccph_xtr >> 1) & 0xF)
#define DCCPH_SEQ(dh)   (((dh)->dccph_xtrs.dccph_seq) >> 8)

/**
 * struct dccp_hdr_ext - the low bits of a 48 bit seq packet
 *
 * @dccph_seq_low - low 24 bits of a 48 bit seq packet
 */
struct dccp_hdr_ext {
	u_int32_t	dccph_seq_low;
};

/**
 * struct dccp_hdr_request - Conection initiation request header
 *
 * @dccph_req_service - Service to which the client app wants to connect
 */
struct dccp_hdr_request {
	u_int32_t	dccph_req_service;
};

/**
 * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets
 *
 * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
 * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
 */
struct dccp_hdr_ack_bits {
	u_int32_t	dccph_ra;
	u_int32_t	dccph_ack_nr_low;
};

#define DCCPH_ACK(dh_ack)   ((dh_ack)->dccph_ra >> 8)

/**
 * struct dccp_hdr_response - Conection initiation response header
 *
 * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
 * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
 * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
 */
struct dccp_hdr_response {
	struct dccp_hdr_ack_bits	dccph_resp_ack;
	u_int32_t			dccph_resp_service;
};

#if 0
static inline struct dccp_hdr_data *dccp_hdr_data(struct dccp_hdr *hdrg)
{
	const int ext = DCCPH_X(hdrg) ? sizeof(struct dccp_hdr_ext) : 0;

	return (struct dccp_hdr_data *)(((u_char *)hdrg) + sizeof(hdrg) + ext);
}
#endif

/**
 * struct dccp_hdr_reset - Unconditionally shut down a connection
 *
 * @dccph_reset_service - Echoes the Service Code on a received DCCP-Request
 */
struct dccp_hdr_reset {
	struct dccp_hdr_ack_bits	dccph_reset_ack;
	u_int8_t			dccph_reset_code,
					dccph_reset_data[3];
};

enum dccp_pkt_type {
	DCCP_PKT_REQUEST = 0,
	DCCP_PKT_RESPONSE,
	DCCP_PKT_DATA,
	DCCP_PKT_ACK,
	DCCP_PKT_DATAACK,
	DCCP_PKT_CLOSEREQ,
	DCCP_PKT_CLOSE,
	DCCP_PKT_RESET,
	DCCP_PKT_SYNC,
	DCCP_PKT_SYNCACK,
	DCCP_PKT_INVALID
};

enum dccp_reset_codes {
	DCCP_RESET_CODE_UNSPECIFIED = 0,
	DCCP_RESET_CODE_CLOSED,
	DCCP_RESET_CODE_ABORTED,
	DCCP_RESET_CODE_NO_CONNECTION,
	DCCP_RESET_CODE_PACKET_ERROR,
	DCCP_RESET_CODE_OPTION_ERROR,
	DCCP_RESET_CODE_MANDATORY_ERROR,
	DCCP_RESET_CODE_CONNECTION_REFUSED,
	DCCP_RESET_CODE_BAD_SERVICE_CODE,
	DCCP_RESET_CODE_TOO_BUSY,
	DCCP_RESET_CODE_BAD_INIT_COOKIE,
	DCCP_RESET_CODE_AGGRESSION_PENALTY,
	__DCCP_RESET_CODE_LAST
};

