X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fdccp.h;h=484e45c7c89a832dd986c7fe927e545168e2ec77;hb=e861b98d5e1be769ca6483b6df97149b956ea834;hp=ed6cc8962d87b9e8c50df5059b6c475450cf1a80;hpb=5aed324369c94a2c38469c8288e42eb1a9fac400;p=safe%2Fjmp%2Flinux-2.6 diff --git a/include/linux/dccp.h b/include/linux/dccp.h index ed6cc89..484e45c 100644 --- a/include/linux/dccp.h +++ b/include/linux/dccp.h @@ -56,10 +56,9 @@ struct dccp_hdr_ext { }; /** - * 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 { __be32 dccph_req_service; @@ -76,12 +75,10 @@ struct dccp_hdr_ack_bits { __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; @@ -91,8 +88,9 @@ struct dccp_hdr_response { /** * 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; @@ -146,6 +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 */ @@ -176,20 +176,20 @@ enum { }; /* DCCP features (RFC 4340 section 6.4) */ - enum { - DCCPF_RESERVED = 0, - DCCPF_CCID = 1, +enum { + DCCPF_RESERVED = 0, + DCCPF_CCID = 1, DCCPF_SHORT_SEQNOS = 2, /* XXX: not yet implemented */ - DCCPF_SEQUENCE_WINDOW = 3, + DCCPF_SEQUENCE_WINDOW = 3, DCCPF_ECN_INCAPABLE = 4, /* XXX: not yet implemented */ - DCCPF_ACK_RATIO = 5, - DCCPF_SEND_ACK_VECTOR = 6, - DCCPF_SEND_NDP_COUNT = 7, + DCCPF_ACK_RATIO = 5, + DCCPF_SEND_ACK_VECTOR = 6, + DCCPF_SEND_NDP_COUNT = 7, DCCPF_MIN_CSUM_COVER = 8, DCCPF_DATA_CHECKSUM = 9, /* XXX: not yet implemented */ - /* 10-127 reserved */ - DCCPF_MIN_CCID_SPECIFIC = 128, - DCCPF_MAX_CCID_SPECIFIC = 255, + /* 10-127 reserved */ + DCCPF_MIN_CCID_SPECIFIC = 128, + DCCPF_MAX_CCID_SPECIFIC = 255, }; /* this structure is argument to DCCP_SOCKOPT_CHANGE_X */ @@ -204,6 +204,8 @@ struct dccp_so_feat { #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_CCID_RX_INFO 128 @@ -215,6 +217,7 @@ struct dccp_so_feat { #ifdef __KERNEL__ #include +#include #include #include #include @@ -225,54 +228,67 @@ 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) { - return (struct dccp_hdr *)skb->h.raw; + return (struct dccp_hdr *)skb_transport_header(skb); } static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen) { - skb->h.raw = skb_push(skb, headlen); - memset(skb->h.raw, 0, headlen); - return dccp_hdr(skb); + 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 sk_buff *skb) +static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh) { - return (struct dccp_hdr_ext *)(skb->h.raw + 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) @@ -286,13 +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; @@ -301,12 +316,14 @@ static inline __u64 dccp_hdr_seq(const struct sk_buff *skb) 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) @@ -317,12 +334,14 @@ static inline u64 dccp_hdr_ack_seq(const struct sk_buff *skb) 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) @@ -386,16 +405,25 @@ struct dccp_opt_pend { struct dccp_opt_conf *dccpop_sc; }; -extern void __dccp_minisock_init(struct dccp_minisock *dmsk); 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) @@ -405,6 +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; @@ -427,7 +458,7 @@ struct dccp_service_list { }; #define DCCP_SERVICE_INVALID_VALUE htonl((__u32)-1) -#define DCCP_SERVICE_CODE_IS_ABSENT 0 +#define DCCP_SERVICE_CODE_IS_ABSENT 0 static inline int dccp_list_has_service(const struct dccp_service_list *sl, const __be32 service) @@ -436,7 +467,7 @@ static inline int dccp_list_has_service(const struct dccp_service_list *sl, u32 i = sl->dccpsl_nr; while (i--) if (sl->dccpsl_list[i] == service) - return 1; + return 1; } return 0; } @@ -458,28 +489,31 @@ 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_l_ack_ratio - - * @dccps_r_ack_ratio - + * @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_ndp_count - number of Non Data Packets since last data packet - * @dccps_mss_cache - - * @dccps_minisock - + * @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_hc_rx_ackvec - rx half connection ack vector - * @dccps_hc_rx_ccid - - * @dccps_hc_tx_ccid - - * @dccps_options_received - - * @dccps_epoch - - * @dccps_role - Role of this sock, one of %dccp_role - * @dccps_hc_rx_insert_options - - * @dccps_hc_tx_insert_options - + * @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; @@ -492,26 +526,27 @@ struct dccp_sock { __u64 dccps_gar; __be32 dccps_service; struct dccp_service_list *dccps_service_list; - struct timeval 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; struct ccid *dccps_hc_rx_ccid; struct ccid *dccps_hc_tx_ccid; struct dccp_options_received dccps_options_received; - struct timeval dccps_epoch; 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;