/* * Copyright (c) 2000-2022 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 * compliance with the License. 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All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)tcp_var.h 8.4 (Berkeley) 5/24/95 * $FreeBSD: src/sys/netinet/tcp_var.h,v 1.56.2.8 2001/08/22 00:59:13 silby Exp $ */ #ifndef _NETINET_TCP_VAR_H_ #define _NETINET_TCP_VAR_H_ #include #include #include #include #include #include #include #if defined(__LP64__) #define _TCPCB_PTR(x) u_int32_t #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) #endif struct tseg_qent; _TCPCB_LIST_HEAD(tsegqe_head, tseg_qent); struct tcpcb { struct tsegqe_head t_segq; int t_dupacks; /* consecutive dup acks recd */ u_int32_t unused; /* unused now: was t_template */ int t_timer[TCPT_NTIMERS_EXT]; /* tcp timers */ _TCPCB_PTR(struct inpcb *) t_inpcb; /* back pointer to internet pcb */ int t_state; /* state of this connection */ u_int t_flags; #define TF_ACKNOW 0x00001 /* ack peer immediately */ #define TF_DELACK 0x00002 /* ack, but try to delay it */ #define TF_NODELAY 0x00004 /* don't delay packets to coalesce */ #define TF_NOOPT 0x00008 /* don't use tcp options */ #define TF_SENTFIN 0x00010 /* have sent FIN */ #define TF_REQ_SCALE 0x00020 /* have/will request window scaling */ #define TF_RCVD_SCALE 0x00040 /* other side has requested scaling */ #define TF_REQ_TSTMP 0x00080 /* have/will request timestamps */ #define TF_RCVD_TSTMP 0x00100 /* a timestamp was received in SYN */ #define TF_SACK_PERMIT 0x00200 /* other side said I could SACK */ #define TF_NEEDSYN 0x00400 /* send SYN (implicit state) - unused but needed for backwards compatibility */ #define TF_NEEDFIN 0x00800 /* send FIN (implicit state) */ #define TF_NOPUSH 0x01000 /* don't push */ #define TF_REQ_CC 0x02000 /* have/will request CC */ #define TF_RCVD_CC 0x04000 /* a CC was received in SYN */ #define TF_SENDCCNEW 0x08000 /* Not implemented */ #define TF_MORETOCOME 0x10000 /* More data to be appended to sock */ #define TF_LQ_OVERFLOW 0x20000 /* listen queue overflow */ #define TF_RXWIN0SENT 0x40000 /* sent a receiver win 0 in response */ #define TF_SLOWLINK 0x80000 /* route is a on a modem speed link */ 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 */ 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 */ 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 */ char t_iobc; /* input character */ #define TCPOOB_HAVEDATA 0x01 #define TCPOOB_HADDATA 0x02 /* RFC 1323 variables */ u_char snd_scale; /* window scaling for send window */ u_char rcv_scale; /* window scaling for recv window */ 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 */ tcp_cc cc_send; /* send connection count */ tcp_cc cc_recv; /* receive connection count */ tcp_seq snd_recover; /* for use in fast recovery */ /* experimental */ u_int32_t snd_cwnd_prev; /* cwnd prior to retransmit */ u_int32_t snd_ssthresh_prev; /* ssthresh prior to retransmit */ u_int32_t t_badrxtwin; /* window for retransmit recovery */ }; #define tcps_ecn_setup tcps_ecn_client_success #define tcps_sent_cwr tcps_ecn_recv_ece #define tcps_sent_ece tcps_ecn_sent_ece /* * TCP statistics. * Many of these should be kept per connection, * but that's inconvenient at the moment. */ struct tcpstat { u_int32_t tcps_connattempt; /* connections initiated */ u_int32_t tcps_accepts; /* connections accepted */ u_int32_t tcps_connects; /* connections established */ u_int32_t tcps_drops; /* connections dropped */ u_int32_t tcps_conndrops; /* embryonic connections dropped */ u_int32_t tcps_closed; /* conn. closed (includes drops) */ u_int32_t tcps_segstimed; /* segs where we tried to get rtt */ u_int32_t tcps_rttupdated; /* times we succeeded */ u_int32_t tcps_delack; /* delayed acks sent */ u_int32_t tcps_timeoutdrop; /* conn. dropped in rxmt timeout */ u_int32_t tcps_rexmttimeo; /* retransmit timeouts */ u_int32_t tcps_persisttimeo; /* persist timeouts */ u_int32_t tcps_keeptimeo; /* keepalive timeouts */ u_int32_t tcps_keepprobe; /* keepalive probes sent */ u_int32_t tcps_keepdrops; /* connections dropped in keepalive */ u_int32_t tcps_sndtotal; /* total packets sent */ u_int32_t tcps_sndpack; /* data packets sent */ u_int32_t tcps_sndbyte; /* data bytes sent */ u_int32_t tcps_sndrexmitpack; /* data packets retransmitted */ u_int32_t tcps_sndrexmitbyte; /* data bytes retransmitted */ u_int32_t tcps_sndacks; /* ack-only packets sent */ u_int32_t tcps_sndprobe; /* window probes sent */ u_int32_t tcps_sndurg; /* packets sent with URG only */ u_int32_t tcps_sndwinup; /* window update-only packets sent */ u_int32_t tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */ u_int32_t tcps_rcvtotal; /* total packets received */ u_int32_t tcps_rcvpack; /* packets received in sequence */ u_int32_t tcps_rcvbyte; /* bytes received in sequence */ u_int32_t tcps_rcvbadsum; /* packets received with ccksum errs */ u_int32_t tcps_rcvbadoff; /* packets received with bad offset */ u_int32_t tcps_rcvmemdrop; /* packets dropped for lack of memory */ u_int32_t tcps_rcvshort; /* packets received too short */ u_int32_t tcps_rcvduppack; /* duplicate-only packets received */ u_int32_t tcps_rcvdupbyte; /* duplicate-only bytes received */ u_int32_t tcps_rcvpartduppack; /* packets with some duplicate data */ u_int32_t tcps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */ u_int32_t tcps_rcvoopack; /* out-of-order packets received */ u_int32_t tcps_rcvoobyte; /* out-of-order bytes received */ u_int32_t tcps_rcvpackafterwin; /* packets with data after window */ u_int32_t tcps_rcvbyteafterwin; /* bytes rcvd after window */ u_int32_t tcps_rcvafterclose; /* packets rcvd after "close" */ u_int32_t tcps_rcvwinprobe; /* rcvd window probe packets */ u_int32_t tcps_rcvdupack; /* rcvd duplicate acks */ u_int32_t tcps_rcvacktoomuch; /* rcvd acks for unsent data */ u_int32_t tcps_rcvackpack; /* rcvd ack packets */ u_int32_t tcps_rcvackbyte; /* bytes acked by rcvd acks */ u_int32_t tcps_rcvwinupd; /* rcvd window update packets */ u_int32_t tcps_pawsdrop; /* segments dropped due to PAWS */ u_int32_t tcps_predack; /* times hdr predict ok for acks */ u_int32_t tcps_preddat; /* times hdr predict ok for data pkts */ u_int32_t tcps_pcbcachemiss; u_int32_t tcps_cachedrtt; /* times cached RTT in route updated */ u_int32_t tcps_cachedrttvar; /* times cached rttvar updated */ u_int32_t tcps_cachedssthresh; /* times cached ssthresh updated */ u_int32_t tcps_usedrtt; /* times RTT initialized from route */ u_int32_t tcps_usedrttvar; /* times RTTVAR initialized from rt */ u_int32_t tcps_usedssthresh; /* times ssthresh initialized from rt*/ u_int32_t tcps_persistdrop; /* timeout in persist state */ u_int32_t tcps_badsyn; /* bogus SYN, e.g. premature ACK */ u_int32_t tcps_mturesent; /* resends due to MTU discovery */ u_int32_t tcps_listendrop; /* listen queue overflows */ u_int32_t tcps_synchallenge; /* challenge ACK due to bad SYN */ u_int32_t tcps_rstchallenge; /* challenge ACK due to bad RST */ /* new stats from FreeBSD 5.4 sync up */ u_int32_t tcps_minmssdrops; /* average minmss too low drops */ u_int32_t tcps_sndrexmitbad; /* unnecessary packet