mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Alexey Dobriyan](/assets/img/avatar_default.png)
* remove interrupt.g inclusion from netdevice.h -- not needed * fixup fallout, add interrupt.h and hardirq.h back where needed. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
550 lines
16 KiB
C
550 lines
16 KiB
C
#ifndef _LINUX_DCCP_H
|
|
#define _LINUX_DCCP_H
|
|
|
|
#include <linux/types.h>
|
|
#include <asm/byteorder.h>
|
|
|
|
/**
|
|
* 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 {
|
|
__be16 dccph_sport,
|
|
dccph_dport;
|
|
__u8 dccph_doff;
|
|
#if defined(__LITTLE_ENDIAN_BITFIELD)
|
|
__u8 dccph_cscov:4,
|
|
dccph_ccval:4;
|
|
#elif defined(__BIG_ENDIAN_BITFIELD)
|
|
__u8 dccph_ccval:4,
|
|
dccph_cscov:4;
|
|
#else
|
|
#error "Adjust your <asm/byteorder.h> defines"
|
|
#endif
|
|
__sum16 dccph_checksum;
|
|
#if defined(__LITTLE_ENDIAN_BITFIELD)
|
|
__u8 dccph_x:1,
|
|
dccph_type:4,
|
|
dccph_reserved:3;
|
|
#elif defined(__BIG_ENDIAN_BITFIELD)
|
|
__u8 dccph_reserved:3,
|
|
dccph_type:4,
|
|
dccph_x:1;
|
|
#else
|
|
#error "Adjust your <asm/byteorder.h> defines"
|
|
#endif
|
|
__u8 dccph_seq2;
|
|
__be16 dccph_seq;
|
|
};
|
|
|
|
/**
|
|
* 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 {
|
|
__be32 dccph_seq_low;
|
|
};
|
|
|
|
/**
|
|
* struct dccp_hdr_request - Connection initiation request header
|
|
*
|
|
* @dccph_req_service - Service to which the client app wants to connect
|
|
*/
|
|
struct dccp_hdr_request {
|
|
__be32 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 {
|
|
__be16 dccph_reserved1;
|
|
__be16 dccph_ack_nr_high;
|
|
__be32 dccph_ack_nr_low;
|
|
};
|
|
/**
|
|
* struct dccp_hdr_response - Connection initiation response header
|
|
*
|
|
* @dccph_resp_ack - 48 bit Acknowledgment Number Subheader (5.3)
|
|
* @dccph_resp_service - Echoes the Service Code on a received DCCP-Request
|
|
*/
|
|
struct dccp_hdr_response {
|
|
struct dccp_hdr_ack_bits dccph_resp_ack;
|
|
__be32 dccph_resp_service;
|
|
};
|
|
|
|
/**
|
|
* struct dccp_hdr_reset - Unconditionally shut down a connection
|
|
*
|
|
* @dccph_reset_ack - 48 bit Acknowledgment Number Subheader (5.6)
|
|
* @dccph_reset_code - one of %dccp_reset_codes
|
|
* @dccph_reset_data - the Data 1 ... Data 3 fields from 5.6
|
|
*/
|
|
struct dccp_hdr_reset {
|
|
struct dccp_hdr_ack_bits dccph_reset_ack;
|
|
__u8 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,
|
