/*
- * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2015 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <kern/locks.h>
#include <kern/zalloc.h>
+#include <dev/random/randomdev.h>
+
#include <net/route.h>
#include <net/if.h>
+#include <net/content_filter.h>
#define tcp_minmssoverload fring
#define _IP_VHL
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcp_cc.h>
+#include <netinet/tcp_cache.h>
#include <kern/thread_call.h>
#if INET6
#endif
#endif /*IPSEC*/
+#if NECP
+#include <net/necp.h>
+#endif /* NECP */
+
#undef tcp_minmssoverload
#if CONFIG_MACF_NET
#include <security/mac_framework.h>
#endif /* MAC_NET */
+#include <corecrypto/ccaes.h>
+#include <libkern/crypto/aes.h>
#include <libkern/crypto/md5.h>
#include <sys/kdebug.h>
#include <mach/sdt.h>
extern int tcp_lq_overflow;
-/* temporary: for testing */
-#if IPSEC
-extern int ipsec_bypass;
-#endif
+extern struct tcptimerlist tcp_timer_list;
+extern struct tcptailq tcp_tw_tailq;
int tcp_mssdflt = TCP_MSS;
SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW | CTLFLAG_LOCKED,
extern int tcp_do_autorcvbuf;
+int tcp_sysctl_fastopenkey(struct sysctl_oid *, void *, int ,
+ struct sysctl_req *);
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, fastopen_key,
+ CTLTYPE_STRING | CTLFLAG_WR,
+ 0 , 0, tcp_sysctl_fastopenkey, "S", "TCP Fastopen key");
+
+/* Current count of half-open TFO connections */
+int tcp_tfo_halfcnt = 0;
+
+/* Maximum of half-open TFO connection backlog */
+int tcp_tfo_backlog = 10;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen_backlog, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_tfo_backlog, 0, "Backlog queue for half-open TFO connections");
+
+int tcp_fastopen = TCP_FASTOPEN_CLIENT | TCP_FASTOPEN_SERVER;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_fastopen, 0, "Enable TCP Fastopen (RFC 7413)");
+
+int tcp_tfo_fallback_min = 10;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, fastopen_fallback_min, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_tfo_fallback_min, 0, "Mininum number of trials without TFO when in fallback mode");
+
/*
* Minimum MSS we accept and use. This prevents DoS attacks where
* we are forced to a ridiculous low MSS like 20 and send hundreds
int tcp_minmss = TCP_MINMSS;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmss, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_minmss , 0, "Minmum TCP Maximum Segment Size");
-
-/*
- * Number of TCP segments per second we accept from remote host
- * before we start to calculate average segment size. If average
- * segment size drops below the minimum TCP MSS we assume a DoS
- * attack and reset+drop the connection. Care has to be taken not to
- * set this value too small to not kill interactive type connections
- * (telnet, SSH) which send many small packets.
- */
-#ifdef FIX_WORKAROUND_FOR_3894301
-__private_extern__ int tcp_minmssoverload = TCP_MINMSSOVERLOAD;
-#else
-__private_extern__ int tcp_minmssoverload = 0;
-#endif
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, minmssoverload, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_minmssoverload , 0, "Number of TCP Segments per Second allowed to"
- "be under the MINMSS Size");
-
-static int tcp_do_rfc1323 = 1;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_do_rfc1323 , 0, "Enable rfc1323 (high performance TCP) extensions");
+int tcp_do_rfc1323 = 1;
+#if (DEVELOPMENT || DEBUG)
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323,
+ CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_do_rfc1323 , 0,
+ "Enable rfc1323 (high performance TCP) extensions");
+#endif /* (DEVELOPMENT || DEBUG) */
// Not used
static int tcp_do_rfc1644 = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD | CTLFLAG_LOCKED,
&tcbinfo.ipi_count, 0, "Number of active PCBs");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, tw_pcbcount,
+ CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcbinfo.ipi_twcount, 0, "Number of pcbs in time-wait state");
+
static int icmp_may_rst = 1;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, icmp_may_rst, CTLFLAG_RW | CTLFLAG_LOCKED, &icmp_may_rst, 0,
"Certain ICMP unreachable messages may abort connections in SYN_SENT");
static int tcp_strict_rfc1948 = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, strict_rfc1948, CTLFLAG_RW | CTLFLAG_LOCKED,
+static int tcp_isn_reseed_interval = 0;
+#if (DEVELOPMENT || DEBUG)
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, strict_rfc1948,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_strict_rfc1948, 0, "Determines if RFC1948 is followed exactly");
-static int tcp_isn_reseed_interval = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, isn_reseed_interval, CTLFLAG_RW | CTLFLAG_LOCKED,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, isn_reseed_interval,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_isn_reseed_interval, 0, "Seconds between reseeding of ISN secret");
-static int tcp_background_io_enabled = 1;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, background_io_enabled, CTLFLAG_RW | CTLFLAG_LOCKED,
- &tcp_background_io_enabled, 0, "Background IO Enabled");
+#endif /* (DEVELOPMENT || DEBUG) */
int tcp_TCPTV_MIN = 100; /* 100ms minimum RTT */
SYSCTL_INT(_net_inet_tcp, OID_AUTO, rtt_min, CTLFLAG_RW | CTLFLAG_LOCKED,
SYSCTL_INT(_net_inet_tcp, OID_AUTO, randomize_ports, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_use_randomport, 0, "Randomize TCP port numbers");
-extern struct tcp_cc_algo tcp_cc_newreno;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, newreno_sockets, CTLFLAG_RD | CTLFLAG_LOCKED,
- &tcp_cc_newreno.num_sockets, 0, "Number of sockets using newreno");
-
-extern struct tcp_cc_algo tcp_cc_ledbat;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, background_sockets, CTLFLAG_RD | CTLFLAG_LOCKED,
- &tcp_cc_ledbat.num_sockets, 0, "Number of sockets using background transport");
-
__private_extern__ int tcp_win_scale = 3;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, win_scale_factor, CTLFLAG_RW | CTLFLAG_LOCKED,
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, win_scale_factor,
+ CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_win_scale, 0, "Window scaling factor");
static void tcp_cleartaocache(void);
static void tcp_notify(struct inpcb *, int);
-static void tcp_cc_init(void);
struct zone *sack_hole_zone;
struct zone *tcp_reass_zone;
struct zone *tcp_bwmeas_zone;
-
-/* The array containing pointers to currently implemented TCP CC algorithms */
-struct tcp_cc_algo* tcp_cc_algo_list[TCP_CC_ALGO_COUNT];
+struct zone *tcp_rxt_seg_zone;
extern int slowlink_wsize; /* window correction for slow links */
extern int path_mtu_discovery;
};
#undef ALIGNMENT
-extern struct inpcbhead time_wait_slots[];
-extern struct tcptimerlist tcp_timer_list;
-
int get_inpcb_str_size(void);
int get_tcp_str_size(void);
static lck_grp_attr_t *tcp_uptime_mtx_grp_attr = NULL; /* mutex group attributes */
int tcp_notsent_lowat_check(struct socket *so);
+static aes_encrypt_ctx tfo_ctx; /* Crypto-context for TFO */
+
+void
+tcp_tfo_gen_cookie(struct inpcb *inp, u_char *out, size_t blk_size)
+{
+ u_char in[CCAES_BLOCK_SIZE];
+#if INET6
+ int isipv6 = inp->inp_vflag & INP_IPV6;
+#endif
+
+ VERIFY(blk_size == CCAES_BLOCK_SIZE);
+
+ bzero(&in[0], CCAES_BLOCK_SIZE);
+ bzero(&out[0], CCAES_BLOCK_SIZE);
+
+#if INET6
+ if (isipv6)
+ memcpy(in, &inp->in6p_faddr, sizeof(struct in6_addr));
+ else
+#endif /* INET6 */
+ memcpy(in, &inp->inp_faddr, sizeof(struct in_addr));
+
+ aes_encrypt_cbc(in, NULL, 1, out, &tfo_ctx);
+}
+
+__private_extern__ int
+tcp_sysctl_fastopenkey(__unused struct sysctl_oid *oidp, __unused void *arg1,
+ __unused int arg2, struct sysctl_req *req)
+{
+ int error = 0;
+ /* TFO-key is expressed as a string in hex format (+1 to account for \0 char) */
+ char keystring[TCP_FASTOPEN_KEYLEN * 2 + 1];
+ u_int32_t key[TCP_FASTOPEN_KEYLEN / sizeof(u_int32_t)];
+ int i;
+
+ /* -1, because newlen is len without the terminating \0 character */
+ if (req->newlen != (sizeof(keystring) - 1)) {
+ error = EINVAL;
+ goto exit;
+ }
+
+ /* sysctl_io_string copies keystring into the oldptr of the sysctl_req.
+ * Make sure everything is zero, to avoid putting garbage in there or
+ * leaking the stack.
+ */
+ bzero(keystring, sizeof(keystring));
+
+ error = sysctl_io_string(req, keystring, sizeof(keystring), 0, NULL);
+ if (error)
+ goto exit;
+
+ for (i = 0; i < (TCP_FASTOPEN_KEYLEN / sizeof(u_int32_t)); i++) {
+ /* We jump over the keystring in 8-character (4 byte in hex) steps */
+ if (sscanf(&keystring[i * 8], "%8x", &key[i]) != 1) {
+ error = EINVAL;
+ goto exit;
+ }
+ }
+
+ aes_encrypt_key128((u_char *)key, &tfo_ctx);
+
+exit:
+ return (error);
+}
int get_inpcb_str_size(void)
{
return sizeof(struct inpcb);
}
-
int get_tcp_str_size(void)
{
return sizeof(struct tcpcb);
int tcp_freeq(struct tcpcb *tp);
+static int scale_to_powerof2(int size);
+
/*
- * Initialize TCP congestion control algorithms.
