diff options
Diffstat (limited to 'freebsd/contrib/tcpdump/dccp.h')
| -rw-r--r-- | freebsd/contrib/tcpdump/dccp.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/freebsd/contrib/tcpdump/dccp.h b/freebsd/contrib/tcpdump/dccp.h new file mode 100644 index 00000000..5c66e23c --- /dev/null +++ b/freebsd/contrib/tcpdump/dccp.h @@ -0,0 +1,139 @@ +/* @(#) $Header: /tcpdump/master/tcpdump/dccp.h,v 1.5 2006-11-02 09:05:23 hannes 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 >> 4) & 0xF) +#define DCCPH_CSCOV(dh) (((dh)->dccph_ccval_cscov) & 0xF) + +#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__ */ |