/*
- * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2019 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@
*/
/*
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
+#include <netinet/in_tclass.h>
#include <netinet/ip.h>
#include <netinet/in_pcb.h>
#include <netinet/ip_var.h>
#if TCPDEBUG
#include <netinet/tcp_debug.h>
#endif
+#include <netinet/tcp_log.h>
#include <sys/kdebug.h>
#include <mach/sdt.h>
#define DBG_LAYER_END NETDBG_CODE(DBG_NETTCP, 3)
#define DBG_FNC_TCP_OUTPUT NETDBG_CODE(DBG_NETTCP, (4 << 8) | 1)
-int path_mtu_discovery = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, path_mtu_discovery,
- CTLFLAG_RW | CTLFLAG_LOCKED, &path_mtu_discovery, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, path_mtu_discovery,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, path_mtu_discovery, 1,
"Enable Path MTU Discovery");
-int ss_fltsz = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, slowstart_flightsize,
- CTLFLAG_RW | CTLFLAG_LOCKED,&ss_fltsz, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, slowstart_flightsize,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, ss_fltsz, 1,
"Slow start flight size");
-int ss_fltsz_local = 8; /* starts with eight segments max */
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, local_slowstart_flightsize,
- CTLFLAG_RW | CTLFLAG_LOCKED, &ss_fltsz_local, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, local_slowstart_flightsize,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, ss_fltsz_local, 8,
"Slow start flight size for local networks");
int tcp_do_tso = 1;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, tso, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_do_tso, 0, "Enable TCP Segmentation Offload");
+ &tcp_do_tso, 0, "Enable TCP Segmentation Offload");
+
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, ecn_setup_percentage,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, tcp_ecn_setup_percentage, 100,
+ "Max ECN setup percentage");
+
+static int
+sysctl_change_ecn_setting SYSCTL_HANDLER_ARGS
+{
+#pragma unused(oidp, arg1, arg2)
+ int i, err = 0, changed = 0;
+ struct ifnet *ifp;
+
+ err = sysctl_io_number(req, tcp_ecn_outbound, sizeof(int32_t),
+ &i, &changed);
+ if (err != 0 || req->newptr == USER_ADDR_NULL)
+ return err;
+
+ if (changed) {
+ if ((tcp_ecn_outbound == 0 || tcp_ecn_outbound == 1) &&
+ (i == 0 || i == 1)) {
+ tcp_ecn_outbound = i;
+ SYSCTL_SKMEM_UPDATE_FIELD(tcp.ecn_initiate_out, tcp_ecn_outbound);
+ return err;
+ }
+ if (tcp_ecn_outbound == 2 && (i == 0 || i == 1)) {
+ /*
+ * Reset ECN enable flags on non-cellular
+ * interfaces so that the system default will take
+ * over
+ */
+ ifnet_head_lock_shared();
+ TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
+ if (!IFNET_IS_CELLULAR(ifp)) {
+ ifnet_lock_exclusive(ifp);
+ ifp->if_eflags &= ~IFEF_ECN_DISABLE;
+ ifp->if_eflags &= ~IFEF_ECN_ENABLE;
+ ifnet_lock_done(ifp);
+ }
+ }
+ ifnet_head_done();
+ } else {
+ /*
+ * Set ECN enable flags on non-cellular
+ * interfaces
+ */
+ ifnet_head_lock_shared();
+ TAILQ_FOREACH(ifp, &ifnet_head, if_link) {
+ if (!IFNET_IS_CELLULAR(ifp)) {
+ ifnet_lock_exclusive(ifp);
+ ifp->if_eflags |= IFEF_ECN_ENABLE;
+ ifp->if_eflags &= ~IFEF_ECN_DISABLE;
+ ifnet_lock_done(ifp);
+ }
+ }
+ ifnet_head_done();
+ }
+ tcp_ecn_outbound = i;
+ SYSCTL_SKMEM_UPDATE_FIELD(tcp.ecn_initiate_out, tcp_ecn_outbound);
+ }
+ /* Change the other one too as the work is done */
+ if (i == 2 || tcp_ecn_inbound == 2) {
+ tcp_ecn_inbound = i;
+ SYSCTL_SKMEM_UPDATE_FIELD(tcp.ecn_negotiate_in, tcp_ecn_inbound);
+ }
+ return err;
+}
-int tcp_ecn_outbound = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, ecn_initiate_out,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_ecn_outbound, 0,
- "Initiate ECN for outbound connections");
+int tcp_ecn_outbound = 2;
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, ecn_initiate_out,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_ecn_outbound, 0,
+ sysctl_change_ecn_setting, "IU",
+ "Initiate ECN for outbound connections");
-int tcp_ecn_inbound = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, ecn_negotiate_in,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_ecn_inbound, 0,
- "Allow ECN negotiation for inbound connections");
+int tcp_ecn_inbound = 2;
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, ecn_negotiate_in,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_ecn_inbound, 0,
+ sysctl_change_ecn_setting, "IU",
+ "Initiate ECN for inbound connections");
-int tcp_packet_chaining = 50;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, packetchain,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_packet_chaining, 0,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, packetchain,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, tcp_packet_chaining, 50,
"Enable TCP output packet chaining");
-int tcp_output_unlocked = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, socket_unlocked_on_output,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_output_unlocked, 0,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, socket_unlocked_on_output,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, tcp_output_unlocked, 1,
"Unlock TCP when sending packets down to IP");
-int tcp_do_rfc3390 = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, rfc3390,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_do_rfc3390, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, rfc3390,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, tcp_do_rfc3390, 1,
"Calculate intial slowstart cwnd depending on MSS");
-int tcp_min_iaj_win = MIN_IAJ_WIN;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, min_iaj_win,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_min_iaj_win, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, min_iaj_win,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, tcp_min_iaj_win, MIN_IAJ_WIN,
"Minimum recv win based on inter-packet arrival jitter");
-int tcp_acc_iaj_react_limit = ACC_IAJ_REACT_LIMIT;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, acc_iaj_react_limit,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_acc_iaj_react_limit, 1,
- "Accumulated IAJ when receiver starts to react");
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, acc_iaj_react_limit,
+ CTLFLAG_RW | CTLFLAG_LOCKED, int, tcp_acc_iaj_react_limit,
+ ACC_IAJ_REACT_LIMIT, "Accumulated IAJ when receiver starts to react");
-uint32_t tcp_do_autosendbuf = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, doautosndbuf,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_do_autosendbuf, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, doautosndbuf,
+ CTLFLAG_RW | CTLFLAG_LOCKED, uint32_t, tcp_do_autosendbuf, 1,
"Enable send socket buffer auto-tuning");
-uint32_t tcp_autosndbuf_inc = 8 * 1024;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, autosndbufinc,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_autosndbuf_inc, 1,
- "Increment in send socket bufffer size");
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, autosndbufinc,
+ CTLFLAG_RW | CTLFLAG_LOCKED, uint32_t, tcp_autosndbuf_inc,
+ 8 * 1024, "Increment in send socket bufffer size");
-uint32_t tcp_autosndbuf_max = 512 * 1024;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, autosndbufmax,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_autosndbuf_max, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, autosndbufmax,
+ CTLFLAG_RW | CTLFLAG_LOCKED, uint32_t, tcp_autosndbuf_max, 512 * 1024,
"Maximum send socket buffer size");
-uint32_t tcp_prioritize_acks = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, ack_prioritize,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_prioritize_acks, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, ack_prioritize,
+ CTLFLAG_RW | CTLFLAG_LOCKED, uint32_t, tcp_prioritize_acks, 1,
"Prioritize pure acks");
-uint32_t tcp_use_rtt_recvbg = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, rtt_recvbg,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_use_rtt_recvbg, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, rtt_recvbg,
+ CTLFLAG_RW | CTLFLAG_LOCKED, uint32_t, tcp_use_rtt_recvbg, 1,
"Use RTT for bg recv algorithm");
-uint32_t tcp_recv_throttle_minwin = 16 * 1024;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, recv_throttle_minwin,
- CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_recv_throttle_minwin, 1,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, recv_throttle_minwin,
+ CTLFLAG_RW | CTLFLAG_LOCKED, uint32_t, tcp_recv_throttle_minwin, 16 * 1024,
"Minimum recv win for throttling");
-int32_t tcp_enable_tlp = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, enable_tlp,
+SYSCTL_SKMEM_TCP_INT(OID_AUTO, enable_tlp,
CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_enable_tlp, 1, "Enable Tail loss probe");
+ int32_t, tcp_enable_tlp, 1, "Enable Tail loss probe");
static int32_t packchain_newlist = 0;
static int32_t packchain_looped = 0;