|
};
|
|
|
|
#define DCCP_NR_PKT_TYPES DCCP_PKT_INVALID
|
|
|
|
static inline unsigned int dccp_packet_hdr_len(const __u8 type)
|
|
{
|
|
if (type == DCCP_PKT_DATA)
|
|
return 0;
|
|
if (type == DCCP_PKT_DATAACK ||
|
|
type == DCCP_PKT_ACK ||
|
|
type == DCCP_PKT_SYNC ||
|
|
type == DCCP_PKT_SYNCACK ||
|
|
type == DCCP_PKT_CLOSE ||
|
|
type == DCCP_PKT_CLOSEREQ)
|
|
return sizeof(struct dccp_hdr_ack_bits);
|
|
if (type == DCCP_PKT_REQUEST)
|
|
return sizeof(struct dccp_hdr_request);
|
|
if (type == DCCP_PKT_RESPONSE)
|
|
return sizeof(struct dccp_hdr_response);
|
|
return sizeof(struct dccp_hdr_reset);
|
|
}
|
|
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_MAX_RESET_CODES /* Leave at the end! */
|
|
};
|
|
|
|
/* DCCP options */
|
|
enum {
|
|
DCCPO_PADDING = 0,
|
|
DCCPO_MANDATORY = 1,
|
|
DCCPO_MIN_RESERVED = 3,
|
|
DCCPO_MAX_RESERVED = 31,
|
|
DCCPO_CHANGE_L = 32,
|
|
DCCPO_CONFIRM_L = 33,
|
|
DCCPO_CHANGE_R = 34,
|
|
DCCPO_CONFIRM_R = 35,
|
|
DCCPO_NDP_COUNT = 37,
|
|
DCCPO_ACK_VECTOR_0 = 38,
|
|
DCCPO_ACK_VECTOR_1 = 39,
|
|
DCCPO_TIMESTAMP = 41,
|
|
DCCPO_TIMESTAMP_ECHO = 42,
|
|
DCCPO_ELAPSED_TIME = 43,
|
|
DCCPO_MAX = 45,
|
|
DCCPO_MIN_RX_CCID_SPECIFIC = 128, /* from sender to receiver */
|
|
DCCPO_MAX_RX_CCID_SPECIFIC = 191,
|
|
DCCPO_MIN_TX_CCID_SPECIFIC = 192, /* from receiver to sender */
|
|
DCCPO_MAX_TX_CCID_SPECIFIC = 255,
|
|
};
|
|
/* maximum size of a single TLV-encoded DCCP option (sans type/len bytes) */
|
|
#define DCCP_SINGLE_OPT_MAXLEN 253
|
|
|
|
/* DCCP CCIDS */
|
|
enum {
|
|
DCCPC_CCID2 = 2,
|
|
DCCPC_CCID3 = 3,
|
|
};
|
|
|
|
/* DCCP features (RFC 4340 section 6.4) */
|
|
enum dccp_feature_numbers {
|
|
DCCPF_RESERVED = 0,
|
|
DCCPF_CCID = 1,
|
|
DCCPF_SHORT_SEQNOS = 2,
|
|
DCCPF_SEQUENCE_WINDOW = 3,
|
|
DCCPF_ECN_INCAPABLE = 4,
|
|
DCCPF_ACK_RATIO = 5,
|
|
DCCPF_SEND_ACK_VECTOR = 6,
|
|
DCCPF_SEND_NDP_COUNT = 7,
|
|
DCCPF_MIN_CSUM_COVER = 8,
|
|
DCCPF_DATA_CHECKSUM = 9,
|
|
/* 10-127 reserved */
|
|
DCCPF_MIN_CCID_SPECIFIC = 128,
|
|
DCCPF_SEND_LEV_RATE = 192, /* RFC 4342, sec. 8.4 */
|
|
DCCPF_MAX_CCID_SPECIFIC = 255,
|
|
};
|
|
|
|
/* DCCP socket control message types for cmsg */
|
|
enum dccp_cmsg_type {
|
|
DCCP_SCM_PRIORITY = 1,
|
|
DCCP_SCM_QPOLICY_MAX = 0xFFFF,
|
|
/* ^-- Up to here reserved exclusively for qpolicy parameters */
|
|
DCCP_SCM_MAX
|
|
};
|
|
|
|
