/*
- * Copyright (c) 2000-2011 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
+#include <sys/mcache.h>
#include <kern/cpu_number.h> /* before tcp_seq.h, for tcp_random18() */
#endif /* CONFIG_MACF_NET || CONFIG_MACF_SOCKET */
#include <sys/kdebug.h>
+#include <netinet/lro_ext.h>
#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETTCP, 0)
#define DBG_LAYER_END NETDBG_CODE(DBG_NETTCP, 2)
extern int ipsec_bypass;
#endif
+extern int32_t total_sbmb_cnt;
+
struct tcpstat tcpstat;
static int log_in_vain = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, acc_iaj_high_thresh, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_acc_iaj_high_thresh, 0, "Used in calculating maximum accumulated IAJ");
+u_int32_t tcp_do_autorcvbuf = 1;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, doautorcvbuf, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_do_autorcvbuf, 0, "Enable automatic socket buffer tuning");
+
+u_int32_t tcp_autorcvbuf_inc_shift = 3;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, autorcvbufincshift, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_autorcvbuf_inc_shift, 0, "Shift for increment in receive socket buffer size");
+
+u_int32_t tcp_autorcvbuf_max = 512 * 1024;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, autorcvbufmax, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_autorcvbuf_max, 0, "Maximum receive socket buffer size");
+
+int sw_lro = 1;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, lro, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &sw_lro, 0, "Used to coalesce TCP packets");
+
+int lrodebug = 0;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, lrodbg, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &lrodebug, 0, "Used to debug SW LRO");
+
+int lro_start = 3;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, lro_startcnt, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &lro_start, 0, "Segments for starting LRO computed as power of 2");
+
+extern int tcp_do_autosendbuf;
+
#if CONFIG_IFEF_NOWINDOWSCALE
int tcp_obey_ifef_nowindowscale = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, obey_ifef_nowindowscale, CTLFLAG_RW | CTLFLAG_LOCKED,
&tcp_obey_ifef_nowindowscale, 0, "");
#endif
+/* This limit will determine when the receive socket buffer tuning will
+ * kick in. Currently it will start when the bw*delay measured in
+ * last RTT is more than half of the current hiwat on the buffer.
+ */
+uint32_t tcp_rbuf_hiwat_shift = 1;
+
+/* This limit will determine when the socket buffer will be increased
+ * to accommodate an application reading slowly. When the amount of
+ * space left in the buffer is less than one forth of the bw*delay
+ * measured in last RTT.
+ */
+uint32_t tcp_rbuf_win_shift = 2;
extern int tcp_TCPTV_MIN;
extern int tcp_acc_iaj_high;
#if TRAFFIC_MGT
static inline void update_iaj_state(struct tcpcb *tp, uint32_t tlen, int reset_size);
void compute_iaj(struct tcpcb *tp);
-static inline void clear_iaj_state(struct tcpcb *tp);
#endif /* TRAFFIC_MGT */
#if INET6
static inline unsigned int tcp_maxmtu6(struct rtentry *);
#endif
+static void tcp_sbrcv_grow(struct tcpcb *tp, struct sockbuf *sb,
+ struct tcpopt *to, u_int32_t tlen);
+
+void tcp_sbrcv_trim(struct tcpcb *tp, struct sockbuf *sb);
+static void tcp_sbsnd_trim(struct sockbuf *sbsnd);
+static inline void tcp_sbrcv_tstmp_check(struct tcpcb *tp);
+static inline void tcp_sbrcv_reserve(struct tcpcb *tp, struct sockbuf *sb,
+ u_int32_t newsize, u_int32_t idealsize);
+
+#define TCPTV_RCVNOTS_QUANTUM 100
+#define TCP_RCVNOTS_BYTELEVEL 204800
/* Neighbor Discovery, Neighbor Unreachability Detection Upper layer hint. */
#if INET6
#define ND6_HINT(tp) \
extern void ipfwsyslog( int level, const char *format,...);
extern int ChkAddressOK( __uint32_t dstaddr, __uint32_t srcaddr );
extern int fw_verbose;
-__private_extern__ int tcp_sockthreshold;
-__private_extern__ int tcp_win_scale;
#if IPFIREWALL
#define log_in_vain_log( a ) { \
int tcp_rcvunackwin = TCPTV_UNACKWIN;
int tcp_maxrcvidle = TCPTV_MAXRCVIDLE;
int tcp_rcvsspktcnt = TCP_RCV_SS_PKTCOUNT;
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, rcvsspktcnt, CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_rcvsspktcnt, 0, "packets to be seen before receiver stretches acks");
#define DELAY_ACK(tp, th) (CC_ALGO(tp)->delay_ack != NULL && CC_ALGO(tp)->delay_ack(tp, th))
void tcp_set_background_cc(struct socket *so);
void tcp_set_foreground_cc(struct socket *so);
static void tcp_set_new_cc(struct socket *so, uint16_t cc_index);
+static void tcp_bwmeas_check(struct tcpcb *tp);
#if TRAFFIC_MGT
void
{
tp->acc_iaj = 0;
tp->iaj_rwintop = 0;
- clear_iaj_state(tp);
+ CLEAR_IAJ_STATE(tp);
}
static inline void
}
}
-static inline void
-clear_iaj_state(struct tcpcb *tp)
-{
- tp->iaj_rcv_ts = 0;
-}
-
/* For every 32 bit unsigned integer(v), this function will find the
* largest integer n such that (n*n <= v). This takes at most 16 iterations
* irrespective of the value of v and does not involve multiplications.
}
#endif /* TRAFFIC_MGT */
+/* Check if enough amount of data has been acknowledged since
+ * bw measurement was started
+ */
+static void
+tcp_bwmeas_check(struct tcpcb *tp)
+{
+ int32_t bw_meas_bytes;
+ uint32_t bw, bytes, elapsed_time;
+ bw_meas_bytes = tp->snd_una - tp->t_bwmeas->bw_start;
+ if ((tp->t_flagsext & TF_BWMEAS_INPROGRESS) != 0 &&
+ bw_meas_bytes >= (int32_t)(tp->t_bwmeas->bw_size)) {
+ bytes = bw_meas_bytes;
+ elapsed_time = tcp_now - tp->t_bwmeas->bw_ts;
+ if (elapsed_time > 0) {
+ bw = bytes / elapsed_time;
+ if ( bw > 0) {
+ if (tp->t_bwmeas->bw_sndbw > 0) {
+ tp->t_bwmeas->bw_sndbw =
+ (((tp->t_bwmeas->bw_sndbw << 3) - tp->t_bwmeas->bw_sndbw) + bw) >> 3;
+ } else {
+ tp->t_bwmeas->bw_sndbw = bw;
+ }
+ }
+ }
+ tp->t_flagsext &= ~(TF_BWMEAS_INPROGRESS);
+ }
+}
+
static int
tcp_reass(tp, th, tlenp, m)
register struct tcpcb *tp;
if (!TCPS_HAVEESTABLISHED(tp->t_state))
return (0);
q = LIST_FIRST(&tp->t_segq);
- if (!q || q->tqe_th->th_seq != tp->rcv_nxt)
+ if (!q || q->tqe_th->th_seq != tp->rcv_nxt) {
+ /* Stop using LRO once out of order packets arrive */
+ if (tp->t_flagsext & TF_LRO_OFFLOADED) {
+ tcp_lro_remove_state(tp->t_inpcb->inp_laddr,
+ tp->t_inpcb->inp_faddr,
+ th->th_dport, th->th_sport);
+ tp->t_flagsext &= ~TF_LRO_OFFLOADED;
+ }
return (0);
+ }
do {
tp->rcv_nxt += q->tqe_len;
flags = q->tqe_th->th_flags & TH_FIN;
so_recv_data_stat(so, q->tqe_m, 0); /* XXXX */
if (sbappendstream(&so->so_rcv, q->tqe_m))
dowakeup = 1;
+ if (tp->t_flagsext & TF_LRO_OFFLOADED) {
+ tcp_update_lro_seq(tp->rcv_nxt,
+ tp->t_inpcb->inp_laddr,
+ tp->t_inpcb->inp_faddr, th->th_dport, th->th_sport);
+ }
}
zfree(tcp_reass_zone, q);
tcp_reass_qsize--;
*/
static void
tcp_reduce_congestion_window(
- struct tcpcb *tp, struct tcphdr *th)
+ struct tcpcb *tp)
{
/*
* If the current tcp cc module has
* before entering FR, call it
*/
if (CC_ALGO(tp)->pre_fr != NULL)
- CC_ALGO(tp)->pre_fr(tp, th);
+ CC_ALGO(tp)->pre_fr(tp);
ENTER_FASTRECOVERY(tp);
tp->snd_recover = tp->snd_max;
tp->t_timer[TCPT_REXMT] = 0;
#pragma unused(proto)
register struct mbuf *m = *mp;
struct in6_ifaddr *ia6;
+ struct ifnet *ifp = ((m->m_flags & M_PKTHDR) && m->m_pkthdr.rcvif != NULL) ? m->m_pkthdr.rcvif: NULL;
IP6_EXTHDR_CHECK(m, *offp, sizeof(struct tcphdr), return IPPROTO_DONE);
+ /* Expect 32-bit aligned data pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
/*
* draft-itojun-ipv6-tcp-to-anycast
* better place to put this in?
