Differential D15525 Diff 43430 head/sys/netinet/tcp_var.h

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head/sys/netinet/tcp_var.h

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*/		*/
struct tcpcb {		struct tcpcb {
/* Cache line 1 */		/* Cache line 1 */
struct inpcb t_inpcb; / back pointer to internet pcb */		struct inpcb t_inpcb; / back pointer to internet pcb */
struct tcp_function_block t_fb;/ TCP function call block */		struct tcp_function_block t_fb;/ TCP function call block */
void t_fb_ptr; / Pointer to t_fb specific data */		void t_fb_ptr; / Pointer to t_fb specific data */
uint32_t t_maxseg:24, /* maximum segment size */		uint32_t t_maxseg:24, /* maximum segment size */
t_logstate:8; /* State of "black box" logging */		t_logstate:8; /* State of "black box" logging */
uint32_t t_state:4, /* state of this connection */		uint32_t t_port:16, /* Tunneling (over udp) port */
bits_spare : 24;		t_state:4, /* state of this connection */
		t_idle_reduce : 1,
		t_delayed_ack: 7, /* Delayed ack variable */
		bits_spare : 4;
u_int t_flags;		u_int t_flags;
tcp_seq snd_una; /* sent but unacknowledged */		tcp_seq snd_una; /* sent but unacknowledged */
tcp_seq snd_max; /* highest sequence number sent;		tcp_seq snd_max; /* highest sequence number sent;
* used to recognize retransmits		* used to recognize retransmits
*/		*/
tcp_seq snd_nxt; /* send next */		tcp_seq snd_nxt; /* send next */
tcp_seq snd_up; /* send urgent pointer */		tcp_seq snd_up; /* send urgent pointer */
uint32_t snd_wnd; /* send window */		uint32_t snd_wnd; /* send window */
uint32_t snd_cwnd; /* congestion-controlled window */		uint32_t snd_cwnd; /* congestion-controlled window */
uint32_t cl1_spare; /* Spare to round out CL 1 */		uint32_t t_peakrate_thr; /* pre-calculated peak rate threshold */
/* Cache line 2 */		/* Cache line 2 */
u_int32_t ts_offset; /* our timestamp offset */		u_int32_t ts_offset; /* our timestamp offset */
u_int32_t rfbuf_ts; /* recv buffer autoscaling timestamp */		u_int32_t rfbuf_ts; /* recv buffer autoscaling timestamp */
int rcv_numsacks; /* # distinct sack blks present */		int rcv_numsacks; /* # distinct sack blks present */
u_int t_tsomax; /* TSO total burst length limit in bytes */		u_int t_tsomax; /* TSO total burst length limit in bytes */
u_int t_tsomaxsegcount; /* TSO maximum segment count */		u_int t_tsomaxsegcount; /* TSO maximum segment count */
u_int t_tsomaxsegsize; /* TSO maximum segment size in bytes */		u_int t_tsomaxsegsize; /* TSO maximum segment size in bytes */
tcp_seq rcv_nxt; /* receive next */		tcp_seq rcv_nxt; /* receive next */
▲ Show 20 Lines • Show All 68 Lines • ▼ Show 20 Lines	struct tcpcb {
struct toedev tod; / toedev handling this connection */		struct toedev tod; / toedev handling this connection */
int t_sndrexmitpack; /* retransmit packets sent */		int t_sndrexmitpack; /* retransmit packets sent */
int t_rcvoopack; /* out-of-order packets received */		int t_rcvoopack; /* out-of-order packets received */
void t_toe; / TOE pcb pointer */		void t_toe; / TOE pcb pointer */
struct cc_algo cc_algo; / congestion control algorithm */		struct cc_algo cc_algo; / congestion control algorithm */
struct cc_var ccv; / congestion control specific vars */		struct cc_var ccv; / congestion control specific vars */
struct osd osd; / storage for Khelp module data */		struct osd osd; / storage for Khelp module data */
int t_bytes_acked; /* # bytes acked during current RTT */		int t_bytes_acked; /* # bytes acked during current RTT */
		u_int t_maxunacktime;
u_int t_keepinit; /* time to establish connection */		u_int t_keepinit; /* time to establish connection */
u_int t_keepidle; /* time before keepalive probes begin */		u_int t_keepidle; /* time before keepalive probes begin */
u_int t_keepintvl; /* interval between keepalives */		u_int t_keepintvl; /* interval between keepalives */
u_int t_keepcnt; /* number of keepalives before close */		u_int t_keepcnt; /* number of keepalives before close */
int t_dupacks; /* consecutive dup acks recd */		int t_dupacks; /* consecutive dup acks recd */
int t_lognum; /* Number of log entries */		int t_lognum; /* Number of log entries */
struct tcp_log_stailq t_logs; /* Log buffer */		struct tcp_log_stailq t_logs; /* Log buffer */
struct tcp_log_id_node *t_lin;		struct tcp_log_id_node *t_lin;
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/*		/*
* Flags for the extended TCP flags field, t_flags2		* Flags for the extended TCP flags field, t_flags2
*/		*/
#define TF2_PLPMTU_BLACKHOLE 0x00000001 /* Possible PLPMTUD Black Hole. */		#define TF2_PLPMTU_BLACKHOLE 0x00000001 /* Possible PLPMTUD Black Hole. */
#define TF2_PLPMTU_PMTUD 0x00000002 /* Allowed to attempt PLPMTUD. */		#define TF2_PLPMTU_PMTUD 0x00000002 /* Allowed to attempt PLPMTUD. */
#define TF2_PLPMTU_MAXSEGSNT 0x00000004 /* Last seg sent was full seg. */		#define TF2_PLPMTU_MAXSEGSNT 0x00000004 /* Last seg sent was full seg. */
#define TF2_LOG_AUTO 0x00000008 /* Session is auto-logging. */		#define TF2_LOG_AUTO 0x00000008 /* Session is auto-logging. */
		#define TF2_DROP_AF_DATA 0x00000010 /* Drop after all data ack'd */