/* DCCP priorities for outgoing/queued packets */
|
|
enum dccp_packet_dequeueing_policy {
|
|
DCCPQ_POLICY_SIMPLE,
|
|
DCCPQ_POLICY_PRIO,
|
|
DCCPQ_POLICY_MAX
|
|
};
|
|
|
|
/* DCCP socket options */
|
|
#define DCCP_SOCKOPT_PACKET_SIZE 1 /* XXX deprecated, without effect */
|
|
#define DCCP_SOCKOPT_SERVICE 2
|
|
#define DCCP_SOCKOPT_CHANGE_L 3
|
|
#define DCCP_SOCKOPT_CHANGE_R 4
|
|
#define DCCP_SOCKOPT_GET_CUR_MPS 5
|
|
#define DCCP_SOCKOPT_SERVER_TIMEWAIT 6
|
|
#define DCCP_SOCKOPT_SEND_CSCOV 10
|
|
#define DCCP_SOCKOPT_RECV_CSCOV 11
|
|
#define DCCP_SOCKOPT_AVAILABLE_CCIDS 12
|
|
#define DCCP_SOCKOPT_CCID 13
|
|
#define DCCP_SOCKOPT_TX_CCID 14
|
|
#define DCCP_SOCKOPT_RX_CCID 15
|
|
#define DCCP_SOCKOPT_QPOLICY_ID 16
|
|
#define DCCP_SOCKOPT_QPOLICY_TXQLEN 17
|
|
#define DCCP_SOCKOPT_CCID_RX_INFO 128
|
|
#define DCCP_SOCKOPT_CCID_TX_INFO 192
|
|
|
|
/* maximum number of services provided on the same listening port */
|
|
#define DCCP_SERVICE_LIST_MAX_LEN 32
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/in.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ktime.h>
|
|
#include <linux/list.h>
|
|
#include <linux/uio.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
#include <net/inet_connection_sock.h>
|
|
#include <net/inet_sock.h>
|
|
#include <net/inet_timewait_sock.h>
|
|
#include <net/tcp_states.h>
|
|
|
|
enum dccp_state {
|
|
DCCP_OPEN = TCP_ESTABLISHED,
|
|
DCCP_REQUESTING = TCP_SYN_SENT,
|
|
DCCP_LISTEN = TCP_LISTEN,
|
|
DCCP_RESPOND = TCP_SYN_RECV,
|
|
/*
|
|
* States involved in closing a DCCP connection:
|
|
* 1) ACTIVE_CLOSEREQ is entered by a server sending a CloseReq.
|
|
*
|
|
* 2) CLOSING can have three different meanings (RFC 4340, 8.3):
|
|
* a. Client has performed active-close, has sent a Close to the server
|
|
* from state OPEN or PARTOPEN, and is waiting for the final Reset
|
|
* (in this case, SOCK_DONE == 1).
|
|
* b. Client is asked to perform passive-close, by receiving a CloseReq
|
|
* in (PART)OPEN state. It sends a Close and waits for final Reset
|
|
* (in this case, SOCK_DONE == 0).
|
|
* c. Server performs an active-close as in (a), keeps TIMEWAIT state.
|
|
*
|
|
* 3) The following intermediate states are employed to give passively
|
|
* closing nodes a chance to process their unread data:
|
|
* - PASSIVE_CLOSE (from OPEN => CLOSED) and
|
|
* - PASSIVE_CLOSEREQ (from (PART)OPEN to CLOSING; case (b) above).
