BSD 4.4 Lite Kernel Sources

1 files changed, 1217 insertions, 0 deletions

diff --git a/sys/kern/uipc_syscalls.c b/sys/kern/uipc_syscalls.c
new file mode 100644
index 000000000000..89b7ffdf1960
--- /dev/null
+++ b/sys/kern/uipc_syscalls.c
@@ -0,0 +1,1217 @@
+/*
+ * Copyright (c) 1982, 1986, 1989, 1990, 1993
+ *	The Regents of the University of California.  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.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 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/param.h>
+#include <sys/filedesc.h>
+#include <sys/proc.h>
+#include <sys/file.h>
+#include <sys/buf.h>
+#include <sys/malloc.h>
+#include <sys/mbuf.h>
+#include <sys/protosw.h>
+#include <sys/socket.h>
+#include <sys/socketvar.h>
+#ifdef KTRACE
+#include <sys/ktrace.h>
+#endif
+
+/*
+ * System call interface to the socket abstraction.
+ */
+#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
+#define COMPAT_OLDSOCK
+#endif
+
+extern	struct fileops socketops;
+
+struct socket_args {
+	int	domain;
+	int	type;
+	int	protocol;
+};
+socket(p, uap, retval)
+	struct proc *p;
+	register struct socket_args *uap;
+	int *retval;
+{
+	struct filedesc *fdp = p->p_fd;
+	struct socket *so;
+	struct file *fp;
+	int fd, error;
+
+	if (error = falloc(p, &fp, &fd))
+		return (error);
+	fp->f_flag = FREAD|FWRITE;
+	fp->f_type = DTYPE_SOCKET;
+	fp->f_ops = &socketops;
+	if (error = socreate(uap->domain, &so, uap->type, uap->protocol)) {
+		fdp->fd_ofiles[fd] = 0;
+		ffree(fp);
+	} else {
+		fp->f_data = (caddr_t)so;
+		*retval = fd;
+	}
+	return (error);
+}
+
+struct bind_args {
+	int	s;
+	caddr_t	name;
+	int	namelen;
+};
+/* ARGSUSED */
+bind(p, uap, retval)
+	struct proc *p;
+	register struct bind_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	struct mbuf *nam;
+	int error;
+
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	if (error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME))
+		return (error);
+	error = sobind((struct socket *)fp->f_data, nam);
+	m_freem(nam);
+	return (error);
+}
+
+struct listen_args {
+	int	s;
+	int	backlog;
+};
+/* ARGSUSED */
+listen(p, uap, retval)
+	struct proc *p;
+	register struct listen_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	int error;
+
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	return (solisten((struct socket *)fp->f_data, uap->backlog));
+}
+
+struct accept_args {
+	int	s;
+	caddr_t	name;
+	int	*anamelen;
+#ifdef COMPAT_OLDSOCK
+	int	compat_43;	/* pseudo */
+#endif
+};
+
+#ifdef COMPAT_OLDSOCK
+accept(p, uap, retval)
+	struct proc *p;
+	struct accept_args *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 0;
+	return (accept1(p, uap, retval));
+}
+
+oaccept(p, uap, retval)
+	struct proc *p;
+	struct accept_args *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 1;
+	return (accept1(p, uap, retval));
+}
+#else /* COMPAT_OLDSOCK */
+
+#define	accept1	accept
+#endif
+
+accept1(p, uap, retval)
+	struct proc *p;
+	register struct accept_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	struct mbuf *nam;
+	int namelen, error, s;
+	register struct socket *so;
+
+	if (uap->name && (error = copyin((caddr_t)uap->anamelen,
+	    (caddr_t)&namelen, sizeof (namelen))))
+		return (error);
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	s = splnet();
+	so = (struct socket *)fp->f_data;
+	if ((so->so_options & SO_ACCEPTCONN) == 0) {
+		splx(s);
