/*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 1998-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_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 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.
*
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * 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.
+ * 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_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
-/* Copyright (c) 1998, 1999 Apple Computer, Inc. All Rights Reserved */
/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*
* Copyright (c) 1982, 1986, 1988, 1990, 1993
* SUCH DAMAGE.
*
* @(#)uipc_socket2.c 8.1 (Berkeley) 6/10/93
+ * $FreeBSD: src/sys/kern/uipc_socket2.c,v 1.55.2.9 2001/07/26 18:53:02 peter Exp $
+ */
+/*
+ * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
+ * support for mandatory and extensible security protections. This notice
+ * is included in support of clause 2.2 (b) of the Apple Public License,
+ * Version 2.0.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/domain.h>
#include <sys/kernel.h>
-#include <sys/proc.h>
+#include <sys/proc_internal.h>
+#include <sys/kauth.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/signalvar.h>
#include <sys/sysctl.h>
#include <sys/ev.h>
+#include <kern/locks.h>
+#include <net/route.h>
+#include <netinet/in.h>
+#include <netinet/in_pcb.h>
+#include <sys/kdebug.h>
+#include <libkern/OSAtomic.h>
+
+#if CONFIG_MACF
+#include <security/mac_framework.h>
+#endif
+
+/* TODO: this should be in a header file somewhere */
+extern void postevent(struct socket *, struct sockbuf *, int);
+
+#define DBG_FNC_SBDROP NETDBG_CODE(DBG_NETSOCK, 4)
+#define DBG_FNC_SBAPPEND NETDBG_CODE(DBG_NETSOCK, 5)
+
+static inline void sbcompress(struct sockbuf *, struct mbuf *, struct mbuf *);
+static struct socket *sonewconn_internal(struct socket *, int);
+static int sbappendaddr_internal(struct sockbuf *, struct sockaddr *,
+ struct mbuf *, struct mbuf *);
+static int sbappendcontrol_internal(struct sockbuf *, struct mbuf *,
+ struct mbuf *);
/*
* Primitive routines for operating on sockets and socket buffers
*/
+static int soqlimitcompat = 1;
+static int soqlencomp = 0;
u_long sb_max = SB_MAX; /* XXX should be static */
static u_long sb_efficiency = 8; /* parameter for sbreserve() */
-
-char netcon[] = "netcon";
+__private_extern__ unsigned int total_mb_cnt = 0;
+__private_extern__ unsigned int total_cl_cnt = 0;
+__private_extern__ int sbspace_factor = 8;
/*
* Procedures to manipulate state flags of socket
* called during processing of connect() call,
* resulting in an eventual call to soisconnected() if/when the
* connection is established. When the connection is torn down
- * soisdisconnecting() is called during processing of disconnect() call,
+ * soisdisconnecting() is called during processing of disconnect() call,
* and soisdisconnected() is called when the connection to the peer
* is totally severed. The semantics of these routines are such that
* connectionless protocols can call soisconnected() and soisdisconnected()
* From the passive side, a socket is created with
* two queues of sockets: so_incomp for connections in progress
* and so_comp for connections already made and awaiting user acceptance.
- * As a protocol is preparing incoming connections, it creates a socket
+ * As a protocol is preparing incoming connections, it creates a socket
* structure queued on so_incomp by calling sonewconn(). When the connection
* is established, soisconnected() is called, and transfers the
* socket structure to so_comp, making it available to accept().
*
- * If a socket is closed with sockets on either
+ * If a socket is closed with sockets on either
* so_incomp or so_comp, these sockets are dropped.
- *
+ *
* If higher level protocols are implemented in
* the kernel, the wakeups done here will sometimes
* cause software-interrupt process scheduling.
*/
-
void
-soisconnecting(so)
- register struct socket *so;
+soisconnecting(struct socket *so)
{
so->so_state &= ~(SS_ISCONNECTED|SS_ISDISCONNECTING);
so->so_state |= SS_ISCONNECTING;
+
+ sflt_notify(so, sock_evt_connecting, NULL);
}
void
-soisconnected(so)
- register struct socket *so;
-{ register struct kextcb *kp;
- register struct socket *head = so->so_head;
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_soisconnected)
- { if ((*kp->e_soif->sf_soisconnected)(so, kp))
- return;
- }
- kp = kp->e_next;
- }
+soisconnected(struct socket *so)
+{
+ struct socket *head = so->so_head;
so->so_state &= ~(SS_ISCONNECTING|SS_ISDISCONNECTING|SS_ISCONFIRMING);
so->so_state |= SS_ISCONNECTED;
+
+ sflt_notify(so, sock_evt_connected, NULL);
+
if (head && (so->so_state & SS_INCOMP)) {
- postevent(head,0,EV_RCONN);
+ so->so_state &= ~SS_INCOMP;
+ so->so_state |= SS_COMP;
+ if (head->so_proto->pr_getlock != NULL) {
+ socket_unlock(so, 0);
+ socket_lock(head, 1);
+ }
+ postevent(head, 0, EV_RCONN);
TAILQ_REMOVE(&head->so_incomp, so, so_list);
head->so_incqlen--;
- so->so_state &= ~SS_INCOMP;
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
- so->so_state |= SS_COMP;
sorwakeup(head);
- wakeup((caddr_t)&head->so_timeo);
+ wakeup_one((caddr_t)&head->so_timeo);
+ if (head->so_proto->pr_getlock != NULL) {
+ socket_unlock(head, 1);
+ socket_lock(so, 0);
+ }
} else {
- postevent(so,0,EV_WCONN);
+ postevent(so, 0, EV_WCONN);
wakeup((caddr_t)&so->so_timeo);
sorwakeup(so);
sowwakeup(so);
}
void
-soisdisconnecting(so)
- register struct socket *so;
-{ register struct kextcb *kp;
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_soisdisconnecting)
- { if ((*kp->e_soif->sf_soisdisconnecting)(so, kp))
- return;
- }
- kp = kp->e_next;
- }
-
+soisdisconnecting(struct socket *so)
+{
so->so_state &= ~SS_ISCONNECTING;
so->so_state |= (SS_ISDISCONNECTING|SS_CANTRCVMORE|SS_CANTSENDMORE);
+ sflt_notify(so, sock_evt_disconnecting, NULL);
wakeup((caddr_t)&so->so_timeo);
sowwakeup(so);
sorwakeup(so);
}
void
-soisdisconnected(so)
- register struct socket *so;
-{ register struct kextcb *kp;
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_soisdisconnected)
- { if ((*kp->e_soif->sf_soisdisconnected)(so, kp))
- return;
- }
- kp = kp->e_next;
- }
-
+soisdisconnected(struct socket *so)
+{
so->so_state &= ~(SS_ISCONNECTING|SS_ISCONNECTED|SS_ISDISCONNECTING);
- so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE);
+ so->so_state |= (SS_CANTRCVMORE|SS_CANTSENDMORE|SS_ISDISCONNECTED);
+ sflt_notify(so, sock_evt_disconnected, NULL);
wakeup((caddr_t)&so->so_timeo);
sowwakeup(so);
sorwakeup(so);
}
-/*
- * Return a random connection that hasn't been serviced yet and
- * is eligible for discard. There is a one in qlen chance that
- * we will return a null, saying that there are no dropable
- * requests. In this case, the protocol specific code should drop
- * the new request. This insures fairness.
- *
- * This may be used in conjunction with protocol specific queue
- * congestion routines.
- */
-struct socket *
-sodropablereq(head)
- register struct socket *head;
-{
- register struct socket *so;
- unsigned int i, j, qlen;
- static int rnd;
- static struct timeval old_runtime;
- static unsigned int cur_cnt, old_cnt;
- struct timeval tv;
-
- microtime(&tv);
- if ((i = (tv.tv_sec - old_runtime.tv_sec)) != 0) {
- old_runtime = tv;
- old_cnt = cur_cnt / i;
- cur_cnt = 0;
- }
-
- so = TAILQ_FIRST(&head->so_incomp);
- if (!so)
- return (so);
-
- qlen = head->so_incqlen;
- if (++cur_cnt > qlen || old_cnt > qlen) {
- rnd = (314159 * rnd + 66329) & 0xffff;
- j = ((qlen + 1) * rnd) >> 16;
-
- while (j-- && so)
- so = TAILQ_NEXT(so, so_list);
- }
-
- return (so);
-}
-
/*
* When an attempt at a new connection is noted on a socket
* which accepts connections, sonewconn is called. If the
* data structure of the original socket, and return this.
