X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fdccp.h;h=61734e27abb7b6fc5e0c54d018c8969381a23c86;hb=22a9d645677feefd402befd02edd59b122289ef1;hp=add4908b8e577b78c8bc6151eefad7092992f9ce;hpb=5a47a470e602eecb168ddd3b78841b84ceddd319;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/dccp.h b/include/linux/dccp.h index add4908..61734e2 100644 --- a/include/linux/dccp.h +++ b/include/linux/dccp.h @@ -4,12 +4,6 @@ #include #include -/* FIXME: this is utterly wrong */ -struct sockaddr_dccp { - struct sockaddr_in in; - unsigned int service; -}; - /** * struct dccp_hdr - generic part of DCCP packet header * @@ -24,7 +18,7 @@ struct sockaddr_dccp { * @dccph_seq - sequence number high or low order 24 bits, depends on dccph_x */ struct dccp_hdr { - __u16 dccph_sport, + __be16 dccph_sport, dccph_dport; __u8 dccph_doff; #if defined(__LITTLE_ENDIAN_BITFIELD) @@ -36,20 +30,20 @@ struct dccp_hdr { #else #error "Adjust your defines" #endif - __u16 dccph_checksum; + __sum16 dccph_checksum; #if defined(__LITTLE_ENDIAN_BITFIELD) - __u32 dccph_x:1, + __u8 dccph_x:1, dccph_type:4, - dccph_reserved:3, - dccph_seq:24; + dccph_reserved:3; #elif defined(__BIG_ENDIAN_BITFIELD) - __u32 dccph_reserved:3, + __u8 dccph_reserved:3, dccph_type:4, - dccph_x:1, - dccph_seq:24; + dccph_x:1; #else #error "Adjust your defines" #endif + __u8 dccph_seq2; + __be16 dccph_seq; }; /** @@ -58,17 +52,16 @@ struct dccp_hdr { * @dccph_seq_low - low 24 bits of a 48 bit seq packet */ struct dccp_hdr_ext { - __u32 dccph_seq_low; + __be32 dccph_seq_low; }; /** - * struct dccp_hdr_request - Conection initiation request header + * struct dccp_hdr_request - Connection initiation request header * * @dccph_req_service - Service to which the client app wants to connect - * @dccph_req_options - list of options (must be a multiple of 32 bits */ struct dccp_hdr_request { - __u32 dccph_req_service; + __be32 dccph_req_service; }; /** * struct dccp_hdr_ack_bits - acknowledgment bits common to most packets @@ -77,28 +70,27 @@ struct dccp_hdr_request { * @dccph_resp_ack_nr_low - 48 bit ack number low order bits, contains GSR */ struct dccp_hdr_ack_bits { - __u32 dccph_reserved1:8, - dccph_ack_nr_high:24; - __u32 dccph_ack_nr_low; + __be16 dccph_reserved1; + __be16 dccph_ack_nr_high; + __be32 dccph_ack_nr_low; }; /** - * struct dccp_hdr_response - Conection initiation response header + * struct dccp_hdr_response - Connection 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_ack - 48 bit Acknowledgment Number Subheader (5.3) * @dccph_resp_service - Echoes the Service Code on a received DCCP-Request - * @dccph_resp_options - list of options (must be a multiple of 32 bits */ struct dccp_hdr_response { struct dccp_hdr_ack_bits dccph_resp_ack; - __u32 dccph_resp_service; + __be32 dccph_resp_service; }; /** * struct dccp_hdr_reset - Unconditionally shut down a connection * - * @dccph_reset_service - Echoes the Service Code on a received DCCP-Request - * @dccph_reset_options - list of options (must be a multiple of 32 bits + * @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; @@ -152,6 +144,8 @@ enum dccp_reset_codes { 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 */ @@ -160,6 +154,10 @@ enum { 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, @@ -170,169 +168,252 @@ enum { 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 features */ +/* 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 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_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 +#include #include #include #include #include -#include +#include +#include #include -#include enum dccp_state { - DCCP_OPEN = TCP_ESTABLISHED, - DCCP_REQUESTING = TCP_SYN_SENT, - DCCP_PARTOPEN = TCP_FIN_WAIT1, /* FIXME: - This mapping is horrible, but TCP has - no matching state for DCCP_PARTOPEN, - as TCP_SYN_RECV is already used by - DCCP_RESPOND, why don't stop using TCP - mapping of states? OK, now we don't use - sk_stream_sendmsg anymore, so doesn't - seem to exist any reason for us to - do the TCP mapping here */ - DCCP_LISTEN = TCP_LISTEN, - DCCP_RESPOND = TCP_SYN_RECV, - DCCP_CLOSING = TCP_CLOSING, - DCCP_TIME_WAIT = TCP_TIME_WAIT, - DCCP_CLOSED = TCP_CLOSE, - DCCP_MAX_STATES = TCP_MAX_STATES, + 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 }; -#define DCCP_STATE_MASK 0xf -#define DCCP_ACTION_FIN (1<<7) +#define DCCP_STATE_MASK 0x1f enum { - DCCPF_OPEN = TCPF_ESTABLISHED, - DCCPF_REQUESTING = TCPF_SYN_SENT, - DCCPF_PARTOPEN = TCPF_FIN_WAIT1, - DCCPF_LISTEN = TCPF_LISTEN, - DCCPF_RESPOND = TCPF_SYN_RECV, - DCCPF_CLOSING = TCPF_CLOSING, - DCCPF_TIME_WAIT = TCPF_TIME_WAIT, - DCCPF_CLOSED = TCPF_CLOSE, + 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->h.raw; + return (struct dccp_hdr *)skb_transport_header(skb); } -static inline struct dccp_hdr_ext *dccp_hdrx(const struct sk_buff *skb) +static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen) { - return (struct dccp_hdr_ext *)(skb->h.raw + sizeof(struct dccp_hdr)); + skb_push(skb, headlen); + skb_reset_transport_header(skb); + return memset(skb_transport_header(skb), 0, headlen); } -static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb) +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) { - const struct dccp_hdr *dh = dccp_hdr(skb); return sizeof(*dh) + (dh->dccph_x ? sizeof(struct