extern int slowlink_wsize; /* window correction for slow links */
#if IPFIREWALL
-extern int fw_enable; /* firewall check for packet chaining */
-extern int fw_bypass; /* firewall check: disable packet chaining if there is rules */
+extern int fw_enable; /* firewall check for packet chaining */
+extern int fw_bypass; /* firewall check: disable packet chaining if there is rules */
#endif /* IPFIREWALL */
extern u_int32_t dlil_filter_disable_tso_count;
extern u_int32_t kipf_count;
-extern int tcp_recv_bg;
-static int tcp_ip_output(struct socket *, struct tcpcb *, struct mbuf *, int,
- struct mbuf *, int, int, int32_t, boolean_t);
+static int tcp_ip_output(struct socket *, struct tcpcb *, struct mbuf *,
+ int, struct mbuf *, int, int, boolean_t);
static struct mbuf* tcp_send_lroacks(struct tcpcb *tp, struct mbuf *m, struct tcphdr *th);
static int tcp_recv_throttle(struct tcpcb *tp);
if (tp->t_flags & TF_NOOPT)
goto fallback;
- if (!tcp_heuristic_do_tfo(tp))
+ if (!(tp->t_flagsext & TF_FASTOPEN_FORCE_ENABLE) &&
+ !tcp_heuristic_do_tfo(tp)) {
+ tp->t_tfo_stats |= TFO_S_HEURISTICS_DISABLE;
+ tcpstat.tcps_tfo_heuristics_disable++;
goto fallback;
+ }
+
+ if (so->so_flags1 & SOF1_DATA_AUTHENTICATED)
+ return len;
optlen += TCPOLEN_MAXSEG;
#if MPTCP
if ((so->so_flags & SOF_MP_SUBFLOW) && mptcp_enable &&
- tp->t_rxtshift <= mptcp_mpcap_retries)
+ (tp->t_rxtshift <= mptcp_mpcap_retries ||
+ (tptomptp(tp)->mpt_mpte->mpte_flags & MPTE_FORCE_ENABLE)))
optlen += sizeof(struct mptcp_mpcapable_opt_common) + sizeof(mptcp_key_t);
#endif /* MPTCP */
cookie_len = tcp_cache_get_cookie_len(tp);
if (cookie_len == 0)
/* No cookie, so we request one */
- return (0);
+ return 0;
+
+ /* There is not enough space for the cookie, so we cannot do TFO */
+ if (MAX_TCPOPTLEN - optlen < cookie_len)
+ goto fallback;
/* Do not send SYN+data if there is more in the queue than MSS */
if (so->so_snd.sb_cc > (tp->t_maxopd - MAX_TCPOPTLEN))
goto fallback;
/* Ok, everything looks good. We can go on and do TFO */
- return (len);
+ return len;
fallback:
- tp->t_flagsext &= ~TF_FASTOPEN;
- return (0);
+ tcp_disable_tfo(tp);
+ return 0;
}
/* Returns the number of bytes written to the TCP option-space */
if ((MAX_TCPOPTLEN - optlen) <
(TCPOLEN_FASTOPEN_REQ + TFO_COOKIE_LEN_DEFAULT))
- return (ret);
+ return ret;
tcp_tfo_gen_cookie(tp->t_inpcb, out, sizeof(out));
tp->t_tfo_stats |= TFO_S_COOKIE_SENT;
tcpstat.tcps_tfo_cookie_sent++;
- return (ret);
+ return ret;
}
static unsigned
-tcp_tfo_write_cookie(struct tcpcb *tp, unsigned optlen, int32_t *len,
+tcp_tfo_write_cookie(struct tcpcb *tp, unsigned optlen, int32_t len,
u_char *opt)
{
u_int8_t tfo_len = MAX_TCPOPTLEN - optlen - TCPOLEN_FASTOPEN_REQ;
+ struct socket *so = tp->t_inpcb->inp_socket;
unsigned ret = 0;
int res;
u_char *bp;
+ if (so->so_flags1 & SOF1_DATA_AUTHENTICATED) {
+ /* If there is some data, let's track it */
+ if (len > 0) {
+ tp->t_tfo_stats |= TFO_S_SYN_DATA_SENT;
+ tcpstat.tcps_tfo_syn_data_sent++;
+ }
+
+ return 0;
+ }
+
bp = opt + optlen;
/*
tp->t_tfo_flags |= TFO_F_COOKIE_SENT;
/* If there is some data, let's track it */
- if (*len) {
+ if (len > 0) {
tp->t_tfo_stats |= TFO_S_SYN_DATA_SENT;
tcpstat.tcps_tfo_syn_data_sent++;
}
}
- return (ret);
+ return ret;
}
static inline bool
tcp_send_ecn_flags_on_syn(struct tcpcb *tp, struct socket *so)
{
- return(!((tp->ecn_flags & TE_SETUPSENT) ||
+ return !((tp->ecn_flags & TE_SETUPSENT ||
(so->so_flags & SOF_MP_SUBFLOW) ||
- (tp->t_flagsext & TF_FASTOPEN)));
+ (tfo_enabled(tp))));
+}
+
+void
+tcp_set_ecn(struct tcpcb *tp, struct ifnet *ifp)
+{
+ boolean_t inbound;
+
+ /*
+ * Socket option has precedence
+ */
+ if (tp->ecn_flags & TE_ECN_MODE_ENABLE) {
+ tp->ecn_flags |= TE_ENABLE_ECN;
+ goto check_heuristic;
+ }
+
+ if (tp->ecn_flags & TE_ECN_MODE_DISABLE) {
+ tp->ecn_flags &= ~TE_ENABLE_ECN;
+ return;
+ }
+ /*
+ * Per interface setting comes next
+ */
+ if (ifp != NULL) {
+ if (ifp->if_eflags & IFEF_ECN_ENABLE) {
+ tp->ecn_flags |= TE_ENABLE_ECN;
+ goto check_heuristic;
+ }
+
+ if (ifp->if_eflags & IFEF_ECN_DISABLE) {
+ tp->ecn_flags &= ~TE_ENABLE_ECN;
+ return;
+ }
+ }
+ /*
+ * System wide settings come last
+ */
+ inbound = (tp->t_inpcb->inp_socket->so_head != NULL);
+ if ((inbound && tcp_ecn_inbound == 1) ||
+ (!inbound && tcp_ecn_outbound == 1)) {
+ tp->ecn_flags |= TE_ENABLE_ECN;
+ goto check_heuristic;
+ } else {
+ tp->ecn_flags &= ~TE_ENABLE_ECN;
+ }
+
+ return;
+
+check_heuristic:
+ if (!tcp_heuristic_do_ecn(tp))
+ tp->ecn_flags &= ~TE_ENABLE_ECN;
+
+ /*
+ * If the interface setting, system-level setting and heuristics
+ * allow to enable ECN, randomly select 5% of connections to
+ * enable it
+ */
+ if ((tp->ecn_flags & (TE_ECN_MODE_ENABLE | TE_ECN_MODE_DISABLE
+ | TE_ENABLE_ECN)) == TE_ENABLE_ECN) {
+ /*
+ * Use the random value in iss for randomizing
+ * this selection
+ */
+ if ((tp->iss % 100) >= tcp_ecn_setup_percentage)
+ tp->ecn_flags &= ~TE_ENABLE_ECN;
+ }
}
/*
struct mbuf *tp_inp_options = inp->inp_depend4.inp4_options;
#if INET6
int isipv6 = inp->inp_vflag & INP_IPV6 ;
+#else
+ int isipv6 = 0;
#endif
short packchain_listadd = 0;
int so_options = so->so_options;
struct rtentry *rt;
- u_int32_t basertt, svc_flags = 0, allocated_len;
+ u_int32_t svc_flags = 0, allocated_len;
u_int32_t lro_ackmore = (tp->t_lropktlen != 0) ? 1 : 0;
struct mbuf *mnext = NULL;
int sackoptlen = 0;
#if MPTCP
- unsigned int *dlenp = NULL;
- u_int8_t *finp = NULL;
- u_int32_t *sseqp = NULL;
- u_int64_t dss_val = 0;
- boolean_t mptcp_acknow = FALSE;
- boolean_t early_data_sent = FALSE;
+ boolean_t mptcp_acknow;
#endif /* MPTCP */
boolean_t cell = FALSE;
boolean_t wifi = FALSE;
boolean_t wired = FALSE;
boolean_t sack_rescue_rxt = FALSE;
+ int sotc = so->so_traffic_class;
/*
* Determine length of data that should be transmitted,
idle = 0;
}
}
-#if MPTCP
+#if MPTCP
if (tp->t_mpflags & TMPF_RESET) {
tcp_check_timer_state(tp);
- /*
- * Once a RST has been sent for an MPTCP subflow,
+ /*
+ * Once a RST has been sent for an MPTCP subflow,
* the subflow socket stays around until deleted.
* No packets such as FINs must be sent after RST.
*/
- return (0);
+ return 0;
}
#endif /* MPTCP */
again:
+#if MPTCP
+ mptcp_acknow = FALSE;
+#endif
+
KERNEL_DEBUG(DBG_FNC_TCP_OUTPUT | DBG_FUNC_START, 0,0,0,0,0);
#if INET6
if (tp->t_state >= TCPS_CLOSE_WAIT) {
tcp_drop(tp, EADDRNOTAVAIL);
- return(EADDRNOTAVAIL);
+ return EADDRNOTAVAIL;
}
- /* Set retransmit timer if it wasn't set,
+ /*
+ * Set retransmit timer if it wasn't set,
* reset Persist timer and shift register as the
* advertised peer window may not be valid anymore
*/
-
- if (!tp->t_timer[TCPT_REXMT]) {
+ if (tp->t_timer[TCPT_REXMT] == 0) {
tp->t_timer[TCPT_REXMT] =
OFFSET_FROM_START(tp, tp->t_rxtcur);
- if (tp->t_timer[TCPT_PERSIST]) {
+ if (tp->t_timer[TCPT_PERSIST] != 0) {
tp->t_timer[TCPT_PERSIST] = 0;
- tp->t_rxtshift = 0;
tp->t_persist_stop = 0;
- tp->t_rxtstart = 0;
+ TCP_RESET_REXMT_STATE(tp);
}
}
TCP_PKTLIST_CLEAR(tp);
/* drop connection if source address isn't available */
- if (so->so_flags & SOF_NOADDRAVAIL) {
+ if (so->so_flags & SOF_NOADDRAVAIL) {
tcp_drop(tp, EADDRNOTAVAIL);
- return(EADDRNOTAVAIL);
+ return EADDRNOTAVAIL;
} else {
tcp_check_timer_state(tp);
- return(0); /* silently ignore, keep data in socket: address may be back */
+ return 0; /* silently ignore, keep data in socket: address may be back */
}
}
if (ia != NULL)
if ((ifp = rt->rt_ifp) != NULL) {
somultipages(so, (ifp->if_hwassist & IFNET_MULTIPAGES));
tcp_set_tso(tp, ifp);
- soif2kcl(so,
- (ifp->if_eflags & IFEF_2KCL));
+ soif2kcl(so, (ifp->if_eflags & IFEF_2KCL));
+ tcp_set_ecn(tp, ifp);
}
if (rt->rt_flags & RTF_UP)
RT_GENID_SYNC(rt);
* has been disabled)
*/
- if (!path_mtu_discovery || ((rt != NULL) &&
+ if (!path_mtu_discovery || ((rt != NULL) &&
(!(rt->rt_flags & RTF_UP) ||
- (rt->rt_rmx.rmx_locks & RTV_MTU))))
+ (rt->rt_rmx.rmx_locks & RTV_MTU))))
tp->t_flags &= ~TF_PMTUD;
else
tp->t_flags |= TF_PMTUD;
if (SACK_ENABLED(tp) && IN_FASTRECOVERY(tp) &&
(p = tcp_sack_output(tp, &sack_bytes_rxmt))) {
int32_t cwin;
-
+
cwin = min(tp->snd_wnd, tp->snd_cwnd) - sack_bytes_rxmt;
if (cwin < 0)
cwin = 0;
len = ((int32_t)min(cwin, p->end - p->rxmit));
}
if (len > 0) {
- off = p->rxmit - tp->snd_una;
+ off = p->rxmit - tp->snd_una;
sack_rxmit = 1;
sendalot = 1;
tcpstat.tcps_sack_rexmits++;
tcpstat.tcps_sack_rexmit_bytes +=
min(len, tp->t_maxseg);
- if (nstat_collect) {
- nstat_route_tx(inp->inp_route.ro_rt, 1,
- min(len, tp->t_maxseg),
- NSTAT_TX_FLAG_RETRANSMIT);
- INP_ADD_STAT(inp, cell, wifi, wired,
- txpackets, 1);
- INP_ADD_STAT(inp, cell, wifi, wired,
- txbytes, min(len, tp->t_maxseg));
- tp->t_stat.txretransmitbytes += min(len, tp->t_maxseg);
- }
} else {
len = 0;
}
sendwin = 1;
} else {
tp->t_timer[TCPT_PERSIST] = 0;
- tp->t_rxtshift = 0;
- tp->t_rxtstart = 0;
tp->t_persist_stop = 0;
+ TCP_RESET_REXMT_STATE(tp);
}
}
* sending new data, having retransmitted all the
* data possible in the scoreboard.