* Connstatus may be 0, or SO_ISCONFIRMING, or SO_ISCONNECTED.
*/
-struct socket *
-sonewconn(head, connstatus)
- register struct socket *head;
- int connstatus;
-{ int error = 0;
- register struct socket *so;
- register struct kextcb *kp;
-
- if (head->so_qlen > 3 * head->so_qlimit / 2)
+static struct socket *
+sonewconn_internal(struct socket *head, int connstatus)
+{
+ int so_qlen, error = 0;
+ struct socket *so;
+ lck_mtx_t *mutex_held;
+
+ if (head->so_proto->pr_getlock != NULL)
+ mutex_held = (*head->so_proto->pr_getlock)(head, 0);
+ else
+ mutex_held = head->so_proto->pr_domain->dom_mtx;
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+
+ if (!soqlencomp) {
+ /*
+ * This is the default case; so_qlen represents the
+ * sum of both incomplete and completed queues.
+ */
+ so_qlen = head->so_qlen;
+ } else {
+ /*
+ * When kern.ipc.soqlencomp is set to 1, so_qlen
+ * represents only the completed queue. Since we
+ * cannot let the incomplete queue goes unbounded
+ * (in case of SYN flood), we cap the incomplete
+ * queue length to at most somaxconn, and use that
+ * as so_qlen so that we fail immediately below.
+ */
+ so_qlen = head->so_qlen - head->so_incqlen;
+ if (head->so_incqlen > somaxconn)
+ so_qlen = somaxconn;
+ }
+
+ if (so_qlen >=
+ (soqlimitcompat ? head->so_qlimit : (3 * head->so_qlimit / 2)))
return ((struct socket *)0);
- so = soalloc(0, head->so_proto->pr_domain->dom_family, head->so_type);
+ so = soalloc(M_NOWAIT, head->so_proto->pr_domain->dom_family,
+ head->so_type);
if (so == NULL)
return ((struct socket *)0);
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_sonewconn1)
- { if ((*kp->e_soif->sf_sonewconn1)(so, connstatus, kp))
- return;
- }
- kp = kp->e_next;
+ /* check if head was closed during the soalloc */
+ if (head->so_proto == NULL) {
+ sodealloc(so);
+ return ((struct socket *)0);
}
so->so_head = head;
so->so_timeo = head->so_timeo;
so->so_pgid = head->so_pgid;
so->so_uid = head->so_uid;
+ so->so_flags = head->so_flags & (SOF_REUSESHAREUID|SOF_NOTIFYCONFLICT); /* inherit SO_REUSESHAREUID and SO_NOTIFYCONFLICT ocket options */
+ so->so_usecount = 1;
+ so->next_lock_lr = 0;
+ so->next_unlock_lr = 0;
+
+#ifdef __APPLE__
so->so_rcv.sb_flags |= SB_RECV; /* XXX */
- (void) soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat);
+ so->so_rcv.sb_so = so->so_snd.sb_so = so;
+ TAILQ_INIT(&so->so_evlist);
+#endif
+
+#if CONFIG_MACF_SOCKET
+ mac_socket_label_associate_accept(head, so);
+#endif
+
+ if (soreserve(so, head->so_snd.sb_hiwat, head->so_rcv.sb_hiwat)) {
+ sflt_termsock(so);
+ sodealloc(so);
+ return ((struct socket *)0);
+ }
- if (so->so_proto->pr_sfilter.tqh_first)
- error = sfilter_init(so);
- if (error == 0 && (*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL)) {
- sfilter_term(so);
+ /*
+ * Must be done with head unlocked to avoid deadlock
+ * for protocol with per socket mutexes.
+ */
+ if (head->so_proto->pr_unlock)
+ socket_unlock(head, 0);
+ if (((*so->so_proto->pr_usrreqs->pru_attach)(so, 0, NULL) != 0) ||
+ error) {
+ sflt_termsock(so);
sodealloc(so);
+ if (head->so_proto->pr_unlock)
+ socket_lock(head, 0);
return ((struct socket *)0);
}
+ if (head->so_proto->pr_unlock)
+ socket_lock(head, 0);
+#ifdef __APPLE__
so->so_proto->pr_domain->dom_refs++;
+#endif
if (connstatus) {
TAILQ_INSERT_TAIL(&head->so_comp, so, so_list);
head->so_incqlen++;
}
head->so_qlen++;
+
+#ifdef __APPLE__
+ /* Attach socket filters for this protocol */
+ sflt_initsock(so);
+#endif
+
if (connstatus) {
+ so->so_state |= connstatus;
sorwakeup(head);
wakeup((caddr_t)&head->so_timeo);
- so->so_state |= connstatus;
}
- so->so_rcv.sb_so = so->so_snd.sb_so = so;
- TAILQ_INIT(&so->so_evlist);
return (so);
}
+
+struct socket *
+sonewconn(struct socket *head, int connstatus, const struct sockaddr *from)
+{
+ int error = 0;
+ struct socket_filter_entry *filter;
+ int filtered = 0;
+
+ for (filter = head->so_filt; filter && (error == 0);
+ filter = filter->sfe_next_onsocket) {
+ if (filter->sfe_filter->sf_filter.sf_connect_in) {
+ if (filtered == 0) {
+ filtered = 1;
+ sflt_use(head);
+ socket_unlock(head, 0);
+ }
+ error = filter->sfe_filter->sf_filter.
+ sf_connect_in(filter->sfe_cookie, head, from);
+ }
+ }
+ if (filtered != 0) {
+ socket_lock(head, 0);
+ sflt_unuse(head);
+ }
+
+ if (error) {
+ return (NULL);
+ }
+
+ return (sonewconn_internal(head, connstatus));
+}
+
/*
* Socantsendmore indicates that no more data will be sent on the
* socket; it would normally be applied to a socket when the user
*/
void
-socantsendmore(so)
- struct socket *so;
-{ register struct kextcb *kp;
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_socantsendmore)
- { if ((*kp->e_soif->sf_socantsendmore)(so, kp))
- return;
- }
- kp = kp->e_next;
- }
-
-
+socantsendmore(struct socket *so)
+{
so->so_state |= SS_CANTSENDMORE;
+ sflt_notify(so, sock_evt_cantsendmore, NULL);
sowwakeup(so);
}
void
-socantrcvmore(so)
- struct socket *so;
-{ register struct kextcb *kp;
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_socantrcvmore)
- { if ((*kp->e_soif->sf_socantrcvmore)(so, kp))
- return;
- }
- kp = kp->e_next;
- }
-
-
+socantrcvmore(struct socket *so)
+{
so->so_state |= SS_CANTRCVMORE;
+ sflt_notify(so, sock_evt_cantrecvmore, NULL);
sorwakeup(so);
}
/*
* Wait for data to arrive at/drain from a socket buffer.
+ *
+ * Returns: 0 Success
+ * EBADF
+ * msleep:EINTR
*/
int
-sbwait(sb)
- struct sockbuf *sb;
+sbwait(struct sockbuf *sb)
{
+ int error = 0, lr_saved;
+ struct socket *so = sb->sb_so;
+ lck_mtx_t *mutex_held;
+ struct timespec ts;
+
+ lr_saved = (unsigned int) __builtin_return_address(0);
+
+ if (so->so_proto->pr_getlock != NULL)
+ mutex_held = (*so->so_proto->pr_getlock)(so, 0);
+ else
+ mutex_held = so->so_proto->pr_domain->dom_mtx;
sb->sb_flags |= SB_WAIT;
- return (tsleep((caddr_t)&sb->sb_cc,
- (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sbwait",
- sb->sb_timeo));
+
+ if (so->so_usecount < 1)
+ panic("sbwait: so=%p refcount=%d\n", so, so->so_usecount);
+ ts.tv_sec = sb->sb_timeo.tv_sec;
+ ts.tv_nsec = sb->sb_timeo.tv_usec * 1000;
+ error = msleep((caddr_t)&sb->sb_cc, mutex_held,
+ (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH, "sbwait", &ts);
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+
+ if (so->so_usecount < 1)
+ panic("sbwait: so=%p refcount=%d\n", so, so->so_usecount);
+
+ if ((so->so_state & SS_DRAINING)) {
+ error = EBADF;
+ }
+
+ return (error);
}
/*
* Lock a sockbuf already known to be locked;
* return any error returned from sleep (EINTR).