- */
+ * This helper routine returns one of the following scaled value of size:
+ * 1. Rounded down power of two value of size if the size value passed as
+ * argument is not a power of two and the rounded up value overflows.
+ * OR
+ * 2. Rounded up power of two value of size if the size value passed as
+ * argument is not a power of two and the rounded up value does not overflow
+ * OR
+ * 3. Same value as argument size if it is already a power of two.
+ */
+static int scale_to_powerof2(int size) {
+ /* Handle special case of size = 0 */
+ int ret = size ? size : 1;
+
+ if (!powerof2(ret)) {
+ while(!powerof2(size)) {
+ /*
+ * Clear out least significant
+ * set bit till size is left with
+ * its highest set bit at which point
+ * it is rounded down power of two.
+ */
+ size = size & (size -1);
+ }
-void
-tcp_cc_init(void)
+ /* Check for overflow when rounding up */
+ if (0 == (size << 1)) {
+ ret = size;
+ } else {
+ ret = size << 1;
+ }
+ }
+
+ return ret;
+}
+
+static void
+tcp_tfo_init()
{
- bzero(&tcp_cc_algo_list, sizeof(tcp_cc_algo_list));
- tcp_cc_algo_list[TCP_CC_ALGO_NEWRENO_INDEX] = &tcp_cc_newreno;
- tcp_cc_algo_list[TCP_CC_ALGO_BACKGROUND_INDEX] = &tcp_cc_ledbat;
+ u_char key[TCP_FASTOPEN_KEYLEN];
+
+ read_random(key, sizeof(key));
+ aes_encrypt_key128(key, &tfo_ctx);
}
/*
* Tcp initialization
*/
void
-tcp_init()
+tcp_init(struct protosw *pp, struct domain *dp)
{
+#pragma unused(dp)
+ static int tcp_initialized = 0;
vm_size_t str_size;
- int i;
- struct inpcbinfo *pcbinfo;
-
+ struct inpcbinfo *pcbinfo;
+
+ VERIFY((pp->pr_flags & (PR_INITIALIZED|PR_ATTACHED)) == PR_ATTACHED);
+
+ if (tcp_initialized)
+ return;
+ tcp_initialized = 1;
+
tcp_ccgen = 1;
tcp_cleartaocache();
tcp_keepinit = TCPTV_KEEP_INIT;
tcp_keepidle = TCPTV_KEEP_IDLE;
tcp_keepintvl = TCPTV_KEEPINTVL;
+ tcp_keepcnt = TCPTV_KEEPCNT;
tcp_maxpersistidle = TCPTV_KEEP_IDLE;
tcp_msl = TCPTV_MSL;
read_random(&tcp_now, sizeof(tcp_now));
tcp_now = tcp_now & 0x3fffffff; /* Starts tcp internal clock at a random value */
+ tcp_tfo_init();
+
LIST_INIT(&tcb);
- tcbinfo.listhead = &tcb;
+ tcbinfo.ipi_listhead = &tcb;
+
pcbinfo = &tcbinfo;
+ /*
+ * allocate lock group attribute and group for tcp pcb mutexes
+ */
+ pcbinfo->ipi_lock_grp_attr = lck_grp_attr_alloc_init();
+ pcbinfo->ipi_lock_grp = lck_grp_alloc_init("tcppcb", pcbinfo->ipi_lock_grp_attr);
+
+ /*
+ * allocate the lock attribute for tcp pcb mutexes
+ */
+ pcbinfo->ipi_lock_attr = lck_attr_alloc_init();
+
+ if ((pcbinfo->ipi_lock = lck_rw_alloc_init(pcbinfo->ipi_lock_grp,
+ pcbinfo->ipi_lock_attr)) == NULL) {
+ panic("%s: unable to allocate PCB lock\n", __func__);
+ /* NOTREACHED */
+ }
+
+ if (tcp_tcbhashsize == 0) {
+ /* Set to default */
+ tcp_tcbhashsize = 512;
+ }
+
if (!powerof2(tcp_tcbhashsize)) {
- printf("WARNING: TCB hash size not a power of 2\n");
- tcp_tcbhashsize = 512; /* safe default */
+ int old_hash_size = tcp_tcbhashsize;
+ tcp_tcbhashsize = scale_to_powerof2(tcp_tcbhashsize);
+ /* Lower limit of 16 */
+ if (tcp_tcbhashsize < 16) {
+ tcp_tcbhashsize = 16;
+ }
+ printf("WARNING: TCB hash size not a power of 2, "
+ "scaled from %d to %d.\n",
+ old_hash_size,
+ tcp_tcbhashsize);
}
- tcbinfo.hashsize = tcp_tcbhashsize;
- tcbinfo.hashbase = hashinit(tcp_tcbhashsize, M_PCB, &tcbinfo.hashmask);
- tcbinfo.porthashbase = hashinit(tcp_tcbhashsize, M_PCB,
- &tcbinfo.porthashmask);
+
+ tcbinfo.ipi_hashbase = hashinit(tcp_tcbhashsize, M_PCB, &tcbinfo.ipi_hashmask);
+ tcbinfo.ipi_porthashbase = hashinit(tcp_tcbhashsize, M_PCB,
+ &tcbinfo.ipi_porthashmask);
str_size = P2ROUNDUP(sizeof(struct inp_tp), sizeof(u_int64_t));
- tcbinfo.ipi_zone = (void *) zinit(str_size, 120000*str_size, 8192, "tcpcb");
+ tcbinfo.ipi_zone = zinit(str_size, 120000*str_size, 8192, "tcpcb");
zone_change(tcbinfo.ipi_zone, Z_CALLERACCT, FALSE);
zone_change(tcbinfo.ipi_zone, Z_EXPAND, TRUE);
+ tcbinfo.ipi_gc = tcp_gc;
+ tcbinfo.ipi_timer = tcp_itimer;
+ in_pcbinfo_attach(&tcbinfo);
+
str_size = P2ROUNDUP(sizeof(struct sackhole), sizeof(u_int64_t));
sack_hole_zone = zinit(str_size, 120000*str_size, 8192, "sack_hole zone");
zone_change(sack_hole_zone, Z_CALLERACCT, FALSE);
zone_change(sack_hole_zone, Z_EXPAND, TRUE);
- tcp_reass_maxseg = nmbclusters / 16;
str_size = P2ROUNDUP(sizeof(struct tseg_qent), sizeof(u_int64_t));
- tcp_reass_zone = zinit(str_size, (tcp_reass_maxseg + 1) * str_size,
+ tcp_reass_zone = zinit(str_size, (nmbclusters >> 4) * str_size,
0, "tcp_reass_zone");
if (tcp_reass_zone == NULL) {
panic("%s: failed allocating tcp_reass_zone", __func__);
zone_change(tcp_bwmeas_zone, Z_CALLERACCT, FALSE);
zone_change(tcp_bwmeas_zone, Z_EXPAND, TRUE);
+ str_size = P2ROUNDUP(sizeof(struct tcp_ccstate), sizeof(u_int64_t));
+ tcp_cc_zone = zinit(str_size, 20000 * str_size, 0, "tcp_cc_zone");
+ zone_change(tcp_cc_zone, Z_CALLERACCT, FALSE);
+ zone_change(tcp_cc_zone, Z_EXPAND, TRUE);
+
+ str_size = P2ROUNDUP(sizeof(struct tcp_rxt_seg), sizeof(u_int64_t));
+ tcp_rxt_seg_zone = zinit(str_size, 10000 * str_size, 0,
+ "tcp_rxt_seg_zone");
+ zone_change(tcp_rxt_seg_zone, Z_CALLERACCT, FALSE);
+ zone_change(tcp_rxt_seg_zone, Z_EXPAND, TRUE);
+
#if INET6
#define TCP_MINPROTOHDR (sizeof(struct ip6_hdr) + sizeof(struct tcphdr))
#else /* INET6 */
_max_protohdr = TCP_MINPROTOHDR;
_max_protohdr = max_protohdr; /* round it up */
}
- if (max_linkhdr + max_protohdr > MHLEN)
+ if (max_linkhdr + max_protohdr > MCLBYTES)
panic("tcp_init");
#undef TCP_MINPROTOHDR
- /*
- * allocate lock group attribute and group for tcp pcb mutexes
- */
- pcbinfo->mtx_grp_attr = lck_grp_attr_alloc_init();
- pcbinfo->mtx_grp = lck_grp_alloc_init("tcppcb", pcbinfo->mtx_grp_attr);
-
- /*
- * allocate the lock attribute for tcp pcb mutexes
- */
- pcbinfo->mtx_attr = lck_attr_alloc_init();
-
- if ((pcbinfo->mtx = lck_rw_alloc_init(pcbinfo->mtx_grp, pcbinfo->mtx_attr)) == NULL) {
- printf("tcp_init: mutex not alloced!\n");
- return; /* pretty much dead if this fails... */
- }
-
- for (i=0; i < N_TIME_WAIT_SLOTS; i++) {
- LIST_INIT(&time_wait_slots[i]);
- }
+ /* Initialize time wait and timer lists */
+ TAILQ_INIT(&tcp_tw_tailq);
bzero(&tcp_timer_list, sizeof(tcp_timer_list));
LIST_INIT(&tcp_timer_list.lhead);
if ((tcp_timer_list.mtx = lck_mtx_alloc_init(tcp_timer_list.mtx_grp, tcp_timer_list.mtx_attr)) == NULL) {
panic("failed to allocate memory for tcp_timer_list.mtx\n");
};
- tcp_timer_list.fast_quantum = TCP_FASTTIMER_QUANTUM;
- tcp_timer_list.slow_quantum = TCP_SLOWTIMER_QUANTUM;
if ((tcp_timer_list.call = thread_call_allocate(tcp_run_timerlist, NULL)) == NULL) {
panic("failed to allocate call entry 1 in tcp_init\n");
}
tcp_uptime_mtx_attr = lck_attr_alloc_init();
tcp_uptime_lock = lck_spin_alloc_init(tcp_uptime_mtx_grp, tcp_uptime_mtx_attr);
- /* Initialize TCP congestion control algorithms list */
- tcp_cc_init();
-
/* Initialize TCP LRO data structures */
tcp_lro_init();
+
+ /* Initialize TCP Cache */
+ tcp_cache_init();
+
+ /*
+ * If more than 60 MB of mbuf pool is available, increase the
+ * maximum allowed receive and send socket buffer size.