+		return (EINVAL);
+	}
+	if ((so->so_state & SS_NBIO) && so->so_qlen == 0) {
+		splx(s);
+		return (EWOULDBLOCK);
+	}
+	while (so->so_qlen == 0 && so->so_error == 0) {
+		if (so->so_state & SS_CANTRCVMORE) {
+			so->so_error = ECONNABORTED;
+			break;
+		}
+		if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
+		    netcon, 0)) {
+			splx(s);
+			return (error);
+		}
+	}
+	if (so->so_error) {
+		error = so->so_error;
+		so->so_error = 0;
+		splx(s);
+		return (error);
+	}
+	if (error = falloc(p, &fp, retval)) {
+		splx(s);
+		return (error);
+	}
+	{ struct socket *aso = so->so_q;
+	  if (soqremque(aso, 1) == 0)
+		panic("accept");
+	  so = aso;
+	}
+	fp->f_type = DTYPE_SOCKET;
+	fp->f_flag = FREAD|FWRITE;
+	fp->f_ops = &socketops;
+	fp->f_data = (caddr_t)so;
+	nam = m_get(M_WAIT, MT_SONAME);
+	(void) soaccept(so, nam);
+	if (uap->name) {
+#ifdef COMPAT_OLDSOCK
+		if (uap->compat_43)
+			mtod(nam, struct osockaddr *)->sa_family =
+			    mtod(nam, struct sockaddr *)->sa_family;
+#endif
+		if (namelen > nam->m_len)
+			namelen = nam->m_len;
+		/* SHOULD COPY OUT A CHAIN HERE */
+		if ((error = copyout(mtod(nam, caddr_t), (caddr_t)uap->name,
+		    (u_int)namelen)) == 0)
+			error = copyout((caddr_t)&namelen,
+			    (caddr_t)uap->anamelen, sizeof (*uap->anamelen));
+	}
+	m_freem(nam);
+	splx(s);
+	return (error);
+}
+
+struct connect_args {
+	int	s;
+	caddr_t	name;
+	int	namelen;
+};
+/* ARGSUSED */
+connect(p, uap, retval)
+	struct proc *p;
+	register struct connect_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	register struct socket *so;
+	struct mbuf *nam;
+	int error, s;
+
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	so = (struct socket *)fp->f_data;
+	if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING))
+		return (EALREADY);
+	if (error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME))
+		return (error);
+	error = soconnect(so, nam);
+	if (error)
+		goto bad;
+	if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
+		m_freem(nam);
+		return (EINPROGRESS);
+	}
+	s = splnet();
+	while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0)
+		if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
+		    netcon, 0))
+			break;
+	if (error == 0) {
+		error = so->so_error;
+		so->so_error = 0;
+	}
+	splx(s);
+bad:
+	so->so_state &= ~SS_ISCONNECTING;
+	m_freem(nam);
+	if (error == ERESTART)
+		error = EINTR;
+	return (error);
+}
+
+struct socketpair_args {
+	int	domain;
+	int	type;
+	int	protocol;
+	int	*rsv;
+};
+socketpair(p, uap, retval)
+	struct proc *p;
+	register struct socketpair_args *uap;
+	int retval[];
+{
+	register struct filedesc *fdp = p->p_fd;
+	struct file *fp1, *fp2;
+	struct socket *so1, *so2;
+	int fd, error, sv[2];
+
+	if (error = socreate(uap->domain, &so1, uap->type, uap->protocol))
+		return (error);
+	if (error = socreate(uap->domain, &so2, uap->type, uap->protocol))
+		goto free1;
+	if (error = falloc(p, &fp1, &fd))
+		goto free2;
+	sv[0] = fd;
+	fp1->f_flag = FREAD|FWRITE;
+	fp1->f_type = DTYPE_SOCKET;
+	fp1->f_ops = &socketops;
+	fp1->f_data = (caddr_t)so1;
+	if (error = falloc(p, &fp2, &fd))
+		goto free3;
+	fp2->f_flag = FREAD|FWRITE;
+	fp2->f_type = DTYPE_SOCKET;
+	fp2->f_ops = &socketops;
+	fp2->f_data = (caddr_t)so2;
+	sv[1] = fd;
+	if (error = soconnect2(so1, so2))
+		goto free4;
+	if (uap->type == SOCK_DGRAM) {
+		/*
+		 * Datagram socket connection is asymmetric.
