/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2000-2019 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1988, 1993
* SUCH DAMAGE.
*
* From: @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94
+ * $FreeBSD: src/sys/netinet/tcp_usrreq.c,v 1.51.2.9 2001/08/22 00:59:12 silby Exp $
*/
-#if ISFB31
-#include "opt_tcpdebug.h"
-#endif
#include <sys/param.h>
#include <sys/systm.h>
#if INET6
#include <sys/domain.h>
#endif /* INET6 */
+#if !CONFIG_EMBEDDED
+#include <sys/kasl.h>
+#endif
+#include <sys/priv.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
+#include <sys/syslog.h>
#include <net/if.h>
#include <net/route.h>
+#include <net/ntstat.h>
+#include <net/content_filter.h>
+#include <net/multi_layer_pkt_log.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
-#include <netinet/ip.h>
+#if INET6
+#include <netinet/ip6.h>
+#endif
#include <netinet/in_pcb.h>
+#if INET6
+#include <netinet6/in6_pcb.h>
+#endif
#include <netinet/in_var.h>
#include <netinet/ip_var.h>
#if INET6
-#include <netinet/ip6.h>
-#include <netinet6/ip6_var.h>
-#include <netinet6/in6_pcb.h>
#include <netinet6/ip6_var.h>
#endif
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/tcpip.h>
+#include <netinet/tcp_cc.h>
+#include <netinet/tcp_log.h>
+#include <mach/sdt.h>
#if TCPDEBUG
#include <netinet/tcp_debug.h>
#endif
+#if MPTCP
+#include <netinet/mptcp_var.h>
+#endif /* MPTCP */
#if IPSEC
#include <netinet6/ipsec.h>
#endif /*IPSEC*/
+#if FLOW_DIVERT
+#include <netinet/flow_divert.h>
+#endif /* FLOW_DIVERT */
+
+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 *);
+static void tcp_connection_fill_info(struct tcpcb *tp,
+ struct tcp_connection_info *tci);
+static int tcp_get_mpkl_send_info(struct mbuf *, struct so_mpkl_send_info *);
+
/*
* TCP protocol interface to socket abstraction.
*/
-extern char *tcpstates[]; /* XXX ??? */
-
-static int tcp_attach __P((struct socket *, struct proc *));
-static int tcp_connect __P((struct tcpcb *, struct sockaddr *,
- struct proc *));
+static int tcp_attach(struct socket *, struct proc *);
+static int tcp_connect(struct tcpcb *, struct sockaddr *, struct proc *);
#if INET6
-static int tcp6_connect __P((struct tcpcb *, struct sockaddr *,
- struct proc *));
+static int tcp6_connect(struct tcpcb *, struct sockaddr *, struct proc *);
+static int tcp6_usr_connect(struct socket *, struct sockaddr *,
+ struct proc *);
#endif /* INET6 */
-static struct tcpcb * tcp_disconnect __P((struct tcpcb *));
-static struct tcpcb *
- tcp_usrclosed __P((struct tcpcb *));
+static struct tcpcb *tcp_disconnect(struct tcpcb *);
+static struct tcpcb *tcp_usrclosed(struct tcpcb *);
+extern void tcp_sbrcv_trim(struct tcpcb *tp, struct sockbuf *sb);
#if TCPDEBUG
-#define TCPDEBUG0 int ostate
-#define TCPDEBUG1() ostate = tp ? tp->t_state : 0
-#define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \
- tcp_trace(TA_USER, ostate, tp, 0, req)
+#define TCPDEBUG0 int ostate = 0
+#define TCPDEBUG1() ostate = tp ? tp->t_state : 0
+#define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \
+ tcp_trace(TA_USER, ostate, tp, 0, 0, req)
#else
-#define TCPDEBUG0
-#define TCPDEBUG1()
-#define TCPDEBUG2(req)
+#define TCPDEBUG0
+#define TCPDEBUG1()
+#define TCPDEBUG2(req)
#endif
+SYSCTL_PROC(_net_inet_tcp, OID_AUTO, info,
+ CTLFLAG_RW | CTLFLAG_LOCKED | CTLFLAG_ANYBODY | CTLFLAG_KERN,
+ 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 s = splnet();
int error;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = 0;
}
error = tcp_attach(so, p);
- if (error)
+ if (error) {
goto out;
+ }
- if ((so->so_options & SO_LINGER) && so->so_linger == 0)
+ if ((so->so_options & SO_LINGER) && so->so_linger == 0) {
so->so_linger = TCP_LINGERTIME * hz;
+ }
tp = sototcpcb(so);
out:
TCPDEBUG2(PRU_ATTACH);
- splx(s);
return error;
}
static int
tcp_usr_detach(struct socket *so)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
TCPDEBUG0;
- if (inp == 0) {
- splx(s);
- return EINVAL; /* XXX */
+ if (inp == 0 || (inp->inp_state == INPCB_STATE_DEAD)) {
+ return EINVAL; /* XXX */
}
+ socket_lock_assert_owned(so);
tp = intotcpcb(inp);
/* In case we got disconnected from the peer */
- if (tp == 0)
- goto out;
+ if (tp == NULL) {
+ goto out;
+ }
TCPDEBUG1();
+
+ calculate_tcp_clock();
+
tp = tcp_disconnect(tp);
out:
TCPDEBUG2(PRU_DETACH);
- splx(s);
return error;
}
-#define COMMON_START() TCPDEBUG0; \
- do { \
- if (inp == 0) { \
- splx(s); \
- return EINVAL; \
- } \
- tp = intotcpcb(inp); \
- TCPDEBUG1(); \
- } while(0)
-
-#define COMMON_END(req) out: TCPDEBUG2(req); splx(s); return error; goto out
+#if NECP
+#define COMMON_START() TCPDEBUG0; \
+do { \
+ if (inp == NULL || inp->inp_state == INPCB_STATE_DEAD) \
+ return (EINVAL); \
+ if (necp_socket_should_use_flow_divert(inp)) \
+ return (EPROTOTYPE); \
+ tp = intotcpcb(inp); \
+ TCPDEBUG1(); \
+ calculate_tcp_clock(); \
+} while (0)
+#else /* NECP */
+#define COMMON_START() TCPDEBUG0; \
+do { \
+ if (inp == NULL || inp->inp_state == INPCB_STATE_DEAD) \
+ return (EINVAL); \
+ tp = intotcpcb(inp); \
+ TCPDEBUG1(); \
+ calculate_tcp_clock(); \
+} while (0)
+#endif /* !NECP */
+
+#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)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
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;
goto out;
}
error = in_pcbbind(inp, nam, p);
- if (error)
+ if (error) {
goto out;
- COMMON_END(PRU_BIND);
+ }
+
+#if NECP
+ /* Update NECP client with bind result if not in middle of connect */
+ if ((inp->inp_flags2 & INP2_CONNECT_IN_PROGRESS) &&
+ !uuid_is_null(inp->necp_client_uuid)) {
+ socket_unlock(so, 0);
+ necp_client_assign_from_socket(so->last_pid, inp->necp_client_uuid, inp);
+ socket_lock(so, 0);
+ }
+#endif /* NECP */
+ COMMON_END(PRU_BIND);
}
#if INET6
static int
tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct proc *p)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
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;
}
inp->inp_vflag &= ~INP_IPV4;
inp->inp_vflag |= INP_IPV6;
- if (ip6_mapped_addr_on && (inp->inp_flags & IN6P_BINDV6ONLY) == NULL) {
-
- if (IN6_IS_ADDR_UNSPECIFIED(&sin6p->sin6_addr))
+ if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
+ if (IN6_IS_ADDR_UNSPECIFIED(&sin6p->sin6_addr)) {
inp->inp_vflag |= INP_IPV4;
- else if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
+ } else if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
struct sockaddr_in sin;
in6_sin6_2_sin(&sin, sin6p);
}
}
error = in6_pcbbind(inp, nam, p);
+ if (error) {
+ goto out;
+ }
COMMON_END(PRU_BIND);
}
#endif /* INET6 */
/*
* 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)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
COMMON_START();
- if (inp->inp_lport == 0)
- error = in_pcbbind(inp, (struct sockaddr *)0, p);
- if (error == 0)
+ if (inp->inp_lport == 0) {
+ error = in_pcbbind(inp, NULL, p);
+ }
+ if (error == 0) {
tp->t_state = TCPS_LISTEN;
+ }
+ TCP_LOG_LISTEN(tp, error);
COMMON_END(PRU_LISTEN);
}
static int
tcp6_usr_listen(struct socket *so, struct proc *p)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
COMMON_START();
if (inp->inp_lport == 0) {
inp->inp_vflag &= ~INP_IPV4;
- if (ip6_mapped_addr_on &&
- (inp->inp_flags & IN6P_BINDV6ONLY) == NULL)
+ if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) {
inp->inp_vflag |= INP_IPV4;
- error = in6_pcbbind(inp, (struct sockaddr *)0, p);
+ }
+ error = in6_pcbbind(inp, NULL, p);
}
- if (error == 0)
+ if (error == 0) {
tp->t_state = TCPS_LISTEN;
+ }
+ TCP_LOG_LISTEN(tp, error);
COMMON_END(PRU_LISTEN);
}
#endif /* INET6 */
+static int
+tcp_connect_complete(struct socket *so)
+{
+ struct tcpcb *tp = sototcpcb(so);
+ struct inpcb *inp = sotoinpcb(so);
+ int error = 0;
+
+ /* TFO delays the tcp_output until later, when the app calls write() */
+ if (so->so_flags1 & SOF1_PRECONNECT_DATA) {
+ if (!necp_socket_is_allowed_to_send_recv(sotoinpcb(so), NULL, NULL, NULL, NULL)) {
+ TCP_LOG_DROP_NECP(NULL, NULL, tp, true);
+ return EHOSTUNREACH;
+ }
+
+ /* Initialize enough state so that we can actually send data */
+ tcp_mss(tp, -1, IFSCOPE_NONE);
+ tp->snd_wnd = tp->t_maxseg;
+ tp->max_sndwnd = tp->snd_wnd;
+ } else {
+ error = tcp_output(tp);
+ }
+
+#if NECP
+ /* Update NECP client with connected five-tuple */
+ if (error == 0 && !uuid_is_null(inp->necp_client_uuid)) {
+ socket_unlock(so, 0);
+ necp_client_assign_from_socket(so->last_pid, inp->necp_client_uuid, inp);
+ socket_lock(so, 0);
+ }
+#endif /* NECP */
+
+ return error;
+}
+
/*
* Initiate connection to peer.
