Import socket() implementation from FreeBSD

Add new test syscalls01.

1 files changed, 2784 insertions, 0 deletions

diff --git a/freebsd/sys/kern/uipc_syscalls.c b/freebsd/sys/kern/uipc_syscalls.c
new file mode 100644
index 00000000..28f6c10c
--- /dev/null
+++ b/freebsd/sys/kern/uipc_syscalls.c
@@ -0,0 +1,2784 @@
+#include <machine/rtems-bsd-config.h>
+
+/*-
+ * Copyright (c) 1982, 1986, 1989, 1990, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * sendfile(2) and related extensions:
+ * Copyright (c) 1998, David Greenman. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)uipc_syscalls.c	8.4 (Berkeley) 2/21/94
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <rtems/bsd/local/opt_inet.h>
+#include <rtems/bsd/local/opt_inet6.h>
+#include <rtems/bsd/local/opt_sctp.h>
+#include <rtems/bsd/local/opt_compat.h>
+#include <rtems/bsd/local/opt_ktrace.h>
+
+#include <rtems/bsd/sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <rtems/bsd/sys/lock.h>
+#include <sys/mutex.h>
+#include <sys/sysproto.h>
+#include <sys/malloc.h>
+#include <sys/filedesc.h>
+#include <sys/event.h>
+#include <sys/proc.h>
+#include <sys/fcntl.h>
+#include <sys/file.h>
+#include <sys/filio.h>
+#include <sys/jail.h>
+#include <sys/mount.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/sf_buf.h>
+#include <sys/sysent.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#include <sys/signalvar.h>
+#include <sys/syscallsubr.h>
+#include <sys/sysctl.h>
+#include <sys/uio.h>
+#include <sys/vnode.h>
+#ifdef KTRACE
+#include <sys/ktrace.h>
+#endif
+#ifdef COMPAT_FREEBSD32
+#include <compat/freebsd32/freebsd32_util.h>
+#endif
+
+#include <net/vnet.h>
+
+#include <security/audit/audit.h>
+#include <security/mac/mac_framework.h>
+
+#include <vm/vm.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pageout.h>
+#include <vm/vm_kern.h>
+#include <vm/vm_extern.h>
+
+#if defined(INET) || defined(INET6)
+#ifdef SCTP
+#include <netinet/sctp.h>
+#include <netinet/sctp_peeloff.h>
+#endif /* SCTP */
+#endif /* INET || INET6 */
+#ifdef __rtems__
+#include <machine/rtems-bsd-syscall-api.h>
+#endif /* __rtems__ */
+
+#ifndef __rtems__
+static int sendit(struct thread *td, int s, struct msghdr *mp, int flags);
+static int recvit(struct thread *td, int s, struct msghdr *mp, void *namelenp);
+
+static int accept1(struct thread *td, struct accept_args *uap, int compat);
+static int do_sendfile(struct thread *td, struct sendfile_args *uap, int compat);
+static int getsockname1(struct thread *td, struct getsockname_args *uap,
+			int compat);
+static int getpeername1(struct thread *td, struct getpeername_args *uap,
+			int compat);
+
+/*
+ * NSFBUFS-related variables and associated sysctls
+ */
+int nsfbufs;
+int nsfbufspeak;
+int nsfbufsused;
+
+SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufs, CTLFLAG_RDTUN, &nsfbufs, 0,
+    "Maximum number of sendfile(2) sf_bufs available");
+SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufspeak, CTLFLAG_RD, &nsfbufspeak, 0,
+    "Number of sendfile(2) sf_bufs at peak usage");
+SYSCTL_INT(_kern_ipc, OID_AUTO, nsfbufsused, CTLFLAG_RD, &nsfbufsused, 0,
+    "Number of sendfile(2) sf_bufs in use");
+
+/*
+ * Convert a user file descriptor to a kernel file entry.  A reference on the
+ * file entry is held upon returning.  This is lighter weight than
+ * fgetsock(), which bumps the socket reference drops the file reference
+ * count instead, as this approach avoids several additional mutex operations
+ * associated with the additional reference count.  If requested, return the
+ * open file flags.
+ */
+static int
+getsock(struct filedesc *fdp, int fd, struct file **fpp, u_int *fflagp)
+{
+	struct file *fp;
+	int error;
+
+	fp = NULL;
+	if (fdp == NULL || (fp = fget_unlocked(fdp, fd)) == NULL) {
+		error = EBADF;
+	} else if (fp->f_type != DTYPE_SOCKET) {
+		fdrop(fp, curthread);
+		fp = NULL;
+		error = ENOTSOCK;
+	} else {
+		if (fflagp != NULL)
+			*fflagp = fp->f_flag;
+		error = 0;
+	}
+	*fpp = fp;
+	return (error);
+}
+
+/*
+ * System call interface to the socket abstraction.
+ */
+#if defined(COMPAT_43)
+#define COMPAT_OLDSOCK
+#endif
+#endif /* __rtems__ */
+
+#ifndef __rtems__
+int
+socket(td, uap)
+#else /* __rtems__ */
+static int
+rtems_bsd_socket(td, uap)
+#endif /* __rtems__ */
+	struct thread *td;
+	struct socket_args /* {
+		int	domain;
+		int	type;
+		int	protocol;
+	} */ *uap;
+{
+#ifndef __rtems__
+	struct filedesc *fdp;
+#endif /* __rtems__ */
+	struct socket *so;
+	struct file *fp;
+	int fd, error;
+
+	AUDIT_ARG_SOCKET(uap->domain, uap->type, uap->protocol);
+#ifdef MAC
+	error = mac_socket_check_create(td->td_ucred, uap->domain, uap->type,
+	    uap->protocol);
+	if (error)
+		return (error);
+#endif
+#ifndef __rtems__
+	fdp = td->td_proc->p_fd;
+#endif /* __rtems__ */
+	error = falloc(td, &fp, &fd);
+	if (error)
+		return (error);
+	/* An extra reference on `fp' has been held for us by falloc(). */
+	error = socreate(uap->domain, &so, uap->type, uap->protocol,
+	    td->td_ucred, td);
+	if (error) {
+		fdclose(fdp, fp, fd, td);
+	} else {
+		finit(fp, FREAD | FWRITE, DTYPE_SOCKET, so, &socketops);
+		td->td_retval[0] = fd;
+	}
+	fdrop(fp, td);
+	return (error);
+}
+#ifdef __rtems__
+int
+socket(int domain, int type, int protocol)
+{
+	struct thread *td = rtems_bsd_get_curthread_or_null();
+	struct socket_args ua = {
+		.domain = domain,
+		.type = type,
+		.protocol = protocol
+	};
+	int error;
+
+	if (td != NULL) {
+		error = rtems_bsd_socket(td, &ua);
+	} else {
+		error = ENOMEM;
+	}
+
+	if (error == 0) {
+		return td->td_retval[0];
+	} else {
+		rtems_set_errno_and_return_minus_one(error);
+	}
+}
+#endif /* __rtems__ */
+
+#ifndef __rtems__
+/* ARGSUSED */
+int
+bind(td, uap)
+	struct thread *td;
+	struct bind_args /* {
+		int	s;
+		caddr_t	name;
+		int	namelen;
+	} */ *uap;
+{
+	struct sockaddr *sa;
+	int error;
+
+	if ((error = getsockaddr(&sa, uap->name, uap->namelen)) != 0)
+		return (error);
+
+	error = kern_bind(td, uap->s, sa);
+	free(sa, M_SONAME);
+	return (error);
+}
+
+int
+kern_bind(td, fd, sa)
+	struct thread *td;
+	int fd;
+	struct sockaddr *sa;
+{
+	struct socket *so;
+	struct file *fp;
+	int error;
+
+	AUDIT_ARG_FD(fd);
+	error = getsock(td->td_proc->p_fd, fd, &fp, NULL);
+	if (error)
+		return (error);
+	so = fp->f_data;
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_STRUCT))
+		ktrsockaddr(sa);
+#endif
+#ifdef MAC
+	error = mac_socket_check_bind(td->td_ucred, so, sa);
+	if (error == 0)
+#endif
+		error = sobind(so, sa, td);
+	fdrop(fp, td);
+	return (error);
+}
+
+/* ARGSUSED */
+int
+listen(td, uap)
+	struct thread *td;
+	struct listen_args /* {
+		int	s;
+		int	backlog;
+	} */ *uap;
+{
+	struct socket *so;
+	struct file *fp;
+	int error;
+
+	AUDIT_ARG_FD(uap->s);
+	error = getsock(td->td_proc->p_fd, uap->s, &fp, NULL);
+	if (error == 0) {
+		so = fp->f_data;
+#ifdef MAC
+		error = mac_socket_check_listen(td->td_ucred, so);
+		if (error == 0) {
+#endif
+			CURVNET_SET(so->so_vnet);
+			error = solisten(so, uap->backlog, td);
+			CURVNET_RESTORE();
+#ifdef MAC
+		}
+#endif
+		fdrop(fp, td);
+	}
+	return(error);
+}
+
+/*
+ * accept1()
+ */
+static int
+accept1(td, uap, compat)
+	struct thread *td;
+	struct accept_args /* {
+		int	s;
+		struct sockaddr	* __restrict name;
+		socklen_t	* __restrict anamelen;
+	} */ *uap;
+	int compat;
+{
+	struct sockaddr *name;
+	socklen_t namelen;
+	struct file *fp;
+	int error;
+
+	if (uap->name == NULL)
+		return (kern_accept(td, uap->s, NULL, NULL, NULL));
+
+	error = copyin(uap->anamelen, &namelen, sizeof (namelen));
+	if (error)
+		return (error);
+
+	error = kern_accept(td, uap->s, &name, &namelen, &fp);
+
+	/*
+	 * return a namelen of zero for older code which might
+	 * ignore the return value from accept.
