/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
#include <net/if.h>
#include <net/route.h>
+#include <net/ntstat.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet6/ipsec.h>
#endif /*IPSEC*/
+void tcp_fill_info(struct tcpcb *, struct tcp_info *);
+errno_t tcp_fill_info_for_info_tuple(struct info_tuple *, struct tcp_info *);
+
+int tcp_sysctl_info(struct sysctl_oid *, void *, int , struct sysctl_req *);
+
/*
* TCP protocol interface to socket abstraction.
*/
static struct tcpcb *
tcp_usrclosed(struct tcpcb *);
+static u_int32_t tcps_in_sw_cksum;
+SYSCTL_UINT(_net_inet_tcp, OID_AUTO, in_sw_cksum, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcps_in_sw_cksum, 0,
+ "Number of received packets checksummed in software");
+
+static u_int64_t tcps_in_sw_cksum_bytes;
+SYSCTL_QUAD(_net_inet_tcp, OID_AUTO, in_sw_cksum_bytes, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcps_in_sw_cksum_bytes,
+ "Amount of received data checksummed in software");
+
+static u_int32_t tcps_out_sw_cksum;
+SYSCTL_UINT(_net_inet_tcp, OID_AUTO, out_sw_cksum, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcps_out_sw_cksum, 0,
+ "Number of transmitted packets checksummed in software");
+
+static u_int64_t tcps_out_sw_cksum_bytes;
+SYSCTL_QUAD(_net_inet_tcp, OID_AUTO, out_sw_cksum_bytes, CTLFLAG_RD | CTLFLAG_LOCKED,
+ &tcps_out_sw_cksum_bytes,
+ "Amount of transmitted data checksummed in software");
+
+extern uint32_t tcp_autorcvbuf_max;
+
+extern void tcp_sbrcv_trim(struct tcpcb *tp, struct sockbuf *sb);
+
#if TCPDEBUG
#define TCPDEBUG0 int ostate = 0
#define TCPDEBUG1() ostate = tp ? tp->t_state : 0
#define TCPDEBUG2(req)
#endif
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, info, CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_ANYBODY,
+ 0 , 0, tcp_sysctl_info, "S", "TCP info per tuple");
+
/*
* TCP attaches to socket via pru_attach(), reserving space,
* and an internet control block.
+ *
+ * Returns: 0 Success
+ * EISCONN
+ * tcp_attach:ENOBUFS
+ * tcp_attach:ENOMEM
+ * tcp_attach:??? [IPSEC specific]
*/
static int
-tcp_usr_attach(struct socket *so, int proto, struct proc *p)
+tcp_usr_attach(struct socket *so, __unused int proto, struct proc *p)
{
int error;
struct inpcb *inp = sotoinpcb(so);
error = EISCONN;
goto out;
}
-
+
error = tcp_attach(so, p);
if (error)
goto out;
if (inp == 0 || (inp->inp_state == INPCB_STATE_DEAD)) {
return EINVAL; /* XXX */
}
-#if 1
- lck_mtx_assert(((struct inpcb *)so->so_pcb)->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
-#endif
+ lck_mtx_assert(&((struct inpcb *)so->so_pcb)->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
tp = intotcpcb(inp);
/* In case we got disconnected from the peer */
if (tp == 0)
goto out;
TCPDEBUG1();
+
+ calculate_tcp_clock();
+
tp = tcp_disconnect(tp);
out:
TCPDEBUG2(PRU_DETACH);
} \
tp = intotcpcb(inp); \
TCPDEBUG1(); \
+ calculate_tcp_clock(); \
} while(0)
#define COMMON_END(req) out: TCPDEBUG2(req); return error; goto out
/*
* Give the socket an address.
+ *
+ * Returns: 0 Success
+ * EINVAL Invalid argument [COMMON_START]
+ * EAFNOSUPPORT Address family not supported
+ * in_pcbbind:EADDRNOTAVAIL Address not available.
+ * in_pcbbind:EINVAL Invalid argument
+ * in_pcbbind:EAFNOSUPPORT Address family not supported [notdef]
+ * in_pcbbind:EACCES Permission denied
+ * in_pcbbind:EADDRINUSE Address in use
+ * in_pcbbind:EAGAIN Resource unavailable, try again
+ * in_pcbbind:EPERM Operation not permitted
*/
static int
tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
COMMON_START();
+ if (nam->sa_family != 0 && nam->sa_family != AF_INET) {
+ error = EAFNOSUPPORT;
+ goto out;
+ }
+
/*
* Must check for multicast addresses and disallow binding
* to them.
*/
- sinp = (struct sockaddr_in *)nam;
+ sinp = (struct sockaddr_in *)(void *)nam;
if (sinp->sin_family == AF_INET &&
IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) {
error = EAFNOSUPPORT;
COMMON_START();
+ if (nam->sa_family != 0 && nam->sa_family != AF_INET6) {
+ error = EAFNOSUPPORT;
+ goto out;
+ }
+
/*
* Must check for multicast addresses and disallow binding
* to them.
*/
- sin6p = (struct sockaddr_in6 *)nam;
+ sin6p = (struct sockaddr_in6 *)(void *)nam;
if (sin6p->sin6_family == AF_INET6 &&
IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) {
error = EAFNOSUPPORT;
/*
* Prepare to accept connections.
+ *
+ * Returns: 0 Success
+ * EINVAL [COMMON_START]
+ * in_pcbbind:EADDRNOTAVAIL Address not available.
