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[/] [hf-risc/] [trunk/] [tools/] [riscv-gnu-toolchain-master/] [linux-headers/] [include/] [linux/] [dccp.h] - Blame information for rev 13

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1 13 serginhofr 
#ifndef _LINUX_DCCP_H
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#define _LINUX_DCCP_H
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#include <linux/types.h>
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#include <asm/byteorder.h>
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/**
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 * struct dccp_hdr - generic part of DCCP packet header
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 *
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 * @dccph_sport - Relevant port on the endpoint that sent this packet
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 * @dccph_dport - Relevant port on the other endpoint
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 * @dccph_doff - Data Offset from the start of the DCCP header, in 32-bit words
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 * @dccph_ccval - Used by the HC-Sender CCID
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 * @dccph_cscov - Parts of the packet that are covered by the Checksum field
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 * @dccph_checksum - Internet checksum, depends on dccph_cscov
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 * @dccph_x - 0 = 24 bit sequence number, 1 = 48
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 * @dccph_type - packet type, see DCCP_PKT_ prefixed macros
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 * @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x
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 */
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struct dccp_hdr {
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        __be16  dccph_sport,
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                dccph_dport;
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        __u8    dccph_doff;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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        __u8    dccph_cscov:4,
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                dccph_ccval:4;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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        __u8    dccph_ccval:4,
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                dccph_cscov:4;
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#else
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#error  "Adjust your <asm/byteorder.h> defines"
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#endif
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        __sum16 dccph_checksum;
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#if defined(__LITTLE_ENDIAN_BITFIELD)
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        __u8    dccph_x:1,
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                dccph_type:4,
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                dccph_reserved:3;
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#elif defined(__BIG_ENDIAN_BITFIELD)
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        __u8    dccph_reserved:3,
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                dccph_type:4,
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                dccph_x:1;
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#else
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#error  "Adjust your <asm/byteorder.h> defines"
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#endif
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        __u8    dccph_seq2;
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        __be16  dccph_seq;
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};
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/**
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 * struct dccp_hdr_ext - the low bits of a 48 bit seq packet
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 *
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 * @dccph_seq_low - low 24 bits of a 48 bit seq packet
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 */
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struct dccp_hdr_ext {
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        __be32  dccph_seq_low;
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};
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/**
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 * struct dccp_hdr_request - Connection initiation request header
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 *
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 * @dccph_req_service - Service to which the client app wants to connect
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 */
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struct dccp_hdr_request {
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        __be32  dccph_req_service;
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};
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/**
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 * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets
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 *
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 * @dccph_resp_ack_nr_high - 48 bit ack number high order bits, contains GSR
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 * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR
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 */
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struct dccp_hdr_ack_bits {
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        __be16  dccph_reserved1;
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        __be16  dccph_ack_nr_high;
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        __be32  dccph_ack_nr_low;
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};
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/**
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 * struct dccp_hdr_response - Connection initiation response header
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 *
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 * @dccph_resp_ack - 48 bit Acknowledgment Number Subheader (5.3)
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 * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
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 */
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struct dccp_hdr_response {
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        struct dccp_hdr_ack_bits        dccph_resp_ack;
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        __be32                          dccph_resp_service;
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};
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/**
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 * struct dccp_hdr_reset - Unconditionally shut down a connection
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 *
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 * @dccph_reset_ack - 48 bit Acknowledgment Number Subheader (5.6)
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 * @dccph_reset_code - one of %dccp_reset_codes
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 * @dccph_reset_data - the Data 1 ... Data 3 fields from 5.6
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 */
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struct dccp_hdr_reset {
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        struct dccp_hdr_ack_bits        dccph_reset_ack;
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        __u8                            dccph_reset_code,
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                                        dccph_reset_data[3];
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};
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enum dccp_pkt_type {
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        DCCP_PKT_REQUEST = 0,
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        DCCP_PKT_RESPONSE,
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        DCCP_PKT_DATA,
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        DCCP_PKT_ACK,
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        DCCP_PKT_DATAACK,
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        DCCP_PKT_CLOSEREQ,
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        DCCP_PKT_CLOSE,
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        DCCP_PKT_RESET,
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        DCCP_PKT_SYNC,
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        DCCP_PKT_SYNCACK,
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        DCCP_PKT_INVALID,
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};
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#define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID
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static __inline__ unsigned int dccp_packet_hdr_len(const __u8 type)
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{
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        if (type == DCCP_PKT_DATA)
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                return 0;