* Create a template for use in transmissions on this connection.
static int
tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
struct sockaddr_in *sinp;
- COMMON_START();
+ TCPDEBUG0;
+ if (inp == NULL) {
+ 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;
+ }
+ }
+#if NECP
+#if CONTENT_FILTER
+ error = cfil_sock_attach(so, NULL, nam, CFS_CONNECTION_DIR_OUT);
+ if (error != 0) {
+ return error;
+ }
+#endif /* CONTENT_FILTER */
+#if FLOW_DIVERT
+ if (necp_socket_should_use_flow_divert(inp)) {
+ uint32_t fd_ctl_unit = necp_socket_get_flow_divert_control_unit(inp);
+ if (fd_ctl_unit > 0) {
+ error = flow_divert_pcb_init(so, fd_ctl_unit);
+ if (error == 0) {
+ error = flow_divert_connect_out(so, nam, p);
+ }
+ } else {
+ error = ENETDOWN;
+ }
+
+ return error;
+ }
+#endif /* FLOW_DIVERT */
+#endif /* NECP */
+ 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;
}
- if ((error = tcp_connect(tp, nam, p)) != 0)
+ if ((error = tcp_connect(tp, nam, p)) != 0) {
+ TCP_LOG_CONNECT(tp, true, error);
goto out;
- error = tcp_output(tp);
+ }
+
+ error = tcp_connect_complete(so);
+
+ TCP_LOG_CONNECT(tp, true, error);
+
COMMON_END(PRU_CONNECT);
}
+static int
+tcp_usr_connectx_common(struct socket *so, int af,
+ struct sockaddr *src, struct sockaddr *dst,
+ struct proc *p, uint32_t ifscope, sae_associd_t aid, sae_connid_t *pcid,
+ uint32_t flags, void *arg, uint32_t arglen, struct uio *auio,
+ user_ssize_t *bytes_written)
+{
+#pragma unused(aid, flags, arg, arglen)
+ struct inpcb *inp = sotoinpcb(so);
+ int error = 0;
+ user_ssize_t datalen = 0;
+
+ if (inp == NULL) {
+ return EINVAL;
+ }
+
+ VERIFY(dst != NULL);
+
+ ASSERT(!(inp->inp_flags2 & INP2_CONNECT_IN_PROGRESS));
+ inp->inp_flags2 |= INP2_CONNECT_IN_PROGRESS;
+
+#if NECP
+ inp_update_necp_policy(inp, src, dst, ifscope);
+#endif /* NECP */
+
+ if ((so->so_flags1 & SOF1_DATA_IDEMPOTENT) &&
+ (tcp_fastopen & TCP_FASTOPEN_CLIENT)) {
+ sototcpcb(so)->t_flagsext |= TF_FASTOPEN;
+ }
+
+ /* bind socket to the specified interface, if requested */
+ if (ifscope != IFSCOPE_NONE &&
+ (error = inp_bindif(inp, ifscope, NULL)) != 0) {
+ goto done;
+ }
+
+ /* if source address and/or port is specified, bind to it */
+ if (src != NULL) {
+ error = sobindlock(so, src, 0); /* already locked */
+ if (error != 0) {
+ goto done;
+ }
+ }
+
+ switch (af) {
+ case AF_INET:
+ error = tcp_usr_connect(so, dst, p);
+ break;
+#if INET6
+ case AF_INET6:
+ error = tcp6_usr_connect(so, dst, p);
+ break;
+#endif /* INET6 */
+ default:
+ VERIFY(0);
+ /* NOTREACHED */
+ }
+
+ if (error != 0) {
+ goto done;
+ }
+
+ /* if there is data, copy it */
+ if (auio != NULL) {
+ socket_unlock(so, 0);
+
+ VERIFY(bytes_written != NULL);
+
+ datalen = uio_resid(auio);
+ error = so->so_proto->pr_usrreqs->pru_sosend(so, NULL,
+ (uio_t)auio, NULL, NULL, 0);
+ socket_lock(so, 0);
+
+ if (error == 0 || error == EWOULDBLOCK) {
+ *bytes_written = datalen - uio_resid(auio);
+ }
+
+ /*
+ * sosend returns EWOULDBLOCK if it's a non-blocking
+ * socket or a timeout occured (this allows to return
+ * the amount of queued data through sendit()).
+ *
+ * However, connectx() returns EINPROGRESS in case of a
+ * blocking socket. So we change the return value here.
+ */
+ if (error == EWOULDBLOCK) {
+ error = EINPROGRESS;
+ }
+ }
+
+ if (error == 0 && pcid != NULL) {
+ *pcid = 1; /* there is only one connection in regular TCP */
+ }
+done:
+ if (error && error != EINPROGRESS) {
+ so->so_flags1 &= ~SOF1_PRECONNECT_DATA;
+ }
+
+ inp->inp_flags2 &= ~INP2_CONNECT_IN_PROGRESS;
+ return error;
+}
+
+static int
+tcp_usr_connectx(struct socket *so, struct sockaddr *src,
+ struct sockaddr *dst, struct proc *p, uint32_t ifscope,
+ sae_associd_t aid, sae_connid_t *pcid, uint32_t flags, void *arg,
+ uint32_t arglen, struct uio *uio, user_ssize_t *bytes_written)
+{
+ return tcp_usr_connectx_common(so, AF_INET, src, dst, p, ifscope, aid,
+ pcid, flags, arg, arglen, uio, bytes_written);
+}
+
#if INET6
static int
tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct proc *p)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
struct sockaddr_in6 *sin6p;
- COMMON_START();
+ TCPDEBUG0;
+ if (inp == NULL) {
+ 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;
+ }
+ }
+#if NECP
+#if CONTENT_FILTER
+ error = cfil_sock_attach(so, NULL, nam, CFS_CONNECTION_DIR_OUT);
+ if (error != 0) {
+ return error;
+ }
+#endif /* CONTENT_FILTER */
+#if FLOW_DIVERT
+ if (necp_socket_should_use_flow_divert(inp)) {
+ uint32_t fd_ctl_unit = necp_socket_get_flow_divert_control_unit(inp);
+ if (fd_ctl_unit > 0) {
+ error = flow_divert_pcb_init(so, fd_ctl_unit);
+ if (error == 0) {
+ error = flow_divert_connect_out(so, nam, p);
+ }
+ } else {
+ error = ENETDOWN;
+ }
+
+ return error;
+ }
+#endif /* FLOW_DIVERT */
+#endif /* NECP */
+
+ tp = intotcpcb(inp);
+ TCPDEBUG1();
+
+ calculate_tcp_clock();
+
+ 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;
goto out;
}
- inp->inp_vflag &= ~INP_IPV4;
- inp->inp_vflag |= INP_IPV6;
- if (ip6_mapped_addr_on &&
- IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
+
+ if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) {
struct sockaddr_in sin;
+ if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) {
+ return EINVAL;
+ }
+
in6_sin6_2_sin(&sin, sin6p);
inp->inp_vflag |= INP_IPV4;
inp->inp_vflag &= ~INP_IPV6;
- if ((error = tcp_connect(tp, (struct sockaddr *)&sin, p)) != 0)
+ if ((error = tcp_connect(tp, (struct sockaddr *)&sin, p)) != 0) {
+ TCP_LOG_CONNECT(tp, true, error);
goto out;
- error = tcp_output(tp);
+ }
+
+ error = tcp_connect_complete(so);
goto out;
}
- if ((error = tcp6_connect(tp, nam, p)) != 0)
- goto out;
- error = tcp_output(tp);
- if (error)
+ inp->inp_vflag &= ~INP_IPV4;
+ inp->inp_vflag |= INP_IPV6;
+ if ((error = tcp6_connect(tp, nam, p)) != 0) {
+ TCP_LOG_CONNECT(tp, true, error);
goto out;
- if (ip6_mapped_addr_on)
- inp->inp_vflag |= INP_IPV6;
+ }
+
+ error = tcp_connect_complete(so);
+
+ TCP_LOG_CONNECT(tp, true, error);
+
COMMON_END(PRU_CONNECT);
}
+
+static int
+tcp6_usr_connectx(struct socket *so, struct sockaddr*src,
+ struct sockaddr *dst, struct proc *p, uint32_t ifscope,
+ sae_associd_t aid, sae_connid_t *pcid, uint32_t flags, void *arg,
+ uint32_t arglen, struct uio *uio, user_ssize_t *bytes_written)
+{
+ return tcp_usr_connectx_common(so, AF_INET6, src, dst, p, ifscope, aid,
+ pcid, flags, arg, arglen, uio, bytes_written);
+}
#endif /* INET6 */
/*
static int
tcp_usr_disconnect(struct socket *so)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
+ socket_lock_assert_owned(so);
COMMON_START();
- /* In case we got disconnected from the peer */
- if (tp == 0)
- goto out;
+ /* In case we got disconnected from the peer */
+ if (tp == NULL) {
+ goto out;
+ }
tp = tcp_disconnect(tp);
COMMON_END(PRU_DISCONNECT);
}
+/*
+ * User-protocol pru_disconnectx callback.
+ */
+static int
+tcp_usr_disconnectx(struct socket *so, sae_associd_t aid, sae_connid_t cid)
+{
+#pragma unused(cid)
+ if (aid != SAE_ASSOCID_ANY && aid != SAE_ASSOCID_ALL) {
+ return EINVAL;
+ }
+
+ return tcp_usr_disconnect(so);
+}
+
/*
* Accept a connection. Essentially all the work is
* done at higher levels; just return the address
static int
tcp_usr_accept(struct socket *so, struct sockaddr **nam)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
- struct tcpcb *tp;
+ struct tcpcb *tp = NULL;
+ TCPDEBUG0;
+
+ in_getpeeraddr(so, nam);
+
+ if (so->so_state & SS_ISDISCONNECTED) {
+ error = ECONNABORTED;
+ goto out;
+ }
+ if (inp == NULL || inp->inp_state == INPCB_STATE_DEAD) {
+ return EINVAL;
+ }
+#if NECP
+ else if (necp_socket_should_use_flow_divert(inp)) {
+ return EPROTOTYPE;
+ }
+
+#endif /* NECP */
+
+ tp = intotcpcb(inp);
+ TCPDEBUG1();
+
+ TCP_LOG_ACCEPT(tp, 0);
+
+ calculate_tcp_clock();
- COMMON_START();
- in_setpeeraddr(so, nam);
COMMON_END(PRU_ACCEPT);
}
static int
tcp6_usr_accept(struct socket *so, struct sockaddr **nam)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
- struct tcpcb *tp;
+ struct tcpcb *tp = NULL;
+ TCPDEBUG0;
+
+ if (so->so_state & SS_ISDISCONNECTED) {
+ error = ECONNABORTED;
+ goto out;
+ }
+ if (inp == NULL || inp->inp_state == INPCB_STATE_DEAD) {
+ return EINVAL;
+ }
+#if NECP
+ else if (necp_socket_should_use_flow_divert(inp)) {
+ return EPROTOTYPE;
+ }
+
+#endif /* NECP */
+
+ tp = intotcpcb(inp);
+ TCPDEBUG1();
+
+ TCP_LOG_ACCEPT(tp, 0);
+
+ calculate_tcp_clock();
- COMMON_START();
in6_mapped_peeraddr(so, nam);
COMMON_END(PRU_ACCEPT);
}
/*
* 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)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
- COMMON_START();
+ TCPDEBUG0;
+ if (inp == NULL || inp->inp_state == INPCB_STATE_DEAD) {
+ return EINVAL;
+ }
+
socantsendmore(so);
- /* In case we got disconnected from the peer */
- if (tp == 0)
- goto out;
+
+ /*
+ * In case we got disconnected from the peer, or if this is
+ * a socket that is to be flow-diverted (but not yet).
+ */
+ tp = intotcpcb(inp);
+ TCPDEBUG1();
+
+ if (tp == NULL
+#if NECP
+ || (necp_socket_should_use_flow_divert(inp))
+#endif /* NECP */
+ ) {
+ if (tp != NULL) {
+ error = EPROTOTYPE;
+ }
+ goto out;
+ }
+
+ calculate_tcp_clock();
+
tp = tcp_usrclosed(tp);
- if (tp)
+#if MPTCP
+ /* A reset has been sent but socket exists, do not send FIN */
+ if ((so->so_flags & SOF_MP_SUBFLOW) &&
+ (tp) && (tp->t_mpflags & TMPF_RESET)) {
+ goto out;
+ }
+#endif
+#if CONTENT_FILTER
+ /* Don't send a FIN yet */
+ if (tp && !(so->so_state & SS_ISDISCONNECTED) &&
+ cfil_sock_data_pending(&so->so_snd)) {
+ goto out;
+ }
+#endif /* CONTENT_FILTER */
+ if (tp) {
error = tcp_output(tp);
+ }
COMMON_END(PRU_SHUTDOWN);
}
* 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 s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
COMMON_START();
- /* In case we got disconnected from the peer */
- if (tp == 0)
- goto out;
- tcp_output(tp);
+ /* In case we got disconnected from the peer */
+ if (tp == NULL) {
+ goto out;
+ }
+ tcp_sbrcv_trim(tp, &so->so_rcv);
+
+ /*
+ * This tcp_output is solely there to trigger window-updates.
+ * However, we really do not want these window-updates while we
+ * are still in SYN_SENT or SYN_RECEIVED.
+ */
+ if (TCPS_HAVEESTABLISHED(tp->t_state)) {
+ tcp_output(tp);
+ }
+
+#if CONTENT_FILTER
+ cfil_sock_buf_update(&so->so_rcv);
+#endif /* CONTENT_FILTER */
+
COMMON_END(PRU_RCVD);
}
/*
* Do a send by putting data in output queue and updating urgent
- * marker if URG set. Possibly send more data.