+ * in_pcbbind:EINVAL Invalid argument
+ * in_pcbbind:EAFNOSUPPORT Address family not supported [notdef]
+ * in_pcbbind:EACCES Permission denied
+ * in_pcbbind:EADDRINUSE Address in use
+ * in_pcbbind:EAGAIN Resource unavailable, try again
+ * in_pcbbind:EPERM Operation not permitted
*/
static int
tcp_usr_listen(struct socket *so, struct proc *p)
struct tcpcb *tp;
struct sockaddr_in *sinp;
- COMMON_START();
+ TCPDEBUG0;
+ if (inp == 0)
+ return EINVAL;
+ else if (inp->inp_state == INPCB_STATE_DEAD) {
+ if (so->so_error) {
+ error = so->so_error;
+ so->so_error = 0;
+ return error;
+ } else
+ return EINVAL;
+ }
+ tp = intotcpcb(inp);
+ TCPDEBUG1();
+
+ calculate_tcp_clock();
+ if (nam->sa_family != 0 && nam->sa_family != AF_INET) {
+ error = EAFNOSUPPORT;
+ goto out;
+ }
/*
* Must disallow TCP ``connections'' to multicast addresses.
*/
- sinp = (struct sockaddr_in *)nam;
+ sinp = (struct sockaddr_in *)(void *)nam;
if (sinp->sin_family == AF_INET
&& IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) {
error = EAFNOSUPPORT;
goto out;
}
-#ifndef __APPLE__
- prison_remote_ip(p, 0, &sinp->sin_addr.s_addr);
-#endif
if ((error = tcp_connect(tp, nam, p)) != 0)
goto out;
COMMON_START();
+ if (nam->sa_family != 0 && nam->sa_family != AF_INET6) {
+ error = EAFNOSUPPORT;
+ goto out;
+ }
+
/*
* Must disallow TCP ``connections'' to multicast addresses.
*/
- sin6p = (struct sockaddr_in6 *)nam;
+ sin6p = (struct sockaddr_in6 *)(void *)nam;
if (sin6p->sin6_family == AF_INET6
&& IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) {
error = EAFNOSUPPORT;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
-#if 1
- lck_mtx_assert(((struct inpcb *)so->so_pcb)->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
-#endif
+ lck_mtx_assert(&((struct inpcb *)so->so_pcb)->inpcb_mtx, LCK_MTX_ASSERT_OWNED);
COMMON_START();
/* In case we got disconnected from the peer */
if (tp == 0)
struct tcpcb *tp = NULL;
TCPDEBUG0;
+ in_setpeeraddr(so, nam);
+
if (so->so_state & SS_ISDISCONNECTED) {
error = ECONNABORTED;
goto out;
}
tp = intotcpcb(inp);
TCPDEBUG1();
- in_setpeeraddr(so, nam);
+
+ calculate_tcp_clock();
+
COMMON_END(PRU_ACCEPT);
}
}
tp = intotcpcb(inp);
TCPDEBUG1();
+
+ calculate_tcp_clock();
+
in6_mapped_peeraddr(so, nam);
COMMON_END(PRU_ACCEPT);
}
#endif /* INET6 */
+
/*
* Mark the connection as being incapable of further output.
+ *
+ * Returns: 0 Success
+ * EINVAL [COMMON_START]
+ * tcp_output:EADDRNOTAVAIL
+ * tcp_output:ENOBUFS
+ * tcp_output:EMSGSIZE
+ * tcp_output:EHOSTUNREACH
+ * tcp_output:ENETUNREACH
+ * tcp_output:ENETDOWN
+ * tcp_output:ENOMEM
+ * tcp_output:EACCES
+ * tcp_output:EMSGSIZE
+ * tcp_output:ENOBUFS
+ * tcp_output:??? [ignorable: mostly IPSEC/firewall/DLIL]
*/
static int
tcp_usr_shutdown(struct socket *so)
* After a receive, possibly send window update to peer.
*/
static int
-tcp_usr_rcvd(struct socket *so, int flags)
+tcp_usr_rcvd(struct socket *so, __unused int flags)
{
int error = 0;
struct inpcb *inp = sotoinpcb(so);
/* In case we got disconnected from the peer */
if (tp == 0)
goto out;
+ tcp_sbrcv_trim(tp, &so->so_rcv);
+
tcp_output(tp);
COMMON_END(PRU_RCVD);
}
* pru_*() routines, the mbuf chains are our responsibility. We
* must either enqueue them or free them. The other pru_* routines
* generally are caller-frees.
+ *
+ * Returns: 0 Success
+ * ECONNRESET
+ * EINVAL
+ * ENOBUFS
+ * tcp_connect:EADDRINUSE Address in use
+ * tcp_connect:EADDRNOTAVAIL Address not available.
