Commit 410e27a4 authored by Gerrit Renker's avatar Gerrit Renker

This reverts "Merge branch 'dccp' of git://eden-feed.erg.abdn.ac.uk/dccp_exp"

as it accentally contained the wrong set of patches. These will be
submitted separately.
Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
parent 0a68a20c
......@@ -45,25 +45,6 @@ http://linux-net.osdl.org/index.php/DCCP_Testing#Experimental_DCCP_source_tree
Socket options
==============
DCCP_SOCKOPT_QPOLICY_ID sets the dequeuing policy for outgoing packets. It takes
a policy ID as argument and can only be set before the connection (i.e. changes
during an established connection are not supported). Currently, two policies are
defined: the "simple" policy (DCCPQ_POLICY_SIMPLE), which does nothing special,
and a priority-based variant (DCCPQ_POLICY_PRIO). The latter allows to pass an
u32 priority value as ancillary data to sendmsg(), where higher numbers indicate
a higher packet priority (similar to SO_PRIORITY). This ancillary data needs to
be formatted using a cmsg(3) message header filled in as follows:
cmsg->cmsg_level = SOL_DCCP;
cmsg->cmsg_type = DCCP_SCM_PRIORITY;
cmsg->cmsg_len = CMSG_LEN(sizeof(uint32_t)); /* or CMSG_LEN(4) */
DCCP_SOCKOPT_QPOLICY_TXQLEN sets the maximum length of the output queue. A zero
value is always interpreted as unbounded queue length. If different from zero,
the interpretation of this parameter depends on the current dequeuing policy
(see above): the "simple" policy will enforce a fixed queue size by returning
EAGAIN, whereas the "prio" policy enforces a fixed queue length by dropping the
lowest-priority packet first. The default value for this parameter is
initialised from /proc/sys/net/dccp/default/tx_qlen.
DCCP_SOCKOPT_SERVICE sets the service. The specification mandates use of
service codes (RFC 4340, sec. 8.1.2); if this socket option is not set,
......@@ -76,24 +57,6 @@ can be set before calling bind().
DCCP_SOCKOPT_GET_CUR_MPS is read-only and retrieves the current maximum packet
size (application payload size) in bytes, see RFC 4340, section 14.
DCCP_SOCKOPT_AVAILABLE_CCIDS is also read-only and returns the list of CCIDs
supported by the endpoint (see include/linux/dccp.h for symbolic constants).
The caller needs to provide a sufficiently large (> 2) array of type uint8_t.
DCCP_SOCKOPT_CCID is write-only and sets both the TX and RX CCIDs at the same
time, combining the operation of the next two socket options. This option is
preferrable over the latter two, since often applications will use the same
type of CCID for both directions; and mixed use of CCIDs is not currently well
understood. This socket option takes as argument at least one uint8_t value, or
an array of uint8_t values, which must match available CCIDS (see above). CCIDs
must be registered on the socket before calling connect() or listen().
DCCP_SOCKOPT_TX_CCID is read/write. It returns the current CCID (if set) or sets
the preference list for the TX CCID, using the same format as DCCP_SOCKOPT_CCID.
Please note that the getsockopt argument type here is `int', not uint8_t.
DCCP_SOCKOPT_RX_CCID is analogous to DCCP_SOCKOPT_TX_CCID, but for the RX CCID.
DCCP_SOCKOPT_SERVER_TIMEWAIT enables the server (listening socket) to hold
timewait state when closing the connection (RFC 4340, 8.3). The usual case is
that the closing server sends a CloseReq, whereupon the client holds timewait
......@@ -152,16 +115,23 @@ retries2
importance for retransmitted acknowledgments and feature negotiation,
data packets are never retransmitted. Analogue of tcp_retries2.
send_ndp = 1
Whether or not to send NDP count options (sec. 7.7.2).
send_ackvec = 1
Whether or not to send Ack Vector options (sec. 11.5).
ack_ratio = 2
The default Ack Ratio (sec. 11.3) to use.
tx_ccid = 2
Default CCID for the sender-receiver half-connection. Depending on the
choice of CCID, the Send Ack Vector feature is enabled automatically.
Default CCID for the sender-receiver half-connection.
rx_ccid = 2
Default CCID for the receiver-sender half-connection; see tx_ccid.
Default CCID for the receiver-sender half-connection.
seq_window = 100
The initial sequence window (sec. 7.5.2) of the sender. This influences
the local ackno validity and the remote seqno validity windows (7.5.1).