+	 */
+	if (error) {
+		(void) copyout(&namelen,
+		    uap->anamelen, sizeof(*uap->anamelen));
+		return (error);
+	}
+
+	if (error == 0 && name != NULL) {
+#ifdef COMPAT_OLDSOCK
+		if (compat)
+			((struct osockaddr *)name)->sa_family =
+			    name->sa_family;
+#endif
+		error = copyout(name, uap->name, namelen);
+	}
+	if (error == 0)
+		error = copyout(&namelen, uap->anamelen,
+		    sizeof(namelen));
+	if (error)
+		fdclose(td->td_proc->p_fd, fp, td->td_retval[0], td);
+	fdrop(fp, td);
+	free(name, M_SONAME);
+	return (error);
+}
+
+int
+kern_accept(struct thread *td, int s, struct sockaddr **name,
+    socklen_t *namelen, struct file **fp)
+{
+	struct filedesc *fdp;
+	struct file *headfp, *nfp = NULL;
+	struct sockaddr *sa = NULL;
+	int error;
+	struct socket *head, *so;
+	int fd;
+	u_int fflag;
+	pid_t pgid;
+	int tmp;
+
+	if (name) {
+		*name = NULL;
+		if (*namelen < 0)
+			return (EINVAL);
+	}
+
+	AUDIT_ARG_FD(s);
+	fdp = td->td_proc->p_fd;
+	error = getsock(fdp, s, &headfp, &fflag);
+	if (error)
+		return (error);
+	head = headfp->f_data;
+	if ((head->so_options & SO_ACCEPTCONN) == 0) {
+		error = EINVAL;
+		goto done;
+	}
+#ifdef MAC
+	error = mac_socket_check_accept(td->td_ucred, head);
+	if (error != 0)
+		goto done;
+#endif
+	error = falloc(td, &nfp, &fd);
+	if (error)
+		goto done;
+	ACCEPT_LOCK();
+	if ((head->so_state & SS_NBIO) && TAILQ_EMPTY(&head->so_comp)) {
+		ACCEPT_UNLOCK();
+		error = EWOULDBLOCK;
+		goto noconnection;
+	}
+	while (TAILQ_EMPTY(&head->so_comp) && head->so_error == 0) {
+		if (head->so_rcv.sb_state & SBS_CANTRCVMORE) {
+			head->so_error = ECONNABORTED;
+			break;
+		}
+		error = msleep(&head->so_timeo, &accept_mtx, PSOCK | PCATCH,
+		    "accept", 0);
+		if (error) {
+			ACCEPT_UNLOCK();
+			goto noconnection;
+		}
+	}
+	if (head->so_error) {
+		error = head->so_error;
+		head->so_error = 0;
+		ACCEPT_UNLOCK();
+		goto noconnection;
+	}
+	so = TAILQ_FIRST(&head->so_comp);
+	KASSERT(!(so->so_qstate & SQ_INCOMP), ("accept1: so SQ_INCOMP"));
+	KASSERT(so->so_qstate & SQ_COMP, ("accept1: so not SQ_COMP"));
+
+	/*
+	 * Before changing the flags on the socket, we have to bump the
+	 * reference count.  Otherwise, if the protocol calls sofree(),
+	 * the socket will be released due to a zero refcount.
+	 */
+	SOCK_LOCK(so);			/* soref() and so_state update */
+	soref(so);			/* file descriptor reference */
+
+	TAILQ_REMOVE(&head->so_comp, so, so_list);
+	head->so_qlen--;
+	so->so_state |= (head->so_state & SS_NBIO);
+	so->so_qstate &= ~SQ_COMP;
+	so->so_head = NULL;
+
+	SOCK_UNLOCK(so);
+	ACCEPT_UNLOCK();
+
+	/* An extra reference on `nfp' has been held for us by falloc(). */
+	td->td_retval[0] = fd;
+
+	/* connection has been removed from the listen queue */
+	KNOTE_UNLOCKED(&head->so_rcv.sb_sel.si_note, 0);
+
+	pgid = fgetown(&head->so_sigio);
+	if (pgid != 0)
+		fsetown(pgid, &so->so_sigio);
+
+	finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
+	/* Sync socket nonblocking/async state with file flags */
+	tmp = fflag & FNONBLOCK;
+	(void) fo_ioctl(nfp, FIONBIO, &tmp, td->td_ucred, td);
+	tmp = fflag & FASYNC;
+	(void) fo_ioctl(nfp, FIOASYNC, &tmp, td->td_ucred, td);
+	sa = 0;
+	CURVNET_SET(so->so_vnet);
+	error = soaccept(so, &sa);
+	CURVNET_RESTORE();
+	if (error) {
+		/*
+		 * return a namelen of zero for older code which might
+		 * ignore the return value from accept.
+		 */
+		if (name)
+			*namelen = 0;
+		goto noconnection;
+	}
+	if (sa == NULL) {
+		if (name)
+			*namelen = 0;
+		goto done;
+	}
+	if (name) {
+		/* check sa_len before it is destroyed */
+		if (*namelen > sa->sa_len)
+			*namelen = sa->sa_len;
+#ifdef KTRACE
+		if (KTRPOINT(td, KTR_STRUCT))
+			ktrsockaddr(sa);
+#endif
+		*name = sa;
+		sa = NULL;
+	}
+noconnection:
+	if (sa)
+		free(sa, M_SONAME);
+
+	/*
+	 * close the new descriptor, assuming someone hasn't ripped it
+	 * out from under us.
+	 */
+	if (error)
+		fdclose(fdp, nfp, fd, td);
+
+	/*
+	 * Release explicitly held references before returning.  We return
+	 * a reference on nfp to the caller on success if they request it.
+	 */
+done:
+	if (fp != NULL) {
+		if (error == 0) {
+			*fp = nfp;
+			nfp = NULL;
+		} else
+			*fp = NULL;
+	}
+	if (nfp != NULL)
+		fdrop(nfp, td);
+	fdrop(headfp, td);
+	return (error);
+}
+
+int
+accept(td, uap)
+	struct thread *td;
+	struct accept_args *uap;
+{
+
+	return (accept1(td, uap, 0));
+}
+
+#ifdef COMPAT_OLDSOCK
+int
+oaccept(td, uap)
+	struct thread *td;
+	struct accept_args *uap;
+{
+
+	return (accept1(td, uap, 1));
+}
+#endif /* COMPAT_OLDSOCK */
+
+/* ARGSUSED */
+int
+connect(td, uap)
+	struct thread *td;
+	struct connect_args /* {
+		int	s;
+		caddr_t	name;
+		int	namelen;
+	} */ *uap;
+{
+	struct sockaddr *sa;
+	int error;
+
+	error = getsockaddr(&sa, uap->name, uap->namelen);
+	if (error)
+		return (error);
+
+	error = kern_connect(td, uap->s, sa);
+	free(sa, M_SONAME);
+	return (error);
+}
+
+
+int
+kern_connect(td, fd, sa)
+	struct thread *td;
+	int fd;
+	struct sockaddr *sa;
+{
+	struct socket *so;
+	struct file *fp;
+	int error;
+	int interrupted = 0;
+
+	AUDIT_ARG_FD(fd);
+	error = getsock(td->td_proc->p_fd, fd, &fp, NULL);
+	if (error)
+		return (error);
+	so = fp->f_data;
+	if (so->so_state & SS_ISCONNECTING) {
+		error = EALREADY;
+		goto done1;
+	}
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_STRUCT))
+		ktrsockaddr(sa);
+#endif
+#ifdef MAC
+	error = mac_socket_check_connect(td->td_ucred, so, sa);
+	if (error)
+		goto bad;
+#endif
+	error = soconnect(so, sa, td);
+	if (error)
+		goto bad;
+	if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
+		error = EINPROGRESS;
+		goto done1;
+	}
+	SOCK_LOCK(so);
+	while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
+		error = msleep(&so->so_timeo, SOCK_MTX(so), PSOCK | PCATCH,
+		    "connec", 0);
+		if (error) {
+			if (error == EINTR || error == ERESTART)
+				interrupted = 1;
+			break;
+		}
+	}
+	if (error == 0) {
+		error = so->so_error;
+		so->so_error = 0;
+	}
+	SOCK_UNLOCK(so);
+bad:
+	if (!interrupted)
+		so->so_state &= ~SS_ISCONNECTING;
+	if (error == ERESTART)
+		error = EINTR;
+done1:
+	fdrop(fp, td);
+	return (error);
+}
+
+int
+kern_socketpair(struct thread *td, int domain, int type, int protocol,
+    int *rsv)
+{
+	struct filedesc *fdp = td->td_proc->p_fd;
+	struct file *fp1, *fp2;
+	struct socket *so1, *so2;
+	int fd, error;
+
+	AUDIT_ARG_SOCKET(domain, type, protocol);
+#ifdef MAC
+	/* We might want to have a separate check for socket pairs. */
+	error = mac_socket_check_create(td->td_ucred, domain, type,
+	    protocol);
+	if (error)
+		return (error);
+#endif
+	error = socreate(domain, &so1, type, protocol, td->td_ucred, td);
+	if (error)
+		return (error);
+	error = socreate(domain, &so2, type, protocol, td->td_ucred, td);
+	if (error)
+		goto free1;
+	/* On success extra reference to `fp1' and 'fp2' is set by falloc. */
+	error = falloc(td, &fp1, &fd);
+	if (error)
+		goto free2;
+	rsv[0] = fd;
+	fp1->f_data = so1;	/* so1 already has ref count */
+	error = falloc(td, &fp2, &fd);
+	if (error)
+		goto free3;
+	fp2->f_data = so2;	/* so2 already has ref count */
+	rsv[1] = fd;
+	error = soconnect2(so1, so2);
+	if (error)
+		goto free4;
+	if (type == SOCK_DGRAM) {
+		/*
+		 * Datagram socket connection is asymmetric.