+ * tcp_connect:EINVAL Invalid argument
+ * tcp_connect:EAFNOSUPPORT Address family not supported [notdef]
+ * tcp_connect:EACCES Permission denied
+ * tcp_connect:EAGAIN Resource unavailable, try again
+ * tcp_connect:EPERM Operation not permitted
+ * tcp_output:EADDRNOTAVAIL
+ * tcp_output:ENOBUFS
+ * tcp_output:EMSGSIZE
+ * tcp_output:EHOSTUNREACH
+ * tcp_output:ENETUNREACH
+ * tcp_output:ENETDOWN
+ * tcp_output:ENOMEM
+ * tcp_output:EACCES
+ * tcp_output:EMSGSIZE
+ * tcp_output:ENOBUFS
+ * tcp_output:??? [ignorable: mostly IPSEC/firewall/DLIL]
+ * tcp6_connect:??? [IPV6 only]
*/
static int
tcp_usr_send(struct socket *so, int flags, struct mbuf *m,
#endif /* INET6 */
tp = intotcpcb(inp);
TCPDEBUG1();
+
+ calculate_tcp_clock();
+
if (control) {
/* TCP doesn't do control messages (rights, creds, etc) */
if (control->m_len) {
m_freem(control); /* empty control, just free it */
}
if(!(flags & PRUS_OOB)) {
- sbappend(&so->so_snd, m);
+ sbappendstream(&so->so_snd, m);
if (nam && tp->t_state < TCPS_SYN_SENT) {
/*
* Do implied connect if not yet connected,
error = tcp6_connect(tp, nam, p);
else
#endif /* INET6 */
- error = tcp_connect(tp, nam, p);
+ error = tcp_connect(tp, nam, p);
if (error)
goto out;
tp->snd_wnd = TTCP_CLIENT_SND_WND;
- tcp_mss(tp, -1);
+ tcp_mss(tp, -1, IFSCOPE_NONE);
}
if (flags & PRUS_EOF) {
tp->t_flags &= ~TF_MORETOCOME;
}
} else {
- if (sbspace(&so->so_snd) < -512) {
+ if (sbspace(&so->so_snd) == 0) {
+ /* if no space is left in sockbuf,
+ * do not try to squeeze in OOB traffic */
m_freem(m);
error = ENOBUFS;
goto out;
* of data past the urgent section.
* Otherwise, snd_up should be one lower.
*/
- sbappend(&so->so_snd, m);
+ sbappendstream(&so->so_snd, m);
if (nam && tp->t_state < TCPS_SYN_SENT) {
/*
* Do implied connect if not yet connected,
if (error)
goto out;
tp->snd_wnd = TTCP_CLIENT_SND_WND;
- tcp_mss(tp, -1);
+ tcp_mss(tp, -1, IFSCOPE_NONE);
}
tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
tp->t_force = 1;
/*
* Receive out-of-band data.
+ *
+ * Returns: 0 Success
+ * EINVAL [COMMON_START]
+ * EINVAL
+ * EWOULDBLOCK
*/
static int
tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags)
* sending CC options and if the connection duration was < MSL, then
* truncate the previous TIME-WAIT state and proceed.
* Initialize connection parameters and enter SYN-SENT state.
+ *
+ * Returns: 0 Success
+ * EADDRINUSE
+ * EINVAL
+ * in_pcbbind:EADDRNOTAVAIL Address not available.
+ * in_pcbbind:EINVAL Invalid argument
+ * in_pcbbind:EAFNOSUPPORT Address family not supported [notdef]
+ * in_pcbbind:EACCES Permission denied
+ * in_pcbbind:EADDRINUSE Address in use
+ * in_pcbbind:EAGAIN Resource unavailable, try again
+ * in_pcbbind:EPERM Operation not permitted
+ * in_pcbladdr:EINVAL Invalid argument
+ * in_pcbladdr:EAFNOSUPPORT Address family not supported
+ * in_pcbladdr:EADDRNOTAVAIL Address not available
*/
static int
tcp_connect(tp, nam, p)
struct inpcb *inp = tp->t_inpcb, *oinp;
struct socket *so = inp->inp_socket;
struct tcpcb *otp;
- struct sockaddr_in *sin = (struct sockaddr_in *)nam;
- struct sockaddr_in *ifaddr;
+ struct sockaddr_in *sin = (struct sockaddr_in *)(void *)nam;
+ struct sockaddr_in ifaddr;
struct rmxp_tao *taop;
struct rmxp_tao tao_noncached;
int error;
+ struct ifnet *outif = NULL;
if (inp->inp_lport == 0) {
error = in_pcbbind(inp, (struct sockaddr *)0, p);
* earlier incarnation of this same connection still in
* TIME_WAIT state, creating an ADDRINUSE error.