|
|
*/
|
|
DCCP_ACTIVE_CLOSEREQ = TCP_FIN_WAIT1,
|
|
DCCP_PASSIVE_CLOSE = TCP_CLOSE_WAIT, /* any node receiving a Close */
|
|
DCCP_CLOSING = TCP_CLOSING,
|
|
DCCP_TIME_WAIT = TCP_TIME_WAIT,
|
|
DCCP_CLOSED = TCP_CLOSE,
|
|
DCCP_PARTOPEN = TCP_MAX_STATES,
|
|
DCCP_PASSIVE_CLOSEREQ, /* clients receiving CloseReq */
|
|
DCCP_MAX_STATES
|
|
};
|
|
|
|
enum {
|
|
DCCPF_OPEN = TCPF_ESTABLISHED,
|
|
DCCPF_REQUESTING = TCPF_SYN_SENT,
|
|
DCCPF_LISTEN = TCPF_LISTEN,
|
|
DCCPF_RESPOND = TCPF_SYN_RECV,
|
|
DCCPF_ACTIVE_CLOSEREQ = TCPF_FIN_WAIT1,
|
|
DCCPF_CLOSING = TCPF_CLOSING,
|
|
DCCPF_TIME_WAIT = TCPF_TIME_WAIT,
|
|
DCCPF_CLOSED = TCPF_CLOSE,
|
|
DCCPF_PARTOPEN = (1 << DCCP_PARTOPEN),
|
|
};
|
|
|
|
static inline struct dccp_hdr *dccp_hdr(const struct sk_buff *skb)
|
|
{
|
|
return (struct dccp_hdr *)skb_transport_header(skb);
|
|
}
|
|
|
|
static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen)
|
|
{
|
|
skb_push(skb, headlen);
|
|
skb_reset_transport_header(skb);
|
|
return memset(skb_transport_header(skb), 0, headlen);
|
|
}
|
|
|
|
static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh)
|
|
{
|
|
return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh));
|
|
}
|
|
|
|
static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh)
|
|
{
|
|
return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0);
|
|
}
|
|
|
|
static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb)
|
|
{
|
|
const struct dccp_hdr *dh = dccp_hdr(skb);
|
|
return __dccp_basic_hdr_len(dh);
|
|
}
|
|
|
|
static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh)
|
|
{
|
|
__u64 seq_nr = ntohs(dh->dccph_seq);
|
|
|
|
if (dh->dccph_x != 0)
|
|
seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(dh)->dccph_seq_low);
|
|
else
|
|
seq_nr += (u32)dh->dccph_seq2 << 16;
|
|
|
|
return seq_nr;
|
|
}
|
|
|
|
static inline struct dccp_hdr_request *dccp_hdr_request(struct sk_buff *skb)
|
|
{
|
|
return (struct dccp_hdr_request *)(skb_transport_header(skb) +
|
|
dccp_basic_hdr_len(skb));
|
|
}
|
|
|
|
static inline struct dccp_hdr_ack_bits *dccp_hdr_ack_bits(const struct sk_buff *skb)
|
|
{
|
|
return (struct dccp_hdr_ack_bits *)(skb_transport_header(skb) +
|
|
dccp_basic_hdr_len(skb));
|
|
}
|
|
|
|
static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb)
|
|
{
|
|
const struct dccp_hdr_ack_bits *dhack = dccp_hdr_ack_bits(skb);
|
|
return ((u64)ntohs(dhack->dccph_ack_nr_high) << 32) + ntohl(dhack->dccph_ack_nr_low);
|
|
}
|
|
|
|
static inline struct dccp_hdr_response *dccp_hdr_response(struct sk_buff *skb)
|
|
{
|
|
return (struct dccp_hdr_response *)(skb_transport_header(skb) +
|
|
dccp_basic_hdr_len(skb));
|
|
}
|
|
|
|
static inline struct dccp_hdr_reset *dccp_hdr_reset(struct sk_buff *skb)
|
|
{
|
|
return (struct dccp_hdr_reset *)(skb_transport_header(skb) +
|
|
dccp_basic_hdr_len(skb));
|
|
}
|
|
|
|
static inline unsigned int __dccp_hdr_len(const struct dccp_hdr *dh)
|
|
{
|
|
return __dccp_basic_hdr_len(dh) +
|
|
dccp_packet_hdr_len(dh->dccph_type);
|
|
}
|
|
|
|
static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
|
|
{
|
|
return __dccp_hdr_len(dccp_hdr(skb));
|
|
}
|
|
|
|
/**
|
|
* struct dccp_request_sock - represent DCCP-specific connection request
|
|
* @dreq_inet_rsk: structure inherited from