retransmissions */ u_int32_t tcps_badrst; /* ignored RSTs in the window */ u_int32_t tcps_sc_added; /* entry added to syncache */ u_int32_t tcps_sc_retransmitted; /* syncache entry was retransmitted */ u_int32_t tcps_sc_dupsyn; /* duplicate SYN packet */ u_int32_t tcps_sc_dropped; /* could not reply to packet */ u_int32_t tcps_sc_completed; /* successful extraction of entry */ u_int32_t tcps_sc_bucketoverflow; /* syncache per-bucket limit hit */ u_int32_t tcps_sc_cacheoverflow; /* syncache cache limit hit */ u_int32_t tcps_sc_reset; /* RST removed entry from syncache */ u_int32_t tcps_sc_stale; /* timed out or listen socket gone */ u_int32_t tcps_sc_aborted; /* syncache entry aborted */ u_int32_t tcps_sc_badack; /* removed due to bad ACK */ u_int32_t tcps_sc_unreach; /* ICMP unreachable received */ u_int32_t tcps_sc_zonefail; /* zalloc() failed */ u_int32_t tcps_sc_sendcookie; /* SYN cookie sent */ u_int32_t tcps_sc_recvcookie; /* SYN cookie received */ u_int32_t tcps_hc_added; /* entry added to hostcache */ u_int32_t tcps_hc_bucketoverflow; /* hostcache per bucket limit hit */ /* SACK related stats */ u_int32_t tcps_sack_recovery_episode; /* SACK recovery episodes */ u_int32_t tcps_sack_rexmits; /* SACK rexmit segments */ u_int32_t tcps_sack_rexmit_bytes; /* SACK rexmit bytes */ u_int32_t tcps_sack_rcv_blocks; /* SACK blocks (options) received */ u_int32_t tcps_sack_send_blocks; /* SACK blocks (options) sent */ u_int32_t tcps_sack_sboverflow; /* SACK sendblock overflow */ u_int32_t tcps_bg_rcvtotal; /* total background packets received */ u_int32_t tcps_rxtfindrop; /* drop conn after retransmitting FIN */ u_int32_t tcps_fcholdpacket; /* packets withheld because of flow control */ u_int32_t tcps_limited_txt; /* Limited transmit used */ u_int32_t tcps_early_rexmt; /* Early retransmit used */ u_int32_t tcps_sack_ackadv; /* Cumulative ack advanced along with sack */ /* Checksum related stats */ u_int32_t tcps_rcv_swcsum; /* tcp swcksum (inbound), packets */ u_int32_t tcps_rcv_swcsum_bytes; /* tcp swcksum (inbound), bytes */ u_int32_t tcps_rcv6_swcsum; /* tcp6 swcksum (inbound), packets */ u_int32_t tcps_rcv6_swcsum_bytes; /* tcp6 swcksum (inbound), bytes */ u_int32_t tcps_snd_swcsum; /* tcp swcksum (outbound), packets */ u_int32_t tcps_snd_swcsum_bytes; /* tcp swcksum (outbound), bytes */ u_int32_t tcps_snd6_swcsum; /* tcp6 swcksum (outbound), packets */ u_int32_t tcps_snd6_swcsum_bytes; /* tcp6 swcksum (outbound), bytes */ u_int32_t tcps_unused_1; u_int32_t tcps_unused_2; u_int32_t tcps_unused_3; /* MPTCP Related stats */ u_int32_t tcps_invalid_mpcap; /* Invalid MPTCP capable opts */ u_int32_t tcps_invalid_joins; /* Invalid MPTCP joins */ u_int32_t tcps_mpcap_fallback; /* TCP fallback in primary */ u_int32_t tcps_join_fallback; /* No MPTCP in secondary */ u_int32_t tcps_estab_fallback; /* DSS option dropped */ u_int32_t tcps_invalid_opt; /* Catchall error stat */ u_int32_t tcps_mp_outofwin; /* Packet lies outside the * shared recv window */ u_int32_t tcps_mp_reducedwin; /* Reduced subflow window */ u_int32_t tcps_mp_badcsum; /* Bad DSS csum */ u_int32_t tcps_mp_oodata; /* Out of order data */ u_int32_t tcps_mp_switches; /* number of subflow switch */ u_int32_t tcps_mp_rcvtotal; /* number of rcvd packets */ u_int32_t tcps_mp_rcvbytes; /* number of bytes received */ u_int32_t tcps_mp_sndpacks; /* number of data packs sent */ u_int32_t tcps_mp_sndbytes; /* number of bytes sent */ u_int32_t tcps_join_rxmts; /* join ack retransmits */ u_int32_t tcps_tailloss_rto; /* RTO due to tail loss */ u_int32_t