The initial sequence window (sec. 7.5.2).
tx_qlen = 5
The size of the transmit buffer in packets. A value of 0 corresponds
......
......@@ -165,13 +165,9 @@ enum {
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,
DCCPO_MIN_CCID_SPECIFIC = 128,
DCCPO_MAX_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 {
......@@ -180,36 +176,27 @@ enum {
};
/* DCCP features (RFC 4340 section 6.4) */
enum dccp_feature_numbers {
enum {
DCCPF_RESERVED = 0,
DCCPF_CCID = 1,
DCCPF_SHORT_SEQNOS = 2,
DCCPF_SHORT_SEQNOS = 2, /* XXX: not yet implemented */
DCCPF_SEQUENCE_WINDOW = 3,
DCCPF_ECN_INCAPABLE = 4,
DCCPF_ECN_INCAPABLE = 4, /* XXX: not yet implemented */
DCCPF_ACK_RATIO = 5,
DCCPF_SEND_ACK_VECTOR = 6,
DCCPF_SEND_NDP_COUNT = 7,
DCCPF_MIN_CSUM_COVER = 8,
DCCPF_DATA_CHECKSUM = 9,
DCCPF_DATA_CHECKSUM = 9, /* XXX: not yet implemented */
/* 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
/* this structure is argument to DCCP_SOCKOPT_CHANGE_X */
struct dccp_so_feat {
__u8 dccpsf_feat;
__u8 __user *dccpsf_val;
__u8 dccpsf_len;
};
/* DCCP socket options */
......@@ -221,12 +208,6 @@ enum dccp_packet_dequeueing_policy {
#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
......@@ -374,13 +355,62 @@ static inline unsigned int dccp_hdr_len(const struct sk_buff *skb)
return __dccp_hdr_len(dccp_hdr(skb));
}
/* initial values for each feature */
#define DCCPF_INITIAL_SEQUENCE_WINDOW 100
#define DCCPF_INITIAL_ACK_RATIO 2
#define DCCPF_INITIAL_CCID DCCPC_CCID2
#define DCCPF_INITIAL_SEND_ACK_VECTOR 1
/* FIXME: for now we're default to 1 but it should really be 0 */
#define DCCPF_INITIAL_SEND_NDP_COUNT 1
/**
* struct dccp_minisock - Minimal DCCP connection representation
*
* Will be used to pass the state from dccp_request_sock to dccp_sock.
*
* @dccpms_sequence_window - Sequence Window Feature (section 7.5.2)
* @dccpms_ccid - Congestion Control Id (CCID) (section 10)
* @dccpms_send_ack_vector - Send Ack Vector Feature (section 11.5)
* @dccpms_send_ndp_count - Send NDP Count Feature (7.7.2)
* @dccpms_ack_ratio - Ack Ratio Feature (section 11.3)
* @dccpms_pending - List of features being negotiated
* @dccpms_conf -
*/
struct dccp_minisock {
__u64 dccpms_sequence_window;
__u8 dccpms_rx_ccid;
__u8 dccpms_tx_ccid;
__u8 dccpms_send_ack_vector;
__u8 dccpms_send_ndp_count;
__u8 dccpms_ack_ratio;
struct list_head dccpms_pending;
struct list_head dccpms_conf;
};
struct dccp_opt_conf {
__u8 *dccpoc_val;
__u8 dccpoc_len;
};
struct dccp_opt_pend {
struct list_head dccpop_node;
__u8 dccpop_type;
__u8 dccpop_feat;
__u8 *dccpop_val;
__u8 dccpop_len;
int dccpop_conf;
struct dccp_opt_conf *dccpop_sc;
};
extern void dccp_minisock_init(struct dccp_minisock *dmsk);
/**
* 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
......@@ -390,7 +420,6 @@ struct dccp_request_sock {
__u64 dreq_iss;
__u64 dreq_isr;
__be32 dreq_service;
struct list_head dreq_featneg;
__u32 dreq_timestamp_echo;
__u32 dreq_timestamp_time;
};
......@@ -462,28 +491,21 @@ struct dccp_ackvec;
* @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_minisock - associated minisock (accessed via dccp_msk)
* @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_xmit_timer - timer for when CCID is not ready to send
* @dccps_syn_rtt - RTT sample from Request/Response exchange (in usecs)
*/
struct dccp_sock {
......@@ -507,26 +529,19 @@ struct dccp_sock {
__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;
__u16 dccps_pcslen;
__u16 dccps_pcrlen;
__u64 dccps_ndp_count:48;
unsigned long dccps_rate_last;
struct list_head dccps_featneg;
struct dccp_minisock dccps_minisock;
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;
};
......@@ -535,6 +550,11 @@ static inline struct dccp_sock *dccp_sk(const struct sock *sk)
return (struct dccp_sock *)sk;
}
static inline struct dccp_minisock *dccp_msk(const struct sock *sk)
{
return (struct dccp_minisock *)&dccp_sk(sk)->dccps_minisock;
}
static inline const char *dccp_role(const struct sock *sk)
{
switch (dccp_sk(sk)->dccps_role) {
......
