/*
- * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2016 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
- *
+ *
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
- *
+ *
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
- *
+ *
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
#define _TCPCB_LIST_HEAD(name, type) \
struct name { \
u_int32_t lh_first; \
-};
+}
#else
#define _TCPCB_PTR(x) x
#define _TCPCB_LIST_HEAD(name, type) LIST_HEAD(name, type)
#ifdef KERNEL_PRIVATE
-#define TCP_RETRANSHZ 1000 /* granularity of TCP timestamps, 1ms */
+#define TCP_RETRANSHZ 1000 /* granularity of TCP timestamps, 1ms */
/* Minimum time quantum within which the timers are coalesced */
#define TCP_TIMER_10MS_QUANTUM (TCP_RETRANSHZ/100) /* every 10ms */
#define TCP_TIMER_100MS_QUANTUM (TCP_RETRANSHZ/10) /* every 100ms */
#define N_TIME_WAIT_SLOTS 128 /* must be power of 2 */
-/* Always allow at least 4 packets worth of recv window when adjusting
+/* Always allow at least 16 packets worth of recv window when adjusting
* recv window using inter-packet arrival jitter.
*/
-#define MIN_IAJ_WIN 4
+#define MIN_IAJ_WIN 16
-/* A variation in delay of this many milliseconds is tolerable. This limit has to
+/* A variation in delay of this many milliseconds is tolerable. This limit has to
* be low but greater than zero. We also use standard deviation on jitter to adjust
* this limit for different link and connection types.
*/
*/
#define ACC_IAJ_HIGH_THRESH 100
-/* When accumulated IAJ reaches this value, the receiver starts to react by
+/* When accumulated IAJ reaches this value, the receiver starts to react by
* closing the window
*/
#define ACC_IAJ_REACT_LIMIT 200
-/* If the number of small packets (smaller than IAJ packet size) seen on a
+/* If the number of small packets (smaller than IAJ packet size) seen on a
* connection is more than this threshold, reset the size and learn it again.
* This is needed because the sender might send smaller segments after PMTU
* discovery and the receiver has to learn the new size.
/*
* Adaptive timeout is a read/write timeout specified by the application to
- * get a socket event when the transport layer detects a stall in data
- * transfer. The value specified is the number of probes that can be sent
+ * get a socket event when the transport layer detects a stall in data
+ * transfer. The value specified is the number of probes that can be sent
* to the peer before generating an event. Since it is not specified as
* a time value, the timeout will adjust based on the RTT seen on the link.
- * The timeout will start only when there is an indication that the read/write
- * operation is not making progress.
+ * The timeout will start only when there is an indication that the read/write
+ * operation is not making progress.
*
* If a write operation stalls, the probe will be retransmission of data.
* If a read operation stalls, the probe will be a keep-alive packet.
SLIST_ENTRY(tcp_rxt_seg) rx_link;
};
+struct tcp_notify_ack_marker {
+ tcp_seq notify_snd_una; /* Notify when snd_una crosses this seq */
+ tcp_notify_ack_id_t notify_id;
+ SLIST_ENTRY(tcp_notify_ack_marker) notify_next;
+};
+
struct tcptemp {
u_char tt_ipgen[40]; /* the size must be of max ip header, now IPv6 */
struct tcphdr tt_t;
#define TF_WASFRECOVERY 0x400000 /* was in NewReno Fast Recovery */
#define TF_SIGNATURE 0x800000 /* require MD5 digests (RFC2385) */
#define TF_MAXSEGSNT 0x1000000 /* last segment sent was a full segment */
+#define TF_STREAMING_ON 0x2000000 /* Receiver detected streaming */
#define TF_PMTUD 0x4000000 /* Perform Path MTU Discovery for this connection */
#define TF_CLOSING 0x8000000 /* pending tcp close */
#define TF_TSO 0x10000000 /* TCP Segment Offloading is enable on this connection */
*/