+ *
+ * Returns: 0 Success
+ * EINTR
*/
int
-sb_lock(sb)
- register struct sockbuf *sb;
+sb_lock(struct sockbuf *sb)
{
- int error;
+ struct socket *so = sb->sb_so;
+ lck_mtx_t *mutex_held;
+ int error = 0;
+
+ if (so == NULL)
+ panic("sb_lock: null so back pointer sb=%p\n", sb);
while (sb->sb_flags & SB_LOCK) {
sb->sb_flags |= SB_WANT;
- error = tsleep((caddr_t)&sb->sb_flags,
- (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK|PCATCH,
- "sblock", 0);
+ if (so->so_proto->pr_getlock != NULL)
+ mutex_held = (*so->so_proto->pr_getlock)(so, 0);
+ else
+ mutex_held = so->so_proto->pr_domain->dom_mtx;
+ if (so->so_usecount < 1)
+ panic("sb_lock: so=%p refcount=%d\n", so,
+ so->so_usecount);
+
+ error = msleep((caddr_t)&sb->sb_flags, mutex_held,
+ (sb->sb_flags & SB_NOINTR) ? PSOCK : PSOCK | PCATCH,
+ "sb_lock", 0);
+ if (so->so_usecount < 1)
+ panic("sb_lock: 2 so=%p refcount=%d\n", so,
+ so->so_usecount);
if (error)
return (error);
}
* if the socket has the SS_ASYNC flag set.
*/
void
-sowakeup(so, sb)
- register struct socket *so;
- register struct sockbuf *sb;
+sowakeup(struct socket *so, struct sockbuf *sb)
{
- struct proc *p = current_proc();
-
-
-
- thread_funnel_switch(NETWORK_FUNNEL, KERNEL_FUNNEL);
- sb->sb_sel.si_flags &= ~SI_SBSEL;
+ sb->sb_flags &= ~SB_SEL;
selwakeup(&sb->sb_sel);
- thread_funnel_switch(KERNEL_FUNNEL, NETWORK_FUNNEL);
-
if (sb->sb_flags & SB_WAIT) {
sb->sb_flags &= ~SB_WAIT;
wakeup((caddr_t)&sb->sb_cc);
if (so->so_state & SS_ASYNC) {
if (so->so_pgid < 0)
gsignal(-so->so_pgid, SIGIO);
- else if (so->so_pgid > 0 && (p = pfind(so->so_pgid)) != 0)
- psignal(p, SIGIO);
+ else if (so->so_pgid > 0)
+ proc_signal(so->so_pgid, SIGIO);
+ }
+ if (sb->sb_flags & SB_KNOTE) {
+ KNOTE(&sb->sb_sel.si_note, SO_FILT_HINT_LOCKED);
+ }
+ if (sb->sb_flags & SB_UPCALL) {
+ void (*so_upcall)(struct socket *, caddr_t, int);
+ caddr_t so_upcallarg;
+
+ so_upcall = so->so_upcall;
+ so_upcallarg = so->so_upcallarg;
+ /* Let close know that we're about to do an upcall */
+ so->so_flags |= SOF_UPCALLINUSE;
+
+ socket_unlock(so, 0);
+ (*so_upcall)(so, so_upcallarg, M_DONTWAIT);
+ socket_lock(so, 0);
+
+ so->so_flags &= ~SOF_UPCALLINUSE;
+ /* Tell close that it's safe to proceed */
+ if (so->so_flags & SOF_CLOSEWAIT)
+ wakeup((caddr_t)&so->so_upcall);
}
-
- if (sb->sb_flags & SB_UPCALL)
- (*so->so_upcall)(so, so->so_upcallarg, M_DONTWAIT);
}
/*
* should be released by calling sbrelease() when the socket is destroyed.
*/
+/*
+ * Returns: 0 Success
+ * ENOBUFS
+ */
int
-soreserve(so, sndcc, rcvcc)
- register struct socket *so;
- u_long sndcc, rcvcc;
+soreserve(struct socket *so, u_long sndcc, u_long rcvcc)
{
- register struct kextcb *kp;
-
- kp = sotokextcb(so);
- while (kp)
- { if (kp->e_soif && kp->e_soif->sf_soreserve)
- { if ((*kp->e_soif->sf_soreserve)(so, sndcc, rcvcc, kp))
- return;
- }
- kp = kp->e_next;
- }
if (sbreserve(&so->so_snd, sndcc) == 0)
goto bad;
so->so_snd.sb_lowat = so->so_snd.sb_hiwat;
return (0);
bad2:
+#ifdef __APPLE__
+ selthreadclear(&so->so_snd.sb_sel);
+#endif
sbrelease(&so->so_snd);
bad:
return (ENOBUFS);
* if buffering efficiency is near the normal case.
*/
int
-sbreserve(sb, cc)
- struct sockbuf *sb;
- u_long cc;
+sbreserve(struct sockbuf *sb, u_long cc)
{
if ((u_quad_t)cc > (u_quad_t)sb_max * MCLBYTES / (MSIZE + MCLBYTES))
return (0);
/*
* Free mbufs held by a socket, and reserved mbuf space.
*/
+/* WARNING needs to do selthreadclear() before calling this */
void
-sbrelease(sb)
- struct sockbuf *sb;
+sbrelease(struct sockbuf *sb)
{
-
sbflush(sb);
- sb->sb_hiwat = sb->sb_mbmax = 0;
-
- {
- int oldpri = splimp();
- selthreadclear(&sb->sb_sel);
- splx(oldpri);
- }
+ sb->sb_hiwat = 0;
+ sb->sb_mbmax = 0;
}
/*
* the mbuf chain is recorded in sb. Empty mbufs are
* discarded and mbufs are compacted where possible.
*/
-void
-sbappend(sb, m)
- struct sockbuf *sb;
- struct mbuf *m;
-{ register struct kextcb *kp;
- register struct mbuf *n;
+int
+sbappend(struct sockbuf *sb, struct mbuf *m)
+{
+ struct socket *so = sb->sb_so;
- if (m == 0)
- return;
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbappend)
- { if ((*kp->e_sout->su_sbappend)(sb, m, kp))
- return;
+ if (m == NULL || (sb->sb_flags & SB_DROP)) {
+ if (m != NULL)
+ m_freem(m);
+ return (0);
+ }
+
+ SBLASTRECORDCHK(sb, "sbappend 1");
+
+ if (sb->sb_lastrecord != NULL && (sb->sb_mbtail->m_flags & M_EOR))
+ return (sbappendrecord(sb, m));
+
+ if (sb->sb_flags & SB_RECV) {
+ int error = sflt_data_in(so, NULL, &m, NULL, 0, NULL);
+ SBLASTRECORDCHK(sb, "sbappend 2");
+ if (error != 0) {
+ if (error != EJUSTRETURN)
+ m_freem(m);
+ return (0);
}
- kp = kp->e_next;
}
- if (n = sb->sb_mb) {
- while (n->m_nextpkt)
- n = n->m_nextpkt;
- do {
- if (n->m_flags & M_EOR) {
- sbappendrecord(sb, m); /* XXXXXX!!!! */
- return;
- }
- } while (n->m_next && (n = n->m_next));
+ /* If this is the first record, it's also the last record */
+ if (sb->sb_lastrecord == NULL)
+ sb->sb_lastrecord = m;
+
+ sbcompress(sb, m, sb->sb_mbtail);
+ SBLASTRECORDCHK(sb, "sbappend 3");
+ return (1);
+}
+
+/*
+ * Similar to sbappend, except that this is optimized for stream sockets.