icmp6_error(m, ICMP6_DST_UNREACH,
ICMP6_DST_UNREACH_ADDR,
(caddr_t)&ip6->ip6_dst - (caddr_t)ip6);
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->icmp6unreach, 1);
+
return (IPPROTO_DONE);
}
IFA_UNLOCK(&ia6->ia_ifa);
}
#endif
+/* Depending on the usage of mbuf space in the system, this function
+ * will return true or false. This is used to determine if a socket
+ * buffer can take more memory from the system for auto-tuning or not.
+ */
+u_int8_t
+tcp_cansbgrow(struct sockbuf *sb)
+{
+ /* Calculate the host level space limit in terms of MSIZE buffers.
+ * We can use a maximum of half of the available mbuf space for
+ * socket buffers.
+ */
+ u_int32_t mblim = ((nmbclusters >> 1) << (MCLSHIFT - MSIZESHIFT));
+
+ /* Calculate per sb limit in terms of bytes. We optimize this limit
+ * for upto 16 socket buffers.
+ */
+
+ u_int32_t sbspacelim = ((nmbclusters >> 4) << MCLSHIFT);
+
+ if ((total_sbmb_cnt < mblim) &&
+ (sb->sb_hiwat < sbspacelim)) {
+ return(1);
+ }
+ return(0);
+}
+
+void
+tcp_sbrcv_reserve(struct tcpcb *tp,
+ struct sockbuf *sbrcv,
+ u_int32_t newsize,
+ u_int32_t idealsize) {
+
+ /* newsize should not exceed max */
+ newsize = min(newsize, tcp_autorcvbuf_max);
+
+ /* The receive window scale negotiated at the
+ * beginning of the connection will also set a
+ * limit on the socket buffer size
+ */
+ newsize = min(newsize, TCP_MAXWIN << tp->rcv_scale);
+
+ /* Set new socket buffer size */
+ if (newsize > sbrcv->sb_hiwat &&
+ (sbreserve(sbrcv, newsize) == 1)) {
+ sbrcv->sb_idealsize = min(max(sbrcv->sb_idealsize,
+ (idealsize != 0) ? idealsize : newsize),
+ tcp_autorcvbuf_max);
+
+ /* Again check the limit set by the advertised
+ * window scale
+ */
+ sbrcv->sb_idealsize = min(sbrcv->sb_idealsize,
+ TCP_MAXWIN << tp->rcv_scale);
+ }
+}
+
+/*
+ * This function is used to grow a receive socket buffer. It
+ * will take into account system-level memory usage and the
+ * bandwidth available on the link to make a decision.
+ */
+static void
+tcp_sbrcv_grow(struct tcpcb *tp, struct sockbuf *sbrcv,
+ struct tcpopt *to, u_int32_t pktlen) {
+
+ if (tcp_do_autorcvbuf == 0 ||
+ (sbrcv->sb_flags & SB_AUTOSIZE) == 0 ||
+ tcp_cansbgrow(sbrcv) == 0 ||
+ sbrcv->sb_hiwat >= tcp_autorcvbuf_max) {
+ /* Can not resize the socket buffer, just return */
+ goto out;
+ }
+
+ if (TSTMP_GT(tcp_now,
+ tp->rfbuf_ts + TCPTV_RCVBUFIDLE)) {
+ /* If there has been an idle period in the
+ * connection, just restart the measurement
+ */
+ goto out;
+ }
+
+ if ((tp->t_flags & (TF_REQ_TSTMP | TF_RCVD_TSTMP)) !=
+ (TF_REQ_TSTMP | TF_RCVD_TSTMP)) {
+ /*
+ * Timestamp option is not supported on this connection.
+ * If the connection reached a state to indicate that
+ * the receive socket buffer needs to grow, increase
+ * the high water mark.
+ */
+ if (TSTMP_GEQ(tcp_now,
+ tp->rfbuf_ts + TCPTV_RCVNOTS_QUANTUM)) {
+ if (tp->rfbuf_cnt >= TCP_RCVNOTS_BYTELEVEL) {
+ tcp_sbrcv_reserve(tp, sbrcv,
+ tcp_autorcvbuf_max, 0);
+ }
+ goto out;
+ } else {
+ tp->rfbuf_cnt += pktlen;
+ return;
+ }
+ } else if (to->to_tsecr != 0) {
+ /* If the timestamp shows that one RTT has
+ * completed, we can stop counting the
+ * bytes. Here we consider increasing
+ * the socket buffer if it fits the following
+ * criteria:
+ * 1. the bandwidth measured in last rtt, is more
+ * than half of sb_hiwat, this will help to scale the
+ * buffer according to the bandwidth on the link.
+ * 2. the space left in sbrcv is less than
+ * one forth of the bandwidth measured in last rtt, this
+ * will help to accommodate an application reading slowly.
+ */
+ if (TSTMP_GEQ(to->to_tsecr, tp->rfbuf_ts)) {
+ if ((tp->rfbuf_cnt > (sbrcv->sb_hiwat -
+ (sbrcv->sb_hiwat >> tcp_rbuf_hiwat_shift)) ||
+ (sbrcv->sb_hiwat - sbrcv->sb_cc) <
+ (tp->rfbuf_cnt >> tcp_rbuf_win_shift))) {
+ u_int32_t rcvbuf_inc;
+ /*
+ * Increment the receive window by a multiple of
+ * maximum sized segments. This will prevent a
+ * connection from sending smaller segments on
+ * wire if it is limited by the receive window.
+ *
+ * Set the ideal size based on current bandwidth
+ * measurements. We set the ideal size on receive
+ * socket buffer to be twice the bandwidth delay
+ * product.
+ */
+ rcvbuf_inc = tp->t_maxseg << tcp_autorcvbuf_inc_shift;
+ tcp_sbrcv_reserve(tp, sbrcv,
+ sbrcv->sb_hiwat + rcvbuf_inc,
+ (tp->rfbuf_cnt * 2));
+ }
+ goto out;
+ } else {
+ tp->rfbuf_cnt += pktlen;
+ return;
+ }
+ }
+out:
+ /* Restart the measurement */
+ tp->rfbuf_ts = 0;
+ tp->rfbuf_cnt = 0;
+ return;
+}
+
+/* This function will trim the excess space added to the socket buffer
+ * to help a slow-reading app. The ideal-size of a socket buffer depends
+ * on the link bandwidth or it is set by an application and we aim to
+ * reach that size.
+ */
+void
+tcp_sbrcv_trim(struct tcpcb *tp, struct sockbuf *sbrcv) {
+ if (tcp_do_autorcvbuf == 1 && sbrcv->sb_idealsize > 0 &&
+ sbrcv->sb_hiwat > sbrcv->sb_idealsize) {
+ int32_t trim;
+ /* compute the difference between ideal and current sizes */
+ u_int32_t diff = sbrcv->sb_hiwat - sbrcv->sb_idealsize;
+
+ /* Compute the maximum advertised window for
+ * this connection.