+ */
+ if (nmbclusters > 30720) {
+ tcp_autorcvbuf_max = 1024 * 1024;
+ tcp_autosndbuf_max = 1024 * 1024;
+ }
}
/*
ip6 = (struct ip6_hdr *)ip_ptr;
ip6->ip6_flow = (ip6->ip6_flow & ~IPV6_FLOWINFO_MASK) |
- (inp->in6p_flowinfo & IPV6_FLOWINFO_MASK);
+ (inp->inp_flow & IPV6_FLOWINFO_MASK);
ip6->ip6_vfc = (ip6->ip6_vfc & ~IPV6_VERSION_MASK) |
(IPV6_VERSION & IPV6_VERSION_MASK);
ip6->ip6_nxt = IPPROTO_TCP;
ip6->ip6_plen = sizeof(struct tcphdr);
ip6->ip6_src = inp->in6p_laddr;
ip6->ip6_dst = inp->in6p_faddr;
- tcp_hdr->th_sum = in6_cksum_phdr(&inp->in6p_laddr,
- &inp->in6p_faddr, htonl(sizeof(struct tcphdr)),
- htonl(IPPROTO_TCP));
+ tcp_hdr->th_sum = in6_pseudo(&inp->in6p_laddr, &inp->in6p_faddr,
+ htonl(sizeof (struct tcphdr) + IPPROTO_TCP));
} else
#endif
{
* NOTE: If m != NULL, then ti must point to *inside* the mbuf.
*/
void
-tcp_respond(
- struct tcpcb *tp,
- void *ipgen,
- register struct tcphdr *th,
- register struct mbuf *m,
- tcp_seq ack,
- tcp_seq seq,
- int flags,
- unsigned int ifscope,
- unsigned int nocell
- )
+tcp_respond(struct tcpcb *tp, void *ipgen, struct tcphdr *th, struct mbuf *m,
+ tcp_seq ack, tcp_seq seq, int flags, struct tcp_respond_args *tra)
{
- register int tlen;
+ int tlen;
int win = 0;
struct route *ro = 0;
struct route sro;
m->m_data += max_linkhdr;
#if INET6
if (isipv6) {
+ VERIFY((MHLEN - max_linkhdr) >=
+ (sizeof (*ip6) + sizeof (*nth)));
bcopy((caddr_t)ip6, mtod(m, caddr_t),
sizeof(struct ip6_hdr));
ip6 = mtod(m, struct ip6_hdr *);
} else
#endif /* INET6 */
{
+ VERIFY((MHLEN - max_linkhdr) >=
+ (sizeof (*ip) + sizeof (*nth)));
bcopy((caddr_t)ip, mtod(m, caddr_t), sizeof(struct ip));
ip = mtod(m, struct ip *);
nth = (struct tcphdr *)(void *)(ip + 1);
}
bcopy((caddr_t)th, (caddr_t)nth, sizeof(struct tcphdr));
+#if MPTCP
+ if ((tp) && (tp->t_mpflags & TMPF_RESET))
+ flags = (TH_RST | TH_ACK);
+ else
+#endif
flags = TH_ACK;
} else {
m_freem(m->m_next);
#if INET6
if (isipv6) {
nth->th_sum = 0;
- nth->th_sum = in6_cksum_phdr(&ip6->ip6_src,
- &ip6->ip6_dst, htons((u_short)(tlen - sizeof(struct ip6_hdr))),
- htonl(IPPROTO_TCP));
+ nth->th_sum = in6_pseudo(&ip6->ip6_src, &ip6->ip6_dst,
+ htonl((tlen - sizeof (struct ip6_hdr)) + IPPROTO_TCP));
m->m_pkthdr.csum_flags = CSUM_TCPIPV6;
m->m_pkthdr.csum_data = offsetof(struct tcphdr, th_sum);
ip6->ip6_hlim = in6_selecthlim(tp ? tp->t_inpcb : NULL,
if (tp == NULL || (tp->t_inpcb->inp_socket->so_options & SO_DEBUG))
tcp_trace(TA_OUTPUT, 0, tp, mtod(m, void *), th, 0);
#endif
+
+#if NECP
+ necp_mark_packet_from_socket(m, tp ? tp->t_inpcb : NULL, 0, 0);
+#endif /* NECP */
+
#if IPSEC
- if (ipsec_bypass == 0 && ipsec_setsocket(m, tp ? tp->t_inpcb->inp_socket : NULL) != 0) {
+ if (tp != NULL && tp->t_inpcb->inp_sp != NULL &&
+ ipsec_setsocket(m, tp ? tp->t_inpcb->inp_socket : NULL) != 0) {
m_freem(m);
return;
}
MBUF_SC_UNSPEC, svc_flags);
/* Embed flowhash and flow control flags */
- m->m_pkthdr.m_flowhash = tp->t_inpcb->inp_flowhash;
- m->m_pkthdr.m_fhflags |=
- (PF_TAG_TCP | PF_TAG_FLOWHASH | PF_TAG_FLOWADV);
+ m->m_pkthdr.pkt_flowsrc = FLOWSRC_INPCB;
+ m->m_pkthdr.pkt_flowid = tp->t_inpcb->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_proto = IPPROTO_TCP;
}
#if INET6
if (isipv6) {
- struct ip6_out_args ip6oa = { ifscope, { 0 },
- IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR };
+ struct ip6_out_args ip6oa = { tra->ifscope, { 0 },
+ IP6OAF_SELECT_SRCIF | IP6OAF_BOUND_SRCADDR, 0 };
- if (ifscope != IFSCOPE_NONE)
+ if (tra->ifscope != IFSCOPE_NONE)
ip6oa.ip6oa_flags |= IP6OAF_BOUND_IF;
- if (nocell)
+ if (tra->nocell)
ip6oa.ip6oa_flags |= IP6OAF_NO_CELLULAR;
+ if (tra->noexpensive)
+ ip6oa.ip6oa_flags |= IP6OAF_NO_EXPENSIVE;
+ if (tra->awdl_unrestricted)
+ ip6oa.ip6oa_flags |= IP6OAF_AWDL_UNRESTRICTED;
(void) ip6_output(m, NULL, ro6, IPV6_OUTARGS, NULL,
NULL, &ip6oa);
- if (ro6->ro_rt != NULL) {
- if (ro6 == &sro6) {
- rtfree(ro6->ro_rt);
- ro6->ro_rt = NULL;
- } else if ((outif = ro6->ro_rt->rt_ifp) !=
- tp->t_inpcb->in6p_last_outifp) {
- tp->t_inpcb->in6p_last_outifp = outif;
- }
- }
+
+ if (tp != NULL && ro6 != NULL && ro6->ro_rt != NULL &&
+ (outif = ro6->ro_rt->rt_ifp) !=
+ tp->t_inpcb->in6p_last_outifp)
+ tp->t_inpcb->in6p_last_outifp = outif;
+
+ if (ro6 == &sro6)
+ ROUTE_RELEASE(ro6);
} else
#endif /* INET6 */
{
- struct ip_out_args ipoa = { ifscope, { 0 },
- IPOAF_SELECT_SRCIF | IPOAF_BOUND_SRCADDR };
+ struct ip_out_args ipoa = { tra->ifscope, { 0 },
+ IPOAF_SELECT_SRCIF | IPOAF_BOUND_SRCADDR, 0 };
- if (ifscope != IFSCOPE_NONE)
+ if (tra->ifscope != IFSCOPE_NONE)
ipoa.ipoa_flags |= IPOAF_BOUND_IF;
- if (nocell)
+ if (tra->nocell)
ipoa.ipoa_flags |= IPOAF_NO_CELLULAR;
+ if (tra->noexpensive)
+ ipoa.ipoa_flags |= IPOAF_NO_EXPENSIVE;
+ if (tra->awdl_unrestricted)
+ ipoa.ipoa_flags |= IPOAF_AWDL_UNRESTRICTED;
if (ro != &sro) {
/* Copy the cached route and take an extra reference */
*/
(void) ip_output(m, NULL, &sro, IP_OUTARGS, NULL, &ipoa);
+ if (tp != NULL && sro.ro_rt != NULL &&
+ (outif = sro.ro_rt->rt_ifp) !=
+ tp->t_inpcb->inp_last_outifp)
+ tp->t_inpcb->inp_last_outifp = outif;
+
if (ro != &sro) {
- if (sro.ro_rt != NULL &&
- (outif = sro.ro_rt->rt_ifp) !=
- tp->t_inpcb->inp_last_outifp)
- tp->t_inpcb->inp_last_outifp = outif;
/* Synchronize cached PCB route */
inp_route_copyin(tp->t_inpcb, &sro);
- } else if (sro.ro_rt != NULL) {
- rtfree(sro.ro_rt);
+ } else {
+ ROUTE_RELEASE(&sro);
}
}
}
calculate_tcp_clock();
- if (so->cached_in_sock_layer == 0) {
+ if ((so->so_flags1 & SOF1_CACHED_IN_SOCK_LAYER) == 0) {
it = (struct inp_tp *)(void *)inp;
tp = &it->tcb;
- }
- else
+ } else {
tp = (struct tcpcb *)(void *)inp->inp_saved_ppcb;
+ }
bzero((char *) tp, sizeof(struct tcpcb));
LIST_INIT(&tp->t_segq);
if (tcp_do_rfc1323)
tp->t_flags = (TF_REQ_SCALE|TF_REQ_TSTMP);
- tp->sack_enable = tcp_do_sack;
+ if (tcp_do_sack)
+ tp->t_flagsext |= TF_SACK_ENABLE;
+
TAILQ_INIT(&tp->snd_holes);
+ SLIST_INIT(&tp->t_rxt_segments);
tp->t_inpcb = inp; /* XXX */
/*
* Init srtt to TCPTV_SRTTBASE (0), so we can tell that we have no
tp->t_rttmin = tcp_TCPTV_MIN;
tp->t_rxtcur = TCPTV_RTOBASE;
- /* Initialize congestion control algorithm for this connection
- * to newreno by default
- */
- tp->tcp_cc_index = TCP_CC_ALGO_NEWRENO_INDEX;
- if (CC_ALGO(tp)->init != NULL) {
+ if (tcp_use_newreno)
+ /* use newreno by default */
+ tp->tcp_cc_index = TCP_CC_ALGO_NEWRENO_INDEX;
+ else
+ tp->tcp_cc_index = TCP_CC_ALGO_CUBIC_INDEX;
+
+ tcp_cc_allocate_state(tp);
+
+ if (CC_ALGO(tp)->init != NULL)
CC_ALGO(tp)->init(tp);
- }
- tp->snd_cwnd = TCP_MAXWIN << TCP_MAX_WINSHIFT;
+ tp->snd_cwnd = TCP_CC_CWND_INIT_BYTES;
tp->snd_ssthresh = TCP_MAXWIN << TCP_MAX_WINSHIFT;
tp->snd_ssthresh_prev = TCP_MAXWIN << TCP_MAX_WINSHIFT;