+		 */
+		 error = soconnect2(so2, so1);
+		 if (error)
+			goto free4;
+	}
+	finit(fp1, FREAD | FWRITE, DTYPE_SOCKET, fp1->f_data, &socketops);
+	finit(fp2, FREAD | FWRITE, DTYPE_SOCKET, fp2->f_data, &socketops);
+	fdrop(fp1, td);
+	fdrop(fp2, td);
+	return (0);
+free4:
+	fdclose(fdp, fp2, rsv[1], td);
+	fdrop(fp2, td);
+free3:
+	fdclose(fdp, fp1, rsv[0], td);
+	fdrop(fp1, td);
+free2:
+	if (so2 != NULL)
+		(void)soclose(so2);
+free1:
+	if (so1 != NULL)
+		(void)soclose(so1);
+	return (error);
+}
+
+int
+socketpair(struct thread *td, struct socketpair_args *uap)
+{
+	int error, sv[2];
+
+	error = kern_socketpair(td, uap->domain, uap->type,
+	    uap->protocol, sv);
+	if (error)
+		return (error);
+	error = copyout(sv, uap->rsv, 2 * sizeof(int));
+	if (error) {
+		(void)kern_close(td, sv[0]);
+		(void)kern_close(td, sv[1]);
+	}
+	return (error);
+}
+
+static int
+sendit(td, s, mp, flags)
+	struct thread *td;
+	int s;
+	struct msghdr *mp;
+	int flags;
+{
+	struct mbuf *control;
+	struct sockaddr *to;
+	int error;
+
+	if (mp->msg_name != NULL) {
+		error = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
+		if (error) {
+			to = NULL;
+			goto bad;
+		}
+		mp->msg_name = to;
+	} else {
+		to = NULL;
+	}
+
+	if (mp->msg_control) {
+		if (mp->msg_controllen < sizeof(struct cmsghdr)
+#ifdef COMPAT_OLDSOCK
+		    && mp->msg_flags != MSG_COMPAT
+#endif
+		) {
+			error = EINVAL;
+			goto bad;
+		}
+		error = sockargs(&control, mp->msg_control,
+		    mp->msg_controllen, MT_CONTROL);
+		if (error)
+			goto bad;
+#ifdef COMPAT_OLDSOCK
+		if (mp->msg_flags == MSG_COMPAT) {
+			struct cmsghdr *cm;
+
+			M_PREPEND(control, sizeof(*cm), M_WAIT);
+			cm = mtod(control, struct cmsghdr *);
+			cm->cmsg_len = control->m_len;
+			cm->cmsg_level = SOL_SOCKET;
+			cm->cmsg_type = SCM_RIGHTS;
+		}
+#endif
+	} else {
+		control = NULL;
+	}
+
+	error = kern_sendit(td, s, mp, flags, control, UIO_USERSPACE);
+
+bad:
+	if (to)
+		free(to, M_SONAME);
+	return (error);
+}
+
+int
+kern_sendit(td, s, mp, flags, control, segflg)
+	struct thread *td;
+	int s;
+	struct msghdr *mp;
+	int flags;
+	struct mbuf *control;
+	enum uio_seg segflg;
+{
+	struct file *fp;
+	struct uio auio;
+	struct iovec *iov;
+	struct socket *so;
+	int i;
+	int len, error;
+#ifdef KTRACE
+	struct uio *ktruio = NULL;
+#endif
+
+	AUDIT_ARG_FD(s);
+	error = getsock(td->td_proc->p_fd, s, &fp, NULL);
+	if (error)
+		return (error);
+	so = (struct socket *)fp->f_data;
+
+#ifdef MAC
+	if (mp->msg_name != NULL) {
+		error = mac_socket_check_connect(td->td_ucred, so,
+		    mp->msg_name);
+		if (error)
+			goto bad;
+	}
+	error = mac_socket_check_send(td->td_ucred, so);
+	if (error)
+		goto bad;
+#endif
+
+	auio.uio_iov = mp->msg_iov;
+	auio.uio_iovcnt = mp->msg_iovlen;
+	auio.uio_segflg = segflg;
+	auio.uio_rw = UIO_WRITE;
+	auio.uio_td = td;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	iov = mp->msg_iov;
+	for (i = 0; i < mp->msg_iovlen; i++, iov++) {
+		if ((auio.uio_resid += iov->iov_len) < 0) {
+			error = EINVAL;
+			goto bad;
+		}
+	}
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_GENIO))
+		ktruio = cloneuio(&auio);
+#endif
+	len = auio.uio_resid;
+	error = sosend(so, mp->msg_name, &auio, 0, control, flags, td);
+	if (error) {
+		if (auio.uio_resid != len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+		/* Generation of SIGPIPE can be controlled per socket */
+		if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
+		    !(flags & MSG_NOSIGNAL)) {
+			PROC_LOCK(td->td_proc);
+			tdksignal(td, SIGPIPE, NULL);
+			PROC_UNLOCK(td->td_proc);
+		}
+	}
+	if (error == 0)
+		td->td_retval[0] = len - auio.uio_resid;
+#ifdef KTRACE
+	if (ktruio != NULL) {
+		ktruio->uio_resid = td->td_retval[0];
+		ktrgenio(s, UIO_WRITE, ktruio, error);
+	}
+#endif
+bad:
+	fdrop(fp, td);
+	return (error);
+}
+
+int
+sendto(td, uap)
+	struct thread *td;
+	struct sendto_args /* {
+		int	s;
+		caddr_t	buf;
+		size_t	len;
+		int	flags;
+		caddr_t	to;
+		int	tolen;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+	int error;
+
+	msg.msg_name = uap->to;
+	msg.msg_namelen = uap->tolen;
+	msg.msg_iov = &aiov;
+	msg.msg_iovlen = 1;
+	msg.msg_control = 0;
+#ifdef COMPAT_OLDSOCK
+	msg.msg_flags = 0;
+#endif
+	aiov.iov_base = uap->buf;
+	aiov.iov_len = uap->len;
+	error = sendit(td, uap->s, &msg, uap->flags);
+	return (error);
+}
+
+#ifdef COMPAT_OLDSOCK
+int
+osend(td, uap)
+	struct thread *td;
+	struct osend_args /* {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+	int error;
+
+	msg.msg_name = 0;
+	msg.msg_namelen = 0;
+	msg.msg_iov = &aiov;
+	msg.msg_iovlen = 1;
+	aiov.iov_base = uap->buf;
+	aiov.iov_len = uap->len;
+	msg.msg_control = 0;
+	msg.msg_flags = 0;
+	error = sendit(td, uap->s, &msg, uap->flags);
+	return (error);
+}
+
+int
+osendmsg(td, uap)
+	struct thread *td;
+	struct osendmsg_args /* {
+		int	s;
+		caddr_t	msg;
+		int	flags;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec *iov;
+	int error;
+
+	error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
+	if (error)
+		return (error);
+	error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
+	if (error)
+		return (error);
+	msg.msg_iov = iov;
+	msg.msg_flags = MSG_COMPAT;
+	error = sendit(td, uap->s, &msg, uap->flags);
+	free(iov, M_IOV);
+	return (error);
+}
+#endif
+
+int
+sendmsg(td, uap)
+	struct thread *td;
+	struct sendmsg_args /* {
+		int	s;
+		caddr_t	msg;
+		int	flags;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec *iov;
+	int error;
+
+	error = copyin(uap->msg, &msg, sizeof (msg));
+	if (error)
+		return (error);
+	error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
+	if (error)
+		return (error);
+	msg.msg_iov = iov;
+#ifdef COMPAT_OLDSOCK
+	msg.msg_flags = 0;
+#endif
+	error = sendit(td, uap->s, &msg, uap->flags);
+	free(iov, M_IOV);
+	return (error);
+}
+
+int
+kern_recvit(td, s, mp, fromseg, controlp)
+	struct thread *td;
+	int s;
+	struct msghdr *mp;
+	enum uio_seg fromseg;
+	struct mbuf **controlp;
+{
+	struct uio auio;
+	struct iovec *iov;
+	int i;
+	socklen_t len;
+	int error;
+	struct mbuf *m, *control = 0;
+	caddr_t ctlbuf;
+	struct file *fp;
+	struct socket *so;
+	struct sockaddr *fromsa = 0;
+#ifdef KTRACE
+	struct uio *ktruio = NULL;
+#endif
+
+	if(controlp != NULL)
+		*controlp = 0;
+
+	AUDIT_ARG_FD(s);
+	error = getsock(td->td_proc->p_fd, s, &fp, NULL);
+	if (error)
+		return (error);
+	so = fp->f_data;
+
+#ifdef MAC
+	error = mac_socket_check_receive(td->td_ucred, so);
+	if (error) {
+		fdrop(fp, td);
+		return (error);
+	}
+#endif
+
+	auio.uio_iov = mp->msg_iov;
+	auio.uio_iovcnt = mp->msg_iovlen;
+	auio.uio_segflg = UIO_USERSPACE;
+	auio.uio_rw = UIO_READ;
+	auio.uio_td = td;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	iov = mp->msg_iov;
+	for (i = 0; i < mp->msg_iovlen; i++, iov++) {
+		if ((auio.uio_resid += iov->iov_len) < 0) {
+			fdrop(fp, td);
+			return (EINVAL);
+		}
+	}
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_GENIO))
+		ktruio = cloneuio(&auio);
+#endif
+	len = auio.uio_resid;
+	CURVNET_SET(so->so_vnet);
+	error = soreceive(so, &fromsa, &auio, (struct mbuf **)0,
+	    (mp->msg_control || controlp) ? &control : (struct mbuf **)0,
+	    &mp->msg_flags);
+	CURVNET_RESTORE();
+	if (error) {
+		if (auio.uio_resid != (int)len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+	}
+#ifdef KTRACE
+	if (ktruio != NULL) {
+		ktruio->uio_resid = (int)len - auio.uio_resid;
+		ktrgenio(s, UIO_READ, ktruio, error);
+	}
+#endif
+	if (error)
+		goto out;
+	td->td_retval[0] = (int)len - auio.uio_resid;
+	if (mp->msg_name) {
+		len = mp->msg_namelen;
+		if (len <= 0 || fromsa == 0)
+			len = 0;
+		else {
+			/* save sa_len before it is destroyed by MSG_COMPAT */
+			len = MIN(len, fromsa->sa_len);
+#ifdef COMPAT_OLDSOCK
+			if (mp->msg_flags & MSG_COMPAT)
+				((struct osockaddr *)fromsa)->sa_family =
+				    fromsa->sa_family;
+#endif
+			if (fromseg == UIO_USERSPACE) {
+				error = copyout(fromsa, mp->msg_name,
+				    (unsigned)len);
+				if (error)
+					goto out;
+			} else
+				bcopy(fromsa, mp->msg_name, len);
+		}
+		mp->msg_namelen = len;
+	}
+	if (mp->msg_control && controlp == NULL) {
+#ifdef COMPAT_OLDSOCK
+		/*
+		 * We assume that old recvmsg calls won't receive access
+		 * rights and other control info, esp. as control info
+		 * is always optional and those options didn't exist in 4.3.
+		 * If we receive rights, trim the cmsghdr; anything else
+		 * is tossed.