tcp_seq snd_recover; /* for use in NewReno Fast Recovery */
- u_int t_maxopd; /* mss plus options */
-
+ u_int32_t t_maxopd; /* mss plus options */
u_int32_t t_rcvtime; /* time at which a packet was received */
u_int32_t t_starttime; /* time connection was established */
int t_rtttime; /* tcp clock when rtt calculation was started */
/* State for limiting early retransmits when SACK is not enabled */
u_int16_t t_early_rexmt_count; /* count of early rexmts */
- u_int32_t t_early_rexmt_win; /* window for limiting early rexmts */
+ u_int32_t t_early_rexmt_win; /* window for limiting early rexmts */
u_int32_t ts_recent; /* timestamp echo data */
u_int32_t rcv_unackwin; /* to measure win for stretching acks */
u_int32_t rcv_by_unackwin; /* bytes seen during the last ack-stretching win */
u_int32_t rcv_nostrack_ts; /* timestamp when stretch ack was disabled automatically */
+ u_int32_t rcv_nostrack_pkts; /* pkts received since strech ack was disabled */
u_int16_t rcv_waitforss; /* wait for packets during slow-start */
/* ECN stats */
u_int32_t t_ecn_recv_ce; /* Received CE from the network */
u_int32_t t_ecn_recv_cwr; /* Packets received with CWR */
- u_int8_t t_ecn_recv_ce_pkt; /* Received packet with CE-bit set (independent from last_ack_sent) */
/* state for bad retransmit recovery */
u_int32_t snd_cwnd_prev; /* cwnd prior to retransmit */
int t_srtt_prev; /* srtt prior to retransmit */
int t_rttvar_prev; /* rttvar prior to retransmit */
u_int32_t t_badrexmt_time; /* bad rexmt detection time */
-
+
/* Packet reordering metric */
u_int16_t t_reorderwin; /* Reordering late time offset */
int rcv_numsacks; /* # distinct sack blks present */
struct sackblk sackblks[MAX_SACK_BLKS]; /* seq nos. of sack blocks */
struct sackhint sackhint; /* SACK scoreboard hint */
-
+
struct mbuf *t_pktlist_head; /* First packet in transmit chain */
struct mbuf *t_pktlist_tail; /* Last packet in transmit chain */
u_int32_t t_pktlist_sentlen; /* total bytes in transmit chain */
u_int32_t t_keepidle; /* keepalive idle timer (override global if > 0) */
- u_int32_t t_keepinit; /* connection timeout, i.e. idle time
+ u_int32_t t_keepinit; /* connection timeout, i.e. idle time
in SYN_SENT or SYN_RECV state */
u_int32_t t_keepintvl; /* interval between keepalives */
u_int32_t t_keepcnt; /* number of keepalives before close */
u_int16_t t_pmtud_lastseg_size; /* size of the last sent segment */
u_int16_t t_pmtud_saved_maxopd; /* MSS saved before performing PMTU-D BlackHole detection */
u_int32_t t_pmtud_start_ts; /* Time of PMTUD blackhole detection */
-
+
struct
{
u_int32_t rxduplicatebytes;
u_int16_t unused_pad_to_8;
u_int32_t rxmitpkts;
} t_stat;
-
- /* Background congestion related state */
+ u_int8_t t_notify_ack_count;
+ u_int8_t t_ecn_recv_ce_pkt; /* Received packet with CE-bit set (independent from last_ack_sent) */
+ u_int16_t t_cached_maxopd; /* default for MSS adjustment using link status report */
+
uint32_t bg_ssthresh; /* Slow start threshold until delay increases */
uint32_t t_flagsext; /* Another field to accommodate more flags */
#define TF_RXTFINDROP 0x1 /* Drop conn after retransmitting FIN 3 times */
#define TF_DETECT_READSTALL 0x80 /* Used to detect a stall during read operation */
#define TF_RECV_THROTTLE 0x100 /* Input throttling active */
#define TF_NOSTRETCHACK 0x200 /* ack every other packet */
-#define TF_STREAMEOW 0x400 /* Last packet was small indicating end of write */
#define TF_NOTIMEWAIT 0x800 /* Avoid going into time-wait */
#define TF_SENT_TLPROBE 0x1000 /* Sent data in PTO */
#define TF_PKTS_REORDERED 0x2000 /* Detected reordering */
#define TF_CWND_NONVALIDATED 0x100000 /* cwnd non validated */
#define TF_PROBING 0x200000 /* Trigger probe timeout */
#define TF_FASTOPEN 0x400000 /* TCP Fastopen is enabled */
+#define TF_REASS_INPROG 0x800000 /* Reassembly is in progress */