*/
- error = in_pcbladdr(inp, nam, &ifaddr);
+ error = in_pcbladdr(inp, nam, &ifaddr, &outif);
if (error)
return error;
oinp = in_pcblookup_hash(inp->inp_pcbinfo,
sin->sin_addr, sin->sin_port,
inp->inp_laddr.s_addr != INADDR_ANY ? inp->inp_laddr
- : ifaddr->sin_addr,
+ : ifaddr.sin_addr,
inp->inp_lport, 0, NULL);
tcp_lock(inp->inp_socket, 0, 0);
if (oinp != inp && (otp = intotcpcb(oinp)) != NULL &&
otp->t_state == TCPS_TIME_WAIT &&
- otp->t_starttime < tcp_msl &&
+ ((int)(tcp_now - otp->t_starttime)) < tcp_msl &&
(otp->t_flags & TF_RCVD_CC))
otp = tcp_close(otp);
else {
- printf("tcp_connect: inp=%x err=EADDRINUSE\n", inp);
+ printf("tcp_connect: inp=%p err=EADDRINUSE\n", inp);
if (oinp != inp)
tcp_unlock(oinp->inp_socket, 1, 0);
return EADDRINUSE;
tcp_unlock(oinp->inp_socket, 1, 0);
}
skip_oinp:
- if ((inp->inp_laddr.s_addr == INADDR_ANY ? ifaddr->sin_addr.s_addr :
+ if ((inp->inp_laddr.s_addr == INADDR_ANY ? ifaddr.sin_addr.s_addr :
inp->inp_laddr.s_addr) == sin->sin_addr.s_addr &&
inp->inp_lport == sin->sin_port)
return EINVAL;
lck_rw_lock_exclusive(inp->inp_pcbinfo->mtx);
socket_lock(inp->inp_socket, 0);
}
- if (inp->inp_laddr.s_addr == INADDR_ANY)
- inp->inp_laddr = ifaddr->sin_addr;
+ if (inp->inp_laddr.s_addr == INADDR_ANY) {
+ inp->inp_laddr = ifaddr.sin_addr;
+ inp->inp_last_outifp = outif;
+ }
inp->inp_faddr = sin->sin_addr;
inp->inp_fport = sin->sin_port;
in_pcbrehash(inp);
lck_rw_done(inp->inp_pcbinfo->mtx);
- /* Compute window scaling to request. */
- while (tp->request_r_scale < TCP_MAX_WINSHIFT &&
- (TCP_MAXWIN << tp->request_r_scale) < so->so_rcv.sb_hiwat)
- tp->request_r_scale++;
+ if (inp->inp_flowhash == 0)
+ inp->inp_flowhash = inp_calc_flowhash(inp);
+
+ tcp_set_max_rwinscale(tp, so);
soisconnecting(so);
tcpstat.tcps_connattempt++;
tp->t_state = TCPS_SYN_SENT;
- tp->t_timer[TCPT_KEEP] = tcp_keepinit;
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
+ tp->t_keepinit ? tp->t_keepinit : tcp_keepinit);
tp->iss = tcp_new_isn(tp);
tcp_sendseqinit(tp);
+ if (nstat_collect)
+ nstat_route_connect_attempt(inp->inp_route.ro_rt);
/*
* Generate a CC value for this connection and
struct inpcb *inp = tp->t_inpcb, *oinp;
struct socket *so = inp->inp_socket;
struct tcpcb *otp;
- struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)nam;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)nam;
struct in6_addr addr6;
struct rmxp_tao *taop;
struct rmxp_tao tao_noncached;
- int error;
+ int error = 0;
+ struct ifnet *outif = NULL;
if (inp->inp_lport == 0) {
error = in6_pcbbind(inp, (struct sockaddr *)0, p);
if (error)
- return error;
+ goto done;
}
/*
* Cannot simply call in_pcbconnect, because there might be an
* earlier incarnation of this same connection still in
* TIME_WAIT state, creating an ADDRINUSE error.
+ *
+ * in6_pcbladdr() might return an ifp with its reference held
+ * even in the error case, so make sure that it's released
+ * whenever it's non-NULL.
*/
- error = in6_pcbladdr(inp, nam, &addr6);
+ error = in6_pcbladdr(inp, nam, &addr6, &outif);
if (error)
- return error;
+ goto done;
tcp_unlock(inp->inp_socket, 0, 0);
oinp = in6_pcblookup_hash(inp->inp_pcbinfo,
&sin6->sin6_addr, sin6->sin6_port,
if (oinp) {
if (oinp != inp && (otp = intotcpcb(oinp)) != NULL &&
otp->t_state == TCPS_TIME_WAIT &&
- otp->t_starttime < tcp_msl &&
- (otp->t_flags & TF_RCVD_CC))
+ ((int)(tcp_now - otp->t_starttime)) < tcp_msl &&
+ (otp->t_flags & TF_RCVD_CC)) {
otp = tcp_close(otp);
- else
- return EADDRINUSE;
+ } else {
+ error = EADDRINUSE;
+ goto done;
+ }
}
if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->mtx)) {
/*lock inversion issue, mostly with udp multicast packets */
lck_rw_lock_exclusive(inp->inp_pcbinfo->mtx);
socket_lock(inp->inp_socket, 0);
}
- if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
+ if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
inp->in6p_laddr = addr6;
+ inp->in6p_last_outifp = outif; /* no reference needed */
+ }
inp->in6p_faddr = sin6->sin6_addr;