......@@ -782,21 +782,6 @@ static inline __u32 tcp_current_ssthresh(const struct sock *sk)
/* Use define here intentionally to get WARN_ON location shown at the caller */
#define tcp_verify_left_out(tp) WARN_ON(tcp_left_out(tp) > tp->packets_out)
/*
* Convert RFC3390 larger initial windows into an equivalent number of packets.
*
* John Heffner states:
*
* The RFC specifies a window of no more than 4380 bytes
* unless 2*MSS > 4380. Reading the pseudocode in the RFC
* is a bit misleading because they use a clamp at 4380 bytes
* rather than a multiplier in the relevant range.
*/
static inline u32 rfc3390_bytes_to_packets(const u32 bytes)
{
return bytes <= 1095 ? 4 : (bytes > 1460 ? 2 : 3);
}
extern void tcp_enter_cwr(struct sock *sk, const int set_ssthresh);
extern __u32 tcp_init_cwnd(struct tcp_sock *tp, struct dst_entry *dst);
......
......@@ -25,6 +25,9 @@ config INET_DCCP_DIAG
def_tristate y if (IP_DCCP = y && INET_DIAG = y)
def_tristate m
config IP_DCCP_ACKVEC
bool
source "net/dccp/ccids/Kconfig"
menu "DCCP Kernel Hacking"
......
obj-$(CONFIG_IP_DCCP) += dccp.o dccp_ipv4.o
dccp-y := ccid.o feat.o input.o minisocks.o options.o \
qpolicy.o output.o proto.o timer.o ackvec.o
dccp-y := ccid.o feat.o input.o minisocks.o options.o output.o proto.o timer.o
dccp_ipv4-y := ipv4.o
......@@ -9,6 +8,8 @@ dccp_ipv4-y := ipv4.o
obj-$(subst y,$(CONFIG_IP_DCCP),$(CONFIG_IPV6)) += dccp_ipv6.o
dccp_ipv6-y := ipv6.o
dccp-$(CONFIG_IP_DCCP_ACKVEC) += ackvec.o
obj-$(CONFIG_INET_DCCP_DIAG) += dccp_diag.o
obj-$(CONFIG_NET_DCCPPROBE) += dccp_probe.o
......
This diff is collapsed.
......@@ -3,134 +3,156 @@
/*
* net/dccp/ackvec.h
*
* An implementation of Ack Vectors for the DCCP protocol
* Copyright (c) 2007 University of Aberdeen, Scotland, UK
* An implementation of the DCCP protocol
* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@mandriva.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/dccp.h>
#include <linux/compiler.h>
#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/types.h>
/*
* Ack Vector buffer space is static, in multiples of %DCCP_SINGLE_OPT_MAXLEN,
* the maximum size of a single Ack Vector. Setting %DCCPAV_NUM_ACKVECS to 1
* will be sufficient for most cases of low Ack Ratios, using a value of 2 gives
* more headroom if Ack Ratio is higher or when the sender acknowledges slowly.
* The maximum value is bounded by the u16 types for indices and functions.