+		 */
+		 if (error = soconnect2(so2, so1))
+			goto free4;
+	}
+	error = copyout((caddr_t)sv, (caddr_t)uap->rsv, 2 * sizeof (int));
+	retval[0] = sv[0];		/* XXX ??? */
+	retval[1] = sv[1];		/* XXX ??? */
+	return (error);
+free4:
+	ffree(fp2);
+	fdp->fd_ofiles[sv[1]] = 0;
+free3:
+	ffree(fp1);
+	fdp->fd_ofiles[sv[0]] = 0;
+free2:
+	(void)soclose(so2);
+free1:
+	(void)soclose(so1);
+	return (error);
+}
+
+struct sendto_args {
+	int	s;
+	caddr_t	buf;
+	size_t	len;
+	int	flags;
+	caddr_t	to;
+	int	tolen;
+};
+sendto(p, uap, retval)
+	struct proc *p;
+	register struct sendto_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+
+	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;
+	return (sendit(p, uap->s, &msg, uap->flags, retval));
+}
+
+#ifdef COMPAT_OLDSOCK
+struct osend_args {
+	int	s;
+	caddr_t	buf;
+	int	len;
+	int	flags;
+};
+osend(p, uap, retval)
+	struct proc *p;
+	register struct osend_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+
+	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;
+	return (sendit(p, uap->s, &msg, uap->flags, retval));
+}
+
+#define MSG_COMPAT	0x8000
+struct osendmsg_args {
+	int	s;
+	caddr_t	msg;
+	int	flags;
+};
+osendmsg(p, uap, retval)
+	struct proc *p;
+	register struct osendmsg_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov[UIO_SMALLIOV], *iov;
+	int error;
+
+	if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (struct omsghdr)))
+		return (error);
+	if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
+		if ((u_int)msg.msg_iovlen >= UIO_MAXIOV)
+			return (EMSGSIZE);
+		MALLOC(iov, struct iovec *,
+		      sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV, 
+		      M_WAITOK);
+	} else
+		iov = aiov;
+	if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
+	    (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))
+		goto done;
+	msg.msg_flags = MSG_COMPAT;
+	msg.msg_iov = iov;
+	error = sendit(p, uap->s, &msg, uap->flags, retval);
+done:
+	if (iov != aiov)
+		FREE(iov, M_IOV);
+	return (error);
+}
+#endif
+
+struct sendmsg_args {
+	int	s;
+	caddr_t	msg;
+	int	flags;
+};
+sendmsg(p, uap, retval)
+	struct proc *p;
+	register struct sendmsg_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov[UIO_SMALLIOV], *iov;
+	int error;
+
+	if (error = copyin(uap->msg, (caddr_t)&msg, sizeof (msg)))
+		return (error);
+	if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
+		if ((u_int)msg.msg_iovlen >= UIO_MAXIOV)
+			return (EMSGSIZE);
+		MALLOC(iov, struct iovec *,
+		       sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
+		       M_WAITOK);
+	} else
+		iov = aiov;
+	if (msg.msg_iovlen &&
+	    (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
+	    (unsigned)(msg.msg_iovlen * sizeof (struct iovec)))))
+		goto done;
+	msg.msg_iov = iov;
+#ifdef COMPAT_OLDSOCK
+	msg.msg_flags = 0;
+#endif
+	error = sendit(p, uap->s, &msg, uap->flags, retval);
+done:
+	if (iov != aiov)
+		FREE(iov, M_IOV);
+	return (error);
+}
+
+sendit(p, s, mp, flags, retsize)
+	register struct proc *p;
+	int s;
+	register struct msghdr *mp;
+	int flags, *retsize;
+{
+	struct file *fp;
+	struct uio auio;
+	register struct iovec *iov;
+	register int i;
+	struct mbuf *to, *control;
+	int len, error;
+#ifdef KTRACE
+	struct iovec *ktriov = NULL;
+#endif
+	
+	if (error = getsock(p->p_fd, s, &fp))
+		return (error);
+	auio.uio_iov = mp->msg_iov;
+	auio.uio_iovcnt = mp->msg_iovlen;
+	auio.uio_segflg = UIO_USERSPACE;
+	auio.uio_rw = UIO_WRITE;
+	auio.uio_procp = p;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	iov = mp->msg_iov;
+	for (i = 0; i < mp->msg_iovlen; i++, iov++) {
+		if (iov->iov_len < 0)
+			return (EINVAL);
+		if ((auio.uio_resid += iov->iov_len) < 0)
+			return (EINVAL);
+	}
+	if (mp->msg_name) {
+		if (error = sockargs(&to, mp->msg_name, mp->msg_namelen,
+		    MT_SONAME))
+			return (error);
+	} else
+		to = 0;
+	if (mp->msg_control) {
+		if (mp->msg_controllen < sizeof(struct cmsghdr)
+#ifdef COMPAT_OLDSOCK
+		    && mp->msg_flags != MSG_COMPAT
+#endif
+		) {
+			error = EINVAL;