tp->t_rcvtime = tcp_now;
tp->t_persist_timeout = tcp_max_persist_timeout;
tp->t_persist_stop = 0;
tp->t_flagsext |= TF_RCVUNACK_WAITSS;
+ tp->t_rexmtthresh = tcprexmtthresh;
+
+ /* Clear time wait tailq entry */
+ tp->t_twentry.tqe_next = NULL;
+ tp->t_twentry.tqe_prev = NULL;
+
/*
* IPv4 TTL initialization is necessary for an IPv6 socket as well,
* because the socket may be bound to an IPv6 wildcard address,
}
}
+static inline void
+tcp_update_ecn_perf_stats(struct tcpcb *tp,
+ struct if_tcp_ecn_perf_stat *stat)
+{
+ u_int64_t curval, oldval;
+ struct inpcb *inp = tp->t_inpcb;
+ stat->total_txpkts += inp->inp_stat->txpackets;
+ stat->total_rxpkts += inp->inp_stat->rxpackets;
+ stat->total_rxmitpkts += tp->t_stat.rxmitpkts;
+ stat->total_oopkts += tp->t_rcvoopack;
+ stat->total_reorderpkts += (tp->t_reordered_pkts + tp->t_pawsdrop +
+ tp->t_dsack_sent + tp->t_dsack_recvd);
+
+ /* Average RTT */
+ curval = (tp->t_srtt >> TCP_RTT_SHIFT);
+ if (curval > 0 && tp->t_rttupdated >= 16) {
+ if (stat->rtt_avg == 0) {
+ stat->rtt_avg = curval;
+ } else {
+ oldval = stat->rtt_avg;
+ stat->rtt_avg =
+ ((oldval << 4) - oldval + curval) >> 4;
+ }
+ }
+
+ /* RTT variance */
+ curval = tp->t_rttvar >> TCP_RTTVAR_SHIFT;
+ if (curval > 0 && tp->t_rttupdated >= 16) {
+ if (stat->rtt_var == 0) {
+ stat->rtt_var = curval;
+ } else {
+ oldval = stat->rtt_var;
+ stat->rtt_var =
+ ((oldval << 4) - oldval + curval) >> 4;
+ }
+ }
+
+ /* Total number of SACK recovery episodes */
+ stat->sack_episodes += tp->t_sack_recovery_episode;
+
+ if (inp->inp_socket->so_error == ECONNRESET)
+ stat->rst_drop++;
+ return;
+}
+
/*
* Close a TCP control block:
* discard all space held by the tcp
#if INET6
int isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
#endif /* INET6 */
+ struct route *ro;
struct rtentry *rt;
int dosavessthresh;
- if ( inp->inp_ppcb == NULL) /* tcp_close was called previously, bail */
+ /* tcp_close was called previously, bail */
+ if (inp->inp_ppcb == NULL)
return(NULL);
tcp_canceltimers(tp);
return (NULL);
}
- if (CC_ALGO(tp)->cleanup != NULL) {
- CC_ALGO(tp)->cleanup(tp);
- }
+ DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
+ struct tcpcb *, tp, int32_t, TCPS_CLOSED);
#if INET6
- rt = isipv6 ? inp->in6p_route.ro_rt : inp->inp_route.ro_rt;
+ ro = (isipv6 ? (struct route *)&inp->in6p_route : &inp->inp_route);
#else
- rt = inp->inp_route.ro_rt;
+ ro = &inp->inp_route;
#endif
+ rt = ro->ro_rt;
if (rt != NULL)
RT_LOCK_SPIN(rt);
}
else
#endif /* INET6 */
- if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
- ((struct sockaddr_in *)(void *)rt_key(rt))->sin_addr.s_addr ==
- INADDR_ANY || rt->generation_id != route_generation) {
- if (tp->t_state >= TCPS_CLOSE_WAIT) {
- DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
- struct tcpcb *, tp, int32_t, TCPS_CLOSING);
- tp->t_state = TCPS_CLOSING;
- }
+ if (ROUTE_UNUSABLE(ro) ||
+ SIN(rt_key(rt))->sin_addr.s_addr == INADDR_ANY) {
+ DTRACE_TCP4(state__change, void, NULL,
+ struct inpcb *, inp, struct tcpcb *, tp,
+ int32_t, TCPS_CLOSED);
+ tp->t_state = TCPS_CLOSED;
goto no_valid_rt;
}
/* free the reassembly queue, if any */
(void) tcp_freeq(tp);
+ /* Collect ECN related statistics */
+ if (tp->ecn_flags & TE_SETUPSENT) {
+ if (tp->ecn_flags & TE_CLIENT_SETUP) {
+ INP_INC_IFNET_STAT(inp, ecn_client_setup);
+ if (TCP_ECN_ENABLED(tp)) {
+ INP_INC_IFNET_STAT(inp,
+ ecn_client_success);
+ } else if (tp->ecn_flags & TE_LOST_SYN) {
+ INP_INC_IFNET_STAT(inp, ecn_syn_lost);
+ } else {
+ INP_INC_IFNET_STAT(inp,
+ ecn_peer_nosupport);
+ }
+ } else {
+ INP_INC_IFNET_STAT(inp, ecn_server_setup);
+ if (TCP_ECN_ENABLED(tp)) {
+ INP_INC_IFNET_STAT(inp,
+ ecn_server_success);
+ } else if (tp->ecn_flags & TE_LOST_SYNACK) {
+ INP_INC_IFNET_STAT(inp,
+ ecn_synack_lost);
+ } else {
+ INP_INC_IFNET_STAT(inp,
+ ecn_peer_nosupport);
+ }
+ }
+ } else {
+ INP_INC_IFNET_STAT(inp, ecn_off_conn);
+ }
+ if (TCP_ECN_ENABLED(tp)) {
+ if (tp->ecn_flags & TE_RECV_ECN_CE) {
+ tcpstat.tcps_ecn_conn_recv_ce++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_recv_ce);
+ }
+ if (tp->ecn_flags & TE_RECV_ECN_ECE) {
+ tcpstat.tcps_ecn_conn_recv_ece++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_recv_ece);
+ }
+ if (tp->ecn_flags & (TE_RECV_ECN_CE | TE_RECV_ECN_ECE)) {
+ if (tp->t_stat.txretransmitbytes > 0 ||
+ tp->t_stat.rxoutoforderbytes > 0) {
+ tcpstat.tcps_ecn_conn_pl_ce++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_plce);
+ } else {
+ tcpstat.tcps_ecn_conn_nopl_ce++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_noplce);
+ }
+ } else {
+ if (tp->t_stat.txretransmitbytes > 0 ||
+ tp->t_stat.rxoutoforderbytes > 0) {
+ tcpstat.tcps_ecn_conn_plnoce++;
+ INP_INC_IFNET_STAT(inp, ecn_conn_plnoce);
+ }
+ }
+ }
+
+ /* Aggregate performance stats */
+ if (inp->inp_last_outifp != NULL && !(tp->t_flags & TF_LOCAL)) {
+ struct ifnet *ifp = inp->inp_last_outifp;
+ ifnet_lock_shared(ifp);
+ if ((ifp->if_refflags & (IFRF_ATTACHED | IFRF_DETACHING)) ==
+ IFRF_ATTACHED) {
+ if (inp->inp_vflag & INP_IPV6) {
+ ifp->if_ipv6_stat->timestamp = net_uptime();
+ if (TCP_ECN_ENABLED(tp)) {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv6_stat->ecn_on);
+ } else {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv6_stat->ecn_off);
+ }
+ } else {
+ ifp->if_ipv4_stat->timestamp = net_uptime();
+ if (TCP_ECN_ENABLED(tp)) {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv4_stat->ecn_on);
+ } else {
+ tcp_update_ecn_perf_stats(tp,
+ &ifp->if_ipv4_stat->ecn_off);
+ }
+ }
+ }
+ ifnet_lock_done(ifp);
+ }
+
tcp_free_sackholes(tp);
if (tp->t_bwmeas != NULL) {
tcp_bwmeas_free(tp);
}
-
+ tcp_rxtseg_clean(tp);
/* Free the packet list */
if (tp->t_pktlist_head != NULL)
m_freem_list(tp->t_pktlist_head);
TCP_PKTLIST_CLEAR(tp);
-#ifdef __APPLE__
- if (so->cached_in_sock_layer)
+#if MPTCP
+ /* Clear MPTCP state */
+ if ((so->so_flags & SOF_MPTCP_TRUE) ||
+ (so->so_flags & SOF_MP_SUBFLOW)) {
+ soevent(so, (SO_FILT_HINT_LOCKED | SO_FILT_HINT_DELETEOK));
+ }
+ tp->t_mpflags = 0;
+ tp->t_mptcb = NULL;
+#endif /* MPTCP */
+
+ if (so->so_flags1 & SOF1_CACHED_IN_SOCK_LAYER)
inp->inp_saved_ppcb = (caddr_t) tp;
-#endif
+
+ tp->t_state = TCPS_CLOSED;
+
/* Issue a wakeup before detach so that we don't miss
* a wakeup
*/
* Clean up any LRO state
*/
if (tp->t_flagsext & TF_LRO_OFFLOADED) {
- tcp_lro_remove_state(inp->inp_laddr, inp->inp_faddr,
- inp->inp_lport,
- inp->inp_fport);
+ tcp_lro_remove_state(inp->inp_laddr, inp->inp_faddr,
+ inp->inp_lport, inp->inp_fport);
tp->t_flagsext &= ~TF_LRO_OFFLOADED;
}
+ /*
+ * If this is a socket that does not want to wakeup the device
+ * for it's traffic, the application might need to know that the
+ * socket is closed, send a notification.