inp->inp_fport = sin6->sin6_port;
- if ((sin6->sin6_flowinfo & IPV6_FLOWINFO_MASK) != NULL)
+ if ((sin6->sin6_flowinfo & IPV6_FLOWINFO_MASK) != 0)
inp->in6p_flowinfo = sin6->sin6_flowinfo;
in_pcbrehash(inp);
lck_rw_done(inp->inp_pcbinfo->mtx);
- /* Compute window scaling to request. */
- while (tp->request_r_scale < TCP_MAX_WINSHIFT &&
- (TCP_MAXWIN << tp->request_r_scale) < so->so_rcv.sb_hiwat)
- tp->request_r_scale++;
+ if (inp->inp_flowhash == 0)
+ inp->inp_flowhash = inp_calc_flowhash(inp);
+
+ tcp_set_max_rwinscale(tp, so);
soisconnecting(so);
tcpstat.tcps_connattempt++;
tp->t_state = TCPS_SYN_SENT;
- tp->t_timer[TCPT_KEEP] = tcp_keepinit;
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
+ tp->t_keepinit ? tp->t_keepinit : tcp_keepinit);
tp->iss = tcp_new_isn(tp);
tcp_sendseqinit(tp);
+ if (nstat_collect)
+ nstat_route_connect_attempt(inp->inp_route.ro_rt);
/*
* Generate a CC value for this connection and
tp->t_flags |= TF_SENDCCNEW;
}
- return 0;
+done:
+ if (outif != NULL)
+ ifnet_release(outif);
+
+ return (error);
}
#endif /* INET6 */
+/*
+ * Export TCP internal state information via a struct tcp_info
+ */
+__private_extern__ void
+tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti)
+{
+ struct inpcb *inp = tp->t_inpcb;
+
+ bzero(ti, sizeof(*ti));
+
+ ti->tcpi_state = tp->t_state;
+
+ if (tp->t_state > TCPS_LISTEN) {
+ if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP))
+ ti->tcpi_options |= TCPI_OPT_TIMESTAMPS;
+ if (tp->t_flags & TF_SACK_PERMIT)
+ ti->tcpi_options |= TCPI_OPT_SACK;
+ if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) {
+ ti->tcpi_options |= TCPI_OPT_WSCALE;
+ ti->tcpi_snd_wscale = tp->snd_scale;
+ ti->tcpi_rcv_wscale = tp->rcv_scale;
+ }
+
+ /* Are we in retranmission episode */
+ if (tp->snd_max != tp->snd_nxt)
+ ti->tcpi_flags |= TCPI_FLAG_LOSSRECOVERY;
+ else
+ ti->tcpi_flags &= ~TCPI_FLAG_LOSSRECOVERY;
+
+ ti->tcpi_rto = tp->t_timer[TCPT_REXMT] ? tp->t_rxtcur : 0;
+ ti->tcpi_snd_mss = tp->t_maxseg;
+ ti->tcpi_rcv_mss = tp->t_maxseg;
+
+ ti->tcpi_rttcur = tp->t_rttcur;
+ ti->tcpi_srtt = tp->t_srtt >> TCP_RTT_SHIFT;
+ ti->tcpi_rttvar = tp->t_rttvar >> TCP_RTTVAR_SHIFT;
+
+ ti->tcpi_snd_ssthresh = tp->snd_ssthresh;
+ ti->tcpi_snd_cwnd = tp->snd_cwnd;
+ ti->tcpi_snd_sbbytes = tp->t_inpcb->inp_socket->so_snd.sb_cc;
+
+ ti->tcpi_rcv_space = tp->rcv_wnd;
+
+ ti->tcpi_snd_wnd = tp->snd_wnd;
+ ti->tcpi_snd_nxt = tp->snd_nxt;
+ ti->tcpi_rcv_nxt = tp->rcv_nxt;
+
+ /* convert bytes/msec to bits/sec */
+ if ((tp->t_flagsext & TF_MEASURESNDBW) != 0 &&
+ tp->t_bwmeas != NULL) {
+ ti->tcpi_snd_bw = (tp->t_bwmeas->bw_sndbw * 8000);
+ }
+
+ ti->tcpi_last_outif = (tp->t_inpcb->inp_last_outifp == NULL) ? 0 :
+ tp->t_inpcb->inp_last_outifp->if_index;
+
+ //atomic_get_64(ti->tcpi_txbytes, &inp->inp_stat->txbytes);
+ ti->tcpi_txbytes = inp->inp_stat->txbytes;
+ ti->tcpi_txretransmitbytes = tp->t_stat.txretransmitbytes;
+ ti->tcpi_txunacked = tp->snd_max - tp->snd_una;
+
+ //atomic_get_64(ti->tcpi_rxbytes, &inp->inp_stat->rxbytes);
+ ti->tcpi_rxbytes = inp->inp_stat->rxbytes;
+ ti->tcpi_rxduplicatebytes = tp->t_stat.rxduplicatebytes;
+ }
+}
+
+__private_extern__ errno_t
+tcp_fill_info_for_info_tuple(struct info_tuple *itpl, struct tcp_info *ti)
+{
+ struct inpcbinfo *pcbinfo = NULL;
+ struct inpcb *inp = NULL;
+ struct socket *so;
+ struct tcpcb *tp;
+
+ if (itpl->itpl_proto == IPPROTO_TCP)
+ pcbinfo = &tcbinfo;
+ else
+ return EINVAL;
+
+ if (itpl->itpl_local_sa.sa_family == AF_INET &&
+ itpl->itpl_remote_sa.sa_family == AF_INET) {
+ inp = in_pcblookup_hash(pcbinfo,
+ itpl->itpl_remote_sin.sin_addr,
+ itpl->itpl_remote_sin.sin_port,
+ itpl->itpl_local_sin.sin_addr,
+ itpl->itpl_local_sin.sin_port,
+ 0, NULL);
+ } else if (itpl->itpl_local_sa.sa_family == AF_INET6 &&
+ itpl->itpl_remote_sa.sa_family == AF_INET6) {
+ struct in6_addr ina6_local;
+ struct in6_addr ina6_remote;
+
+ ina6_local = itpl->itpl_local_sin6.sin6_addr;