*/
#define DCCPAV_NUM_ACKVECS 2
#define DCCPAV_MAX_ACKVEC_LEN (DCCP_SINGLE_OPT_MAXLEN * DCCPAV_NUM_ACKVECS)
/* Estimated minimum average Ack Vector length - used for updating MPS */
#define DCCPAV_MIN_OPTLEN 16
/* Threshold for coping with large bursts of losses */
#define DCCPAV_BURST_THRESH (DCCPAV_MAX_ACKVEC_LEN / 8)
enum dccp_ackvec_states {
DCCPAV_RECEIVED = 0x00,
DCCPAV_ECN_MARKED = 0x40,
DCCPAV_RESERVED = 0x80,
DCCPAV_NOT_RECEIVED = 0xC0
};
#define DCCPAV_MAX_RUNLEN 0x3F
/* Read about the ECN nonce to see why it is 253 */
#define DCCP_MAX_ACKVEC_OPT_LEN 253
/* We can spread an ack vector across multiple options */
#define DCCP_MAX_ACKVEC_LEN (DCCP_MAX_ACKVEC_OPT_LEN * 2)
static inline u8 dccp_ackvec_runlen(const u8 *cell)
{
return *cell & DCCPAV_MAX_RUNLEN;
}
#define DCCP_ACKVEC_STATE_RECEIVED 0
#define DCCP_ACKVEC_STATE_ECN_MARKED (1 << 6)
#define DCCP_ACKVEC_STATE_NOT_RECEIVED (3 << 6)
static inline u8 dccp_ackvec_state(const u8 *cell)
{
return *cell & ~DCCPAV_MAX_RUNLEN;
}
#define DCCP_ACKVEC_STATE_MASK 0xC0 /* 11000000 */
#define DCCP_ACKVEC_LEN_MASK 0x3F /* 00111111 */
/** struct dccp_ackvec - Ack Vector main data structure
/** struct dccp_ackvec - ack vector
*
* This data structure is the one defined in RFC 4340, Appendix A.
*
* This implements a fixed-size circular buffer within an array and is largely
* based on Appendix A of RFC 4340.
* @av_buf_head - circular buffer head
* @av_buf_tail - circular buffer tail
* @av_buf_ackno - ack # of the most recent packet acknowledgeable in the
* buffer (i.e. %av_buf_head)
* @av_buf_nonce - the one-bit sum of the ECN Nonces on all packets acked
* by the buffer with State 0
*
* @av_buf: circular buffer storage area
* @av_buf_head: head index; begin of live portion in @av_buf
* @av_buf_tail: tail index; first index _after_ the live portion in @av_buf
* @av_buf_ackno: highest seqno of acknowledgeable packet recorded in @av_buf
* @av_tail_ackno: lowest seqno of acknowledgeable packet recorded in @av_buf
* @av_buf_nonce: ECN nonce sums, each covering subsequent segments of up to
* %DCCP_SINGLE_OPT_MAXLEN cells in the live portion of @av_buf
* @av_overflow: if 1 then buf_head == buf_tail indicates buffer wraparound
* @av_records: list of %dccp_ackvec_record (Ack Vectors sent previously)
* Additionally, the HC-Receiver must keep some information about the
* Ack Vectors it has recently sent. For each packet sent carrying an
* Ack Vector, it remembers four variables:
*
* @av_records - list of dccp_ackvec_record
* @av_ack_nonce - the one-bit sum of the ECN Nonces for all State 0.
*
* @av_time - the time in usecs
* @av_buf - circular buffer of acknowledgeable packets
*/
struct dccp_ackvec {
u8 av_buf[DCCPAV_MAX_ACKVEC_LEN];
u16 av_buf_head;
u16 av_buf_tail;
u64 av_buf_ackno:48;
u64 av_tail_ackno:48;
bool av_buf_nonce[DCCPAV_NUM_ACKVECS];
u8 av_overflow:1;
u64 av_buf_ackno;
struct list_head av_records;
ktime_t av_time;
u16 av_buf_head;
u16 av_vec_len;
u8 av_buf_nonce;
u8 av_ack_nonce;
u8 av_buf[DCCP_MAX_ACKVEC_LEN];
};
/** struct dccp_ackvec_record - Records information about sent Ack Vectors
/** struct dccp_ackvec_record - ack vector record
*
* These list entries define the additional information which the HC-Receiver
* keeps about recently-sent Ack Vectors; again refer to RFC 4340, Appendix A.
* ACK vector record as defined in Appendix A of spec.
*
* @avr_node: the list node in @av_records
* @avr_ack_seqno: sequence number of the packet the Ack Vector was sent on
* @avr_ack_ackno: the Ack number that this record/Ack Vector refers to
* @avr_ack_ptr: pointer into @av_buf where this record starts
* @avr_ack_runlen: run length of @avr_ack_ptr at the time of sending
* @avr_ack_nonce: the sum of @av_buf_nonce's at the time this record was sent
* The list is sorted by avr_ack_seqno
*
* The list as a whole is sorted in descending order by @avr_ack_seqno.