/*		/*
* Structure to hold TCP options that are only used during segment		* Structure to hold TCP options that are only used during segment
* processing (in tcp_input), but not held in the tcpcb.		* processing (in tcp_input), but not held in the tcpcb.
* It's basically used to reduce the number of parameters		* It's basically used to reduce the number of parameters
* to tcp_dooptions and tcp_addoptions.		* to tcp_dooptions and tcp_addoptions.
* The binary order of the to_flags is relevant for packing of the		* The binary order of the to_flags is relevant for packing of the
* options in tcp_addoptions.		* options in tcp_addoptions.
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struct tcp_hhook_data {		struct tcp_hhook_data {
struct tcpcb *tp;		struct tcpcb *tp;
struct tcphdr *th;		struct tcphdr *th;
struct tcpopt *to;		struct tcpopt *to;
uint32_t len;		uint32_t len;
int tso;		int tso;
tcp_seq curack;		tcp_seq curack;
};		};
		#ifdef TCP_HHOOK
		void hhook_run_tcp_est_out(struct tcpcb *tp,
		struct tcphdr th, struct tcpopt to,
		uint32_t len, int tso);
#endif		#endif
		#endif

/*		/*
* TCB structure exported to user-land via sysctl(3).		* TCB structure exported to user-land via sysctl(3).
*		*
* Fields prefixed with "xt_" are unique to the export structure, and fields		* Fields prefixed with "xt_" are unique to the export structure, and fields
* with "t_" or other prefixes match corresponding fields of 'struct tcpcb'.		* with "t_" or other prefixes match corresponding fields of 'struct tcpcb'.
*		*
* Legend:		* Legend:
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#define V_tcp_minmss VNET(tcp_minmss)		#define V_tcp_minmss VNET(tcp_minmss)
#define V_tcp_mssdflt VNET(tcp_mssdflt)		#define V_tcp_mssdflt VNET(tcp_mssdflt)
#define V_tcp_recvspace VNET(tcp_recvspace)		#define V_tcp_recvspace VNET(tcp_recvspace)
#define V_tcp_sack_globalholes VNET(tcp_sack_globalholes)		#define V_tcp_sack_globalholes VNET(tcp_sack_globalholes)
#define V_tcp_sack_globalmaxholes VNET(tcp_sack_globalmaxholes)		#define V_tcp_sack_globalmaxholes VNET(tcp_sack_globalmaxholes)
#define V_tcp_sack_maxholes VNET(tcp_sack_maxholes)		#define V_tcp_sack_maxholes VNET(tcp_sack_maxholes)
#define V_tcp_sc_rst_sock_fail VNET(tcp_sc_rst_sock_fail)		#define V_tcp_sc_rst_sock_fail VNET(tcp_sc_rst_sock_fail)
#define V_tcp_sendspace VNET(tcp_sendspace)		#define V_tcp_sendspace VNET(tcp_sendspace)
		#define V_tcp_udp_tunneling_overhead VNET(tcp_udp_tunneling_overhead)
		#define V_tcp_udp_tunneling_port VNET(tcp_udp_tunneling_port)