+ * marker if URG set. Possibly send more data. Unlike the other
+ * 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,
- struct sockaddr *nam, struct mbuf *control, struct proc *p)
+ struct sockaddr *nam, struct mbuf *control, struct proc *p)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
+ uint32_t msgpri = MSG_PRI_DEFAULT;
+ uint32_t mpkl_len = 0; /* length of mbuf chain */
+ uint32_t mpkl_seq; /* sequence number where new data is added */
+ struct so_mpkl_send_info mpkl_send_info = {};
+
#if INET6
int isipv6;
-#endif /* INET6 */
+#endif
+ TCPDEBUG0;
- COMMON_START();
- if (control && control->m_len) {
- m_freem(control); /* XXX shouldn't caller do this??? */
- if (m)
+ if (inp == NULL || inp->inp_state == INPCB_STATE_DEAD
+#if NECP
+ || (necp_socket_should_use_flow_divert(inp))
+#endif /* NECP */
+ ) {
+ /*
+ * OOPS! we lost a race, the TCP session got reset after
+ * we checked SS_CANTSENDMORE, eg: while doing uiomove or a
+ * network interrupt in the non-splnet() section of sosend().
+ */
+ if (m != NULL) {
m_freem(m);
- error = EINVAL;
+ }
+ if (control != NULL) {
+ m_freem(control);
+ control = NULL;
+ }
+
+ if (inp == NULL) {
+ error = ECONNRESET; /* XXX EPIPE? */
+ } else {
+ error = EPROTOTYPE;
+ }
+ tp = NULL;
+ TCPDEBUG1();
goto out;
}
-
#if INET6
isipv6 = nam && nam->sa_family == AF_INET6;
#endif /* INET6 */
+ tp = intotcpcb(inp);
+ TCPDEBUG1();
+
+ calculate_tcp_clock();
+
+ if (net_mpklog_enabled) {
+ mpkl_seq = tp->snd_una + so->so_snd.sb_cc;
+ if (m) {
+ mpkl_len = m_length(m);
+ }
+ if (so->so_flags1 & SOF1_MPKL_SEND_INFO) {
+ uuid_copy(mpkl_send_info.mpkl_uuid, so->so_mpkl_send_uuid);
+ mpkl_send_info.mpkl_proto = so->so_mpkl_send_proto;
+ }
+ }
+
+ if (control != NULL) {
+ if (so->so_flags & SOF_ENABLE_MSGS) {
+ /* Get the msg priority from control mbufs */
+ error = tcp_get_msg_priority(control, &msgpri);
+ if (error) {
+ m_freem(control);
+ if (m != NULL) {
+ m_freem(m);
+ }
+ control = NULL;
+ m = NULL;
+ goto out;
+ }
+ }
+ if (control->m_len > 0 && net_mpklog_enabled) {
+ error = tcp_get_mpkl_send_info(control, &mpkl_send_info);
+ /*
+ * Intepretation of the returned code:
+ * 0: client wants us to use value passed in SCM_MPKL_SEND_INFO
+ * 1: SCM_MPKL_SEND_INFO was not present
+ * other: failure
+ */
+ if (error != 0 && error != ENOMSG) {
+ m_freem(control);
+ if (m != NULL) {
+ m_freem(m);
+ }
+ control = NULL;
+ m = NULL;
+ goto out;
+ }
+ }
+ /*
+ * Silently drop unsupported ancillary data messages
+ */
+ m_freem(control);
+ control = NULL;
+ }
+
+ if (so->so_flags & SOF_ENABLE_MSGS) {
+ VERIFY(m->m_flags & M_PKTHDR);
+ m->m_pkthdr.msg_pri = msgpri;
+ }
+
+ /* MPTCP sublow socket buffers must not be compressed */
+ VERIFY(!(so->so_flags & SOF_MP_SUBFLOW) ||
+ (so->so_snd.sb_flags & SB_NOCOMPRESS));
+
+ if (!(flags & PRUS_OOB) || (so->so_flags1 & SOF1_PRECONNECT_DATA)) {
+ /* Call msg send if message delivery is enabled */
+ if (so->so_flags & SOF_ENABLE_MSGS) {
+ sbappendmsg_snd(&so->so_snd, m);
+ } else {
+ sbappendstream(&so->so_snd, m);
+ }
- if(!(flags & PRUS_OOB)) {
- sbappend(&so->so_snd, m);
if (nam && tp->t_state < TCPS_SYN_SENT) {
/*
* Do implied connect if not yet connected,
* MSS.
*/
#if INET6
- if (isipv6)
+ if (isipv6) {
error = tcp6_connect(tp, nam, p);
- else
+ } else
#endif /* INET6 */
error = tcp_connect(tp, nam, p);
- if (error)
+ if (error) {
+ TCP_LOG_CONNECT(tp, true, error);
goto out;
+ }
tp->snd_wnd = TTCP_CLIENT_SND_WND;
- tcp_mss(tp, -1, isipv6);
+ tp->max_sndwnd = tp->snd_wnd;
+ tcp_mss(tp, -1, IFSCOPE_NONE);
+
+ TCP_LOG_CONNECT(tp, true, error);
+
+ /* The sequence number of the data is past the SYN */
+ mpkl_seq = tp->iss + 1;
}
if (flags & PRUS_EOF) {
tp = tcp_usrclosed(tp);
}
if (tp != NULL) {
- if (flags & PRUS_MORETOCOME)
+ if (flags & PRUS_MORETOCOME) {
tp->t_flags |= TF_MORETOCOME;
+ }
error = tcp_output(tp);
- if (flags & PRUS_MORETOCOME)
+ if (flags & PRUS_MORETOCOME) {
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,
* MSS.
*/
#if INET6
- if (isipv6)
+ if (isipv6) {
error = tcp6_connect(tp, nam, p);
- else
+ } else
#endif /* INET6 */
error = tcp_connect(tp, nam, p);
- if (error)
+ if (error) {
+ TCP_LOG_CONNECT(tp, true, error);
goto out;
+ }
tp->snd_wnd = TTCP_CLIENT_SND_WND;
- tcp_mss(tp, -1, isipv6);
+ tp->max_sndwnd = tp->snd_wnd;
+ tcp_mss(tp, -1, IFSCOPE_NONE);
+
+ TCP_LOG_CONNECT(tp, true, error);
}
tp->snd_up = tp->snd_una + so->so_snd.sb_cc;
- tp->t_force = 1;
+ tp->t_flagsext |= TF_FORCE;
error = tcp_output(tp);
- tp->t_force = 0;
+ tp->t_flagsext &= ~TF_FORCE;
+ }
+
+ if (net_mpklog_enabled && (inp = tp->t_inpcb) != NULL &&
+ ((inp->inp_last_outifp != NULL &&
+ (inp->inp_last_outifp->if_xflags & IFXF_MPK_LOG)) ||
+ (inp->inp_boundifp != NULL &&
+ (inp->inp_boundifp->if_xflags & IFXF_MPK_LOG)))) {
+ MPKL_TCP_SEND(tcp_mpkl_log_object,
+ mpkl_send_info.mpkl_proto, mpkl_send_info.mpkl_uuid,
+ ntohs(inp->inp_lport), ntohs(inp->inp_fport),
+ mpkl_seq, mpkl_len,
+ so->last_pid, so->so_log_seqn++);
+ }
+
+ /*
+ * We wait for the socket to successfully connect before returning.
+ * This allows us to signal a timeout to the application.
+ */
+ if (so->so_state & SS_ISCONNECTING) {
+ if (so->so_state & SS_NBIO) {
+ error = EWOULDBLOCK;
+ } else {
+ error = sbwait(&so->so_snd);
+ }
}
- COMMON_END((flags & PRUS_OOB) ? PRU_SENDOOB :
- ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND));
+
+ COMMON_END((flags & PRUS_OOB) ? PRU_SENDOOB :
+ ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND));
}
/*
static int
tcp_usr_abort(struct socket *so)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
COMMON_START();
- /* In case we got disconnected from the peer */
- if (tp == 0)
- goto out;
+ /* In case we got disconnected from the peer */
+ if (tp == NULL) {
+ goto out;
+ }
tp = tcp_drop(tp, ECONNABORTED);
+ VERIFY(so->so_usecount > 0);
+ so->so_usecount--;
COMMON_END(PRU_ABORT);
}
/*
* 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)
{
- int s = splnet();
int error = 0;
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp;
COMMON_START();
if ((so->so_oobmark == 0 &&
- (so->so_state & SS_RCVATMARK) == 0) ||
+ (so->so_state & SS_RCVATMARK) == 0) ||
so->so_options & SO_OOBINLINE ||
tp->t_oobflags & TCPOOB_HADDATA) {
error = EINVAL;
}
m->m_len = 1;
*mtod(m, caddr_t) = tp->t_iobc;
- if ((flags & MSG_PEEK) == 0)
+ so->so_state &= ~SS_RCVATMARK;
+ if ((flags & MSG_PEEK) == 0) {
tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA);
+ }
COMMON_END(PRU_RCVOOB);
}
+static int
+tcp_usr_preconnect(struct socket *so)
+{
+ struct inpcb *inp = sotoinpcb(so);
+ int error = 0;
+
+#if NECP
+ if (necp_socket_should_use_flow_divert(inp)) {
+ /* May happen, if in tcp_usr_connect we did not had a chance
+ * to set the usrreqs (due to some error). So, let's get out
+ * of here.
+ */
+ goto out;
+ }
+#endif /* NECP */
+
+ error = tcp_output(sototcpcb(so));
+
+ soclearfastopen(so);
+
+ COMMON_END(PRU_PRECONNECT);
+}
+
/* xxx - should be const */
struct pr_usrreqs tcp_usrreqs = {
- tcp_usr_abort, tcp_usr_accept, tcp_usr_attach, tcp_usr_bind,
- tcp_usr_connect, pru_connect2_notsupp, in_control, tcp_usr_detach,
- tcp_usr_disconnect, tcp_usr_listen, in_setpeeraddr, tcp_usr_rcvd,
- tcp_usr_rcvoob, tcp_usr_send, pru_sense_null, tcp_usr_shutdown,
- in_setsockaddr, sosend, soreceive, sopoll
+ .pru_abort = tcp_usr_abort,
+ .pru_accept = tcp_usr_accept,
+ .pru_attach = tcp_usr_attach,
+ .pru_bind = tcp_usr_bind,
+ .pru_connect = tcp_usr_connect,
+ .pru_connectx = tcp_usr_connectx,
+ .pru_control = in_control,
+ .pru_detach = tcp_usr_detach,
+ .pru_disconnect = tcp_usr_disconnect,
+ .pru_disconnectx = tcp_usr_disconnectx,
+ .pru_listen = tcp_usr_listen,
+ .pru_peeraddr = in_getpeeraddr,
+ .pru_rcvd = tcp_usr_rcvd,
+ .pru_rcvoob = tcp_usr_rcvoob,
+ .pru_send = tcp_usr_send,
+ .pru_shutdown = tcp_usr_shutdown,
+ .pru_sockaddr = in_getsockaddr,
+ .pru_sosend = sosend,
+ .pru_soreceive = soreceive,
+ .pru_preconnect = tcp_usr_preconnect,
};
#if INET6
struct pr_usrreqs tcp6_usrreqs = {
- tcp_usr_abort, tcp6_usr_accept, tcp_usr_attach, tcp6_usr_bind,
- tcp6_usr_connect, pru_connect2_notsupp, in6_control, tcp_usr_detach,
- tcp_usr_disconnect, tcp6_usr_listen, in6_mapped_peeraddr, tcp_usr_rcvd,
- tcp_usr_rcvoob, tcp_usr_send, pru_sense_null, tcp_usr_shutdown,
- in6_mapped_sockaddr, sosend, soreceive, sopoll
+ .pru_abort = tcp_usr_abort,
+ .pru_accept = tcp6_usr_accept,
+ .pru_attach = tcp_usr_attach,
+ .pru_bind = tcp6_usr_bind,
+ .pru_connect = tcp6_usr_connect,
+ .pru_connectx = tcp6_usr_connectx,
+ .pru_control = in6_control,
+ .pru_detach = tcp_usr_detach,
+ .pru_disconnect = tcp_usr_disconnect,
+ .pru_disconnectx = tcp_usr_disconnectx,
+ .pru_listen = tcp6_usr_listen,
+ .pru_peeraddr = in6_mapped_peeraddr,
+ .pru_rcvd = tcp_usr_rcvd,
+ .pru_rcvoob = tcp_usr_rcvoob,
+ .pru_send = tcp_usr_send,
+ .pru_shutdown = tcp_usr_shutdown,
+ .pru_sockaddr = in6_mapped_sockaddr,
+ .pru_sosend = sosend,
+ .pru_soreceive = soreceive,
+ .pru_preconnect = tcp_usr_preconnect,
};
#endif /* INET6 */
* 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)
- register struct tcpcb *tp;
- struct sockaddr *nam;
- struct proc *p;
+tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct proc *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 rmxp_tao *taop;
- struct rmxp_tao tao_noncached;
- int error;
+ struct sockaddr_in *sin = (struct sockaddr_in *)(void *)nam;
+ struct in_addr laddr;
+ int error = 0;
+ struct ifnet *outif = NULL;
if (inp->inp_lport == 0) {
- error = in_pcbbind(inp, (struct sockaddr *)0, p);
- if (error)
- return error;
+ error = in_pcbbind(inp, NULL, p);
+ if (error) {
+ goto done;
+ }
}
/*
* earlier incarnation of this same connection still in
* TIME_WAIT state, creating an ADDRINUSE error.