+		 */
+		if (control && mp->msg_flags & MSG_COMPAT) {
+			if (mtod(control, struct cmsghdr *)->cmsg_level !=
+			    SOL_SOCKET ||
+			    mtod(control, struct cmsghdr *)->cmsg_type !=
+			    SCM_RIGHTS) {
+				mp->msg_controllen = 0;
+				goto out;
+			}
+			control->m_len -= sizeof (struct cmsghdr);
+			control->m_data += sizeof (struct cmsghdr);
+		}
+#endif
+		len = mp->msg_controllen;
+		m = control;
+		mp->msg_controllen = 0;
+		ctlbuf = mp->msg_control;
+
+		while (m && len > 0) {
+			unsigned int tocopy;
+
+			if (len >= m->m_len)
+				tocopy = m->m_len;
+			else {
+				mp->msg_flags |= MSG_CTRUNC;
+				tocopy = len;
+			}
+
+			if ((error = copyout(mtod(m, caddr_t),
+					ctlbuf, tocopy)) != 0)
+				goto out;
+
+			ctlbuf += tocopy;
+			len -= tocopy;
+			m = m->m_next;
+		}
+		mp->msg_controllen = ctlbuf - (caddr_t)mp->msg_control;
+	}
+out:
+	fdrop(fp, td);
+#ifdef KTRACE
+	if (fromsa && KTRPOINT(td, KTR_STRUCT))
+		ktrsockaddr(fromsa);
+#endif
+	if (fromsa)
+		free(fromsa, M_SONAME);
+
+	if (error == 0 && controlp != NULL)  
+		*controlp = control;
+	else  if (control)
+		m_freem(control);
+
+	return (error);
+}
+
+static int
+recvit(td, s, mp, namelenp)
+	struct thread *td;
+	int s;
+	struct msghdr *mp;
+	void *namelenp;
+{
+	int error;
+
+	error = kern_recvit(td, s, mp, UIO_USERSPACE, NULL);
+	if (error)
+		return (error);
+	if (namelenp) {
+		error = copyout(&mp->msg_namelen, namelenp, sizeof (socklen_t));
+#ifdef COMPAT_OLDSOCK
+		if (mp->msg_flags & MSG_COMPAT)
+			error = 0;	/* old recvfrom didn't check */
+#endif
+	}
+	return (error);
+}
+
+int
+recvfrom(td, uap)
+	struct thread *td;
+	struct recvfrom_args /* {
+		int	s;
+		caddr_t	buf;
+		size_t	len;
+		int	flags;
+		struct sockaddr * __restrict	from;
+		socklen_t * __restrict fromlenaddr;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+	int error;
+
+	if (uap->fromlenaddr) {
+		error = copyin(uap->fromlenaddr,
+		    &msg.msg_namelen, sizeof (msg.msg_namelen));
+		if (error)
+			goto done2;
+	} else {
+		msg.msg_namelen = 0;
+	}
+	msg.msg_name = uap->from;
+	msg.msg_iov = &aiov;
+	msg.msg_iovlen = 1;
+	aiov.iov_base = uap->buf;
+	aiov.iov_len = uap->len;
+	msg.msg_control = 0;
+	msg.msg_flags = uap->flags;
+	error = recvit(td, uap->s, &msg, uap->fromlenaddr);
+done2:
+	return(error);
+}
+
+#ifdef COMPAT_OLDSOCK
+int
+orecvfrom(td, uap)
+	struct thread *td;
+	struct recvfrom_args *uap;
+{
+
+	uap->flags |= MSG_COMPAT;
+	return (recvfrom(td, uap));
+}
+#endif
+
+#ifdef COMPAT_OLDSOCK
+int
+orecv(td, uap)
+	struct thread *td;
+	struct orecv_args /* {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+	int error;
+
+	msg.msg_name = 0;
+	msg.msg_namelen = 0;
+	msg.msg_iov = &aiov;
+	msg.msg_iovlen = 1;
+	aiov.iov_base = uap->buf;
+	aiov.iov_len = uap->len;
+	msg.msg_control = 0;
+	msg.msg_flags = uap->flags;
+	error = recvit(td, uap->s, &msg, NULL);
+	return (error);
+}
+
+/*
+ * Old recvmsg.  This code takes advantage of the fact that the old msghdr
+ * overlays the new one, missing only the flags, and with the (old) access
+ * rights where the control fields are now.
+ */
+int
+orecvmsg(td, uap)
+	struct thread *td;
+	struct orecvmsg_args /* {
+		int	s;
+		struct	omsghdr *msg;
+		int	flags;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec *iov;
+	int error;
+
+	error = copyin(uap->msg, &msg, sizeof (struct omsghdr));
+	if (error)
+		return (error);
+	error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
+	if (error)
+		return (error);
+	msg.msg_flags = uap->flags | MSG_COMPAT;
+	msg.msg_iov = iov;
+	error = recvit(td, uap->s, &msg, &uap->msg->msg_namelen);
+	if (msg.msg_controllen && error == 0)
+		error = copyout(&msg.msg_controllen,
+		    &uap->msg->msg_accrightslen, sizeof (int));
+	free(iov, M_IOV);
+	return (error);
+}
+#endif
+
+int
+recvmsg(td, uap)
+	struct thread *td;
+	struct recvmsg_args /* {
+		int	s;
+		struct	msghdr *msg;
+		int	flags;
+	} */ *uap;
+{
+	struct msghdr msg;
+	struct iovec *uiov, *iov;
+	int error;
+
+	error = copyin(uap->msg, &msg, sizeof (msg));
+	if (error)
+		return (error);
+	error = copyiniov(msg.msg_iov, msg.msg_iovlen, &iov, EMSGSIZE);
+	if (error)
+		return (error);
+	msg.msg_flags = uap->flags;
+#ifdef COMPAT_OLDSOCK
+	msg.msg_flags &= ~MSG_COMPAT;
+#endif
+	uiov = msg.msg_iov;
+	msg.msg_iov = iov;
+	error = recvit(td, uap->s, &msg, NULL);
+	if (error == 0) {
+		msg.msg_iov = uiov;
+		error = copyout(&msg, uap->msg, sizeof(msg));
+	}
+	free(iov, M_IOV);
+	return (error);
+}
+
+/* ARGSUSED */
+int
+shutdown(td, uap)
+	struct thread *td;
+	struct shutdown_args /* {
+		int	s;
+		int	how;
+	} */ *uap;
+{
+	struct socket *so;
+	struct file *fp;
+	int error;
+
+	AUDIT_ARG_FD(uap->s);
+	error = getsock(td->td_proc->p_fd, uap->s, &fp, NULL);
+	if (error == 0) {
+		so = fp->f_data;
+		error = soshutdown(so, uap->how);
+		fdrop(fp, td);
+	}
+	return (error);
+}
+
+/* ARGSUSED */
+int
+setsockopt(td, uap)
+	struct thread *td;
+	struct setsockopt_args /* {
+		int	s;
+		int	level;
+		int	name;
+		caddr_t	val;
+		int	valsize;
+	} */ *uap;
+{
+
+	return (kern_setsockopt(td, uap->s, uap->level, uap->name,
+	    uap->val, UIO_USERSPACE, uap->valsize));
+}
+
+int
+kern_setsockopt(td, s, level, name, val, valseg, valsize)
+	struct thread *td;
+	int s;
+	int level;
+	int name;
+	void *val;
+	enum uio_seg valseg;
+	socklen_t valsize;
+{
+	int error;
+	struct socket *so;
+	struct file *fp;
+	struct sockopt sopt;
+
+	if (val == NULL && valsize != 0)
+		return (EFAULT);
+	if ((int)valsize < 0)
+		return (EINVAL);
+
+	sopt.sopt_dir = SOPT_SET;
+	sopt.sopt_level = level;
+	sopt.sopt_name = name;
+	sopt.sopt_val = val;
+	sopt.sopt_valsize = valsize;
+	switch (valseg) {
+	case UIO_USERSPACE:
+		sopt.sopt_td = td;
+		break;
+	case UIO_SYSSPACE:
+		sopt.sopt_td = NULL;
+		break;
+	default:
+		panic("kern_setsockopt called with bad valseg");
+	}
+
+	AUDIT_ARG_FD(s);
+	error = getsock(td->td_proc->p_fd, s, &fp, NULL);
+	if (error == 0) {
+		so = fp->f_data;
+		CURVNET_SET(so->so_vnet);
+		error = sosetopt(so, &sopt);
+		CURVNET_RESTORE();
+		fdrop(fp, td);
+	}
+	return(error);
+}
+
+/* ARGSUSED */
+int
+getsockopt(td, uap)
+	struct thread *td;
+	struct getsockopt_args /* {
+		int	s;
+		int	level;
+		int	name;
+		void * __restrict	val;
+		socklen_t * __restrict avalsize;
+	} */ *uap;
+{
+	socklen_t valsize;
+	int	error;
+
+	if (uap->val) {
+		error = copyin(uap->avalsize, &valsize, sizeof (valsize));
+		if (error)
+			return (error);
+	}
+
+	error = kern_getsockopt(td, uap->s, uap->level, uap->name,
+	    uap->val, UIO_USERSPACE, &valsize);
+
+	if (error == 0)
+		error = copyout(&valsize, uap->avalsize, sizeof (valsize));
+	return (error);
+}
+
+/*
+ * Kernel version of getsockopt.
+ * optval can be a userland or userspace. optlen is always a kernel pointer.
+ */
+int
+kern_getsockopt(td, s, level, name, val, valseg, valsize)
+	struct thread *td;
+	int s;
+	int level;
+	int name;
+	void *val;
+	enum uio_seg valseg;
+	socklen_t *valsize;
+{
+	int error;
+	struct  socket *so;
+	struct file *fp;
+	struct	sockopt sopt;
+
+	if (val == NULL)
+		*valsize = 0;
+	if ((int)*valsize < 0)
+		return (EINVAL);
+
+	sopt.sopt_dir = SOPT_GET;
+	sopt.sopt_level = level;
+	sopt.sopt_name = name;
+	sopt.sopt_val = val;
+	sopt.sopt_valsize = (size_t)*valsize; /* checked non-negative above */
+	switch (valseg) {
+	case UIO_USERSPACE:
+		sopt.sopt_td = td;
+		break;
+	case UIO_SYSSPACE:
+		sopt.sopt_td = NULL;
+		break;
+	default:
+		panic("kern_getsockopt called with bad valseg");
+	}
+
+	AUDIT_ARG_FD(s);
+	error = getsock(td->td_proc->p_fd, s, &fp, NULL);
+	if (error == 0) {
+		so = fp->f_data;
+		CURVNET_SET(so->so_vnet);
+		error = sogetopt(so, &sopt);
+		CURVNET_RESTORE();
+		*valsize = sopt.sopt_valsize;
+		fdrop(fp, td);
+	}
+	return (error);
+}
+
+/*
+ * getsockname1() - Get socket name.