+ */
+int
+sbappendstream(struct sockbuf *sb, struct mbuf *m)
+{
+ struct socket *so = sb->sb_so;
+
+ if (m->m_nextpkt != NULL || (sb->sb_mb != sb->sb_lastrecord))
+ panic("sbappendstream: nexpkt %p || mb %p != lastrecord %p\n",
+ m->m_nextpkt, sb->sb_mb, sb->sb_lastrecord);
+
+ SBLASTMBUFCHK(sb, __func__);
+
+ if (m == NULL || (sb->sb_flags & SB_DROP)) {
+ if (m != NULL)
+ m_freem(m);
+ return (0);
+ }
+
+ if (sb->sb_flags & SB_RECV) {
+ int error = sflt_data_in(so, NULL, &m, NULL, 0, NULL);
+ SBLASTRECORDCHK(sb, "sbappendstream 1");
+ if (error != 0) {
+ if (error != EJUSTRETURN)
+ m_freem(m);
+ return (0);
+ }
}
- sbcompress(sb, m, n);
+
+ sbcompress(sb, m, sb->sb_mbtail);
+ sb->sb_lastrecord = sb->sb_mb;
+ SBLASTRECORDCHK(sb, "sbappendstream 2");
+ return (1);
}
#ifdef SOCKBUF_DEBUG
void
-sbcheck(sb)
- register struct sockbuf *sb;
+sbcheck(struct sockbuf *sb)
{
- register struct mbuf *m;
- register struct mbuf *n = 0;
- register u_long len = 0, mbcnt = 0;
+ struct mbuf *m;
+ struct mbuf *n = 0;
+ u_long len = 0, mbcnt = 0;
+ lck_mtx_t *mutex_held;
+
+ if (sb->sb_so->so_proto->pr_getlock != NULL)
+ mutex_held = (*sb->sb_so->so_proto->pr_getlock)(sb->sb_so, 0);
+ else
+ mutex_held = sb->sb_so->so_proto->pr_domain->dom_mtx;
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+
+ if (sbchecking == 0)
+ return;
for (m = sb->sb_mb; m; m = n) {
- n = m->m_nextpkt;
- for (; m; m = m->m_next) {
- len += m->m_len;
- mbcnt += MSIZE;
- if (m->m_flags & M_EXT) /*XXX*/ /* pretty sure this is bogus */
- mbcnt += m->m_ext.ext_size;
- if (m->m_nextpkt)
- panic("sbcheck nextpkt");
+ n = m->m_nextpkt;
+ for (; m; m = m->m_next) {
+ len += m->m_len;
+ mbcnt += MSIZE;
+ /* XXX pretty sure this is bogus */
+ if (m->m_flags & M_EXT)
+ mbcnt += m->m_ext.ext_size;
+ }
}
if (len != sb->sb_cc || mbcnt != sb->sb_mbcnt) {
- printf("cc %ld != %ld || mbcnt %ld != %ld\n", len, sb->sb_cc,
+ panic("cc %ld != %ld || mbcnt %ld != %ld\n", len, sb->sb_cc,
mbcnt, sb->sb_mbcnt);
- panic("sbcheck");
}
}
#endif
+void
+sblastrecordchk(struct sockbuf *sb, const char *where)
+{
+ struct mbuf *m = sb->sb_mb;
+
+ while (m && m->m_nextpkt)
+ m = m->m_nextpkt;
+
+ if (m != sb->sb_lastrecord) {
+ printf("sblastrecordchk: mb %p lastrecord %p last %p\n",
+ sb->sb_mb, sb->sb_lastrecord, m);
+ printf("packet chain:\n");
+ for (m = sb->sb_mb; m != NULL; m = m->m_nextpkt)
+ printf("\t%p\n", m);
+ panic("sblastrecordchk from %s", where);
+ }
+}
+
+void
+sblastmbufchk(struct sockbuf *sb, const char *where)
+{
+ struct mbuf *m = sb->sb_mb;
+ struct mbuf *n;
+
+ while (m && m->m_nextpkt)
+ m = m->m_nextpkt;
+
+ while (m && m->m_next)
+ m = m->m_next;
+
+ if (m != sb->sb_mbtail) {
+ printf("sblastmbufchk: mb %p mbtail %p last %p\n",
+ sb->sb_mb, sb->sb_mbtail, m);
+ printf("packet tree:\n");
+ for (m = sb->sb_mb; m != NULL; m = m->m_nextpkt) {
+ printf("\t");
+ for (n = m; n != NULL; n = n->m_next)
+ printf("%p ", n);
+ printf("\n");
+ }
+ panic("sblastmbufchk from %s", where);
+ }
+}
+
/*
- * As above, except the mbuf chain
- * begins a new record.
+ * Similar to sbappend, except the mbuf chain begins a new record.
*/
-void
-sbappendrecord(sb, m0)
- register struct sockbuf *sb;
- register struct mbuf *m0;
+int
+sbappendrecord(struct sockbuf *sb, struct mbuf *m0)
{
- register struct mbuf *m;
- register struct kextcb *kp;
-
- if (m0 == 0)
- return;
-
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbappendrecord)
- { if ((*kp->e_sout->su_sbappendrecord)(sb, m0, kp))
- return;
+ struct mbuf *m;
+ int space = 0;
+
+ if (m0 == NULL || (sb->sb_flags & SB_DROP)) {
+ if (m0 != NULL)
+ m_freem(m0);
+ return (0);
+ }
+
+ for (m = m0; m != NULL; m = m->m_next)
+ space += m->m_len;
+
+ if (space > sbspace(sb) && !(sb->sb_flags & SB_UNIX)) {
+ m_freem(m0);
+ return (0);
+ }
+
+ if (sb->sb_flags & SB_RECV) {
+ int error = sflt_data_in(sb->sb_so, NULL, &m0, NULL,
+ sock_data_filt_flag_record, NULL);
+ if (error != 0) {
+ SBLASTRECORDCHK(sb, "sbappendrecord 1");
+ if (error != EJUSTRETURN)
+ m_freem(m0);
+ return (0);
}
- kp = kp->e_next;
}
-
- m = sb->sb_mb;
- if (m)
- while (m->m_nextpkt)
- m = m->m_nextpkt;
+
/*
- * Put the first mbuf on the queue.
* Note this permits zero length records.
*/
sballoc(sb, m0);
- if (m)
- m->m_nextpkt = m0;
- else
+ SBLASTRECORDCHK(sb, "sbappendrecord 2");
+ if (sb->sb_lastrecord != NULL) {
+ sb->sb_lastrecord->m_nextpkt = m0;
+ } else {
sb->sb_mb = m0;
+ }
+ sb->sb_lastrecord = m0;
+ sb->sb_mbtail = m0;
+
m = m0->m_next;
m0->m_next = 0;
if (m && (m0->m_flags & M_EOR)) {
m->m_flags |= M_EOR;
}
sbcompress(sb, m, m0);
+ SBLASTRECORDCHK(sb, "sbappendrecord 3");
+ return (1);
}
/*
* is inserted at the beginning of the sockbuf,
* but after any other OOB data.
*/
-void
-sbinsertoob(sb, m0)
- register struct sockbuf *sb;
- register struct mbuf *m0;
+int
+sbinsertoob(struct sockbuf *sb, struct mbuf *m0)
{
- register struct mbuf *m;
- register struct mbuf **mp;
- register struct kextcb *kp;
+ struct mbuf *m;
+ struct mbuf **mp;
if (m0 == 0)
- return;
-
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbinsertoob)
- { if ((*kp->e_sout->su_sbinsertoob)(sb, m0, kp))
- return;
+ return (0);
+
+ SBLASTRECORDCHK(sb, "sbinsertoob 1");
+
+ if ((sb->sb_flags & SB_RECV) != 0) {
+ int error = sflt_data_in(sb->sb_so, NULL, &m0, NULL,
+ sock_data_filt_flag_oob, NULL);
+
+ SBLASTRECORDCHK(sb, "sbinsertoob 2");
+ if (error) {
+ if (error != EJUSTRETURN) {
+ m_freem(m0);
+ }
+ return (0);
}
- kp = kp->e_next;
}
-
- for (mp = &sb->sb_mb; *mp ; mp = &((*mp)->m_nextpkt)) {
- m = *mp;
- again:
+
+ for (mp = &sb->sb_mb; *mp; mp = &((*mp)->m_nextpkt)) {
+ m = *mp;
+again:
switch (m->m_type) {
case MT_OOBDATA:
*/
sballoc(sb, m0);
m0->m_nextpkt = *mp;
+ if (*mp == NULL) {
+ /* m0 is actually the new tail */
+ sb->sb_lastrecord = m0;
+ }
*mp = m0;
m = m0->m_next;
m0->m_next = 0;
m->m_flags |= M_EOR;
}
sbcompress(sb, m, m0);
+ SBLASTRECORDCHK(sb, "sbinsertoob 3");
+ return (1);
}
/*
* to the receive queue of a socket. If present,
* m0 must include a packet header with total length.
