#include <sys/sysctl.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
-#include <sys/proc.h> /* for proc0 declaration */
+#include <sys/proc.h> /* for proc0 declaration */
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/kasl.h>
#endif
#include <sys/kauth.h>
-#include <kern/cpu_number.h> /* before tcp_seq.h, for tcp_random18() */
+#include <kern/cpu_number.h> /* before tcp_seq.h, for tcp_random18() */
#include <machine/endian.h>
#include <netinet/ip.h>
#include <netinet/ip_icmp.h> /* for ICMP_BANDLIM */
#include <netinet/in_var.h>
-#include <netinet/icmp_var.h> /* for ICMP_BANDLIM */
+#include <netinet/icmp_var.h> /* for ICMP_BANDLIM */
#include <netinet/in_pcb.h>
#include <netinet/ip_var.h>
#include <mach/sdt.h>
#include <corecrypto/ccaes.h>
-#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETTCP, 0)
-#define DBG_LAYER_END NETDBG_CODE(DBG_NETTCP, 2)
+#define DBG_LAYER_BEG NETDBG_CODE(DBG_NETTCP, 0)
+#define DBG_LAYER_END NETDBG_CODE(DBG_NETTCP, 2)
#define DBG_FNC_TCP_INPUT NETDBG_CODE(DBG_NETTCP, (3 << 8))
#define DBG_FNC_TCP_NEWCONN NETDBG_CODE(DBG_NETTCP, (7 << 8))
-#define TCP_RTT_HISTORY_EXPIRE_TIME (60 * TCP_RETRANSHZ)
-#define TCP_RECV_THROTTLE_WIN (5 * TCP_RETRANSHZ)
-#define TCP_STRETCHACK_ENABLE_PKTCNT 2000
+#define TCP_RTT_HISTORY_EXPIRE_TIME (60 * TCP_RETRANSHZ)
+#define TCP_RECV_THROTTLE_WIN (5 * TCP_RETRANSHZ)
+#define TCP_STRETCHACK_ENABLE_PKTCNT 2000
-struct tcpstat tcpstat;
+struct tcpstat tcpstat;
static int log_in_vain = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, log_in_vain,
"Drop TCP packets with SYN+FIN set");
#endif
-SYSCTL_NODE(_net_inet_tcp, OID_AUTO, reass, CTLFLAG_RW|CTLFLAG_LOCKED, 0,
+SYSCTL_NODE(_net_inet_tcp, OID_AUTO, reass, CTLFLAG_RW | CTLFLAG_LOCKED, 0,
"TCP Segment Reassembly Queue");
static int tcp_reass_overflows = 0;
SYSCTL_SKMEM_TCP_INT(OID_AUTO, slowlink_wsize, CTLFLAG_RW | CTLFLAG_LOCKED,
- __private_extern__ int, slowlink_wsize, 8192,
- "Maximum advertised window size for slowlink");
+ __private_extern__ int, slowlink_wsize, 8192,
+ "Maximum advertised window size for slowlink");
SYSCTL_SKMEM_TCP_INT(OID_AUTO, maxseg_unacked,
CTLFLAG_RW | CTLFLAG_LOCKED, int, maxseg_unacked, 8,
int sw_lro = 1;
#else
int sw_lro = 0;
-#endif /* !CONFIG_EMBEDDED */
+#endif /* !CONFIG_EMBEDDED */
SYSCTL_INT(_net_inet_tcp, OID_AUTO, lro, CTLFLAG_RW | CTLFLAG_LOCKED,
- &sw_lro, 0, "Used to coalesce TCP packets");
+ &sw_lro, 0, "Used to coalesce TCP packets");
int lrodebug = 0;
SYSCTL_INT(_net_inet_tcp, OID_AUTO, lrodbg,
int tcprexmtthresh = 3;
u_int32_t tcp_now;
-struct timeval tcp_uptime; /* uptime when tcp_now was last updated */
-lck_spin_t *tcp_uptime_lock; /* Used to sychronize updates to tcp_now */
+struct timeval tcp_uptime; /* uptime when tcp_now was last updated */
+lck_spin_t *tcp_uptime_lock; /* Used to sychronize updates to tcp_now */
struct inpcbhead tcb;
-#define tcb6 tcb /* for KAME src sync over BSD*'s */
+#define tcb6 tcb /* for KAME src sync over BSD*'s */
struct inpcbinfo tcbinfo;
static void tcp_dooptions(struct tcpcb *, u_char *, int, struct tcphdr *,
#define TCP_EARLY_REXMT_WIN (60 * TCP_RETRANSHZ) /* 60 seconds */
#define TCP_EARLY_REXMT_LIMIT 10
-extern void ipfwsyslog( int level, const char *format,...);
+extern void ipfwsyslog( int level, const char *format, ...);
extern int fw_verbose;
#if IPFIREWALL
extern void ipfw_stealth_stats_incr_tcp(void);
#define log_in_vain_log( a ) { \
- if ( (log_in_vain == 3 ) && (fw_verbose == 2)) { /* Apple logging, log to ipfw.log */ \
- ipfwsyslog a ; \
- } else if ( (log_in_vain == 4 ) && (fw_verbose == 2)) { \
- ipfw_stealth_stats_incr_tcp(); \
- } \
- else log a ; \
+ if ( (log_in_vain == 3 ) && (fw_verbose == 2)) { /* Apple logging, log to ipfw.log */ \
+ ipfwsyslog a ; \
+ } else if ( (log_in_vain == 4 ) && (fw_verbose == 2)) { \
+ ipfw_stealth_stats_incr_tcp(); \
+ } \
+ else log a ; \
}
#else
#define log_in_vain_log( a ) { log a; }
int tcp_rcvunackwin = TCPTV_UNACKWIN;
int tcp_maxrcvidle = TCPTV_MAXRCVIDLE;
SYSCTL_SKMEM_TCP_INT(OID_AUTO, rcvsspktcnt, CTLFLAG_RW | CTLFLAG_LOCKED,
- int, tcp_rcvsspktcnt, TCP_RCV_SS_PKTCOUNT, "packets to be seen before receiver stretches acks");
+ int, tcp_rcvsspktcnt, TCP_RCV_SS_PKTCOUNT, "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))
static inline void
update_iaj_state(struct tcpcb *tp, uint32_t size, int rst_size)
{
- if (rst_size > 0)
+ if (rst_size > 0) {
tp->iaj_size = 0;
+ }
if (tp->iaj_size == 0 || size >= tp->iaj_size) {
tp->iaj_size = size;
tp->iaj_rcv_ts = tcp_now;
isqrt(unsigned int val)
{
unsigned int sqrt_cache[11] = {0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100};
- unsigned int temp, g=0, b=0x8000, bshft=15;
- if ( val <= 100) {
+ unsigned int temp, g = 0, b = 0x8000, bshft = 15;
+ if (val <= 100) {
for (g = 0; g <= 10; ++g) {
if (sqrt_cache[g] > val) {
g--;
val -= temp;
}
b >>= 1;
- } while ( b > 0 && val > 0);
+ } while (b > 0 && val > 0);
}
- return(g);
+ return g;
}
/*
-* With LRO, roughly estimate the inter arrival time between
-* each sub coalesced packet as an average. Count the delay
-* cur_iaj to be the delay between the last packet received
-* and the first packet of the LRO stream. Due to round off errors
-* cur_iaj may be the same as lro_delay_factor. Averaging has
-* round off errors too. lro_delay_factor may be close to 0
-* in steady state leading to lower values fed to compute_iaj_meat.
-*/
+ * With LRO, roughly estimate the inter arrival time between
+ * each sub coalesced packet as an average. Count the delay
+ * cur_iaj to be the delay between the last packet received
+ * and the first packet of the LRO stream. Due to round off errors
+ * cur_iaj may be the same as lro_delay_factor. Averaging has
+ * round off errors too. lro_delay_factor may be close to 0
+ * in steady state leading to lower values fed to compute_iaj_meat.
+ */
void
compute_iaj(struct tcpcb *tp, int nlropkts, int lro_delay_factor)
{
compute_iaj_meat(tp, cur_iaj);
- if (nlropkts <= 1)
+ if (nlropkts <= 1) {
return;
+ }
nlropkts--;
- timediff = lro_delay_factor/nlropkts;
+ timediff = lro_delay_factor / nlropkts;
- while (nlropkts > 0)
- {
+ while (nlropkts > 0) {
compute_iaj_meat(tp, timediff);
nlropkts--;
}
}
static
-void compute_iaj_meat(struct tcpcb *tp, uint32_t cur_iaj)
+void
+compute_iaj_meat(struct tcpcb *tp, uint32_t cur_iaj)
{
/* When accumulated IAJ reaches MAX_ACC_IAJ in milliseconds,
* throttle the receive window to a minimum of MIN_IAJ_WIN packets
* using standard deviation.
*/
allowed_iaj = tp->avg_iaj + tp->std_dev_iaj;
- if (allowed_iaj < tcp_allowed_iaj)
+ if (allowed_iaj < tcp_allowed_iaj) {
allowed_iaj = tcp_allowed_iaj;
+ }
/* Initially when the connection starts, the senders congestion
* window is small. During this period we avoid throttling a
* the first few packets.
*/
if (tp->iaj_pktcnt > IAJ_IGNORE_PKTCNT) {
- if ( cur_iaj <= allowed_iaj ) {
- if (tp->acc_iaj >= 2)
+ if (cur_iaj <= allowed_iaj) {
+ if (tp->acc_iaj >= 2) {
acc_iaj = tp->acc_iaj - 2;
- else
+ } else {
acc_iaj = 0;
-
+ }
} else {
acc_iaj = tp->acc_iaj + (cur_iaj - allowed_iaj);
}
- if (acc_iaj > MAX_ACC_IAJ)
+ if (acc_iaj > MAX_ACC_IAJ) {
acc_iaj = MAX_ACC_IAJ;
+ }
tp->acc_iaj = acc_iaj;
}
* instead of round-down
*/
tp->avg_iaj = (((tp->avg_iaj << IAJ_DIV_SHIFT) - tp->avg_iaj)
- + cur_iaj + IAJ_ROUNDUP_CONST) >> IAJ_DIV_SHIFT;
+ + cur_iaj + IAJ_ROUNDUP_CONST) >> IAJ_DIV_SHIFT;
/* Compute Root-mean-square of deviation where mean is a weighted
* average as described above.
*/
temp = tp->std_dev_iaj * tp->std_dev_iaj;
mean = (((temp << IAJ_DIV_SHIFT) - temp)
- + (cur_iaj_dev * cur_iaj_dev)
- + IAJ_ROUNDUP_CONST) >> IAJ_DIV_SHIFT;
+ + (cur_iaj_dev * cur_iaj_dev)
+ + IAJ_ROUNDUP_CONST) >> IAJ_DIV_SHIFT;
tp->std_dev_iaj = isqrt(mean);
DTRACE_TCP3(iaj, struct tcpcb *, tp, uint32_t, cur_iaj,
- uint32_t, allowed_iaj);
+ uint32_t, allowed_iaj);
return;
}
}
/* Careful about wrap-around */
- if (ret == FALSE && (tp->t_challengeack_count + 1 > 0))
+ if (ret == FALSE && (tp->t_challengeack_count + 1 > 0)) {
tp->t_challengeack_count++;
+ }
- return (ret);
+ return ret;
}
/* Check if enough amount of data has been acknowledged since
int32_t bw_meas_bytes;
uint32_t bw, bytes, elapsed_time;
- if (SEQ_LEQ(tp->snd_una, tp->t_bwmeas->bw_start))
+ if (SEQ_LEQ(tp->snd_una, tp->t_bwmeas->bw_start)) {
return;
+ }
bw_meas_bytes = tp->snd_una - tp->t_bwmeas->bw_start;
if ((tp->t_flagsext & TF_BWMEAS_INPROGRESS) &&
elapsed_time = tcp_now - tp->t_bwmeas->bw_ts;
if (elapsed_time > 0) {
bw = bytes / elapsed_time;
- if ( bw > 0) {
+ if (bw > 0) {
if (tp->t_bwmeas->bw_sndbw > 0) {
tp->t_bwmeas->bw_sndbw =
(((tp->t_bwmeas->bw_sndbw << 3)
* Call with th==0 after become established to
* force pre-ESTABLISHED data up to user socket.
*/
- if (th == NULL)
+ if (th == NULL) {
goto present;
+ }
/*
* If the reassembly queue already has entries or if we are going
tcp_reset_stretch_ack(tp);
#if TRAFFIC_MGT
- if (tp->acc_iaj > 0)
+ if (tp->acc_iaj > 0) {
reset_acc_iaj(tp);
+ }
#endif /* TRAFFIC_MGT */
/*
tcpstat.tcps_rcvmemdrop++;
m_freem(m);
*tlenp = 0;
- return (0);
+ return 0;
}
/* Allocate a new queue entry. If we can't, just drop the pkt. XXX */
if (te == NULL) {
tcpstat.tcps_rcvmemdrop++;
m_freem(m);
- return (0);
+ return 0;
}
tp->t_reassqlen++;
* Find a segment which begins after this one does.
*/
LIST_FOREACH(q, &tp->t_segq, tqe_q) {
- if (SEQ_GT(q->tqe_th->th_seq, th->th_seq))
+ if (SEQ_GT(q->tqe_th->th_seq, th->th_seq)) {
break;
+ }
p = q;
}
*/
while (q) {
int i = (th->th_seq + *tlenp) - q->tqe_th->th_seq;
- if (i <= 0)
+ if (i <= 0) {
break;
+ }
/*
* Report only the first part of partial/non-contiguous
* can be copied off to sockbuf after in-order data
* is copied off.
*/
- if (!(so->so_state & SS_CANTRCVMORE))
+ if (!(so->so_state & SS_CANTRCVMORE)) {
copy_oodata = 1;
+ }
present:
/*
* Present data to user, advancing rcv_nxt through
* completed sequence space.
*/
- if (!TCPS_HAVEESTABLISHED(tp->t_state))
- return (0);
+ if (!TCPS_HAVEESTABLISHED(tp->t_state)) {
+ return 0;
+ }
q = LIST_FIRST(&tp->t_segq);
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(inp->inp_laddr, inp->inp_faddr,
- th->th_dport, th->th_sport);
+ th->th_dport, th->th_sport);
tp->t_flagsext &= ~TF_LRO_OFFLOADED;
}
* continue processing if out-of-order data
* can be delivered
*/
- if (q && (so->so_flags & SOF_ENABLE_MSGS))
+ if (q && (so->so_flags & SOF_ENABLE_MSGS)) {
goto msg_unordered_delivery;
+ }
- return (0);
+ return 0;
}
/*
* connection, it is better to let it finish the job --
* (radar 16316196)
*/
- if (tp->t_flagsext & TF_REASS_INPROG)
- return (0);
+ if (tp->t_flagsext & TF_REASS_INPROG) {
+ return 0;
+ }
tp->t_flagsext |= TF_REASS_INPROG;
/* lost packet was recovered, so ooo data can be returned */
* the received data filled a gap, and
* is now in order!