+ */
+/* ARGSUSED */
+static int
+getsockname1(td, uap, compat)
+	struct thread *td;
+	struct getsockname_args /* {
+		int	fdes;
+		struct sockaddr * __restrict asa;
+		socklen_t * __restrict alen;
+	} */ *uap;
+	int compat;
+{
+	struct sockaddr *sa;
+	socklen_t len;
+	int error;
+
+	error = copyin(uap->alen, &len, sizeof(len));
+	if (error)
+		return (error);
+
+	error = kern_getsockname(td, uap->fdes, &sa, &len);
+	if (error)
+		return (error);
+
+	if (len != 0) {
+#ifdef COMPAT_OLDSOCK
+		if (compat)
+			((struct osockaddr *)sa)->sa_family = sa->sa_family;
+#endif
+		error = copyout(sa, uap->asa, (u_int)len);
+	}
+	free(sa, M_SONAME);
+	if (error == 0)
+		error = copyout(&len, uap->alen, sizeof(len));
+	return (error);
+}
+
+int
+kern_getsockname(struct thread *td, int fd, struct sockaddr **sa,
+    socklen_t *alen)
+{
+	struct socket *so;
+	struct file *fp;
+	socklen_t len;
+	int error;
+
+	if (*alen < 0)
+		return (EINVAL);
+
+	AUDIT_ARG_FD(fd);
+	error = getsock(td->td_proc->p_fd, fd, &fp, NULL);
+	if (error)
+		return (error);
+	so = fp->f_data;
+	*sa = NULL;
+	CURVNET_SET(so->so_vnet);
+	error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, sa);
+	CURVNET_RESTORE();
+	if (error)
+		goto bad;
+	if (*sa == NULL)
+		len = 0;
+	else
+		len = MIN(*alen, (*sa)->sa_len);
+	*alen = len;
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_STRUCT))
+		ktrsockaddr(*sa);
+#endif
+bad:
+	fdrop(fp, td);
+	if (error && *sa) {
+		free(*sa, M_SONAME);
+		*sa = NULL;
+	}
+	return (error);
+}
+
+int
+getsockname(td, uap)
+	struct thread *td;
+	struct getsockname_args *uap;
+{
+
+	return (getsockname1(td, uap, 0));
+}
+
+#ifdef COMPAT_OLDSOCK
+int
+ogetsockname(td, uap)
+	struct thread *td;
+	struct getsockname_args *uap;
+{
+
+	return (getsockname1(td, uap, 1));
+}
+#endif /* COMPAT_OLDSOCK */
+
+/*
+ * getpeername1() - Get name of peer for connected socket.
+ */
+/* ARGSUSED */
+static int
+getpeername1(td, uap, compat)
+	struct thread *td;
+	struct getpeername_args /* {
+		int	fdes;
+		struct sockaddr * __restrict	asa;
+		socklen_t * __restrict	alen;
+	} */ *uap;
+	int compat;
+{
+	struct sockaddr *sa;
+	socklen_t len;
+	int error;
+
+	error = copyin(uap->alen, &len, sizeof (len));
+	if (error)
+		return (error);
+
+	error = kern_getpeername(td, uap->fdes, &sa, &len);
+	if (error)
+		return (error);
+
+	if (len != 0) {
+#ifdef COMPAT_OLDSOCK
+		if (compat)
+			((struct osockaddr *)sa)->sa_family = sa->sa_family;
+#endif
+		error = copyout(sa, uap->asa, (u_int)len);
+	}
+	free(sa, M_SONAME);
+	if (error == 0)
+		error = copyout(&len, uap->alen, sizeof(len));
+	return (error);
+}
+
+int
+kern_getpeername(struct thread *td, int fd, struct sockaddr **sa,
+    socklen_t *alen)
+{
+	struct socket *so;
+	struct file *fp;
+	socklen_t len;
+	int error;
+
+	if (*alen < 0)
+		return (EINVAL);
+
+	AUDIT_ARG_FD(fd);
+	error = getsock(td->td_proc->p_fd, fd, &fp, NULL);
+	if (error)
+		return (error);
+	so = fp->f_data;
+	if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
+		error = ENOTCONN;
+		goto done;
+	}
+	*sa = NULL;
+	CURVNET_SET(so->so_vnet);
+	error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, sa);
+	CURVNET_RESTORE();
+	if (error)
+		goto bad;
+	if (*sa == NULL)
+		len = 0;
+	else
+		len = MIN(*alen, (*sa)->sa_len);
+	*alen = len;
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_STRUCT))
+		ktrsockaddr(*sa);
+#endif
+bad:
+	if (error && *sa) {
+		free(*sa, M_SONAME);
+		*sa = NULL;
+	}
+done:
+	fdrop(fp, td);
+	return (error);
+}
+
+int
+getpeername(td, uap)
+	struct thread *td;
+	struct getpeername_args *uap;
+{
+
+	return (getpeername1(td, uap, 0));
+}
+
+#ifdef COMPAT_OLDSOCK
+int
+ogetpeername(td, uap)
+	struct thread *td;
+	struct ogetpeername_args *uap;
+{
+
+	/* XXX uap should have type `getpeername_args *' to begin with. */
+	return (getpeername1(td, (struct getpeername_args *)uap, 1));
+}
+#endif /* COMPAT_OLDSOCK */
+
+int
+sockargs(mp, buf, buflen, type)
+	struct mbuf **mp;
+	caddr_t buf;
+	int buflen, type;
+{
+	struct sockaddr *sa;
+	struct mbuf *m;
+	int error;
+
+	if ((u_int)buflen > MLEN) {
+#ifdef COMPAT_OLDSOCK
+		if (type == MT_SONAME && (u_int)buflen <= 112)
+			buflen = MLEN;		/* unix domain compat. hack */
+		else
+#endif
+			if ((u_int)buflen > MCLBYTES)
+				return (EINVAL);
+	}
+	m = m_get(M_WAIT, type);
+	if ((u_int)buflen > MLEN)
+		MCLGET(m, M_WAIT);
+	m->m_len = buflen;
+	error = copyin(buf, mtod(m, caddr_t), (u_int)buflen);
+	if (error)
+		(void) m_free(m);
+	else {
+		*mp = m;
+		if (type == MT_SONAME) {
+			sa = mtod(m, struct sockaddr *);
+
+#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
+			if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
+				sa->sa_family = sa->sa_len;
+#endif
+			sa->sa_len = buflen;
+		}
+	}
+	return (error);
+}
+
+int
+getsockaddr(namp, uaddr, len)
+	struct sockaddr **namp;
+	caddr_t uaddr;
+	size_t len;
+{
+	struct sockaddr *sa;
+	int error;
+
+	if (len > SOCK_MAXADDRLEN)
+		return (ENAMETOOLONG);
+	if (len < offsetof(struct sockaddr, sa_data[0]))
+		return (EINVAL);
+	sa = malloc(len, M_SONAME, M_WAITOK);
+	error = copyin(uaddr, sa, len);
+	if (error) {
+		free(sa, M_SONAME);
+	} else {
+#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
+		if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
+			sa->sa_family = sa->sa_len;
+#endif
+		sa->sa_len = len;
+		*namp = sa;
+	}
+	return (error);
+}
+
+#include <sys/condvar.h>
+
+struct sendfile_sync {
+	struct mtx	mtx;
+	struct cv	cv;
+	unsigned 	count;
+};
+
+/*
+ * Detach mapped page and release resources back to the system.
+ */
+void
+sf_buf_mext(void *addr, void *args)
+{
+	vm_page_t m;
+	struct sendfile_sync *sfs;
+
+	m = sf_buf_page(args);
+	sf_buf_free(args);
+	vm_page_lock_queues();
+	vm_page_unwire(m, 0);
+	/*
+	 * Check for the object going away on us. This can
+	 * happen since we don't hold a reference to it.
+	 * If so, we're responsible for freeing the page.
+	 */
+	if (m->wire_count == 0 && m->object == NULL)
+		vm_page_free(m);
+	vm_page_unlock_queues();
+	if (addr == NULL)
+		return;
+	sfs = addr;
+	mtx_lock(&sfs->mtx);
+	KASSERT(sfs->count> 0, ("Sendfile sync botchup count == 0"));
+	if (--sfs->count == 0)
+		cv_signal(&sfs->cv);
+	mtx_unlock(&sfs->mtx);
+}
+
+/*
+ * sendfile(2)
+ *
+ * int sendfile(int fd, int s, off_t offset, size_t nbytes,
+ *	 struct sf_hdtr *hdtr, off_t *sbytes, int flags)
+ *
+ * Send a file specified by 'fd' and starting at 'offset' to a socket
+ * specified by 's'. Send only 'nbytes' of the file or until EOF if nbytes ==
+ * 0.  Optionally add a header and/or trailer to the socket output.  If
+ * specified, write the total number of bytes sent into *sbytes.
+ */
+int
+sendfile(struct thread *td, struct sendfile_args *uap)
+{
+
+	return (do_sendfile(td, uap, 0));
+}
+
+static int
+do_sendfile(struct thread *td, struct sendfile_args *uap, int compat)
+{
+	struct sf_hdtr hdtr;
+	struct uio *hdr_uio, *trl_uio;
+	int error;
+
+	hdr_uio = trl_uio = NULL;
+
+	if (uap->hdtr != NULL) {
+		error = copyin(uap->hdtr, &hdtr, sizeof(hdtr));
+		if (error)
+			goto out;
+		if (hdtr.headers != NULL) {
+			error = copyinuio(hdtr.headers, hdtr.hdr_cnt, &hdr_uio);
+			if (error)
+				goto out;
+		}
+		if (hdtr.trailers != NULL) {
+			error = copyinuio(hdtr.trailers, hdtr.trl_cnt, &trl_uio);
+			if (error)
+				goto out;
+
+		}
+	}
+
+	error = kern_sendfile(td, uap, hdr_uio, trl_uio, compat);
+out:
+	if (hdr_uio)
+		free(hdr_uio, M_IOV);
+	if (trl_uio)
+		free(trl_uio, M_IOV);
+	return (error);
+}
+
+#ifdef COMPAT_FREEBSD4
+int
+freebsd4_sendfile(struct thread *td, struct freebsd4_sendfile_args *uap)
+{
+	struct sendfile_args args;
+
+	args.fd = uap->fd;
+	args.s = uap->s;
+	args.offset = uap->offset;
+	args.nbytes = uap->nbytes;
+	args.hdtr = uap->hdtr;
+	args.sbytes = uap->sbytes;
+	args.flags = uap->flags;
+
+	return (do_sendfile(td, &args, 1));
+}
+#endif /* COMPAT_FREEBSD4 */
+
+int
+kern_sendfile(struct thread *td, struct sendfile_args *uap,
+    struct uio *hdr_uio, struct uio *trl_uio, int compat)
+{
+	struct file *sock_fp;
+	struct vnode *vp;
+	struct vm_object *obj = NULL;
+	struct socket *so = NULL;
+	struct mbuf *m = NULL;
+	struct sf_buf *sf;
+	struct vm_page *pg;
+	off_t off, xfsize, fsbytes = 0, sbytes = 0, rem = 0;
+	int error, hdrlen = 0, mnw = 0;
+	int vfslocked;
+	struct sendfile_sync *sfs = NULL;
+
+	/*
+	 * The file descriptor must be a regular file and have a
+	 * backing VM object.