#if TRAFFIC_MGT
/* Inter-arrival jitter related state */
uint32_t avg_iaj; /* Mean */
uint32_t std_dev_iaj; /* Standard deviation */
#endif /* TRAFFIC_MGT */
- struct bwmeas *t_bwmeas; /* State for bandwidth measurement */
+ struct bwmeas *t_bwmeas; /* State for bandwidth measurement */
uint32_t t_lropktlen; /* Bytes in a LRO frame */
tcp_seq t_idleat; /* rcv_nxt at idle time */
TAILQ_ENTRY(tcpcb) t_twentry; /* link for time wait queue */
#define TMPF_PREESTABLISHED 0x00000001 /* conn in pre-established state */
#define TMPF_SENT_KEYS 0x00000002 /* indicates that keys were sent */
#define TMPF_MPTCP_TRUE 0x00000004 /* negotiated MPTCP successfully */
-#define TMPF_MPTCP_RCVD_KEY 0x00000008 /* state for 3-way handshake */
+#define TMPF_MPTCP_RCVD_KEY 0x00000008 /* state for 3-way handshake */
#define TMPF_SND_MPPRIO 0x00000010 /* send priority of subflow */
#define TMPF_SND_REM_ADDR 0x00000020 /* initiate address removal */
-#define TMPF_UNUSED 0x00000040 /* address addition acked by peer */
+#define TMPF_RCVD_DACK 0x00000040 /* received a data-ack */
#define TMPF_JOINED_FLOW 0x00000080 /* Indicates additional flow */
#define TMPF_BACKUP_PATH 0x00000100 /* Indicates backup path */
#define TMPF_MPTCP_ACKNOW 0x00000200 /* Send Data ACK */
#define TMPF_RECVD_JOIN 0x00004000 /* Received Join */
#define TMPF_RESET 0x00008000 /* Send RST */
#define TMPF_TCP_FALLBACK 0x00010000 /* Fallback to TCP */
-#define TMPF_FASTCLOSE 0x00020000 /* Send Fastclose option */
+#define TMPF_FASTCLOSERCV 0x00020000 /* Received Fastclose option */
#define TMPF_EMBED_DSN 0x00040000 /* tp has DSN mapping */
#define TMPF_MPTCP_READY 0x00080000 /* Can send DSS options on data */
#define TMPF_INFIN_SENT 0x00100000 /* Sent infinite mapping */
#define TFO_S_SYN_DATA_SENT 0x40 /* SYN+data sent */
#define TFO_S_SYN_DATA_ACKED 0x80 /* SYN+data has been acknowledged in SYN/ACK */
#define TFO_S_SYN_LOSS 0x0100 /* SYN+TFO has been lost - fallback to regular TCP */
+#define TFO_S_COOKIE_WRONG 0x0200 /* Cookie we sent in the SYN was wrong */
+#define TFO_S_NO_COOKIE_RCV 0x0400 /* We asked for a cookie but didn't get one */
+#define TFO_S_HEURISTICS_DISABLE 0x0800 /* TFO-heuristics disabled it for this connection */
+#define TFO_S_SEND_BLACKHOLE 0x1000 /* TFO got blackholed in the send direction */
+#define TFO_S_RECV_BLACKHOLE 0x2000 /* TFO got blackholed in the recv direction */
u_int16_t t_tfo_stats;
u_int8_t t_tfo_probes; /* TFO-probes we did send */
#define TFO_PROBE_PROBING 1 /* Sending out TCP-keepalives waiting for reply */
#define TFO_PROBE_WAIT_DATA 2 /* Received reply, waiting for data */
u_int8_t t_tfo_probe_state;
-
+
u_int32_t t_rcvoopack; /* out-of-order packets received */
u_int32_t t_pawsdrop; /* segments dropped due to PAWS */
u_int32_t t_sack_recovery_episode; /* SACK recovery episodes */
u_int32_t t_reordered_pkts; /* packets reorderd */
u_int32_t t_dsack_sent; /* Sent DSACK notification */
u_int32_t t_dsack_recvd; /* Received a valid DSACK option */
- u_int32_t t_recv_throttle_ts;
+ SLIST_HEAD(,tcp_notify_ack_marker) t_notify_ack; /* state for notifying data acknowledgements */
+ u_int32_t t_recv_throttle_ts; /* TS for start of recv throttle */
};
#define IN_FASTRECOVERY(tp) (tp->t_flags & TF_FASTRECOVERY)
#define SACK_ENABLED(tp) (tp->t_flagsext & TF_SACK_ENABLE)
/*
- * If the connection is in a throttled state due to advisory feedback from
+ * If the connection is in a throttled state due to advisory feedback from
* the interface output queue, reset that state. We do this in favor
- * of entering recovery because the data transfer during recovery
+ * of entering recovery because the data transfer during recovery
* should be just a trickle and it will help to improve performance.
* We also do not want to back off twice in the same RTT.