*/
- len = min(so->so_snd.sb_cc, tp->snd_wnd)
+ len = min(so->so_snd.sb_cc, tp->snd_wnd)
- off;
/*
* Don't remove this (len > 0) check !
- * We explicitly check for len > 0 here (although it
- * isn't really necessary), to work around a gcc
+ * We explicitly check for len > 0 here (although it
+ * isn't really necessary), to work around a gcc
* optimization issue - to force gcc to compute
* len above. Without this check, the computation
* of len is bungled by the optimizer.
}
}
-#if MPTCP
- if ((tp->t_mpflags & TMPF_FASTJOIN_SEND) &&
- (tp->t_state == TCPS_SYN_SENT) &&
- (!(tp->t_flags & TF_CLOSING)) &&
- (so->so_snd.sb_cc != 0) &&
- (tp->t_rxtshift == 0)) {
- flags &= ~TH_SYN;
- flags |= TH_ACK;
- off = 0;
- len = min(so->so_snd.sb_cc, tp->t_maxseg);
- early_data_sent = TRUE;
- } else if (early_data_sent) {
- /* for now, we allow only one data segment to be sent */
- return (0);
- }
-#endif /* MPTCP */
/*
* Lop off SYN bit if it has already been sent. However, if this
* is SYN-SENT state and if segment contains data and if we don't
* know that foreign host supports TAO, suppress sending segment.
*/
if ((flags & TH_SYN) && SEQ_GT(tp->snd_nxt, tp->snd_una)) {
- if (tp->t_state != TCPS_SYN_RECEIVED || tfo_enabled(tp))
- flags &= ~TH_SYN;
- off--, len++;
- if (len > 0 && tp->t_state == TCPS_SYN_SENT) {
- while (inp->inp_sndinprog_cnt == 0 &&
- tp->t_pktlist_head != NULL) {
- packetlist = tp->t_pktlist_head;
- packchain_listadd = tp->t_lastchain;
- packchain_sent++;
- TCP_PKTLIST_CLEAR(tp);
-
- error = tcp_ip_output(so, tp, packetlist,
- packchain_listadd, tp_inp_options,
- (so_options & SO_DONTROUTE),
- (sack_rxmit | (sack_bytes_rxmt != 0)), 0,
-#if INET6
- isipv6);
-#else /* INET6 */
- 0);
-#endif /* !INET6 */
-
-
+ if (tp->t_state == TCPS_SYN_RECEIVED && tfo_enabled(tp) && tp->snd_nxt == tp->snd_una + 1) {
+ /* We are sending the SYN again! */
+ off--;
+ len++;
+ } else {
+ if (tp->t_state != TCPS_SYN_RECEIVED || tfo_enabled(tp)) {
+ flags &= ~TH_SYN;
}
- /*
- * tcp was closed while we were in ip,
- * resume close
- */
- if (inp->inp_sndinprog_cnt == 0 &&
- (tp->t_flags & TF_CLOSING)) {
- tp->t_flags &= ~TF_CLOSING;
- (void) tcp_close(tp);
- } else {
- tcp_check_timer_state(tp);
+ off--;
+ len++;
+ if (len > 0 && tp->t_state == TCPS_SYN_SENT) {
+ while (inp->inp_sndinprog_cnt == 0 &&
+ tp->t_pktlist_head != NULL) {
+ packetlist = tp->t_pktlist_head;
+ packchain_listadd = tp->t_lastchain;
+ packchain_sent++;
+ TCP_PKTLIST_CLEAR(tp);
+
+ error = tcp_ip_output(so, tp, packetlist,
+ packchain_listadd, tp_inp_options,
+ (so_options & SO_DONTROUTE),
+ (sack_rxmit || (sack_bytes_rxmt != 0)),
+ isipv6);
+ }
+
+ /*
+ * tcp was closed while we were in ip,
+ * resume close
+ */
+ if (inp->inp_sndinprog_cnt == 0 &&
+ (tp->t_flags & TF_CLOSING)) {
+ tp->t_flags &= ~TF_CLOSING;
+ (void) tcp_close(tp);
+ } else {
+ tcp_check_timer_state(tp);
+ }
+ KERNEL_DEBUG(DBG_FNC_TCP_OUTPUT | DBG_FUNC_END,
+ 0,0,0,0,0);
+ return 0;
}
- KERNEL_DEBUG(DBG_FNC_TCP_OUTPUT | DBG_FUNC_END,
- 0,0,0,0,0);
- return(0);
}
}
flags &= ~TH_FIN;
}
+ /*
+ * Don't send a RST with data.
+ */
+ if (flags & TH_RST)
+ len = 0;
+
if ((flags & TH_SYN) && tp->t_state <= TCPS_SYN_SENT && tfo_enabled(tp))
len = tcp_tfo_check(tp, len);
/*
* The check here used to be (len < 0). Some times len is zero
* when the congestion window is closed and we need to check
- * if persist timer has to be set in that case. But don't set
+ * if persist timer has to be set in that case. But don't set
* persist until connection is established.
- */
+ */
if (len <= 0 && !(flags & TH_SYN)) {
/*
* If FIN has been sent but not acked,
if (sendwin == 0) {
tp->t_timer[TCPT_REXMT] = 0;
tp->t_timer[TCPT_PTO] = 0;
- tp->t_rxtshift = 0;
- tp->t_rxtstart = 0;
+ TCP_RESET_REXMT_STATE(tp);
tp->snd_nxt = tp->snd_una;
off = 0;
if (tp->t_timer[TCPT_PERSIST] == 0)
* 3. our send window (slow start and congestion controlled) is
* larger than sent but unacknowledged data in send buffer.
*/
- basertt = get_base_rtt(tp);
if (tcp_do_autosendbuf == 1 &&
!INP_WAIT_FOR_IF_FEEDBACK(inp) && !IN_FASTRECOVERY(tp) &&
(so->so_snd.sb_flags & (SB_AUTOSIZE | SB_TRIM)) == SB_AUTOSIZE &&
tcp_cansbgrow(&so->so_snd)) {
if ((tp->snd_wnd / 4 * 5) >= so->so_snd.sb_hiwat &&
so->so_snd.sb_cc >= (so->so_snd.sb_hiwat / 8 * 7) &&
- sendwin >= (so->so_snd.sb_cc -
- (tp->snd_nxt - tp->snd_una))) {
- /* Also increase the send buffer only if the
- * round-trip time is not increasing because we do
- * not want to contribute to latency by filling
- * buffers.
- * We also do not want to hold onto application's
- * old data for too long. Interactive applications
- * would rather discard old data.
- */
- if (tp->t_rttcur <= (basertt + 25)) {
- if (sbreserve(&so->so_snd,
- min(so->so_snd.sb_hiwat + tcp_autosndbuf_inc,
- tcp_autosndbuf_max)) == 1) {
- so->so_snd.sb_idealsize = so->so_snd.sb_hiwat;
- }
- } else {
- so->so_snd.sb_idealsize =
- max(tcp_sendspace, so->so_snd.sb_hiwat -
- (2 * tcp_autosndbuf_inc));
- so->so_snd.sb_flags |= SB_TRIM;
+ sendwin >= (so->so_snd.sb_cc - (tp->snd_nxt - tp->snd_una))) {
+ if (sbreserve(&so->so_snd,
+ min(so->so_snd.sb_hiwat + tcp_autosndbuf_inc,
+ tcp_autosndbuf_max)) == 1) {
+ so->so_snd.sb_idealsize = so->so_snd.sb_hiwat;
}
}
}
}
#if MPTCP
- if ((so->so_flags & SOF_MP_SUBFLOW) &&
+ if (so->so_flags & SOF_MP_SUBFLOW && off < 0) {
+ os_log_error(mptcp_log_handle, "%s - %lx: offset is negative! len %d off %d\n",
+ __func__, (unsigned long)VM_KERNEL_ADDRPERM(tp->t_mpsub->mpts_mpte),
+ len, off);
+ }
+
+ if ((so->so_flags & SOF_MP_SUBFLOW) &&
!(tp->t_mpflags & TMPF_TCP_FALLBACK)) {
int newlen = len;
- if (!(tp->t_mpflags & TMPF_PREESTABLISHED) &&
- (tp->t_state > TCPS_CLOSED) &&
- ((tp->t_mpflags & TMPF_SND_MPPRIO) ||
- (tp->t_mpflags & TMPF_SND_REM_ADDR) ||
- (tp->t_mpflags & TMPF_SND_MPFAIL) ||
- (tp->t_mpflags & TMPF_MPCAP_RETRANSMIT))) {
+ if (tp->t_state >= TCPS_ESTABLISHED &&
+ (tp->t_mpflags & TMPF_SND_MPPRIO ||
+ tp->t_mpflags & TMPF_SND_REM_ADDR ||
+ tp->t_mpflags & TMPF_SND_MPFAIL ||
+ tp->t_mpflags & TMPF_SND_KEYS ||
+ tp->t_mpflags & TMPF_SND_JACK)) {
if (len > 0) {
len = 0;
}
- sendalot = 1;
+ /*
+ * On a new subflow, don't try to send again, because
+ * we are still waiting for the fourth ack.