+	 * File offset must be positive.  If it goes beyond EOF
+	 * we send only the header/trailer and no payload data.
+	 */
+	AUDIT_ARG_FD(uap->fd);
+	if ((error = fgetvp_read(td, uap->fd, &vp)) != 0)
+		goto out;
+	vfslocked = VFS_LOCK_GIANT(vp->v_mount);
+	vn_lock(vp, LK_SHARED | LK_RETRY);
+	if (vp->v_type == VREG) {
+		obj = vp->v_object;
+		if (obj != NULL) {
+			/*
+			 * Temporarily increase the backing VM
+			 * object's reference count so that a forced
+			 * reclamation of its vnode does not
+			 * immediately destroy it.
+			 */
+			VM_OBJECT_LOCK(obj);
+			if ((obj->flags & OBJ_DEAD) == 0) {
+				vm_object_reference_locked(obj);
+				VM_OBJECT_UNLOCK(obj);
+			} else {
+				VM_OBJECT_UNLOCK(obj);
+				obj = NULL;
+			}
+		}
+	}
+	VOP_UNLOCK(vp, 0);
+	VFS_UNLOCK_GIANT(vfslocked);
+	if (obj == NULL) {
+		error = EINVAL;
+		goto out;
+	}
+	if (uap->offset < 0) {
+		error = EINVAL;
+		goto out;
+	}
+
+	/*
+	 * The socket must be a stream socket and connected.
+	 * Remember if it a blocking or non-blocking socket.
+	 */
+	if ((error = getsock(td->td_proc->p_fd, uap->s, &sock_fp,
+	    NULL)) != 0)
+		goto out;
+	so = sock_fp->f_data;
+	if (so->so_type != SOCK_STREAM) {
+		error = EINVAL;
+		goto out;
+	}
+	if ((so->so_state & SS_ISCONNECTED) == 0) {
+		error = ENOTCONN;
+		goto out;
+	}
+	/*
+	 * Do not wait on memory allocations but return ENOMEM for
+	 * caller to retry later.
+	 * XXX: Experimental.
+	 */
+	if (uap->flags & SF_MNOWAIT)
+		mnw = 1;
+
+	if (uap->flags & SF_SYNC) {
+		sfs = malloc(sizeof *sfs, M_TEMP, M_WAITOK);
+		memset(sfs, 0, sizeof *sfs);
+		mtx_init(&sfs->mtx, "sendfile", NULL, MTX_DEF);
+		cv_init(&sfs->cv, "sendfile");
+	}
+
+#ifdef MAC
+	error = mac_socket_check_send(td->td_ucred, so);
+	if (error)
+		goto out;
+#endif
+
+	/* If headers are specified copy them into mbufs. */
+	if (hdr_uio != NULL) {
+		hdr_uio->uio_td = td;
+		hdr_uio->uio_rw = UIO_WRITE;
+		if (hdr_uio->uio_resid > 0) {
+			/*
+			 * In FBSD < 5.0 the nbytes to send also included
+			 * the header.  If compat is specified subtract the
+			 * header size from nbytes.
+			 */
+			if (compat) {
+				if (uap->nbytes > hdr_uio->uio_resid)
+					uap->nbytes -= hdr_uio->uio_resid;
+				else
+					uap->nbytes = 0;
+			}
+			m = m_uiotombuf(hdr_uio, (mnw ? M_NOWAIT : M_WAITOK),
+			    0, 0, 0);
+			if (m == NULL) {
+				error = mnw ? EAGAIN : ENOBUFS;
+				goto out;
+			}
+			hdrlen = m_length(m, NULL);
+		}
+	}
+
+	/*
+	 * Protect against multiple writers to the socket.
+	 *
+	 * XXXRW: Historically this has assumed non-interruptibility, so now
+	 * we implement that, but possibly shouldn't.
+	 */
+	(void)sblock(&so->so_snd, SBL_WAIT | SBL_NOINTR);
+
+	/*
+	 * Loop through the pages of the file, starting with the requested
+	 * offset. Get a file page (do I/O if necessary), map the file page
+	 * into an sf_buf, attach an mbuf header to the sf_buf, and queue
+	 * it on the socket.
+	 * This is done in two loops.  The inner loop turns as many pages
+	 * as it can, up to available socket buffer space, without blocking
+	 * into mbufs to have it bulk delivered into the socket send buffer.
+	 * The outer loop checks the state and available space of the socket
+	 * and takes care of the overall progress.
+	 */
+	for (off = uap->offset, rem = uap->nbytes; ; ) {
+		int loopbytes = 0;
+		int space = 0;
+		int done = 0;
+
+		/*
+		 * Check the socket state for ongoing connection,
+		 * no errors and space in socket buffer.
+		 * If space is low allow for the remainder of the
+		 * file to be processed if it fits the socket buffer.
+		 * Otherwise block in waiting for sufficient space
+		 * to proceed, or if the socket is nonblocking, return
+		 * to userland with EAGAIN while reporting how far
+		 * we've come.
+		 * We wait until the socket buffer has significant free
+		 * space to do bulk sends.  This makes good use of file
+		 * system read ahead and allows packet segmentation
+		 * offloading hardware to take over lots of work.  If
+		 * we were not careful here we would send off only one
+		 * sfbuf at a time.
+		 */
+		SOCKBUF_LOCK(&so->so_snd);
+		if (so->so_snd.sb_lowat < so->so_snd.sb_hiwat / 2)
+			so->so_snd.sb_lowat = so->so_snd.sb_hiwat / 2;
+retry_space:
+		if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
+			error = EPIPE;
+			SOCKBUF_UNLOCK(&so->so_snd);
+			goto done;
+		} else if (so->so_error) {
+			error = so->so_error;
+			so->so_error = 0;
+			SOCKBUF_UNLOCK(&so->so_snd);
+			goto done;
+		}
+		space = sbspace(&so->so_snd);
+		if (space < rem &&
+		    (space <= 0 ||
+		     space < so->so_snd.sb_lowat)) {
+			if (so->so_state & SS_NBIO) {
+				SOCKBUF_UNLOCK(&so->so_snd);
+				error = EAGAIN;
+				goto done;
+			}
+			/*
+			 * sbwait drops the lock while sleeping.
+			 * When we loop back to retry_space the
+			 * state may have changed and we retest
+			 * for it.
+			 */
+			error = sbwait(&so->so_snd);
+			/*
+			 * An error from sbwait usually indicates that we've
+			 * been interrupted by a signal. If we've sent anything
+			 * then return bytes sent, otherwise return the error.
+			 */
+			if (error) {
+				SOCKBUF_UNLOCK(&so->so_snd);
+				goto done;
+			}
+			goto retry_space;
+		}
+		SOCKBUF_UNLOCK(&so->so_snd);
+
+		/*
+		 * Reduce space in the socket buffer by the size of
+		 * the header mbuf chain.
+		 * hdrlen is set to 0 after the first loop.
+		 */
+		space -= hdrlen;
+
+		/*
+		 * Loop and construct maximum sized mbuf chain to be bulk
+		 * dumped into socket buffer.
+		 */
+		while(space > loopbytes) {
+			vm_pindex_t pindex;
+			vm_offset_t pgoff;
+			struct mbuf *m0;
+
+			VM_OBJECT_LOCK(obj);
+			/*
+			 * Calculate the amount to transfer.
+			 * Not to exceed a page, the EOF,
+			 * or the passed in nbytes.
+			 */
+			pgoff = (vm_offset_t)(off & PAGE_MASK);
+			xfsize = omin(PAGE_SIZE - pgoff,
+			    obj->un_pager.vnp.vnp_size - uap->offset -
+			    fsbytes - loopbytes);
+			if (uap->nbytes)
+				rem = (uap->nbytes - fsbytes - loopbytes);
+			else
+				rem = obj->un_pager.vnp.vnp_size -
+				    uap->offset - fsbytes - loopbytes;
+			xfsize = omin(rem, xfsize);
+			xfsize = omin(space - loopbytes, xfsize);
+			if (xfsize <= 0) {
+				VM_OBJECT_UNLOCK(obj);
+				done = 1;		/* all data sent */
+				break;
+			}
+
+			/*
+			 * Attempt to look up the page.  Allocate
+			 * if not found or wait and loop if busy.
+			 */
+			pindex = OFF_TO_IDX(off);
+			pg = vm_page_grab(obj, pindex, VM_ALLOC_NOBUSY |
+			    VM_ALLOC_NORMAL | VM_ALLOC_WIRED | VM_ALLOC_RETRY);
+
+			/*
+			 * Check if page is valid for what we need,
+			 * otherwise initiate I/O.
+			 * If we already turned some pages into mbufs,
+			 * send them off before we come here again and
+			 * block.
+			 */
+			if (pg->valid && vm_page_is_valid(pg, pgoff, xfsize))
+				VM_OBJECT_UNLOCK(obj);
+			else if (m != NULL)
+				error = EAGAIN;	/* send what we already got */
+			else if (uap->flags & SF_NODISKIO)
+				error = EBUSY;
+			else {
+				int bsize, resid;
+
+				/*
+				 * Ensure that our page is still around
+				 * when the I/O completes.
+				 */
+				vm_page_io_start(pg);
+				VM_OBJECT_UNLOCK(obj);
+
+				/*
+				 * Get the page from backing store.
+				 */
+				vfslocked = VFS_LOCK_GIANT(vp->v_mount);
+				error = vn_lock(vp, LK_SHARED);
+				if (error != 0)
+					goto after_read;
+				bsize = vp->v_mount->mnt_stat.f_iosize;
+
+				/*
+				 * XXXMAC: Because we don't have fp->f_cred
+				 * here, we pass in NOCRED.  This is probably
+				 * wrong, but is consistent with our original
+				 * implementation.