tcps_reordered_pkts; /* packets reorderd */ u_int32_t tcps_recovered_pkts; /* recovered after loss */ u_int32_t tcps_pto; /* probe timeout */ u_int32_t tcps_rto_after_pto; /* RTO after a probe */ u_int32_t tcps_tlp_recovery; /* TLP induced fast recovery */ u_int32_t tcps_tlp_recoverlastpkt; /* TLP recoverd last pkt */ u_int32_t tcps_ecn_client_success; /* client-side connection negotiated ECN */ u_int32_t tcps_ecn_recv_ece; /* ECE received, sent CWR */ u_int32_t tcps_ecn_sent_ece; /* Sent ECE notification */ u_int32_t tcps_detect_reordering; /* Detect pkt reordering */ u_int32_t tcps_delay_recovery; /* Delay fast recovery */ u_int32_t tcps_avoid_rxmt; /* Retransmission was avoided */ u_int32_t tcps_unnecessary_rxmt; /* Retransmission was not needed */ u_int32_t tcps_nostretchack; /* disabled stretch ack algorithm on a connection */ u_int32_t tcps_rescue_rxmt; /* SACK rescue retransmit */ u_int32_t tcps_pto_in_recovery; /* rescue retransmit in fast recovery */ u_int32_t tcps_pmtudbh_reverted; /* PMTU Blackhole detection, segment size reverted */ /* DSACK related statistics */ u_int32_t tcps_dsack_disable; /* DSACK disabled due to n/w duplication */ u_int32_t tcps_dsack_ackloss; /* ignore DSACK due to ack loss */ u_int32_t tcps_dsack_badrexmt; /* DSACK based bad rexmt recovery */ u_int32_t tcps_dsack_sent; /* Sent DSACK notification */ u_int32_t tcps_dsack_recvd; /* Received a valid DSACK option */ u_int32_t tcps_dsack_recvd_old; /* Received an out of window DSACK option */ /* MPTCP Subflow selection stats */ u_int32_t tcps_mp_sel_symtomsd; /* By symptomsd */ u_int32_t tcps_mp_sel_rtt; /* By RTT comparison */ u_int32_t tcps_mp_sel_rto; /* By RTO comparison */ u_int32_t tcps_mp_sel_peer; /* By peer's output pattern */ u_int32_t tcps_mp_num_probes; /* Number of probes sent */ u_int32_t tcps_mp_verdowngrade; /* MPTCP version downgrade */ u_int32_t tcps_drop_after_sleep; /* drop after long AP sleep */ u_int32_t tcps_probe_if; /* probe packets after interface availability */ u_int32_t tcps_probe_if_conflict; /* Can't send probe packets for interface */ u_int32_t tcps_ecn_client_setup; /* Attempted ECN setup from client side */ u_int32_t tcps_ecn_server_setup; /* Attempted ECN setup from server side */ u_int32_t tcps_ecn_server_success; /* server-side connection negotiated ECN */ u_int32_t tcps_ecn_ace_syn_not_ect; /* received AccECN SYN packet with Not-ECT */ u_int32_t tcps_ecn_ace_syn_ect1; /* received AccECN SYN packet with ECT1 */ u_int32_t tcps_ecn_ace_syn_ect0; /* received AccECN SYN packet with ECT0 */ u_int32_t tcps_ecn_ace_syn_ce; /* received AccECN SYN packet with CE */ u_int32_t tcps_ecn_lost_synack; /* Lost SYN-ACK with ECN setup */ u_int32_t tcps_ecn_lost_syn; /* Lost SYN with ECN setup */ u_int32_t tcps_ecn_not_supported; /* Server did not support ECN setup */ u_int32_t tcps_ecn_recv_ce; /* Received CE from the network */ u_int32_t tcps_ecn_ace_recv_ce; /* CE count received in ACE field */ u_int32_t tcps_ecn_conn_recv_ce; /* Number of connections received CE atleast once */ u_int32_t tcps_ecn_conn_recv_ece; /* Number of connections received ECE atleast once */ u_int32_t tcps_ecn_conn_plnoce; /* Number of connections that received no CE and sufferred packet loss */ u_int32_t tcps_ecn_conn_pl_ce; /* Number of connections that received CE and sufferred packet loss */ u_int32_t tcps_ecn_conn_nopl_ce; /* Number of connections that received CE and sufferred no packet loss */ u_int32_t tcps_ecn_fallback_synloss; /* Number of times we did fall back due to SYN-Loss */ u_int32_t tcps_ecn_fallback_reorder; /* Number