*/
- if (q == te)
+ if (q == te) {
copy_oodata = 0;
+ }
}
if (sbappendstream_rcvdemux(so, q->tqe_m,
- q->tqe_th->th_seq - (tp->irs + 1), 0))
+ q->tqe_th->th_seq - (tp->irs + 1), 0)) {
dowakeup = 1;
+ }
if (tp->t_flagsext & TF_LRO_OFFLOADED) {
tcp_update_lro_seq(tp->rcv_nxt,
- inp->inp_laddr, inp->inp_faddr,
- th->th_dport, th->th_sport);
+ inp->inp_laddr, inp->inp_faddr,
+ th->th_dport, th->th_sport);
}
}
zfree(tcp_reass_zone, q);
#if INET6
if ((inp->inp_vflag & INP_IPV6) != 0) {
-
KERNEL_DEBUG(DBG_LAYER_BEG,
- ((inp->inp_fport << 16) | inp->inp_lport),
- (((inp->in6p_laddr.s6_addr16[0] & 0xffff) << 16) |
- (inp->in6p_faddr.s6_addr16[0] & 0xffff)),
- 0,0,0);
- }
- else
+ ((inp->inp_fport << 16) | inp->inp_lport),
+ (((inp->in6p_laddr.s6_addr16[0] & 0xffff) << 16) |
+ (inp->in6p_faddr.s6_addr16[0] & 0xffff)),
+ 0, 0, 0);
+ } else
#endif
{
KERNEL_DEBUG(DBG_LAYER_BEG,
- ((inp->inp_fport << 16) | inp->inp_lport),
- (((inp->inp_laddr.s_addr & 0xffff) << 16) |
- (inp->inp_faddr.s_addr & 0xffff)),
- 0,0,0);
+ ((inp->inp_fport << 16) | inp->inp_lport),
+ (((inp->inp_laddr.s_addr & 0xffff) << 16) |
+ (inp->inp_faddr.s_addr & 0xffff)),
+ 0, 0, 0);
}
msg_unordered_delivery:
oodata = m_copym(te->tqe_m, 0, M_COPYALL, M_DONTWAIT);
if (oodata != NULL) {
if (sbappendmsgstream_rcv(&so->so_rcv, oodata,
- te->tqe_th->th_seq - (tp->irs + 1), 1)) {
+ te->tqe_th->th_seq - (tp->irs + 1), 1)) {
dowakeup = 1;
tcpstat.tcps_msg_unopkts++;
} else {
}
}
- if (dowakeup)
+ if (dowakeup) {
sorwakeup(so); /* done with socket lock held */
- return (flags);
+ }
+ return flags;
}
/*
*/
static void
tcp_reduce_congestion_window(
- struct tcpcb *tp)
+ struct tcpcb *tp)
{
/*
* If the current tcp cc module has
* defined a hook for tasks to run
* before entering FR, call it
*/
- if (CC_ALGO(tp)->pre_fr != NULL)
+ if (CC_ALGO(tp)->pre_fr != NULL) {
CC_ALGO(tp)->pre_fr(tp);
+ }
ENTER_FASTRECOVERY(tp);
- if (tp->t_flags & TF_SENTFIN)
+ if (tp->t_flags & TF_SENTFIN) {
tp->snd_recover = tp->snd_max - 1;
- else
+ } else {
tp->snd_recover = tp->snd_max;
+ }
tp->t_timer[TCPT_REXMT] = 0;
tp->t_timer[TCPT_PTO] = 0;
tp->t_rtttime = 0;
&& tlen > 0 &&
tp->t_state == TCPS_ESTABLISHED) {
tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
- (TCP_REXMTVAL(tp) << 1));
+ (TCP_REXMTVAL(tp) << 1));
tp->t_flagsext |= TF_DETECT_READSTALL;
tp->t_rtimo_probes = 0;
}
tcp_keepalive_reset(struct tcpcb *tp)
{
tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
- TCP_CONN_KEEPIDLE(tp));
+ TCP_CONN_KEEPIDLE(tp));
tp->t_flagsext &= ~(TF_DETECT_READSTALL);
tp->t_rtimo_probes = 0;
}
IF_TCP_STATINC(ifp, icmp6unreach);
- return (IPPROTO_DONE);
+ return IPPROTO_DONE;
}
}
tcp_input(m, *offp);
- return (IPPROTO_DONE);
+ return IPPROTO_DONE;
}
#endif
u_int32_t sbspacelim = ((nmbclusters >> 4) << MCLSHIFT);
if ((total_sbmb_cnt < mblim) &&
- (sb->sb_hiwat < sbspacelim)) {
- return(1);
+ (sb->sb_hiwat < sbspacelim)) {
+ return 1;
} else {
OSIncrementAtomic64(&sbmb_limreached);
}
- return(0);
+ return 0;
}
static void
tcp_sbrcv_reserve(struct tcpcb *tp, struct sockbuf *sbrcv,
- u_int32_t newsize, u_int32_t idealsize, u_int32_t rcvbuf_max)
+ u_int32_t newsize, u_int32_t idealsize, u_int32_t rcvbuf_max)
{
/* newsize should not exceed max */
newsize = min(newsize, rcvbuf_max);
/* Set new socket buffer size */
if (newsize > sbrcv->sb_hiwat &&
- (sbreserve(sbrcv, newsize) == 1)) {
+ (sbreserve(sbrcv, newsize) == 1)) {
sbrcv->sb_idealsize = min(max(sbrcv->sb_idealsize,
(idealsize != 0) ? idealsize : newsize), rcvbuf_max);
* window scale
*/
sbrcv->sb_idealsize = min(sbrcv->sb_idealsize,
- TCP_MAXWIN << tp->rcv_scale);
+ TCP_MAXWIN << tp->rcv_scale);
}
}
*/
static void
tcp_sbrcv_grow(struct tcpcb *tp, struct sockbuf *sbrcv,
- struct tcpopt *to, u_int32_t pktlen, u_int32_t rcvbuf_max)
+ struct tcpopt *to, u_int32_t pktlen, u_int32_t rcvbuf_max)
{
struct socket *so = sbrcv->sb_so;
* recovery should not change the receive window
*/
if (tcp_do_autorcvbuf == 0 ||
- (sbrcv->sb_flags & SB_AUTOSIZE) == 0 ||
- tcp_cansbgrow(sbrcv) == 0 ||
- sbrcv->sb_hiwat >= rcvbuf_max ||
- (tp->t_flagsext & TF_RECV_THROTTLE) ||
- (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) ||
- !LIST_EMPTY(&tp->t_segq)) {
+ (sbrcv->sb_flags & SB_AUTOSIZE) == 0 ||
+ tcp_cansbgrow(sbrcv) == 0 ||
+ sbrcv->sb_hiwat >= rcvbuf_max ||
+ (tp->t_flagsext & TF_RECV_THROTTLE) ||
+ (so->so_flags1 & SOF1_EXTEND_BK_IDLE_WANTED) ||
+ !LIST_EMPTY(&tp->t_segq)) {
/* Can not resize the socket buffer, just return */
goto out;
}
if (TSTMP_GT(tcp_now,
- tp->rfbuf_ts + TCPTV_RCVBUFIDLE)) {
+ tp->rfbuf_ts + TCPTV_RCVBUFIDLE)) {
/* If there has been an idle period in the
* connection, just restart the measurement
*/
* the high water mark.
*/
if (TSTMP_GEQ(tcp_now,
- tp->rfbuf_ts + TCPTV_RCVNOTS_QUANTUM)) {
+ tp->rfbuf_ts + TCPTV_RCVNOTS_QUANTUM)) {
if (tp->rfbuf_cnt >= TCP_RCVNOTS_BYTELEVEL) {
tcp_sbrcv_reserve(tp, sbrcv,
tcp_autorcvbuf_max, 0,
*/
if (TSTMP_GEQ(to->to_tsecr, tp->rfbuf_ts)) {
if (tp->rfbuf_cnt > (sbrcv->sb_hiwat -
- (sbrcv->sb_hiwat >> 1))) {
+ (sbrcv->sb_hiwat >> 1))) {
int32_t rcvbuf_inc, min_incr;
/*
* Increment the receive window by a
* at least
*/
min_incr = tp->t_maxseg << tcp_autorcvbuf_inc_shift;
- if (rcvbuf_inc < min_incr)
+ if (rcvbuf_inc < min_incr) {
rcvbuf_inc = min_incr;
+ }
rcvbuf_inc =
(rcvbuf_inc / tp->t_maxseg) * tp->t_maxseg;
tp->t_bwmeas->bw_rcvbw_max = rcv_bw;
} else {
tp->t_bwmeas->bw_rcvbw_max = max(
- tp->t_bwmeas->bw_rcvbw_max, rcv_bw);
+ tp->t_bwmeas->bw_rcvbw_max, rcv_bw);
}
}
goto out;
tcp_sbrcv_trim(struct tcpcb *tp, struct sockbuf *sbrcv)
{
if (tcp_do_autorcvbuf == 1 && sbrcv->sb_idealsize > 0 &&
- sbrcv->sb_hiwat > sbrcv->sb_idealsize) {
+ 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;
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.
+ * a few segments worth of space.
*/
- if (leave == 0)
+ 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)
+ if (trim > 0) {
sbreserve(sbrcv, (sbrcv->sb_hiwat - trim));
+ }
}
}
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)) {
+ ((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;
}
sbreserve(sbsnd, (sbsnd->sb_hiwat - trim));
}
- if (sbsnd->sb_hiwat <= sbsnd->sb_idealsize)
+ if (sbsnd->sb_hiwat <= sbsnd->sb_idealsize) {
sbsnd->sb_flags &= ~(SB_TRIM);
+ }
}
/*
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) {
+ (TF_REQ_TSTMP | TF_RCVD_TSTMP) &&
+ (sbrcv->sb_flags & SB_AUTOSIZE) != 0) {
tcp_sbrcv_reserve(tp, sbrcv, newsize, 0, newsize);
}
}
tcp_stretch_ack_enable(struct tcpcb *tp, int thflags)
{
if (tp->rcv_by_unackwin >= (maxseg_unacked * tp->t_maxseg) &&
- TSTMP_GEQ(tp->rcv_unackwin, tcp_now))
+ TSTMP_GEQ(tp->rcv_unackwin, tcp_now)) {
tp->t_flags |= TF_STREAMING_ON;
- else
+ } else {
tp->t_flags &= ~TF_STREAMING_ON;
+ }
/* If there has been an idle time, reset streaming detection */
- if (TSTMP_GT(tcp_now, tp->rcv_unackwin + tcp_maxrcvidle))
+ if (TSTMP_GT(tcp_now, tp->rcv_unackwin + tcp_maxrcvidle)) {
tp->t_flags &= ~TF_STREAMING_ON;
+ }
/*
* If there are flags other than TH_ACK set, reset streaming
* detection
*/
- if (thflags & ~TH_ACK)
+ if (thflags & ~TH_ACK) {
tp->t_flags &= ~TF_STREAMING_ON;
+ }
if (tp->t_flagsext & TF_DISABLE_STRETCHACK) {
if (tp->rcv_nostrack_pkts >= TCP_STRETCHACK_ENABLE_PKTCNT) {
}
}
- if (!(tp->t_flagsext & (TF_NOSTRETCHACK|TF_DISABLE_STRETCHACK)) &&
+ if (!(tp->t_flagsext & (TF_NOSTRETCHACK | TF_DISABLE_STRETCHACK)) &&
(tp->t_flags & TF_STREAMING_ON) &&
(!(tp->t_flagsext & TF_RCVUNACK_WAITSS) ||
(tp->rcv_waitforss >= tcp_rcvsspktcnt))) {
- return(1);
+ return 1;
}
- return(0);
+ return 0;
}
/*
void
tcp_reset_stretch_ack(struct tcpcb *tp)
{
- tp->t_flags &= ~(TF_STRETCHACK|TF_STREAMING_ON);
+ tp->t_flags &= ~(TF_STRETCHACK | TF_STREAMING_ON);
tp->rcv_by_unackwin = 0;
tp->rcv_unackwin = tcp_now + tcp_rcvunackwin;
*/
int
tcp_detect_bad_rexmt(struct tcpcb *tp, struct tcphdr *th,
- struct tcpopt *to, u_int32_t rxtime)
+ struct tcpopt *to, u_int32_t rxtime)
{
int32_t tdiff, bad_rexmt_win;
bad_rexmt_win = (tp->t_srtt >> (TCP_RTT_SHIFT + 1));
/* If the ack has ECN CE bit, then cwnd has to be adjusted */
- if (TCP_ECN_ENABLED(tp) && (th->th_flags & TH_ECE))
- return (0);
+ if (TCP_ECN_ENABLED(tp) && (th->th_flags & TH_ECE)) {
+ return 0;
+ }
if (TSTMP_SUPPORTED(tp)) {
if (rxtime > 0 && (to->to_flags & TOF_TS)
&& to->to_tsecr != 0
- && TSTMP_LT(to->to_tsecr, rxtime))
- return (1);
+ && TSTMP_LT(to->to_tsecr, rxtime)) {
+ return 1;
+ }
} else {
if ((tp->t_rxtshift == 1
|| (tp->t_flagsext & TF_SENT_TLPROBE))
&& rxtime > 0) {
tdiff = (int32_t)(tcp_now - rxtime);
- if (tdiff < bad_rexmt_win)
- return(1);
+ if (tdiff < bad_rexmt_win) {
+ return 1;
+ }
}
}
- return(0);
+ return 0;
}
tp->snd_ssthresh = tp->snd_ssthresh_prev;
/* Initialize cwnd to the initial window */
- if (CC_ALGO(tp)->cwnd_init != NULL)
+ if (CC_ALGO(tp)->cwnd_init != NULL) {
CC_ALGO(tp)->cwnd_init(tp);
+ }
tp->snd_cwnd = fsize + min(acked, tp->snd_cwnd);
-
} else {
tp->snd_cwnd = tp->snd_cwnd_prev;
tp->snd_ssthresh = tp->snd_ssthresh_prev;
- if (tp->t_flags & TF_WASFRECOVERY)
+ if (tp->t_flags & TF_WASFRECOVERY) {
ENTER_FASTRECOVERY(tp);
+ }
/* Do not use the loss flight size in this case */
tp->t_lossflightsize = 0;
tcp_pmtud_revert_segment_size(tp);
}
}
- if (tp->t_pmtud_start_ts > 0)
+ if (tp->t_pmtud_start_ts > 0) {
tp->t_pmtud_start_ts = 0;
+ }
}
/*
* packet reordering.
*/
static void
-tcp_early_rexmt_check (struct tcpcb *tp, struct tcphdr *th)
+tcp_early_rexmt_check(struct tcpcb *tp, struct tcphdr *th)
{
u_int32_t obytes, snd_off;
int32_t snd_len;
if (SACK_ENABLED(tp) &&
!TAILQ_EMPTY(&tp->snd_holes)) {
obytes = (tp->snd_max - tp->snd_fack) +
- tp->sackhint.sack_bytes_rexmit;
+ tp->sackhint.sack_bytes_rexmit;
} else {
obytes = (tp->snd_max - tp->snd_una);
}
u_int32_t osegs;
osegs = obytes / tp->t_maxseg;
- if ((osegs * tp->t_maxseg) < obytes)
+ if ((osegs * tp->t_maxseg) < obytes) {
osegs++;
+ }
/*
* Since the connection might have already
tp->t_rexmtthresh =
max(tp->t_rexmtthresh, tp->t_dupacks);
- if (tp->t_early_rexmt_count == 0)
+ if (tp->t_early_rexmt_count == 0) {
tp->t_early_rexmt_win = tcp_now;
+ }
if (tp->t_flagsext & TF_SENT_TLPROBE) {
tcpstat.tcps_tlp_recovery++;
unsigned char len;
if (!(to->to_flags & (TOF_TFO | TOF_TFOREQ)) ||
- !(tcp_fastopen & TCP_FASTOPEN_SERVER))
- return (FALSE);
+ !(tcp_fastopen & TCP_FASTOPEN_SERVER)) {
+ return FALSE;
+ }
if ((to->to_flags & TOF_TFOREQ)) {
tp->t_tfo_flags |= TFO_F_OFFER_COOKIE;
tp->t_tfo_stats |= TFO_S_COOKIEREQ_RECV;
tcpstat.tcps_tfo_cookie_req_rcv++;
- return (FALSE);
+ return FALSE;
}
/* Ok, then it must be an offered cookie. We need to check that ... */
tp->t_tfo_stats |= TFO_S_COOKIE_INVALID;
tcpstat.tcps_tfo_cookie_invalid++;
- return (FALSE);
+ return FALSE;
}
if (OSIncrementAtomic(&tcp_tfo_halfcnt) >= tcp_tfo_backlog) {
/* Need to decrement again as we just increased it... */
OSDecrementAtomic(&tcp_tfo_halfcnt);
- return (FALSE);
+ return FALSE;
}
tp->t_tfo_flags |= TFO_F_COOKIE_VALID;
tp->t_tfo_stats |= TFO_S_SYNDATA_RCV;
tcpstat.tcps_tfo_syn_data_rcv++;
- return (TRUE);
+ return TRUE;
}
static void
static void
tcp_tfo_rcv_probe(struct tcpcb *tp, int tlen)
{
- if (tlen != 0)
+ if (tlen != 0) {
return;
+ }
tp->t_tfo_probe_state = TFO_PROBE_PROBING;
tcp_tfo_rcv_data(struct tcpcb *tp)
{
/* Transition from PROBING to NONE as data has been received */
- if (tp->t_tfo_probe_state >= TFO_PROBE_PROBING)
+ if (tp->t_tfo_probe_state >= TFO_PROBE_PROBING) {
tp->t_tfo_probe_state = TFO_PROBE_NONE;
+ }
}
static void
(tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd))))) {
/* keep track of pure window updates */
if (tlen == 0 &&
- tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd)
+ tp->snd_wl2 == th->th_ack && tiwin > tp->snd_wnd) {
tcpstat.tcps_rcvwinupd++;
+ }
tp->snd_wnd = tiwin;
tp->snd_wl1 = th->th_seq;
tp->snd_wl2 = th->th_ack;
- if (tp->snd_wnd > tp->max_sndwnd)
+ if (tp->snd_wnd > tp->max_sndwnd) {
tp->max_sndwnd = tp->snd_wnd;
+ }
- if (tp->t_inpcb->inp_socket->so_flags & SOF_MP_SUBFLOW)
+ if (tp->t_inpcb->inp_socket->so_flags & SOF_MP_SUBFLOW) {
mptcp_update_window_wakeup(tp);
- return (true);
+ }
+ return true;
}
- return (false);
+ return false;
}
void
int dropsocket = 0;
int iss = 0, nosock = 0;
u_int32_t tiwin, sack_bytes_acked = 0;
- struct tcpopt to; /* options in this segment */
+ struct tcpopt to; /* options in this segment */
#if TCPDEBUG
short ostate = 0;
#endif
boolean_t wired = (!wifi && IFNET_IS_WIRED(ifp));
boolean_t recvd_dsack = FALSE;
struct tcp_respond_args tra;
+ bool findpcb_iterated = false;
-#define TCP_INC_VAR(stat, npkts) do { \
- stat += npkts; \
+#define TCP_INC_VAR(stat, npkts) do { \
+ stat += npkts; \
} while (0)
TCP_INC_VAR(tcpstat.tcps_rcvtotal, nlropkts);
}
if (fwd_tag != NULL) {
struct ip_fwd_tag *ipfwd_tag =
- (struct ip_fwd_tag *)(fwd_tag+1);
+ (struct ip_fwd_tag *)(fwd_tag + 1);
next_hop = ipfwd_tag->next_hop;
m_tag_delete(m, fwd_tag);
int isipv6;
#endif /* INET6 */
int rstreason; /* For badport_bandlim accounting purposes */
- struct proc *proc0=current_proc();
+ struct proc *proc0 = current_proc();
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_START,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_START, 0, 0, 0, 0, 0);
#if INET6
isipv6 = (mtod(m, struct ip *)->ip_v == 6) ? 1 : 0;
tlen = sizeof(*ip6) + ntohs(ip6->ip6_plen) - off0;
th = (struct tcphdr *)(void *)((caddr_t)ip6 + off0);
- if (tcp_input_checksum(AF_INET6, m, th, off0, tlen))
+ if (tcp_input_checksum(AF_INET6, m, th, off0, tlen)) {
goto dropnosock;
+ }
KERNEL_DEBUG(DBG_LAYER_BEG, ((th->th_dport << 16) | th->th_sport),
- (((ip6->ip6_src.s6_addr16[0]) << 16) | (ip6->ip6_dst.s6_addr16[0])),
- th->th_seq, th->th_ack, th->th_win);
+ (((ip6->ip6_src.s6_addr16[0]) << 16) | (ip6->ip6_dst.s6_addr16[0])),
+ th->th_seq, th->th_ack, th->th_win);
/*
* Be proactive about unspecified IPv6 address in source.
* As we use all-zero to indicate unbounded/unconnected pcb,
goto dropnosock;
}
DTRACE_TCP5(receive, struct mbuf *, m, struct inpcb *, NULL,
- struct ip6_hdr *, ip6, struct tcpcb *, NULL,
- struct tcphdr *, th);
+ struct ip6_hdr *, ip6, struct tcpcb *, NULL,
+ struct tcphdr *, th);
ip_ecn = (ntohl(ip6->ip6_flow) >> 20) & IPTOS_ECN_MASK;
} else
#endif /* INET6 */
{
- /*
- * Get IP and TCP header together in first mbuf.
- * Note: IP leaves IP header in first mbuf.