+				 */
+				error = vn_rdwr(UIO_READ, vp, NULL, MAXBSIZE,
+				    trunc_page(off), UIO_NOCOPY, IO_NODELOCKED |
+				    IO_VMIO | ((MAXBSIZE / bsize) << IO_SEQSHIFT),
+				    td->td_ucred, NOCRED, &resid, td);
+				VOP_UNLOCK(vp, 0);
+			after_read:
+				VFS_UNLOCK_GIANT(vfslocked);
+				VM_OBJECT_LOCK(obj);
+				vm_page_io_finish(pg);
+				if (!error)
+					VM_OBJECT_UNLOCK(obj);
+				mbstat.sf_iocnt++;
+			}
+			if (error) {
+				vm_page_lock_queues();
+				vm_page_unwire(pg, 0);
+				/*
+				 * See if anyone else might know about
+				 * this page.  If not and it is not valid,
+				 * then free it.
+				 */
+				if (pg->wire_count == 0 && pg->valid == 0 &&
+				    pg->busy == 0 && !(pg->oflags & VPO_BUSY) &&
+				    pg->hold_count == 0) {
+					vm_page_free(pg);
+				}
+				vm_page_unlock_queues();
+				VM_OBJECT_UNLOCK(obj);
+				if (error == EAGAIN)
+					error = 0;	/* not a real error */
+				break;
+			}
+
+			/*
+			 * Get a sendfile buf.  We usually wait as long
+			 * as necessary, but this wait can be interrupted.
+			 */
+			if ((sf = sf_buf_alloc(pg,
+			    (mnw ? SFB_NOWAIT : SFB_CATCH))) == NULL) {
+				mbstat.sf_allocfail++;
+				vm_page_lock_queues();
+				vm_page_unwire(pg, 0);
+				/*
+				 * XXX: Not same check as above!?
+				 */
+				if (pg->wire_count == 0 && pg->object == NULL)
+					vm_page_free(pg);
+				vm_page_unlock_queues();
+				error = (mnw ? EAGAIN : EINTR);
+				break;
+			}
+
+			/*
+			 * Get an mbuf and set it up as having
+			 * external storage.
+			 */
+			m0 = m_get((mnw ? M_NOWAIT : M_WAITOK), MT_DATA);
+			if (m0 == NULL) {
+				error = (mnw ? EAGAIN : ENOBUFS);
+				sf_buf_mext((void *)sf_buf_kva(sf), sf);
+				break;
+			}
+			MEXTADD(m0, sf_buf_kva(sf), PAGE_SIZE, sf_buf_mext,
+			    sfs, sf, M_RDONLY, EXT_SFBUF);
+			m0->m_data = (char *)sf_buf_kva(sf) + pgoff;
+			m0->m_len = xfsize;
+
+			/* Append to mbuf chain. */
+			if (m != NULL)
+				m_cat(m, m0);
+			else
+				m = m0;
+
+			/* Keep track of bits processed. */
+			loopbytes += xfsize;
+			off += xfsize;
+
+			if (sfs != NULL) {
+				mtx_lock(&sfs->mtx);
+				sfs->count++;
+				mtx_unlock(&sfs->mtx);
+			}
+		}
+
+		/* Add the buffer chain to the socket buffer. */
+		if (m != NULL) {
+			int mlen, err;
+
+			mlen = m_length(m, NULL);
+			SOCKBUF_LOCK(&so->so_snd);
+			if (so->so_snd.sb_state & SBS_CANTSENDMORE) {
+				error = EPIPE;
+				SOCKBUF_UNLOCK(&so->so_snd);
+				goto done;
+			}
+			SOCKBUF_UNLOCK(&so->so_snd);
+			CURVNET_SET(so->so_vnet);
+			/* Avoid error aliasing. */
+			err = (*so->so_proto->pr_usrreqs->pru_send)
+				    (so, 0, m, NULL, NULL, td);
+			CURVNET_RESTORE();
+			if (err == 0) {
+				/*
+				 * We need two counters to get the
+				 * file offset and nbytes to send
+				 * right:
+				 * - sbytes contains the total amount
+				 *   of bytes sent, including headers.
+				 * - fsbytes contains the total amount
+				 *   of bytes sent from the file.
+				 */
+				sbytes += mlen;
+				fsbytes += mlen;
+				if (hdrlen) {
+					fsbytes -= hdrlen;
+					hdrlen = 0;
+				}
+			} else if (error == 0)
+				error = err;
+			m = NULL;	/* pru_send always consumes */
+		}
+
+		/* Quit outer loop on error or when we're done. */
+		if (done) 
+			break;
+		if (error)
+			goto done;
+	}
+
+	/*
+	 * Send trailers. Wimp out and use writev(2).
+	 */
+	if (trl_uio != NULL) {
+		sbunlock(&so->so_snd);
+		error = kern_writev(td, uap->s, trl_uio);
+		if (error == 0)
+			sbytes += td->td_retval[0];
+		goto out;
+	}
+
+done:
+	sbunlock(&so->so_snd);
+out:
+	/*
+	 * If there was no error we have to clear td->td_retval[0]
+	 * because it may have been set by writev.
+	 */
+	if (error == 0) {
+		td->td_retval[0] = 0;
+	}
+	if (uap->sbytes != NULL) {
+		copyout(&sbytes, uap->sbytes, sizeof(off_t));
+	}
+	if (obj != NULL)
+		vm_object_deallocate(obj);
+	if (vp != NULL) {
+		vfslocked = VFS_LOCK_GIANT(vp->v_mount);
+		vrele(vp);
+		VFS_UNLOCK_GIANT(vfslocked);
+	}
+	if (so)
+		fdrop(sock_fp, td);
+	if (m)
+		m_freem(m);
+
+	if (sfs != NULL) {
+		mtx_lock(&sfs->mtx);
+		if (sfs->count != 0)
+			cv_wait(&sfs->cv, &sfs->mtx);
+		KASSERT(sfs->count == 0, ("sendfile sync still busy"));
+		cv_destroy(&sfs->cv);
+		mtx_destroy(&sfs->mtx);
+		free(sfs, M_TEMP);
+	}
+
+	if (error == ERESTART)
+		error = EINTR;
+
+	return (error);
+}
+
+/*
+ * SCTP syscalls.
+ * Functionality only compiled in if SCTP is defined in the kernel Makefile,
+ * otherwise all return EOPNOTSUPP.
+ * XXX: We should make this loadable one day.
+ */
+int
+sctp_peeloff(td, uap)
+	struct thread *td;
+	struct sctp_peeloff_args /* {
+		int	sd;
+		caddr_t	name;
+	} */ *uap;
+{
+#if (defined(INET) || defined(INET6)) && defined(SCTP)
+	struct filedesc *fdp;
+	struct file *nfp = NULL;
+	int error;
+	struct socket *head, *so;
+	int fd;
+	u_int fflag;
+
+	fdp = td->td_proc->p_fd;
+	AUDIT_ARG_FD(uap->sd);
+	error = fgetsock(td, uap->sd, &head, &fflag);
+	if (error)
+		goto done2;
+	error = sctp_can_peel_off(head, (sctp_assoc_t)uap->name);
+	if (error)
+		goto done2;
+	/*
+	 * At this point we know we do have a assoc to pull
+	 * we proceed to get the fd setup. This may block
+	 * but that is ok.
+	 */
+
+	error = falloc(td, &nfp, &fd);
+	if (error)
+		goto done;
+	td->td_retval[0] = fd;
+
+	CURVNET_SET(head->so_vnet);
+	so = sonewconn(head, SS_ISCONNECTED);
+	if (so == NULL) 
+		goto noconnection;
+	/*
+	 * Before changing the flags on the socket, we have to bump the
+	 * reference count.  Otherwise, if the protocol calls sofree(),
+	 * the socket will be released due to a zero refcount.
+	 */
+        SOCK_LOCK(so);
+        soref(so);                      /* file descriptor reference */
+        SOCK_UNLOCK(so);
+
+	ACCEPT_LOCK();
+
+	TAILQ_REMOVE(&head->so_comp, so, so_list);
+	head->so_qlen--;
+	so->so_state |= (head->so_state & SS_NBIO);
+	so->so_state &= ~SS_NOFDREF;
+	so->so_qstate &= ~SQ_COMP;
+	so->so_head = NULL;
+	ACCEPT_UNLOCK();
+	finit(nfp, fflag, DTYPE_SOCKET, so, &socketops);
+	error = sctp_do_peeloff(head, so, (sctp_assoc_t)uap->name);
+	if (error)
+		goto noconnection;
+	if (head->so_sigio != NULL)
+		fsetown(fgetown(&head->so_sigio), &so->so_sigio);
+
+noconnection:
+	/*
+	 * close the new descriptor, assuming someone hasn't ripped it
+	 * out from under us.
+	 */
+	if (error)
+		fdclose(fdp, nfp, fd, td);
+
+	/*
+	 * Release explicitly held references before returning.