+ */
+ if (!(tp->t_mpflags & TMPF_PREESTABLISHED))
+ sendalot = 1;
mptcp_acknow = TRUE;
} else {
mptcp_acknow = FALSE;
}
/*
* The contiguous bytes in the subflow socket buffer can be
- * discontiguous at the MPTCP level. Since only one DSS
+ * discontiguous at the MPTCP level. Since only one DSS
* option can be sent in one packet, reduce length to match
* the contiguous MPTCP level. Set sendalot to send remainder.
*/
- if (len > 0)
- newlen = mptcp_adj_sendlen(so, off, len);
+ if (len > 0 && off >= 0) {
+ newlen = mptcp_adj_sendlen(so, off);
+ }
+
if (newlen < len) {
len = newlen;
- sendalot = 1;
}
}
#endif /* MPTCP */
* pull the amount of data that can be sent from the
* unordered priority queues to the serial queue in
* the socket buffer. If bytes are not yet available
- * in the highest priority message, we may not be able
- * to send any new data.
+ * in the highest priority message, we may not be able
+ * to send any new data.
*/
if (so->so_flags & SOF_ENABLE_MSGS) {
if ((off + len) >
sbpull_unordered_data(so, off, len);
/* check if len needs to be modified */
- if ((off + len) >
+ if ((off + len) >
so->so_msg_state->msg_serial_bytes) {
len = so->so_msg_state->msg_serial_bytes - off;
if (len <= 0) {
if (SEQ_LT(tp->snd_nxt + len, tp->snd_una + so->so_snd.sb_cc))
flags &= ~TH_FIN;
}
-
+ /*
+ * Compare available window to amount of window
+ * known to peer (as advertised window less
+ * next expected input). If the difference is at least two
+ * max size segments, or at least 25% of the maximum possible
+ * window, then want to send a window update to peer.
+ */
recwin = tcp_sbspace(tp);
+ if (!(so->so_flags & SOF_MP_SUBFLOW)) {
+ if (recwin < (int32_t)(so->so_rcv.sb_hiwat / 4) &&
+ recwin < (int)tp->t_maxseg) {
+ recwin = 0;
+ }
+ } else {
+ struct mptcb *mp_tp = tptomptp(tp);
+ struct socket *mp_so = mptetoso(mp_tp->mpt_mpte);
+
+ if (recwin < (int32_t)(mp_so->so_rcv.sb_hiwat / 4) &&
+ recwin < (int)tp->t_maxseg) {
+ recwin = 0;
+ }
+ }
+
+#if TRAFFIC_MGT
+ if (tcp_recv_bg == 1 || IS_TCP_RECV_BG(so)) {
+ if (recwin > 0 && tcp_recv_throttle(tp)) {
+ uint32_t min_iaj_win = tcp_min_iaj_win * tp->t_maxseg;
+ uint32_t bg_rwintop = tp->rcv_adv;
+ if (SEQ_LT(bg_rwintop, tp->rcv_nxt + min_iaj_win))
+ bg_rwintop = tp->rcv_nxt + min_iaj_win;
+ recwin = imin((int32_t)(bg_rwintop - tp->rcv_nxt),
+ recwin);
+ if (recwin < 0)
+ recwin = 0;
+ }
+ }
+#endif /* TRAFFIC_MGT */
+
+ if (recwin > (int32_t)(TCP_MAXWIN << tp->rcv_scale))
+ recwin = (int32_t)(TCP_MAXWIN << tp->rcv_scale);
+
+ if (!(so->so_flags & SOF_MP_SUBFLOW)) {
+ if (recwin < (int32_t)(tp->rcv_adv - tp->rcv_nxt)) {
+ recwin = (int32_t)(tp->rcv_adv - tp->rcv_nxt);
+ }
+ } else {
+ struct mptcb *mp_tp = tptomptp(tp);
+
+ /* Don't remove what we announced at the MPTCP-layer */
+ if (recwin < (int32_t)(mp_tp->mpt_rcvadv - (uint32_t)mp_tp->mpt_rcvnxt)) {
+ recwin = (int32_t)(mp_tp->mpt_rcvadv - (uint32_t)mp_tp->mpt_rcvnxt);
+ }
+ }
+
/*
* Sender silly window avoidance. We transmit under the following
* conditions when len is non-zero:
if (sack_rxmit)
goto send;
+ /*
+ * If this here is the first segment after SYN/ACK and TFO
+ * is being used, then we always send it, regardless of Nagle,...
+ */
+ if (tp->t_state == TCPS_SYN_RECEIVED &&
+ tfo_enabled(tp) &&
+ (tp->t_tfo_flags & TFO_F_COOKIE_VALID) &&
+ tp->snd_nxt == tp->iss + 1)
+ goto send;
+
/*
* Send new data on the connection only if it is
* not flow controlled
tp->t_state != TCPS_ESTABLISHED) {
if (len >= tp->t_maxseg)
goto send;
+
if (!(tp->t_flags & TF_MORETOCOME) &&
- (idle || tp->t_flags & TF_NODELAY ||
- tp->t_flags & TF_MAXSEGSNT ||
+ (idle || tp->t_flags & TF_NODELAY ||
+ (tp->t_flags & TF_MAXSEGSNT) ||
ALLOW_LIMITED_TRANSMIT(tp)) &&
(tp->t_flags & TF_NOPUSH) == 0 &&
- len + off >= so->so_snd.sb_cc)
+ (len + off >= so->so_snd.sb_cc ||
+ /*
+ * MPTCP needs to respect the DSS-mappings. So, it
+ * may be sending data that *could* have been
+ * coalesced, but cannot because of
+ * mptcp_adj_sendlen().
+ */
+ so->so_flags & SOF_MP_SUBFLOW))
goto send;
if (len >= tp->max_sndwnd / 2 && tp->max_sndwnd > 0)
goto send;
}
}
- /*
- * Compare available window to amount of window
- * known to peer (as advertised window less
- * next expected input). If the difference is at least two
- * max size segments, or at least 25% of the maximum possible
- * window, then want to send a window update to peer.
- * Skip this if the connection is in T/TCP half-open state.
- */
if (recwin > 0 && !(tp->t_flags & TF_NEEDSYN)) {
/*
* "adv" is the amount we can increase the window,
/*
* Update only if the resulting scaled value of
* the window changed, or if there is a change in
- * the sequence since the last ack. This avoids
+ * the sequence since the last ack. This avoids
* what appears as dupe ACKS (see rdar://5640997)
*
* If streaming is detected avoid sending too many
- * window updates. We will depend on the delack
+ * window updates. We will depend on the delack
* timer to send a window update when needed.
*/
if (!(tp->t_flags & TF_STRETCHACK) &&
- (tp->last_ack_sent != tp->rcv_nxt ||
+ (tp->last_ack_sent != tp->rcv_nxt ||
((oldwin + adv) >> tp->rcv_scale) >
(oldwin >> tp->rcv_scale))) {
goto send;
}
- /*
- * Make sure that the delayed ack timer is set if
- * we delayed sending a window update because of
- * streaming detection.
- */
- if ((tp->t_flags & TF_STRETCHACK) &&
- !(tp->t_flags & TF_DELACK)) {
- tp->t_flags |= TF_DELACK;
- tp->t_timer[TCPT_DELACK] =
- OFFSET_FROM_START(tp, tcp_delack);
- }
}
- if (4 * adv >= (int32_t) so->so_rcv.sb_hiwat)
- goto send;
+ if (4 * adv >= (int32_t) so->so_rcv.sb_hiwat)
+ goto send;
+
+ /*
+ * Make sure that the delayed ack timer is set if
+ * we delayed sending a window update because of
+ * streaming detection.
+ */
+ if ((tp->t_flags & TF_STRETCHACK) &&
+ !(tp->t_flags & TF_DELACK)) {
+ tp->t_flags |= TF_DELACK;
+ tp->t_timer[TCPT_DELACK] =
+ OFFSET_FROM_START(tp, tcp_delack);
+ }
}
/*
* after the retransmission timer has been turned off. Make sure
* that the retransmission timer is set.
*/
- if (SACK_ENABLED(tp) && (tp->t_state >= TCPS_ESTABLISHED) &&
+ if (SACK_ENABLED(tp) && (tp->t_state >= TCPS_ESTABLISHED) &&
SEQ_GT(tp->snd_max, tp->snd_una) &&
tp->t_timer[TCPT_REXMT] == 0 &&
tp->t_timer[TCPT_PERSIST] == 0) {
tp->t_timer[TCPT_REXMT] = OFFSET_FROM_START(tp,
tp->t_rxtcur);
goto just_return;
- }
+ }
/*
* TCP window updates are not reliable, rather a polling protocol
* using ``persist'' packets is used to insure receipt of window
*/
if (so->so_snd.sb_cc && tp->t_timer[TCPT_REXMT] == 0 &&
tp->t_timer[TCPT_PERSIST] == 0) {
- tp->t_rxtshift = 0;
- tp->t_rxtstart = 0;
+ TCP_RESET_REXMT_STATE(tp);
tcp_setpersist(tp);
}
just_return:
error = tcp_ip_output(so, tp, packetlist,
packchain_listadd,
tp_inp_options, (so_options & SO_DONTROUTE),
- (sack_rxmit | (sack_bytes_rxmt != 0)), recwin,
-#if INET6
- isipv6);
-#else /* INET6 */
- 0);
-#endif /* !INET6 */
+ (sack_rxmit || (sack_bytes_rxmt != 0)), isipv6);
}
/* tcp was closed while we were in ip; resume close */
if (inp->inp_sndinprog_cnt == 0 &&
tcp_check_timer_state(tp);
}
KERNEL_DEBUG(DBG_FNC_TCP_OUTPUT | DBG_FUNC_END, 0,0,0,0,0);
- return (0);
+ return 0;
send:
/*
optlen += 4;
}
#if MPTCP
- if (mptcp_enable) {
- optlen = mptcp_setup_syn_opts(so, flags, opt,
- optlen);
+ if (mptcp_enable && (so->so_flags & SOF_MP_SUBFLOW)) {
+ optlen = mptcp_setup_syn_opts(so, opt, optlen);
}
#endif /* MPTCP */
}
tp->rfbuf_ts = tcp_now;
if (SACK_ENABLED(tp) && ((tp->t_flags & TF_NOOPT) == 0)) {
- /*
+ /*
* Tack on the SACK permitted option *last*.