- */
- if (off0 > sizeof (struct ip)) {
- ip_stripoptions(m);
- off0 = sizeof(struct ip);
- }
- if (m->m_len < sizeof (struct tcpiphdr)) {
- if ((m = m_pullup(m, sizeof (struct tcpiphdr))) == 0) {
- tcpstat.tcps_rcvshort++;
- return;
+ /*
+ * Get IP and TCP header together in first mbuf.
+ * Note: IP leaves IP header in first mbuf.
+ */
+ if (off0 > sizeof(struct ip)) {
+ ip_stripoptions(m);
+ off0 = sizeof(struct ip);
+ }
+ if (m->m_len < sizeof(struct tcpiphdr)) {
+ if ((m = m_pullup(m, sizeof(struct tcpiphdr))) == 0) {
+ tcpstat.tcps_rcvshort++;
+ return;
+ }
}
- }
- /* Expect 32-bit aligned data pointer on strict-align platforms */
- MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
+ /* Expect 32-bit aligned data pointer on strict-align platforms */
+ MBUF_STRICT_DATA_ALIGNMENT_CHECK_32(m);
- ip = mtod(m, struct ip *);
- th = (struct tcphdr *)(void *)((caddr_t)ip + off0);
- tlen = ip->ip_len;
+ ip = mtod(m, struct ip *);
+ th = (struct tcphdr *)(void *)((caddr_t)ip + off0);
+ tlen = ip->ip_len;
- if (tcp_input_checksum(AF_INET, m, th, off0, tlen))
- goto dropnosock;
+ if (tcp_input_checksum(AF_INET, m, th, off0, tlen)) {
+ goto dropnosock;
+ }
#if INET6
- /* Re-initialization for later version check */
- ip->ip_v = IPVERSION;
+ /* Re-initialization for later version check */
+ ip->ip_v = IPVERSION;
#endif
- ip_ecn = (ip->ip_tos & IPTOS_ECN_MASK);
+ 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);
+ 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);
}
/*
* pull out TCP options and adjust length.
*/
off = th->th_off << 2;
- if (off < sizeof (struct tcphdr) || off > tlen) {
+ if (off < sizeof(struct tcphdr) || off > tlen) {
tcpstat.tcps_rcvbadoff++;
IF_TCP_STATINC(ifp, badformat);
goto dropnosock;
}
- tlen -= off; /* tlen is used instead of ti->ti_len */
- if (off > sizeof (struct tcphdr)) {
+ tlen -= off; /* tlen is used instead of ti->ti_len */
+ if (off > sizeof(struct tcphdr)) {
#if INET6
if (isipv6) {
- IP6_EXTHDR_CHECK(m, off0, off, return);
+ IP6_EXTHDR_CHECK(m, off0, off, return );
ip6 = mtod(m, struct ip6_hdr *);
th = (struct tcphdr *)(void *)((caddr_t)ip6 + off0);
} else
#endif /* INET6 */
{
if (m->m_len < sizeof(struct ip) + off) {
- if ((m = m_pullup(m, sizeof (struct ip) + off)) == 0) {
+ if ((m = m_pullup(m, sizeof(struct ip) + off)) == 0) {
tcpstat.tcps_rcvshort++;
return;
}
th = (struct tcphdr *)(void *)((caddr_t)ip + off0);
}
}
- optlen = off - sizeof (struct tcphdr);
+ optlen = off - sizeof(struct tcphdr);
optp = (u_char *)(th + 1);
/*
* Do quick retrieval of timestamp options ("options
* tcp_dooptions(), etc.
*/
if ((optlen == TCPOLEN_TSTAMP_APPA ||
- (optlen > TCPOLEN_TSTAMP_APPA &&
- optp[TCPOLEN_TSTAMP_APPA] == TCPOPT_EOL)) &&
- *(u_int32_t *)(void *)optp == htonl(TCPOPT_TSTAMP_HDR) &&
- (th->th_flags & TH_SYN) == 0) {
+ (optlen > TCPOLEN_TSTAMP_APPA &&
+ optp[TCPOLEN_TSTAMP_APPA] == TCPOPT_EOL)) &&
+ *(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 *)(void *)(optp + 4));
to.to_tsecr = ntohl(*(u_int32_t *)(void *)(optp + 8));
- optp = NULL; /* we've parsed the options */
+ optp = NULL; /* we've parsed the options */
}
}
thflags = th->th_flags;
*
* 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_TCP_STATINC(ifp, synfin);
goto dropnosock;
}
* absence of a PCB, when scoped routing (and thus source interface
* selection) are enabled.
*/
- if ((m->m_pkthdr.pkt_flags & PKTF_LOOP) || m->m_pkthdr.rcvif == NULL)
+ if ((m->m_pkthdr.pkt_flags & PKTF_LOOP) || m->m_pkthdr.rcvif == NULL) {
ifscope = IFSCOPE_NONE;
- else
+ } else {
ifscope = m->m_pkthdr.rcvif->if_index;
+ }
- /*
- * Convert TCP protocol specific fields to host format.
- */
+ /*
+ * 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);
+ NTOHL(th->th_seq);
+ NTOHL(th->th_ack);
+ NTOHS(th->th_win);
+ NTOHS(th->th_urp);
#endif
/*
* already got one like this?
*/
inp = in_pcblookup_hash(&tcbinfo, ip->ip_src, th->th_sport,
- ip->ip_dst, th->th_dport, 0, m->m_pkthdr.rcvif);
+ ip->ip_dst, th->th_dport, 0, m->m_pkthdr.rcvif);
if (!inp) {
/*
* No, then it's new. Try find the ambushing socket
} else {
inp = in_pcblookup_hash(&tcbinfo,
ip->ip_src, th->th_sport,
- next_hop->sin_addr,
+ next_hop->sin_addr,
ntohs(next_hop->sin_port), 1,
m->m_pkthdr.rcvif);
}
}
} else
-#endif /* IPFIREWALL_FORWARD */
- {
+#endif /* IPFIREWALL_FORWARD */
+ {
#if INET6
- if (isipv6)
- inp = in6_pcblookup_hash(&tcbinfo, &ip6->ip6_src, th->th_sport,
- &ip6->ip6_dst, th->th_dport, 1,
- m->m_pkthdr.rcvif);
- else
+ if (isipv6) {
+ inp = in6_pcblookup_hash(&tcbinfo, &ip6->ip6_src, th->th_sport,
+ &ip6->ip6_dst, th->th_dport, 1,
+ m->m_pkthdr.rcvif);
+ } else
#endif /* INET6 */
- inp = in_pcblookup_hash(&tcbinfo, ip->ip_src, th->th_sport,
- ip->ip_dst, th->th_dport, 1, m->m_pkthdr.rcvif);
- }
+ inp = in_pcblookup_hash(&tcbinfo, ip->ip_src, th->th_sport,
+ ip->ip_dst, th->th_dport, 1, m->m_pkthdr.rcvif);
+ }
/*
* Use the interface scope information from the PCB for outbound
* enabled, tcp_respond will use the scope of the interface where
* the segment arrived on.
*/
- if (inp != NULL && (inp->inp_flags & INP_BOUND_IF))
+ if (inp != NULL && (inp->inp_flags & INP_BOUND_IF)) {
ifscope = inp->inp_boundifp->if_index;
+ }
/*
* If the state is CLOSED (i.e., TCB does not exist) then
}
switch (log_in_vain) {
case 1:
- if(thflags & TH_SYN)
+ if (thflags & TH_SYN) {
log(LOG_INFO,
- "Connection attempt to TCP %s:%d from %s:%d\n",
- dbuf, ntohs(th->th_dport),
- sbuf,
- ntohs(th->th_sport));
+ "Connection attempt to TCP %s:%d from %s:%d\n",
+ dbuf, ntohs(th->th_dport),
+ sbuf,
+ ntohs(th->th_sport));
+ }
break;
case 2:
log(LOG_INFO,
- "Connection attempt to TCP %s:%d from %s:%d flags:0x%x\n",
- dbuf, ntohs(th->th_dport), sbuf,
- ntohs(th->th_sport), thflags);
+ "Connection attempt to TCP %s:%d from %s:%d flags:0x%x\n",
+ dbuf, ntohs(th->th_dport), sbuf,
+ ntohs(th->th_sport), thflags);
break;
case 3:
case 4:
if ((thflags & TH_SYN) && !(thflags & TH_ACK) &&
- !(m->m_flags & (M_BCAST | M_MCAST)) &&
+ !(m->m_flags & (M_BCAST | M_MCAST)) &&
#if INET6
- ((isipv6 && !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &ip6->ip6_src)) ||
- (!isipv6 && ip->ip_dst.s_addr != ip->ip_src.s_addr))
+ ((isipv6 && !IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst, &ip6->ip6_src)) ||
+ (!isipv6 && ip->ip_dst.s_addr != ip->ip_src.s_addr))
#else
- ip->ip_dst.s_addr != ip->ip_src.s_addr
+ ip->ip_dst.s_addr != ip->ip_src.s_addr
#endif
- )
+ ) {
log_in_vain_log((LOG_INFO,
- "Stealth Mode connection attempt to TCP %s:%d from %s:%d\n",
- dbuf, ntohs(th->th_dport),
- sbuf,
- ntohs(th->th_sport)));
+ "Stealth Mode connection attempt to TCP %s:%d from %s:%d\n",
+ dbuf, ntohs(th->th_dport),
+ sbuf,
+ ntohs(th->th_sport)));
+ }
break;
default:
break;
}
}
if (blackhole) {
- if (m->m_pkthdr.rcvif && m->m_pkthdr.rcvif->if_type != IFT_LOOP)
-
+ if (m->m_pkthdr.rcvif && m->m_pkthdr.rcvif->if_type != IFT_LOOP) {
switch (blackhole) {
case 1:
- if (thflags & TH_SYN)
+ if (thflags & TH_SYN) {
goto dropnosock;
+ }
break;
case 2:
goto dropnosock;
default:
goto dropnosock;
}
+ }
}
rstreason = BANDLIM_RST_CLOSEDPORT;
IF_TCP_STATINC(ifp, noconnnolist);
socket_lock(so, 1);
if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING) {
socket_unlock(so, 1);
- inp = NULL; // pretend we didn't find it
+ inp = NULL; // pretend we didn't find it
goto dropnosock;
}
+ if (!isipv6 && inp->inp_faddr.s_addr != INADDR_ANY) {
+ if (inp->inp_faddr.s_addr != ip->ip_src.s_addr ||
+ inp->inp_laddr.s_addr != ip->ip_dst.s_addr ||
+ inp->inp_fport != th->th_sport ||
+ inp->inp_lport != th->th_dport) {
+ os_log_error(OS_LOG_DEFAULT, "%s 5-tuple does not match: %u:%u %u:%u\n",
+ __func__,
+ ntohs(inp->inp_fport), ntohs(th->th_sport),
+ ntohs(inp->inp_lport), ntohs(th->th_dport));
+ if (findpcb_iterated) {
+ goto drop;
+ }
+ findpcb_iterated = true;
+ socket_unlock(so, 1);
+ inp = NULL;
+ goto findpcb;
+ }
+ } else if (isipv6 && !IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_faddr)) {
+ if (!IN6_ARE_ADDR_EQUAL(&inp->in6p_faddr, &ip6->ip6_src) ||
+ !IN6_ARE_ADDR_EQUAL(&inp->in6p_laddr, &ip6->ip6_dst) ||
+ inp->inp_fport != th->th_sport ||
+ inp->inp_lport != th->th_dport) {
+ os_log_error(OS_LOG_DEFAULT, "%s 5-tuple does not match: %u:%u %u:%u\n",
+ __func__,
+ ntohs(inp->inp_fport), ntohs(th->th_sport),
+ ntohs(inp->inp_lport), ntohs(th->th_dport));
+ if (findpcb_iterated) {
+ goto drop;
+ }
+ findpcb_iterated = true;
+ socket_unlock(so, 1);
+ inp = NULL;
+ goto findpcb;
+ }
+ }
+
#if NECP
if (so->so_state & SS_ISCONNECTED) {
// Connected TCP sockets have a fully-bound local and remote,
#if INET6
if (isipv6) {
if (!necp_socket_is_allowed_to_send_recv_v6(inp,
- th->th_dport, th->th_sport, &ip6->ip6_dst,
- &ip6->ip6_src, ifp, NULL, NULL, NULL)) {
+ th->th_dport, th->th_sport, &ip6->ip6_dst,
+ &ip6->ip6_src, ifp, NULL, NULL, NULL)) {
IF_TCP_STATINC(ifp, badformat);
goto drop;
}
#endif
{
if (!necp_socket_is_allowed_to_send_recv_v4(inp,
- th->th_dport, th->th_sport, &ip->ip_dst, &ip->ip_src,
- ifp, NULL, NULL, NULL)) {
+ th->th_dport, th->th_sport, &ip->ip_dst, &ip->ip_src,
+ ifp, NULL, NULL, NULL)) {
IF_TCP_STATINC(ifp, badformat);
goto drop;
}
IF_TCP_STATINC(ifp, noconnlist);
goto dropwithreset;
}
- if (tp->t_state == TCPS_CLOSED)
+ if (tp->t_state == TCPS_CLOSED) {
goto drop;
+ }
/* If none of the FIN|SYN|RST|ACK flag is set, drop */
- if (tcp_do_rfc5961 && (thflags & TH_ACCEPT) == 0)
+ if (tcp_do_rfc5961 && (thflags & TH_ACCEPT) == 0) {
goto drop;
+ }
/* Unscale the window into a 32-bit value. */
- if ((thflags & TH_SYN) == 0)
+ if ((thflags & TH_SYN) == 0) {
tiwin = th->th_win << tp->snd_scale;
- else
+ } else {
tiwin = th->th_win;
+ }
#if CONFIG_MACF_NET
- if (mac_inpcb_check_deliver(inp, m, AF_INET, SOCK_STREAM))
+ if (mac_inpcb_check_deliver(inp, m, AF_INET, SOCK_STREAM)) {
goto drop;
+ }
#endif
/* Avoid processing packets while closing a listen socket */
if (tp->t_state == TCPS_LISTEN &&
- (so->so_options & SO_ACCEPTCONN) == 0)
+ (so->so_options & SO_ACCEPTCONN) == 0) {
goto drop;
+ }
- if (so->so_options & (SO_DEBUG|SO_ACCEPTCONN)) {
+ if (so->so_options & (SO_DEBUG | SO_ACCEPTCONN)) {
#if TCPDEBUG
if (so->so_options & SO_DEBUG) {
ostate = tp->t_state;
#if INET6
- if (isipv6)
+ if (isipv6) {
bcopy((char *)ip6, (char *)tcp_saveipgen,
- sizeof(*ip6));
- else
+ sizeof(*ip6));
+ } else
#endif /* INET6 */
bcopy((char *)ip, (char *)tcp_saveipgen, sizeof(*ip));
tcp_savetcp = *th;
#endif /* INET6 */
struct ifnet *head_ifscope;
unsigned int head_nocell, head_recvanyif,
- head_noexpensive, head_awdl_unrestricted,
- head_intcoproc_allowed;
+ head_noexpensive, head_awdl_unrestricted,
+ head_intcoproc_allowed;
/* Get listener's bound-to-interface, if any */
head_ifscope = (inp->inp_flags & INP_BOUND_IF) ?
* If it does not contain a SYN then it is not interesting; drop it.
* If it is from this socket, drop it, it must be forged.
*/
- if ((thflags & (TH_RST|TH_ACK|TH_SYN)) != TH_SYN) {
+ if ((thflags & (TH_RST | TH_ACK | TH_SYN)) != TH_SYN) {
IF_TCP_STATINC(ifp, listbadsyn);
if (thflags & TH_RST) {
tcpstat.tcps_badsyn++;
goto drop;
}
- KERNEL_DEBUG(DBG_FNC_TCP_NEWCONN | DBG_FUNC_START,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_NEWCONN | DBG_FUNC_START, 0, 0, 0, 0, 0);
if (th->th_dport == th->th_sport) {
#if INET6
if (isipv6) {
if (IN6_ARE_ADDR_EQUAL(&ip6->ip6_dst,
- &ip6->ip6_src))
+ &ip6->ip6_src)) {
goto drop;
+ }
} else
#endif /* INET6 */
- if (ip->ip_dst.s_addr == ip->ip_src.s_addr)
- goto drop;
+ if (ip->ip_dst.s_addr == ip->ip_src.s_addr) {
+ goto drop;
+ }
}
/*
* RFC1122 4.2.3.10, p. 104: discard bcast/mcast SYN
* Packets with a multicast source address should also
* be discarded.
*/
- if (m->m_flags & (M_BCAST|M_MCAST))
+ if (m->m_flags & (M_BCAST | M_MCAST)) {
goto drop;
+ }
#if INET6
if (isipv6) {
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
- IN6_IS_ADDR_MULTICAST(&ip6->ip6_src))
+ IN6_IS_ADDR_MULTICAST(&ip6->ip6_src)) {
goto drop;
+ }
} else
#endif
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
- IN_MULTICAST(ntohl(ip->ip_src.s_addr)) ||
- ip->ip_src.s_addr == htonl(INADDR_BROADCAST) ||
- in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif))
+ IN_MULTICAST(ntohl(ip->ip_src.s_addr)) ||
+ ip->ip_src.s_addr == htonl(INADDR_BROADCAST) ||
+ in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
goto drop;
+ }
#if INET6
if (so->so_filt) {
#if INET6
if (isipv6) {
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)&from;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6*)&from;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_family = AF_INET6;
sin6->sin6_flowinfo = 0;
sin6->sin6_addr = ip6->ip6_src;
sin6->sin6_scope_id = 0;
- }
- else
+ } else
#endif
{
struct sockaddr_in *sin = (struct sockaddr_in*)&from;
if (so2 == 0) {
tcpstat.tcps_listendrop++;
if (tcp_dropdropablreq(so)) {
- if (so->so_filt)
+ if (so->so_filt) {
so2 = sonewconn(so, 0, (struct sockaddr*)&from);
- else
+ } else {
so2 = sonewconn(so, 0, NULL);
+ }
}
- if (!so2)
+ if (!so2) {
goto drop;
+ }
}
/* Point "inp" and "tp" in tandem to new socket */
/*
* Inherit restrictions from listener.