* @avr_node - node in av_records
* @avr_ack_seqno - sequence number of the packet this record was sent on
* @avr_ack_ackno - sequence number being acknowledged
* @avr_ack_ptr - pointer into av_buf where this record starts
* @avr_ack_nonce - av_ack_nonce at the time this record was sent
* @avr_sent_len - lenght of the record in av_buf
*/
struct dccp_ackvec_record {
struct list_head avr_node;
u64 avr_ack_seqno:48;
u64 avr_ack_ackno:48;
u64 avr_ack_seqno;
u64 avr_ack_ackno;
u16 avr_ack_ptr;
u8 avr_ack_runlen;
u8 avr_ack_nonce:1;
u16 avr_sent_len;
u8 avr_ack_nonce;
};
extern int dccp_ackvec_init(void);
struct sock;
struct sk_buff;
#ifdef CONFIG_IP_DCCP_ACKVEC
extern int dccp_ackvec_init(void);
extern void dccp_ackvec_exit(void);
extern struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority);
extern void dccp_ackvec_free(struct dccp_ackvec *av);
extern void dccp_ackvec_input(struct dccp_ackvec *av, struct sk_buff *skb);
extern int dccp_ackvec_update_records(struct dccp_ackvec *av, u64 seq, u8 sum);
extern void dccp_ackvec_clear_state(struct dccp_ackvec *av, const u64 ackno);
extern u16 dccp_ackvec_buflen(const struct dccp_ackvec *av);
extern int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
const u64 ackno, const u8 state);
extern void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
struct sock *sk, const u64 ackno);
extern int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
u64 *ackno, const u8 opt,
const u8 *value, const u8 len);
static inline bool dccp_ackvec_is_empty(const struct dccp_ackvec *av)
extern int dccp_insert_option_ackvec(struct sock *sk, struct sk_buff *skb);
static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
{
return av->av_vec_len;
}
#else /* CONFIG_IP_DCCP_ACKVEC */
static inline int dccp_ackvec_init(void)
{
return av->av_overflow == 0 && av->av_buf_head == av->av_buf_tail;
return 0;
}
/**
* struct dccp_ackvec_parsed - Record offsets of Ack Vectors in skb
* @vec: start of vector (offset into skb)
* @len: length of @vec
* @nonce: whether @vec had an ECN nonce of 0 or 1
* @node: FIFO - arranged in descending order of ack_ackno
* This structure is used by CCIDs to access Ack Vectors in a received skb.
*/
struct dccp_ackvec_parsed {
u8 *vec,
len,
nonce:1;
struct list_head node;
};
static inline void dccp_ackvec_exit(void)
{
}
static inline struct dccp_ackvec *dccp_ackvec_alloc(const gfp_t priority)
{
return NULL;
}
static inline void dccp_ackvec_free(struct dccp_ackvec *av)
{
}
static inline int dccp_ackvec_add(struct dccp_ackvec *av, const struct sock *sk,
const u64 ackno, const u8 state)
{
return -1;
}
extern int dccp_ackvec_parsed_add(struct list_head *head,
u8 *vec, u8 len, u8 nonce);
extern void dccp_ackvec_parsed_cleanup(struct list_head *parsed_chunks);
static inline void dccp_ackvec_check_rcv_ackno(struct dccp_ackvec *av,
struct sock *sk, const u64 ackno)
{
}
static inline int dccp_ackvec_parse(struct sock *sk, const struct sk_buff *skb,
const u64 *ackno, const u8 opt,
const u8 *value, const u8 len)
{
return -1;
}
static inline int dccp_insert_option_ackvec(const struct sock *sk,
const struct sk_buff *skb)
{
return -1;
}
static inline int dccp_ackvec_pending(const struct dccp_ackvec *av)
{
return 0;
}
#endif /* CONFIG_IP_DCCP_ACKVEC */
#endif /* _ACKVEC_H */
......@@ -13,13 +13,6 @@
#include "ccid.h"
static u8 builtin_ccids[] = {
DCCPC_CCID2, /* CCID2 is supported by default */
#if defined(CONFIG_IP_DCCP_CCID3) || defined(CONFIG_IP_DCCP_CCID3_MODULE)
DCCPC_CCID3,
#endif
};
static struct ccid_operations *ccids[CCID_MAX];
#if defined(CONFIG_SMP) || defined(CONFIG_PREEMPT)
static atomic_t ccids_lockct = ATOMIC_INIT(0);
......@@ -93,47 +86,6 @@ static void ccid_kmem_cache_destroy(struct kmem_cache *slab)
}
}
/* check that up to @array_len members in @ccid_array are supported */
bool ccid_support_check(u8 const *ccid_array, u8 array_len)
{
u8 i, j, found;
for (i = 0, found = 0; i < array_len; i++, found = 0) {
for (j = 0; !found && j < ARRAY_SIZE(builtin_ccids); j++)
found = (ccid_array[i] == builtin_ccids[j]);
if (!found)
return false;
}
return true;