|
|
* @dreq_iss: initial sequence number sent on the Response (RFC 4340, 7.1)
|
|
* @dreq_isr: initial sequence number received on the Request
|
|
* @dreq_service: service code present on the Request (there is just one)
|
|
* @dreq_featneg: feature negotiation options for this connection
|
|
* The following two fields are analogous to the ones in dccp_sock:
|
|
* @dreq_timestamp_echo: last received timestamp to echo (13.1)
|
|
* @dreq_timestamp_echo: the time of receiving the last @dreq_timestamp_echo
|
|
*/
|
|
struct dccp_request_sock {
|
|
struct inet_request_sock dreq_inet_rsk;
|
|
__u64 dreq_iss;
|
|
__u64 dreq_isr;
|
|
__be32 dreq_service;
|
|
struct list_head dreq_featneg;
|
|
__u32 dreq_timestamp_echo;
|
|
__u32 dreq_timestamp_time;
|
|
};
|
|
|
|
static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req)
|
|
{
|
|
return (struct dccp_request_sock *)req;
|
|
}
|
|
|
|
extern struct inet_timewait_death_row dccp_death_row;
|
|
|
|
extern int dccp_parse_options(struct sock *sk, struct dccp_request_sock *dreq,
|
|
struct sk_buff *skb);
|
|
|
|
struct dccp_options_received {
|
|
u64 dccpor_ndp:48;
|
|
u32 dccpor_timestamp;
|
|
u32 dccpor_timestamp_echo;
|
|
u32 dccpor_elapsed_time;
|
|
};
|
|
|
|
struct ccid;
|
|
|
|
enum dccp_role {
|
|
DCCP_ROLE_UNDEFINED,
|
|
DCCP_ROLE_LISTEN,
|
|
DCCP_ROLE_CLIENT,
|
|
DCCP_ROLE_SERVER,
|
|
};
|
|
|
|
struct dccp_service_list {
|
|
__u32 dccpsl_nr;
|
|
__be32 dccpsl_list[0];
|
|
};
|
|
|
|
#define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1)
|
|
#define DCCP_SERVICE_CODE_IS_ABSENT 0
|
|
|
|
static inline int dccp_list_has_service(const struct dccp_service_list *sl,
|
|
const __be32 service)
|
|
{
|
|
if (likely(sl != NULL)) {
|
|
u32 i = sl->dccpsl_nr;
|
|
while (i--)
|
|
if (sl->dccpsl_list[i] == service)
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct dccp_ackvec;
|
|
|
|
/**
|
|
* struct dccp_sock - DCCP socket state
|
|
*
|
|
* @dccps_swl - sequence number window low
|
|
* @dccps_swh - sequence number window high
|
|
* @dccps_awl - acknowledgement number window low
|
|
* @dccps_awh - acknowledgement number window high
|
|
* @dccps_iss - initial sequence number sent
|
|
* @dccps_isr - initial sequence number received
|
|
* @dccps_osr - first OPEN sequence number received
|
|
* @dccps_gss - greatest sequence number sent
|
|
* @dccps_gsr - greatest valid sequence number received
|
|
* @dccps_gar - greatest valid ack number received on a non-Sync; initialized to %dccps_iss
|
|
* @dccps_service - first (passive sock) or unique (active sock) service code
|
|
* @dccps_service_list - second .. last service code on passive socket
|
|
* @dccps_timestamp_echo - latest timestamp received on a TIMESTAMP option
|
|
* @dccps_timestamp_time - time of receiving latest @dccps_timestamp_echo
|
|
* @dccps_l_ack_ratio - feature-local Ack Ratio
|
|
* @dccps_r_ack_ratio - feature-remote Ack Ratio
|
|
* @dccps_l_seq_win - local Sequence Window (influences ack number validity)
|
|
* @dccps_r_seq_win - remote Sequence Window (influences seq number validity)
|
|
* @dccps_pcslen - sender partial checksum coverage (via sockopt)
|
|
* @dccps_pcrlen - receiver partial checksum coverage (via sockopt)
|
|
* @dccps_send_ndp_count - local Send NDP Count feature (7.7.2)