dccp_hdr_ext) : 0); } -static inline __u64 dccp_hdr_seq(const struct sk_buff *skb) +static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb) { const struct dccp_hdr *dh = dccp_hdr(skb); -#if defined(__LITTLE_ENDIAN_BITFIELD) - __u64 seq_nr = ntohl(dh->dccph_seq << 8); -#elif defined(__BIG_ENDIAN_BITFIELD) - __u64 seq_nr = ntohl(dh->dccph_seq); -#else -#error "Adjust your defines" -#endif + 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(skb)->dccph_seq_low); + 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->h.raw + dccp_basic_hdr_len(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->h.raw + dccp_basic_hdr_len(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); -#if defined(__LITTLE_ENDIAN_BITFIELD) - return (((u64)ntohl(dhack->dccph_ack_nr_high << 8)) << 32) + ntohl(dhack->dccph_ack_nr_low); -#elif defined(__BIG_ENDIAN_BITFIELD) - return (((u64)ntohl(dhack->dccph_ack_nr_high)) << 32) + ntohl(dhack->dccph_ack_nr_low); -#else -#error "Adjust your defines" -#endif + 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->h.raw + dccp_basic_hdr_len(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->h.raw + dccp_basic_hdr_len(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_basic_hdr_len(skb) + - dccp_packet_hdr_len(dccp_hdr(skb)->dccph_type); + return __dccp_hdr_len(dccp_hdr(skb)); } /* initial values for each feature */ #define DCCPF_INITIAL_SEQUENCE_WINDOW 100 -/* FIXME: for now we're using CCID 3 (TFRC) */ -#define DCCPF_INITIAL_CCID 3 -#define DCCPF_INITIAL_SEND_ACK_VECTOR 0 +#define DCCPF_INITIAL_ACK_RATIO 2 +#define DCCPF_INITIAL_CCID DCCPC_CCID2 /* FIXME: for now we're default to 1 but it should really be 0 */ #define DCCPF_INITIAL_SEND_NDP_COUNT 1 -#define DCCP_NDP_LIMIT 0xFFFFFF - /** - * struct dccp_options - option values for a DCCP connection - * @dccpo_sequence_window - Sequence Window Feature (section 7.5.2) - * @dccpo_ccid - Congestion Control Id (CCID) (section 10) - * @dccpo_send_ack_vector - Send Ack Vector Feature (section 11.5) - * @dccpo_send_ndp_count - Send NDP Count Feature (7.7.2) + * 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_pending - List of features being negotiated + * @dccpms_conf - */ -struct dccp_options { - __u64 dccpo_sequence_window; - __u8 dccpo_ccid; - __u8 dccpo_send_ack_vector; - __u8 dccpo_send_ndp_count; +struct dccp_minisock { + __u64 dccpms_sequence_window; + struct list_head dccpms_pending; + struct list_head dccpms_conf; }; -extern void __dccp_options_init(struct dccp_options *dccpo); -extern void dccp_options_init(struct dccp_options *dccpo); -extern int dccp_parse_options(struct sock *sk, struct sk_buff *skb); +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 + */ struct dccp_request_sock { struct inet_request_sock dreq_inet_rsk; __u64 dreq_iss; __u64 dreq_isr; - __u32 dreq_service; + __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) @@ -340,14 +421,13 @@ static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req) return (struct dccp_request_sock *)req; } -/* Read about the ECN nonce to see why it is 253 */ -#define DCCP_MAX_ACK_VECTOR_LEN 253 +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 { - u32 dccpor_ndp:24, - dccpor_ack_vector_len:8; - u32 dccpor_ack_vector_idx:10; - /* 22 bits hole, try to pack */ + u64 dccpor_ndp:48; u32 dccpor_timestamp; u32 dccpor_timestamp_echo; u32 dccpor_elapsed_time; @@ -362,6 +442,28 @@ enum dccp_role { 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 * @@ -375,18 +477,35 @@ enum dccp_role { * @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_timestamp_time - time of latest TIMESTAMP option + * @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_ext_header_len - network protocol overhead (IP/IPv6 options) - * @dccps_pmtu_cookie - Last pmtu seen by socket - * @dccps_avg_packet_size - FIXME: has to be set by the app thru some setsockopt or ioctl, CCID3 uses it - * @dccps_role - Role of this sock, one of %dccp_role + * @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_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_hc_rx_ackpkts - receiver half connection acked packets + * @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_minisock - associated minisock (accessed via dccp_msk) + * @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_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_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 { /* 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; @@ -397,29 +516,41 @@ struct dccp_sock { __u64 dccps_gss; __u64 dccps_gsr; __u64 dccps_gar; - unsigned long dccps_service; - unsigned long dccps_timestamp_time; - __u32 dccps_timestamp_echo; - __u32 dccps_avg_packet_size; - unsigned long dccps_ndp_count; - __u16 dccps_ext_header_len; - __u32 dccps_pmtu_cookie; + __be32 dccps_service; __u32 dccps_mss_cache; - struct dccp_options dccps_options; - struct dccp_ackpkts *dccps_hc_rx_ackpkts; - void *dccps_hc_rx_ccid_private; - void *dccps_hc_tx_ccid_private; + 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; + __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 dccp_minisock dccps_minisock; + 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; 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; + struct timer_list dccps_xmit_timer; }; - + 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) {