+ */
+ u_int32_t advwin = tp->rcv_adv - tp->rcv_nxt;
+
+ /* How much can we trim the receive socket buffer?
+ * 1. it can not be trimmed beyond the max rcv win advertised
+ * 2. if possible, leave 1/16 of bandwidth*delay to
+ * avoid closing the win completely
+ */
+ u_int32_t leave = max(advwin, (sbrcv->sb_idealsize >> 4));
+
+ /* Sometimes leave can be zero, in that case leave at least
+ * a few segments worth of space.
+ */
+ if (leave == 0)
+ leave = tp->t_maxseg << tcp_autorcvbuf_inc_shift;
+
+ trim = sbrcv->sb_hiwat - (sbrcv->sb_cc + leave);
+ trim = imin(trim, (int32_t)diff);
+
+ if (trim > 0)
+ sbreserve(sbrcv, (sbrcv->sb_hiwat - trim));
+ }
+}
+
+/* We may need to trim the send socket buffer size for two reasons:
+ * 1. if the rtt seen on the connection is climbing up, we do not
+ * want to fill the buffers any more.
+ * 2. if the congestion win on the socket backed off, there is no need
+ * to hold more mbufs for that connection than what the cwnd will allow.
+ */
+void
+tcp_sbsnd_trim(struct sockbuf *sbsnd) {
+ if (tcp_do_autosendbuf == 1 &&
+ ((sbsnd->sb_flags & (SB_AUTOSIZE | SB_TRIM)) ==
+ (SB_AUTOSIZE | SB_TRIM)) &&
+ (sbsnd->sb_idealsize > 0) &&
+ (sbsnd->sb_hiwat > sbsnd->sb_idealsize)) {
+ u_int32_t trim = 0;
+ if (sbsnd->sb_cc <= sbsnd->sb_idealsize) {
+ trim = sbsnd->sb_hiwat - sbsnd->sb_idealsize;
+ } else {
+ trim = sbsnd->sb_hiwat - sbsnd->sb_cc;
+ }
+ sbreserve(sbsnd, (sbsnd->sb_hiwat - trim));
+ }
+ if (sbsnd->sb_hiwat <= sbsnd->sb_idealsize)
+ sbsnd->sb_flags &= ~(SB_TRIM);
+}
+
+/*
+ * If timestamp option was not negotiated on this connection
+ * and this connection is on the receiving side of a stream
+ * then we can not measure the delay on the link accurately.
+ * Instead of enabling automatic receive socket buffer
+ * resizing, just give more space to the receive socket buffer.
+ */
+static inline void
+tcp_sbrcv_tstmp_check(struct tcpcb *tp) {
+ struct socket *so = tp->t_inpcb->inp_socket;
+ u_int32_t newsize = 2 * tcp_recvspace;
+ struct sockbuf *sbrcv = &so->so_rcv;
+
+ if ((tp->t_flags & (TF_REQ_TSTMP | TF_RCVD_TSTMP)) !=
+ (TF_REQ_TSTMP | TF_RCVD_TSTMP) &&
+ (sbrcv->sb_flags & SB_AUTOSIZE) != 0) {
+ tcp_sbrcv_reserve(tp, sbrcv, newsize, 0);
+ }
+}
+
/* A receiver will evaluate the flow of packets on a connection
* to see if it can reduce ack traffic. The receiver will start
* stretching acks if all of the following conditions are met:
(tp->rcv_waitforss >= tcp_rcvsspktcnt))) {
return(1);
}
+
return(0);
}
struct in6_addr laddr6;
#endif
int dropsocket = 0;
- int iss = 0;
- int nosock = 0;
+ int iss = 0, nosock = 0;
u_int32_t tiwin;
struct tcpopt to; /* options in this segment */
struct sockaddr_in *next_hop = NULL;
u_char ip_ecn = IPTOS_ECN_NOTECT;
unsigned int ifscope, nocell = 0;
uint8_t isconnected, isdisconnected;
+ struct ifnet *ifp = ((m->m_flags & M_PKTHDR) && m->m_pkthdr.rcvif != NULL) ? m->m_pkthdr.rcvif: NULL;
+ int nlropkts = m->m_pkthdr.lro_npkts;
+ int mauxf_sw_lro_pkt = (m->m_pkthdr.aux_flags & MAUXF_SW_LRO_PKT) ? 1 : 0;
+ int turnoff_lro = 0;
+#define TCP_INC_VAR(stat, npkts) do { \
+ if (mauxf_sw_lro_pkt) { \
+ stat += npkts; \
+ } else { \
+ stat++; \
+ } \
+} while (0)
- /*
- * Record the interface where this segment arrived on; this does not
- * affect normal data output (for non-detached TCP) as it provides a
- * hint about which route and interface to use for sending in the
- * absence of a PCB, when scoped routing (and thus source interface
- * selection) are enabled.
- */
- if ((m->m_flags & M_PKTHDR) && m->m_pkthdr.rcvif != NULL)
- ifscope = m->m_pkthdr.rcvif->if_index;
- else
- ifscope = IFSCOPE_NONE;
-
- /* Since this is an entry point for input processing of tcp packets, we
- * can update the tcp clock here.
- */
- calculate_tcp_clock();
-
+ TCP_INC_VAR(tcpstat.tcps_rcvtotal, nlropkts);
+
/* Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain. */
if (!SLIST_EMPTY(&m->m_pkthdr.tags)) {
fwd_tag = m_tag_locate(m, KERNEL_MODULE_TAG_ID,
#endif
bzero((char *)&to, sizeof(to));
- tcpstat.tcps_rcvtotal++;
-
-
-
#if INET6
if (isipv6) {
+ /* Expect 32-bit aligned data pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
/* IP6_EXTHDR_CHECK() is already done at tcp6_input() */
ip6 = mtod(m, struct ip6_hdr *);
tlen = sizeof(*ip6) + ntohs(ip6->ip6_plen) - off0;
- th = (struct tcphdr *)((caddr_t)ip6 + off0);
+ th = (struct tcphdr *)(void *)((caddr_t)ip6 + off0);
if ((apple_hwcksum_rx != 0) && (m->m_pkthdr.csum_flags & CSUM_DATA_VALID)) {
if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
th->th_sum = m->m_pkthdr.csum_data;
- else
- th->th_sum = in6_cksum_phdr(&ip6->ip6_src,
- &ip6->ip6_dst, htonl(sizeof(struct tcphdr)),
- htonl(IPPROTO_TCP));
+ else {
+ /*
+ * There is no established protocol for the case
+ * where IPv6 psuedoheader checksum is not computed
+ * with our current drivers. Current drivers set
+ * CSUM_PSEUDO_HDR. So if we do get here, we should
+ * recalculate checksum.