of times we fallback because we detected the PAWS-issue */ u_int32_t tcps_ecn_fallback_ce; /* Number of times we fallback because we received too many CEs */ /* TFO-related statistics */ u_int32_t tcps_tfo_syn_data_rcv; /* Received a SYN+data with valid cookie */ u_int32_t tcps_tfo_cookie_req_rcv;/* Received a TFO cookie-request */ u_int32_t tcps_tfo_cookie_sent; /* Offered a TFO-cookie to the client */ u_int32_t tcps_tfo_cookie_invalid;/* Received an invalid TFO-cookie */ u_int32_t tcps_tfo_cookie_req; /* Cookie requested with the SYN */ u_int32_t tcps_tfo_cookie_rcv; /* Cookie received in a SYN/ACK */ u_int32_t tcps_tfo_syn_data_sent; /* SYN+data+cookie sent */ 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_int32_t tcps_ecn_fallback_synrst; /* ECN fallback due to rst after syn */ u_int32_t tcps_mptcp_rcvmemdrop; /* MPTCP packets dropped for lack of memory */ u_int32_t tcps_mptcp_rcvduppack; /* MPTCP duplicate-only packets received */ u_int32_t tcps_mptcp_rcvpackafterwin; /* MPTCP packets with data after window */ /* TCP timer statistics */ u_int32_t tcps_timer_drift_le_1_ms; /* Timer drift less or equal to 1 ms */ u_int32_t tcps_timer_drift_le_10_ms; /* Timer drift less or equal to 10 ms */ u_int32_t tcps_timer_drift_le_20_ms; /* Timer drift less or equal to 20 ms */ u_int32_t tcps_timer_drift_le_50_ms; /* Timer drift less or equal to 50 ms */ u_int32_t tcps_timer_drift_le_100_ms; /* Timer drift less or equal to 100 ms */ u_int32_t tcps_timer_drift_le_200_ms; /* Timer drift less or equal to 200 ms */ u_int32_t tcps_timer_drift_le_500_ms; /* Timer drift less or equal to 500 ms */ u_int32_t tcps_timer_drift_le_1000_ms; /* Timer drift less or equal to 1000 ms */ u_int32_t tcps_timer_drift_gt_1000_ms; /* Timer drift greater than 1000 ms */ u_int32_t tcps_mptcp_handover_attempt; /* Total number of MPTCP-attempts using handover mode */ u_int32_t tcps_mptcp_interactive_attempt; /* Total number of MPTCP-attempts using interactive mode */ u_int32_t tcps_mptcp_aggregate_attempt; /* Total number of MPTCP-attempts using aggregate mode */ u_int32_t tcps_mptcp_fp_handover_attempt; /* Same as previous three but only for first-party apps */ u_int32_t tcps_mptcp_fp_interactive_attempt; u_int32_t tcps_mptcp_fp_aggregate_attempt; u_int32_t tcps_mptcp_heuristic_fallback; /* Total number of MPTCP-connections that fell back due to heuristics */ u_int32_t tcps_mptcp_fp_heuristic_fallback; /* Same as previous but for first-party apps */ u_int32_t tcps_mptcp_handover_success_wifi; /* Total number of successfull handover-mode connections that *started* on WiFi */ u_int32_t tcps_mptcp_handover_success_cell; /* Total number of successfull handover-mode connections that *started* on Cell */ u_int32_t tcps_mptcp_interactive_success; /* Total number of interactive-mode connections that negotiated MPTCP */ u_int32_t tcps_mptcp_aggregate_success; /* Same as previous but for aggregate */ u_int32_t tcps_mptcp_fp_handover_success_wifi; /* Same as previous four, but for first-party apps */ u_int32_t tcps_mptcp_fp_handover_success_cell; u_int32_t tcps_mptcp_fp_interactive_success; u_int32_t tcps_mptcp_fp_aggregate_success; u_int32_t tcps_mptcp_handover_cell_from_wifi; /* Total number of connections that use cell in handover-mode (coming from WiFi) */ u_int32_t tcps_mptcp_handover_wifi_from_cell; /* Total number of connections that use WiFi in handover-mode (coming from cell) */ u_int32_t tcps_mptcp_interactive_cell_from_wifi; /* Total number of connections that use cell in interactive mode (coming from WiFi) */ u_int64_t tcps_mptcp_handover_cell_bytes; /* Total number of bytes sent on cell in handover-mode (on new subflows, ignoring initial one) */ u_int64_t tcps_mptcp_interactive_cell_bytes; /* Same as previous but for interactive */ u_int64_t tcps_mptcp_aggregate_cell_bytes; u_int64_t tcps_mptcp_handover_all_bytes; /* Total number of bytes sent in handover */ u_int64_t tcps_mptcp_interactive_all_bytes; u_int64_t tcps_mptcp_aggregate_all_bytes; u_int32_t tcps_mptcp_back_to_wifi; /* Total number of connections that succeed to move traffic away from cell (when starting on cell) */ u_int32_t tcps_mptcp_wifi_proxy; /* Total number of new subflows that fell back to regular TCP on cell */ u_int32_t tcps_mptcp_cell_proxy; /* Total number of new subflows that fell back to regular TCP on WiFi */ /* TCP offload statistics */ u_int32_t tcps_ka_offload_drops; /* Keep alive drops for timeout reported by firmware */ u_int32_t tcps_mptcp_triggered_cell; /* Total number of times an MPTCP-connection triggered cell bringup */ u_int32_t tcps_fin_timeout_drops; }; struct tcpstat_local { u_int64_t badformat; u_int64_t unspecv6; u_int64_t synfin; u_int64_t badformatipsec; u_int64_t noconnnolist; u_int64_t noconnlist; u_int64_t listbadsyn; u_int64_t icmp6unreach; u_int64_t deprecate6; u_int64_t ooopacket; u_int64_t rstinsynrcv; u_int64_t dospacket; u_int64_t cleanup; u_int64_t synwindow; }; #pragma pack(4) /* * TCB structure exported to user-land via sysctl(3). * Evil hack: declare only if in_pcb.h and sys/socketvar.h have been * included. Not all of our clients do. */ struct xtcpcb { u_int32_t xt_len; struct inpcb xt_inp; struct tcpcb xt_tp; struct xsocket xt_socket; u_quad_t xt_alignment_hack; }; #if XNU_TARGET_OS_OSX || KERNEL || !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) struct xtcpcb64 { u_int32_t xt_len; struct xinpcb64 xt_inpcb; 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 */ 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 */ 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 */ char t_iobc; /* input character */ /* RFC 1323 variables */ u_char snd_scale; /* window scaling for send window */ u_char rcv_scale; /* window scaling for recv window */ 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 */ tcp_cc cc_send; /* send connection count */ tcp_cc cc_recv; /* receive connection count */ tcp_seq snd_recover; /* for use in fast recovery */ /* experimental */ u_int32_t snd_cwnd_prev; /* cwnd prior to retransmit */ u_int32_t snd_ssthresh_prev; /* ssthresh prior to retransmit */ u_int32_t t_badrxtwin; /* window for retransmit recovery */ u_quad_t xt_alignment_hack; }; #endif /* XNU_TARGET_OS_OSX || KERNEL || !(TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR) */ #pragma pack() /* * Names for TCP sysctl objects */ #define TCPCTL_DO_RFC1323 1 /* use RFC-1323 extensions */ #define TCPCTL_DO_RFC1644 2 /* use RFC-1644 extensions */ #define TCPCTL_MSSDFLT 3 /* MSS default */ #define TCPCTL_STATS 4 /* statistics (read-only) */ #define TCPCTL_RTTDFLT 5 /* default RTT estimate */ #define TCPCTL_KEEPIDLE 6 /* keepalive idle timer */ #define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */ #define TCPCTL_SENDSPACE 8 /* send buffer space */ #define TCPCTL_RECVSPACE 9 /* receive buffer space */ #define TCPCTL_KEEPINIT 10 /* timeout for establishing syn */ #define TCPCTL_PCBLIST 11 /* list of all outstanding PCBs */ #define TCPCTL_DELACKTIME 12 /* time before sending delayed ACK */ #define TCPCTL_V6MSSDFLT 13 /* MSS default for IPv6 */ #define TCPCTL_MAXID 14 #endif /* _NETINET_TCP_VAR_H_ */