+ */
+ if ((so->so_options & SO_NOWAKEFROMSLEEP) &&
+ inp->inp_state != INPCB_STATE_DEAD &&
+ !(inp->inp_flags2 & INP2_TIMEWAIT))
+ socket_post_kev_msg_closed(so);
+
+ if (CC_ALGO(tp)->cleanup != NULL) {
+ CC_ALGO(tp)->cleanup(tp);
+ }
+
+ if (tp->t_ccstate != NULL) {
+ zfree(tcp_cc_zone, tp->t_ccstate);
+ tp->t_ccstate = NULL;
+ }
+ tp->tcp_cc_index = TCP_CC_ALGO_NONE;
+
+ /* Can happen if we close the socket before receiving the third ACK */
+ if ((tp->t_tfo_flags & TFO_F_COOKIE_VALID)) {
+ OSDecrementAtomic(&tcp_tfo_halfcnt);
+
+ /* Panic if something has gone terribly wrong. */
+ VERIFY(tcp_tfo_halfcnt >= 0);
+
+ tp->t_tfo_flags &= ~TFO_F_COOKIE_VALID;
+ }
+
#if INET6
- if (INP_CHECK_SOCKAF(so, AF_INET6))
+ if (SOCK_CHECK_DOM(so, PF_INET6))
in6_pcbdetach(inp);
else
#endif /* INET6 */
/* Call soisdisconnected after detach because it might unlock the socket */
soisdisconnected(so);
tcpstat.tcps_closed++;
- KERNEL_DEBUG(DBG_FNC_TCP_CLOSE | DBG_FUNC_END, tcpstat.tcps_closed,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_CLOSE | DBG_FUNC_END,
+ tcpstat.tcps_closed, 0, 0, 0, 0);
return(NULL);
}
LIST_REMOVE(q, tqe_q);
m_freem(q->tqe_m);
zfree(tcp_reass_zone, q);
- tcp_reass_qsize--;
rv = 1;
}
+ tp->t_reassqlen = 0;
return (rv);
}
+
+/*
+ * Walk the tcpbs, if existing, and flush the reassembly queue,
+ * if there is one when do_tcpdrain is enabled
+ * Also defunct the extended background idle socket
+ * Do it next time if the pcbinfo lock is in use
+ */
void
tcp_drain()
{
- if (do_tcpdrain)
- {
- struct inpcb *inpb;
- struct tcpcb *tcpb;
- struct tseg_qent *te;
+ struct inpcb *inp;
+ struct tcpcb *tp;
- /*
- * Walk the tcpbs, if existing, and flush the reassembly queue,
- * if there is one...
- * XXX: The "Net/3" implementation doesn't imply that the TCP
- * reassembly queue should be flushed, but in a situation
- * where we're really low on mbufs, this is potentially
- * usefull.
- */
- if (!lck_rw_try_lock_exclusive(tcbinfo.mtx)) /* do it next time if the lock is in use */
- return;
+ if (!lck_rw_try_lock_exclusive(tcbinfo.ipi_lock))
+ return;
- for (inpb = LIST_FIRST(tcbinfo.listhead); inpb;
- inpb = LIST_NEXT(inpb, inp_list)) {
- if ((tcpb = intotcpcb(inpb))) {
- while ((te = LIST_FIRST(&tcpb->t_segq))
- != NULL) {
- LIST_REMOVE(te, tqe_q);
- m_freem(te->tqe_m);
- zfree(tcp_reass_zone, te);
- tcp_reass_qsize--;
- }
- }
- }
- lck_rw_done(tcbinfo.mtx);
+ LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
+ if (in_pcb_checkstate(inp, WNT_ACQUIRE, 0) !=
+ WNT_STOPUSING) {
+ tcp_lock(inp->inp_socket, 1, 0);
+ if (in_pcb_checkstate(inp, WNT_RELEASE, 1)
+ == WNT_STOPUSING) {
+ /* lost a race, try the next one */
+ tcp_unlock(inp->inp_socket, 1, 0);
+ continue;
+ }
+ tp = intotcpcb(inp);
+
+ if (do_tcpdrain)
+ tcp_freeq(tp);
+ so_drain_extended_bk_idle(inp->inp_socket);
+
+ tcp_unlock(inp->inp_socket, 1, 0);
+ }
}
+ lck_rw_done(tcbinfo.ipi_lock);
+
}
/*
static void
tcpcb_to_otcpcb(struct tcpcb *tp, struct otcpcb *otp)
{
- int i;
-
- otp->t_segq = (u_int32_t)(uintptr_t)tp->t_segq.lh_first;
+ otp->t_segq = (uint32_t)VM_KERNEL_ADDRPERM(tp->t_segq.lh_first);
otp->t_dupacks = tp->t_dupacks;
- for (i = 0; i < TCPT_NTIMERS_EXT; i++)
- otp->t_timer[i] = tp->t_timer[i];
- otp->t_inpcb = (_TCPCB_PTR(struct inpcb *))(uintptr_t)tp->t_inpcb;
+ otp->t_timer[TCPT_REXMT_EXT] = tp->t_timer[TCPT_REXMT];
+ otp->t_timer[TCPT_PERSIST_EXT] = tp->t_timer[TCPT_PERSIST];
+ otp->t_timer[TCPT_KEEP_EXT] = tp->t_timer[TCPT_KEEP];
+ otp->t_timer[TCPT_2MSL_EXT] = tp->t_timer[TCPT_2MSL];
+ otp->t_inpcb = (_TCPCB_PTR(struct inpcb *))VM_KERNEL_ADDRPERM(tp->t_inpcb);
otp->t_state = tp->t_state;
otp->t_flags = tp->t_flags;
- otp->t_force = tp->t_force;
+ otp->t_force = (tp->t_flagsext & TF_FORCE) ? 1 : 0;
otp->snd_una = tp->snd_una;
otp->snd_max = tp->snd_max;
otp->snd_nxt = tp->snd_nxt;
otp->ts_recent = tp->ts_recent;
otp->ts_recent_age = tp->ts_recent_age;
otp->last_ack_sent = tp->last_ack_sent;
- otp->cc_send = tp->cc_send;
- otp->cc_recv = tp->cc_recv;
+ otp->cc_send = 0;
+ otp->cc_recv = 0;
otp->snd_recover = tp->snd_recover;
otp->snd_cwnd_prev = tp->snd_cwnd_prev;
otp->snd_ssthresh_prev = tp->snd_ssthresh_prev;
- otp->t_badrxtwin = tp->t_badrxtwin;
+ otp->t_badrxtwin = 0;
}
static int
tcp_pcblist SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
- int error, i, n;
+ int error, i = 0, n;
struct inpcb *inp, **inp_list;
+ struct tcpcb *tp;
inp_gen_t gencnt;
struct xinpgen xig;
- int slot;
/*
* The process of preparing the TCB list is too time-consuming and
* resource-intensive to repeat twice on every request.