#ifdef TCP_HHOOK		#ifdef TCP_HHOOK
VNET_DECLARE(struct hhook_head *, tcp_hhh[HHOOK_TCP_LAST + 1]);		VNET_DECLARE(struct hhook_head *, tcp_hhh[HHOOK_TCP_LAST + 1]);
#define V_tcp_hhh VNET(tcp_hhh)		#define V_tcp_hhh VNET(tcp_hhh)
#endif		#endif

int tcp_addoptions(struct tcpopt , u_char );		int tcp_addoptions(struct tcpopt , u_char );
int tcp_ccalgounload(struct cc_algo *unload_algo);		int tcp_ccalgounload(struct cc_algo *unload_algo);
struct tcpcb *		struct tcpcb *
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int tcp_twcheck(struct inpcb , struct tcpopt , struct tcphdr *,		int tcp_twcheck(struct inpcb , struct tcpopt , struct tcphdr *,
struct mbuf *, int);		struct mbuf *, int);
void tcp_setpersist(struct tcpcb *);		void tcp_setpersist(struct tcpcb *);
void tcp_slowtimo(void);		void tcp_slowtimo(void);
struct tcptemp *		struct tcptemp *
tcpip_maketemplate(struct inpcb *);		tcpip_maketemplate(struct inpcb *);
void tcpip_fillheaders(struct inpcb , void , void *);		void tcpip_fillheaders(struct inpcb , void , void *);
void tcp_timer_activate(struct tcpcb *, uint32_t, u_int);		void tcp_timer_activate(struct tcpcb *, uint32_t, u_int);
		int tcp_timer_suspend(struct tcpcb *, uint32_t);
		void tcp_timers_unsuspend(struct tcpcb *, uint32_t);
int tcp_timer_active(struct tcpcb *, uint32_t);		int tcp_timer_active(struct tcpcb *, uint32_t);
void tcp_timer_stop(struct tcpcb *, uint32_t);		void tcp_timer_stop(struct tcpcb *, uint32_t);
void tcp_trace(short, short, struct tcpcb , void , struct tcphdr *, int);		void tcp_trace(short, short, struct tcpcb , void , struct tcphdr *, int);
		int inp_to_cpuid(struct inpcb *inp);
/*		/*
* All tcp_hc_* functions are IPv4 and IPv6 (via in_conninfo)		* All tcp_hc_* functions are IPv4 and IPv6 (via in_conninfo)
*/		*/
void tcp_hc_init(void);		void tcp_hc_init(void);
#ifdef VIMAGE		#ifdef VIMAGE
void tcp_hc_destroy(void);		void tcp_hc_destroy(void);
#endif		#endif
void tcp_hc_get(struct in_conninfo , struct hc_metrics_lite );		void tcp_hc_get(struct in_conninfo , struct hc_metrics_lite );
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void tcp_clean_sackreport(struct tcpcb *tp);		void tcp_clean_sackreport(struct tcpcb *tp);
void tcp_sack_adjust(struct tcpcb *tp);		void tcp_sack_adjust(struct tcpcb *tp);
struct sackhole tcp_sack_output(struct tcpcb tp, int *sack_bytes_rexmt);		struct sackhole tcp_sack_output(struct tcpcb tp, int *sack_bytes_rexmt);
void tcp_sack_partialack(struct tcpcb , struct tcphdr );		void tcp_sack_partialack(struct tcpcb , struct tcphdr );
void tcp_free_sackholes(struct tcpcb *tp);		void tcp_free_sackholes(struct tcpcb *tp);
int tcp_newreno(struct tcpcb , struct tcphdr );		int tcp_newreno(struct tcpcb , struct tcphdr );
int tcp_compute_pipe(struct tcpcb *);		int tcp_compute_pipe(struct tcpcb *);
void tcp_sndbuf_autoscale(struct tcpcb , struct socket , uint32_t);		void tcp_sndbuf_autoscale(struct tcpcb , struct socket , uint32_t);
		struct mbuf *
		tcp_m_copym(struct mbuf m, int32_t off0, int32_t plen,
		int32_t seglimit, int32_t segsize, struct sockbuf *sb);


static inline void		static inline void
tcp_fields_to_host(struct tcphdr *th)		tcp_fields_to_host(struct tcphdr *th)
{		{

th->th_seq = ntohl(th->th_seq);		th->th_seq = ntohl(th->th_seq);
th->th_ack = ntohl(th->th_ack);		th->th_ack = ntohl(th->th_ack);
th->th_win = ntohs(th->th_win);		th->th_win = ntohs(th->th_win);
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