* Returns 0 if no space in sockbuf or insufficient mbufs.
+ *
+ * Returns: 0 No space/out of mbufs
+ * 1 Success
*/
-int
-sbappendaddr(sb, asa, m0, control)
- register struct sockbuf *sb;
- struct sockaddr *asa;
- struct mbuf *m0, *control;
+static int
+sbappendaddr_internal(struct sockbuf *sb, struct sockaddr *asa,
+ struct mbuf *m0, struct mbuf *control)
{
- register struct mbuf *m, *n;
+ struct mbuf *m, *n, *nlast;
int space = asa->sa_len;
- register struct kextcb *kp;
if (m0 && (m0->m_flags & M_PKTHDR) == 0)
panic("sbappendaddr");
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbappendaddr)
- { if ((*kp->e_sout->su_sbappendaddr)(sb, asa, m0, control, kp))
- return 0;
- }
- kp = kp->e_next;
- }
-
if (m0)
space += m0->m_pkthdr.len;
for (n = control; n; n = n->m_next) {
else
control = m0;
m->m_next = control;
- for (n = m; n; n = n->m_next)
+
+ SBLASTRECORDCHK(sb, "sbappendadddr 1");
+
+ for (n = m; n->m_next != NULL; n = n->m_next)
sballoc(sb, n);
- n = sb->sb_mb;
- if (n) {
- while (n->m_nextpkt)
- n = n->m_nextpkt;
- n->m_nextpkt = m;
- } else
+ sballoc(sb, n);
+ nlast = n;
+
+ if (sb->sb_lastrecord != NULL) {
+ sb->sb_lastrecord->m_nextpkt = m;
+ } else {
sb->sb_mb = m;
- postevent(0,sb,EV_RWBYTES);
+ }
+ sb->sb_lastrecord = m;
+ sb->sb_mbtail = nlast;
+
+ SBLASTMBUFCHK(sb, __func__);
+ SBLASTRECORDCHK(sb, "sbappendadddr 2");
+
+ postevent(0, sb, EV_RWBYTES);
return (1);
}
+/*
+ * Returns: 0 Error: No space/out of mbufs/etc.
+ * 1 Success
+ *
+ * Imputed: (*error_out) errno for error
+ * ENOBUFS
+ * sflt_data_in:??? [whatever a filter author chooses]
+ */
int
-sbappendcontrol(sb, m0, control)
- struct sockbuf *sb;
- struct mbuf *control, *m0;
+sbappendaddr(struct sockbuf *sb, struct sockaddr *asa, struct mbuf *m0,
+ struct mbuf *control, int *error_out)
{
- register struct mbuf *m, *n;
- int space = 0;
- register struct kextcb *kp;
+ int result = 0;
+ boolean_t sb_unix = (sb->sb_flags & SB_UNIX);
- if (control == 0)
- panic("sbappendcontrol");
+ if (error_out)
+ *error_out = 0;
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbappendcontrol)
- { if ((*kp->e_sout->su_sbappendcontrol)(sb, m0, control, kp))
- return 0;
+ if (m0 && (m0->m_flags & M_PKTHDR) == 0)
+ panic("sbappendaddrorfree");
+
+ if (sb->sb_flags & SB_DROP) {
+ if (m0 != NULL)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out != NULL)
+ *error_out = EINVAL;
+ return (0);
+ }
+
+ /* Call socket data in filters */
+ if ((sb->sb_flags & SB_RECV) != 0) {
+ int error;
+ error = sflt_data_in(sb->sb_so, asa, &m0, &control, 0, NULL);
+ SBLASTRECORDCHK(sb, __func__);
+ if (error) {
+ if (error != EJUSTRETURN) {
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = error;
+ }
+ return (0);
}
- kp = kp->e_next;
}
+ result = sbappendaddr_internal(sb, asa, m0, control);
+ if (result == 0) {
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = ENOBUFS;
+ }
+
+ return (result);
+}
+
+static int
+sbappendcontrol_internal(struct sockbuf *sb, struct mbuf *m0,
+ struct mbuf *control)
+{
+ struct mbuf *m, *mlast, *n;
+ int space = 0;
+
+ if (control == 0)
+ panic("sbappendcontrol");
+
for (m = control; ; m = m->m_next) {
space += m->m_len;
if (m->m_next == 0)
n = m; /* save pointer to last control buffer */
for (m = m0; m; m = m->m_next)
space += m->m_len;
- if (space > sbspace(sb))
+ if (space > sbspace(sb) && !(sb->sb_flags & SB_UNIX))
return (0);
n->m_next = m0; /* concatenate data to control */
- for (m = control; m; m = m->m_next)
+
+ SBLASTRECORDCHK(sb, "sbappendcontrol 1");
+
+ for (m = control; m->m_next != NULL; m = m->m_next)
sballoc(sb, m);
- n = sb->sb_mb;
- if (n) {
- while (n->m_nextpkt)
- n = n->m_nextpkt;
- n->m_nextpkt = control;
- } else
+ sballoc(sb, m);
+ mlast = m;
+
+ if (sb->sb_lastrecord != NULL) {
+ sb->sb_lastrecord->m_nextpkt = control;
+ } else {
sb->sb_mb = control;
- postevent(0,sb,EV_RWBYTES);
+ }
+ sb->sb_lastrecord = control;
+ sb->sb_mbtail = mlast;
+
+ SBLASTMBUFCHK(sb, __func__);
+ SBLASTRECORDCHK(sb, "sbappendcontrol 2");
+
+ postevent(0, sb, EV_RWBYTES);
return (1);
}
+int
+sbappendcontrol(struct sockbuf *sb, struct mbuf *m0, struct mbuf *control,
+ int *error_out)
+{
+ int result = 0;
+ boolean_t sb_unix = (sb->sb_flags & SB_UNIX);
+
+ if (error_out)
+ *error_out = 0;
+
+ if (sb->sb_flags & SB_DROP) {
+ if (m0 != NULL)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out != NULL)
+ *error_out = EINVAL;
+ return (0);
+ }
+
+ if (sb->sb_flags & SB_RECV) {
+ int error;
+
+ error = sflt_data_in(sb->sb_so, NULL, &m0, &control, 0, NULL);
+ SBLASTRECORDCHK(sb, __func__);
+ if (error) {
+ if (error != EJUSTRETURN) {
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = error;
+ }
+ return (0);
+ }
+ }
+
+ result = sbappendcontrol_internal(sb, m0, control);
+ if (result == 0) {
+ if (m0)
+ m_freem(m0);
+ if (control != NULL && !sb_unix)
+ m_freem(control);
+ if (error_out)
+ *error_out = ENOBUFS;
+ }
+
+ return (result);
+}
+
/*
* Compress mbuf chain m into the socket
* buffer sb following mbuf n. If n
* is null, the buffer is presumed empty.