*/
- lck_rw_lock_shared(tcbinfo.mtx);
+ lck_rw_lock_shared(tcbinfo.ipi_lock);
if (req->oldptr == USER_ADDR_NULL) {
n = tcbinfo.ipi_count;
req->oldidx = 2 * (sizeof xig)
+ (n + n/8) * sizeof(struct xtcpcb);
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return 0;
}
if (req->newptr != USER_ADDR_NULL) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return EPERM;
}
xig.xig_sogen = so_gencnt;
error = SYSCTL_OUT(req, &xig, sizeof xig);
if (error) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return error;
}
/*
* We are done if there is no pcb
*/
if (n == 0) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return 0;
}
inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
if (inp_list == 0) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return ENOMEM;
}
- for (inp = LIST_FIRST(tcbinfo.listhead), i = 0; inp && i < n;
- inp = LIST_NEXT(inp, inp_list)) {
-#ifdef __APPLE__
- if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
-#else
- if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->p, inp))
-#endif
+ LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD)
inp_list[i++] = inp;
+ if (i >= n) break;
}
- for (slot = 0; slot < N_TIME_WAIT_SLOTS; slot++) {
- struct inpcb *inpnxt;
-
- for (inp = time_wait_slots[slot].lh_first; inp && i < n; inp = inpnxt) {
- inpnxt = inp->inp_list.le_next;
- if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
- inp_list[i++] = inp;
- }
+ TAILQ_FOREACH(tp, &tcp_tw_tailq, t_twentry) {
+ inp = tp->t_inpcb;
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD)
+ inp_list[i++] = inp;
+ if (i >= n) break;
}
n = i;
error = 0;
for (i = 0; i < n; i++) {
inp = inp_list[i];
- if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD) {
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD) {
struct xtcpcb xt;
caddr_t inp_ppcb;
inpcb_to_compat(inp, &xt.xt_inp);
inp_ppcb = inp->inp_ppcb;
if (inp_ppcb != NULL) {
- tcpcb_to_otcpcb((struct tcpcb *)(void *)inp_ppcb,
+ tcpcb_to_otcpcb(
+ (struct tcpcb *)(void *)inp_ppcb,
&xt.xt_tp);
} else {
bzero((char *) &xt.xt_tp, sizeof xt.xt_tp);
error = SYSCTL_OUT(req, &xig, sizeof xig);
}
FREE(inp_list, M_TEMP);
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return error;
}
-SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist, CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+SYSCTL_PROC(_net_inet_tcp, TCPCTL_PCBLIST, pcblist,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
tcp_pcblist, "S,xtcpcb", "List of active TCP connections");
-#if !CONFIG_EMBEDDED
static void
tcpcb_to_xtcpcb64(struct tcpcb *tp, struct xtcpcb64 *otp)
{
- int i;
-
- otp->t_segq = (u_int32_t)(uintptr_t)tp->t_segq.lh_first;
+ otp->t_segq = (uint32_t)VM_KERNEL_ADDRPERM(tp->t_segq.lh_first);
otp->t_dupacks = tp->t_dupacks;
- for (i = 0; i < TCPT_NTIMERS_EXT; i++)
- otp->t_timer[i] = tp->t_timer[i];
+ otp->t_timer[TCPT_REXMT_EXT] = tp->t_timer[TCPT_REXMT];
+ otp->t_timer[TCPT_PERSIST_EXT] = tp->t_timer[TCPT_PERSIST];
+ otp->t_timer[TCPT_KEEP_EXT] = tp->t_timer[TCPT_KEEP];
+ otp->t_timer[TCPT_2MSL_EXT] = tp->t_timer[TCPT_2MSL];
otp->t_state = tp->t_state;
otp->t_flags = tp->t_flags;
- otp->t_force = tp->t_force;
+ otp->t_force = (tp->t_flagsext & TF_FORCE) ? 1 : 0;
otp->snd_una = tp->snd_una;
otp->snd_max = tp->snd_max;
otp->snd_nxt = tp->snd_nxt;
otp->ts_recent = tp->ts_recent;
otp->ts_recent_age = tp->ts_recent_age;
otp->last_ack_sent = tp->last_ack_sent;
- otp->cc_send = tp->cc_send;
- otp->cc_recv = tp->cc_recv;
+ otp->cc_send = 0;
+ otp->cc_recv = 0;
otp->snd_recover = tp->snd_recover;
otp->snd_cwnd_prev = tp->snd_cwnd_prev;
otp->snd_ssthresh_prev = tp->snd_ssthresh_prev;
- otp->t_badrxtwin = tp->t_badrxtwin;
+ otp->t_badrxtwin = 0;
}
tcp_pcblist64 SYSCTL_HANDLER_ARGS
{
#pragma unused(oidp, arg1, arg2)
- int error, i, n;
+ int error, i = 0, n;
struct inpcb *inp, **inp_list;
+ struct tcpcb *tp;
inp_gen_t gencnt;
struct xinpgen xig;
- int slot;
/*
* The process of preparing the TCB list is too time-consuming and
* resource-intensive to repeat twice on every request.
*/
- lck_rw_lock_shared(tcbinfo.mtx);
+ lck_rw_lock_shared(tcbinfo.ipi_lock);
if (req->oldptr == USER_ADDR_NULL) {
n = tcbinfo.ipi_count;
req->oldidx = 2 * (sizeof xig)
+ (n + n/8) * sizeof(struct xtcpcb64);
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return 0;
}
if (req->newptr != USER_ADDR_NULL) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return EPERM;
}
xig.xig_sogen = so_gencnt;
error = SYSCTL_OUT(req, &xig, sizeof xig);
if (error) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return error;
}
/*
* We are done if there is no pcb
*/
if (n == 0) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return 0;
}
inp_list = _MALLOC(n * sizeof *inp_list, M_TEMP, M_WAITOK);
if (inp_list == 0) {
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return ENOMEM;
}
- for (inp = LIST_FIRST(tcbinfo.listhead), i = 0; inp && i < n;
- inp = LIST_NEXT(inp, inp_list)) {
-#ifdef __APPLE__
- if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
-#else
- if (inp->inp_gencnt <= gencnt && !prison_xinpcb(req->p, inp))
-#endif
+ LIST_FOREACH(inp, tcbinfo.ipi_listhead, inp_list) {
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD)
inp_list[i++] = inp;
+ if (i >= n) break;
}
- for (slot = 0; slot < N_TIME_WAIT_SLOTS; slot++) {
- struct inpcb *inpnxt;
-
- for (inp = time_wait_slots[slot].lh_first; inp && i < n; inp = inpnxt) {
- inpnxt = inp->inp_list.le_next;
- if (inp->inp_gencnt <= gencnt && inp->inp_state != INPCB_STATE_DEAD)
- inp_list[i++] = inp;
- }
+ TAILQ_FOREACH(tp, &tcp_tw_tailq, t_twentry) {
+ inp = tp->t_inpcb;
+ if (inp->inp_gencnt <= gencnt &&
+ inp->inp_state != INPCB_STATE_DEAD)
+ inp_list[i++] = inp;
+ if (i >= n) break;
}
n = i;
bzero(&xt, sizeof(xt));
xt.xt_len = sizeof xt;
inpcb_to_xinpcb64(inp, &xt.xt_inpcb);
- xt.xt_inpcb.inp_ppcb = (u_int64_t)(uintptr_t)inp->inp_ppcb;
+ xt.xt_inpcb.inp_ppcb = (uint64_t)VM_KERNEL_ADDRPERM(inp->inp_ppcb);
if (inp->inp_ppcb != NULL)
tcpcb_to_xtcpcb64((struct tcpcb *)inp->inp_ppcb, &xt);
if (inp->inp_socket)
error = SYSCTL_OUT(req, &xig, sizeof xig);
}
FREE(inp_list, M_TEMP);
- lck_rw_done(tcbinfo.mtx);
+ lck_rw_done(tcbinfo.ipi_lock);
return error;
}
-SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist64, CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist64,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
tcp_pcblist64, "S,xtcpcb64", "List of active TCP connections");
-#endif /* !CONFIG_EMBEDDED */
static int
tcp_pcblist_n SYSCTL_HANDLER_ARGS
}
-SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist_n, CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, pcblist_n,
+ CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_LOCKED, 0, 0,
tcp_pcblist_n, "S,xtcpcb_n", "List of active TCP connections");
__private_extern__ void
-tcp_get_ports_used(unsigned int ifindex, uint8_t *bitfield)
+tcp_get_ports_used(uint32_t ifindex, int protocol, uint32_t flags,
+ bitstr_t *bitfield)
{
- inpcb_get_ports_used(ifindex, bitfield, &tcbinfo);
+ inpcb_get_ports_used(ifindex, protocol, flags,
+ bitfield, &tcbinfo);
}
__private_extern__ uint32_t
return inpcb_count_opportunistic(ifindex, &tcbinfo, flags);
}
+__private_extern__ uint32_t
+tcp_find_anypcb_byaddr(struct ifaddr *ifa)
+{
+ return inpcb_find_anypcb_byaddr(ifa, &tcbinfo);
+}
+
void
tcp_ctlinput(cmd, sa, vip)
int cmd;
if (sa->sa_family != AF_INET || faddr.s_addr == INADDR_ANY)
return;
+ if ((unsigned)cmd >= PRC_NCMDS)
+ return;
+
if (cmd == PRC_MSGSIZE)
notify = tcp_mtudisc;
else if (icmp_may_rst && (cmd == PRC_UNREACH_ADMIN_PROHIB ||
/* Source quench is deprecated */
else if (cmd == PRC_QUENCH)
return;
- else if ((unsigned)cmd > PRC_NCMDS || inetctlerrmap[cmd] == 0)
+ else if (inetctlerrmap[cmd] == 0)
return;
if (ip) {
struct tcphdr th;
sa->sa_len != sizeof(struct sockaddr_in6))
return;
+ if ((unsigned)cmd >= PRC_NCMDS)
+ return;
+
if (cmd == PRC_MSGSIZE)
notify = tcp_mtudisc;
- else if (!PRC_IS_REDIRECT(cmd) &&
- ((unsigned)cmd > PRC_NCMDS || inet6ctlerrmap[cmd] == 0))
+ else if (!PRC_IS_REDIRECT(cmd) && (inet6ctlerrmap[cmd] == 0))
return;
/* Source quench is deprecated */
else if (cmd == PRC_QUENCH)
if (((tp->t_state == TCPS_LISTEN) || (tp->t_state == TCPS_TIME_WAIT))
&& tcp_strict_rfc1948 == 0)
#ifdef __APPLE__
- return random();
+ return RandomULong();
#else
return arc4random();
#endif
struct socket *so = inp->inp_socket;
int offered;
int mss;
+ u_int32_t mtu;
#if INET6
int isipv6 = (tp->t_inpcb->inp_vflag & INP_IPV6) != 0;
#endif /* INET6 */
}
taop = rmx_taop(rt->rt_rmx);
offered = taop->tao_mssopt;
- mss = rt->rt_rmx.rmx_mtu -
+ mtu = rt->rt_rmx.rmx_mtu;
+
+ /* Route locked during lookup above */
+ RT_UNLOCK(rt);
+
+#if NECP
+ // Adjust MTU if necessary.