+ */
+ if (in6_cksum(m, IPPROTO_TCP, off0, tlen)) {
+ th->th_sum = 0;
+ } else {
+ th->th_sum = 0xffff;
+ }
+ }
th->th_sum ^= 0xffff;
if (th->th_sum) {
tcpstat.tcps_rcvbadsum++;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->badformat, 1);
+
goto dropnosock;
}
}
else {
if (in6_cksum(m, IPPROTO_TCP, off0, tlen)) {
tcpstat.tcps_rcvbadsum++;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->badformat, 1);
+
goto dropnosock;
}
}
*/
if (IN6_IS_ADDR_UNSPECIFIED(&ip6->ip6_src)) {
/* XXX stat */
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->unspecv6, 1);
+
goto dropnosock;
}
DTRACE_TCP5(receive, sruct mbuf *, m, struct inpcb *, NULL,
return;
}
}
+
+ /* Expect 32-bit aligned data pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+
ip = mtod(m, struct ip *);
ipov = (struct ipovly *)ip;
- th = (struct tcphdr *)((caddr_t)ip + off0);
+ th = (struct tcphdr *)(void *)((caddr_t)ip + off0);
tlen = ip->ip_len;
- DTRACE_TCP5(receive, struct mbuf *, m, struct inpcb *, NULL,
- struct ip *, ip, struct tcpcb *, NULL, struct tcphdr *, th);
-
- KERNEL_DEBUG(DBG_LAYER_BEG, ((th->th_dport << 16) | th->th_sport),
- (((ip->ip_src.s_addr & 0xffff) << 16) | (ip->ip_dst.s_addr & 0xffff)),
- th->th_seq, th->th_ack, th->th_win);
-
+ if (m->m_pkthdr.aux_flags & MAUXF_SW_LRO_DID_CSUM) {
+ goto skip_checksum;
+ }
if (m->m_pkthdr.csum_flags & CSUM_DATA_VALID) {
if (m->m_pkthdr.csum_flags & CSUM_TCP_SUM16) {
u_short pseudo;
char b[9];
- *(uint32_t*)&b[0] = *(uint32_t*)&ipov->ih_x1[0];
- *(uint32_t*)&b[4] = *(uint32_t*)&ipov->ih_x1[4];
- *(uint8_t*)&b[8] = *(uint8_t*)&ipov->ih_x1[8];
-
- bzero(ipov->ih_x1, sizeof(ipov->ih_x1));
- ipov->ih_len = (u_short)tlen;
+ bcopy(ipov->ih_x1, b, sizeof (ipov->ih_x1));
+ bzero(ipov->ih_x1, sizeof (ipov->ih_x1));
+ ipov->ih_len = (u_short)tlen;
#if BYTE_ORDER != BIG_ENDIAN
HTONS(ipov->ih_len);
#endif
-
pseudo = in_cksum(m, sizeof (struct ip));
-
- *(uint32_t*)&ipov->ih_x1[0] = *(uint32_t*)&b[0];
- *(uint32_t*)&ipov->ih_x1[4] = *(uint32_t*)&b[4];
- *(uint8_t*)&ipov->ih_x1[8] = *(uint8_t*)&b[8];
-
+ bcopy(b, ipov->ih_x1, sizeof (ipov->ih_x1));
+
th->th_sum = in_addword(pseudo, (m->m_pkthdr.csum_data & 0xFFFF));
} else {
if (m->m_pkthdr.csum_flags & CSUM_PSEUDO_HDR)
/*
* Checksum extended TCP header and data.
*/
- *(uint32_t*)&b[0] = *(uint32_t*)&ipov->ih_x1[0];
- *(uint32_t*)&b[4] = *(uint32_t*)&ipov->ih_x1[4];
- *(uint8_t*)&b[8] = *(uint8_t*)&ipov->ih_x1[8];
-
- len = sizeof (struct ip) + tlen;
- bzero(ipov->ih_x1, sizeof(ipov->ih_x1));
+ bcopy(ipov->ih_x1, b, sizeof (ipov->ih_x1));
+ bzero(ipov->ih_x1, sizeof (ipov->ih_x1));
ipov->ih_len = (u_short)tlen;
-
#if BYTE_ORDER != BIG_ENDIAN
HTONS(ipov->ih_len);
#endif
-
+ len = sizeof (struct ip) + tlen;
th->th_sum = in_cksum(m, len);
-
- *(uint32_t*)&ipov->ih_x1[0] = *(uint32_t*)&b[0];
- *(uint32_t*)&ipov->ih_x1[4] = *(uint32_t*)&b[4];
- *(uint8_t*)&ipov->ih_x1[8] = *(uint8_t*)&b[8];
+ bcopy(b, ipov->ih_x1, sizeof (ipov->ih_x1));
tcp_in_cksum_stats(len);
}
if (th->th_sum) {
tcpstat.tcps_rcvbadsum++;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->badformat, 1);
+ if (lrodebug) printf("tcp_input: bad xsum len = %d, tlen = %d, flags = %x, csum_flags = %x.\n",len, tlen, m->m_flags, m->m_pkthdr.csum_flags);
goto dropnosock;
}
+skip_checksum:
#if INET6
/* Re-initialization for later version check */
ip->ip_v = IPVERSION;
#endif
ip_ecn = (ip->ip_tos & IPTOS_ECN_MASK);
+
+ DTRACE_TCP5(receive, struct mbuf *, m, struct inpcb *, NULL,
+ struct ip *, ip, struct tcpcb *, NULL, struct tcphdr *, th);
+
+ KERNEL_DEBUG(DBG_LAYER_BEG, ((th->th_dport << 16) | th->th_sport),
+ (((ip->ip_src.s_addr & 0xffff) << 16) | (ip->ip_dst.s_addr & 0xffff)),
+ th->th_seq, th->th_ack, th->th_win);
+
}
/*
off = th->th_off << 2;
if (off < sizeof (struct tcphdr) || off > tlen) {
tcpstat.tcps_rcvbadoff++;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->badformat, 1);
+
goto dropnosock;
}
tlen -= off; /* tlen is used instead of ti->ti_len */
if (isipv6) {
IP6_EXTHDR_CHECK(m, off0, off, return);
ip6 = mtod(m, struct ip6_hdr *);
- th = (struct tcphdr *)((caddr_t)ip6 + off0);
+ th = (struct tcphdr *)(void *)((caddr_t)ip6 + off0);
} else
#endif /* INET6 */
{
}
ip = mtod(m, struct ip *);
ipov = (struct ipovly *)ip;
- th = (struct tcphdr *)((caddr_t)ip + off0);
+ th = (struct tcphdr *)(void *)((caddr_t)ip + off0);
}
}
optlen = off - sizeof (struct tcphdr);
if ((optlen == TCPOLEN_TSTAMP_APPA ||
(optlen > TCPOLEN_TSTAMP_APPA &&
optp[TCPOLEN_TSTAMP_APPA] == TCPOPT_EOL)) &&
- *(u_int32_t *)optp == htonl(TCPOPT_TSTAMP_HDR) &&
+ *(u_int32_t *)(void *)optp == htonl(TCPOPT_TSTAMP_HDR) &&
(th->th_flags & TH_SYN) == 0) {
to.to_flags |= TOF_TS;
- to.to_tsval = ntohl(*(u_int32_t *)(optp + 4));
- to.to_tsecr = ntohl(*(u_int32_t *)(optp + 8));
+ to.to_tsval = ntohl(*(u_int32_t *)(void *)(optp + 4));
+ to.to_tsecr = ntohl(*(u_int32_t *)(void *)(optp + 8));
optp = NULL; /* we've parsed the options */
}
}
*
* This is a violation of the TCP specification.
*/
- if (drop_synfin && (thflags & (TH_SYN|TH_FIN)) == (TH_SYN|TH_FIN))
+ if (drop_synfin && (thflags & (TH_SYN|TH_FIN)) == (TH_SYN|TH_FIN)) {
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->synfin, 1);
+
goto dropnosock;
-#endif
-
- /*
- * Convert TCP protocol specific fields to host format.
- */
-
-#if BYTE_ORDER != BIG_ENDIAN
- NTOHL(th->th_seq);
- NTOHL(th->th_ack);
- NTOHS(th->th_win);
- NTOHS(th->th_urp);
+ }
#endif
/*
* parameters to be unchanged.
*/
drop_hdrlen = off0 + off;
+
+ /* Since this is an entry point for input processing of tcp packets, we
+ * can update the tcp clock here.
+ */
+ calculate_tcp_clock();
+
+ /*
+ * Record the interface where this segment arrived on; this does not
+ * affect normal data output (for non-detached TCP) as it provides a
+ * hint about which route and interface to use for sending in the
+ * absence of a PCB, when scoped routing (and thus source interface
+ * selection) are enabled.
+ */
+ if ((m->m_flags & M_PKTHDR) && m->m_pkthdr.rcvif != NULL)
+ ifscope = m->m_pkthdr.rcvif->if_index;
+ else
+ ifscope = IFSCOPE_NONE;
+
+ /*
+ * Convert TCP protocol specific fields to host format.
+ */
+
+#if BYTE_ORDER != BIG_ENDIAN
+ NTOHL(th->th_seq);
+ NTOHL(th->th_ack);
+ NTOHS(th->th_win);
+ NTOHS(th->th_urp);
+#endif
/*
* Locate pcb for segment.
* the segment arrived on.
*/
if (inp != NULL && (inp->inp_flags & INP_BOUND_IF))
- ifscope = inp->inp_boundif;
+ ifscope = inp->inp_boundifp->if_index;
+
/*
* If the PCB is present and the socket isn't allowed to use
* the cellular interface, indicate it as such for tcp_respond.