*/
} while(0)
/*
- * When the number of duplicate acks received is less than
+ * When the number of duplicate acks received is less than
* the retransmit threshold, use Limited Transmit algorithm
*/
extern int tcprexmtthresh;
(SEQ_LEQ((_seq_), (_tp_)->snd_max) && \
SEQ_GEQ((_seq_), ((_una_) - TCP_DSACK_MAX_SEND_WINDOW(_tp_))))
+#define TCP_RESET_REXMT_STATE(_tp_) do { \
+ (_tp_)->t_rxtshift = 0; \
+ (_tp_)->t_rxtstart = 0; \
+} while(0);
+
+#define TCP_AUTORCVBUF_MAX(_ifp_) (((_ifp_) != NULL && \
+ ((_ifp_)->if_eflags & IFEF_3CA)) ? tcp_autorcvbuf_max_ca : \
+ tcp_autorcvbuf_max)
enum tcp_cc_event {
TCP_CC_CWND_INIT, /* 0 */
#define sototcpcb(so) (intotcpcb(sotoinpcb(so)))
/*
- * The rtt measured is in milliseconds as the timestamp granularity is
+ * The rtt measured is in milliseconds as the timestamp granularity is
* a millisecond. The smoothed round-trip time and estimated variance
* are stored as fixed point numbers scaled by the values below.
* For convenience, these scales are also used in smoothing the average
u_int32_t tcps_tfo_syn_data_acked;/* SYN+data has been acknowledged */
u_int32_t tcps_tfo_syn_loss; /* SYN+TFO has been lost and we fallback */
u_int32_t tcps_tfo_blackhole; /* TFO got blackholed by a middlebox. */
+ u_int32_t tcps_tfo_cookie_wrong; /* TFO-cookie we sent was wrong */
+ u_int32_t tcps_tfo_no_cookie_rcv; /* We asked for a cookie but didn't get one */
+ u_int32_t tcps_tfo_heuristics_disable; /* TFO got disabled due to heuristics */
+ u_int32_t tcps_tfo_sndblackhole; /* TFO got blackholed in the sending direction */
+ u_int32_t tcps_mss_to_default; /* Change MSS to default using link status report */
+ u_int32_t tcps_mss_to_medium; /* Change MSS to medium using link status report */
+ u_int32_t tcps_mss_to_low; /* Change MSS to low using link status report */
+ u_int32_t tcps_ecn_fallback_droprst; /* ECN fallback caused by connection drop due to RST */
+ u_int32_t tcps_ecn_fallback_droprxmt; /* ECN fallback due to drop after multiple retransmits */
};
u_int64_t t_segq;
int t_dupacks; /* consecutive dup acks recd */
-
+
int t_timer[TCPT_NTIMERS_EXT]; /* tcp timers */
-
+
int t_state; /* state of this connection */
u_int t_flags;
-
+
int t_force; /* 1 if forcing out a byte */
-
+
tcp_seq snd_una; /* send unacknowledged */
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_up; /* send urgent pointer */
-
+
tcp_seq snd_wl1; /* window update seg seq number */
tcp_seq snd_wl2; /* window update seg ack number */
tcp_seq iss; /* initial send sequence number */
tcp_seq irs; /* initial receive sequence number */
-
+
tcp_seq rcv_nxt; /* receive next */
tcp_seq rcv_adv; /* advertised window */
u_int32_t rcv_wnd; /* receive window */
tcp_seq rcv_up; /* receive urgent pointer */
-
+
u_int32_t snd_wnd; /* send window */
u_int32_t snd_cwnd; /* congestion-controlled window */
u_int32_t snd_ssthresh; /* snd_cwnd size threshold for
- * for slow start exponential to
- * linear switch
- */
+ * for slow start exponential to
+ * linear switch
+ */
u_int t_maxopd; /* mss plus options */
-
+
u_int32_t t_rcvtime; /* time at which a packet was received */
u_int32_t t_starttime; /* time connection was established */
int t_rtttime; /* round trip time */
tcp_seq t_rtseq; /* sequence number being timed */
-
+
int t_rxtcur; /* current retransmit value (ticks) */
u_int t_maxseg; /* maximum segment size */
int t_srtt; /* smoothed round-trip time */
int t_rttvar; /* variance in round-trip time */
-
+
int t_rxtshift; /* log(2) of rexmt exp. backoff */
u_int t_rttmin; /* minimum rtt allowed */
u_int32_t t_rttupdated; /* number of times rtt sampled */
u_int32_t max_sndwnd; /* largest window peer has offered */
-
+
