X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=include%2Flinux%2Fdccp.h;h=aa0737019e37da6e759ea95e026088cbbfc6518d;hb=49eaeb4bc4c901c327ee259c7768be20fd020a30;hp=f3fc4392e93d74a470c94c40813851e5042d3518;hpb=4fa435018d740cb83d74c92306aa1f796da91ddd;p=linux-2.6-omap-h63xx.git diff --git a/include/linux/dccp.h b/include/linux/dccp.h index f3fc4392e93..aa0737019e3 100644 --- a/include/linux/dccp.h +++ b/include/linux/dccp.h @@ -144,6 +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 */ @@ -203,6 +205,7 @@ struct dccp_so_feat { #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_CCID_RX_INFO 128 @@ -225,37 +228,50 @@ struct dccp_so_feat { #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) @@ -270,10 +286,9 @@ static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen) return memset(skb_transport_header(skb), 0, headlen); } -static inline struct dccp_hdr_ext *dccp_hdrx(const struct sk_buff *skb) +static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh) { - return (struct dccp_hdr_ext *)(skb_transport_header(skb) + - sizeof(struct dccp_hdr)); + return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh)); } static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh) @@ -287,13 +302,12 @@ static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb) return __dccp_basic_hdr_len(dh); } -static inline __u64 dccp_hdr_seq(const struct sk_buff *skb) +static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh) { - const struct dccp_hdr *dh = dccp_hdr(skb); __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; @@ -393,13 +407,23 @@ struct dccp_opt_pend { extern void dccp_minisock_init(struct dccp_minisock *dmsk); -extern int dccp_parse_options(struct sock *sk, struct sk_buff *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) + * 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; + __u32 dreq_timestamp_echo; + __u32 dreq_timestamp_time; }; static inline struct dccp_request_sock *dccp_rsk(const struct request_sock *req) @@ -409,6 +433,9 @@ static inline struct dccp_request_sock *dccp_rsk(const struct 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 { u32 dccpor_ndp; /* only 24 bits */ u32 dccpor_timestamp; @@ -462,8 +489,8 @@ struct dccp_ackvec; * @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_time - time of latest TIMESTAMP option * @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_pcslen - sender partial checksum coverage (via sockopt) @@ -479,6 +506,7 @@ struct dccp_ackvec; * @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) */ @@ -497,15 +525,15 @@ struct dccp_sock { __u64 dccps_gsr; __u64 dccps_gar; __be32 dccps_service; + __u32 dccps_mss_cache; struct dccp_service_list *dccps_service_list; - ktime_t dccps_timestamp_time; __u32 dccps_timestamp_echo; + __u32 dccps_timestamp_time; __u16 dccps_l_ack_ratio; __u16 dccps_r_ack_ratio; __u16 dccps_pcslen; __u16 dccps_pcrlen; unsigned long dccps_ndp_count; - __u32 dccps_mss_cache; unsigned long dccps_rate_last; struct dccp_minisock dccps_minisock; struct dccp_ackvec *dccps_hc_rx_ackvec; @@ -515,6 +543,7 @@ struct dccp_sock { 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; };