+ mtu = necp_socket_get_effective_mtu(inp, mtu);
+#endif /* NECP */
+
+ mss = mtu -
#if INET6
(isipv6 ?
sizeof(struct ip6_hdr) + sizeof(struct tcphdr) :
#endif /* INET6 */
;
- /* Route locked during lookup above */
- RT_UNLOCK(rt);
-
if (offered)
mss = min(mss, offered);
/*
(tp->t_flags & TF_RCVD_TSTMP) == TF_RCVD_TSTMP)
mss -= TCPOLEN_TSTAMP_APPA;
+#if MPTCP
+ mss -= mptcp_adj_mss(tp, TRUE);
+#endif
if (so->so_snd.sb_hiwat < mss)
mss = so->so_snd.sb_hiwat;
if ((rt = ro->ro_rt) != NULL)
RT_LOCK(rt);
- if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
- rt->generation_id != route_generation) {
+ if (ROUTE_UNUSABLE(ro)) {
+ if (rt != NULL) {
+ RT_UNLOCK(rt);
+ rt = NULL;
+ }
+ ROUTE_RELEASE(ro);
/* No route yet, so try to acquire one */
if (inp->inp_faddr.s_addr != INADDR_ANY) {
unsigned int ifscope;
ifscope = (inp->inp_flags & INP_BOUND_IF) ?
inp->inp_boundifp->if_index : input_ifscope;
- if (rt != NULL)
- RT_UNLOCK(rt);
rtalloc_scoped(ro, ifscope);
if ((rt = ro->ro_rt) != NULL)
RT_LOCK(rt);
}
}
+ if (rt != NULL)
+ RT_LOCK_ASSERT_HELD(rt);
/*
* Update MTU discovery determination. Don't do it if:
somultipages(inp->inp_socket,
(rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
tcp_set_tso(tp, rt->rt_ifp);
+ soif2kcl(inp->inp_socket,
+ (rt->rt_ifp->if_eflags & IFEF_2KCL));
+ tcp_set_ecn(tp, rt->rt_ifp);
}
+ /* Note if the peer is local */
+ if (rt != NULL && !(rt->rt_ifp->if_flags & IFF_POINTOPOINT) &&
+ (rt->rt_gateway->sa_family == AF_LINK ||
+ rt->rt_ifp->if_flags & IFF_LOOPBACK ||
+ in_localaddr(inp->inp_faddr))) {
+ tp->t_flags |= TF_LOCAL;
+ }
+
/*
* Caller needs to call RT_UNLOCK(rt).
*/
if ((rt = ro6->ro_rt) != NULL)
RT_LOCK(rt);
- if (rt == NULL || !(rt->rt_flags & RTF_UP) ||
- rt->generation_id != route_generation) {
+ if (ROUTE_UNUSABLE(ro6)) {
+ if (rt != NULL) {
+ RT_UNLOCK(rt);
+ rt = NULL;
+ }
+ ROUTE_RELEASE(ro6);
/* No route yet, so try to acquire one */
if (!IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
struct sockaddr_in6 *dst6;
ifscope = (inp->inp_flags & INP_BOUND_IF) ?
inp->inp_boundifp->if_index : input_ifscope;
- if (rt != NULL)
- RT_UNLOCK(rt);
rtalloc_scoped((struct route *)ro6, ifscope);
if ((rt = ro6->ro_rt) != NULL)
RT_LOCK(rt);
}
}
+ if (rt != NULL)
+ RT_LOCK_ASSERT_HELD(rt);
+
/*
* Update path MTU Discovery determination
* while looking up the route:
somultipages(inp->inp_socket,
(rt->rt_ifp->if_hwassist & IFNET_MULTIPAGES));
tcp_set_tso(tp, rt->rt_ifp);
+ soif2kcl(inp->inp_socket,
+ (rt->rt_ifp->if_eflags & IFEF_2KCL));
+ tcp_set_ecn(tp, rt->rt_ifp);
+ }
+
+ /* Note if the peer is local */
+ if (rt != NULL && !(rt->rt_ifp->if_flags & IFF_POINTOPOINT) &&
+ (IN6_IS_ADDR_LOOPBACK(&inp->in6p_faddr) ||
+ IN6_IS_ADDR_LINKLOCAL(&inp->in6p_faddr) ||
+ rt->rt_gateway->sa_family == AF_LINK ||
+ in6_localaddr(&inp->in6p_faddr))) {
+ tp->t_flags |= TF_LOCAL;
}
/*
lr_saved = lr;
#ifdef MORE_TCPLOCK_DEBUG
- printf("tcp_unlock: so=%p sopcb=%p lock=%p ref=%x lr=%p\n",
- so, so->so_pcb, &((struct inpcb *)so->so_pcb)->inpcb_mtx,
- so->so_usecount, lr_saved);
+ printf("tcp_unlock: so=0x%llx sopcb=0x%llx lock=0x%llx ref=%x "
+ "lr=0x%llx\n", (uint64_t)VM_KERNEL_ADDRPERM(so),
+ (uint64_t)VM_KERNEL_ADDRPERM(so->so_pcb),
+ (uint64_t)VM_KERNEL_ADDRPERM(&(sotoinpcb(so)->inpcb_mtx)),
+ so->so_usecount, (uint64_t)VM_KERNEL_ADDRPERM(lr_saved));
#endif
if (refcount)
so->so_usecount--;
}
}
-/* Determine if we can grow the recieve socket buffer to avoid sending
+/*
+ * Determine if we can grow the recieve socket buffer to avoid sending
* a zero window update to the peer. We allow even socket buffers that
* have fixed size (set by the application) to grow if the resource
* constraints are met. They will also be trimmed after the application
* reads data.
*/
static void
-tcp_sbrcv_grow_rwin(struct tcpcb *tp, struct sockbuf *sb) {
- u_int32_t rcvbufinc = tp->t_maxseg << tcp_autorcvbuf_inc_shift;
+tcp_sbrcv_grow_rwin(struct tcpcb *tp, struct sockbuf *sb)
+{
+ u_int32_t rcvbufinc = tp->t_maxseg << 4;
+ u_int32_t rcvbuf = sb->sb_hiwat;
+ struct socket *so = tp->t_inpcb->inp_socket;
+
+ /*
+ * If message delivery is enabled, do not count
+ * unordered bytes in receive buffer towards hiwat
+ */
+ if (so->so_flags & SOF_ENABLE_MSGS)
+ rcvbuf = rcvbuf - so->so_msg_state->msg_uno_bytes;
+
if (tcp_do_autorcvbuf == 1 &&
tcp_cansbgrow(sb) &&
(tp->t_flags & TF_SLOWLINK) == 0 &&
- (sb->sb_hiwat - sb->sb_cc) < rcvbufinc &&
- (sb->sb_hiwat < tcp_autorcvbuf_max)) {
- sbreserve(sb, (sb->sb_hiwat + rcvbufinc));
+ (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) == 0 &&
+ (rcvbuf - sb->sb_cc) < rcvbufinc &&
+ rcvbuf < tcp_autorcvbuf_max &&
+ (sb->sb_idealsize > 0 &&
+ sb->sb_hiwat <= (sb->sb_idealsize + rcvbufinc))) {
+ sbreserve(sb,
+ min((sb->sb_hiwat + rcvbufinc), tcp_autorcvbuf_max));
}
}
tcp_sbspace(struct tcpcb *tp)
{
struct sockbuf *sb = &tp->t_inpcb->inp_socket->so_rcv;
+ u_int32_t rcvbuf = sb->sb_hiwat;
int32_t space;
+ struct socket *so = tp->t_inpcb->inp_socket;
+ int32_t pending = 0;
+
+ /*
+ * If message delivery is enabled, do not count
+ * unordered bytes in receive buffer towards hiwat mark.
+ * This value is used to return correct rwnd that does
+ * not reflect the extra unordered bytes added to the
+ * receive socket buffer.
+ */
+ if (so->so_flags & SOF_ENABLE_MSGS)
+ rcvbuf = rcvbuf - so->so_msg_state->msg_uno_bytes;
tcp_sbrcv_grow_rwin(tp, sb);
- space = ((int32_t) imin((sb->sb_hiwat - sb->sb_cc),
+ space = ((int32_t) imin((rcvbuf - sb->sb_cc),
(sb->sb_mbmax - sb->sb_mbcnt)));
if (space < 0)
space = 0;
+#if CONTENT_FILTER
+ /* Compensate for data being processed by content filters */
+ pending = cfil_sock_data_space(sb);
+#endif /* CONTENT_FILTER */
+ if (pending > space)
+ space = 0;
+ else
+ space -= pending;
+
/* Avoid increasing window size if the current window
* is already very low, we could be in "persist" mode and
* we could break some apps (see rdar://5409343)
return space;
}
/*
- * Checks TCP Segment Offloading capability for a given connection and interface pair.
+ * Checks TCP Segment Offloading capability for a given connection
+ * and interface pair.
*/
void
-tcp_set_tso(tp, ifp)
- struct tcpcb *tp;
- struct ifnet *ifp;
+tcp_set_tso(struct tcpcb *tp, struct ifnet *ifp)
{
#if INET6
- struct inpcb *inp = tp->t_inpcb;
- int isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
+ struct inpcb *inp;
+ int isipv6;
+#endif /* INET6 */
+#if MPTCP
+ /*
+ * We can't use TSO if this tcpcb belongs to an MPTCP session.