+ if (IN6_IS_SCOPE_LINKLOCAL(&ina6_local) && itpl->itpl_local_sin6.sin6_scope_id)
+ ina6_local.s6_addr16[1] = htons(itpl->itpl_local_sin6.sin6_scope_id);
+
+ ina6_remote = itpl->itpl_remote_sin6.sin6_addr;
+ if (IN6_IS_SCOPE_LINKLOCAL(&ina6_remote) && itpl->itpl_remote_sin6.sin6_scope_id)
+ ina6_remote.s6_addr16[1] = htons(itpl->itpl_remote_sin6.sin6_scope_id);
+
+ inp = in6_pcblookup_hash(pcbinfo,
+ &ina6_remote,
+ itpl->itpl_remote_sin6.sin6_port,
+ &ina6_local,
+ itpl->itpl_local_sin6.sin6_port,
+ 0, NULL);
+ } else
+ return EINVAL;
+ if (inp == NULL || (so = inp->inp_socket) == NULL)
+ return ENOENT;
+
+ socket_lock(so, 0);
+ if (in_pcb_checkstate(inp, WNT_RELEASE, 1) == WNT_STOPUSING) {
+ socket_unlock(so, 0);
+ return ENOENT;
+ }
+ tp = intotcpcb(inp);
+
+ tcp_fill_info(tp, ti);
+ socket_unlock(so, 0);
+
+ return 0;
+}
+
+
+__private_extern__ int
+tcp_sysctl_info(__unused struct sysctl_oid *oidp, __unused void *arg1, __unused int arg2, struct sysctl_req *req)
+{
+ int error;
+ struct tcp_info ti;
+ struct info_tuple itpl;
+
+ if (req->newptr == USER_ADDR_NULL) {
+ return EINVAL;
+ }
+ if (req->newlen < sizeof(struct info_tuple)) {
+ return EINVAL;
+ }
+ error = SYSCTL_IN(req, &itpl, sizeof(struct info_tuple));
+ if (error != 0) {
+ return error;
+ }
+ error = tcp_fill_info_for_info_tuple(&itpl, &ti);
+ if (error != 0) {
+ return error;
+ }
+ error = SYSCTL_OUT(req, &ti, sizeof(struct tcp_info));
+ if (error != 0) {
+ return error;
+ }
+
+ return 0;
+}
+
+static int
+tcp_lookup_peer_pid_locked(struct socket *so, pid_t *out_pid)
+{
+ int error = EHOSTUNREACH;
+ *out_pid = -1;
+ if ((so->so_state & SS_ISCONNECTED) == 0) return ENOTCONN;
+
+ struct inpcb *inp = (struct inpcb*)so->so_pcb;
+ uint16_t lport = inp->inp_lport;
+ uint16_t fport = inp->inp_fport;
+ struct inpcb *finp = NULL;
+
+ if (inp->inp_vflag & INP_IPV6) {
+ struct in6_addr laddr6 = inp->in6p_laddr;
+ struct in6_addr faddr6 = inp->in6p_faddr;
+ socket_unlock(so, 0);
+ finp = in6_pcblookup_hash(&tcbinfo, &laddr6, lport, &faddr6, fport, 0, NULL);
+ socket_lock(so, 0);
+ } else if (inp->inp_vflag & INP_IPV4) {
+ struct in_addr laddr4 = inp->inp_laddr;
+ struct in_addr faddr4 = inp->inp_faddr;
+ socket_unlock(so, 0);
+ finp = in_pcblookup_hash(&tcbinfo, laddr4, lport, faddr4, fport, 0, NULL);
+ socket_lock(so, 0);
+ }
+
+ if (finp) {
+ *out_pid = finp->inp_socket->last_pid;
+ error = 0;
+ in_pcb_checkstate(finp, WNT_RELEASE, 0);
+ }
+
+ return error;
+}
+
/*
* The new sockopt interface makes it possible for us to block in the
* copyin/out step (if we take a page fault). Taking a page fault at
if (inp == NULL) {
return (ECONNRESET);
}
- if (sopt->sopt_level != IPPROTO_TCP) {
+ /* Allow <SOL_SOCKET,SO_FLUSH> at this level */
+ if (sopt->sopt_level != IPPROTO_TCP &&
+ !(sopt->sopt_level == SOL_SOCKET && sopt->sopt_name == SO_FLUSH)) {
#if INET6
if (INP_CHECK_SOCKAF(so, AF_INET6))
error = ip6_ctloutput(so, sopt);
return (ECONNRESET);
}
+ calculate_tcp_clock();
+
switch (sopt->sopt_dir) {
case SOPT_SET:
switch (sopt->sopt_name) {
else
tp->t_flags &= ~opt;
break;
+ case TCP_RXT_FINDROP:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error)
+ break;
+ opt = TF_RXTFINDROP;
+ if (optval)
+ tp->t_flagsext |= opt;
+ else
+ tp->t_flagsext &= ~opt;
+ break;
+ case TCP_MEASURE_SND_BW:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error)
+ break;
+ opt = TF_MEASURESNDBW;
+ if (optval) {
+ if (tp->t_bwmeas == NULL) {
+ tp->t_bwmeas = tcp_bwmeas_alloc(tp);
+ if (tp->t_bwmeas == NULL) {
+ error = ENOMEM;
+ break;
+ }
+ }
+ tp->t_flagsext |= opt;
+ } else {
+ tp->t_flagsext &= ~opt;
+ /* Reset snd bw measurement state */
+ tp->t_flagsext &= ~(TF_BWMEAS_INPROGRESS);
+ if (tp->t_bwmeas != NULL) {
+ tcp_bwmeas_free(tp);
+ }
+ }
+ break;
+ case TCP_MEASURE_BW_BURST: {
+ struct tcp_measure_bw_burst in;
+ uint32_t minpkts, maxpkts;
+ bzero(&in, sizeof(in));
+ error = sooptcopyin(sopt, &in, sizeof(in),
+ sizeof(in));
+ if (error)
+ break;
+ if ((tp->t_flagsext & TF_MEASURESNDBW) == 0 ||
