};
/**
- * 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;
__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;
/**
* 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;
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 */
#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_SEND_CSCOV 10
#define DCCP_SOCKOPT_RECV_CSCOV 11
#define DCCP_SOCKOPT_CCID_RX_INFO 128
#ifdef __KERNEL__
#include <linux/in.h>
+#include <linux/ktime.h>
#include <linux/list.h>
#include <linux/uio.h>
#include <linux/workqueue.h>
#include <net/tcp_states.h>
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 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)
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;
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);
* @dccps_pcrlen - receiver partial checksum coverage (via sockopt)
* @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_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)
__u64 dccps_gar;
__be32 dccps_service;
struct dccp_service_list *dccps_service_list;
- struct timeval dccps_timestamp_time;
+ ktime_t dccps_timestamp_time;
__u32 dccps_timestamp_echo;
__u16 dccps_l_ack_ratio;
__u16 dccps_r_ack_ratio;
__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;
projects / linux-2.6 / blobdiff