IPSEC_STAT_INCREMENT(ipsec6stat.in_polvio);
if (in_pcb_checkstate(inp, WNT_RELEASE, 0) == WNT_STOPUSING)
inp = NULL; // pretend we didn't find it
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->badformatipsec, 1);
+
goto dropnosock;
}
} else
IPSEC_STAT_INCREMENT(ipsecstat.in_polvio);
if (in_pcb_checkstate(inp, WNT_RELEASE, 0) == WNT_STOPUSING)
inp = NULL; // pretend we didn't find it
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->badformatipsec, 1);
+
goto dropnosock;
}
}
ntohs(th->th_sport), thflags);
break;
case 3:
- if ((thflags & TH_SYN) &&
+ if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&
!(m->m_flags & (M_BCAST | M_MCAST)) &&
#if INET6
((isipv6 && !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &ip6->ip6_src)) ||
}
if (blackhole) {
if (m->m_pkthdr.rcvif && m->m_pkthdr.rcvif->if_type != IFT_LOOP)
+
switch (blackhole) {
case 1:
if (thflags & TH_SYN)
}
}
rstreason = BANDLIM_RST_CLOSEDPORT;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->noconnnolist, 1);
+
goto dropwithresetnosock;
}
so = inp->inp_socket;
tp = intotcpcb(inp);
if (tp == 0) {
rstreason = BANDLIM_RST_CLOSEDPORT;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->noconnlist, 1);
+
goto dropwithreset;
}
if (tp->t_state == TCPS_CLOSED)
#if INET6
struct inpcb *oinp = sotoinpcb(so);
#endif /* INET6 */
- unsigned int head_ifscope;
- unsigned int head_nocell;
+ struct ifnet *head_ifscope;
+ unsigned int head_nocell, head_recvanyif;
/* Get listener's bound-to-interface, if any */
head_ifscope = (inp->inp_flags & INP_BOUND_IF) ?
- inp->inp_boundif : IFSCOPE_NONE;
+ inp->inp_boundifp : NULL;
/* Get listener's no-cellular information, if any */
head_nocell = (inp->inp_flags & INP_NO_IFT_CELLULAR) ? 1 : 0;
+ /* Get listener's recv-any-interface, if any */
+ head_recvanyif = (inp->inp_flags & INP_RECV_ANYIF);
/*
* If the state is LISTEN then ignore segment if it contains an RST.
* If it is from this socket, drop it, it must be forged.
*/
if ((thflags & (TH_RST|TH_ACK|TH_SYN)) != TH_SYN) {
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->listbadsyn, 1);
+
if (thflags & TH_RST) {
goto drop;
}
IFA_REMREF(&ia6->ia_ifa);
tp = NULL;
rstreason = BANDLIM_RST_OPENPORT;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->deprecate6, 1);
+
goto dropwithreset;
}
IFA_UNLOCK(&ia6->ia_ifa);
dropsocket++;
/*
* Inherit INP_BOUND_IF from listener; testing if
- * head_ifscope is non-zero is sufficient, since it
+ * head_ifscope is non-NULL is sufficient, since it
* can only be set to a non-zero value earlier if
* the listener has such a flag set.
*/
- if (head_ifscope != IFSCOPE_NONE) {
+ if (head_ifscope != NULL) {
inp->inp_flags |= INP_BOUND_IF;
- inp->inp_boundif = head_ifscope;
+ inp->inp_boundifp = head_ifscope;
+ } else {
+ inp->inp_flags &= ~INP_BOUND_IF;
}
/*
* Inherit INP_NO_IFT_CELLULAR from listener.
if (head_nocell) {
inp->inp_flags |= INP_NO_IFT_CELLULAR;
}
+ /*
+ * Inherit {IN,IN6}_RECV_ANYIF from listener.
+ */
+ if (head_recvanyif)
+ inp->inp_flags |= INP_RECV_ANYIF;
+ else
+ inp->inp_flags &= ~INP_RECV_ANYIF;
#if INET6
if (isipv6)
inp->in6p_laddr = ip6->ip6_dst;
inp->in6p_laddr = in6addr_any;
else
#endif /* INET6 */
- inp->inp_laddr.s_addr = INADDR_ANY;
+ inp->inp_laddr.s_addr = INADDR_ANY;
inp->inp_lport = 0;
tcp_lock(oso, 0, 0); /* release ref on parent */
tcp_unlock(oso, 1, 0);
M_NOWAIT);
} else
#endif /* INET6 */
- inp->inp_options = ip_srcroute();
+ inp->inp_options = ip_srcroute();
tcp_lock(oso, 0, 0);
#if IPSEC
/* copy old policy into new socket's */
tp->t_flagsext |= (tp0->t_flagsext & TF_RXTFINDROP);
tp->t_keepinit = tp0->t_keepinit;
tp->t_inpcb->inp_ip_ttl = tp0->t_inpcb->inp_ip_ttl;
+ if ((so->so_flags & SOF_NOTSENT_LOWAT) != 0)
+ tp->t_notsent_lowat = tp0->t_notsent_lowat;
/* now drop the reference on the listener */
tcp_unlock(oso, 1, 0);
- /* Compute proper scaling value from buffer space */
- if (inp->inp_pcbinfo->ipi_count < tcp_sockthreshold) {
- tp->request_r_scale = max(tcp_win_scale, tp->request_r_scale);
- so->so_rcv.sb_hiwat = imin(TCP_MAXWIN << tp->request_r_scale, (sb_max / (MSIZE+MCLBYTES)) * MCLBYTES);
- }
- else {
- while (tp->request_r_scale < TCP_MAX_WINSHIFT &&
- TCP_MAXWIN << tp->request_r_scale <
- so->so_rcv.sb_hiwat)
- tp->request_r_scale++;
- }
+ tcp_set_max_rwinscale(tp, so);
KERNEL_DEBUG(DBG_FNC_TCP_NEWCONN | DBG_FUNC_END,0,0,0,0,0);
}
* certain criteria defined in tcp_stretch_ack_enable function.
*/
if ((tp->t_flagsext & TF_RCVUNACK_WAITSS) != 0) {
- tp->rcv_waitforss++;
+ TCP_INC_VAR(tp->rcv_waitforss, nlropkts);
}
if (tcp_stretch_ack_enable(tp)) {
tp->t_flags |= TF_STRETCHACK;
tp->rcv_by_unackwin = tlen + off;
}
}
-
+
+ /*
+ * Keep track of how many bytes were received in the LRO packet
+ */
+ if ((mauxf_sw_lro_pkt) && (nlropkts > 2)) {
+ tp->t_lropktlen += tlen;
+ }
/*
Explicit Congestion Notification - Flag that we need to send ECT if
+ The IP Congestion experienced flag was set.
TE_SENDECE will be cleared when we receive a packet with TH_CWR set.
*/
if (ip_ecn == IPTOS_ECN_CE && tp->t_state == TCPS_ESTABLISHED &&
- (tp->ecn_flags & (TE_SETUPSENT | TE_SETUPRECEIVED)) ==
- (TE_SETUPSENT | TE_SETUPRECEIVED) && tlen > 0 &&
+ ((tp->ecn_flags & (TE_ECN_ON)) == (TE_ECN_ON)) && tlen > 0 &&
SEQ_GEQ(th->th_seq, tp->last_ack_sent) &&
SEQ_LT(th->th_seq, tp->last_ack_sent + tp->rcv_wnd)) {
tp->ecn_flags |= TE_SENDECE;
if (tp->t_state == TCPS_ESTABLISHED && (tp->t_flags & TF_STRETCHACK) != 0 &&
((ip_ecn == IPTOS_ECN_CE) || ((thflags & TH_CWR) == TH_CWR)))
tcp_reset_stretch_ack(tp);
-
+
+ /*
+ * Try to determine if we are receiving a packet after a long time.
+ * Use our own approximation of idletime to roughly measure remote
+ * end's idle time. Since slowstart is used after an idle period
+ * we want to avoid doing LRO if the remote end is not up to date
+ * on initial window support and starts with 1 or 2 packets as its IW.