+ tp->t_bwmeas == NULL) {
+ error = EINVAL;
+ break;
+ }
+ minpkts = (in.min_burst_size != 0) ? in.min_burst_size :
+ tp->t_bwmeas->bw_minsizepkts;
+ maxpkts = (in.max_burst_size != 0) ? in.max_burst_size :
+ tp->t_bwmeas->bw_maxsizepkts;
+ if (minpkts > maxpkts) {
+ error = EINVAL;
+ break;
+ }
+ tp->t_bwmeas->bw_minsizepkts = minpkts;
+ tp->t_bwmeas->bw_maxsizepkts = maxpkts;
+ tp->t_bwmeas->bw_minsize = (minpkts * tp->t_maxseg);
+ tp->t_bwmeas->bw_maxsize = (maxpkts * tp->t_maxseg);
+ break;
+ }
case TCP_MAXSEG:
error = sooptcopyin(sopt, &optval, sizeof optval,
sizeof optval);
error = EINVAL;
break;
- case TCP_KEEPALIVE:
- error = sooptcopyin(sopt, &optval, sizeof optval,
- sizeof optval);
- if (error)
- break;
- if (optval < 0)
- error = EINVAL;
- else
- tp->t_keepidle = optval * PR_SLOWHZ;
+ case TCP_KEEPALIVE:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error)
+ break;
+ if (optval < 0)
+ error = EINVAL;
+ else {
+ tp->t_keepidle = optval * TCP_RETRANSHZ;
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
+ TCP_KEEPIDLE(tp)); /* reset the timer to new value */
+ tcp_check_timer_state(tp);
+ }
break;
-
+
+ case TCP_CONNECTIONTIMEOUT:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error)
+ break;
+ if (optval < 0)
+ error = EINVAL;
+ else
+ tp->t_keepinit = optval * TCP_RETRANSHZ;
+ break;
+
+ case PERSIST_TIMEOUT:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error)
+ break;
+ if (optval < 0)
+ error = EINVAL;
+ else
+ tp->t_persist_timeout = optval * TCP_RETRANSHZ;
+ break;
+ case TCP_RXT_CONNDROPTIME:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error)
+ break;
+ if (optval < 0)
+ error = EINVAL;
+ else
+ tp->rxt_conndroptime = optval * TCP_RETRANSHZ;
+ break;
+ case TCP_NOTSENT_LOWAT:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error)
+ break;
+ if (optval < 0) {
+ error = EINVAL;
+ break;
+ } else {
+ if (optval == 0) {
+ so->so_flags &= ~(SOF_NOTSENT_LOWAT);
+ tp->t_notsent_lowat = 0;
+ } else {
+ so->so_flags |= SOF_NOTSENT_LOWAT;
+ tp->t_notsent_lowat = optval;
+ }
+ }
+ break;
+
+ case SO_FLUSH:
+ if ((error = sooptcopyin(sopt, &optval, sizeof (optval),
+ sizeof (optval))) != 0)
+ break;
+
+ error = inp_flush(inp, optval);
+ break;
+
default:
error = ENOPROTOOPT;
break;
optval = tp->t_maxseg;
break;
case TCP_KEEPALIVE:
- optval = tp->t_keepidle / PR_SLOWHZ;
+ optval = tp->t_keepidle / TCP_RETRANSHZ;
break;
case TCP_NOOPT:
optval = tp->t_flags & TF_NOOPT;
case TCP_NOPUSH:
optval = tp->t_flags & TF_NOPUSH;
break;
+ case TCP_CONNECTIONTIMEOUT:
+ optval = tp->t_keepinit / TCP_RETRANSHZ;
+ break;
+ case PERSIST_TIMEOUT:
+ optval = tp->t_persist_timeout / TCP_RETRANSHZ;
+ break;
+ case TCP_RXT_CONNDROPTIME:
+ optval = tp->rxt_conndroptime / TCP_RETRANSHZ;
+ break;
+ case TCP_RXT_FINDROP:
+ optval = tp->t_flagsext & TF_RXTFINDROP;
+ break;
+ case TCP_MEASURE_SND_BW:
+ optval = tp->t_flagsext & TF_MEASURESNDBW;
+ break;
+ case TCP_INFO: {
+ struct tcp_info ti;
+
+ tcp_fill_info(tp, &ti);
+ error = sooptcopyout(sopt, &ti, sizeof(struct tcp_info));
+ goto done;
+ /* NOT REACHED */
+ }
+ case TCP_MEASURE_BW_BURST: {
+ struct tcp_measure_bw_burst out;
+ if ((tp->t_flagsext & TF_MEASURESNDBW) == 0 ||
+ tp->t_bwmeas == NULL) {
+ error = EINVAL;
+ break;
+ }
+ out.min_burst_size = tp->t_bwmeas->bw_minsizepkts;
+ out.max_burst_size = tp->t_bwmeas->bw_maxsizepkts;
+ error = sooptcopyout(sopt, &out, sizeof(out));
+ goto done;
+ }
+ case TCP_NOTSENT_LOWAT:
+ if ((so->so_flags & SOF_NOTSENT_LOWAT) != 0) {
+ optval = tp->t_notsent_lowat;
+ } else {
+ optval = 0;
+ }
+ break;
+ case TCP_PEER_PID: {
+ pid_t pid;
+ error = tcp_lookup_peer_pid_locked(so, &pid);
+ if (error == 0)
+ error = sooptcopyout(sopt, &pid, sizeof(pid));
+ goto done;
+ }
default:
error = ENOPROTOOPT;
break;
error = sooptcopyout(sopt, &optval, sizeof optval);
break;
}
+done:
return (error);
}
* sizes, respectively. These are obsolescent (this information should
* be set by the route).