*/
- error = in_pcbladdr(inp, nam, &ifaddr);
- if (error)
- return error;
+ error = in_pcbladdr(inp, nam, &laddr, IFSCOPE_NONE, &outif, 0);
+ if (error) {
+ goto done;
+ }
+
+ socket_unlock(inp->inp_socket, 0);
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,
- inp->inp_lport, 0, NULL);
+ inp->inp_laddr.s_addr != INADDR_ANY ? inp->inp_laddr : laddr,
+ inp->inp_lport, 0, NULL);
+
+ socket_lock(inp->inp_socket, 0);
if (oinp) {
+ if (oinp != inp) { /* 4143933: avoid deadlock if inp == oinp */
+ socket_lock(oinp->inp_socket, 1);
+ }
+ if (in_pcb_checkstate(oinp, WNT_RELEASE, 1) == WNT_STOPUSING) {
+ if (oinp != inp) {
+ socket_unlock(oinp->inp_socket, 1);
+ }
+ goto skip_oinp;
+ }
+
if (oinp != inp && (otp = intotcpcb(oinp)) != NULL &&
- otp->t_state == TCPS_TIME_WAIT &&
- otp->t_duration < TCPTV_MSL &&
- (otp->t_flags & TF_RCVD_CC))
+ otp->t_state == TCPS_TIME_WAIT &&
+ ((int)(tcp_now - otp->t_starttime)) < tcp_msl &&
+ (otp->t_flags & TF_RCVD_CC)) {
otp = tcp_close(otp);
- else
- return EADDRINUSE;
+ } else {
+ printf("tcp_connect: inp=0x%llx err=EADDRINUSE\n",
+ (uint64_t)VM_KERNEL_ADDRPERM(inp));
+ if (oinp != inp) {
+ socket_unlock(oinp->inp_socket, 1);
+ }
+ error = EADDRINUSE;
+ goto done;
+ }
+ if (oinp != inp) {
+ socket_unlock(oinp->inp_socket, 1);
+ }
+ }
+skip_oinp:
+ if ((inp->inp_laddr.s_addr == INADDR_ANY ? laddr.s_addr :
+ inp->inp_laddr.s_addr) == sin->sin_addr.s_addr &&
+ inp->inp_lport == sin->sin_port) {
+ error = EINVAL;
+ goto done;
+ }
+ if (!lck_rw_try_lock_exclusive(inp->inp_pcbinfo->ipi_lock)) {
+ /*lock inversion issue, mostly with udp multicast packets */
+ socket_unlock(inp->inp_socket, 0);
+ lck_rw_lock_exclusive(inp->inp_pcbinfo->ipi_lock);
+ socket_lock(inp->inp_socket, 0);
+ }
+ if (inp->inp_laddr.s_addr == INADDR_ANY) {
+ inp->inp_laddr = laddr;
+ /* no reference needed */
+ inp->inp_last_outifp = outif;
+
+ inp->inp_flags |= INP_INADDR_ANY;
}
- 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;
- if (inp->inp_laddr.s_addr == INADDR_ANY)
- inp->inp_laddr = ifaddr->sin_addr;
inp->inp_faddr = sin->sin_addr;
inp->inp_fport = sin->sin_port;
in_pcbrehash(inp);
+ lck_rw_done(inp->inp_pcbinfo->ipi_lock);
- tp->t_template = tcp_template(tp);
- if (tp->t_template == 0) {
- in_pcbdisconnect(inp);
- return ENOBUFS;
+ if (inp->inp_flowhash == 0) {
+ inp->inp_flowhash = inp_calc_flowhash(inp);
}
- /* 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++;
+ tcp_set_max_rwinscale(tp, so, outif);
soisconnecting(so);
tcpstat.tcps_connattempt++;
tp->t_state = TCPS_SYN_SENT;
- tp->t_timer[TCPT_KEEP] = tcp_keepinit;
-#ifdef TCP_COMPAT_42
- tp->iss = tcp_iss;
- tcp_iss =+ TCP_ISSINCR/2;
-#else /* TCP_COMPAT_42 */
- tp->iss = tcp_rndiss_next();
-#endif /* !TCP_COMPAT_42 */
-
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp, TCP_CONN_KEEPINIT(tp));
+ tp->iss = tcp_new_isn(tp);
tcp_sendseqinit(tp);
-
- /*
- * Generate a CC value for this connection and
- * check whether CC or CCnew should be used.
- */
- if ((taop = tcp_gettaocache(tp->t_inpcb)) == NULL) {
- taop = &tao_noncached;
- bzero(taop, sizeof(*taop));
+ tp->t_connect_time = tcp_now;
+ if (nstat_collect) {
+ nstat_route_connect_attempt(inp->inp_route.ro_rt);
}
- tp->cc_send = CC_INC(tcp_ccgen);
- if (taop->tao_ccsent != 0 &&
- CC_GEQ(tp->cc_send, taop->tao_ccsent)) {
- taop->tao_ccsent = tp->cc_send;
- } else {
- taop->tao_ccsent = 0;
- tp->t_flags |= TF_SENDCCNEW;
+done:
+ if (outif != NULL) {
+ ifnet_release(outif);
}
- return 0;
+ return error;
}
#if INET6
static int
-tcp6_connect(tp, nam, p)
- register struct tcpcb *tp;
- struct sockaddr *nam;
- struct proc *p;
+tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct proc *p)
{
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 in6_addr *addr6;
- struct rmxp_tao *taop;
- struct rmxp_tao tao_noncached;
- int error;
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)(void *)nam;
+ struct in6_addr addr6;
+ int error = 0;
+ struct ifnet *outif = NULL;
if (inp->inp_lport == 0) {
- error = in6_pcbbind(inp, (struct sockaddr *)0, p);
- if (error)
- return error;
+ error = in6_pcbbind(inp, NULL, p);
+ if (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);
- if (error)
- return error;
+ error = in6_pcbladdr(inp, nam, &addr6, &outif);
+ if (error) {
+ goto done;
+ }
+ socket_unlock(inp->inp_socket, 0);
oinp = in6_pcblookup_hash(inp->inp_pcbinfo,
- &sin6->sin6_addr, sin6->sin6_port,
- IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
- ? addr6
- : &inp->in6p_laddr,
- inp->inp_lport, 0, NULL);
+ &sin6->sin6_addr, sin6->sin6_port,
+ IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)
+ ? &addr6
+ : &inp->in6p_laddr,
+ inp->inp_lport, 0, NULL);
+ socket_lock(inp->inp_socket, 0);
if (oinp) {
if (oinp != inp && (otp = intotcpcb(oinp)) != NULL &&
otp->t_state == TCPS_TIME_WAIT &&
- otp->t_duration < TCPTV_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->ipi_lock)) {
+ /*lock inversion issue, mostly with udp multicast packets */
+ socket_unlock(inp->inp_socket, 0);
+ lck_rw_lock_exclusive(inp->inp_pcbinfo->ipi_lock);
+ socket_lock(inp->inp_socket, 0);
+ }
+ if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr)) {
+ inp->in6p_laddr = addr6;
+ inp->in6p_last_outifp = outif; /* no reference needed */
+ inp->in6p_flags |= INP_IN6ADDR_ANY;
}
- if (IN6_IS_ADDR_UNSPECIFIED(&inp->in6p_laddr))
- inp->in6p_laddr = *addr6;
inp->in6p_faddr = sin6->sin6_addr;
inp->inp_fport = sin6->sin6_port;
- /*
- * xxx kazu flowlabel is necessary for connect?
- * but if this line is missing, the garbage value remains.
- */
- inp->in6p_flowinfo = sin6->sin6_flowinfo;
-
+ if ((sin6->sin6_flowinfo & IPV6_FLOWINFO_MASK) != 0) {
+ inp->inp_flow = sin6->sin6_flowinfo;
+ }
in_pcbrehash(inp);
+ lck_rw_done(inp->inp_pcbinfo->ipi_lock);
- tp->t_template = tcp_template(tp);
- if (tp->t_template == 0) {
- in6_pcbdisconnect(inp);
- return ENOBUFS;
+ if (inp->inp_flowhash == 0) {
+ inp->inp_flowhash = inp_calc_flowhash(inp);
+ }
+ /* update flowinfo - RFC 6437 */
+ if (inp->inp_flow == 0 && inp->in6p_flags & IN6P_AUTOFLOWLABEL) {
+ inp->inp_flow &= ~IPV6_FLOWLABEL_MASK;
+ inp->inp_flow |=
+ (htonl(inp->inp_flowhash) & IPV6_FLOWLABEL_MASK);
}
- /* 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++;
+ tcp_set_max_rwinscale(tp, so, outif);
soisconnecting(so);
tcpstat.tcps_connattempt++;
tp->t_state = TCPS_SYN_SENT;
- tp->t_timer[TCPT_KEEP] = tcp_keepinit;
-#ifdef TCP_COMPAT_42
- tp->iss = tcp_iss; tcp_iss += TCP_ISSINCR/2;
-#else
- tp->iss = tcp_rndiss_next();
-#endif /* TCP_COMPAT_42 */
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
+ TCP_CONN_KEEPINIT(tp));
+ tp->iss = tcp_new_isn(tp);
tcp_sendseqinit(tp);
-
- /*
- * Generate a CC value for this connection and
- * check whether CC or CCnew should be used.
- */
- if ((taop = tcp_gettaocache(tp->t_inpcb)) == NULL) {
- taop = &tao_noncached;
- bzero(taop, sizeof(*taop));
+ tp->t_connect_time = tcp_now;
+ if (nstat_collect) {
+ nstat_route_connect_attempt(inp->inp_route.ro_rt);
}
- tp->cc_send = CC_INC(tcp_ccgen);
- if (taop->tao_ccsent != 0 &&
- CC_GEQ(tp->cc_send, taop->tao_ccsent)) {
- taop->tao_ccsent = tp->cc_send;
- } else {
- taop->tao_ccsent = 0;
- tp->t_flags |= TF_SENDCCNEW;
+done:
+ if (outif != NULL) {
+ ifnet_release(outif);
}
- return 0;
+ return error;
}
#endif /* INET6 */
/*
- * 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
- * splnet() is probably a Bad Thing. (Since sockets and pcbs both now
- * use TSM, there probably isn't any need for this function to run at
- * splnet() any more. This needs more examination.)