|
|
* @dccps_ndp_count - number of Non Data Packets since last data packet
|
|
* @dccps_mss_cache - current value of MSS (path MTU minus header sizes)
|
|
* @dccps_rate_last - timestamp for rate-limiting DCCP-Sync (RFC 4340, 7.5.4)
|
|
* @dccps_featneg - tracks feature-negotiation state (mostly during handshake)
|
|
* @dccps_hc_rx_ackvec - rx half connection ack vector
|
|
* @dccps_hc_rx_ccid - CCID used for the receiver (or receiving half-connection)
|
|
* @dccps_hc_tx_ccid - CCID used for the sender (or sending half-connection)
|
|
* @dccps_options_received - parsed set of retrieved options
|
|
* @dccps_qpolicy - TX dequeueing policy, one of %dccp_packet_dequeueing_policy
|
|
* @dccps_tx_qlen - maximum length of the TX queue
|
|
* @dccps_role - role of this sock, one of %dccp_role
|
|
* @dccps_hc_rx_insert_options - receiver wants to add options when acking
|
|
* @dccps_hc_tx_insert_options - sender wants to add options when sending
|
|
* @dccps_server_timewait - server holds timewait state on close (RFC 4340, 8.3)
|
|
* @dccps_sync_scheduled - flag which signals "send out-of-band message soon"
|
|
* @dccps_xmitlet - tasklet scheduled by the TX CCID to dequeue data packets
|
|
* @dccps_xmit_timer - used by the TX CCID to delay sending (rate-based pacing)
|
|
* @dccps_syn_rtt - RTT sample from Request/Response exchange (in usecs)
|
|
*/
|
|
struct dccp_sock {
|
|
/* inet_connection_sock has to be the first member of dccp_sock */
|
|
struct inet_connection_sock dccps_inet_connection;
|
|
#define dccps_syn_rtt dccps_inet_connection.icsk_ack.lrcvtime
|
|
__u64 dccps_swl;
|
|
__u64 dccps_swh;
|
|
__u64 dccps_awl;
|
|
__u64 dccps_awh;
|
|
__u64 dccps_iss;
|
|
__u64 dccps_isr;
|
|
__u64 dccps_osr;
|
|
__u64 dccps_gss;
|
|
__u64 dccps_gsr;
|
|
__u64 dccps_gar;
|
|
__be32 dccps_service;
|
|
__u32 dccps_mss_cache;
|
|
struct dccp_service_list *dccps_service_list;
|
|
__u32 dccps_timestamp_echo;
|
|
__u32 dccps_timestamp_time;
|
|
__u16 dccps_l_ack_ratio;
|
|
__u16 dccps_r_ack_ratio;
|
|
__u64 dccps_l_seq_win:48;
|
|
__u64 dccps_r_seq_win:48;
|
|
__u8 dccps_pcslen:4;
|
|
__u8 dccps_pcrlen:4;
|
|
__u8 dccps_send_ndp_count:1;
|
|
__u64 dccps_ndp_count:48;
|
|
unsigned long dccps_rate_last;
|
|
struct list_head dccps_featneg;
|
|
struct dccp_ackvec *dccps_hc_rx_ackvec;
|
|
struct ccid *dccps_hc_rx_ccid;
|
|
struct ccid *dccps_hc_tx_ccid;
|
|
struct dccp_options_received dccps_options_received;
|
|
__u8 dccps_qpolicy;
|
|
__u32 dccps_tx_qlen;
|
|
enum dccp_role dccps_role:2;
|
|
__u8 dccps_hc_rx_insert_options:1;
|
|
__u8 dccps_hc_tx_insert_options:1;
|
|
__u8 dccps_server_timewait:1;
|
|
__u8 dccps_sync_scheduled:1;
|
|
struct tasklet_struct dccps_xmitlet;
|
|
struct timer_list dccps_xmit_timer;
|
|
};
|
|
|
|
static inline struct dccp_sock *dccp_sk(const struct sock *sk)
|
|
{
|
|
return (struct dccp_sock *)sk;
|
|
}
|
|
|
|
static inline const char *dccp_role(const struct sock *sk)
|
|
{
|
|
switch (dccp_sk(sk)->dccps_role) {
|
|
case DCCP_ROLE_UNDEFINED: return "undefined";
|
|
case DCCP_ROLE_LISTEN: return "listen";
|
|
case DCCP_ROLE_SERVER: return "server";
|
|
case DCCP_ROLE_CLIENT: return "client";
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_DCCP_H */
|