*/
-u_long tcp_sendspace = 1024*16;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace, CTLFLAG_RW,
- &tcp_sendspace , 0, "Maximum outgoing TCP datagram size");
-u_long tcp_recvspace = 1024*16;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
- &tcp_recvspace , 0, "Maximum incoming TCP datagram size");
-
-__private_extern__ int tcp_sockthreshold = 256;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, sockthreshold, CTLFLAG_RW,
- &tcp_sockthreshold , 0, "TCP Socket size increased if less than threshold");
-
-#define TCP_INCREASED_SPACE 65535 /* Automatically increase tcp send/rcv space to this value */
+u_int32_t tcp_sendspace = 1448*256;
+u_int32_t tcp_recvspace = 1448*384;
+
+/* During attach, the size of socket buffer allocated is limited to
+ * sb_max in sbreserve. Disallow setting the tcp send and recv space
+ * to be more than sb_max because that will cause tcp_attach to fail
+ * (see radar 5713060)
+ */
+static int
+sysctl_tcp_sospace(struct sysctl_oid *oidp, __unused void *arg1,
+ __unused int arg2, struct sysctl_req *req) {
+ u_int32_t new_value = 0, *space_p = NULL;
+ int changed = 0, error = 0;
+ u_quad_t sb_effective_max = (sb_max / (MSIZE+MCLBYTES)) * MCLBYTES;
+
+ switch (oidp->oid_number) {
+ case TCPCTL_SENDSPACE:
+ space_p = &tcp_sendspace;
+ break;
+ case TCPCTL_RECVSPACE:
+ space_p = &tcp_recvspace;
+ break;
+ default:
+ return EINVAL;
+ }
+ error = sysctl_io_number(req, *space_p, sizeof(u_int32_t),
+ &new_value, &changed);
+ if (changed) {
+ if (new_value > 0 && new_value <= sb_effective_max) {
+ *space_p = new_value;
+ } else {
+ error = ERANGE;
+ }
+ }
+ return error;
+}
+
+SYSCTL_PROC(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_sendspace , 0, &sysctl_tcp_sospace, "IU", "Maximum outgoing TCP datagram size");
+SYSCTL_PROC(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED,
+ &tcp_recvspace , 0, &sysctl_tcp_sospace, "IU", "Maximum incoming TCP datagram size");
+
+
/*
* Attach TCP protocol to socket, allocating
* internet protocol control block, tcp control block,
* bufer space, and entering LISTEN state if to accept connections.
+ *
+ * Returns: 0 Success
+ * in_pcballoc:ENOBUFS
+ * in_pcballoc:ENOMEM
+ * in_pcballoc:??? [IPSEC specific]
+ * soreserve:ENOBUFS
*/
static int
tcp_attach(so, p)
struct inpcb *inp;
int error;
#if INET6
- int isipv6 = INP_CHECK_SOCKAF(so, AF_INET6) != NULL;
+ int isipv6 = INP_CHECK_SOCKAF(so, AF_INET6) != 0;
#endif
error = in_pcballoc(so, &tcbinfo, p);
inp = sotoinpcb(so);
if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
- /*
- * The goal is to let clients have large send/rcv default windows (TCP_INCREASED_SPACE)
- * while not hogging mbuf space for servers. This is done by watching a threshold
- * of tcpcbs in use and bumping the default send and rcvspace only if under that threshold.
- * The theory being that busy servers have a lot more active tcpcbs and don't want the potential
- * memory penalty of having much larger sockbuffs. The sysctl allows to fine tune that threshold value. */
-
- if (inp->inp_pcbinfo->ipi_count < tcp_sockthreshold)
- error = soreserve(so, MAX(TCP_INCREASED_SPACE, tcp_sendspace), MAX(TCP_INCREASED_SPACE,tcp_recvspace));
- else
- error = soreserve(so, tcp_sendspace, tcp_recvspace);
+ error = soreserve(so, tcp_sendspace, tcp_recvspace);
if (error)
return (error);
}
+ if ((so->so_rcv.sb_flags & SB_USRSIZE) == 0)
+ so->so_rcv.sb_flags |= SB_AUTOSIZE;
+ if ((so->so_snd.sb_flags & SB_USRSIZE) == 0)
+ so->so_snd.sb_flags |= SB_AUTOSIZE;
#if INET6
if (isipv6) {
so->so_state |= nofd;
return (ENOBUFS);
}
+ if (nstat_collect) {
+ nstat_tcp_new_pcb(inp);
+ }
tp->t_state = TCPS_CLOSED;
return (0);
}
soisdisconnected(tp->t_inpcb->inp_socket);
/* To prevent the connection hanging in FIN_WAIT_2 forever. */
if (tp->t_state == TCPS_FIN_WAIT_2)
- tp->t_timer[TCPT_2MSL] = tcp_maxidle;
+ tp->t_timer[TCPT_2MSL] = OFFSET_FROM_START(tp, tcp_maxidle);
}
return (tp);
}
+void
+tcp_in_cksum_stats(u_int32_t len)
+{
+ tcps_in_sw_cksum++;
+ tcps_in_sw_cksum_bytes += len;
+}
+
+void
+tcp_out_cksum_stats(u_int32_t len)
+{
+ tcps_out_sw_cksum++;
+ tcps_out_sw_cksum_bytes += len;
+}
projects / apple / xnu.git / blobdiff