* And do padding of options after tacking this on.
* This is because of MSS, TS, WinScale and Signatures are
tp->t_mpflags |= TMPF_MPTCP_ACKNOW;
}
optlen = mptcp_setup_opts(tp, off, &opt[0], optlen, flags,
- len, &dlenp, &finp, &dss_val, &sseqp, &mptcp_acknow);
+ len, &mptcp_acknow);
tp->t_mpflags &= ~TMPF_SEND_DSN;
}
#endif /* MPTCP */
if (tfo_enabled(tp) && !(tp->t_flags & TF_NOOPT) &&
(flags & (TH_SYN | TH_ACK)) == TH_SYN)
- optlen += tcp_tfo_write_cookie(tp, optlen, &len, opt);
+ optlen += tcp_tfo_write_cookie(tp, optlen, len, opt);
if (tfo_enabled(tp) &&
(flags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK) &&
*lp++ = htonl(tp->t_dsack_lseq);
*lp++ = htonl(tp->t_dsack_rseq);
tcpstat.tcps_dsack_sent++;
+ tp->t_dsack_sent++;
nsack--;
}
VERIFY(nsack == 0 || tp->rcv_numsacks >= nsack);
*
* For a SYN-ACK, send an ECN setup SYN-ACK
*/
- if ((tcp_ecn_inbound || (tp->t_flags & TF_ENABLE_ECN))
- && (flags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK)) {
+ if ((flags & (TH_SYN | TH_ACK)) == (TH_SYN | TH_ACK) &&
+ (tp->ecn_flags & TE_ENABLE_ECN)) {
if (tp->ecn_flags & TE_SETUPRECEIVED) {
if (tcp_send_ecn_flags_on_syn(tp, so)) {
/*
if (tp->ecn_flags & TE_SETUPSENT) {
tcpstat.tcps_ecn_lost_synack++;
tcpstat.tcps_ecn_server_success--;
+ tp->ecn_flags |= TE_LOST_SYNACK;
}
tp->ecn_flags &=
TE_SENDCWR);
}
}
- } else if ((tcp_ecn_outbound || (tp->t_flags & TF_ENABLE_ECN))
- && (flags & (TH_SYN | TH_ACK)) == TH_SYN) {
+ } else if ((flags & (TH_SYN | TH_ACK)) == TH_SYN &&
+ (tp->ecn_flags & TE_ENABLE_ECN)) {
if (tcp_send_ecn_flags_on_syn(tp, so)) {
/*
* Setting TH_ECE and TH_CWR makes this an
*/
flags |= (TH_ECE | TH_CWR);
tcpstat.tcps_ecn_client_setup++;
+ tp->ecn_flags |= TE_CLIENT_SETUP;
/*
* Record that we sent the ECN-setup and default to
* Fall back to non-ECN and clear flag indicating
* we should send data with IP ECT set.
*/
- if (tp->ecn_flags & TE_SETUPSENT)
+ if (tp->ecn_flags & TE_SETUPSENT) {
tcpstat.tcps_ecn_lost_syn++;
+ tp->ecn_flags |= TE_LOST_SYN;
+ }
tp->ecn_flags &= ~TE_SENDIPECT;
}
}
sendalot = 1;
}
}
-#if MPTCP
- /* Adjust the length in the DSS option, if it is lesser than len */
- if (dlenp) {
- /*
- * To test this path without SACK, artificially
- * decrement len with something like
- * if (len > 10)
- len -= 10;
- */
- if (ntohs(*dlenp) > len) {
- *dlenp = htons(len);
- /* Unset the FIN flag, if len was adjusted */
- if (finp) {
- *finp &= ~MDSS_F;
- }
- sendalot = 1;
- }
- }
-#endif /* MPTCP */
if (max_linkhdr + hdrlen > MCLBYTES)
panic("tcphdr too big");
/* Check if there is enough data in the send socket
- * buffer to start measuring bw
+ * buffer to start measuring bandwidth
*/
if ((tp->t_flagsext & TF_MEASURESNDBW) != 0 &&
(tp->t_bwmeas != NULL) &&
- (tp->t_flagsext & TF_BWMEAS_INPROGRESS) == 0 &&
- (so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)) >=
- tp->t_bwmeas->bw_minsize) {
- tp->t_bwmeas->bw_size = min(
- (so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)),
- tp->t_bwmeas->bw_maxsize);
- tp->t_flagsext |= TF_BWMEAS_INPROGRESS;
- tp->t_bwmeas->bw_start = tp->snd_max;
- tp->t_bwmeas->bw_ts = tcp_now;
+ (tp->t_flagsext & TF_BWMEAS_INPROGRESS) == 0) {
+ tp->t_bwmeas->bw_size = min(min(
+ (so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)),
+ tp->snd_cwnd), tp->snd_wnd);
+ if (tp->t_bwmeas->bw_minsize > 0 &&
+ tp->t_bwmeas->bw_size < tp->t_bwmeas->bw_minsize)
+ tp->t_bwmeas->bw_size = 0;
+ if (tp->t_bwmeas->bw_maxsize > 0)
+ tp->t_bwmeas->bw_size = min(tp->t_bwmeas->bw_size,
+ tp->t_bwmeas->bw_maxsize);
+ if (tp->t_bwmeas->bw_size > 0) {
+ tp->t_flagsext |= TF_BWMEAS_INPROGRESS;
+ tp->t_bwmeas->bw_start = tp->snd_max;
+ tp->t_bwmeas->bw_ts = tcp_now;
+ }
}
VERIFY(inp->inp_flowhash != 0);
INP_ADD_STAT(inp, cell, wifi, wired,
txbytes, len);
tp->t_stat.txretransmitbytes += len;
+ tp->t_stat.rxmitpkts++;
}
} else {
tcpstat.tcps_sndpack++;
tcpstat.tcps_sndbyte += len;
-
+
if (nstat_collect) {
INP_ADD_STAT(inp, cell, wifi, wired,
txpackets, 1);
INP_ADD_STAT(inp, cell, wifi, wired,
txbytes, len);
}
+ inp_decr_sndbytes_unsent(so, len);
}
+ inp_set_activity_bitmap(inp);
#if MPTCP
if (tp->t_mpflags & TMPF_MPTCP_TRUE) {
tcpstat.tcps_mp_sndpacks++;
}
#endif /* MPTCP */
/*
- * try to use the new interface that allocates all
- * the necessary mbuf hdrs under 1 mbuf lock and
- * avoids rescanning the socket mbuf list if
+ * try to use the new interface that allocates all
+ * the necessary mbuf hdrs under 1 mbuf lock and
+ * avoids rescanning the socket mbuf list if
* certain conditions are met. This routine can't
* be used in the following cases...
* 1) the protocol headers exceed the capacity of
error = 0; /* should we return an error? */
goto out;
}
-
+
/*
* m_copym_with_hdrs will always return the
* last mbuf pointer and the offset into it that
goto out;
}
if (MHLEN < (hdrlen + max_linkhdr)) {
- MCLGET(m, M_DONTWAIT);
- if ((m->m_flags & M_EXT) == 0) {
- m_freem(m);
- error = ENOBUFS;
- goto out;
- }
+ MCLGET(m, M_DONTWAIT);
+ if ((m->m_flags & M_EXT) == 0) {
+ m_freem(m);
+ error = ENOBUFS;
+ goto out;
+ }
}
m->m_data += max_linkhdr;
m->m_len = hdrlen;
}
m->m_pkthdr.rcvif = 0;
-#if MPTCP
- /* Before opt is copied to the mbuf, set the csum field */
- mptcp_output_csum(tp, m, len, hdrlen, dss_val, sseqp);
-#endif /* MPTCP */
#if CONFIG_MACF_NET
mac_mbuf_label_associate_inpcb(inp, m);
#endif
}
svc_flags |= PKT_SCF_IPV6;
#if PF_ECN
- m->m_pkthdr.pf_mtag.pftag_hdr = (void *)ip6;
- m->m_pkthdr.pf_mtag.pftag_flags |= PF_TAG_HDR_INET6;
+ m_pftag(m)->pftag_hdr = (void *)ip6;
+ m_pftag(m)->pftag_flags |= PF_TAG_HDR_INET6;
#endif /* PF_ECN */
} else
#endif /* INET6 */
ip->ip_tos |= IPTOS_ECN_ECT0;
}
#if PF_ECN
- m->m_pkthdr.pf_mtag.pftag_hdr = (void *)ip;
- m->m_pkthdr.pf_mtag.pftag_flags |= PF_TAG_HDR_INET;
+ m_pftag(m)->pftag_hdr = (void *)ip;
+ m_pftag(m)->pftag_flags |= PF_TAG_HDR_INET;
#endif /* PF_ECN */
}
if (len || (flags & (TH_SYN|TH_FIN)) ||
tp->t_timer[TCPT_PERSIST]) {
th->th_seq = htonl(tp->snd_nxt);
+ if (len > 0) {
+ m->m_pkthdr.tx_start_seq = tp->snd_nxt;
+ m->m_pkthdr.pkt_flags |= PKTF_START_SEQ;
+ }
if (SEQ_LT(tp->snd_nxt, tp->snd_max)) {
if (SACK_ENABLED(tp) && len > 1) {
tcp_rxtseg_insert(tp, tp->snd_nxt,
(tp->snd_nxt + len - 1));
}
- m->m_pkthdr.pkt_flags |= PKTF_TCP_REXMT;
+ if (len > 0)
+ m->m_pkthdr.pkt_flags |=
+ PKTF_TCP_REXMT;
}
} else {
th->th_seq = htonl(tp->snd_max);
}
} else {
th->th_seq = htonl(p->rxmit);
+ if (len > 0) {
+ m->m_pkthdr.pkt_flags |=
+ (PKTF_TCP_REXMT | PKTF_START_SEQ);
+ m->m_pkthdr.tx_start_seq = p->rxmit;
+ }
tcp_rxtseg_insert(tp, p->rxmit, (p->rxmit + len - 1));
p->rxmit += len;
tp->sackhint.sack_bytes_rexmit += len;
- m->m_pkthdr.pkt_flags |= PKTF_TCP_REXMT;
}
th->th_ack = htonl(tp->rcv_nxt);
tp->last_ack_sent = tp->rcv_nxt;
-#if MPTCP
- /* Initialize the ACK field to a value as 0 ack fields are dropped */
- if (early_data_sent) {
- th->th_ack = th->th_seq + 1;
- }
-#endif /* MPTCP */
if (optlen) {
bcopy(opt, th + 1, optlen);
th->th_off = (sizeof (struct tcphdr) + optlen) >> 2;
}
th->th_flags = flags;
- /*
- * Calculate receive window. Don't shrink window,
- * but avoid silly window syndrome.