*/
-void
-sbcompress(sb, m, n)
- register struct sockbuf *sb;
- register struct mbuf *m, *n;
+static inline void
+sbcompress(struct sockbuf *sb, struct mbuf *m, struct mbuf *n)
{
- register int eor = 0;
- register struct mbuf *o;
+ int eor = 0;
+ struct mbuf *o;
+
+ if (m == NULL) {
+ /* There is nothing to compress; just update the tail */
+ for (; n->m_next != NULL; n = n->m_next)
+ ;
+ sb->sb_mbtail = n;
+ goto done;
+ }
while (m) {
eor |= m->m_flags & M_EOR;
- if (m->m_len == 0 &&
- (eor == 0 ||
- (((o = m->m_next) || (o = n)) &&
- o->m_type == m->m_type))) {
+ if (m->m_len == 0 && (eor == 0 ||
+ (((o = m->m_next) || (o = n)) && o->m_type == m->m_type))) {
+ if (sb->sb_lastrecord == m)
+ sb->sb_lastrecord = m->m_next;
m = m_free(m);
continue;
}
- if (n && (n->m_flags & (M_EXT | M_EOR)) == 0 &&
- (n->m_data + n->m_len + m->m_len) < &n->m_dat[MLEN] &&
+ if (n && (n->m_flags & M_EOR) == 0 &&
+#ifndef __APPLE__
+ M_WRITABLE(n) &&
+#endif
+ m->m_len <= MCLBYTES / 4 && /* XXX: Don't copy too much */
+ m->m_len <= M_TRAILINGSPACE(n) &&
n->m_type == m->m_type) {
bcopy(mtod(m, caddr_t), mtod(n, caddr_t) + n->m_len,
(unsigned)m->m_len);
n->m_len += m->m_len;
sb->sb_cc += m->m_len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ /* XXX: Probably don't need.*/
+ sb->sb_ctl += m->m_len;
m = m_free(m);
continue;
}
n->m_next = m;
else
sb->sb_mb = m;
+ sb->sb_mbtail = m;
sballoc(sb, m);
n = m;
m->m_flags &= ~M_EOR;
else
printf("semi-panic: sbcompress\n");
}
- postevent(0,sb, EV_RWBYTES);
+done:
+ SBLASTMBUFCHK(sb, __func__);
+ postevent(0, sb, EV_RWBYTES);
+}
+
+void
+sb_empty_assert(struct sockbuf *sb, const char *where)
+{
+ if (!(sb->sb_cc == 0 && sb->sb_mb == NULL && sb->sb_mbcnt == 0 &&
+ sb->sb_mbtail == NULL && sb->sb_lastrecord == NULL)) {
+ panic("%s: sb %p so %p cc %ld mbcnt %ld mb %p mbtail %p "
+ "lastrecord %p\n", where, sb, sb->sb_so, sb->sb_cc,
+ sb->sb_mbcnt, sb->sb_mb, sb->sb_mbtail, sb->sb_lastrecord);
+ /* NOTREACHED */
+ }
}
/*
* Check that all resources are reclaimed.
*/
void
-sbflush(sb)
- register struct sockbuf *sb;
+sbflush(struct sockbuf *sb)
{
- register struct kextcb *kp;
-
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbflush)
- { if ((*kp->e_sout->su_sbflush)(sb, kp))
- return;
- }
- kp = kp->e_next;
- }
-
- if (sb->sb_flags & SB_LOCK)
- panic("sbflush: locked");
- while (sb->sb_mbcnt && sb->sb_cc)
+ if (sb->sb_so == NULL)
+ panic("sbflush sb->sb_so already null sb=%p\n", sb);
+ (void) sblock(sb, M_WAIT);
+ while (sb->sb_mbcnt) {
+ /*
+ * Don't call sbdrop(sb, 0) if the leading mbuf is non-empty:
+ * we would loop forever. Panic instead.
+ */
+ if (!sb->sb_cc && (sb->sb_mb == NULL || sb->sb_mb->m_len))
+ break;
sbdrop(sb, (int)sb->sb_cc);
- if (sb->sb_cc || sb->sb_mb || sb->sb_mbcnt)
- panic("sbflush: cc %ld || mb %p || mbcnt %ld", sb->sb_cc, (void *)sb->sb_mb, sb->sb_mbcnt);
+ }
+ sb_empty_assert(sb, __func__);
postevent(0, sb, EV_RWBYTES);
+ sbunlock(sb, 1); /* keep socket locked */
+
}
/*
* Drop data from (the front of) a sockbuf.
+ * use m_freem_list to free the mbuf structures
+ * under a single lock... this is done by pruning
+ * the top of the tree from the body by keeping track
+ * of where we get to in the tree and then zeroing the
+ * two pertinent pointers m_nextpkt and m_next
+ * the socket buffer is then updated to point at the new
+ * top of the tree and the pruned area is released via
+ * m_freem_list.
*/
void
-sbdrop(sb, len)
- register struct sockbuf *sb;
- register int len;
-{
- register struct mbuf *m, *mn;
- struct mbuf *next;
- register struct kextcb *kp;
-
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbdrop)
- { if ((*kp->e_sout->su_sbdrop)(sb, len, kp))
- return;
- }
- kp = kp->e_next;
- }
+sbdrop(struct sockbuf *sb, int len)
+{
+ struct mbuf *m, *free_list, *ml;
+ struct mbuf *next, *last;
+
+ KERNEL_DEBUG((DBG_FNC_SBDROP | DBG_FUNC_START), sb, len, 0, 0, 0);
next = (m = sb->sb_mb) ? m->m_nextpkt : 0;
+ free_list = last = m;
+ ml = (struct mbuf *)0;
+
while (len > 0) {
if (m == 0) {
- if (next == 0)
- panic("sbdrop");
- m = next;
+ if (next == 0) {
+ /*
+ * temporarily replacing this panic with printf
+ * because it occurs occasionally when closing
+ * a socket when there is no harm in ignoring
+ * it. This problem will be investigated
+ * further.
+ */
+ /* panic("sbdrop"); */
+ printf("sbdrop - count not zero\n");
+ len = 0;
+ /*
+ * zero the counts. if we have no mbufs,
+ * we have no data (PR-2986815)
+ */
+ sb->sb_cc = 0;
+ sb->sb_mbcnt = 0;
+ break;
+ }
+ m = last = next;
next = m->m_nextpkt;
continue;
}
m->m_len -= len;
m->m_data += len;
sb->sb_cc -= len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ sb->sb_ctl -= len;
break;
}
len -= m->m_len;
sbfree(sb, m);
- MFREE(m, mn);
- m = mn;
+
+ ml = m;
+ m = m->m_next;
}
while (m && m->m_len == 0) {
sbfree(sb, m);
- MFREE(m, mn);
- m = mn;
+
+ ml = m;
+ m = m->m_next;
+ }
+ if (ml) {
+ ml->m_next = (struct mbuf *)0;
+ last->m_nextpkt = (struct mbuf *)0;
+ m_freem_list(free_list);
}
if (m) {
sb->sb_mb = m;
m->m_nextpkt = next;
- } else
+ } else {
sb->sb_mb = next;
+ }
+
+ /*
+ * First part is an inline SB_EMPTY_FIXUP(). Second part
+ * makes sure sb_lastrecord is up-to-date if we dropped
+ * part of the last record.
+ */
+ m = sb->sb_mb;
+ if (m == NULL) {
+ sb->sb_mbtail = NULL;
+ sb->sb_lastrecord = NULL;
+ } else if (m->m_nextpkt == NULL) {
+ sb->sb_lastrecord = m;
+ }
+
postevent(0, sb, EV_RWBYTES);
+
+ KERNEL_DEBUG((DBG_FNC_SBDROP | DBG_FUNC_END), sb, 0, 0, 0, 0);
}
/*
* and move the next record to the front.
*/
void
-sbdroprecord(sb)
- register struct sockbuf *sb;
+sbdroprecord(struct sockbuf *sb)
{
- register struct mbuf *m, *mn;
- register struct kextcb *kp;
-
- kp = sotokextcb(sbtoso(sb));
- while (kp)
- { if (kp->e_sout && kp->e_sout->su_sbdroprecord)
- { if ((*kp->e_sout->su_sbdroprecord)(sb, kp))
- return;
- }
- kp = kp->e_next;
- }
+ struct mbuf *m, *mn;
m = sb->sb_mb;
if (m) {
do {
sbfree(sb, m);
MFREE(m, mn);
- } while (m = mn);
+ m = mn;
+ } while (m);
}
+ SB_EMPTY_FIXUP(sb);
postevent(0, sb, EV_RWBYTES);
}
* with the specified type for presentation on a socket buffer.