*/
- if (head_nocell)
+ if (head_nocell) {
inp_set_nocellular(inp);
- if (head_noexpensive)
+ }
+ if (head_noexpensive) {
inp_set_noexpensive(inp);
- if (head_awdl_unrestricted)
+ }
+ if (head_awdl_unrestricted) {
inp_set_awdl_unrestricted(inp);
- if (head_intcoproc_allowed)
+ }
+ if (head_intcoproc_allowed) {
inp_set_intcoproc_allowed(inp);
+ }
/*
* Inherit {IN,IN6}_RECV_ANYIF from listener.
*/
- if (head_recvanyif)
+ if (head_recvanyif) {
inp->inp_flags |= INP_RECV_ANYIF;
- else
+ } else {
inp->inp_flags &= ~INP_RECV_ANYIF;
+ }
#if INET6
- if (isipv6)
+ if (isipv6) {
inp->in6p_laddr = ip6->ip6_dst;
- else {
+ } else {
inp->inp_vflag &= ~INP_IPV6;
inp->inp_vflag |= INP_IPV4;
#endif /* INET6 */
- inp->inp_laddr = ip->ip_dst;
+ inp->inp_laddr = ip->ip_dst;
#if INET6
- }
+ }
#endif /* INET6 */
inp->inp_lport = th->th_dport;
if (in_pcbinshash(inp, 0) != 0) {
* put the PCB on the hash lists.
*/
#if INET6
- if (isipv6)
+ if (isipv6) {
inp->in6p_laddr = in6addr_any;
- else
+ } else
#endif /* INET6 */
- inp->inp_laddr.s_addr = INADDR_ANY;
+ inp->inp_laddr.s_addr = INADDR_ANY;
inp->inp_lport = 0;
- socket_lock(oso, 0); /* release ref on parent */
+ socket_lock(oso, 0); /* release ref on parent */
socket_unlock(oso, 1);
goto drop;
}
* calling the accept system call.
*/
inp->inp_flags |=
- oinp->inp_flags & INP_CONTROLOPTS;
- if (oinp->in6p_outputopts)
+ oinp->inp_flags & INP_CONTROLOPTS;
+ if (oinp->in6p_outputopts) {
inp->in6p_outputopts =
- ip6_copypktopts(oinp->in6p_outputopts,
- M_NOWAIT);
+ ip6_copypktopts(oinp->in6p_outputopts,
+ M_NOWAIT);
+ }
} else
#endif /* INET6 */
{
socket_lock(oso, 0);
#if IPSEC
/* copy old policy into new socket's */
- if (sotoinpcb(oso)->inp_sp)
- {
+ if (sotoinpcb(oso)->inp_sp) {
int error = 0;
/* Is it a security hole here to silently fail to copy the policy? */
- if (inp->inp_sp != NULL)
+ if (inp->inp_sp != NULL) {
error = ipsec_init_policy(so, &inp->inp_sp);
- if (error != 0 || ipsec_copy_policy(sotoinpcb(oso)->inp_sp, inp->inp_sp))
+ }
+ if (error != 0 || ipsec_copy_policy(sotoinpcb(oso)->inp_sp, inp->inp_sp)) {
printf("tcp_input: could not copy policy\n");
+ }
}
#endif
/* inherit states from the listener */
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
- struct tcpcb *, tp, int32_t, TCPS_LISTEN);
+ struct tcpcb *, tp, int32_t, TCPS_LISTEN);
tp->t_state = TCPS_LISTEN;
- tp->t_flags |= tp0->t_flags & (TF_NOPUSH|TF_NOOPT|TF_NODELAY);
- tp->t_flagsext |= (tp0->t_flagsext & (TF_RXTFINDROP|TF_NOTIMEWAIT|TF_FASTOPEN));
+ tp->t_flags |= tp0->t_flags & (TF_NOPUSH | TF_NOOPT | TF_NODELAY);
+ tp->t_flagsext |= (tp0->t_flagsext & (TF_RXTFINDROP | TF_NOTIMEWAIT | TF_FASTOPEN));
tp->t_keepinit = tp0->t_keepinit;
tp->t_keepcnt = tp0->t_keepcnt;
tp->t_keepintvl = tp0->t_keepintvl;
tp->t_adaptive_wtimo = tp0->t_adaptive_wtimo;
tp->t_adaptive_rtimo = tp0->t_adaptive_rtimo;
tp->t_inpcb->inp_ip_ttl = tp0->t_inpcb->inp_ip_ttl;
- if ((so->so_flags & SOF_NOTSENT_LOWAT) != 0)
+ if ((so->so_flags & SOF_NOTSENT_LOWAT) != 0) {
tp->t_notsent_lowat = tp0->t_notsent_lowat;
+ }
tp->t_inpcb->inp_flags2 |=
tp0->t_inpcb->inp_flags2 & INP2_KEEPALIVE_OFFLOAD;
tcp_set_max_rwinscale(tp, so, ifp);
- KERNEL_DEBUG(DBG_FNC_TCP_NEWCONN | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_NEWCONN | DBG_FUNC_END, 0, 0, 0, 0, 0);
}
}
socket_lock_assert_owned(so);
/*
* Keep track of how many bytes were received in the LRO packet
*/
- if ((pktf_sw_lro_pkt) && (nlropkts > 2)) {
+ if ((pktf_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.
- * + Socket is in established state
- * + We negotiated ECN in the TCP setup
- * + This isn't a pure ack (tlen > 0)
- * + The data is in the valid window
+ * + The IP Congestion experienced flag was set.
+ * + Socket is in established state
+ * + We negotiated ECN in the TCP setup
+ * + This isn't a pure ack (tlen > 0)
+ * + The data is in the valid window
*
- * TE_SENDECE will be cleared when we receive a packet with TH_CWR 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 &&
TCP_ECN_ENABLED(tp) && tlen > 0 &&
tcpstat.tcps_ecn_fallback_ce++;
tcp_heuristic_ecn_aggressive(tp);
tp->ecn_flags |= TE_CEHEURI_SET;
- INP_INC_IFNET_STAT(inp,ecn_fallback_ce);
+ INP_INC_IFNET_STAT(inp, ecn_fallback_ce);
} else {
/* We tracked the first ECN_MIN_CE_PROBES segments, we
* now know that the path is good.
* 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)))) {
+ if (sw_lro && (tp->t_flagsext & TF_LRO_OFFLOADED) &&
+ ((tcp_now - tp->t_rcvtime) >= (TCP_IDLETIMEOUT(tp)))) {
turnoff_lro = 1;
- }
+ }
/* Update rcvtime as a new segment was received on the connection */
tp->t_rcvtime = tcp_now;
if (TCPS_HAVEESTABLISHED(tp->t_state)) {
tcp_keepalive_reset(tp);
- if (tp->t_mpsub)
+ if (tp->t_mpsub) {
mptcp_reset_keepalive(tp);
+ }
}
/*
tcp_check_timer_state(tp);
socket_unlock(so, 1);
KERNEL_DEBUG(DBG_FNC_TCP_INPUT |
- DBG_FUNC_END,0,0,0,0,0);
+ DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
}
#endif /* MPTCP */
if (tp->t_state == TCPS_SYN_SENT && (thflags & TH_SYN)) {
if (!(thflags & TH_ACK) ||
(SEQ_GT(th->th_ack, tp->iss) &&
- SEQ_LEQ(th->th_ack, tp->snd_max)))
+ SEQ_LEQ(th->th_ack, tp->snd_max))) {
tcp_finalize_options(tp, &to, ifscope);
+ }
}
#if TRAFFIC_MGT
* to queuing in edge/access routers.
*/
if (tp->t_state == TCPS_ESTABLISHED &&
- (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK|TH_ECE|TH_PUSH)) == TH_ACK &&
- ((tp->t_flags & (TF_NEEDSYN|TF_NEEDFIN)) == 0) &&
+ (thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK | TH_ECE | TH_PUSH)) == TH_ACK &&
+ ((tp->t_flags & (TF_NEEDSYN | TF_NEEDFIN)) == 0) &&
((to.to_flags & TOF_TS) == 0 ||
- TSTMP_GEQ(to.to_tsval, tp->ts_recent)) &&
+ 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) {
if (m->m_pkthdr.pkt_flags & PKTF_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)) {
+ 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
* Compute inter-arrival jitter taking
* this packet as the second packet
*/
- if (pktf_sw_lro_pkt)
+ if (pktf_sw_lro_pkt) {
compute_iaj(tp, nlropkts,
m->m_pkthdr.lro_elapsed);
- else
+ } else {
compute_iaj(tp, 1, 0);
+ }
}
- if (seg_size < tp->iaj_size) {
+ if (seg_size < tp->iaj_size) {
/*
* There is a smaller packet in the stream.
* Some times the maximum size supported
* be TH_NEEDSYN.
*/
if (tp->t_state == TCPS_ESTABLISHED &&
- (thflags & (TH_SYN|TH_FIN|TH_RST|TH_URG|TH_ACK|TH_ECE|TH_CWR)) == TH_ACK &&
- ((tp->t_flags & (TF_NEEDSYN|TF_NEEDFIN)) == 0) &&
+ (thflags & (TH_SYN | TH_FIN | TH_RST | TH_URG | TH_ACK | TH_ECE | TH_CWR)) == TH_ACK &&
+ ((tp->t_flags & (TF_NEEDSYN | TF_NEEDFIN)) == 0) &&
((to.to_flags & TOF_TS) == 0 ||
- TSTMP_GEQ(to.to_tsval, tp->ts_recent)) &&
+ TSTMP_GEQ(to.to_tsval, tp->ts_recent)) &&
th->th_seq == tp->rcv_nxt &&
tiwin && tiwin == tp->snd_wnd &&
tp->snd_nxt == tp->snd_max) {
-
/*
* If last ACK falls within this segment's sequence numbers,
* record the timestamp.
* proposal of the tcplw@cray.com list (Braden 1993/04/26).
*/
if ((to.to_flags & TOF_TS) != 0 &&
- SEQ_LEQ(th->th_seq, tp->last_ack_sent)) {
+ SEQ_LEQ(th->th_seq, tp->last_ack_sent)) {
tp->ts_recent_age = tcp_now;
tp->ts_recent = to.to_tsval;
}
* calculations in this function
* assume that snd_una is not updated yet.
*/
- if (CC_ALGO(tp)->congestion_avd != NULL)
+ if (CC_ALGO(tp)->congestion_avd != NULL) {
CC_ALGO(tp)->congestion_avd(tp, th);
+ }
tcp_ccdbg_trace(tp, th, TCP_CC_INSEQ_ACK_RCVD);
sbdrop(&so->so_snd, acked);
if (so->so_flags & SOF_ENABLE_MSGS) {
tcp_sbsnd_trim(&so->so_snd);
if (SEQ_GT(tp->snd_una, tp->snd_recover) &&
- SEQ_LEQ(th->th_ack, tp->snd_recover))
+ SEQ_LEQ(th->th_ack, tp->snd_recover)) {
tp->snd_recover = th->th_ack - 1;
+ }
tp->snd_una = th->th_ack;
TCP_RESET_REXMT_STATE(tp);
}
if (!SLIST_EMPTY(&tp->t_rxt_segments) &&
!TCP_DSACK_SEQ_IN_WINDOW(tp,
- tp->t_dsack_lastuna, tp->snd_una))
+ tp->t_dsack_lastuna, tp->snd_una)) {
tcp_rxtseg_clean(tp);
+ }
if ((tp->t_flagsext & TF_MEASURESNDBW) != 0 &&
- tp->t_bwmeas != NULL)
+ tp->t_bwmeas != NULL) {
tcp_bwmeas_check(tp);
+ }
sowwakeup(so); /* has to be done with socket lock held */
- if (!SLIST_EMPTY(&tp->t_notify_ack))
+ if (!SLIST_EMPTY(&tp->t_notify_ack)) {
tcp_notify_acknowledgement(tp, so);
+ }
if ((so->so_snd.sb_cc) || (tp->t_flags & TF_ACKNOW)) {
(void) tcp_output(tp);
tcp_check_timer_state(tp);
socket_unlock(so, 1);
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
}
} else if (th->th_ack == tp->snd_una &&
*/
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_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 && !pktf_sw_lro_pkt && !isipv6 &&
(so->so_flags & SOF_USELRO) &&
!IFNET_IS_CELLULAR(m->m_pkthdr.rcvif) &&
- (m->m_pkthdr.rcvif->if_type != IFT_LOOP) &&
+ (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_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 (SACK_ENABLED(tp) && tp->rcv_numsacks)
+ if (SACK_ENABLED(tp) && tp->rcv_numsacks) {
tcp_clean_sackreport(tp);
+ }
++tcpstat.tcps_preddat;
tp->rcv_nxt += tlen;
/*
INP_ADD_STAT(inp, cell, wifi, wired,
rxpackets, 1);
}
- INP_ADD_STAT(inp, cell, wifi, wired,rxbytes,
+ INP_ADD_STAT(inp, cell, wifi, wired, rxbytes,
tlen);
inp_set_activity_bitmap(inp);
}
* connection is in streaming mode and the last
* packet was not an end-of-write
*/
- if (tp->t_flags & TF_STREAMING_ON)
+ if (tp->t_flags & TF_STREAMING_ON) {
tcp_compute_rtt(tp, &to, th);
+ }
tcp_sbrcv_grow(tp, &so->so_rcv, &to, tlen,
TCP_AUTORCVBUF_MAX(ifp));
* Add data to socket buffer.
*/
so_recv_data_stat(so, m, 0);
- m_adj(m, drop_hdrlen); /* delayed header drop */
+ m_adj(m, drop_hdrlen); /* delayed header drop */
/*
* If message delivery (SOF_ENABLE_MSGS) is enabled on
#if INET6
if (isipv6) {
KERNEL_DEBUG(DBG_LAYER_END, ((th->th_dport << 16) | th->th_sport),
- (((ip6->ip6_src.s6_addr16[0]) << 16) | (ip6->ip6_dst.s6_addr16[0])),
- th->th_seq, th->th_ack, th->th_win);
- }
- else
+ (((ip6->ip6_src.s6_addr16[0]) << 16) | (ip6->ip6_dst.s6_addr16[0])),
+ th->th_seq, th->th_ack, th->th_win);
+ } else
#endif
{
KERNEL_DEBUG(DBG_LAYER_END, ((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);
+ (((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 (DELAY_ACK(tp, th)) {
if ((tp->t_flags & TF_DELACK) == 0) {
- tp->t_flags |= TF_DELACK;
+ tp->t_flags |= TF_DELACK;
tp->t_timer[TCPT_DELACK] = OFFSET_FROM_START(tp, tcp_delack);
}
} else {
tcp_adaptive_rwtimo_check(tp, tlen);
- if (tlen > 0)
+ if (tlen > 0) {
tcp_tfo_rcv_data(tp);
+ }
tcp_check_timer_state(tp);
socket_unlock(so, 1);
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
}
}
*/
socket_lock_assert_owned(so);
win = tcp_sbspace(tp);
- if (win < 0)
+ if (win < 0) {
win = 0;
- else { /* clip rcv window to 4K for modems */
- if (tp->t_flags & TF_SLOWLINK && slowlink_wsize > 0)
+ } else { /* clip rcv window to 4K for modems */
+ if (tp->t_flags & TF_SLOWLINK && slowlink_wsize > 0) {
win = min(win, slowlink_wsize);
+ }
}
tp->rcv_wnd = imax(win, (int)(tp->rcv_adv - tp->rcv_nxt));
#if MPTCP
#endif /* MPTCP */
switch (tp->t_state) {
-
/*
* Initialize tp->rcv_nxt, and tp->irs, select an initial
* tp->iss, and send a segment:
#if INET6
if (isipv6) {
MALLOC(sin6, struct sockaddr_in6 *, sizeof *sin6,
- M_SONAME, M_NOWAIT);
- if (sin6 == NULL)
+ M_SONAME, M_NOWAIT);
+ if (sin6 == NULL) {
goto drop;
+ }
bzero(sin6, sizeof(*sin6));
sin6->sin6_family = AF_INET6;
sin6->sin6_len = sizeof(*sin6);
sin6->sin6_addr = ip6->ip6_src;
sin6->sin6_port = th->th_sport;
laddr6 = inp->in6p_laddr;
- if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
+ if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
inp->in6p_laddr = ip6->ip6_dst;
+ }
if (in6_pcbconnect(inp, (struct sockaddr *)sin6,
- proc0)) {
+ proc0)) {
inp->in6p_laddr = laddr6;
FREE(sin6, M_SONAME);
goto drop;
FREE(sin6, M_SONAME);
} else
#endif
- {
+ {
socket_lock_assert_owned(so);
MALLOC(sin, struct sockaddr_in *, sizeof *sin, M_SONAME,
M_NOWAIT);
- if (sin == NULL)
+ if (sin == NULL) {
goto drop;
+ }
sin->sin_family = AF_INET;
sin->sin_len = sizeof(*sin);
sin->sin_addr = ip->ip_src;
sin->sin_port = th->th_sport;
bzero((caddr_t)sin->sin_zero, sizeof(sin->sin_zero));
laddr = inp->inp_laddr;
- if (inp->inp_laddr.s_addr == INADDR_ANY)
+ if (inp->inp_laddr.s_addr == INADDR_ANY) {
inp->inp_laddr = ip->ip_dst;
+ }
if (in_pcbconnect(inp, (struct sockaddr *)sin, proc0,
IFSCOPE_NONE, NULL)) {
inp->inp_laddr = laddr;
tcp_dooptions(tp, optp, optlen, th, &to);
tcp_finalize_options(tp, &to, ifscope);
- if (tfo_enabled(tp) && tcp_tfo_syn(tp, &to))
+ if (tfo_enabled(tp) && tcp_tfo_syn(tp, &to)) {
isconnected = TRUE;
+ }
- if (iss)
+ if (iss) {
tp->iss = iss;
- else {
+ } else {
tp->iss = tcp_new_isn(tp);
- }
+ }
tp->irs = th->th_seq;
tcp_sendseqinit(tp);
tcp_rcvseqinit(tp);
* set SND.WND = SEG.WND,
* initialize CCsend and CCrecv.