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        if (type == DCCP_PKT_DATAACK    ||
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            type == DCCP_PKT_ACK        ||
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            type == DCCP_PKT_SYNC       ||
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            type == DCCP_PKT_SYNCACK    ||
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            type == DCCP_PKT_CLOSE      ||
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            type == DCCP_PKT_CLOSEREQ)
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                return sizeof(struct dccp_hdr_ack_bits);
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        if (type == DCCP_PKT_REQUEST)
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                return sizeof(struct dccp_hdr_request);
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        if (type == DCCP_PKT_RESPONSE)
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                return sizeof(struct dccp_hdr_response);
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        return sizeof(struct dccp_hdr_reset);
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}
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enum dccp_reset_codes {
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        DCCP_RESET_CODE_UNSPECIFIED = 0,
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        DCCP_RESET_CODE_CLOSED,
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        DCCP_RESET_CODE_ABORTED,
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        DCCP_RESET_CODE_NO_CONNECTION,
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        DCCP_RESET_CODE_PACKET_ERROR,
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        DCCP_RESET_CODE_OPTION_ERROR,
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        DCCP_RESET_CODE_MANDATORY_ERROR,
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        DCCP_RESET_CODE_CONNECTION_REFUSED,
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        DCCP_RESET_CODE_BAD_SERVICE_CODE,
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        DCCP_RESET_CODE_TOO_BUSY,
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        DCCP_RESET_CODE_BAD_INIT_COOKIE,
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        DCCP_RESET_CODE_AGGRESSION_PENALTY,
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        DCCP_MAX_RESET_CODES            /* Leave at the end!  */
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};
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/* DCCP options */
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enum {
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        DCCPO_PADDING = 0,
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        DCCPO_MANDATORY = 1,
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        DCCPO_MIN_RESERVED = 3,
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        DCCPO_MAX_RESERVED = 31,
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        DCCPO_CHANGE_L = 32,
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        DCCPO_CONFIRM_L = 33,
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        DCCPO_CHANGE_R = 34,
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        DCCPO_CONFIRM_R = 35,
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        DCCPO_NDP_COUNT = 37,
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        DCCPO_ACK_VECTOR_0 = 38,
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        DCCPO_ACK_VECTOR_1 = 39,
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        DCCPO_TIMESTAMP = 41,
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        DCCPO_TIMESTAMP_ECHO = 42,
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        DCCPO_ELAPSED_TIME = 43,
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        DCCPO_MAX = 45,
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        DCCPO_MIN_RX_CCID_SPECIFIC = 128,       /* from sender to receiver */
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        DCCPO_MAX_RX_CCID_SPECIFIC = 191,
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        DCCPO_MIN_TX_CCID_SPECIFIC = 192,       /* from receiver to sender */
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        DCCPO_MAX_TX_CCID_SPECIFIC = 255,
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};
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/* maximum size of a single TLV-encoded DCCP option (sans type/len bytes) */
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#define DCCP_SINGLE_OPT_MAXLEN  253
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/* DCCP CCIDS */
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enum {
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        DCCPC_CCID2 = 2,
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        DCCPC_CCID3 = 3,
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};
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/* DCCP features (RFC 4340 section 6.4) */
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enum dccp_feature_numbers {
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        DCCPF_RESERVED = 0,
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        DCCPF_CCID = 1,
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        DCCPF_SHORT_SEQNOS = 2,
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        DCCPF_SEQUENCE_WINDOW = 3,
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        DCCPF_ECN_INCAPABLE = 4,
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        DCCPF_ACK_RATIO = 5,
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        DCCPF_SEND_ACK_VECTOR = 6,
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        DCCPF_SEND_NDP_COUNT = 7,
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        DCCPF_MIN_CSUM_COVER = 8,
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        DCCPF_DATA_CHECKSUM = 9,
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        /* 10-127 reserved */
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        DCCPF_MIN_CCID_SPECIFIC = 128,
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        DCCPF_SEND_LEV_RATE = 192,      /* RFC 4342, sec. 8.4 */
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        DCCPF_MAX_CCID_SPECIFIC = 255,
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};
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/* DCCP socket control message types for cmsg */
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enum dccp_cmsg_type {
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        DCCP_SCM_PRIORITY = 1,
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        DCCP_SCM_QPOLICY_MAX = 0xFFFF,
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        /* ^-- Up to here reserved exclusively for qpolicy parameters */
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        DCCP_SCM_MAX
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};
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/* DCCP priorities for outgoing/queued packets */
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enum dccp_packet_dequeueing_policy {
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        DCCPQ_POLICY_SIMPLE,
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        DCCPQ_POLICY_PRIO,
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        DCCPQ_POLICY_MAX
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};
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/* DCCP socket options */
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#define DCCP_SOCKOPT_PACKET_SIZE        1 /* XXX deprecated, without effect */
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#define DCCP_SOCKOPT_SERVICE            2
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#define DCCP_SOCKOPT_CHANGE_L           3
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#define DCCP_SOCKOPT_CHANGE_R           4
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#define DCCP_SOCKOPT_GET_CUR_MPS        5
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#define DCCP_SOCKOPT_SERVER_TIMEWAIT    6
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#define DCCP_SOCKOPT_SEND_CSCOV         10
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#define DCCP_SOCKOPT_RECV_CSCOV         11
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#define DCCP_SOCKOPT_AVAILABLE_CCIDS    12
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#define DCCP_SOCKOPT_CCID               13
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#define DCCP_SOCKOPT_TX_CCID            14
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#define DCCP_SOCKOPT_RX_CCID            15
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#define DCCP_SOCKOPT_QPOLICY_ID         16
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#define DCCP_SOCKOPT_QPOLICY_TXQLEN     17
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#define DCCP_SOCKOPT_CCID_RX_INFO       128
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#define DCCP_SOCKOPT_CCID_TX_INFO       192
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/* maximum number of services provided on the same listening port */
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#define DCCP_SERVICE_LIST_MAX_LEN      32
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#endif /* _LINUX_DCCP_H */

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