#endif /* __DCCP_HDR__ */
Commit	Line	Data
c8cf0f94 PA	1	/* @(#) $Header: /tcpdump/master/tcpdump/dccp.h,v 1.1.2.4 2006/05/12 01:46:17 guy Exp $ (LBL) */
	2	/*
	3	* Copyright (C) Arnaldo Carvalho de Melo 2004
	4	* Copyright (C) Ian McDonald 2005 <iam4@cs.waikato.ac.nz>
	5	* Copyright (C) Yoshifumi Nishida 2005
	6	*
	7	* This software may be distributed either under the terms of the
	8	* BSD-style license that accompanies tcpdump or the GNU GPL version 2
	9	*/
	10
	11	#ifndef __DCCP_HDR__
	12	#define __DCCP_HDR__
	13
	14	/**
	15	* struct dccp_hdr - generic part of DCCP packet header
	16	*
	17	* @dccph_sport - Relevant port on the endpoint that sent this packet
	18	* @dccph_dport - Relevant port on the other endpoint
	19	* @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
	20	* @dccph_ccval - Used by the HC-Sender CCID
	21	* @dccph_cscov - Parts of the packet that are covered by the Checksum field
	22	* @dccph_checksum - Internet checksum, depends on dccph_cscov
	23	* @dccph_x - 0 = 24 bit sequence number, 1 = 48
	24	* @dccph_type - packet type, see DCCP_PKT_ prefixed macros
	25	* @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x
	26	*/
	27	struct dccp_hdr {
	28	u_int16_t dccph_sport,
	29	dccph_dport;
	30	u_int8_t dccph_doff;
	31	u_int8_t dccph_ccval_cscov;
	32	u_int16_t dccph_checksum;
	33	union {
	34	u_int8_t dccph_xtr;
	35	u_int32_t dccph_seq;
	36	} dccph_xtrs;
	37	};
	38
	39	#define DCCPH_CCVAL(dh) (((dh)->dccph_ccval_cscov) & 0x0F)
	40	#define DCCPH_CSCOV(dh) (((dh)->dccph_ccval_cscov >> 4) & 0x0F)
	41
	42	#define DCCPH_X(dh) ((dh)->dccph_xtrs.dccph_xtr & 1)
	43	#define DCCPH_TYPE(dh) (((dh)->dccph_xtrs.dccph_xtr >> 1) & 0xF)
	44	#define DCCPH_SEQ(dh) (((dh)->dccph_xtrs.dccph_seq) >> 8)
	45
	46	/**
	47	* struct dccp_hdr_ext - the low bits of a 48 bit seq packet
	48	*
	49	* @dccph_seq_low - low 24 bits of a 48 bit seq packet
	50	*/
	51	struct dccp_hdr_ext {
	52	u_int32_t dccph_seq_low;
	53	};
	54
	55	/**
	56	* struct dccp_hdr_request - Conection initiation request header
	57	*
	58	* @dccph_req_service - Service to which the client app wants to connect
	59	*/
	60	struct dccp_hdr_request {
	61	u_int32_t dccph_req_service;
	62	};
	63
	64	/**
65	* struct dccp_hdr_ack_bits - acknowledgment bits common to most packets
66	*
67	* @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
68	* @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
69	*/
70	struct dccp_hdr_ack_bits {
71	u_int32_t dccph_ra;
72	u_int32_t dccph_ack_nr_low;
73	};
74
75	#define DCCPH_ACK(dh_ack) ((dh_ack)->dccph_ra >> 8)
76
77	/**
78	* struct dccp_hdr_response - Conection initiation response header
79	*
80	* @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
81	* @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
82	* @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
83	*/
84	struct dccp_hdr_response {
85	struct dccp_hdr_ack_bits dccph_resp_ack;
86	u_int32_t dccph_resp_service;
87	};
88
89	#if 0
90	static inline struct dccp_hdr_data dccp_hdr_data(struct dccp_hdr hdrg)
91	{
92	const int ext = DCCPH_X(hdrg) ? sizeof(struct dccp_hdr_ext) : 0;
93
94	return (struct dccp_hdr_data )(((u_char )hdrg) + sizeof(hdrg) + ext);
95	}
96	#endif
97
98	/**
99	* struct dccp_hdr_reset - Unconditionally shut down a connection
100	*
101	* @dccph_reset_service - Echoes the Service Code on a received DCCP-Request
102	*/
103	struct dccp_hdr_reset {
104	struct dccp_hdr_ack_bits dccph_reset_ack;
105	u_int8_t dccph_reset_code,
106	dccph_reset_data[3];
107	};
108
109	enum dccp_pkt_type {
110	DCCP_PKT_REQUEST = 0,
111	DCCP_PKT_RESPONSE,
112	DCCP_PKT_DATA,
113	DCCP_PKT_ACK,
114	DCCP_PKT_DATAACK,
115	DCCP_PKT_CLOSEREQ,
116	DCCP_PKT_CLOSE,
117	DCCP_PKT_RESET,
118	DCCP_PKT_SYNC,
119	DCCP_PKT_SYNCACK,
120	DCCP_PKT_INVALID
121	};
122
123	enum dccp_reset_codes {
124	DCCP_RESET_CODE_UNSPECIFIED = 0,
125	DCCP_RESET_CODE_CLOSED,
126	DCCP_RESET_CODE_ABORTED,
127	DCCP_RESET_CODE_NO_CONNECTION,
128	DCCP_RESET_CODE_PACKET_ERROR,
129	DCCP_RESET_CODE_OPTION_ERROR,
130	DCCP_RESET_CODE_MANDATORY_ERROR,
131	DCCP_RESET_CODE_CONNECTION_REFUSED,
132	DCCP_RESET_CODE_BAD_SERVICE_CODE,
133	DCCP_RESET_CODE_TOO_BUSY,
134	DCCP_RESET_CODE_BAD_INIT_COOKIE,
135	DCCP_RESET_CODE_AGGRESSION_PENALTY,
136	__DCCP_RESET_CODE_LAST
137	};
138
139	#endif /* __DCCP_HDR__ */