- */
- if (recwin < (int32_t)(so->so_rcv.sb_hiwat / 4) && recwin < (int)tp->t_maxseg)
- recwin = 0;
- if (recwin < (int32_t)(tp->rcv_adv - tp->rcv_nxt))
- recwin = (int32_t)(tp->rcv_adv - tp->rcv_nxt);
- if (tp->t_flags & TF_SLOWLINK && slowlink_wsize > 0) {
- if (recwin > (int32_t)slowlink_wsize)
- recwin = slowlink_wsize;
- }
+ th->th_win = htons((u_short) (recwin>>tp->rcv_scale));
+ if (!(so->so_flags & SOF_MP_SUBFLOW)) {
+ if (recwin > 0 && SEQ_LT(tp->rcv_adv, tp->rcv_nxt + recwin)) {
+ tp->rcv_adv = tp->rcv_nxt + recwin;
+ }
+ } else {
+ struct mptcb *mp_tp = tptomptp(tp);
+ if (recwin > 0) {
+ tp->rcv_adv = tp->rcv_nxt + recwin;
+ }
-#if TRAFFIC_MGT
- if (tcp_recv_bg == 1 || IS_TCP_RECV_BG(so)) {
- if (tcp_recv_throttle(tp)) {
- uint32_t min_iaj_win =
- tcp_min_iaj_win * tp->t_maxseg;
- if (tp->iaj_rwintop == 0 ||
- SEQ_LT(tp->iaj_rwintop, tp->rcv_adv))
- tp->iaj_rwintop = tp->rcv_adv;
- if (SEQ_LT(tp->iaj_rwintop,
- tp->rcv_nxt + min_iaj_win))
- tp->iaj_rwintop = tp->rcv_nxt + min_iaj_win;
- recwin = min(tp->iaj_rwintop - tp->rcv_nxt, recwin);
+ if (recwin > 0 && SEQ_LT(mp_tp->mpt_rcvadv, (uint32_t)mp_tp->mpt_rcvnxt + recwin)) {
+ mp_tp->mpt_rcvadv = (uint32_t)mp_tp->mpt_rcvnxt + recwin;
}
}
-#endif /* TRAFFIC_MGT */
-
- if (recwin > (int32_t)(TCP_MAXWIN << tp->rcv_scale))
- recwin = (int32_t)(TCP_MAXWIN << tp->rcv_scale);
- th->th_win = htons((u_short) (recwin>>tp->rcv_scale));
/*
* Adjust the RXWIN0SENT flag - indicate that we have advertised
tp->t_flags |= TF_RXWIN0SENT;
else
tp->t_flags &= ~TF_RXWIN0SENT;
+
if (SEQ_GT(tp->snd_up, tp->snd_nxt)) {
th->th_urp = htons((u_short)(tp->snd_up - tp->snd_nxt));
th->th_flags |= TH_URG;
* checksum extended header and data.
*/
m->m_pkthdr.len = hdrlen + len; /* in6_cksum() need this */
+
+ /*
+ * If this is potentially the last packet on the stream, then mark
+ * it in order to enable some optimizations in the underlying
+ * layers
+ */
+ if (tp->t_state != TCPS_ESTABLISHED &&
+ (tp->t_state == TCPS_CLOSING || tp->t_state == TCPS_TIME_WAIT
+ || tp->t_state == TCPS_LAST_ACK || (th->th_flags & TH_RST)))
+ m->m_pkthdr.pkt_flags |= PKTF_LAST_PKT;
+
#if INET6
if (isipv6) {
/*
m->m_pkthdr.csum_flags = CSUM_TCPIPV6;
m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum);
if (len + optlen)
- th->th_sum = in_addword(th->th_sum,
+ th->th_sum = in_addword(th->th_sum,
htons((u_short)(optlen + len)));
}
else
m->m_pkthdr.csum_flags = CSUM_TCP;
m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum);
if (len + optlen)
- th->th_sum = in_addword(th->th_sum,
+ th->th_sum = in_addword(th->th_sum,
htons((u_short)(optlen + len)));
}
if (flags & (TH_SYN|TH_FIN)) {
if (flags & TH_SYN)
tp->snd_nxt++;
- if ((flags & TH_FIN) &&
+ if ((flags & TH_FIN) &&
!(tp->t_flags & TF_SENTFIN)) {
tp->snd_nxt++;
tp->t_flags |= TF_SENTFIN;
}
if (SEQ_GT(tp->snd_nxt, tp->snd_max)) {
tp->snd_max = tp->snd_nxt;
+ tp->t_sndtime = tcp_now;
/*
* Time this transmission if not a retransmission and
* not currently timing anything.
tp->snd_nxt != tp->snd_una || (flags & TH_FIN))) {
if (tp->t_timer[TCPT_PERSIST]) {
tp->t_timer[TCPT_PERSIST] = 0;
- tp->t_rxtshift = 0;
- tp->t_rxtstart = 0;
tp->t_persist_stop = 0;
+ TCP_RESET_REXMT_STATE(tp);
}
tp->t_timer[TCPT_REXMT] =
OFFSET_FROM_START(tp, tp->t_rxtcur);
*
* Every time new data is sent PTO will get reset.
*/
- if (tcp_enable_tlp && tp->t_state == TCPS_ESTABLISHED &&
- SACK_ENABLED(tp) && !IN_FASTRECOVERY(tp)
- && tp->snd_nxt == tp->snd_max
- && SEQ_GT(tp->snd_nxt, tp->snd_una)
- && tp->t_rxtshift == 0
- && (tp->t_flagsext & (TF_SENT_TLPROBE|TF_PKTS_REORDERED)) == 0) {
- u_int32_t pto, srtt, new_rto = 0;
+ if (tcp_enable_tlp && len != 0 && tp->t_state == TCPS_ESTABLISHED &&
+ SACK_ENABLED(tp) && !IN_FASTRECOVERY(tp) &&
+ tp->snd_nxt == tp->snd_max &&
+ SEQ_GT(tp->snd_nxt, tp->snd_una) &&
+ tp->t_rxtshift == 0 &&
+ (tp->t_flagsext & (TF_SENT_TLPROBE|TF_PKTS_REORDERED)) == 0) {
+ u_int32_t pto, srtt;
/*
* Using SRTT alone to set PTO can cause spurious
* retransmissions on wireless networks where there
- * is a lot of variance in RTT. Taking variance
+ * is a lot of variance in RTT. Taking variance
* into account will avoid this.
*/
srtt = tp->t_srtt >> TCP_RTT_SHIFT;
pto = max(10, pto);
/* if RTO is less than PTO, choose RTO instead */
- if (tp->t_rxtcur < pto) {
- /*
- * Schedule PTO instead of RTO in favor of
- * fast recovery.
- */
+ if (tp->t_rxtcur < pto)
pto = tp->t_rxtcur;
- /* Reset the next RTO to be after PTO. */
- TCPT_RANGESET(new_rto,
- (pto + TCP_REXMTVAL(tp)),
- max(tp->t_rttmin, tp->t_rttcur + 2),
- TCPTV_REXMTMAX, 0);
- tp->t_timer[TCPT_REXMT] =
- OFFSET_FROM_START(tp, new_rto);
- }
tp->t_timer[TCPT_PTO] = OFFSET_FROM_START(tp, pto);
}
} else {
int xlen = len;
if (flags & TH_SYN)
++xlen;
- if ((flags & TH_FIN) &&
+ if ((flags & TH_FIN) &&
!(tp->t_flags & TF_SENTFIN)) {
++xlen;
tp->t_flags |= TF_SENTFIN;
}
- if (SEQ_GT(tp->snd_nxt + xlen, tp->snd_max))
+ if (SEQ_GT(tp->snd_nxt + xlen, tp->snd_max)) {
tp->snd_max = tp->snd_nxt + len;
+ tp->t_sndtime = tcp_now;
+ }
}
#if TCPDEBUG
#if NECP
{
necp_kernel_policy_id policy_id;
+ necp_kernel_policy_id skip_policy_id;
u_int32_t route_rule_id;
- if (!necp_socket_is_allowed_to_send_recv(inp, &policy_id, &route_rule_id)) {
+ if (!necp_socket_is_allowed_to_send_recv(inp, NULL, &policy_id, &route_rule_id, &skip_policy_id)) {
+ TCP_LOG_DROP_NECP(isipv6 ? (void *)ip6 : (void *)ip, th, tp, true);
m_freem(m);
error = EHOSTUNREACH;
goto out;
}
+ necp_mark_packet_from_socket(m, inp, policy_id, route_rule_id, skip_policy_id);
- necp_mark_packet_from_socket(m, inp, policy_id, route_rule_id);
+ if (net_qos_policy_restricted != 0) {
+ necp_socket_update_qos_marking(inp, inp->inp_route.ro_rt,
+ NULL, route_rule_id);
+ }
}
#endif /* NECP */
*/
m->m_pkthdr.pkt_flowsrc = FLOWSRC_INPCB;
m->m_pkthdr.pkt_flowid = inp->inp_flowhash;
- m->m_pkthdr.pkt_flags |= PKTF_FLOW_ID | PKTF_FLOW_LOCALSRC;
-#if MPTCP
- /* Disable flow advisory when using MPTCP. */
- if (!(tp->t_mpflags & TMPF_MPTCP_TRUE))
-#endif /* MPTCP */
- m->m_pkthdr.pkt_flags |= PKTF_FLOW_ADV;
+ m->m_pkthdr.pkt_flags |= (PKTF_FLOW_ID | PKTF_FLOW_LOCALSRC | PKTF_FLOW_ADV);
m->m_pkthdr.pkt_proto = IPPROTO_TCP;
+ m->m_pkthdr.tx_tcp_pid = so->last_pid;
+ if (so->so_flags & SOF_DELEGATED)
+ m->m_pkthdr.tx_tcp_e_pid = so->e_pid;
+ else
+ m->m_pkthdr.tx_tcp_e_pid = 0;
m->m_nextpkt = NULL;
!(inp->inp_last_outifp->if_flags & IFF_LOOPBACK)) {
/* Hint to prioritize this packet if
* 1. if the packet has no data
- * 2. the interface supports transmit-start model and did
+ * 2. the interface supports transmit-start model and did
* not disable ACK prioritization.