+ * Export TCP internal state information via a struct tcp_info
*/
-int
-tcp_ctloutput(so, sopt)
- struct socket *so;
- struct sockopt *sopt;
+void
+tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti)
{
- int error, opt, optval, s;
- struct inpcb *inp;
- struct tcpcb *tp;
+ struct inpcb *inp = tp->t_inpcb;
- error = 0;
- s = splnet(); /* XXX */
- inp = sotoinpcb(so);
- if (inp == NULL) {
- splx(s);
- return (ECONNRESET);
- }
- if (sopt->sopt_level != IPPROTO_TCP) {
-#if INET6
- if (INP_CHECK_SOCKAF(so, AF_INET6))
- error = ip6_ctloutput(so, sopt);
- else
-#endif /* INET6 */
- error = ip_ctloutput(so, sopt);
- splx(s);
- return (error);
- }
- tp = intotcpcb(inp);
- if (tp == NULL) {
- splx(s);
- return (ECONNRESET);
- }
+ bzero(ti, sizeof(*ti));
- switch (sopt->sopt_dir) {
- case SOPT_SET:
- switch (sopt->sopt_name) {
- case TCP_NODELAY:
- case TCP_NOOPT:
- case TCP_NOPUSH:
- error = sooptcopyin(sopt, &optval, sizeof optval,
- sizeof optval);
- if (error)
- break;
+ ti->tcpi_state = tp->t_state;
+ ti->tcpi_flowhash = inp->inp_flowhash;
- switch (sopt->sopt_name) {
- case TCP_NODELAY:
- opt = TF_NODELAY;
- break;
- case TCP_NOOPT:
- opt = TF_NOOPT;
- break;
- case TCP_NOPUSH:
- opt = TF_NOPUSH;
- break;
- default:
- opt = 0; /* dead code to fool gcc */
- break;
- }
+ if (tp->t_state > TCPS_LISTEN) {
+ if (TSTMP_SUPPORTED(tp)) {
+ ti->tcpi_options |= TCPI_OPT_TIMESTAMPS;
+ }
+ if (SACK_ENABLED(tp)) {
+ ti->tcpi_options |= TCPI_OPT_SACK;
+ }
+ if (TCP_WINDOW_SCALE_ENABLED(tp)) {
+ ti->tcpi_options |= TCPI_OPT_WSCALE;
+ ti->tcpi_snd_wscale = tp->snd_scale;
+ ti->tcpi_rcv_wscale = tp->rcv_scale;
+ }
+ if (TCP_ECN_ENABLED(tp)) {
+ ti->tcpi_options |= TCPI_OPT_ECN;
+ }
- if (optval)
- tp->t_flags |= opt;
- else
- tp->t_flags &= ~opt;
- break;
+ /* Are we in retranmission episode */
+ if (IN_FASTRECOVERY(tp) || tp->t_rxtshift > 0) {
+ ti->tcpi_flags |= TCPI_FLAG_LOSSRECOVERY;
+ }
- case TCP_MAXSEG:
- error = sooptcopyin(sopt, &optval, sizeof optval,
- sizeof optval);
- if (error)
- break;
+ if (tp->t_flags & TF_STREAMING_ON) {
+ ti->tcpi_flags |= TCPI_FLAG_STREAMING_ON;
+ }
- if (optval > 0 && optval <= tp->t_maxseg)
- tp->t_maxseg = optval;
- else
- error = EINVAL;
- break;
+ 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;
- default:
- error = ENOPROTOOPT;
- break;
+ 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_rttbest = tp->t_rttbest >> TCP_RTT_SHIFT;
+
+ ti->tcpi_snd_ssthresh = tp->snd_ssthresh;
+ ti->tcpi_snd_cwnd = tp->snd_cwnd;
+ ti->tcpi_snd_sbbytes = inp->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);
}
- break;
- case SOPT_GET:
- switch (sopt->sopt_name) {
- case TCP_NODELAY:
- optval = tp->t_flags & TF_NODELAY;
- break;
- case TCP_MAXSEG:
- optval = tp->t_maxseg;
- break;
- case TCP_NOOPT:
- optval = tp->t_flags & TF_NOOPT;
- break;
- case TCP_NOPUSH:
- optval = tp->t_flags & TF_NOPUSH;
- break;
- default:
- error = ENOPROTOOPT;
- break;
+ 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_txpackets = inp->inp_stat->txpackets;
+ ti->tcpi_txbytes = inp->inp_stat->txbytes;
+ ti->tcpi_txretransmitbytes = tp->t_stat.txretransmitbytes;
+ ti->tcpi_txretransmitpackets = tp->t_stat.rxmitpkts;
+ ti->tcpi_txunacked = tp->snd_max - tp->snd_una;
+
+ //atomic_get_64(ti->tcpi_rxbytes, &inp->inp_stat->rxbytes);
+ ti->tcpi_rxpackets = inp->inp_stat->rxpackets;
+ ti->tcpi_rxbytes = inp->inp_stat->rxbytes;
+ ti->tcpi_rxduplicatebytes = tp->t_stat.rxduplicatebytes;
+ ti->tcpi_rxoutoforderbytes = tp->t_stat.rxoutoforderbytes;
+
+ if (tp->t_state > TCPS_LISTEN) {
+ ti->tcpi_synrexmits = tp->t_stat.rxmitsyns;
}
- if (error == 0)
- error = sooptcopyout(sopt, &optval, sizeof optval);
- break;
+ ti->tcpi_cell_rxpackets = inp->inp_cstat->rxpackets;
+ ti->tcpi_cell_rxbytes = inp->inp_cstat->rxbytes;
+ ti->tcpi_cell_txpackets = inp->inp_cstat->txpackets;
+ ti->tcpi_cell_txbytes = inp->inp_cstat->txbytes;
+
+ ti->tcpi_wifi_rxpackets = inp->inp_wstat->rxpackets;
+ ti->tcpi_wifi_rxbytes = inp->inp_wstat->rxbytes;
+ ti->tcpi_wifi_txpackets = inp->inp_wstat->txpackets;
+ ti->tcpi_wifi_txbytes = inp->inp_wstat->txbytes;
+
+ ti->tcpi_wired_rxpackets = inp->inp_Wstat->rxpackets;
+ ti->tcpi_wired_rxbytes = inp->inp_Wstat->rxbytes;
+ ti->tcpi_wired_txpackets = inp->inp_Wstat->txpackets;
+ ti->tcpi_wired_txbytes = inp->inp_Wstat->txbytes;
+ tcp_get_connectivity_status(tp, &ti->tcpi_connstatus);
+
+ ti->tcpi_tfo_syn_data_rcv = !!(tp->t_tfo_stats & TFO_S_SYNDATA_RCV);
+ ti->tcpi_tfo_cookie_req_rcv = !!(tp->t_tfo_stats & TFO_S_COOKIEREQ_RECV);
+ ti->tcpi_tfo_cookie_sent = !!(tp->t_tfo_stats & TFO_S_COOKIE_SENT);
+ ti->tcpi_tfo_cookie_invalid = !!(tp->t_tfo_stats & TFO_S_COOKIE_INVALID);
+
+ ti->tcpi_tfo_cookie_req = !!(tp->t_tfo_stats & TFO_S_COOKIE_REQ);
+ ti->tcpi_tfo_cookie_rcv = !!(tp->t_tfo_stats & TFO_S_COOKIE_RCV);
+ ti->tcpi_tfo_syn_data_sent = !!(tp->t_tfo_stats & TFO_S_SYN_DATA_SENT);
+ ti->tcpi_tfo_syn_data_acked = !!(tp->t_tfo_stats & TFO_S_SYN_DATA_ACKED);
+ ti->tcpi_tfo_syn_loss = !!(tp->t_tfo_stats & TFO_S_SYN_LOSS);
+ ti->tcpi_tfo_cookie_wrong = !!(tp->t_tfo_stats & TFO_S_COOKIE_WRONG);
+ ti->tcpi_tfo_no_cookie_rcv = !!(tp->t_tfo_stats & TFO_S_NO_COOKIE_RCV);
+ ti->tcpi_tfo_heuristics_disable = !!(tp->t_tfo_stats & TFO_S_HEURISTICS_DISABLE);
+ ti->tcpi_tfo_send_blackhole = !!(tp->t_tfo_stats & TFO_S_SEND_BLACKHOLE);
+ ti->tcpi_tfo_recv_blackhole = !!(tp->t_tfo_stats & TFO_S_RECV_BLACKHOLE);
+ ti->tcpi_tfo_onebyte_proxy = !!(tp->t_tfo_stats & TFO_S_ONE_BYTE_PROXY);
+
+ ti->tcpi_ecn_client_setup = !!(tp->ecn_flags & TE_SETUPSENT);
+ ti->tcpi_ecn_server_setup = !!(tp->ecn_flags & TE_SETUPRECEIVED);
+ ti->tcpi_ecn_success = (tp->ecn_flags & TE_ECN_ON) == TE_ECN_ON ? 1 : 0;
+ ti->tcpi_ecn_lost_syn = !!(tp->ecn_flags & TE_LOST_SYN);
+ ti->tcpi_ecn_lost_synack = !!(tp->ecn_flags & TE_LOST_SYNACK);
+
+ ti->tcpi_local_peer = !!(tp->t_flags & TF_LOCAL);
+
+ if (tp->t_inpcb->inp_last_outifp != NULL) {
+ if (IFNET_IS_CELLULAR(tp->t_inpcb->inp_last_outifp)) {
+ ti->tcpi_if_cell = 1;
+ }
+ if (IFNET_IS_WIFI(tp->t_inpcb->inp_last_outifp)) {
+ ti->tcpi_if_wifi = 1;
+ }
+ if (IFNET_IS_WIRED(tp->t_inpcb->inp_last_outifp)) {
+ ti->tcpi_if_wired = 1;
+ }
+ if (IFNET_IS_WIFI_INFRA(tp->t_inpcb->inp_last_outifp)) {
+ ti->tcpi_if_wifi_infra = 1;
+ }
+ if (tp->t_inpcb->inp_last_outifp->if_eflags & IFEF_AWDL) {
+ ti->tcpi_if_wifi_awdl = 1;
+ }
+ }
+ if (tp->tcp_cc_index == TCP_CC_ALGO_BACKGROUND_INDEX) {
+ ti->tcpi_snd_background = 1;
+ }
+ if (tcp_recv_bg == 1 ||
+ IS_TCP_RECV_BG(tp->t_inpcb->inp_socket)) {
+ ti->tcpi_rcv_background = 1;
+ }
+
+ ti->tcpi_ecn_recv_ce = tp->t_ecn_recv_ce;
+ ti->tcpi_ecn_recv_cwr = tp->t_ecn_recv_cwr;
+
+ ti->tcpi_rcvoopack = tp->t_rcvoopack;
+ ti->tcpi_pawsdrop = tp->t_pawsdrop;
+ ti->tcpi_sack_recovery_episode = tp->t_sack_recovery_episode;
+ ti->tcpi_reordered_pkts = tp->t_reordered_pkts;
+ ti->tcpi_dsack_sent = tp->t_dsack_sent;
+ ti->tcpi_dsack_recvd = tp->t_dsack_recvd;
}
- splx(s);
- return (error);
}
-/*
- * tcp_sendspace and tcp_recvspace are the default send and receive window
- * 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, "");
-u_long tcp_recvspace = 1024*16;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace,
- CTLFLAG_RW, &tcp_recvspace , 0, "");
-
-/*
- * Attach TCP protocol to socket, allocating
- * internet protocol control block, tcp control block,
- * bufer space, and entering LISTEN state if to accept connections.