+ */
+ if (tp->t_mpflags & TMPF_MPTCP_TRUE) {
+ tp->t_flags &= ~TF_TSO;
+ return;
+ }
+#endif
+#if INET6
+ inp = tp->t_inpcb;
+ isipv6 = (inp->inp_vflag & INP_IPV6) != 0;
if (isipv6) {
- if (ifp && ifp->if_hwassist & IFNET_TSO_IPV6) {
+ if (ifp && (ifp->if_hwassist & IFNET_TSO_IPV6)) {
tp->t_flags |= TF_TSO;
if (ifp->if_tso_v6_mtu != 0)
tp->tso_max_segment_size = ifp->if_tso_v6_mtu;
#endif /* INET6 */
{
- if (ifp && ifp->if_hwassist & IFNET_TSO_IPV4) {
+ if (ifp && (ifp->if_hwassist & IFNET_TSO_IPV4)) {
tp->t_flags |= TF_TSO;
if (ifp->if_tso_v4_mtu != 0)
tp->tso_max_segment_size = ifp->if_tso_v4_mtu;
struct timeval now, hold_now;
uint32_t incr = 0;
- timevaladd(&tv, &interval);
microuptime(&now);
+
+ /*
+ * Update coarse-grained networking timestamp (in sec.); the idea
+ * is to update the counter returnable via net_uptime() when
+ * we read time.
+ */
+ net_update_uptime_secs(now.tv_sec);
+
+ timevaladd(&tv, &interval);
if (timevalcmp(&now, &tv, >)) {
/* time to update the clock */
lck_spin_lock(tcp_uptime_lock);
if (timevalcmp(&tcp_uptime, &now, >=)) {
- /* clock got updated while we were waiting for the lock */
+ /* clock got updated while waiting for the lock */
lck_spin_unlock(tcp_uptime_lock);
return;
- }
+ }
microuptime(&now);
hold_now = now;
void
tcp_set_max_rwinscale(struct tcpcb *tp, struct socket *so) {
u_int32_t maxsockbufsize;
+ if (!tcp_do_rfc1323) {
+ tp->request_r_scale = 0;
+ return;
+ }
tp->request_r_scale = max(tcp_win_scale, tp->request_r_scale);
maxsockbufsize = ((so->so_rcv.sb_flags & SB_USRSIZE) != 0) ?
return(0);
}
+void
+tcp_rxtseg_insert(struct tcpcb *tp, tcp_seq start, tcp_seq end) {
+ struct tcp_rxt_seg *rxseg = NULL, *prev = NULL, *next = NULL;
+ u_int32_t rxcount = 0;
+
+ if (SLIST_EMPTY(&tp->t_rxt_segments))
+ tp->t_dsack_lastuna = tp->snd_una;
+ /*
+ * First check if there is a segment already existing for this
+ * sequence space.
+ */
+
+ SLIST_FOREACH(rxseg, &tp->t_rxt_segments, rx_link) {
+ if (SEQ_GT(rxseg->rx_start, start))
+ break;
+ prev = rxseg;
+ }
+ next = rxseg;
+
+ /* check if prev seg is for this sequence */
+ if (prev != NULL && SEQ_LEQ(prev->rx_start, start) &&
+ SEQ_GEQ(prev->rx_end, end)) {
+ prev->rx_count++;
+ return;
+ }
+
+ /*
+ * There are a couple of possibilities at this point.
+ * 1. prev overlaps with the beginning of this sequence
+ * 2. next overlaps with the end of this sequence
+ * 3. there is no overlap.
+ */
+
+ if (prev != NULL && SEQ_GT(prev->rx_end, start)) {
+ if (prev->rx_start == start && SEQ_GT(end, prev->rx_end)) {
+ start = prev->rx_end + 1;
+ prev->rx_count++;
+ } else {
+ prev->rx_end = (start - 1);
+ rxcount = prev->rx_count;
+ }
+ }
+
+ if (next != NULL && SEQ_LT(next->rx_start, end)) {
+ if (SEQ_LEQ(next->rx_end, end)) {
+ end = next->rx_start - 1;
+ next->rx_count++;
+ } else {
+ next->rx_start = end + 1;
+ rxcount = next->rx_count;
+ }
+ }
+ if (!SEQ_LT(start, end))
+ return;
+
+ rxseg = (struct tcp_rxt_seg *) zalloc(tcp_rxt_seg_zone);
+ if (rxseg == NULL) {
+ return;
+ }
+ bzero(rxseg, sizeof(*rxseg));
+ rxseg->rx_start = start;
+ rxseg->rx_end = end;
+ rxseg->rx_count = rxcount + 1;
+
+ if (prev != NULL) {
+ SLIST_INSERT_AFTER(prev, rxseg, rx_link);
+ } else {
+ SLIST_INSERT_HEAD(&tp->t_rxt_segments, rxseg, rx_link);
+ }
+ return;
+}
+
+struct tcp_rxt_seg *
+tcp_rxtseg_find(struct tcpcb *tp, tcp_seq start, tcp_seq end)
+{
+ struct tcp_rxt_seg *rxseg;
+ if (SLIST_EMPTY(&tp->t_rxt_segments))
+ return (NULL);
+
+ SLIST_FOREACH(rxseg, &tp->t_rxt_segments, rx_link) {
+ if (SEQ_LEQ(rxseg->rx_start, start) &&
+ SEQ_GEQ(rxseg->rx_end, end))
+ return (rxseg);
+ if (SEQ_GT(rxseg->rx_start, start))
+ break;
+ }
+ return (NULL);
+}
+
+void
+tcp_rxtseg_clean(struct tcpcb *tp)
+{
+ struct tcp_rxt_seg *rxseg, *next;
+
+ SLIST_FOREACH_SAFE(rxseg, &tp->t_rxt_segments, rx_link, next) {
+ SLIST_REMOVE(&tp->t_rxt_segments, rxseg,
+ tcp_rxt_seg, rx_link);
+ zfree(tcp_rxt_seg_zone, rxseg);
+ }
+ tp->t_dsack_lastuna = tp->snd_max;
+}
+
+boolean_t
+tcp_rxtseg_detect_bad_rexmt(struct tcpcb *tp, tcp_seq th_ack)
+{
+ boolean_t bad_rexmt;
+ struct tcp_rxt_seg *rxseg;
+
+ if (SLIST_EMPTY(&tp->t_rxt_segments))
+ return (FALSE);
+
+ /*
+ * If all of the segments in this window are not cumulatively
+ * acknowledged, then there can still be undetected packet loss.
+ * Do not restore congestion window in that case.
+ */
+ if (SEQ_LT(th_ack, tp->snd_recover))
+ return (FALSE);
+
+ bad_rexmt = TRUE;
+ SLIST_FOREACH(rxseg, &tp->t_rxt_segments, rx_link) {
+ if (rxseg->rx_count > 1 ||
+ !(rxseg->rx_flags & TCP_RXT_SPURIOUS)) {
+ bad_rexmt = FALSE;
+ break;
+ }
+ }
+ return (bad_rexmt);
+}
+
+boolean_t
+tcp_rxtseg_dsack_for_tlp(struct tcpcb *tp)
+{
+ boolean_t dsack_for_tlp = FALSE;
+ struct tcp_rxt_seg *rxseg;
+ if (SLIST_EMPTY(&tp->t_rxt_segments))
+ return (FALSE);
+
+ SLIST_FOREACH(rxseg, &tp->t_rxt_segments, rx_link) {
+ if (rxseg->rx_count == 1 &&
+ SLIST_NEXT(rxseg,rx_link) == NULL &&
+ (rxseg->rx_flags & TCP_RXT_DSACK_FOR_TLP)) {
+ dsack_for_tlp = TRUE;
+ break;
+ }
+ }
+ return (dsack_for_tlp);
+}
+
+u_int32_t
+tcp_rxtseg_total_size(struct tcpcb *tp) {
+ struct tcp_rxt_seg *rxseg;
+ u_int32_t total_size = 0;
+
+ SLIST_FOREACH(rxseg, &tp->t_rxt_segments, rx_link) {
+ total_size += (rxseg->rx_end - rxseg->rx_start) + 1;
+ }
+ return (total_size);
+}
+
+void
+tcp_get_connectivity_status(struct tcpcb *tp,
+ struct tcp_conn_status *connstatus)
+{
+ if (tp == NULL || connstatus == NULL)
+ return;
+ bzero(connstatus, sizeof(*connstatus));
+ if (tp->t_rxtshift >= TCP_CONNECTIVITY_PROBES_MAX) {
+ if (TCPS_HAVEESTABLISHED(tp->t_state)) {
+ connstatus->write_probe_failed = 1;
+ } else {
+ connstatus->conn_probe_failed = 1;
+ }
+ }
+ if (tp->t_rtimo_probes >= TCP_CONNECTIVITY_PROBES_MAX)
+ connstatus->read_probe_failed = 1;
+ if (tp->t_inpcb != NULL && tp->t_inpcb->inp_last_outifp != NULL
+ && (tp->t_inpcb->inp_last_outifp->if_eflags & IFEF_PROBE_CONNECTIVITY))
+ connstatus->probe_activated = 1;
+ return;
+}
+
+boolean_t
+tfo_enabled(const struct tcpcb *tp)
+{
+ return !!(tp->t_flagsext & TF_FASTOPEN);
+}
+
+void
+tcp_disable_tfo(struct tcpcb *tp)
+{
+ tp->t_flagsext &= ~TF_FASTOPEN;
+}
-/* DSEP Review Done pl-20051213-v02 @3253,@3391,@3400 */
projects / apple / xnu.git / blobdiff