*/
- tp->snd_wnd = tiwin; /* initial send-window */
+ tp->snd_wnd = tiwin; /* initial send-window */
tp->max_sndwnd = tp->snd_wnd;
tp->t_flags |= TF_ACKNOW;
tp->t_unacksegs = 0;
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
- struct tcpcb *, tp, int32_t, TCPS_SYN_RECEIVED);
+ struct tcpcb *, tp, int32_t, TCPS_SYN_RECEIVED);
tp->t_state = TCPS_SYN_RECEIVED;
tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
- TCP_CONN_KEEPINIT(tp));
- dropsocket = 0; /* committed to socket */
+ TCP_CONN_KEEPINIT(tp));
+ dropsocket = 0; /* committed to socket */
- if (inp->inp_flowhash == 0)
+ if (inp->inp_flowhash == 0) {
inp->inp_flowhash = inp_calc_flowhash(inp);
+ }
#if INET6
/* update flowinfo - RFC 6437 */
if (inp->inp_flow == 0 &&
}
goto trimthenstep6;
- }
+ }
/*
* If the state is SYN_RECEIVED and the seg contains an ACK,
case TCPS_SYN_RECEIVED:
if ((thflags & TH_ACK) &&
(SEQ_LEQ(th->th_ack, tp->snd_una) ||
- SEQ_GT(th->th_ack, tp->snd_max))) {
- rstreason = BANDLIM_RST_OPENPORT;
- IF_TCP_STATINC(ifp, ooopacket);
- goto dropwithreset;
+ SEQ_GT(th->th_ack, tp->snd_max))) {
+ rstreason = BANDLIM_RST_OPENPORT;
+ IF_TCP_STATINC(ifp, ooopacket);
+ goto dropwithreset;
}
/*
*/
if ((thflags & TH_SYN) &&
(tp->irs == th->th_seq) &&
- !(to.to_flags & TOF_SCALE))
+ !(to.to_flags & TOF_SCALE)) {
tp->t_flags &= ~TF_RCVD_SCALE;
+ }
break;
/*
case TCPS_SYN_SENT:
if ((thflags & TH_ACK) &&
(SEQ_LEQ(th->th_ack, tp->iss) ||
- SEQ_GT(th->th_ack, tp->snd_max))) {
+ SEQ_GT(th->th_ack, tp->snd_max))) {
rstreason = BANDLIM_UNLIMITED;
IF_TCP_STATINC(ifp, ooopacket);
goto dropwithreset;
}
if (thflags & TH_RST) {
if ((thflags & TH_ACK) != 0) {
- if (tfo_enabled(tp))
+ if (tfo_enabled(tp)) {
tcp_heuristic_tfo_rst(tp);
+ }
if ((tp->ecn_flags & (TE_SETUPSENT | TE_RCVD_SYN_RST)) == TE_SETUPSENT) {
/*
* On local connections, send
}
goto drop;
}
- if ((thflags & TH_SYN) == 0)
+ if ((thflags & TH_SYN) == 0) {
goto drop;
- tp->snd_wnd = th->th_win; /* initial send window */
+ }
+ tp->snd_wnd = th->th_win; /* initial send window */
tp->max_sndwnd = tp->snd_wnd;
tp->irs = th->th_seq;
tcpstat.tcps_ecn_not_supported++;
}
if (tp->ecn_flags & TE_SETUPSENT &&
- tp->t_rxtshift > 0)
+ tp->t_rxtshift > 0) {
tcp_heuristic_ecn_loss(tp);
+ }
/* non-ECN-setup SYN-ACK */
tp->ecn_flags &= ~TE_SENDIPECT;
}
tp->rcv_adv += min(tp->rcv_wnd, TCP_MAXWIN << tp->rcv_scale);
- tp->snd_una++; /* SYN is acked */
- if (SEQ_LT(tp->snd_nxt, tp->snd_una))
+ tp->snd_una++; /* SYN is acked */
+ if (SEQ_LT(tp->snd_nxt, tp->snd_una)) {
tp->snd_nxt = tp->snd_una;
+ }
/*
* We have sent more in the SYN than what is being
* ACKNOW will be turned on later.
*/
TCP_INC_VAR(tp->t_unacksegs, nlropkts);
- if (DELAY_ACK(tp, th) && tlen != 0 ) {
+ 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);
}
- }
- else {
+ } else {
tp->t_flags |= TF_ACKNOW;
}
/*
tp->t_timer[TCPT_KEEP] =
OFFSET_FROM_START(tp,
TCP_CONN_KEEPIDLE(tp));
- if (nstat_collect)
+ if (nstat_collect) {
nstat_route_connect_success(
- inp->inp_route.ro_rt);
+ inp->inp_route.ro_rt);
+ }
/*
* The SYN is acknowledged but una is not
* updated yet. So pass the value of
isconnected = FALSE;
} else
#endif /* MPTCP */
- isconnected = TRUE;
+ isconnected = TRUE;
if ((tp->t_tfo_flags & (TFO_F_COOKIE_REQ | TFO_F_COOKIE_SENT)) ||
(tp->t_tfo_stats & TFO_S_SYN_DATA_SENT)) {
tp->t_tfo_stats |= TFO_S_SYN_DATA_ACKED;
tcpstat.tcps_tfo_syn_data_acked++;
#if MPTCP
- if (so->so_flags & SOF_MP_SUBFLOW)
+ if (so->so_flags & SOF_MP_SUBFLOW) {
so->so_flags1 |= SOF1_TFO_REWIND;
+ }
#endif
tcp_tfo_rcv_probe(tp, tlen);
}
tp->t_flags |= TF_ACKNOW;
tp->t_timer[TCPT_REXMT] = 0;
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
- struct tcpcb *, tp, int32_t, TCPS_SYN_RECEIVED);
+ struct tcpcb *, tp, int32_t, TCPS_SYN_RECEIVED);
tp->t_state = TCPS_SYN_RECEIVED;
/*
* processing in the middle of step 5, ack processing.
* Otherwise, goto step 6.
*/
- if (thflags & TH_ACK)
+ if (thflags & TH_ACK) {
goto process_ACK;
+ }
goto step6;
/*
* If the state is LAST_ACK or CLOSING or TIME_WAIT:
case TCPS_LAST_ACK:
case TCPS_CLOSING:
case TCPS_TIME_WAIT:
- break; /* continue normal processing */
+ break; /* continue normal processing */
/* Received a SYN while connection is already established.
* This is a "half open connection and other anomalies" described
* there is already a RST in flight from the peer.
* In that case, accept the RST for non-established
* state if it's one off from last_ack_sent.
-
+ *
*/
if (thflags & TH_RST) {
if ((SEQ_GEQ(th->th_seq, tp->last_ack_sent) &&
SEQ_LT(th->th_seq, tp->last_ack_sent + tp->rcv_wnd)) ||
(tp->rcv_wnd == 0 &&
((tp->last_ack_sent == th->th_seq) ||
- ((tp->last_ack_sent -1) == th->th_seq)))) {
+ ((tp->last_ack_sent - 1) == th->th_seq)))) {
if (tcp_do_rfc5961 == 0 || tp->last_ack_sent == th->th_seq) {
switch (tp->t_state) {
-
case TCPS_SYN_RECEIVED:
IF_TCP_STATINC(ifp, rstinsynrcv);
so->so_error = ECONNREFUSED;
}
case TCPS_FIN_WAIT_1:
case TCPS_CLOSE_WAIT:
- /*
- Drop through ...
- */
+ /*
+ * Drop through ...
+ */
case TCPS_FIN_WAIT_2:
so->so_error = ECONNRESET;
- close:
+close:
postevent(so, 0, EV_RESET);
soevent(so,
(SO_FILT_HINT_LOCKED |
*/
if ((to.to_flags & TOF_TS) != 0 && tp->ts_recent &&
TSTMP_LT(to.to_tsval, tp->ts_recent)) {
-
/* Check to see if ts_recent is over 24 days old. */
if ((int)(tcp_now - tp->ts_recent_age) > TCP_PAWS_IDLE) {
/*
if (nstat_collect) {
nstat_route_rx(tp->t_inpcb->inp_route.ro_rt,
- 1, tlen, NSTAT_RX_FLAG_DUPLICATE);
+ 1, tlen, NSTAT_RX_FLAG_DUPLICATE);
INP_ADD_STAT(inp, cell, wifi, wired,
rxpackets, 1);
INP_ADD_STAT(inp, cell, wifi, wired,
tp->t_stat.rxduplicatebytes += tlen;
inp_set_activity_bitmap(inp);
}
- if (tlen > 0)
+ if (tlen > 0) {
goto dropafterack;
+ }
goto drop;
}
}
is_syn_set = TRUE;
thflags &= ~TH_SYN;
th->th_seq++;
- if (th->th_urp > 1)
+ if (th->th_urp > 1) {
th->th_urp--;
- else
+ } else {
thflags &= ~TH_URG;
+ }
todrop--;
}
/*
if (todrop == 1) {
/* This could be a keepalive */
soevent(so, SO_FILT_HINT_LOCKED |
- SO_FILT_HINT_KEEPALIVE);
+ SO_FILT_HINT_KEEPALIVE);
}
todrop = tlen;
tcpstat.tcps_rcvduppack++;
}
if (nstat_collect) {
nstat_route_rx(tp->t_inpcb->inp_route.ro_rt, 1,
- todrop, NSTAT_RX_FLAG_DUPLICATE);
+ todrop, NSTAT_RX_FLAG_DUPLICATE);
INP_ADD_STAT(inp, cell, wifi, wired, rxpackets, 1);
INP_ADD_STAT(inp, cell, wifi, wired, rxbytes, todrop);
tp->t_stat.rxduplicatebytes += todrop;
inp_set_activity_bitmap(inp);
}
- drop_hdrlen += todrop; /* drop from the top afterwards */
+ drop_hdrlen += todrop; /* drop from the top afterwards */
th->th_seq += todrop;
tlen -= todrop;
- if (th->th_urp > todrop)
+ if (th->th_urp > todrop) {
th->th_urp -= todrop;
- else {
+ } else {
thflags &= ~TH_URG;
th->th_urp = 0;
}
boolean_t close_it = FALSE;
if (!(so->so_flags & SOF_MP_SUBFLOW) && (so->so_state & SS_NOFDREF) &&
- tp->t_state > TCPS_CLOSE_WAIT)
+ tp->t_state > TCPS_CLOSE_WAIT) {
close_it = TRUE;
+ }
if ((so->so_flags & SOF_MP_SUBFLOW) && (mptetoso(tptomptp(tp)->mpt_mpte)->so_state & SS_NOFDREF) &&
- tp->t_state > TCPS_CLOSE_WAIT)
+ tp->t_state > TCPS_CLOSE_WAIT) {
close_it = TRUE;
+ }
- if ((so->so_flags & SOF_DEFUNCT) && tp->t_state > TCPS_FIN_WAIT_1)
+ if ((so->so_flags & SOF_DEFUNCT) && tp->t_state > TCPS_FIN_WAIT_1) {
close_it = TRUE;
+ }
if (close_it) {
tp = tcp_close(tp);
* If segment ends after window, drop trailing data
* (and PUSH and FIN); if nothing left, just ACK.
*/
- todrop = (th->th_seq+tlen) - (tp->rcv_nxt+tp->rcv_wnd);
+ todrop = (th->th_seq + tlen) - (tp->rcv_nxt + tp->rcv_wnd);
if (todrop > 0) {
tcpstat.tcps_rcvpackafterwin++;
if (todrop >= tlen) {
if (tp->rcv_wnd == 0 && th->th_seq == tp->rcv_nxt) {
tp->t_flags |= TF_ACKNOW;
tcpstat.tcps_rcvwinprobe++;
- } else
+ } else {
goto dropafterack;
- } else
+ }
+ } else {
tcpstat.tcps_rcvbyteafterwin += todrop;
+ }
m_adj(m, -todrop);
tlen -= todrop;
- thflags &= ~(TH_PUSH|TH_FIN);
+ thflags &= ~(TH_PUSH | TH_FIN);
}
/*
if ((to.to_flags & TOF_TS) != 0 &&
SEQ_LEQ(th->th_seq, tp->last_ack_sent) &&
SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen +
- ((thflags & (TH_SYN|TH_FIN)) != 0))) {
+ ((thflags & (TH_SYN | TH_FIN)) != 0))) {
tp->ts_recent_age = tcp_now;
tp->ts_recent = to.to_tsval;
}
* We need to make absolutely sure that we are
* going to reply upon a duplicate SYN-segment.
*/
- if (th->th_flags & TH_SYN)
+ if (th->th_flags & TH_SYN) {
needoutput = 1;
+ }
}
goto step6;
- } else if (tp->t_flags & TF_ACKNOW)
+ } else if (tp->t_flags & TF_ACKNOW) {
goto dropafterack;
- else
+ } else {
goto drop;
+ }
}
/*
*/
switch (tp->t_state) {
-
/*
* In SYN_RECEIVED state, the ack ACKs our SYN, so enter
* ESTABLISHED state and continue processing.
struct tcpcb *, tp, int32_t, TCPS_ESTABLISHED);
tp->t_state = TCPS_ESTABLISHED;
tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
- TCP_CONN_KEEPIDLE(tp));
- if (nstat_collect)
+ TCP_CONN_KEEPIDLE(tp));
+ if (nstat_collect) {
nstat_route_connect_success(
- tp->t_inpcb->inp_route.ro_rt);
+ tp->t_inpcb->inp_route.ro_rt);
+ }
/*
* The SYN is acknowledged but una is not updated
* yet. So pass the value of ack to compute
* If segment contains data or ACK, will call tcp_reass()
* later; if not, do so now to pass queued data to user.
*/
- if (tlen == 0 && (thflags & TH_FIN) == 0)
+ if (tlen == 0 && (thflags & TH_FIN) == 0) {
(void) tcp_reass(tp, (struct tcphdr *)0, &tlen,
NULL, ifp);
+ }
tp->snd_wl1 = th->th_seq - 1;
#if MPTCP
isconnected = FALSE;
} else
#endif /* MPTCP */
- isconnected = TRUE;
+ isconnected = TRUE;
if ((tp->t_tfo_flags & TFO_F_COOKIE_VALID)) {
/* Done this when receiving the SYN */
isconnected = FALSE;
* handled by the label "dodata" right after step6.
*/
if (so->so_snd.sb_cc) {
- tp->snd_una++; /* SYN is acked */
- if (SEQ_LT(tp->snd_nxt, tp->snd_una))
+ tp->snd_una++; /* SYN is acked */
+ if (SEQ_LT(tp->snd_nxt, tp->snd_una)) {
tp->snd_nxt = tp->snd_una;
+ }
/*
* No duplicate-ACK handling is needed. So, we
*/
if (SACK_ENABLED(tp) &&
(to.to_nsacks > 0 ||
- !TAILQ_EMPTY(&tp->snd_holes)))
+ !TAILQ_EMPTY(&tp->snd_holes))) {
tcp_sack_doack(tp, &to, th,
&sack_bytes_acked);
+ }
goto process_ACK;
}
- /* FALLTHROUGH */
+ /* FALLTHROUGH */
/*
* In ESTABLISHED state: drop duplicate ACKs; ACK out of range
}
if (SACK_ENABLED(tp) &&
- (to.to_nsacks > 0 || !TAILQ_EMPTY(&tp->snd_holes)))
+ (to.to_nsacks > 0 || !TAILQ_EMPTY(&tp->snd_holes))) {
tcp_sack_doack(tp, &to, th, &sack_bytes_acked);
+ }
#if MPTCP
if (tp->t_mpuna && SEQ_GEQ(th->th_ack, tp->t_mpuna)) {
tp->t_mpflags |=
TMPF_MPTCP_TRUE;
mptcplog((LOG_DEBUG, "MPTCP "
- "Sockets: %s \n",__func__),
+ "Sockets: %s \n", __func__),
MPTCP_SOCKET_DBG,
MPTCP_LOGLVL_LOG);
* instead of the dupack
*/
if ((thflags & TH_FIN) &&
- !TCPS_HAVERCVDFIN(tp->t_state))
+ !TCPS_HAVERCVDFIN(tp->t_state)) {
break;
+ }
process_dupack:
#if MPTCP
/*
* so that we can process partial acks
* correctly
*/
- if (tp->ecn_flags & TE_INRECOVERY)
+ if (tp->ecn_flags & TE_INRECOVERY) {
tp->ecn_flags &= ~TE_INRECOVERY;
+ }
tcpstat.tcps_rcvdupack++;
++tp->t_dupacks;
if (tp->t_early_rexmt_count > 0 &&
TSTMP_GEQ(tcp_now,
(tp->t_early_rexmt_win +
- TCP_EARLY_REXMT_WIN)))
+ TCP_EARLY_REXMT_WIN))) {
tp->t_early_rexmt_count = 0;
+ }
/*
* Is early retransmit needed? We check for
* this when the connection is waiting for
* duplicate acks to enter fast recovery.
*/
- if (!IN_FASTRECOVERY(tp))
+ if (!IN_FASTRECOVERY(tp)) {
tcp_early_rexmt_check(tp, th);
+ }
/*
* If we've seen exactly rexmt threshold
tp->t_dupacks = 0;
tp->t_rexmtthresh = tcprexmtthresh;
} else if (tp->t_dupacks > tp->t_rexmtthresh ||
- IN_FASTRECOVERY(tp)) {
-
+ IN_FASTRECOVERY(tp)) {
/*
* If this connection was seeing packet
* reordering, then recovery might be
*/
if (SACK_ENABLED(tp) && !IN_FASTRECOVERY(tp) &&
(tp->t_flagsext &
- (TF_PKTS_REORDERED|TF_DELAY_RECOVERY)) ==
- (TF_PKTS_REORDERED|TF_DELAY_RECOVERY)) {
+ (TF_PKTS_REORDERED | TF_DELAY_RECOVERY)) ==
+ (TF_PKTS_REORDERED | TF_DELAY_RECOVERY)) {
/*
* Since the SACK information is already
* updated, this ACK will be dropped
* worth of data in flight.