*/
struct mbuf *
-sbcreatecontrol(p, size, type, level)
- caddr_t p;
- register int size;
- int type, level;
+sbcreatecontrol(caddr_t p, int size, int type, int level)
{
- register struct cmsghdr *cp;
+ struct cmsghdr *cp;
struct mbuf *m;
+ if (CMSG_SPACE((u_int)size) > MLEN)
+ return ((struct mbuf *)NULL);
if ((m = m_get(M_DONTWAIT, MT_CONTROL)) == NULL)
- return ((struct mbuf *) NULL);
+ return ((struct mbuf *)NULL);
cp = mtod(m, struct cmsghdr *);
/* XXX check size? */
- (void)memcpy(CMSG_DATA(cp), p, size);
- size += sizeof(*cp);
- m->m_len = size;
- cp->cmsg_len = size;
+ (void) memcpy(CMSG_DATA(cp), p, size);
+ m->m_len = CMSG_SPACE(size);
+ cp->cmsg_len = CMSG_LEN(size);
cp->cmsg_level = level;
cp->cmsg_type = type;
return (m);
* supported by a protocol. Fill in as needed.
*/
int
-pru_abort_notsupp(struct socket *so)
+pru_abort_notsupp(__unused struct socket *so)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
-
int
-pru_accept_notsupp(struct socket *so, struct sockaddr **nam)
+pru_accept_notsupp(__unused struct socket *so, __unused struct sockaddr **nam)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_attach_notsupp(struct socket *so, int proto, struct proc *p)
+pru_attach_notsupp(__unused struct socket *so, __unused int proto,
+ __unused struct proc *p)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_bind_notsupp(struct socket *so, struct sockaddr *nam, struct proc *p)
+pru_bind_notsupp(__unused struct socket *so, __unused struct sockaddr *nam,
+ __unused struct proc *p)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_connect_notsupp(struct socket *so, struct sockaddr *nam, struct proc *p)
+pru_connect_notsupp(__unused struct socket *so, __unused struct sockaddr *nam,
+ __unused struct proc *p)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_connect2_notsupp(struct socket *so1, struct socket *so2)
+pru_connect2_notsupp(__unused struct socket *so1, __unused struct socket *so2)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_control_notsupp(struct socket *so, u_long cmd, caddr_t data,
- struct ifnet *ifp, struct proc *p)
+pru_control_notsupp(__unused struct socket *so, __unused u_long cmd,
+ __unused caddr_t data, __unused struct ifnet *ifp, __unused struct proc *p)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_detach_notsupp(struct socket *so)
+pru_detach_notsupp(__unused struct socket *so)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_disconnect_notsupp(struct socket *so)
+pru_disconnect_notsupp(__unused struct socket *so)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_listen_notsupp(struct socket *so, struct proc *p)
+pru_listen_notsupp(__unused struct socket *so, __unused struct proc *p)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_peeraddr_notsupp(struct socket *so, struct sockaddr **nam)
+pru_peeraddr_notsupp(__unused struct socket *so, __unused struct sockaddr **nam)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_rcvd_notsupp(struct socket *so, int flags)
+pru_rcvd_notsupp(__unused struct socket *so, __unused int flags)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_rcvoob_notsupp(struct socket *so, struct mbuf *m, int flags)
+pru_rcvoob_notsupp(__unused struct socket *so, __unused struct mbuf *m,
+ __unused int flags)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_send_notsupp(struct socket *so, int flags, struct mbuf *m,
- struct sockaddr *addr, struct mbuf *control,
- struct proc *p)
+pru_send_notsupp(__unused struct socket *so, __unused int flags,
+ __unused struct mbuf *m, __unused struct sockaddr *addr,
+ __unused struct mbuf *control, __unused struct proc *p)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
* and doesn't do anything destructive.
*/
int
-pru_sense_null(struct socket *so, struct stat *sb)
+pru_sense_null(struct socket *so, void *ub, int isstat64)
{
- sb->st_blksize = so->so_snd.sb_hiwat;
- return 0;
+ if (isstat64 != 0) {
+ struct stat64 *sb64;
+
+ sb64 = (struct stat64 *)ub;
+ sb64->st_blksize = so->so_snd.sb_hiwat;
+ } else {
+ struct stat *sb;
+
+ sb = (struct stat *)ub;
+ sb->st_blksize = so->so_snd.sb_hiwat;
+ }
+
+ return (0);
}
-int pru_sosend_notsupp(struct socket *so, struct sockaddr *addr,
- struct uio *uio, struct mbuf *top,
- struct mbuf *control, int flags)
+int
+pru_sosend_notsupp(__unused struct socket *so, __unused struct sockaddr *addr,
+ __unused struct uio *uio, __unused struct mbuf *top,
+ __unused struct mbuf *control, __unused int flags)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
-int pru_soreceive_notsupp(struct socket *so,
- struct sockaddr **paddr,
- struct uio *uio, struct mbuf **mp0,
- struct mbuf **controlp, int *flagsp)
+int
+pru_soreceive_notsupp(__unused struct socket *so,
+ __unused struct sockaddr **paddr,
+ __unused struct uio *uio, __unused struct mbuf **mp0,
+ __unused struct mbuf **controlp, __unused int *flagsp)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
+pru_shutdown_notsupp(__unused struct socket *so)
+{
+ return (EOPNOTSUPP);
+}
-pru_shutdown_notsupp(struct socket *so)
+int
+pru_sockaddr_notsupp(__unused struct socket *so, __unused struct sockaddr **nam)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
int
-pru_sockaddr_notsupp(struct socket *so, struct sockaddr **nam)
+pru_sopoll_notsupp(__unused struct socket *so, __unused int events,
+ __unused kauth_cred_t cred, __unused void *wql)
{
- return EOPNOTSUPP;
+ return (EOPNOTSUPP);
}
-int pru_sosend(struct socket *so, struct sockaddr *addr,
- struct uio *uio, struct mbuf *top,
- struct mbuf *control, int flags)
+
+#ifdef __APPLE__
+/*
+ * The following are macros on BSD and functions on Darwin
+ */
+
+/*
+ * Do we need to notify the other side when I/O is possible?
+ */
+
+int
+sb_notify(struct sockbuf *sb)
{
- return EOPNOTSUPP;
+ return ((sb->sb_flags &
+ (SB_WAIT|SB_SEL|SB_ASYNC|SB_UPCALL|SB_KNOTE)) != 0);
}
-int pru_soreceive(struct socket *so,
- struct sockaddr **paddr,
- struct uio *uio, struct mbuf **mp0,
- struct mbuf **controlp, int *flagsp)
+/*
+ * How much space is there in a socket buffer (so->so_snd or so->so_rcv)?
+ * This is problematical if the fields are unsigned, as the space might
+ * still be negative (cc > hiwat or mbcnt > mbmax). Should detect
+ * overflow and return 0. Should use "lmin" but it doesn't exist now.
+ */
+long
+sbspace(struct sockbuf *sb)
{
- return EOPNOTSUPP;
+ return ((long)imin((int)(sb->sb_hiwat - sb->sb_cc),
+ (int)(sb->sb_mbmax - sb->sb_mbcnt)));
}
+/* do we have to send all at once on a socket? */
+int
+sosendallatonce(struct socket *so)
+{
+ return (so->so_proto->pr_flags & PR_ATOMIC);
+}
-int pru_sopoll_notsupp(struct socket *so, int events,
- struct ucred *cred)
+/* can we read something from so? */
+int
+soreadable(struct socket *so)
{
- return EOPNOTSUPP;
+ return (so->so_rcv.sb_cc >= so->so_rcv.sb_lowat ||
+ (so->so_state & SS_CANTRCVMORE) ||
+ so->so_comp.tqh_first || so->so_error);
}
+/* can we write something to so? */
+int
+sowriteable(struct socket *so)
+{
+ return ((sbspace(&(so)->so_snd) >= (long)(so)->so_snd.sb_lowat &&
+ ((so->so_state&SS_ISCONNECTED) ||
+ (so->so_proto->pr_flags&PR_CONNREQUIRED) == 0)) ||
+ (so->so_state & SS_CANTSENDMORE) ||
+ so->so_error);
+}
+
+/* adjust counters in sb reflecting allocation of m */
+
+void
+sballoc(struct sockbuf *sb, struct mbuf *m)
+{
+ int cnt = 1;
+ sb->sb_cc += m->m_len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ sb->sb_ctl += m->m_len;
+ sb->sb_mbcnt += MSIZE;
+
+ if (m->m_flags & M_EXT) {
+ sb->sb_mbcnt += m->m_ext.ext_size;
+ cnt += m->m_ext.ext_size / MSIZE ;
+ }
+ OSAddAtomic(cnt, (SInt32*)&total_mb_cnt);
+}
+
+/* adjust counters in sb reflecting freeing of m */
+void
+sbfree(struct sockbuf *sb, struct mbuf *m)
+{
+ int cnt = -1;
+ sb->sb_cc -= m->m_len;
+ if (m->m_type != MT_DATA && m->m_type != MT_HEADER &&
+ m->m_type != MT_OOBDATA)
+ sb->sb_ctl -= m->m_len;
+ sb->sb_mbcnt -= MSIZE;
+ if (m->m_flags & M_EXT) {
+ sb->sb_mbcnt -= m->m_ext.ext_size;
+ cnt -= m->m_ext.ext_size / MSIZE ;
+ }
+ OSAddAtomic(cnt, (SInt32*)&total_mb_cnt);
+}
+
+/*
+ * Set lock on sockbuf sb; sleep if lock is already held.