- */
-static int
-tcp_attach(so, p)
- struct socket *so;
- struct proc *p;
+__private_extern__ errno_t
+tcp_fill_info_for_info_tuple(struct info_tuple *itpl, struct tcp_info *ti)
{
- register struct tcpcb *tp;
- struct inpcb *inp;
- int error;
-#if INET6
- int isipv6 = INP_CHECK_SOCKAF(so, AF_INET) == NULL;
-#endif /* INET6 */
+ struct inpcbinfo *pcbinfo = NULL;
+ struct inpcb *inp = NULL;
+ struct socket *so;
+ struct tcpcb *tp;
- if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
- error = soreserve(so, tcp_sendspace, tcp_recvspace);
- if (error)
- return (error);
+ if (itpl->itpl_proto == IPPROTO_TCP) {
+ pcbinfo = &tcbinfo;
+ } else {
+ return EINVAL;
}
- error = in_pcballoc(so, &tcbinfo, p);
- if (error)
- return (error);
- inp = sotoinpcb(so);
-#if IPSEC
- error = ipsec_init_policy(so, &inp->inp_sp);
- if (error) {
-#if INET6
- if (isipv6)
- in6_pcbdetach(inp);
- else
-#endif /* INET6 */
- in_pcbdetach(inp);
- return (error);
+
+ 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;
}
-#endif /*IPSEC*/
-#if INET6
+ 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;
+}
+
+static void
+tcp_connection_fill_info(struct tcpcb *tp, struct tcp_connection_info *tci)
+{
+ struct inpcb *inp = tp->t_inpcb;
+
+ bzero(tci, sizeof(*tci));
+ tci->tcpi_state = tp->t_state;
+ if (tp->t_state > TCPS_LISTEN) {
+ if (TSTMP_SUPPORTED(tp)) {
+ tci->tcpi_options |= TCPCI_OPT_TIMESTAMPS;
+ }
+ if (SACK_ENABLED(tp)) {
+ tci->tcpi_options |= TCPCI_OPT_SACK;
+ }
+ if (TCP_WINDOW_SCALE_ENABLED(tp)) {
+ tci->tcpi_options |= TCPCI_OPT_WSCALE;
+ tci->tcpi_snd_wscale = tp->snd_scale;
+ tci->tcpi_rcv_wscale = tp->rcv_scale;
+ }
+ if (TCP_ECN_ENABLED(tp)) {
+ tci->tcpi_options |= TCPCI_OPT_ECN;
+ }
+ if (IN_FASTRECOVERY(tp) || tp->t_rxtshift > 0) {
+ tci->tcpi_flags |= TCPCI_FLAG_LOSSRECOVERY;
+ }
+ if (tp->t_flagsext & TF_PKTS_REORDERED) {
+ tci->tcpi_flags |= TCPCI_FLAG_REORDERING_DETECTED;
+ }
+ tci->tcpi_rto = (tp->t_timer[TCPT_REXMT] > 0) ?
+ tp->t_rxtcur : 0;
+ tci->tcpi_maxseg = tp->t_maxseg;
+ tci->tcpi_snd_ssthresh = tp->snd_ssthresh;
+ tci->tcpi_snd_cwnd = tp->snd_cwnd;
+ tci->tcpi_snd_wnd = tp->snd_wnd;
+ tci->tcpi_snd_sbbytes = inp->inp_socket->so_snd.sb_cc;
+ tci->tcpi_rcv_wnd = tp->rcv_wnd;
+ tci->tcpi_rttcur = tp->t_rttcur;
+ tci->tcpi_srtt = (tp->t_srtt >> TCP_RTT_SHIFT);
+ tci->tcpi_rttvar = (tp->t_rttvar >> TCP_RTTVAR_SHIFT);
+ tci->tcpi_txpackets = inp->inp_stat->txpackets;
+ tci->tcpi_txbytes = inp->inp_stat->txbytes;
+ tci->tcpi_txretransmitbytes = tp->t_stat.txretransmitbytes;
+ tci->tcpi_txretransmitpackets = tp->t_stat.rxmitpkts;
+ tci->tcpi_rxpackets = inp->inp_stat->rxpackets;
+ tci->tcpi_rxbytes = inp->inp_stat->rxbytes;
+ tci->tcpi_rxoutoforderbytes = tp->t_stat.rxoutoforderbytes;
+
+ tci->tcpi_tfo_syn_data_rcv = !!(tp->t_tfo_stats & TFO_S_SYNDATA_RCV);
+ tci->tcpi_tfo_cookie_req_rcv = !!(tp->t_tfo_stats & TFO_S_COOKIEREQ_RECV);
+ tci->tcpi_tfo_cookie_sent = !!(tp->t_tfo_stats & TFO_S_COOKIE_SENT);
+ tci->tcpi_tfo_cookie_invalid = !!(tp->t_tfo_stats & TFO_S_COOKIE_INVALID);
+ tci->tcpi_tfo_cookie_req = !!(tp->t_tfo_stats & TFO_S_COOKIE_REQ);
+ tci->tcpi_tfo_cookie_rcv = !!(tp->t_tfo_stats & TFO_S_COOKIE_RCV);
+ tci->tcpi_tfo_syn_data_sent = !!(tp->t_tfo_stats & TFO_S_SYN_DATA_SENT);
+ tci->tcpi_tfo_syn_data_acked = !!(tp->t_tfo_stats & TFO_S_SYN_DATA_ACKED);
+ tci->tcpi_tfo_syn_loss = !!(tp->t_tfo_stats & TFO_S_SYN_LOSS);
+ tci->tcpi_tfo_cookie_wrong = !!(tp->t_tfo_stats & TFO_S_COOKIE_WRONG);
+ tci->tcpi_tfo_no_cookie_rcv = !!(tp->t_tfo_stats & TFO_S_NO_COOKIE_RCV);
+ tci->tcpi_tfo_heuristics_disable = !!(tp->t_tfo_stats & TFO_S_HEURISTICS_DISABLE);
+ tci->tcpi_tfo_send_blackhole = !!(tp->t_tfo_stats & TFO_S_SEND_BLACKHOLE);
+ tci->tcpi_tfo_recv_blackhole = !!(tp->t_tfo_stats & TFO_S_RECV_BLACKHOLE);
+ tci->tcpi_tfo_onebyte_proxy = !!(tp->t_tfo_stats & TFO_S_ONE_BYTE_PROXY);
+ }
+}
+
+
+__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;
+ struct in6_addr laddr6, faddr6;
+ struct in_addr laddr4, faddr4;
+
+ if (inp->inp_vflag & INP_IPV6) {
+ laddr6 = inp->in6p_laddr;
+ faddr6 = inp->in6p_faddr;
+ } else if (inp->inp_vflag & INP_IPV4) {
+ laddr4 = inp->inp_laddr;
+ faddr4 = inp->inp_faddr;
+ }
+
+ socket_unlock(so, 0);
+ if (inp->inp_vflag & INP_IPV6) {
+ finp = in6_pcblookup_hash(&tcbinfo, &laddr6, lport, &faddr6, fport, 0, NULL);
+ } else if (inp->inp_vflag & INP_IPV4) {
+ finp = in_pcblookup_hash(&tcbinfo, laddr4, lport, faddr4, fport, 0, NULL);
+ }
+
+ if (finp) {
+ *out_pid = finp->inp_socket->last_pid;
+ error = 0;
+ in_pcb_checkstate(finp, WNT_RELEASE, 0);
+ }
+ socket_lock(so, 0);
+
+ return error;
+}
+
+void
+tcp_getconninfo(struct socket *so, struct conninfo_tcp *tcp_ci)
+{
+ (void) tcp_lookup_peer_pid_locked(so, &tcp_ci->tcpci_peer_pid);
+ tcp_fill_info(sototcpcb(so), &tcp_ci->tcpci_tcp_info);
+}
+
+void
+tcp_clear_keep_alive_offload(struct socket *so)
+{
+ struct inpcb *inp;
+ struct ifnet *ifp;
+
+ inp = sotoinpcb(so);
+ if (inp == NULL) {
+ return;
+ }
+
+ if ((inp->inp_flags2 & INP2_KEEPALIVE_OFFLOAD) == 0) {
+ return;
+ }
+
+ ifp = inp->inp_boundifp != NULL ? inp->inp_boundifp :
+ inp->inp_last_outifp;
+ if (ifp == NULL) {
+ panic("%s: so %p inp %p ifp NULL",
+ __func__, so, inp);
+ }
+
+ ifnet_lock_exclusive(ifp);
+
+ if (ifp->if_tcp_kao_cnt == 0) {
+ panic("%s: so %p inp %p ifp %p if_tcp_kao_cnt == 0",
+ __func__, so, inp, ifp);
+ }
+ ifp->if_tcp_kao_cnt--;
+ inp->inp_flags2 &= ~INP2_KEEPALIVE_OFFLOAD;
+
+ ifnet_lock_done(ifp);
+}
+
+static int
+tcp_set_keep_alive_offload(struct socket *so, struct proc *proc)
+{
+ int error = 0;
+ struct inpcb *inp;
+ struct ifnet *ifp;
+
+ inp = sotoinpcb(so);
+ if (inp == NULL) {
+ return ECONNRESET;
+ }
+ if ((inp->inp_flags2 & INP2_KEEPALIVE_OFFLOAD) != 0) {
+ return 0;
+ }
+
+ ifp = inp->inp_boundifp != NULL ? inp->inp_boundifp :
+ inp->inp_last_outifp;
+ if (ifp == NULL) {
+ error = ENXIO;
+ os_log_info(OS_LOG_DEFAULT,
+ "%s: error %d for proc %s[%u] out ifp is not set\n",
+ __func__, error,
+ proc != NULL ? proc->p_comm : "kernel",
+ proc != NULL ? proc->p_pid : 0);
+ return ENXIO;
+ }
+
+ error = if_get_tcp_kao_max(ifp);
+ if (error != 0) {
+ return error;
+ }
+
+ ifnet_lock_exclusive(ifp);
+ if (ifp->if_tcp_kao_cnt < ifp->if_tcp_kao_max) {
+ ifp->if_tcp_kao_cnt++;
+ inp->inp_flags2 |= INP2_KEEPALIVE_OFFLOAD;
+ } else {
+ error = ETOOMANYREFS;
+ os_log_info(OS_LOG_DEFAULT,
+ "%s: error %d for proc %s[%u] if_tcp_kao_max %u\n",
+ __func__, error,
+ proc != NULL ? proc->p_comm : "kernel",
+ proc != NULL ? proc->p_pid : 0,
+ ifp->if_tcp_kao_max);
+ }
+ ifnet_lock_done(ifp);
+
+ 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
+ * splnet() is probably a Bad Thing. (Since sockets and pcbs both now
+ * use TSM, there probably isn't any need for this function to run at
+ * splnet() any more. This needs more examination.)