int t_softerror; /* possible error not yet reported */
/* out-of-band data */
char t_oobflags; /* have some */
u_char request_r_scale; /* pending window scaling */
u_char requested_s_scale;
u_int32_t ts_recent; /* timestamp echo data */
-
+
u_int32_t ts_recent_age; /* when last updated */
tcp_seq last_ack_sent;
/* RFC 1644 variables */
extern int tcp_do_rfc3390; /* Calculate ss_fltsz according to RFC 3390 */
extern int tcp_do_rfc1323;
extern int target_qdelay;
-extern u_int32_t tcp_now; /* for RFC 1323 timestamps */
+extern u_int32_t tcp_now; /* for RFC 1323 timestamps */
extern struct timeval tcp_uptime;
extern lck_spin_t *tcp_uptime_lock;
extern int tcp_delack_enabled;
extern struct zone *tcp_rxt_seg_zone;
extern int tcp_ecn_outbound;
extern int tcp_ecn_inbound;
-
-
-#if CONFIG_IFEF_NOWINDOWSCALE
-extern int tcp_obey_ifef_nowindowscale;
-#endif
+extern u_int32_t tcp_autorcvbuf_max;
+extern u_int32_t tcp_autorcvbuf_max_ca;
+extern u_int32_t tcp_autorcvbuf_inc_shift;
struct protosw;
struct domain;
unsigned int ifscope;
unsigned int nocell:1,
noexpensive:1,
- awdl_unrestricted:1;
+ awdl_unrestricted:1,
+ intcoproc_allowed:1;
};
void tcp_canceltimers(struct tcpcb *);
extern void tcp_get_ports_used(u_int32_t, int, u_int32_t, bitstr_t *);
uint32_t tcp_count_opportunistic(unsigned int ifindex, u_int32_t flags);
uint32_t tcp_find_anypcb_byaddr(struct ifaddr *ifa);
-void tcp_set_max_rwinscale(struct tcpcb *tp, struct socket *so);
+void tcp_set_max_rwinscale(struct tcpcb *tp, struct socket *so,
+ u_int32_t maxrcvbuf);
struct bwmeas* tcp_bwmeas_alloc(struct tcpcb *tp);
void tcp_bwmeas_free(struct tcpcb *tp);
extern int32_t timer_diff(uint32_t t1, uint32_t toff1, uint32_t t2, uint32_t toff2);
extern void tcp_clear_recv_bg(struct socket *);
extern boolean_t tcp_sack_byte_islost(struct tcpcb *tp);
#define IS_TCP_RECV_BG(_so) \
- ((_so)->so_traffic_mgt_flags & TRAFFIC_MGT_TCP_RECVBG)
+ ((_so)->so_flags1 & SOF1_TRAFFIC_MGT_TCP_RECVBG)
#if TRAFFIC_MGT
#define CLEAR_IAJ_STATE(_tp_) (_tp_)->iaj_rcv_ts = 0
void * tcp_getlock (struct socket *, int);
#endif
-
extern struct pr_usrreqs tcp_usrreqs;
extern u_int32_t tcp_sendspace;
extern u_int32_t tcp_recvspace;
extern void tcp_get_connectivity_status(struct tcpcb *,
struct tcp_conn_status *);
+extern void tcp_fill_keepalive_offload_frames(struct ifnet *,
+ struct ifnet_keepalive_offload_frame *, u_int32_t, size_t, u_int32_t *);
+
extern boolean_t tfo_enabled(const struct tcpcb *tp);
extern void tcp_disable_tfo(struct tcpcb *tp);
extern void tcp_tfo_gen_cookie(struct inpcb *inp, u_char *out, size_t blk_size);
#define TCP_FASTOPEN_KEYLEN 16
+extern errno_t tcp_notify_ack_id_valid(struct tcpcb *, struct socket *, u_int32_t);
+extern errno_t tcp_add_notify_ack_marker(struct tcpcb *, u_int32_t);
+extern void tcp_notify_ack_free(struct tcpcb *);
+extern void tcp_notify_acknowledgement(struct tcpcb *, struct socket *);
+extern void tcp_get_notify_ack_count(struct tcpcb *,
+ struct tcp_notify_ack_complete *);
+extern void tcp_get_notify_ack_ids(struct tcpcb *tp,
+ struct tcp_notify_ack_complete *);
+extern void tcp_update_mss_locked(struct socket *, struct ifnet *);
+
+extern int get_tcp_inp_list(struct inpcb **, int, inp_gen_t);
+extern bool tcp_notify_ack_active(struct socket *so);
#if MPTCP
extern int mptcp_input_preproc(struct tcpcb *, struct mbuf *, int);
-extern void mptcp_output_csum(struct tcpcb *, struct mbuf *, int32_t, unsigned,
+extern void mptcp_output_csum(struct tcpcb *, struct mbuf *, int32_t, unsigned,
u_int64_t, u_int32_t *);
extern int mptcp_adj_mss(struct tcpcb *, boolean_t);
extern void mptcp_insert_rmap(struct tcpcb *, struct mbuf *);
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