+ */
+ if (sw_lro && (tp->t_flagsext & TF_LRO_OFFLOADED) &&
+ ((tcp_now - tp->t_rcvtime) >= (TCP_IDLETIMEOUT(tp)))) {
+ turnoff_lro = 1;
+ }
+
/*
* Segment received on connection.
* Reset idle time and keep-alive timer.
TSTMP_GEQ(to.to_tsval, tp->ts_recent)) &&
th->th_seq == tp->rcv_nxt &&
LIST_EMPTY(&tp->t_segq)) {
+ int seg_size = tlen;
if (tp->iaj_pktcnt <= IAJ_IGNORE_PKTCNT) {
- tp->iaj_pktcnt++;
+ TCP_INC_VAR(tp->iaj_pktcnt, nlropkts);
}
- if ( tp->iaj_size == 0 || tlen > tp->iaj_size ||
- (tlen == tp->iaj_size && tp->iaj_rcv_ts == 0)) {
+ if (m->m_pkthdr.aux_flags & MAUXF_SW_LRO_PKT) {
+ seg_size = m->m_pkthdr.lro_pktlen;
+ }
+ if ( tp->iaj_size == 0 || seg_size > tp->iaj_size ||
+ (seg_size == tp->iaj_size && tp->iaj_rcv_ts == 0)) {
/* State related to inter-arrival jitter is uninitialized
* or we are trying to find a good first packet to start
* computing the metric
*/
- update_iaj_state(tp, tlen, 0);
+ update_iaj_state(tp, seg_size, 0);
} else {
- if (tlen == tp->iaj_size) {
+ if (seg_size == tp->iaj_size) {
/* Compute inter-arrival jitter taking this packet
* as the second packet
*/
compute_iaj(tp);
}
- if (tlen < tp->iaj_size) {
+ if (seg_size < tp->iaj_size) {
/* There is a smaller packet in the stream.
* Some times the maximum size supported on a path can
* change if there is a new link with smaller MTU.
*/
tp->iaj_small_pkt++;
if (tp->iaj_small_pkt > RESET_IAJ_SIZE_THRESH) {
- update_iaj_state(tp, tlen, 1);
+ update_iaj_state(tp, seg_size, 1);
} else {
- clear_iaj_state(tp);
+ CLEAR_IAJ_STATE(tp);
}
} else {
- update_iaj_state(tp, tlen, 0);
+ update_iaj_state(tp, seg_size, 0);
}
}
} else {
- clear_iaj_state(tp);
+ CLEAR_IAJ_STATE(tp);
}
#endif /* TRAFFIC_MGT */
tp->t_badrxtwin = 0;
tp->t_rxtshift = 0;
tp->rxt_start = 0;
+ tcp_bad_rexmt_fix_sndbuf(tp);
DTRACE_TCP5(cc, void, NULL, struct inpcb *, tp->t_inpcb,
struct tcpcb *, tp, struct tcphdr *, th,
int32_t, TCP_CC_BAD_REXMT_RECOVERY);
if (((to.to_flags & TOF_TS) != 0) && (to.to_tsecr != 0) &&
TSTMP_GEQ(tcp_now, to.to_tsecr)) {
tcp_xmit_timer(tp,
- tcp_now - to.to_tsecr);
+ tcp_now - to.to_tsecr);
} else if (tp->t_rtttime &&
- SEQ_GT(th->th_ack, tp->t_rtseq)) {
+ SEQ_GT(th->th_ack, tp->t_rtseq)) {
tcp_xmit_timer(tp, tcp_now - tp->t_rtttime);
}
acked = th->th_ack - tp->snd_una;
int32_t, TCP_CC_INSEQ_ACK_RCVD);
sbdrop(&so->so_snd, acked);
+ tcp_sbsnd_trim(&so->so_snd);
+
if (SEQ_GT(tp->snd_una, tp->snd_recover) &&
SEQ_LEQ(th->th_ack, tp->snd_recover))
tp->snd_recover = th->th_ack - 1;
tp->snd_una = th->th_ack;
+
/*
* pull snd_wl2 up to prevent seq wrap relative
* to th_ack.
else if (tp->t_timer[TCPT_PERSIST] == 0)
tp->t_timer[TCPT_REXMT] = OFFSET_FROM_START(tp, tp->t_rxtcur);
+ if ((tp->t_flagsext & TF_MEASURESNDBW) != 0 &&
+ tp->t_bwmeas != NULL)
+ tcp_bwmeas_check(tp);
sowwakeup(so); /* has to be done with socket lock held */
if ((so->so_snd.sb_cc) || (tp->t_flags & TF_ACKNOW)) {
(void) tcp_output(tp);
* with nothing on the reassembly queue and
* we have enough buffer space to take it.
*/
+
+ /*
+ * If this is a connection in steady state, start
+ * coalescing packets belonging to this flow.
+ */
+ if (turnoff_lro) {
+ tcp_lro_remove_state(tp->t_inpcb->inp_laddr,
+ tp->t_inpcb->inp_faddr,
+ tp->t_inpcb->inp_lport,
+ tp->t_inpcb->inp_fport);
+ tp->t_flagsext &= ~TF_LRO_OFFLOADED;
+ tp->t_idleat = tp->rcv_nxt;
+ } else if (sw_lro && !mauxf_sw_lro_pkt && !isipv6 &&
+ (so->so_flags & SOF_USELRO) &&
+ (m->m_pkthdr.rcvif->if_type != IFT_CELLULAR) &&
+ (m->m_pkthdr.rcvif->if_type != IFT_LOOP) &&
+ ((th->th_seq - tp->irs) >
+ (tp->t_maxseg << lro_start)) &&
+ ((tp->t_idleat == 0) || ((th->th_seq -
+ tp->t_idleat) > (tp->t_maxseg << lro_start)))) {
+ tp->t_flagsext |= TF_LRO_OFFLOADED;
+ tcp_start_coalescing(ip, th, tlen);
+ tp->t_idleat = 0;
+ }
+
/* Clean receiver SACK report if present */
if (tp->sack_enable && tp->rcv_numsacks)
tcp_clean_sackreport(tp);
* rcv_nxt.
*/
tp->rcv_up = tp->rcv_nxt;
- tcpstat.tcps_rcvpack++;
+ TCP_INC_VAR(tcpstat.tcps_rcvpack, nlropkts);
tcpstat.tcps_rcvbyte += tlen;
if (nstat_collect) {
- locked_add_64(&inp->inp_stat->rxpackets, 1);
+ if (m->m_pkthdr.aux_flags & MAUXF_SW_LRO_PKT) {
+ locked_add_64(&inp->inp_stat->rxpackets, m->m_pkthdr.lro_npkts);
+ }
+ else {
+ locked_add_64(&inp->inp_stat->rxpackets, 1);
+ }
locked_add_64(&inp->inp_stat->rxbytes, tlen);
}
ND6_HINT(tp); /* some progress has been done */
+
+ tcp_sbrcv_grow(tp, &so->so_rcv, &to, tlen);
+
/*
* Add data to socket buffer.