* 3. Only ACK flag is set.
* 4. there is no outstanding data on this connection.
*/
if (tcp_prioritize_acks != 0 && len == 0 &&
- (inp->inp_last_outifp->if_eflags &
- (IFEF_TXSTART | IFEF_NOACKPRI)) == IFEF_TXSTART &&
- th->th_flags == TH_ACK && tp->snd_una == tp->snd_max &&
- tp->t_timer[TCPT_REXMT] == 0) {
- svc_flags |= PKT_SCF_TCP_ACK;
+ (inp->inp_last_outifp->if_eflags &
+ (IFEF_TXSTART | IFEF_NOACKPRI)) == IFEF_TXSTART) {
+ if (th->th_flags == TH_ACK &&
+ tp->snd_una == tp->snd_max &&
+ tp->t_timer[TCPT_REXMT] == 0)
+ svc_flags |= PKT_SCF_TCP_ACK;
+ if (th->th_flags & TH_SYN)
+ svc_flags |= PKT_SCF_TCP_SYN;
}
- set_packet_service_class(m, so, MBUF_SC_UNSPEC, svc_flags);
+ set_packet_service_class(m, so, sotc, svc_flags);
+ } else {
+ /*
+ * Optimization for loopback just set the mbuf
+ * service class
+ */
+ (void) m_set_service_class(m, so_tc2msc(sotc));
}
+ TCP_LOG_TH_FLAGS(isipv6 ? (void *)ip6 : (void *)ip, th, tp, true,
+ inp->inp_last_outifp != NULL ? inp->inp_last_outifp :
+ inp->inp_boundifp);
+
tp->t_pktlist_sentlen += len;
tp->t_lastchain++;
tp->t_pktlist_head = tp->t_pktlist_tail = m;
}
- if ((lro_ackmore) && (!sackoptlen) && (!tp->t_timer[TCPT_PERSIST]) &&
- ((th->th_flags & TH_ACK) == TH_ACK) && (!len) &&
- (tp->t_state == TCPS_ESTABLISHED)) {
- /* For a pure ACK, see if you need to send more of them */
+ if (lro_ackmore && !sackoptlen && tp->t_timer[TCPT_PERSIST] == 0 &&
+ (th->th_flags & TH_ACK) == TH_ACK && len == 0 &&
+ tp->t_state == TCPS_ESTABLISHED) {
+ /* For a pure ACK, see if you need to send more of them */
mnext = tcp_send_lroacks(tp, m, th);
if (mnext) {
tp->t_pktlist_tail->m_nextpkt = mnext;
if (sendalot == 0 || (tp->t_state != TCPS_ESTABLISHED) ||
(tp->snd_cwnd <= (tp->snd_wnd / 8)) ||
- (tp->t_flags & (TH_PUSH | TF_ACKNOW)) ||
+ (tp->t_flags & TF_ACKNOW) ||
(tp->t_flagsext & TF_FORCE) ||
tp->t_lastchain >= tcp_packet_chaining) {
error = 0;
error = tcp_ip_output(so, tp, packetlist,
packchain_listadd, tp_inp_options,
(so_options & SO_DONTROUTE),
- (sack_rxmit | (sack_bytes_rxmt != 0)), recwin,
-#if INET6
- isipv6);
-#else /* INET6 */
- 0);
-#endif /* !INET6 */
+ (sack_rxmit || (sack_bytes_rxmt != 0)), isipv6);
if (error) {
/*
* Take into account the rest of unsent
(tp->t_flags & TF_CLOSING)) {
tp->t_flags &= ~TF_CLOSING;
(void) tcp_close(tp);
- return (0);
+ return 0;
}
} else {
error = 0;
TCP_PKTLIST_CLEAR(tp);
if (error == ENOBUFS) {
- if (!tp->t_timer[TCPT_REXMT] &&
- !tp->t_timer[TCPT_PERSIST])
- tp->t_timer[TCPT_REXMT] =
+ /*
+ * Set retransmit timer if not currently set
+ * when we failed to send a segment that can be
+ * retransmitted (i.e. not pure ack or rst)
+ */
+ if (tp->t_timer[TCPT_REXMT] == 0 &&
+ tp->t_timer[TCPT_PERSIST] == 0 &&
+ (len != 0 || (flags & (TH_SYN | TH_FIN)) != 0 ||
+ so->so_snd.sb_cc > 0))
+ tp->t_timer[TCPT_REXMT] =
OFFSET_FROM_START(tp, tp->t_rxtcur);
tp->snd_cwnd = tp->t_maxseg;
tp->t_bytes_acked = 0;
KERNEL_DEBUG(DBG_FNC_TCP_OUTPUT | DBG_FUNC_END, 0,0,0,0,0);
tcp_ccdbg_trace(tp, NULL, TCP_CC_OUTPUT_ERROR);
- return (0);
+ return 0;
}
if (error == EMSGSIZE) {
/*
* treat EHOSTUNREACH/ENETDOWN as a soft error.
*/
if ((error == EHOSTUNREACH || error == ENETDOWN) &&
- TCPS_HAVERCVDSYN(tp->t_state) &&
+ TCPS_HAVERCVDSYN(tp->t_state) &&
!inp_restricted_send(inp, inp->inp_last_outifp)) {
tp->t_softerror = error;
error = 0;
}
tcp_check_timer_state(tp);
KERNEL_DEBUG(DBG_FNC_TCP_OUTPUT | DBG_FUNC_END, 0,0,0,0,0);
- return (error);
+ return error;
}
tcpstat.tcps_sndtotal++;
goto again;
tcp_check_timer_state(tp);
- return (0);
+
+ return 0;
}
static int
tcp_ip_output(struct socket *so, struct tcpcb *tp, struct mbuf *pkt,
- int cnt, struct mbuf *opt, int flags, int sack_in_progress, int recwin,
- boolean_t isipv6)
+ int cnt, struct mbuf *opt, int flags, int sack_in_progress, boolean_t isipv6)
{
int error = 0;
boolean_t chain;
boolean_t unlocked = FALSE;
boolean_t ifdenied = FALSE;
struct inpcb *inp = tp->t_inpcb;
- struct ip_out_args ipoa =
- { IFSCOPE_NONE, { 0 }, IPOAF_SELECT_SRCIF|IPOAF_BOUND_SRCADDR, 0 };
+ struct ip_out_args ipoa;
struct route ro;
struct ifnet *outif = NULL;
+
+ bzero(&ipoa, sizeof(ipoa));
+ ipoa.ipoa_boundif = IFSCOPE_NONE;
+ ipoa.ipoa_flags = IPOAF_SELECT_SRCIF | IPOAF_BOUND_SRCADDR;
+ ipoa.ipoa_sotc = SO_TC_UNSPEC;
+ ipoa.ipoa_netsvctype = _NET_SERVICE_TYPE_UNSPEC;
#if INET6
- struct ip6_out_args ip6oa =
- { IFSCOPE_NONE, { 0 }, IP6OAF_SELECT_SRCIF|IP6OAF_BOUND_SRCADDR, 0 };
+ struct ip6_out_args ip6oa;
struct route_in6 ro6;
+
+ bzero(&ip6oa, sizeof(ip6oa));
+ ip6oa.ip6oa_boundif = IFSCOPE_NONE;
+ ip6oa.ip6oa_flags = IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR;
+ ip6oa.ip6oa_sotc = SO_TC_UNSPEC;
+ ip6oa.ip6oa_netsvctype = _NET_SERVICE_TYPE_UNSPEC;
+
struct flowadv *adv =
(isipv6 ? &ip6oa.ip6oa_flowadv : &ipoa.ipoa_flowadv);
#else /* INET6 */
else
#endif /* INET6 */
ipoa.ipoa_flags |= IPOAF_NO_CELLULAR;
- }
+ }
if (INP_NO_EXPENSIVE(inp)) {
#if INET6
if (isipv6)
else
#endif /* INET6 */
ipoa.ipoa_flags |= IPOAF_NO_EXPENSIVE;
-
+
+ }
+ if (INP_NO_CONSTRAINED(inp)) {
+#if INET6
+ if (isipv6)
+ ip6oa.ip6oa_flags |= IP6OAF_NO_CONSTRAINED;
+ else
+#endif /* INET6 */
+ ipoa.ipoa_flags |= IPOAF_NO_CONSTRAINED;
}
if (INP_AWDL_UNRESTRICTED(inp)) {
#if INET6
else
#endif /* INET6 */
ipoa.ipoa_flags |= IPOAF_AWDL_UNRESTRICTED;
-
+
+ }
+#if INET6
+ if (INP_INTCOPROC_ALLOWED(inp) && isipv6) {
+ ip6oa.ip6oa_flags |= IP6OAF_INTCOPROC_ALLOWED;
+ }
+ if (isipv6) {
+ ip6oa.ip6oa_sotc = so->so_traffic_class;
+ ip6oa.ip6oa_netsvctype = so->so_netsvctype;
+ } else
+#endif /* INET6 */
+ {
+ ipoa.ipoa_sotc = so->so_traffic_class;
+ ipoa.ipoa_netsvctype = so->so_netsvctype;
+ }
+ if ((so->so_flags1 & SOF1_QOSMARKING_ALLOWED)) {
+#if INET6
+ if (isipv6)
+ ip6oa.ip6oa_flags |= IP6OAF_QOSMARKING_ALLOWED;
+ else
+#endif /* INET6 */
+ ipoa.ipoa_flags |= IPOAF_QOSMARKING_ALLOWED;
}
#if INET6
if (isipv6)
inp_route_copyout(inp, &ro);
/*
- * Data sent (as far as we can tell).