+ */
+int
+tcp_ctloutput(struct socket *so, struct sockopt *sopt)
+{
+ int error = 0, opt = 0, optval = 0;
+ struct inpcb *inp;
+ struct tcpcb *tp;
+
+ inp = sotoinpcb(so);
+ if (inp == NULL) {
+ return ECONNRESET;
+ }
+ /* Allow <SOL_SOCKET,SO_FLUSH/SO_TRAFFIC_MGT_BACKGROUND> at this level */
+ if (sopt->sopt_level != IPPROTO_TCP &&
+ !(sopt->sopt_level == SOL_SOCKET && (sopt->sopt_name == SO_FLUSH ||
+ sopt->sopt_name == SO_TRAFFIC_MGT_BACKGROUND))) {
+#if INET6
+ if (SOCK_CHECK_DOM(so, PF_INET6)) {
+ error = ip6_ctloutput(so, sopt);
+ } else
+#endif /* INET6 */
+ error = ip_ctloutput(so, sopt);
+ return error;
+ }
+ tp = intotcpcb(inp);
+ if (tp == NULL) {
+ return ECONNRESET;
+ }
+
+ calculate_tcp_clock();
+
+ switch (sopt->sopt_dir) {
+ case SOPT_SET:
+ switch (sopt->sopt_name) {
+ case TCP_NODELAY:
+ case TCP_NOOPT:
+ case TCP_NOPUSH:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error) {
+ break;
+ }
+
+ switch (sopt->sopt_name) {
+ case TCP_NODELAY:
+ opt = TF_NODELAY;
+ break;
+ case TCP_NOOPT:
+ opt = TF_NOOPT;
+ break;
+ case TCP_NOPUSH:
+ opt = TF_NOPUSH;
+ break;
+ default:
+ opt = 0; /* dead code to fool gcc */
+ break;
+ }
+
+ if (optval) {
+ tp->t_flags |= opt;
+ } else {
+ tp->t_flags &= ~opt;
+ }
+ break;
+ case TCP_RXT_FINDROP:
+ case TCP_NOTIMEWAIT:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error) {
+ break;
+ }
+ switch (sopt->sopt_name) {
+ case TCP_RXT_FINDROP:
+ opt = TF_RXTFINDROP;
+ break;
+ case TCP_NOTIMEWAIT:
+ opt = TF_NOTIMEWAIT;
+ break;
+ default:
+ opt = 0;
+ break;
+ }
+ 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);
+ if (error) {
+ break;
+ }
+
+ if (optval > 0 && optval <= tp->t_maxseg &&
+ optval + 40 >= tcp_minmss) {
+ tp->t_maxseg = optval;
+ } else {
+ error = EINVAL;
+ }
+ break;
+
+ case TCP_KEEPALIVE:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > UINT32_MAX / TCP_RETRANSHZ) {
+ error = EINVAL;
+ } else {
+ tp->t_keepidle = optval * TCP_RETRANSHZ;
+ /* reset the timer to new value */
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
+ TCP_CONN_KEEPIDLE(tp));
+ tcp_check_timer_state(tp);
+ }
+ break;
+
+ case TCP_CONNECTIONTIMEOUT:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > UINT32_MAX / TCP_RETRANSHZ) {
+ error = EINVAL;
+ } else {
+ tp->t_keepinit = optval * TCP_RETRANSHZ;
+ if (tp->t_state == TCPS_SYN_RECEIVED ||
+ tp->t_state == TCPS_SYN_SENT) {
+ tp->t_timer[TCPT_KEEP] = OFFSET_FROM_START(tp,
+ TCP_CONN_KEEPINIT(tp));
+ tcp_check_timer_state(tp);
+ }
+ }
+ break;
+
+ case TCP_KEEPINTVL:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > UINT32_MAX / TCP_RETRANSHZ) {
+ error = EINVAL;
+ } else {
+ tp->t_keepintvl = optval * TCP_RETRANSHZ;
+ if (tp->t_state == TCPS_FIN_WAIT_2 &&
+ TCP_CONN_MAXIDLE(tp) > 0) {
+ tp->t_timer[TCPT_2MSL] = OFFSET_FROM_START(tp,
+ TCP_CONN_MAXIDLE(tp));
+ tcp_check_timer_state(tp);
+ }
+ }
+ break;
+
+ case TCP_KEEPCNT:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > INT32_MAX) {
+ error = EINVAL;
+ } else {
+ tp->t_keepcnt = optval;
+ if (tp->t_state == TCPS_FIN_WAIT_2 &&
+ TCP_CONN_MAXIDLE(tp) > 0) {
+ tp->t_timer[TCPT_2MSL] = OFFSET_FROM_START(tp,
+ TCP_CONN_MAXIDLE(tp));
+ tcp_check_timer_state(tp);
+ }
+ }
+ break;
+
+ case TCP_KEEPALIVE_OFFLOAD:
+ if ((error = priv_check_cred(kauth_cred_get(),
+ PRIV_NETINET_TCP_KA_OFFLOAD, 0)) != 0) {
+ break;
+ }
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > INT32_MAX) {
+ error = EINVAL;
+ break;
+ }
+ if (optval != 0) {
+ error = tcp_set_keep_alive_offload(so,
+ sopt->sopt_p);
+ } else {
+ tcp_clear_keep_alive_offload(so);
+ }
+ 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->t_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 TCP_ADAPTIVE_READ_TIMEOUT:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 ||
+ optval > TCP_ADAPTIVE_TIMEOUT_MAX) {
+ error = EINVAL;
+ break;
+ } else if (optval == 0) {
+ tp->t_adaptive_rtimo = 0;
+ tcp_keepalive_reset(tp);
+
+ if (tp->t_mpsub) {
+ mptcp_reset_keepalive(tp);
+ }
+ } else {
+ tp->t_adaptive_rtimo = optval;
+ }
+ break;
+ case TCP_ADAPTIVE_WRITE_TIMEOUT:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 ||
+ optval > TCP_ADAPTIVE_TIMEOUT_MAX) {
+ error = EINVAL;
+ break;
+ } else {
+ tp->t_adaptive_wtimo = optval;
+ }
+ break;
+ case TCP_ENABLE_MSGS:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > 1) {
+ error = EINVAL;
+ } else if (optval == 1) {
+ /*
+ * Check if messages option is already
+ * enabled, if so return.
+ */
+ if (so->so_flags & SOF_ENABLE_MSGS) {
+ VERIFY(so->so_msg_state != NULL);
+ break;
+ }
+
+ /*
+ * allocate memory for storing message
+ * related state
+ */
+ VERIFY(so->so_msg_state == NULL);
+ MALLOC(so->so_msg_state,
+ struct msg_state *,
+ sizeof(struct msg_state),
+ M_TEMP, M_WAITOK | M_ZERO);
+ if (so->so_msg_state == NULL) {
+ error = ENOMEM;
+ break;
+ }
+
+ /* Enable message delivery */
+ so->so_flags |= SOF_ENABLE_MSGS;
+ } else {
+ /*
+ * Can't disable message delivery on socket
+ * because of restrictions imposed by
+ * encoding/decoding
+ */
+ error = EINVAL;
+ }
+ break;
+ case TCP_SENDMOREACKS:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > 1) {
+ error = EINVAL;
+ } else if (optval == 0) {
+ tp->t_flagsext &= ~(TF_NOSTRETCHACK);
+ } else {
+ tp->t_flagsext |= TF_NOSTRETCHACK;
+ }
+ break;
+ case TCP_DISABLE_BLACKHOLE_DETECTION:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > 1) {
+ error = EINVAL;
+ } else if (optval == 0) {
+ tp->t_flagsext &= ~TF_NOBLACKHOLE_DETECTION;
+ } else {
+ tp->t_flagsext |= TF_NOBLACKHOLE_DETECTION;
+ if ((tp->t_flags & TF_BLACKHOLE) &&
+ tp->t_pmtud_saved_maxopd > 0) {
+ tcp_pmtud_revert_segment_size(tp);
+ }
+ }
+ break;
+ case TCP_FASTOPEN:
+ if (!(tcp_fastopen & TCP_FASTOPEN_SERVER)) {
+ error = ENOTSUP;
+ break;
+ }
+
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > 1) {
+ error = EINVAL;
+ break;
+ }
+ if (tp->t_state != TCPS_LISTEN) {
+ error = EINVAL;
+ break;
+ }
+ if (optval) {
+ tp->t_flagsext |= TF_FASTOPEN;
+ } else {
+ tcp_disable_tfo(tp);
+ }
+ break;
+ case TCP_FASTOPEN_FORCE_HEURISTICS:
+
+ break;
+ case TCP_FASTOPEN_FORCE_ENABLE:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+
+ if (error) {
+ break;
+ }
+ if (optval < 0 || optval > 1) {
+ error = EINVAL;
+ break;
+ }
+
+ if (tp->t_state != TCPS_CLOSED) {
+ error = EINVAL;
+ break;
+ }
+ if (optval) {
+ tp->t_flagsext |= TF_FASTOPEN_FORCE_ENABLE;
+ } else {
+ tp->t_flagsext &= ~TF_FASTOPEN_FORCE_ENABLE;
+ }
+
+ break;
+ case TCP_ENABLE_ECN:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error) {
+ break;
+ }
+ if (optval) {
+ tp->ecn_flags |= TE_ECN_MODE_ENABLE;
+ tp->ecn_flags &= ~TE_ECN_MODE_DISABLE;
+ } else {
+ tp->ecn_flags &= ~TE_ECN_MODE_ENABLE;
+ tp->ecn_flags |= TE_ECN_MODE_DISABLE;
+ }
+ break;
+ case TCP_ECN_MODE:
+ error = sooptcopyin(sopt, &optval, sizeof optval,
+ sizeof optval);
+ if (error) {
+ break;
+ }
+ if (optval == ECN_MODE_DEFAULT) {
+ tp->ecn_flags &= ~TE_ECN_MODE_ENABLE;
+ tp->ecn_flags &= ~TE_ECN_MODE_DISABLE;
+ } else if (optval == ECN_MODE_ENABLE) {
+ tp->ecn_flags |= TE_ECN_MODE_ENABLE;
+ tp->ecn_flags &= ~TE_ECN_MODE_DISABLE;
+ } else if (optval == ECN_MODE_DISABLE) {
+ tp->ecn_flags &= ~TE_ECN_MODE_ENABLE;
+ tp->ecn_flags |= TE_ECN_MODE_DISABLE;
+ } else {
+ error = EINVAL;
+ }
+ break;
+ case TCP_NOTIFY_ACKNOWLEDGEMENT:
+ error = sooptcopyin(sopt, &optval,
+ sizeof(optval), sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval <= 0) {
+ error = EINVAL;
+ break;
+ }
+ if (tp->t_notify_ack_count >= TCP_MAX_NOTIFY_ACK) {
+ error = ETOOMANYREFS;
+ break;
+ }
+
+ /*
+ * validate that the given marker id is not
+ * a duplicate to avoid ambiguity
+ */
+ if ((error = tcp_notify_ack_id_valid(tp, so,
+ optval)) != 0) {
+ break;
+ }
+ error = tcp_add_notify_ack_marker(tp, optval);
+ break;
+ case SO_FLUSH:
+ if ((error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval))) != 0) {
+ break;
+ }
+
+ error = inp_flush(inp, optval);
+ break;
+
+ case SO_TRAFFIC_MGT_BACKGROUND:
+ if ((error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval))) != 0) {
+ break;
+ }
+
+ if (optval) {
+ socket_set_traffic_mgt_flags_locked(so,
+ TRAFFIC_MGT_SO_BACKGROUND);
+ } else {
+ socket_clear_traffic_mgt_flags_locked(so,
+ TRAFFIC_MGT_SO_BACKGROUND);
+ }
+ break;
+ case TCP_RXT_MINIMUM_TIMEOUT:
+ error = sooptcopyin(sopt, &optval, sizeof(optval),
+ sizeof(optval));
+ if (error) {
+ break;
+ }
+ if (optval < 0) {
+ error = EINVAL;
+ break;
+ }
+ if (optval == 0) {
+ tp->t_rxt_minimum_timeout = 0;
+ } else {
+ tp->t_rxt_minimum_timeout = min(optval,
+ TCP_RXT_MINIMUM_TIMEOUT_LIMIT);
+ /* convert to milliseconds */
+ tp->t_rxt_minimum_timeout *= TCP_RETRANSHZ;
+ }
+ break;
+ default:
+ error = ENOPROTOOPT;
+ break;
+ }
+ break;
+
+ case SOPT_GET:
+ switch (sopt->sopt_name) {
+ case TCP_NODELAY:
+ optval = tp->t_flags & TF_NODELAY;
+ break;
+ case TCP_MAXSEG:
+ optval = tp->t_maxseg;
+ break;
+ case TCP_KEEPALIVE:
+ if (tp->t_keepidle > 0) {
+ optval = tp->t_keepidle / TCP_RETRANSHZ;
+ } else {
+ optval = tcp_keepidle / TCP_RETRANSHZ;
+ }
+ break;
+ case TCP_KEEPINTVL:
+ if (tp->t_keepintvl > 0) {
+ optval = tp->t_keepintvl / TCP_RETRANSHZ;
+ } else {
+ optval = tcp_keepintvl / TCP_RETRANSHZ;
+ }
+ break;
+ case TCP_KEEPCNT:
+ if (tp->t_keepcnt > 0) {
+ optval = tp->t_keepcnt;
+ } else {
+ optval = tcp_keepcnt;
+ }
+ break;
+ case TCP_KEEPALIVE_OFFLOAD:
+ optval = !!(inp->inp_flags2 & INP2_KEEPALIVE_OFFLOAD);
+ break;
+ case TCP_NOOPT:
+ optval = tp->t_flags & TF_NOOPT;
+ break;
+ case TCP_NOPUSH:
+ optval = tp->t_flags & TF_NOPUSH;
+ break;
+ case TCP_ENABLE_ECN:
+ optval = (tp->ecn_flags & TE_ECN_MODE_ENABLE) ? 1 : 0;
+ break;
+ case TCP_ECN_MODE:
+ if (tp->ecn_flags & TE_ECN_MODE_ENABLE) {
+ optval = ECN_MODE_ENABLE;
+ } else if (tp->ecn_flags & TE_ECN_MODE_DISABLE) {
+ optval = ECN_MODE_DISABLE;
+ } else {
+ optval = ECN_MODE_DEFAULT;
+ }
+ 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->t_rxt_conndroptime / TCP_RETRANSHZ;
+ break;
+ case TCP_RXT_FINDROP:
+ optval = tp->t_flagsext & TF_RXTFINDROP;
+ break;
+ case TCP_NOTIMEWAIT:
+ optval = (tp->t_flagsext & TF_NOTIMEWAIT) ? 1 : 0;
+ break;
+ case TCP_FASTOPEN:
+ if (tp->t_state != TCPS_LISTEN ||
+ !(tcp_fastopen & TCP_FASTOPEN_SERVER)) {
+ error = ENOTSUP;
+ break;
+ }
+ optval = tfo_enabled(tp);
+ break;
+ case TCP_FASTOPEN_FORCE_HEURISTICS:
+ optval = 0;
+ break;
+ case TCP_FASTOPEN_FORCE_ENABLE:
+ optval = (tp->t_flagsext & TF_FASTOPEN_FORCE_ENABLE) ? 1 : 0;
+ 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_CONNECTION_INFO: {
+ struct tcp_connection_info tci;
+ tcp_connection_fill_info(tp, &tci);
+ error = sooptcopyout(sopt, &tci,
+ sizeof(struct tcp_connection_info));
+ goto done;
+ }
+ 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_ENABLE_MSGS:
+ if (so->so_flags & SOF_ENABLE_MSGS) {
+ optval = 1;
+ } else {
+ optval = 0;
+ }
+ break;
+ case TCP_SENDMOREACKS:
+ if (tp->t_flagsext & TF_NOSTRETCHACK) {
+ optval = 1;
+ } else {
+ optval = 0;
+ }
+ break;
+ case TCP_DISABLE_BLACKHOLE_DETECTION:
+ if (tp->t_flagsext & TF_NOBLACKHOLE_DETECTION) {
+ optval = 1;
+ } 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;
+ }
+ case TCP_ADAPTIVE_READ_TIMEOUT:
+ optval = tp->t_adaptive_rtimo;
+ break;
+ case TCP_ADAPTIVE_WRITE_TIMEOUT:
+ optval = tp->t_adaptive_wtimo;
+ break;
+ case SO_TRAFFIC_MGT_BACKGROUND:
+ optval = (so->so_flags1 &
+ SOF1_TRAFFIC_MGT_SO_BACKGROUND) ? 1 : 0;
+ break;
+ case TCP_NOTIFY_ACKNOWLEDGEMENT: {
+ struct tcp_notify_ack_complete retid;
+
+ if (sopt->sopt_valsize != sizeof(retid)) {
+ error = EINVAL;
+ break;
+ }
+ bzero(&retid, sizeof(retid));
+ tcp_get_notify_ack_count(tp, &retid);
+ if (retid.notify_complete_count > 0) {
+ tcp_get_notify_ack_ids(tp, &retid);
+ }
+
+ error = sooptcopyout(sopt, &retid, sizeof(retid));
+ goto done;
+ }
+ case TCP_RXT_MINIMUM_TIMEOUT:
+ optval = tp->t_rxt_minimum_timeout / TCP_RETRANSHZ;
+ break;
+ default:
+ error = ENOPROTOOPT;
+ break;
+ }
+ if (error == 0) {
+ error = sooptcopyout(sopt, &optval, sizeof optval);
+ }
+ break;
+ }
+done:
+ return error;
+}
+
+/*
+ * tcp_sendspace and tcp_recvspace are the default send and receive window
+ * sizes, respectively. These are obsolescent (this information should
+ * be set by the route).