+ * Unless SB_NOINTR is set on sockbuf, sleep is interruptible.
+ * Returns error without lock if sleep is interrupted.
+ *
+ * Returns: 0 Success
+ * EWOULDBLOCK
+ * sb_lock:EINTR
+ */
+int
+sblock(struct sockbuf *sb, int wf)
+{
+ int error = 0;
+
+ if (sb->sb_flags & SB_LOCK)
+ error = (wf == M_WAIT) ? sb_lock(sb) : EWOULDBLOCK;
+ else
+ sb->sb_flags |= SB_LOCK;
+
+ return (error);
+}
+
+/* release lock on sockbuf sb */
+void
+sbunlock(struct sockbuf *sb, int keeplocked)
+{
+ struct socket *so = sb->sb_so;
+ int lr_saved;
+ lck_mtx_t *mutex_held;
+
+ lr_saved = (unsigned int) __builtin_return_address(0);
+
+ sb->sb_flags &= ~SB_LOCK;
+
+ if (sb->sb_flags & SB_WANT) {
+ sb->sb_flags &= ~SB_WANT;
+ if (so->so_usecount < 0)
+ panic("sbunlock: b4 wakeup so=%p ref=%d lr=%x "
+ "sb_flags=%x\n", sb->sb_so, so->so_usecount,
+ lr_saved, sb->sb_flags);
+
+ wakeup((caddr_t)&(sb)->sb_flags);
+ }
+ if (keeplocked == 0) { /* unlock on exit */
+ if (so->so_proto->pr_getlock != NULL)
+ mutex_held = (*so->so_proto->pr_getlock)(so, 0);
+ else
+ mutex_held = so->so_proto->pr_domain->dom_mtx;
+
+ lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
+
+ so->so_usecount--;
+ if (so->so_usecount < 0)
+ panic("sbunlock: unlock on exit so=%p ref=%d lr=%x "
+ "sb_flags=%x\n", so, so->so_usecount, lr_saved,
+ sb->sb_flags);
+ so->unlock_lr[so->next_unlock_lr] = (u_int32_t)lr_saved;
+ so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX;
+ lck_mtx_unlock(mutex_held);
+ }
+}
+
+void
+sorwakeup(struct socket *so)
+{
+ if (sb_notify(&so->so_rcv))
+ sowakeup(so, &so->so_rcv);
+}
+
+void
+sowwakeup(struct socket *so)
+{
+ if (sb_notify(&so->so_snd))
+ sowakeup(so, &so->so_snd);
+}
+#endif /* __APPLE__ */
/*
* Make a copy of a sockaddr in a malloced buffer of type M_SONAME.
*/
struct sockaddr *
-dup_sockaddr(sa, canwait)
- struct sockaddr *sa;
- int canwait;
+dup_sockaddr(struct sockaddr *sa, int canwait)
{
struct sockaddr *sa2;
- MALLOC(sa2, struct sockaddr *, sa->sa_len, M_SONAME,
- canwait ? M_WAITOK : M_NOWAIT);
+ MALLOC(sa2, struct sockaddr *, sa->sa_len, M_SONAME,
+ canwait ? M_WAITOK : M_NOWAIT);
if (sa2)
bcopy(sa, sa2, sa->sa_len);
- return sa2;
+ return (sa2);
}
/*
void
sotoxsocket(struct socket *so, struct xsocket *xso)
{
- xso->xso_len = sizeof *xso;
+ xso->xso_len = sizeof (*xso);
xso->xso_so = so;
xso->so_type = so->so_type;
xso->so_options = so->so_options;
xso->so_linger = so->so_linger;
xso->so_state = so->so_state;
xso->so_pcb = so->so_pcb;
- xso->xso_protocol = so->so_proto->pr_protocol;
- xso->xso_family = so->so_proto->pr_domain->dom_family;
+ if (so->so_proto) {
+ xso->xso_protocol = so->so_proto->pr_protocol;
+ xso->xso_family = so->so_proto->pr_domain->dom_family;
+ } else {
+ xso->xso_protocol = xso->xso_family = 0;
+ }
xso->so_qlen = so->so_qlen;
xso->so_incqlen = so->so_incqlen;
xso->so_qlimit = so->so_qlimit;
xsb->sb_mbmax = sb->sb_mbmax;
xsb->sb_lowat = sb->sb_lowat;
xsb->sb_flags = sb->sb_flags;
- xsb->sb_timeo = sb->sb_timeo;
+ xsb->sb_timeo = (u_long)
+ (sb->sb_timeo.tv_sec * hz) + sb->sb_timeo.tv_usec / tick;
+ if (xsb->sb_timeo == 0 && sb->sb_timeo.tv_usec != 0)
+ xsb->sb_timeo = 1;
}
/*
* Here is the definition of some of the basic objects in the kern.ipc
* branch of the MIB.
*/
-
-
-SYSCTL_NODE(_kern, KERN_IPC, ipc, CTLFLAG_RW, 0, "IPC");
+SYSCTL_NODE(_kern, KERN_IPC, ipc, CTLFLAG_RW|CTLFLAG_LOCKED, 0, "IPC");
/* This takes the place of kern.maxsockbuf, which moved to kern.ipc. */
static int dummy;
SYSCTL_INT(_kern, KERN_DUMMY, dummy, CTLFLAG_RW, &dummy, 0, "");
-SYSCTL_INT(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLFLAG_RW, &sb_max, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, maxsockets, CTLFLAG_RD, &maxsockets, 0, "");
+SYSCTL_INT(_kern_ipc, KIPC_MAXSOCKBUF, maxsockbuf, CTLFLAG_RW,
+ &sb_max, 0, "Maximum socket buffer size");
+SYSCTL_INT(_kern_ipc, OID_AUTO, maxsockets, CTLFLAG_RD,
+ &maxsockets, 0, "Maximum number of sockets avaliable");
SYSCTL_INT(_kern_ipc, KIPC_SOCKBUF_WASTE, sockbuf_waste_factor, CTLFLAG_RW,
- &sb_efficiency, 0, "");
-SYSCTL_INT(_kern_ipc, KIPC_NMBCLUSTERS, nmbclusters, CTLFLAG_RD, &nmbclusters, 0, "");
-
+ &sb_efficiency, 0, "");
+SYSCTL_INT(_kern_ipc, OID_AUTO, sbspace_factor, CTLFLAG_RW,
+ &sbspace_factor, 0, "Ratio of mbuf/cluster use for socket layers");
+SYSCTL_INT(_kern_ipc, KIPC_NMBCLUSTERS, nmbclusters, CTLFLAG_RD,
+ &nmbclusters, 0, "");
+SYSCTL_INT(_kern_ipc, OID_AUTO, njcl, CTLFLAG_RD, &njcl, 0, "");
+SYSCTL_INT(_kern_ipc, OID_AUTO, njclbytes, CTLFLAG_RD, &njclbytes, 0, "");
+SYSCTL_INT(_kern_ipc, KIPC_SOQLIMITCOMPAT, soqlimitcompat, CTLFLAG_RW,
+ &soqlimitcompat, 1, "Enable socket queue limit compatibility");
+SYSCTL_INT(_kern_ipc, OID_AUTO, soqlencomp, CTLFLAG_RW,
+ &soqlencomp, 0, "Listen backlog represents only complete queue");
projects / apple / xnu.git / blobdiff