*/
awnd = (tp->snd_nxt - tp->snd_fack) +
- tp->sackhint.sack_bytes_rexmit;
+ tp->sackhint.sack_bytes_rexmit;
if (awnd < tp->snd_ssthresh) {
tp->snd_cwnd += tp->t_maxseg;
- if (tp->snd_cwnd > tp->snd_ssthresh)
+ if (tp->snd_cwnd > tp->snd_ssthresh) {
tp->snd_cwnd = tp->snd_ssthresh;
+ }
}
} else {
tp->snd_cwnd += tp->t_maxseg;
}
/* Process any window updates */
- if (tiwin > tp->snd_wnd)
+ if (tiwin > tp->snd_wnd) {
tcp_update_window(tp, thflags,
th, tiwin, tlen);
+ }
tcp_ccdbg_trace(tp, th,
TCP_CC_IN_FASTRECOVERY);
break;
}
}
- if (tp->t_flags & TF_SENTFIN)
+ if (tp->t_flags & TF_SENTFIN) {
tp->snd_recover = tp->snd_max - 1;
- else
+ } else {
tp->snd_recover = tp->snd_max;
+ }
tp->t_timer[TCPT_PTO] = 0;
tp->t_rtttime = 0;
*/
if (SACK_ENABLED(tp) &&
(tp->t_flagsext &
- (TF_PKTS_REORDERED|TF_DELAY_RECOVERY))
+ (TF_PKTS_REORDERED | TF_DELAY_RECOVERY))
== TF_PKTS_REORDERED &&
!IN_FASTRECOVERY(tp) &&
tp->t_reorderwin > 0 &&
* defined a hook for tasks to run
* before entering FR, call it
*/
- if (CC_ALGO(tp)->pre_fr != NULL)
+ if (CC_ALGO(tp)->pre_fr != NULL) {
CC_ALGO(tp)->pre_fr(tp);
+ }
ENTER_FASTRECOVERY(tp);
tp->t_timer[TCPT_REXMT] = 0;
- if (TCP_ECN_ENABLED(tp))
+ if (TCP_ECN_ENABLED(tp)) {
tp->ecn_flags |= TE_SENDCWR;
+ }
if (SACK_ENABLED(tp)) {
tcpstat.tcps_sack_recovery_episode++;
~TF_CWND_NONVALIDATED;
/* Process any window updates */
- if (tiwin > tp->snd_wnd)
+ if (tiwin > tp->snd_wnd) {
tcp_update_window(
- tp, thflags,
- th, tiwin, tlen);
+ tp, thflags,
+ th, tiwin, tlen);
+ }
tcp_ccdbg_trace(tp, th,
TCP_CC_ENTER_FASTRECOVERY);
tp->snd_cwnd = tp->t_maxseg;
/* Process any window updates */
- if (tiwin > tp->snd_wnd)
+ if (tiwin > tp->snd_wnd) {
tcp_update_window(tp,
thflags,
th, tiwin, tlen);
+ }
(void) tcp_output(tp);
if (tp->t_flagsext & TF_CWND_NONVALIDATED) {
tcp_cc_adjust_nonvalidated_cwnd(tp);
} else {
tp->snd_cwnd = tp->snd_ssthresh +
- tp->t_maxseg * tp->t_dupacks;
+ tp->t_maxseg * tp->t_dupacks;
}
- if (SEQ_GT(onxt, tp->snd_nxt))
+ if (SEQ_GT(onxt, tp->snd_nxt)) {
tp->snd_nxt = onxt;
+ }
tcp_ccdbg_trace(tp, th,
TCP_CC_ENTER_FASTRECOVERY);
goto drop;
} else if (limited_txmt &&
- ALLOW_LIMITED_TRANSMIT(tp) &&
- (!(SACK_ENABLED(tp)) || sack_bytes_acked > 0) &&
- (so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)) > 0) {
+ ALLOW_LIMITED_TRANSMIT(tp) &&
+ (!(SACK_ENABLED(tp)) || sack_bytes_acked > 0) &&
+ (so->so_snd.sb_cc - (tp->snd_max - tp->snd_una)) > 0) {
u_int32_t incr = (tp->t_maxseg * tp->t_dupacks);
/* Use Limited Transmit algorithm on the first two
* recovery, the subsequent ACKs should
* not be treated as partial acks.
*/
- if (tp->ecn_flags & TE_INRECOVERY)
+ if (tp->ecn_flags & TE_INRECOVERY) {
goto process_ACK;
+ }
- if (SACK_ENABLED(tp))
+ if (SACK_ENABLED(tp)) {
tcp_sack_partialack(tp, th);
- else
+ } else {
tcp_newreno_partial_ack(tp, th);
+ }
tcp_ccdbg_trace(tp, th, TCP_CC_PARTIAL_ACK);
} else {
EXIT_FASTRECOVERY(tp);
- if (CC_ALGO(tp)->post_fr != NULL)
+ if (CC_ALGO(tp)->post_fr != NULL) {
CC_ALGO(tp)->post_fr(tp, th);
+ }
tp->t_pipeack = 0;
tcp_clear_pipeack_state(tp);
tcp_ccdbg_trace(tp, th,
TCP_CC_EXIT_FASTRECOVERY);
}
} else if ((tp->t_flagsext &
- (TF_PKTS_REORDERED|TF_DELAY_RECOVERY))
- == (TF_PKTS_REORDERED|TF_DELAY_RECOVERY)) {
+ (TF_PKTS_REORDERED | TF_DELAY_RECOVERY))
+ == (TF_PKTS_REORDERED | TF_DELAY_RECOVERY)) {
/*
* If the ack acknowledges upto snd_recover or if
* it acknowledges all the snd holes, exit
tp->t_timer[TCPT_REXMT] = 0;
tp->t_timer[TCPT_PTO] = 0;
needoutput = 1;
- } else if (tp->t_timer[TCPT_PERSIST] == 0)
+ } else if (tp->t_timer[TCPT_PERSIST] == 0) {
tp->t_timer[TCPT_REXMT] = OFFSET_FROM_START(tp,
tp->t_rxtcur);
+ }
/*
* If no data (only SYN) was ACK'd, skip rest of ACK
* processing.
*/
- if (acked == 0)
+ if (acked == 0) {
goto step6;
+ }
/*
* When outgoing data has been acked (except the SYN+data), we
*/
if ((tp->t_tfo_stats & TFO_S_SYN_DATA_SENT) &&
!(tp->t_tfo_flags & TFO_F_NO_SNDPROBING) &&
- !(th->th_flags & TH_SYN))
+ !(th->th_flags & TH_SYN)) {
tp->t_tfo_flags |= TFO_F_NO_SNDPROBING;
+ }
/*
* If TH_ECE is received, make sure that ECN is enabled
*/
if (!IN_FASTRECOVERY(tp)) {
tcp_reduce_congestion_window(tp);
- tp->ecn_flags |= (TE_INRECOVERY|TE_SENDCWR);
+ tp->ecn_flags |= (TE_INRECOVERY | TE_SENDCWR);
/*
* Also note that the connection received
* ECE atleast once
* not updated yet.
*/
if (!IN_FASTRECOVERY(tp)) {
- if (CC_ALGO(tp)->ack_rcvd != NULL)
+ if (CC_ALGO(tp)->ack_rcvd != NULL) {
CC_ALGO(tp)->ack_rcvd(tp, th);
+ }
tcp_ccdbg_trace(tp, th, TCP_CC_ACK_RCVD);
}
if (acked > so->so_snd.sb_cc) {
sbdrop(&so->so_snd, (int)so->so_snd.sb_cc);
if (so->so_flags & SOF_ENABLE_MSGS) {
so->so_msg_state->msg_serial_bytes -=
- (int)so->so_snd.sb_cc;
+ (int)so->so_snd.sb_cc;
}
ourfinisacked = 1;
} else {
sbdrop(&so->so_snd, acked);
if (so->so_flags & SOF_ENABLE_MSGS) {
so->so_msg_state->msg_serial_bytes -=
- acked;
+ acked;
}
tcp_sbsnd_trim(&so->so_snd);
tp->snd_wnd -= acked;
ourfinisacked = 0;
}
/* detect una wraparound */
- if ( !IN_FASTRECOVERY(tp) &&
+ if (!IN_FASTRECOVERY(tp) &&
SEQ_GT(tp->snd_una, tp->snd_recover) &&
- SEQ_LEQ(th->th_ack, tp->snd_recover))
+ SEQ_LEQ(th->th_ack, tp->snd_recover)) {
tp->snd_recover = th->th_ack - 1;
+ }
if (IN_FASTRECOVERY(tp) &&
- SEQ_GEQ(th->th_ack, tp->snd_recover))
+ SEQ_GEQ(th->th_ack, tp->snd_recover)) {
EXIT_FASTRECOVERY(tp);
+ }
tp->snd_una = th->th_ack;
if (SACK_ENABLED(tp)) {
- if (SEQ_GT(tp->snd_una, tp->snd_recover))
+ if (SEQ_GT(tp->snd_una, tp->snd_recover)) {
tp->snd_recover = tp->snd_una;
+ }
}
- if (SEQ_LT(tp->snd_nxt, tp->snd_una))
+ if (SEQ_LT(tp->snd_nxt, tp->snd_una)) {
tp->snd_nxt = tp->snd_una;
+ }
if (!SLIST_EMPTY(&tp->t_rxt_segments) &&
!TCP_DSACK_SEQ_IN_WINDOW(tp, tp->t_dsack_lastuna,
- tp->snd_una))
+ tp->snd_una)) {
tcp_rxtseg_clean(tp);
+ }
if ((tp->t_flagsext & TF_MEASURESNDBW) != 0 &&
- tp->t_bwmeas != NULL)
+ tp->t_bwmeas != NULL) {
tcp_bwmeas_check(tp);
+ }
/*
* sowwakeup must happen after snd_una, et al. are
*/
sowwakeup(so);
- if (!SLIST_EMPTY(&tp->t_notify_ack))
+ if (!SLIST_EMPTY(&tp->t_notify_ack)) {
tcp_notify_acknowledgement(tp, so);
+ }
switch (tp->t_state) {
-
/*
* In FIN_WAIT_1 STATE in addition to the processing
* for the ESTABLISHED state if our FIN is now acknowledged
*/
if (so->so_state & SS_CANTRCVMORE) {
tp->t_timer[TCPT_2MSL] = OFFSET_FROM_START(tp,
- TCP_CONN_MAXIDLE(tp));
+ TCP_CONN_MAXIDLE(tp));
isconnected = FALSE;
isdisconnected = TRUE;
}
DTRACE_TCP4(state__change, void, NULL,
- struct inpcb *, inp,
- struct tcpcb *, tp,
- int32_t, TCPS_FIN_WAIT_2);
+ struct inpcb *, inp,
+ struct tcpcb *, tp,
+ int32_t, TCPS_FIN_WAIT_2);
tp->t_state = TCPS_FIN_WAIT_2;
/* fall through and make sure we also recognize
* data ACKed with the FIN
}
break;
- /*
+ /*
* In CLOSING STATE in addition to the processing for
* the ESTABLISHED state if the ACK acknowledges our FIN
* then enter the TIME-WAIT state, otherwise ignore
case TCPS_CLOSING:
if (ourfinisacked) {
DTRACE_TCP4(state__change, void, NULL,
- struct inpcb *, inp,
- struct tcpcb *, tp,
- int32_t, TCPS_TIME_WAIT);
+ struct inpcb *, inp,
+ struct tcpcb *, tp,
+ int32_t, TCPS_TIME_WAIT);
tp->t_state = TCPS_TIME_WAIT;
tcp_canceltimers(tp);
if (tp->t_flagsext & TF_NOTIMEWAIT) {
/*
* Update window information.
*/
- if (tcp_update_window(tp, thflags, th, tiwin, tlen))
+ if (tcp_update_window(tp, thflags, th, tiwin, tlen)) {
needoutput = 1;
+ }
/*
* Process segments with URG.
* actually wanting to send this much urgent data.
*/
if (th->th_urp + so->so_rcv.sb_cc > sb_max) {
- th->th_urp = 0; /* XXX */
- thflags &= ~TH_URG; /* XXX */
- goto dodata; /* XXX */
+ th->th_urp = 0; /* XXX */
+ thflags &= ~TH_URG; /* XXX */
+ goto dodata; /* XXX */
}
/*
* If this segment advances the known urgent pointer,
* of data past the urgent section as the original
* spec states (in one of two places).
*/
- if (SEQ_GT(th->th_seq+th->th_urp, tp->rcv_up)) {
+ if (SEQ_GT(th->th_seq + th->th_urp, tp->rcv_up)) {
tp->rcv_up = th->th_seq + th->th_urp;
so->so_oobmark = so->so_rcv.sb_cc +
(tp->rcv_up - tp->rcv_nxt) - 1;
*/
if (th->th_urp <= (u_int32_t)tlen
#if SO_OOBINLINE
- && (so->so_options & SO_OOBINLINE) == 0
+ && (so->so_options & SO_OOBINLINE) == 0
#endif
- )
+ ) {
tcp_pulloutofband(so, th, m,
- drop_hdrlen); /* hdr drop is delayed */
+ drop_hdrlen); /* hdr drop is delayed */
+ }
} else {
/*
* If no out of band data is expected,
* pull receive urgent pointer along
* with the receive window.
*/
- if (SEQ_GT(tp->rcv_nxt, tp->rcv_up))
+ if (SEQ_GT(tp->rcv_nxt, tp->rcv_up)) {
tp->rcv_up = tp->rcv_nxt;
+ }
}
dodata:
if ((tlen || (thflags & TH_FIN)) &&
TCPS_HAVERCVDFIN(tp->t_state) == 0 &&
(TCPS_HAVEESTABLISHED(tp->t_state) ||
- (tp->t_state == TCPS_SYN_RECEIVED &&
- (tp->t_tfo_flags & TFO_F_COOKIE_VALID)))) {
+ (tp->t_state == TCPS_SYN_RECEIVED &&
+ (tp->t_tfo_flags & TFO_F_COOKIE_VALID)))) {
tcp_seq save_start = th->th_seq;
tcp_seq save_end = th->th_seq + tlen;
- m_adj(m, drop_hdrlen); /* delayed header drop */
+ m_adj(m, drop_hdrlen); /* delayed header drop */
/*
* Insert segment which includes th into TCP reassembly queue
* with control block tp. Set thflags to whether reassembly now
* connection is in streaming mode and the last
* packet was not an end-of-write
*/
- if (tp->t_flags & TF_STREAMING_ON)
+ if (tp->t_flags & TF_STREAMING_ON) {
tcp_compute_rtt(tp, &to, th);
+ }
if (DELAY_ACK(tp, th) &&
- ((tp->t_flags & TF_ACKNOW) == 0) ) {
+ ((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);
+ OFFSET_FROM_START(tp, tcp_delack);
}
- }
- else {
+ } else {
tp->t_flags |= TF_ACKNOW;
}
tp->rcv_nxt += tlen;
}
if ((tlen > 0 || (th->th_flags & TH_FIN)) && SACK_ENABLED(tp)) {
- if (th->th_flags & TH_FIN)
+ if (th->th_flags & TH_FIN) {
save_end++;
+ }
tcp_update_sack_list(tp, save_start, save_end);
}
tcp_adaptive_rwtimo_check(tp, tlen);
- if (tlen > 0)
+ if (tlen > 0) {
tcp_tfo_rcv_data(tp);
+ }
- if (tp->t_flags & TF_DELACK)
- {
+ if (tp->t_flags & TF_DELACK) {
#if INET6
if (isipv6) {
KERNEL_DEBUG(DBG_LAYER_END, ((th->th_dport << 16) | th->th_sport),
- (((ip6->ip6_src.s6_addr16[0]) << 16) | (ip6->ip6_dst.s6_addr16[0])),
- th->th_seq, th->th_ack, th->th_win);
- }
- else
+ (((ip6->ip6_src.s6_addr16[0]) << 16) | (ip6->ip6_dst.s6_addr16[0])),
+ th->th_seq, th->th_ack, th->th_win);
+ } else
#endif
{
KERNEL_DEBUG(DBG_LAYER_END, ((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);
+ (((ip->ip_src.s_addr & 0xffff) << 16) | (ip->ip_dst.s_addr & 0xffff)),
+ th->th_seq, th->th_ack, th->th_win);
}
-
}
} else {
if ((so->so_flags & SOF_MP_SUBFLOW) && tlen == 0 &&
(m->m_pkthdr.pkt_flags & PKTF_MPTCP_DFIN) &&
(m->m_pkthdr.pkt_flags & PKTF_MPTCP)) {
- m_adj(m, drop_hdrlen); /* delayed header drop */
+ m_adj(m, drop_hdrlen); /* delayed header drop */
mptcp_input(tptomptp(tp)->mpt_mpte, m);
tp->t_flags |= TF_ACKNOW;
} else {
tp->rcv_nxt++;
}
switch (tp->t_state) {
-
- /*
+ /*
* In SYN_RECEIVED and ESTABLISHED STATES
* enter the CLOSE_WAIT state.
*/
tp->t_starttime = tcp_now;
case TCPS_ESTABLISHED:
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
- struct tcpcb *, tp, int32_t, TCPS_CLOSE_WAIT);
+ struct tcpcb *, tp, int32_t, TCPS_CLOSE_WAIT);
tp->t_state = TCPS_CLOSE_WAIT;
break;
- /*
+ /*
* If still in FIN_WAIT_1 STATE FIN has not been acked so
* enter the CLOSING state.
*/
case TCPS_FIN_WAIT_1:
DTRACE_TCP4(state__change, void, NULL, struct inpcb *, inp,
- struct tcpcb *, tp, int32_t, TCPS_CLOSING);
+ struct tcpcb *, tp, int32_t, TCPS_CLOSING);
tp->t_state = TCPS_CLOSING;
break;
- /*
+ /*
* In FIN_WAIT_2 state enter the TIME_WAIT state,
* starting the time-wait timer, turning off the other
* standard timers.
*/
case TCPS_FIN_WAIT_2:
DTRACE_TCP4(state__change, void, NULL,
- struct inpcb *, inp,
- struct tcpcb *, tp,
- int32_t, TCPS_TIME_WAIT);
+ struct inpcb *, inp,
+ struct tcpcb *, tp,
+ int32_t, TCPS_TIME_WAIT);
tp->t_state = TCPS_TIME_WAIT;
tcp_canceltimers(tp);
tp->t_flags |= TF_ACKNOW;
}
}
#if TCPDEBUG
- if (so->so_options & SO_DEBUG)
+ if (so->so_options & SO_DEBUG) {
tcp_trace(TA_INPUT, ostate, tp, (void *)tcp_saveipgen,
- &tcp_savetcp, 0);
+ &tcp_savetcp, 0);
+ }
#endif
/*
socket_unlock(so, 1);
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
dropafterack:
*/
if (tp->t_state == TCPS_SYN_RECEIVED && (thflags & TH_ACK) &&
(SEQ_GT(tp->snd_una, th->th_ack) ||
- SEQ_GT(th->th_ack, tp->snd_max)) ) {
+ SEQ_GT(th->th_ack, tp->snd_max))) {
rstreason = BANDLIM_RST_OPENPORT;
IF_TCP_STATINC(ifp, dospacket);
goto dropwithreset;
}
#if TCPDEBUG
- if (so->so_options & SO_DEBUG)
+ if (so->so_options & SO_DEBUG) {
tcp_trace(TA_DROP, ostate, tp, (void *)tcp_saveipgen,
- &tcp_savetcp, 0);
+ &tcp_savetcp, 0);
+ }
#endif
m_freem(m);
tp->t_flags |= TF_ACKNOW;
/* Don't need to check timer state as we should have done it during tcp_output */
socket_unlock(so, 1);
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
dropwithresetnosock:
nosock = 1;
* Make ACK acceptable to originator of segment.