+ */
+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,
+ int arg2, struct sysctl_req *req)
+{
+#pragma unused(arg2)
+ 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;
+ SYSCTL_SKMEM_UPDATE_AT_OFFSET(arg2, new_value);
+ } else {
+ error = ERANGE;
+ }
+ }
+ return error;
+}
+
+#if SYSCTL_SKMEM
+SYSCTL_PROC(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace,
+ CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &tcp_sendspace,
+ offsetof(skmem_sysctl, tcp.sendspace), 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,
+ offsetof(skmem_sysctl, tcp.recvspace), sysctl_tcp_sospace,
+ "IU", "Maximum incoming TCP datagram size");
+#else /* SYSCTL_SKMEM */
+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");
+#endif /* SYSCTL_SKMEM */
+
+/*
+ * 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(struct socket *so, struct proc *p)
+{
+ struct tcpcb *tp;
+ struct inpcb *inp;
+ int error;
+#if INET6
+ int isipv6 = SOCK_CHECK_DOM(so, PF_INET6) != 0;
+#endif
+
+ error = in_pcballoc(so, &tcbinfo, p);
+ if (error) {
+ return error;
+ }
+
+ inp = sotoinpcb(so);
+
+ if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) {
+ error = soreserve(so, tcp_sendspace, tcp_recvspace);
+ if (error) {
+ return error;
+ }
+ }
+
+ if (so->so_snd.sb_preconn_hiwat == 0) {
+ soreserve_preconnect(so, 2048);
+ }
+
+ 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) {
inp->inp_vflag |= INP_IPV6;
- inp->in6p_hops = -1; /* use kernel default */
- }
- else
+ inp->in6p_hops = -1; /* use kernel default */
+ } else
#endif /* INET6 */
inp->inp_vflag |= INP_IPV4;
tp = tcp_newtcpcb(inp);
- if (tp == 0) {
- int nofd = so->so_state & SS_NOFDREF; /* XXX */
+ if (tp == NULL) {
+ int nofd = so->so_state & SS_NOFDREF; /* XXX */
- so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */
+ so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */
#if INET6
- if (isipv6)
+ if (isipv6) {
in6_pcbdetach(inp);
- else
+ } else
#endif /* INET6 */
in_pcbdetach(inp);
so->so_state |= nofd;
- return (ENOBUFS);
+ return ENOBUFS;
+ }
+ if (nstat_collect) {
+ nstat_tcp_new_pcb(inp);
}
tp->t_state = TCPS_CLOSED;
- return (0);
+ return 0;
}
/*
* send segment to peer (with FIN).
*/
static struct tcpcb *
-tcp_disconnect(tp)
- register struct tcpcb *tp;
+tcp_disconnect(struct tcpcb *tp)
{
struct socket *so = tp->t_inpcb->inp_socket;
- if (tp->t_state < TCPS_ESTABLISHED)
+ if (so->so_rcv.sb_cc != 0 || tp->t_reassqlen != 0) {
+ return tcp_drop(tp, 0);
+ }
+
+ if (tp->t_state < TCPS_ESTABLISHED) {
tp = tcp_close(tp);
- else if ((so->so_options & SO_LINGER) && so->so_linger == 0)
+ } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) {
tp = tcp_drop(tp, 0);
- else {
+ } else {
soisdisconnecting(so);
sbflush(&so->so_rcv);
tp = tcp_usrclosed(tp);
- if (tp)
+#if MPTCP
+ /* A reset has been sent but socket exists, do not send FIN */
+ if ((so->so_flags & SOF_MP_SUBFLOW) &&
+ (tp) && (tp->t_mpflags & TMPF_RESET)) {
+ return tp;
+ }
+#endif
+ if (tp) {
(void) tcp_output(tp);
+ }
}
- return (tp);
+ return tp;
}
/*
* We can let the user exit from the close as soon as the FIN is acked.
*/
static struct tcpcb *
-tcp_usrclosed(tp)
- register struct tcpcb *tp;
+tcp_usrclosed(struct tcpcb *tp)
{
-
switch (tp->t_state) {
-
case TCPS_CLOSED:
case TCPS_LISTEN:
- tp->t_state = TCPS_CLOSED;
+ case TCPS_SYN_SENT:
tp = tcp_close(tp);
break;
- case TCPS_SYN_SENT:
case TCPS_SYN_RECEIVED:
tp->t_flags |= TF_NEEDFIN;
break;
case TCPS_ESTABLISHED:
+ DTRACE_TCP4(state__change, void, NULL,
+ struct inpcb *, tp->t_inpcb,
+ struct tcpcb *, tp,
+ int32_t, TCPS_FIN_WAIT_1);
tp->t_state = TCPS_FIN_WAIT_1;
+ TCP_LOG_CONNECTION_SUMMARY(tp);
break;
case TCPS_CLOSE_WAIT:
+ DTRACE_TCP4(state__change, void, NULL,
+ struct inpcb *, tp->t_inpcb,
+ struct tcpcb *, tp,
+ int32_t, TCPS_LAST_ACK);
tp->t_state = TCPS_LAST_ACK;
+ TCP_LOG_CONNECTION_SUMMARY(tp);
break;
}
if (tp && tp->t_state >= TCPS_FIN_WAIT_2) {
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;
+ if (tp->t_state == TCPS_FIN_WAIT_2) {
+ tp->t_timer[TCPT_2MSL] = OFFSET_FROM_START(tp,
+ TCP_CONN_MAXIDLE(tp));
+ }
+ }
+ return tp;
+}
+
+void
+tcp_in_cksum_stats(u_int32_t len)
+{
+ tcpstat.tcps_rcv_swcsum++;
+ tcpstat.tcps_rcv_swcsum_bytes += len;
+}
+
+void
+tcp_out_cksum_stats(u_int32_t len)
+{
+ tcpstat.tcps_snd_swcsum++;
+ tcpstat.tcps_snd_swcsum_bytes += len;
+}
+
+#if INET6
+void
+tcp_in6_cksum_stats(u_int32_t len)
+{
+ tcpstat.tcps_rcv6_swcsum++;
+ tcpstat.tcps_rcv6_swcsum_bytes += len;
+}
+
+void
+tcp_out6_cksum_stats(u_int32_t len)
+{
+ tcpstat.tcps_snd6_swcsum++;
+ tcpstat.tcps_snd6_swcsum_bytes += len;
+}
+#endif /* INET6 */
+
+/*
+ * When messages are enabled on a TCP socket, the message priority
+ * is sent as a control message. This function will extract it.
+ */
+int
+tcp_get_msg_priority(struct mbuf *control, uint32_t *msgpri)
+{
+ struct cmsghdr *cm;
+
+ if (control == NULL) {
+ return EINVAL;
+ }
+
+ for (cm = M_FIRST_CMSGHDR(control);
+ is_cmsg_valid(control, cm);
+ cm = M_NXT_CMSGHDR(control, cm)) {
+ if (cm->cmsg_level == SOL_SOCKET &&
+ cm->cmsg_type == SCM_MSG_PRIORITY) {
+ if (cm->cmsg_len != CMSG_LEN(sizeof(uint32_t))) {
+ return EINVAL;
+ }
+ *msgpri = *(uint32_t *)(void *)CMSG_DATA(cm);
+ if (*msgpri < MSG_PRI_MIN || *msgpri > MSG_PRI_MAX) {
+ return EINVAL;
+ }
+ break;
+ }
}
- return (tp);
+ return 0;
}
+int
+tcp_get_mpkl_send_info(struct mbuf *control,
+ struct so_mpkl_send_info *mpkl_send_info)
+{
+ struct cmsghdr *cm;
+
+ if (control == NULL || mpkl_send_info == NULL) {
+ return EINVAL;
+ }
+
+ for (cm = M_FIRST_CMSGHDR(control); cm;
+ cm = M_NXT_CMSGHDR(control, cm)) {
+ if (cm->cmsg_len < sizeof(struct cmsghdr) ||
+ cm->cmsg_len > control->m_len) {
+ return EINVAL;
+ }
+ if (cm->cmsg_level != SOL_SOCKET ||
+ cm->cmsg_type != SCM_MPKL_SEND_INFO) {
+ continue;
+ }
+ if (cm->cmsg_len != CMSG_LEN(sizeof(struct so_mpkl_send_info))) {
+ return EINVAL;
+ }
+ memcpy(mpkl_send_info, CMSG_DATA(cm),
+ sizeof(struct so_mpkl_send_info));
+ return 0;
+ }
+ return ENOMSG;
+}
projects / apple / xnu.git / blobdiff