+	 */
+	CURVNET_RESTORE();
+done:
+	if (nfp != NULL)
+		fdrop(nfp, td);
+	fputsock(head);
+done2:
+	return (error);
+#else  /* SCTP */
+	return (EOPNOTSUPP);
+#endif /* SCTP */
+}
+
+int
+sctp_generic_sendmsg (td, uap)
+	struct thread *td;
+	struct sctp_generic_sendmsg_args /* {
+		int sd, 
+		caddr_t msg, 
+		int mlen, 
+		caddr_t to, 
+		__socklen_t tolen, 
+		struct sctp_sndrcvinfo *sinfo, 
+		int flags
+	} */ *uap;
+{
+#if (defined(INET) || defined(INET6)) && defined(SCTP)
+	struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
+	struct socket *so;
+	struct file *fp = NULL;
+	int error = 0, len;
+	struct sockaddr *to = NULL;
+#ifdef KTRACE
+	struct uio *ktruio = NULL;
+#endif
+	struct uio auio;
+	struct iovec iov[1];
+
+	if (uap->sinfo) {
+		error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
+		if (error)
+			return (error);
+		u_sinfo = &sinfo;
+	}
+	if (uap->tolen) {
+		error = getsockaddr(&to, uap->to, uap->tolen);
+		if (error) {
+			to = NULL;
+			goto sctp_bad2;
+		}
+	}
+
+	AUDIT_ARG_FD(uap->sd);
+	error = getsock(td->td_proc->p_fd, uap->sd, &fp, NULL);
+	if (error)
+		goto sctp_bad;
+#ifdef KTRACE
+	if (to && (KTRPOINT(td, KTR_STRUCT)))
+		ktrsockaddr(to);
+#endif
+
+	iov[0].iov_base = uap->msg;
+	iov[0].iov_len = uap->mlen;
+
+	so = (struct socket *)fp->f_data;
+#ifdef MAC
+	error = mac_socket_check_send(td->td_ucred, so);
+	if (error)
+		goto sctp_bad;
+#endif /* MAC */
+
+	auio.uio_iov =  iov;
+	auio.uio_iovcnt = 1;
+	auio.uio_segflg = UIO_USERSPACE;
+	auio.uio_rw = UIO_WRITE;
+	auio.uio_td = td;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	len = auio.uio_resid = uap->mlen;
+	CURVNET_SET(so->so_vnet);
+	error = sctp_lower_sosend(so, to, &auio,
+		    (struct mbuf *)NULL, (struct mbuf *)NULL,
+		    uap->flags, u_sinfo, td);
+	CURVNET_RESTORE();
+	if (error) {
+		if (auio.uio_resid != len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+		/* Generation of SIGPIPE can be controlled per socket. */
+		if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
+		    !(uap->flags & MSG_NOSIGNAL)) {
+			PROC_LOCK(td->td_proc);
+			tdksignal(td, SIGPIPE, NULL);
+			PROC_UNLOCK(td->td_proc);
+		}
+	}
+	if (error == 0)
+		td->td_retval[0] = len - auio.uio_resid;
+#ifdef KTRACE
+	if (ktruio != NULL) {
+		ktruio->uio_resid = td->td_retval[0];
+		ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
+	}
+#endif /* KTRACE */
+sctp_bad:
+	if (fp)
+		fdrop(fp, td);
+sctp_bad2:
+	if (to)
+		free(to, M_SONAME);
+	return (error);
+#else  /* SCTP */
+	return (EOPNOTSUPP);
+#endif /* SCTP */
+}
+
+int
+sctp_generic_sendmsg_iov(td, uap)
+	struct thread *td;
+	struct sctp_generic_sendmsg_iov_args /* {
+		int sd, 
+		struct iovec *iov, 
+		int iovlen, 
+		caddr_t to, 
+		__socklen_t tolen, 
+		struct sctp_sndrcvinfo *sinfo, 
+		int flags
+	} */ *uap;
+{
+#if (defined(INET) || defined(INET6)) && defined(SCTP)
+	struct sctp_sndrcvinfo sinfo, *u_sinfo = NULL;
+	struct socket *so;
+	struct file *fp = NULL;
+	int error=0, len, i;
+	struct sockaddr *to = NULL;
+#ifdef KTRACE
+	struct uio *ktruio = NULL;
+#endif
+	struct uio auio;
+	struct iovec *iov, *tiov;
+
+	if (uap->sinfo) {
+		error = copyin(uap->sinfo, &sinfo, sizeof (sinfo));
+		if (error)
+			return (error);
+		u_sinfo = &sinfo;
+	}
+	if (uap->tolen) {
+		error = getsockaddr(&to, uap->to, uap->tolen);
+		if (error) {
+			to = NULL;
+			goto sctp_bad2;
+		}
+	}
+
+	AUDIT_ARG_FD(uap->sd);
+	error = getsock(td->td_proc->p_fd, uap->sd, &fp, NULL);
+	if (error)
+		goto sctp_bad1;
+
+#ifdef COMPAT_FREEBSD32
+	if (SV_CURPROC_FLAG(SV_ILP32))
+		error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
+		    uap->iovlen, &iov, EMSGSIZE);
+	else
+#endif
+		error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
+	if (error)
+		goto sctp_bad1;
+#ifdef KTRACE
+	if (to && (KTRPOINT(td, KTR_STRUCT)))
+		ktrsockaddr(to);
+#endif
+
+	so = (struct socket *)fp->f_data;
+#ifdef MAC
+	error = mac_socket_check_send(td->td_ucred, so);
+	if (error)
+		goto sctp_bad;
+#endif /* MAC */
+
+	auio.uio_iov = iov;
+	auio.uio_iovcnt = uap->iovlen;
+	auio.uio_segflg = UIO_USERSPACE;
+	auio.uio_rw = UIO_WRITE;
+	auio.uio_td = td;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	tiov = iov;
+	for (i = 0; i <uap->iovlen; i++, tiov++) {
+		if ((auio.uio_resid += tiov->iov_len) < 0) {
+			error = EINVAL;
+			goto sctp_bad;
+		}
+	}
+	len = auio.uio_resid;
+	CURVNET_SET(so->so_vnet);
+	error = sctp_lower_sosend(so, to, &auio,
+		    (struct mbuf *)NULL, (struct mbuf *)NULL,
+		    uap->flags, u_sinfo, td);
+	CURVNET_RESTORE();
+	if (error) {
+		if (auio.uio_resid != len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+		/* Generation of SIGPIPE can be controlled per socket */
+		if (error == EPIPE && !(so->so_options & SO_NOSIGPIPE) &&
+		    !(uap->flags & MSG_NOSIGNAL)) {
+			PROC_LOCK(td->td_proc);
+			tdksignal(td, SIGPIPE, NULL);
+			PROC_UNLOCK(td->td_proc);
+		}
+	}
+	if (error == 0)
+		td->td_retval[0] = len - auio.uio_resid;
+#ifdef KTRACE
+	if (ktruio != NULL) {
+		ktruio->uio_resid = td->td_retval[0];
+		ktrgenio(uap->sd, UIO_WRITE, ktruio, error);
+	}
+#endif /* KTRACE */
+sctp_bad:
+	free(iov, M_IOV);
+sctp_bad1:
+	if (fp)
+		fdrop(fp, td);
+sctp_bad2:
+	if (to)
+		free(to, M_SONAME);
+	return (error);
+#else  /* SCTP */
+	return (EOPNOTSUPP);
+#endif /* SCTP */
+}
+
+int
+sctp_generic_recvmsg(td, uap)
+	struct thread *td;
+	struct sctp_generic_recvmsg_args /* {
+		int sd, 
+		struct iovec *iov, 
+		int iovlen,
+		struct sockaddr *from, 
+		__socklen_t *fromlenaddr,
+		struct sctp_sndrcvinfo *sinfo, 
+		int *msg_flags
+	} */ *uap;
+{
+#if (defined(INET) || defined(INET6)) && defined(SCTP)
+	u_int8_t sockbufstore[256];
+	struct uio auio;
+	struct iovec *iov, *tiov;
+	struct sctp_sndrcvinfo sinfo;
+	struct socket *so;
+	struct file *fp = NULL;
+	struct sockaddr *fromsa;
+	int fromlen;
+	int len, i, msg_flags;
+	int error = 0;
+#ifdef KTRACE
+	struct uio *ktruio = NULL;
+#endif
+
+	AUDIT_ARG_FD(uap->sd);
+	error = getsock(td->td_proc->p_fd, uap->sd, &fp, NULL);
+	if (error) {
+		return (error);
+	}
+#ifdef COMPAT_FREEBSD32
+	if (SV_CURPROC_FLAG(SV_ILP32))
+		error = freebsd32_copyiniov((struct iovec32 *)uap->iov,
+		    uap->iovlen, &iov, EMSGSIZE);
+	else
+#endif
+		error = copyiniov(uap->iov, uap->iovlen, &iov, EMSGSIZE);
+	if (error)
+		goto out1;
+
+	so = fp->f_data;
+#ifdef MAC
+	error = mac_socket_check_receive(td->td_ucred, so);
+	if (error) {
+		goto out;
+	}
+#endif /* MAC */
+
+	if (uap->fromlenaddr) {
+		error = copyin(uap->fromlenaddr,
+		    &fromlen, sizeof (fromlen));
+		if (error) {
+			goto out;
+		}
+	} else {
+		fromlen = 0;
+	}
+	if (uap->msg_flags) {
+		error = copyin(uap->msg_flags, &msg_flags, sizeof (int));
+		if (error) {
+			goto out;
+		}
+	} else {
+		msg_flags = 0;
+	}
+	auio.uio_iov = iov;
+	auio.uio_iovcnt = uap->iovlen;
+  	auio.uio_segflg = UIO_USERSPACE;
+	auio.uio_rw = UIO_READ;
+	auio.uio_td = td;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	tiov = iov;
+	for (i = 0; i <uap->iovlen; i++, tiov++) {
+		if ((auio.uio_resid += tiov->iov_len) < 0) {
+			error = EINVAL;
+			goto out;
+		}
+	}
+	len = auio.uio_resid;
+	fromsa = (struct sockaddr *)sockbufstore;
+
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_GENIO))
+		ktruio = cloneuio(&auio);
+#endif /* KTRACE */
+	memset(&sinfo, 0, sizeof(struct sctp_sndrcvinfo));
+	CURVNET_SET(so->so_vnet);
+	error = sctp_sorecvmsg(so, &auio, (struct mbuf **)NULL,
+		    fromsa, fromlen, &msg_flags,
+		    (struct sctp_sndrcvinfo *)&sinfo, 1);
+	CURVNET_RESTORE();
+	if (error) {
+		if (auio.uio_resid != (int)len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+	} else {
+		if (uap->sinfo)
+			error = copyout(&sinfo, uap->sinfo, sizeof (sinfo));
+	}
+#ifdef KTRACE
+	if (ktruio != NULL) {
+		ktruio->uio_resid = (int)len - auio.uio_resid;
+		ktrgenio(uap->sd, UIO_READ, ktruio, error);
+	}
+#endif /* KTRACE */
+	if (error)
+		goto out;
+	td->td_retval[0] = (int)len - auio.uio_resid;
+
+	if (fromlen && uap->from) {
+		len = fromlen;
+		if (len <= 0 || fromsa == 0)
+			len = 0;
+		else {
+			len = MIN(len, fromsa->sa_len);
+			error = copyout(fromsa, uap->from, (unsigned)len);
+			if (error)
+				goto out;
+		}
+		error = copyout(&len, uap->fromlenaddr, sizeof (socklen_t));
+		if (error) {
+			goto out;
+		}
+	}
+#ifdef KTRACE
+	if (KTRPOINT(td, KTR_STRUCT))
+		ktrsockaddr(fromsa);
+#endif
+	if (uap->msg_flags) {
+		error = copyout(&msg_flags, uap->msg_flags, sizeof (int));
+		if (error) {
+			goto out;
+		}
+	}
+out:
+	free(iov, M_IOV);
+out1:
+	if (fp) 
+		fdrop(fp, td);
+
+	return (error);
+#else  /* SCTP */
+	return (EOPNOTSUPP);
+#endif /* SCTP */
+}
+#endif /* __rtems__ */