* Don't bother to respond if destination was broadcast/multicast.
*/
- if ((thflags & TH_RST) || m->m_flags & (M_BCAST|M_MCAST))
+ if ((thflags & TH_RST) || m->m_flags & (M_BCAST | M_MCAST)) {
goto drop;
+ }
#if INET6
if (isipv6) {
if (IN6_IS_ADDR_MULTICAST(&ip6->ip6_dst) ||
- IN6_IS_ADDR_MULTICAST(&ip6->ip6_src))
+ IN6_IS_ADDR_MULTICAST(&ip6->ip6_src)) {
goto drop;
+ }
} else
#endif /* INET6 */
if (IN_MULTICAST(ntohl(ip->ip_dst.s_addr)) ||
IN_MULTICAST(ntohl(ip->ip_src.s_addr)) ||
ip->ip_src.s_addr == htonl(INADDR_BROADCAST) ||
- in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif))
+ in_broadcast(ip->ip_dst, m->m_pkthdr.rcvif)) {
goto drop;
+ }
/* IPv6 anycast check is done at tcp6_input() */
/*
* Perform bandwidth limiting.
*/
#if ICMP_BANDLIM
- if (badport_bandlim(rstreason) < 0)
+ if (badport_bandlim(rstreason) < 0) {
goto drop;
+ }
#endif
#if TCPDEBUG
- if (tp == 0 || (tp->t_inpcb->inp_socket->so_options & SO_DEBUG))
+ if (tp == 0 || (tp->t_inpcb->inp_socket->so_options & SO_DEBUG)) {
tcp_trace(TA_DROP, ostate, tp, (void *)tcp_saveipgen,
- &tcp_savetcp, 0);
+ &tcp_savetcp, 0);
+ }
#endif
bzero(&tra, sizeof(tra));
tra.ifscope = ifscope;
tra.awdl_unrestricted = 1;
tra.intcoproc_allowed = 1;
- if (thflags & TH_ACK)
+ if (thflags & TH_ACK) {
/* mtod() below is safe as long as hdr dropping is delayed */
tcp_respond(tp, mtod(m, void *), th, m, (tcp_seq)0, th->th_ack,
TH_RST, &tra);
- else {
- if (thflags & TH_SYN)
+ } else {
+ if (thflags & TH_SYN) {
tlen++;
+ }
/* mtod() below is safe as long as hdr dropping is delayed */
- tcp_respond(tp, mtod(m, void *), th, m, th->th_seq+tlen,
- (tcp_seq)0, TH_RST|TH_ACK, &tra);
+ tcp_respond(tp, mtod(m, void *), th, m, th->th_seq + tlen,
+ (tcp_seq)0, TH_RST | TH_ACK, &tra);
}
/* destroy temporarily created socket */
if (dropsocket) {
} else if ((inp != NULL) && (nosock == 0)) {
socket_unlock(so, 1);
}
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
dropnosock:
nosock = 1;
* Drop space held by incoming segment and return.
*/
#if TCPDEBUG
- if (tp == 0 || (tp->t_inpcb->inp_socket->so_options & SO_DEBUG))
+ if (tp == 0 || (tp->t_inpcb->inp_socket->so_options & SO_DEBUG)) {
tcp_trace(TA_DROP, ostate, tp, (void *)tcp_saveipgen,
- &tcp_savetcp, 0);
+ &tcp_savetcp, 0);
+ }
#endif
m_freem(m);
/* destroy temporarily created socket */
if (dropsocket) {
(void) soabort(so);
socket_unlock(so, 1);
- }
- else if (nosock == 0) {
+ } else if (nosock == 0) {
socket_unlock(so, 1);
}
- KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END,0,0,0,0,0);
+ KERNEL_DEBUG(DBG_FNC_TCP_INPUT | DBG_FUNC_END, 0, 0, 0, 0, 0);
return;
}
for (; cnt > 0; cnt -= optlen, cp += optlen) {
opt = cp[0];
- if (opt == TCPOPT_EOL)
+ if (opt == TCPOPT_EOL) {
break;
- if (opt == TCPOPT_NOP)
+ }
+ if (opt == TCPOPT_NOP) {
optlen = 1;
- else {
- if (cnt < 2)
+ } else {
+ if (cnt < 2) {
break;
+ }
optlen = cp[1];
- if (optlen < 2 || optlen > cnt)
+ if (optlen < 2 || optlen > cnt) {
break;
+ }
}
switch (opt) {
-
default:
continue;
case TCPOPT_MAXSEG:
- if (optlen != TCPOLEN_MAXSEG)
+ if (optlen != TCPOLEN_MAXSEG) {
continue;
- if (!(th->th_flags & TH_SYN))
+ }
+ if (!(th->th_flags & TH_SYN)) {
continue;
+ }
bcopy((char *) cp + 2, (char *) &mss, sizeof(mss));
NTOHS(mss);
to->to_mss = mss;
break;
case TCPOPT_WINDOW:
- if (optlen != TCPOLEN_WINDOW)
+ if (optlen != TCPOLEN_WINDOW) {
continue;
- if (!(th->th_flags & TH_SYN))
+ }
+ if (!(th->th_flags & TH_SYN)) {
continue;
+ }
to->to_flags |= TOF_SCALE;
to->to_requested_s_scale = min(cp[2], TCP_MAX_WINSHIFT);
break;
case TCPOPT_TIMESTAMP:
- if (optlen != TCPOLEN_TIMESTAMP)
+ if (optlen != TCPOLEN_TIMESTAMP) {
continue;
+ }
to->to_flags |= TOF_TS;
bcopy((char *)cp + 2,
(char *)&to->to_tsval, sizeof(to->to_tsval));
NTOHL(to->to_tsecr);
/* Re-enable sending Timestamps if we received them */
if (!(tp->t_flags & TF_REQ_TSTMP) &&
- tcp_do_rfc1323 == 1)
+ tcp_do_rfc1323 == 1) {
tp->t_flags |= TF_REQ_TSTMP;
+ }
break;
case TCPOPT_SACK_PERMITTED:
if (!tcp_do_sack ||
- optlen != TCPOLEN_SACK_PERMITTED)
+ optlen != TCPOLEN_SACK_PERMITTED) {
continue;
- if (th->th_flags & TH_SYN)
+ }
+ if (th->th_flags & TH_SYN) {
to->to_flags |= TOF_SACK;
+ }
break;
case TCPOPT_SACK:
- if (optlen <= 2 || (optlen - 2) % TCPOLEN_SACK != 0)
+ if (optlen <= 2 || (optlen - 2) % TCPOLEN_SACK != 0) {
continue;
+ }
to->to_nsacks = (optlen - 2) / TCPOLEN_SACK;
to->to_sacks = cp + 2;
tcpstat.tcps_sack_rcv_blocks++;
break;
case TCPOPT_FASTOPEN:
if (optlen == TCPOLEN_FASTOPEN_REQ) {
- if (tp->t_state != TCPS_LISTEN)
+ if (tp->t_state != TCPS_LISTEN) {
continue;
+ }
to->to_flags |= TOF_TFOREQ;
} else {
if (optlen < TCPOLEN_FASTOPEN_REQ ||
(optlen - TCPOLEN_FASTOPEN_REQ) > TFO_COOKIE_LEN_MAX ||
- (optlen - TCPOLEN_FASTOPEN_REQ) < TFO_COOKIE_LEN_MIN)
+ (optlen - TCPOLEN_FASTOPEN_REQ) < TFO_COOKIE_LEN_MIN) {
continue;
+ }
if (tp->t_state != TCPS_LISTEN &&
- tp->t_state != TCPS_SYN_SENT)
+ tp->t_state != TCPS_SYN_SENT) {
continue;
+ }
to->to_flags |= TOF_TFO;
to->to_tfo = cp + 1;
tp->t_flags |= TF_RCVD_TSTMP;
tp->ts_recent = to->to_tsval;
tp->ts_recent_age = tcp_now;
-
}
- if (to->to_flags & TOF_MSS)
+ if (to->to_flags & TOF_MSS) {
tcp_mss(tp, to->to_mss, ifscope);
+ }
if (SACK_ENABLED(tp)) {
- if (!(to->to_flags & TOF_SACK))
+ if (!(to->to_flags & TOF_SACK)) {
tp->t_flagsext &= ~(TF_SACK_ENABLE);
- else
+ } else {
tp->t_flags |= TF_SACK_PERMIT;
+ }
}
if (to->to_flags & TOF_SCALE) {
tp->t_flags |= TF_RCVD_SCALE;
tp->requested_s_scale = to->to_requested_s_scale;
/* Re-enable window scaling, if the option is received */
- if (tp->request_r_scale > 0)
+ if (tp->request_r_scale > 0) {
tp->t_flags |= TF_REQ_SCALE;
+ }
}
}
tp->t_iobc = *cp;
tp->t_oobflags |= TCPOOB_HAVEDATA;
- bcopy(cp+1, cp, (unsigned)(m->m_len - cnt - 1));
+ bcopy(cp + 1, cp, (unsigned)(m->m_len - cnt - 1));
m->m_len--;
- if (m->m_flags & M_PKTHDR)
+ if (m->m_flags & M_PKTHDR) {
m->m_pkthdr.len--;
+ }
return;
}
cnt -= m->m_len;
m = m->m_next;
- if (m == 0)
+ if (m == 0) {
break;
+ }
}
panic("tcp_pulloutofband");
}
get_base_rtt(struct tcpcb *tp)
{
struct rtentry *rt = tp->t_inpcb->inp_route.ro_rt;
- return ((rt == NULL) ? 0 : rt->rtt_min);
+ return (rt == NULL) ? 0 : rt->rtt_min;
}
/* Each value of RTT base represents the minimum RTT seen in a minute.
u_int32_t base_rtt, i;
struct rtentry *rt;
- if ((rt = tp->t_inpcb->inp_route.ro_rt) == NULL)
+ if ((rt = tp->t_inpcb->inp_route.ro_rt) == NULL) {
return;
+ }
if (rt->rtt_expire_ts == 0) {
RT_LOCK_SPIN(rt);
if (rt->rtt_expire_ts != 0) {
if ((int)(tcp_now - rt->rtt_expire_ts) >=
TCP_RTT_HISTORY_EXPIRE_TIME) {
rt->rtt_index++;
- if (rt->rtt_index >= NRTT_HIST)
+ if (rt->rtt_index >= NRTT_HIST) {
rt->rtt_index = 0;
+ }
rt->rtt_hist[rt->rtt_index] = rtt;
rt->rtt_expire_ts = tcp_now;
} else {
for (i = 0; i < NRTT_HIST; ++i) {
if (rt->rtt_hist[i] != 0 &&
(rt->rtt_min == 0 ||
- rt->rtt_hist[i] < rt->rtt_min))
+ rt->rtt_hist[i] < rt->rtt_min)) {
rt->rtt_min = rt->rtt_hist[i];
+ }
}
RT_UNLOCK(rt);
} else {
rt->rtt_hist[rt->rtt_index] =
min(rt->rtt_hist[rt->rtt_index], rtt);
- if (rt->rtt_min == 0)
+ if (rt->rtt_min == 0) {
rt->rtt_min = rtt;
- else
+ } else {
rt->rtt_min = min(rt->rtt_min, rtt);
+ }
}
}
/* Compute the max of the pipeack samples */
pipe_ack_val = tcp_get_max_pipeack(tp);
tp->t_pipeack = (pipe_ack_val >
- TCP_CC_CWND_INIT_BYTES) ?
- pipe_ack_val : 0;
+ TCP_CC_CWND_INIT_BYTES) ?
+ pipe_ack_val : 0;
}
/* start another measurement */
tp->t_rtttime = 0;
}
if (((to->to_flags & TOF_TS) != 0) &&
- (to->to_tsecr != 0) &&
- TSTMP_GEQ(tcp_now, to->to_tsecr)) {
+ (to->to_tsecr != 0) &&
+ TSTMP_GEQ(tcp_now, to->to_tsecr)) {
tcp_xmit_timer(tp, (tcp_now - to->to_tsecr),
- to->to_tsecr, th->th_ack);
+ to->to_tsecr, th->th_ack);
} else if (rtt > 0) {
tcp_xmit_timer(tp, rtt, 0, th->th_ack);
}
*/
static void
tcp_xmit_timer(struct tcpcb *tp, int rtt,
- u_int32_t tsecr, tcp_seq th_ack)
+ u_int32_t tsecr, tcp_seq th_ack)
{
int delta;
*/
if (tp->t_inpcb->inp_last_outifp != NULL &&
(tp->t_inpcb->inp_last_outifp->if_eflags & IFEF_AWDL) &&
- th_ack == tp->iss + 1)
+ th_ack == tp->iss + 1) {
return;
+ }
if (tp->t_flagsext & TF_RECOMPUTE_RTT) {
if (SEQ_GT(th_ack, tp->snd_una) &&
tp->t_rttvar = max(tp->t_rttvar_prev, (rtt >> 1));
tp->t_rttvar = tp->t_rttvar << TCP_RTTVAR_SHIFT;
- if (tp->t_rttbest > (tp->t_srtt + tp->t_rttvar))
+ if (tp->t_rttbest > (tp->t_srtt + tp->t_rttvar)) {
tp->t_rttbest = tp->t_srtt + tp->t_rttvar;
+ }
goto compute_rto;
} else {
* tcp_now, this extra adjustment is not needed.
*/
delta = (rtt << TCP_DELTA_SHIFT)
- - (tp->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT));
+ - (tp->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT));
- if ((tp->t_srtt += delta) <= 0)
+ if ((tp->t_srtt += delta) <= 0) {
tp->t_srtt = 1;
+ }
/*
* We accumulate a smoothed rtt variance (actually, a
* (rttvar = rttvar*3/4 + |delta| / 4). This replaces
* rfc793's wired-in beta.
*/
- if (delta < 0)
+ if (delta < 0) {
delta = -delta;
+ }
delta -= tp->t_rttvar >> (TCP_RTTVAR_SHIFT - TCP_DELTA_SHIFT);
- if ((tp->t_rttvar += delta) <= 0)
+ if ((tp->t_rttvar += delta) <= 0) {
tp->t_rttvar = 1;
- if (tp->t_rttbest == 0 ||
- 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.
compute_rto:
nstat_route_rtt(tp->t_inpcb->inp_route.ro_rt, tp->t_srtt,
- tp->t_rttvar);
+ tp->t_rttvar);
/*
* the retransmit should happen at rtt + 4 * rttvar.
* the minimum feasible timer (which is 2 ticks).
*/
TCPT_RANGESET(tp->t_rxtcur, TCP_REXMTVAL(tp),
- max(tp->t_rttmin, rtt + 2), TCPTV_REXMTMAX,
- TCP_ADD_REXMTSLOP(tp));
+ max(tp->t_rttmin, rtt + 2), TCPTV_REXMTMAX,
+ TCP_ADD_REXMTSLOP(tp));
/*
* We received an ack for a packet that wasn't retransmitted;
interface_mtu -= CLAT46_HDR_EXPANSION_OVERHD;
}
- if (rt->rt_rmx.rmx_mtu == 0)
+ if (rt->rt_rmx.rmx_mtu == 0) {
maxmtu = interface_mtu;
- else
+ } else {
maxmtu = MIN(rt->rt_rmx.rmx_mtu, interface_mtu);
+ }
- return (maxmtu);
+ return maxmtu;
}
#if INET6
struct nd_ifinfo *ndi = NULL;
RT_LOCK_ASSERT_HELD(rt);
- if ((ndi = ND_IFINFO(rt->rt_ifp)) != NULL && !ndi->initialized)
+ if ((ndi = ND_IFINFO(rt->rt_ifp)) != NULL && !ndi->initialized) {
ndi = NULL;
- if (ndi != NULL)
+ }
+ if (ndi != NULL) {
lck_mtx_lock(&ndi->lock);
- if (rt->rt_rmx.rmx_mtu == 0)
+ }
+ if (rt->rt_rmx.rmx_mtu == 0) {
maxmtu = IN6_LINKMTU(rt->rt_ifp);
- else
+ } else {
maxmtu = MIN(rt->rt_rmx.rmx_mtu, IN6_LINKMTU(rt->rt_ifp));
- if (ndi != NULL)
+ }
+ if (ndi != NULL) {
lck_mtx_unlock(&ndi->lock);
+ }
- return (maxmtu);
+ return maxmtu;
}
#endif
RT_UNLOCK(rt);
- return (maxmtu);
+ return maxmtu;
}
/*
inp = tp->t_inpcb;
#if INET6
isipv6 = ((inp->inp_vflag & INP_IPV6) != 0) ? 1 : 0;
- min_protoh = isipv6 ? sizeof (struct ip6_hdr) + sizeof (struct tcphdr)
- : sizeof (struct tcpiphdr);
+ min_protoh = isipv6 ? sizeof(struct ip6_hdr) + sizeof(struct tcphdr)
+ : sizeof(struct tcpiphdr);
#else
#define min_protoh (sizeof (struct tcpiphdr))
#endif
#if INET6
if (isipv6) {
rt = tcp_rtlookup6(inp, input_ifscope);
- }
- else
+ } else
#endif /* INET6 */
{
rt = tcp_rtlookup(inp, input_ifscope);
if (rt == NULL) {
tp->t_maxopd = tp->t_maxseg =
#if INET6
- isipv6 ? tcp_v6mssdflt :
+ isipv6 ? tcp_v6mssdflt :
#endif /* INET6 */
- tcp_mssdflt;
+ tcp_mssdflt;
return;
}
ifp = rt->rt_ifp;
* Offer == -1 means that we didn't receive SYN yet,
* use cached value in that case;
*/
- if (offer == -1)
+ if (offer == -1) {
offer = taop->tao_mssopt;
+ }
/*
* Offer == 0 means that there was no MSS on the SYN segment,
* in this case we use tcp_mssdflt.