*/
(((ip->ip_src.s_addr & 0xffff) << 16) | (ip->ip_dst.s_addr & 0xffff)),
th->th_seq, th->th_ack, th->th_win);
}
+ TCP_INC_VAR(tp->t_unacksegs, nlropkts);
if (DELAY_ACK(tp, th)) {
if ((tp->t_flags & TF_DELACK) == 0) {
tp->t_flags |= TF_DELACK;
tp->t_timer[TCPT_DELACK] = OFFSET_FROM_START(tp, tcp_delack);
}
- tp->t_unacksegs++;
} else {
tp->t_flags |= TF_ACKNOW;
tcp_output(tp);
tp->t_keepinit ? tp->t_keepinit : tcp_keepinit);
dropsocket = 0; /* committed to socket */
+ if (inp->inp_flowhash == 0)
+ inp->inp_flowhash = inp_calc_flowhash(inp);
+
/* reset the incomp processing flag */
so->so_flags &= ~(SOF_INCOMP_INPROGRESS);
tcpstat.tcps_accepts++;
/* ECN-setup SYN */
tp->ecn_flags |= (TE_SETUPRECEIVED | TE_SENDIPECT);
}
+
#if CONFIG_IFEF_NOWINDOWSCALE
if (tcp_obey_ifef_nowindowscale && m->m_pkthdr.rcvif != NULL &&
(m->m_pkthdr.rcvif->if_eflags & IFEF_NOWINDOWSCALE)) {
(SEQ_LEQ(th->th_ack, tp->snd_una) ||
SEQ_GT(th->th_ack, tp->snd_max))) {
rstreason = BANDLIM_RST_OPENPORT;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->ooopacket, 1);
+
goto dropwithreset;
}
break;
(SEQ_LEQ(th->th_ack, tp->iss) ||
SEQ_GT(th->th_ack, tp->snd_max))) {
rstreason = BANDLIM_UNLIMITED;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->ooopacket, 1);
+
goto dropwithreset;
}
if (thflags & TH_RST) {
if ((thflags & TH_ACK) != 0) {
+ soevent(so,
+ (SO_FILT_HINT_LOCKED |
+ SO_FILT_HINT_CONNRESET));
tp = tcp_drop(tp, ECONNREFUSED);
postevent(so, 0, EV_RESET);
}
tp->snd_scale = tp->requested_s_scale;
tp->rcv_scale = tp->request_r_scale;
}
- tp->rcv_adv += tp->rcv_wnd;
+ tp->rcv_adv += min(tp->rcv_wnd, TCP_MAXWIN << tp->rcv_scale);
tp->snd_una++; /* SYN is acked */
/*
* If there's data, delay ACK; if there's also a FIN
* ACKNOW will be turned on later.
*/
- if (DELAY_ACK(tp, th) && tlen != 0) {
+ TCP_INC_VAR(tp->t_unacksegs, nlropkts);
+ if (DELAY_ACK(tp, th) && tlen != 0 ) {
if ((tp->t_flags & TF_DELACK) == 0) {
tp->t_flags |= TF_DELACK;
tp->t_timer[TCPT_DELACK] = OFFSET_FROM_START(tp, tcp_delack);
}
- tp->t_unacksegs++;
}
else {
tp->t_flags |= TF_ACKNOW;
* SYN_SENT* --> FIN_WAIT_1
*/
tp->t_starttime = tcp_now;
+ tcp_sbrcv_tstmp_check(tp);
if (tp->t_flags & TF_NEEDFIN) {
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
struct tcpcb *, tp, int32_t, TCPS_FIN_WAIT_1);
switch (tp->t_state) {
case TCPS_SYN_RECEIVED:
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->rstinsynrcv, 1);
so->so_error = ECONNREFUSED;
goto close;
postevent(so, 0, EV_RESET);
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
struct tcpcb *, tp, int32_t, TCPS_CLOSED);
+
+ soevent(so,
+ (SO_FILT_HINT_LOCKED |
+ SO_FILT_HINT_CONNRESET));
+
tp->t_state = TCPS_CLOSED;
tcpstat.tcps_drops++;
tp = tcp_close(tp);
*/
if (tp->t_state == TCPS_SYN_RECEIVED && SEQ_LT(th->th_seq, tp->irs)) {
rstreason = BANDLIM_RST_OPENPORT;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->dospacket, 1);
+
goto dropwithreset;
}
* But keep on processing for RST or ACK.
*/
tp->t_flags |= TF_ACKNOW;
+ if (todrop == 1) {
+ /* This could be a keepalive */
+ soevent(so, SO_FILT_HINT_LOCKED |
+ SO_FILT_HINT_KEEPALIVE);
+ }
todrop = tlen;
tcpstat.tcps_rcvduppack++;
- tcpstat.tcps_rcvdupbyte += todrop;
+ tcpstat.tcps_rcvdupbyte += todrop;
} else {
tcpstat.tcps_rcvpartduppack++;
tcpstat.tcps_rcvpartdupbyte += todrop;
tp = tcp_close(tp);
tcpstat.tcps_rcvafterclose++;
rstreason = BANDLIM_UNLIMITED;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->cleanup, 1);
+
goto dropwithreset;
}
tp = tcp_drop(tp, ECONNRESET);
rstreason = BANDLIM_UNLIMITED;
postevent(so, 0, EV_RESET);
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->synwindow, 1);
+
goto dropwithreset;
}
* SYN-RECEIVED* -> FIN-WAIT-1
*/
tp->t_starttime = tcp_now;
+ tcp_sbrcv_tstmp_check(tp);
if (tp->t_flags & TF_NEEDFIN) {
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
struct tcpcb *, tp, int32_t, TCPS_FIN_WAIT_1);
* before entering FR, call it
*/
if (CC_ALGO(tp)->pre_fr != NULL)
- CC_ALGO(tp)->pre_fr(tp, th);
+ CC_ALGO(tp)->pre_fr(tp);
ENTER_FASTRECOVERY(tp);
tp->snd_recover = tp->snd_max;
tp->t_timer[TCPT_REXMT] = 0;
tp->t_rtttime = 0;
- tp->ecn_flags |= TE_SENDCWR;
+ if ((tp->ecn_flags & TE_ECN_ON) == TE_ECN_ON) {
+ tp->ecn_flags |= TE_SENDCWR;
+ }
if (tp->sack_enable) {
tcpstat.tcps_sack_recovery_episode++;
tp->sack_newdata = tp->snd_nxt;
tp->t_badrxtwin = 0; /* XXX probably not required */
tp->t_rxtshift = 0;
tp->rxt_start = 0;
+ tcp_bad_rexmt_fix_sndbuf(tp);
DTRACE_TCP5(cc, void, NULL, struct inpcb *, inp,
struct tcpcb *, tp, struct tcphdr *, th,
goto step6;
if ((thflags & TH_ECE) != 0 &&
- (tp->ecn_flags & TE_SETUPSENT) != 0) {
+ ((tp->ecn_flags & TE_ECN_ON) == TE_ECN_ON)) {
/*
* Reduce the congestion window if we haven't done so.
*/
if (!tp->sack_enable && !IN_FASTRECOVERY(tp) &&
SEQ_GEQ(th->th_ack, tp->snd_recover)) {
- tcp_reduce_congestion_window(tp, th);
+ tcp_reduce_congestion_window(tp);
DTRACE_TCP5(cc, void, NULL, struct inpcb *, inp,
struct tcpcb *, tp, struct tcphdr *, th,
int32_t, TCP_CC_ECN_RCVD);
ourfinisacked = 1;
} else {
sbdrop(&so->so_snd, acked);
+ tcp_sbsnd_trim(&so->so_snd);
tp->snd_wnd -= acked;
ourfinisacked = 0;
}
}
if (SEQ_LT(tp->snd_nxt, tp->snd_una))
tp->snd_nxt = tp->snd_una;
-
+ if ((tp->t_flagsext & TF_MEASURESNDBW) != 0 &&
+ tp->t_bwmeas != NULL)
+ tcp_bwmeas_check(tp);
+
/*
* sowwakeup must happen after snd_una, et al. are updated so that
* the sequence numbers are in sync with so_snd
if (th->th_seq == tp->rcv_nxt &&
LIST_EMPTY(&tp->t_segq) &&
TCPS_HAVEESTABLISHED(tp->t_state)) {
- if (DELAY_ACK(tp, th) && ((tp->t_flags & TF_ACKNOW) == 0)) {
+ TCP_INC_VAR(tp->t_unacksegs, nlropkts);
+ if (DELAY_ACK(tp, th) &&
+ ((tp->t_flags & TF_ACKNOW) == 0) ) {
if ((tp->t_flags & TF_DELACK) == 0) {
tp->t_flags |= TF_DELACK;
tp->t_timer[TCPT_DELACK] = OFFSET_FROM_START(tp, tcp_delack);
}
- tp->t_unacksegs++;
}
else {
tp->t_flags |= TF_ACKNOW;
}
tp->rcv_nxt += tlen;
thflags = th->th_flags & TH_FIN;
- tcpstat.tcps_rcvpack++;
+ TCP_INC_VAR(tcpstat.tcps_rcvpack, nlropkts);
tcpstat.tcps_rcvbyte += tlen;
if (nstat_collect) {
- locked_add_64(&inp->inp_stat->rxpackets, 1);
+ if (m->m_pkthdr.aux_flags & MAUXF_SW_LRO_PKT) {
+ locked_add_64(&inp->inp_stat->rxpackets, m->m_pkthdr.lro_npkts);
+ } else {
+ locked_add_64(&inp->inp_stat->rxpackets, 1);
+ }
locked_add_64(&inp->inp_stat->rxbytes, tlen);
}
ND6_HINT(tp);
+
+ tcp_sbrcv_grow(tp, &so->so_rcv, &to, tlen);
so_recv_data_stat(so, m, drop_hdrlen);
if (sbappendstream(&so->so_rcv, m))
sorwakeup(so);
}
}
- /*
- * Note the amount of data that peer has sent into
- * our window, in order to estimate the sender's
- * buffer size.