- * If this advertises a larger window than any other segment,
- * then remember the size of the advertised window.
* Make sure ACK/DELACK conditions are cleared before
* we unlock the socket.
*/
- if (recwin > 0 && SEQ_GT(tp->rcv_nxt + recwin, tp->rcv_adv))
- tp->rcv_adv = tp->rcv_nxt + recwin;
tp->last_ack_sent = tp->rcv_nxt;
tp->t_flags &= ~(TF_ACKNOW | TF_DELACK);
tp->t_timer[TCPT_DELACK] = 0;
*/
if (tcp_output_unlocked && !so->so_upcallusecount &&
(tp->t_state == TCPS_ESTABLISHED) && (sack_in_progress == 0) &&
- !IN_FASTRECOVERY(tp)) {
+ !IN_FASTRECOVERY(tp) && !(so->so_flags & SOF_MP_SUBFLOW)) {
unlocked = TRUE;
socket_unlock(so, 0);
}
-
+
/*
* Don't send down a chain of packets when:
* - TCP chaining is disabled
#endif
; // I'm important, not extraneous
-
while (pkt != NULL) {
struct mbuf *npkt = pkt->m_nextpkt;
/*
* If we are not chaining, make sure to set the packet
* list count to 0 so that IP takes the right path;
- * this is important for cases such as IPSec where a
+ * this is important for cases such as IPsec where a
* single mbuf might result in multiple mbufs as part
* of the encapsulation. If a non-zero count is passed
* down to IP, the head of the chain might change and
if (unlocked)
socket_lock(so, 0);
- /*
+ /*
* Enter flow controlled state if the connection is established
- * and is not in recovery.
+ * and is not in recovery. Flow control is allowed only if there
+ * is outstanding data.
*
- * A connection will enter suspended state even if it is in
+ * A connection will enter suspended state even if it is in
* recovery.
*/
if (((adv->code == FADV_FLOW_CONTROLLED && !IN_FASTRECOVERY(tp)) ||
- adv->code == FADV_SUSPENDED) &&
+ adv->code == FADV_SUSPENDED) &&
!(tp->t_flags & TF_CLOSING) &&
- tp->t_state == TCPS_ESTABLISHED) {
+ tp->t_state == TCPS_ESTABLISHED &&
+ SEQ_GT(tp->snd_max, tp->snd_una)) {
int rc;
rc = inp_set_fc_state(inp, adv->code);
- if (rc == 1)
- tcp_ccdbg_trace(tp, NULL,
+ if (rc == 1)
+ tcp_ccdbg_trace(tp, NULL,
((adv->code == FADV_FLOW_CONTROLLED) ?
TCP_CC_FLOW_CONTROL : TCP_CC_SUSPEND));
}
- /*
+ /*
* When an interface queue gets suspended, some of the
* packets are dropped. Return ENOBUFS, to update the
* pcb state.
error = ENOBUFS;
VERIFY(inp->inp_sndinprog_cnt > 0);
- if ( --inp->inp_sndinprog_cnt == 0)
+ if ( --inp->inp_sndinprog_cnt == 0) {
inp->inp_flags &= ~(INP_FC_FEEDBACK);
+ if (inp->inp_sndingprog_waiters > 0) {
+ wakeup(&inp->inp_sndinprog_cnt);
+ }
+ }
#if INET6
if (isipv6) {
- if (ro6.ro_rt != NULL && (outif = ro6.ro_rt->rt_ifp) !=
- inp->in6p_last_outifp)
- inp->in6p_last_outifp = outif;
+ /*
+ * When an NECP IP tunnel policy forces the outbound interface,
+ * ip6_output_list() informs the transport layer what is the actual
+ * outgoing interface
+ */
+ if (ip6oa.ip6oa_flags & IP6OAF_BOUND_IF) {
+ outif = ifindex2ifnet[ip6oa.ip6oa_boundif];
+ } else if (ro6.ro_rt != NULL) {
+ outif = ro6.ro_rt->rt_ifp;
+ }
} else
#endif /* INET6 */
- if (ro.ro_rt != NULL && (outif = ro.ro_rt->rt_ifp) !=
- inp->inp_last_outifp)
- inp->inp_last_outifp = outif;
+ if (ro.ro_rt != NULL)
+ outif = ro.ro_rt->rt_ifp;
+
+ if (outif != NULL && outif != inp->inp_last_outifp) {
+ /* Update the send byte count */
+ if (so->so_snd.sb_cc > 0 && so->so_snd.sb_flags & SB_SNDBYTE_CNT) {
+ inp_decr_sndbytes_total(so, so->so_snd.sb_cc);
+ inp_decr_sndbytes_allunsent(so, tp->snd_una);
+ so->so_snd.sb_flags &= ~SB_SNDBYTE_CNT;
+ }
+ inp->inp_last_outifp = outif;
- if (error != 0 && ifdenied &&
- (INP_NO_CELLULAR(inp) || INP_NO_EXPENSIVE(inp)))
- soevent(inp->inp_socket,
+ }
+
+ if (error != 0 && ifdenied &&
+ (INP_NO_CELLULAR(inp) || INP_NO_EXPENSIVE(inp) || INP_NO_CONSTRAINED(inp)))
+ soevent(so,
(SO_FILT_HINT_LOCKED|SO_FILT_HINT_IFDENIED));
/* Synchronize cached PCB route & options */
#endif /* INET6 */
inp_route_copyin(inp, &ro);
- if (tp->t_state < TCPS_ESTABLISHED && tp->t_rxtshift == 0 &&
+ if (tp->t_state < TCPS_ESTABLISHED && tp->t_rxtshift == 0 &&
tp->t_inpcb->inp_route.ro_rt != NULL) {
/* If we found the route and there is an rtt on it
* reset the retransmit timer
tcp_getrt_rtt(tp, tp->t_inpcb->in6p_route.ro_rt);
tp->t_timer[TCPT_REXMT] = OFFSET_FROM_START(tp, tp->t_rxtcur);
}
- return (error);
+ return error;
}
+int tcptv_persmin_val = TCPTV_PERSMIN;
+
void
-tcp_setpersist(tp)
- register struct tcpcb *tp;
+tcp_setpersist(struct tcpcb *tp)
{
int t = ((tp->t_srtt >> 2) + tp->t_rttvar) >> 1;
* see rdar://5805356
*/
- if ((tp->t_persist_timeout != 0) &&
- (tp->t_timer[TCPT_PERSIST] == 0) &&
- (tp->t_persist_stop == 0)) {
+ if (tp->t_persist_timeout != 0 &&
+ tp->t_timer[TCPT_PERSIST] == 0 &&
+ tp->t_persist_stop == 0) {
tp->t_persist_stop = tcp_now + tp->t_persist_timeout;
}
*/
TCPT_RANGESET(tp->t_timer[TCPT_PERSIST],
t * tcp_backoff[tp->t_rxtshift],
- TCPTV_PERSMIN, TCPTV_PERSMAX, 0);
+ tcptv_persmin_val, TCPTV_PERSMAX, 0);
tp->t_timer[TCPT_PERSIST] = OFFSET_FROM_START(tp, tp->t_timer[TCPT_PERSIST]);
if (tp->t_rxtshift < TCP_MAXRXTSHIFT)
int count = 0;
tcp_seq org_ack = ntohl(th->th_ack);
tcp_seq prev_ack = 0;
- int tack_offset = 28; /* XXX IPv6 and IP options not supported */
- int twin_offset = 34; /* XXX IPv6 and IP options not supported */
+ int tack_offset = 28; /* IPv6 and IP options not supported */
+ int twin_offset = 34; /* IPv6 and IP options not supported */
int ack_size = (tp->t_flags & TF_STRETCHACK) ?
(maxseg_unacked * tp->t_maxseg) : (tp->t_maxseg << 1);
int segs_acked = (tp->t_flags & TF_STRETCHACK) ? maxseg_unacked : 2;
tcp_recv_throttle (struct tcpcb *tp)
{
uint32_t base_rtt, newsize;
- int32_t qdelay;
struct sockbuf *sbrcv = &tp->t_inpcb->inp_socket->so_rcv;
if (tcp_use_rtt_recvbg == 1 &&
TSTMP_SUPPORTED(tp)) {
- /*
+ /*
* Timestamps are supported on this connection. Use
* RTT to look for an increase in latency.
*/
- /*
+ /*
* If the connection is already being throttled, leave it
* in that state until rtt comes closer to base rtt
*/
if (tp->t_flagsext & TF_RECV_THROTTLE)
- return (1);
+ return 1;
base_rtt = get_base_rtt(tp);
-
+
if (base_rtt != 0 && tp->t_rttcur != 0) {
- qdelay = tp->t_rttcur - base_rtt;
/*
* if latency increased on a background flow,
* return 1 to start throttling.
*/
- if (qdelay > target_qdelay) {
+ if (tp->t_rttcur > (base_rtt + target_qdelay)) {
tp->t_flagsext |= TF_RECV_THROTTLE;
-
+ if (tp->t_recv_throttle_ts == 0)
+ tp->t_recv_throttle_ts = tcp_now;
/*
* Reduce the recv socket buffer size to
* minimize latecy.
*/
- if (sbrcv->sb_idealsize >
+ if (sbrcv->sb_idealsize >
tcp_recv_throttle_minwin) {
newsize = sbrcv->sb_idealsize >> 1;
/* Set a minimum of 16 K */
- newsize =
- max(newsize,
+ newsize =
+ max(newsize,
tcp_recv_throttle_minwin);
sbrcv->sb_idealsize = newsize;
}
- return (1);
+ return 1;
} else {
- return (0);
+ return 0;
}
}
}
* measurement. Use IPDV in this case.
*/
if (tp->acc_iaj > tcp_acc_iaj_react_limit)
- return (1);
-
- return (0);
+ return 1;
+
+ return 0;
}
projects / apple / xnu.git / blobdiff