*/
- if (offer == 0)
+ if (offer == 0) {
offer =
#if INET6
- isipv6 ? tcp_v6mssdflt :
+ isipv6 ? tcp_v6mssdflt :
#endif /* INET6 */
- tcp_mssdflt;
- else {
+ tcp_mssdflt;
+ } else {
/*
* Prevent DoS attack with too small MSS. Round up
* to at least minmss.
if (rt->rt_rmx.rmx_mtu == 0) {
#if INET6
if (isipv6) {
- if (!isnetlocal)
+ if (!isnetlocal) {
mss = min(mss, tcp_v6mssdflt);
+ }
} else
#endif /* INET6 */
- if (!isnetlocal)
+ if (!isnetlocal) {
mss = min(mss, tcp_mssdflt);
+ }
}
mss = min(mss, offer);
* origoffer==-1 indicates, that no segments were received yet.
* In this case we just guess.
*/
- if ((tp->t_flags & (TF_REQ_TSTMP|TF_NOOPT)) == TF_REQ_TSTMP &&
+ if ((tp->t_flags & (TF_REQ_TSTMP | TF_NOOPT)) == TF_REQ_TSTMP &&
(origoffer == -1 ||
- (tp->t_flags & TF_RCVD_TSTMP) == TF_RCVD_TSTMP))
+ (tp->t_flags & TF_RCVD_TSTMP) == TF_RCVD_TSTMP)) {
mss -= TCPOLEN_TSTAMP_APPA;
+ }
#if MPTCP
mss -= mptcp_adj_mss(tp, FALSE);
bufsize = rt->rt_rmx.rmx_sendpipe;
if (bufsize < so->so_snd.sb_hiwat)
#endif
- bufsize = so->so_snd.sb_hiwat;
- if (bufsize < mss)
+ bufsize = so->so_snd.sb_hiwat;
+ if (bufsize < mss) {
mss = bufsize;
- else {
+ } else {
bufsize = (((bufsize + (u_int64_t)mss - 1) / (u_int64_t)mss) * (u_int64_t)mss);
- if (bufsize > sb_max_corrected)
+ if (bufsize > sb_max_corrected) {
bufsize = sb_max_corrected;
+ }
(void)sbreserve(&so->so_snd, bufsize);
}
tp->t_maxseg = mss;
bufsize = rt->rt_rmx.rmx_recvpipe;
if (bufsize < so->so_rcv.sb_hiwat)
#endif
- bufsize = so->so_rcv.sb_hiwat;
+ bufsize = so->so_rcv.sb_hiwat;
if (bufsize > mss) {
bufsize = (((bufsize + (u_int64_t)mss - 1) / (u_int64_t)mss) * (u_int64_t)mss);
- if (bufsize > sb_max_corrected)
+ if (bufsize > sb_max_corrected) {
bufsize = sb_max_corrected;
+ }
(void)sbreserve(&so->so_rcv, bufsize);
}
* Set the slow-start flight size depending on whether this
* is a local network or not.
*/
- if (CC_ALGO(tp)->cwnd_init != NULL)
+ if (CC_ALGO(tp)->cwnd_init != NULL) {
CC_ALGO(tp)->cwnd_init(tp);
+ }
tcp_ccdbg_trace(tp, NULL, TCP_CC_CWND_INIT);
#if INET6
isipv6 = ((tp->t_inpcb->inp_vflag & INP_IPV6) != 0) ? 1 : 0;
- min_protoh = isipv6 ? sizeof (struct ip6_hdr) + sizeof (struct tcphdr)
- : sizeof (struct tcpiphdr);
+ min_protoh = isipv6 ? sizeof(struct ip6_hdr) + sizeof(struct tcphdr)
+ : sizeof(struct tcpiphdr);
#else
#define min_protoh (sizeof (struct tcpiphdr))
#endif
#if INET6
- if (isipv6)
+ if (isipv6) {
rt = tcp_rtlookup6(tp->t_inpcb, IFSCOPE_NONE);
- else
+ } else
#endif /* INET6 */
rt = tcp_rtlookup(tp->t_inpcb, IFSCOPE_NONE);
if (rt == NULL) {
- return (
+ return
#if INET6
- isipv6 ? tcp_v6mssdflt :
+ isipv6 ? tcp_v6mssdflt :
#endif /* INET6 */
- tcp_mssdflt);
+ tcp_mssdflt;
}
/*
* Slower link window correction:
mss = necp_socket_get_effective_mtu(tp->t_inpcb, mss);
#endif /* NECP */
- return (mss - min_protoh);
+ return mss - min_protoh;
}
/*
static void
tcp_newreno_partial_ack(struct tcpcb *tp, struct tcphdr *th)
{
- tcp_seq onxt = tp->snd_nxt;
- u_int32_t ocwnd = tp->snd_cwnd;
- tp->t_timer[TCPT_REXMT] = 0;
- tp->t_timer[TCPT_PTO] = 0;
- tp->t_rtttime = 0;
- tp->snd_nxt = th->th_ack;
- /*
- * Set snd_cwnd to one segment beyond acknowledged offset
- * (tp->snd_una has not yet been updated when this function
- * is called)
- */
- tp->snd_cwnd = tp->t_maxseg + BYTES_ACKED(th, tp);
- tp->t_flags |= TF_ACKNOW;
- (void) tcp_output(tp);
- tp->snd_cwnd = ocwnd;
- if (SEQ_GT(onxt, tp->snd_nxt))
- tp->snd_nxt = onxt;
- /*
- * Partial window deflation. Relies on fact that tp->snd_una
- * not updated yet.
- */
- if (tp->snd_cwnd > BYTES_ACKED(th, tp))
- tp->snd_cwnd -= BYTES_ACKED(th, tp);
- else
- tp->snd_cwnd = 0;
- tp->snd_cwnd += tp->t_maxseg;
+ tcp_seq onxt = tp->snd_nxt;
+ u_int32_t ocwnd = tp->snd_cwnd;
+ tp->t_timer[TCPT_REXMT] = 0;
+ tp->t_timer[TCPT_PTO] = 0;
+ tp->t_rtttime = 0;
+ tp->snd_nxt = th->th_ack;
+ /*
+ * Set snd_cwnd to one segment beyond acknowledged offset
+ * (tp->snd_una has not yet been updated when this function
+ * is called)
+ */
+ tp->snd_cwnd = tp->t_maxseg + BYTES_ACKED(th, tp);
+ tp->t_flags |= TF_ACKNOW;
+ (void) tcp_output(tp);
+ tp->snd_cwnd = ocwnd;
+ if (SEQ_GT(onxt, tp->snd_nxt)) {
+ tp->snd_nxt = onxt;
+ }
+ /*
+ * Partial window deflation. Relies on fact that tp->snd_una
+ * not updated yet.
+ */
+ if (tp->snd_cwnd > BYTES_ACKED(th, tp)) {
+ tp->snd_cwnd -= BYTES_ACKED(th, tp);
+ } else {
+ tp->snd_cwnd = 0;
+ }
+ tp->snd_cwnd += tp->t_maxseg;
}
/*
struct inpcb *inp = NULL;
struct tcpcb *tp;
- if ((head->so_options & SO_ACCEPTCONN) == 0)
- return (0);
+ if ((head->so_options & SO_ACCEPTCONN) == 0) {
+ return 0;
+ }
- if (TAILQ_EMPTY(&head->so_incomp))
- return (0);
+ if (TAILQ_EMPTY(&head->so_incomp)) {
+ return 0;
+ }
so_acquire_accept_list(head, NULL);
socket_unlock(head, 0);
tp = intotcpcb(inp);
if (tp != NULL && tp->t_state == TCPS_CLOSED &&
so->so_head != NULL &&
- (so->so_state & (SS_INCOMP|SS_CANTSENDMORE|SS_CANTRCVMORE)) ==
- (SS_INCOMP|SS_CANTSENDMORE|SS_CANTRCVMORE)) {
+ (so->so_state & (SS_INCOMP | SS_CANTSENDMORE | SS_CANTRCVMORE)) ==
+ (SS_INCOMP | SS_CANTSENDMORE | SS_CANTRCVMORE)) {
/*
* The listen socket is already locked but we
* can lock this socket here without lock ordering
}
qlen = head->so_incqlen;
- if (rnd == 0)
+ if (rnd == 0) {
rnd = RandomULong();
+ }
if (++cur_cnt > qlen || old_cnt > qlen) {
rnd = (314159 * rnd + 66329) & 0xffff;
j = ((qlen + 1) * rnd) >> 16;
- while (j-- && so)
+ while (j-- && so) {
so = TAILQ_NEXT(so, so_list);
+ }
}
/* Find a connection that is not already closing (or being served) */
while (so) {
so->so_usecount++;
if ((so->so_usecount == 2) &&
(so->so_state & SS_INCOMP) &&
- !(so->so_flags & SOF_INCOMP_INPROGRESS)) {
+ !(so->so_flags & SOF_INCOMP_INPROGRESS)) {
break;
} else {
/*
if (so == NULL) {
socket_lock(head, 0);
so_release_accept_list(head);
- return (0);
+ return 0;
}
/* Makes sure socket is still in the right state to be discarded */
socket_unlock(so, 1);
socket_lock(head, 0);
so_release_accept_list(head);
- return (0);
+ return 0;
}
found_victim:
socket_unlock(so, 1);
socket_lock(head, 0);
so_release_accept_list(head);
- return (0);
+ return 0;
}
socket_lock(head, 0);
tcpstat.tcps_drops++;
socket_lock(head, 0);
- return(1);
+ return 1;
}
/* Set background congestion control on a socket */
void
tcp_set_foreground_cc(struct socket *so)
{
- if (tcp_use_newreno)
+ if (tcp_use_newreno) {
tcp_set_new_cc(so, TCP_CC_ALGO_NEWRENO_INDEX);
- else
+ } else {
tcp_set_new_cc(so, TCP_CC_ALGO_CUBIC_INDEX);
+ }
}
static void
struct tcpcb *tp = intotcpcb(inp);
u_char old_cc_index = 0;
if (tp->tcp_cc_index != cc_index) {
-
old_cc_index = tp->tcp_cc_index;
- if (CC_ALGO(tp)->cleanup != NULL)
+ if (CC_ALGO(tp)->cleanup != NULL) {
CC_ALGO(tp)->cleanup(tp);
+ }
tp->tcp_cc_index = cc_index;
tcp_cc_allocate_state(tp);
- if (CC_ALGO(tp)->switch_to != NULL)
+ if (CC_ALGO(tp)->switch_to != NULL) {
CC_ALGO(tp)->switch_to(tp, old_cc_index);
+ }
tcp_ccdbg_trace(tp, NULL, TCP_CC_CHANGE_ALGO);
}
void
tcp_set_recv_bg(struct socket *so)
{
- if (!IS_TCP_RECV_BG(so))
+ if (!IS_TCP_RECV_BG(so)) {
so->so_flags1 |= SOF1_TRAFFIC_MGT_TCP_RECVBG;
+ }
/* Unset Large Receive Offload on background sockets */
so_set_lro(so, SO_TC_BK);
void
tcp_clear_recv_bg(struct socket *so)
{
- if (IS_TCP_RECV_BG(so))
+ if (IS_TCP_RECV_BG(so)) {
so->so_flags1 &= ~(SOF1_TRAFFIC_MGT_TCP_RECVBG);
+ }
/*
* Set/unset use of Large Receive Offload depending on
* Back off the slow-start threshold and enter
* congestion avoidance phase
*/
- if (CC_ALGO(tp)->pre_fr != NULL)
+ if (CC_ALGO(tp)->pre_fr != NULL) {
CC_ALGO(tp)->pre_fr(tp);
+ }
tp->snd_cwnd = tp->snd_ssthresh;
tp->t_flagsext &= ~TF_CWND_NONVALIDATED;
NULL);
}
}
- if (caller != PROC_NULL)
+ if (caller != PROC_NULL) {
proc_rele(caller);
+ }
if (tcp_disable_access_to_stats &&
!kauth_cred_issuser(kauth_cred_get())) {
bzero(&zero_stat, sizeof(zero_stat));
#endif /* !CONFIG_EMBEDDED */
if (req->oldptr == 0) {
- req->oldlen= (size_t)sizeof(struct tcpstat);
+ req->oldlen = (size_t)sizeof(struct tcpstat);
}
- error = SYSCTL_OUT(req, stat, MIN(sizeof (tcpstat), req->oldlen));
-
- return (error);
+ error = SYSCTL_OUT(req, stat, MIN(sizeof(tcpstat), req->oldlen));
+ return error;
}
/*
struct ip *ip = mtod(m, struct ip *);
struct ipovly *ipov = (struct ipovly *)ip;
- if (m->m_pkthdr.pkt_flags & PKTF_SW_LRO_DID_CSUM)
- return (0);
+ if (m->m_pkthdr.pkt_flags & PKTF_SW_LRO_DID_CSUM) {
+ return 0;
+ }
/* ip_stripoptions() must have been called before we get here */
- ASSERT((ip->ip_hl << 2) == sizeof (*ip));
+ ASSERT((ip->ip_hl << 2) == sizeof(*ip));
if ((hwcksum_rx || (ifp->if_flags & IFF_LOOPBACK) ||
(m->m_pkthdr.pkt_flags & PKTF_LOOP)) &&
uint32_t swbytes = (uint32_t)trailer;
if (start < off) {
- ip->ip_len += sizeof (*ip);
+ ip->ip_len += sizeof(*ip);
#if BYTE_ORDER != BIG_ENDIAN
HTONS(ip->ip_len);
HTONS(ip->ip_off);
/* callee folds in sum */
sum = m_adj_sum16(m, start, off,
tlen, sum);
- if (off > start)
+ if (off > start) {
swbytes += (off - start);
- else
+ } else {
swbytes += (start - off);
+ }
if (start < off) {
#if BYTE_ORDER != BIG_ENDIAN
NTOHS(ip->ip_off);
NTOHS(ip->ip_len);
#endif /* BYTE_ORDER != BIG_ENDIAN */
- ip->ip_len -= sizeof (*ip);
+ ip->ip_len -= sizeof(*ip);
}
- if (swbytes != 0)
+ if (swbytes != 0) {
tcp_in_cksum_stats(swbytes);
- if (trailer != 0)
+ }
+ if (trailer != 0) {
m_adj(m, -trailer);
+ }
}
/* callee folds in sum */
int len;
char b[9];
- bcopy(ipov->ih_x1, b, sizeof (ipov->ih_x1));
- 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));
ip_sum = ipov->ih_len;
ipov->ih_len = (u_short)tlen;
#if BYTE_ORDER != BIG_ENDIAN
HTONS(ipov->ih_len);
#endif
- len = sizeof (struct ip) + tlen;
+ len = sizeof(struct ip) + tlen;
th->th_sum = in_cksum(m, len);
- bcopy(b, ipov->ih_x1, sizeof (ipov->ih_x1));
+ bcopy(b, ipov->ih_x1, sizeof(ipov->ih_x1));
ipov->ih_len = ip_sum;
tcp_in_cksum_stats(len);
case AF_INET6: {
struct ip6_hdr *ip6 = mtod(m, struct ip6_hdr *);
- if (m->m_pkthdr.pkt_flags & PKTF_SW_LRO_DID_CSUM)
- return (0);
+ if (m->m_pkthdr.pkt_flags & PKTF_SW_LRO_DID_CSUM) {
+ return 0;
+ }
if ((hwcksum_rx || (ifp->if_flags & IFF_LOOPBACK) ||
(m->m_pkthdr.pkt_flags & PKTF_LOOP)) &&
if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src)) {
s = ip6->ip6_src.s6_addr16[1];
- ip6->ip6_src.s6_addr16[1] = 0 ;
+ ip6->ip6_src.s6_addr16[1] = 0;
}
if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst)) {
d = ip6->ip6_dst.s6_addr16[1];
/* callee folds in sum */
sum = m_adj_sum16(m, start, off,
tlen, sum);
- if (off > start)
+ if (off > start) {
swbytes += (off - start);
- else
+ } else {
swbytes += (start - off);
+ }
- if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src))
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_src)) {
ip6->ip6_src.s6_addr16[1] = s;
- if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst))
+ }
+ if (IN6_IS_SCOPE_EMBED(&ip6->ip6_dst)) {
ip6->ip6_dst.s6_addr16[1] = d;
+ }
- if (swbytes != 0)
+ if (swbytes != 0) {
tcp_in6_cksum_stats(swbytes);
- if (trailer != 0)
+ }
+ if (trailer != 0) {
m_adj(m, -trailer);
+ }
}
th->th_sum = in6_pseudo(
- &ip6->ip6_src, &ip6->ip6_dst,
- sum + htonl(tlen + IPPROTO_TCP));
+ &ip6->ip6_src, &ip6->ip6_dst,
+ sum + htonl(tlen + IPPROTO_TCP));
}
th->th_sum ^= 0xffff;
} else {
if (th->th_sum != 0) {
tcpstat.tcps_rcvbadsum++;
IF_TCP_STATINC(ifp, badformat);
- return (-1);
+ return -1;
}
- return (0);
+ return 0;
}
int error, val = tcprexmtthresh;
error = sysctl_handle_int(oidp, &val, 0, req);
- if (error || !req->newptr)
- return (error);
+ if (error || !req->newptr) {
+ return error;
+ }
/*
* Constrain the number of duplicate ACKs
* to either 2 or 3
*/
- if (val < 2 || val > 3)
- return (EINVAL);
+ if (val < 2 || val > 3) {
+ return EINVAL;
+ }
- tcprexmtthresh = val;
+ tcprexmtthresh = val;
- return (0);
+ return 0;
}
SYSCTL_PROC(_net_inet_tcp, OID_AUTO, rexmt_thresh, CTLTYPE_INT | CTLFLAG_RW |
- CTLFLAG_LOCKED, &tcprexmtthresh, 0, &sysctl_rexmtthresh, "I",
- "Duplicate ACK Threshold for Fast Retransmit");
+ CTLFLAG_LOCKED, &tcprexmtthresh, 0, &sysctl_rexmtthresh, "I",
+ "Duplicate ACK Threshold for Fast Retransmit");
projects / apple / xnu.git / blobdiff