- */
- len = (u_int)(so->so_rcv.sb_hiwat - (tp->rcv_adv - tp->rcv_nxt));
- if (len > so->so_rcv.sb_maxused)
- so->so_rcv.sb_maxused = len;
} else {
m_freem(m);
thflags &= ~TH_FIN;
socantrcvmore(so);
postevent(so, 0, EV_FIN);
/*
- * If connection is half-synchronized
- * (ie NEEDSYN flag on) then delay ACK,
* If connection is half-synchronized
* (ie NEEDSYN flag on) then delay ACK,
* so it may be piggybacked when SYN is sent.
* Otherwise, since we received a FIN then no
* more input can be expected, send ACK now.
*/
+ TCP_INC_VAR(tp->t_unacksegs, nlropkts);
if (DELAY_ACK(tp, th) && (tp->t_flags & TF_NEEDSYN)) {
if ((tp->t_flags & TF_DELACK) == 0) {
tp->t_flags |= TF_DELACK;
tp->t_timer[TCPT_DELACK] = OFFSET_FROM_START(tp, tcp_delack);
}
- tp->t_unacksegs++;
}
else {
tp->t_flags |= TF_ACKNOW;
(SEQ_GT(tp->snd_una, th->th_ack) ||
SEQ_GT(th->th_ack, tp->snd_max)) ) {
rstreason = BANDLIM_RST_OPENPORT;
+
+ if (ifp != NULL && ifp->if_tcp_stat != NULL)
+ atomic_add_64(&ifp->if_tcp_stat->dospacket, 1);
+
goto dropwithreset;
}
#if TCPDEBUG
delta -= tp->t_rttvar >> (TCP_RTTVAR_SHIFT - TCP_DELTA_SHIFT);
if ((tp->t_rttvar += delta) <= 0)
tp->t_rttvar = 1;
- if (tp->t_rttbest > tp->t_srtt + tp->t_rttvar)
- tp->t_rttbest = tp->t_srtt + tp->t_rttvar;
+ if (tp->t_rttbest == 0 ||
+ tp->t_rttbest > (tp->t_srtt + tp->t_rttvar))
+ tp->t_rttbest = tp->t_srtt + tp->t_rttvar;
} else {
/*
* No rtt measurement yet - use the unsmoothed rtt.
*/
tp->t_srtt = rtt << TCP_RTT_SHIFT;
tp->t_rttvar = rtt << (TCP_RTTVAR_SHIFT - 1);
- tp->t_rttbest = tp->t_srtt + tp->t_rttvar;
}
nstat_route_rtt(tp->t_inpcb->inp_route.ro_rt, tp->t_srtt, tp->t_rttvar);
tp->t_rtttime = 0;
tcp_maxmtu6(struct rtentry *rt)
{
unsigned int maxmtu;
+ struct nd_ifinfo *ndi;
RT_LOCK_ASSERT_HELD(rt);
lck_rw_lock_shared(nd_if_rwlock);
+ if ((ndi = ND_IFINFO(rt->rt_ifp)) != NULL && !ndi->initialized)
+ ndi = NULL;
+ if (ndi != NULL)
+ lck_mtx_lock(&ndi->lock);
if (rt->rt_rmx.rmx_mtu == 0)
maxmtu = IN6_LINKMTU(rt->rt_ifp);
else
maxmtu = MIN(rt->rt_rmx.rmx_mtu, IN6_LINKMTU(rt->rt_ifp));
+ if (ndi != NULL)
+ lck_mtx_unlock(&ndi->lock);
lck_rw_done(nd_if_rwlock);
return (maxmtu);
* or rttvar. Convert from the route-table units
* to scaled multiples of the slow timeout timer.
*/
- if (tp->t_srtt == 0 && (rtt = rt->rt_rmx.rmx_rtt)) {
- /*
- * XXX the lock bit for RTT indicates that the value
- * is also a minimum value; this is subject to time.
- */
- if (rt->rt_rmx.rmx_locks & RTV_RTT)
- tp->t_rttmin = rtt / (RTM_RTTUNIT / TCP_RETRANSHZ);
- else
- tp->t_rttmin = isnetlocal ? tcp_TCPTV_MIN : TCPTV_REXMTMIN;
- tp->t_srtt = rtt / (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTT_SCALE));
- tcpstat.tcps_usedrtt++;
- if (rt->rt_rmx.rmx_rttvar) {
- tp->t_rttvar = rt->rt_rmx.rmx_rttvar /
- (RTM_RTTUNIT / (TCP_RETRANSHZ * TCP_RTTVAR_SCALE));
- tcpstat.tcps_usedrttvar++;
- } else {
- /* default variation is +- 1 rtt */
- tp->t_rttvar =
- tp->t_srtt * TCP_RTTVAR_SCALE / TCP_RTT_SCALE;
- }
- TCPT_RANGESET(tp->t_rxtcur,
- ((tp->t_srtt >> 2) + tp->t_rttvar) >> 1,
- tp->t_rttmin, TCPTV_REXMTMAX,
- TCP_ADD_REXMTSLOP(tp));
- }
- else
+ if (tp->t_srtt == 0 && (rtt = rt->rt_rmx.rmx_rtt) != 0) {
+ tcp_getrt_rtt(tp, rt);
+ } else {
tp->t_rttmin = isnetlocal ? tcp_TCPTV_MIN : TCPTV_REXMTMIN;
+ }
#if INET6
mss = (isipv6 ? tcp_maxmtu6(rt) : tcp_maxmtu(rt));
lck_rw_lock_exclusive(tcbinfo.mtx);
tcp_lock(so, 0, 0);
-
/* Release the reference held for so_incomp queue */
so->so_usecount--;
}
}
+void
+tcp_set_recv_bg(struct socket *so)
+{
+ if (!IS_TCP_RECV_BG(so))
+ so->so_traffic_mgt_flags |= TRAFFIC_MGT_TCP_RECVBG;
+}
+
+void
+tcp_clear_recv_bg(struct socket *so)
+{
+ if (IS_TCP_RECV_BG(so))
+ so->so_traffic_mgt_flags &= ~(TRAFFIC_MGT_TCP_RECVBG);
+}
+
+void
+inp_fc_unthrottle_tcp(struct inpcb *inp)
+{
+ struct tcpcb *tp = inp->inp_ppcb;
+ /*
+ * Back off the slow-start threshold and enter
+ * congestion avoidance phase
+ */
+ if (CC_ALGO(tp)->pre_fr != NULL)
+ CC_ALGO(tp)->pre_fr(tp);
+
+ tp->snd_cwnd = tp->snd_ssthresh;
+
+ /*
+ * Restart counting for ABC as we changed the
+ * congestion window just now.
+ */
+ tp->t_bytes_acked = 0;
+
+ /* Reset retransmit shift as we know that the reason
+ * for delay in sending a packet is due to flow
+ * control on the outgoing interface. There is no need
+ * to backoff retransmit timer.
+ */
+ tp->t_rxtshift = 0;
+
+ /*
+ * Start the output stream again. Since we are
+ * not retransmitting data, do not reset the
+ * retransmit timer or rtt calculation.
+ */
+ tcp_output(tp);
+}
+
static int
tcp_getstat SYSCTL_HANDLER_ARGS
{
projects / apple / xnu.git / blobdiff