+			goto bad;
+		}
+		if (error = sockargs(&control, mp->msg_control,
+		    mp->msg_controllen, MT_CONTROL))
+			goto bad;
+#ifdef COMPAT_OLDSOCK
+		if (mp->msg_flags == MSG_COMPAT) {
+			register struct cmsghdr *cm;
+
+			M_PREPEND(control, sizeof(*cm), M_WAIT);
+			if (control == 0) {
+				error = ENOBUFS;
+				goto bad;
+			} else {
+				cm = mtod(control, struct cmsghdr *);
+				cm->cmsg_len = control->m_len;
+				cm->cmsg_level = SOL_SOCKET;
+				cm->cmsg_type = SCM_RIGHTS;
+			}
+		}
+#endif
+	} else
+		control = 0;
+#ifdef KTRACE
+	if (KTRPOINT(p, KTR_GENIO)) {
+		int iovlen = auio.uio_iovcnt * sizeof (struct iovec);
+
+		MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
+		bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen);
+	}
+#endif
+	len = auio.uio_resid;
+	if (error = sosend((struct socket *)fp->f_data, to, &auio,
+	    (struct mbuf *)0, control, flags)) {
+		if (auio.uio_resid != len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+		if (error == EPIPE)
+			psignal(p, SIGPIPE);
+	}
+	if (error == 0)
+		*retsize = len - auio.uio_resid;
+#ifdef KTRACE
+	if (ktriov != NULL) {
+		if (error == 0)
+			ktrgenio(p->p_tracep, s, UIO_WRITE,
+				ktriov, *retsize, error);
+		FREE(ktriov, M_TEMP);
+	}
+#endif
+bad:
+	if (to)
+		m_freem(to);
+	return (error);
+}
+
+struct recvfrom_args {
+	int	s;
+	caddr_t	buf;
+	size_t	len;
+	int	flags;
+	caddr_t	from;
+	int	*fromlenaddr;
+};
+
+#ifdef COMPAT_OLDSOCK
+orecvfrom(p, uap, retval)
+	struct proc *p;
+	struct recvfrom_args *uap;
+	int *retval;
+{
+
+	uap->flags |= MSG_COMPAT;
+	return (recvfrom(p, uap, retval));
+}
+#endif
+
+recvfrom(p, uap, retval)
+	struct proc *p;
+	register struct recvfrom_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+	int error;
+
+	if (uap->fromlenaddr) {
+		if (error = copyin((caddr_t)uap->fromlenaddr,
+		    (caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen)))
+			return (error);
+	} 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;
+	return (recvit(p, uap->s, &msg, (caddr_t)uap->fromlenaddr, retval));
+}
+
+#ifdef COMPAT_OLDSOCK
+struct orecv_args {
+	int	s;
+	caddr_t	buf;
+	int	len;
+	int	flags;
+};
+orecv(p, uap, retval)
+	struct proc *p;
+	register struct orecv_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov;
+
+	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;
+	return (recvit(p, uap->s, &msg, (caddr_t)0, retval));
+}
+
+/*
+ * 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.
+ */
+struct orecvmsg_args {
+	int	s;
+	struct	omsghdr *msg;
+	int	flags;
+};
+orecvmsg(p, uap, retval)
+	struct proc *p;
+	register struct orecvmsg_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov[UIO_SMALLIOV], *iov;
+	int error;
+
+	if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg,
+	    sizeof (struct omsghdr)))
+		return (error);
+	if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
+		if ((u_int)msg.msg_iovlen >= UIO_MAXIOV)
+			return (EMSGSIZE);
+		MALLOC(iov, struct iovec *,
+		      sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
+		      M_WAITOK);
+	} else
+		iov = aiov;
+	msg.msg_flags = uap->flags | MSG_COMPAT;
+	if (error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
+	    (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))
+		goto done;
+	msg.msg_iov = iov;
+	error = recvit(p, uap->s, &msg, (caddr_t)&uap->msg->msg_namelen, retval);
+
+	if (msg.msg_controllen && error == 0)
+		error = copyout((caddr_t)&msg.msg_controllen,
+		    (caddr_t)&uap->msg->msg_accrightslen, sizeof (int));
+done:
+	if (iov != aiov)
+		FREE(iov, M_IOV);
+	return (error);
+}
+#endif
+
+struct recvmsg_args {
+	int	s;
+	struct	msghdr *msg;
+	int	flags;
+};
+recvmsg(p, uap, retval)
+	struct proc *p;
+	register struct recvmsg_args *uap;
+	int *retval;
+{
+	struct msghdr msg;
+	struct iovec aiov[UIO_SMALLIOV], *uiov, *iov;
+	register int error;
+
+	if (error = copyin((caddr_t)uap->msg, (caddr_t)&msg, sizeof (msg)))
+		return (error);
+	if ((u_int)msg.msg_iovlen >= UIO_SMALLIOV) {
+		if ((u_int)msg.msg_iovlen >= UIO_MAXIOV)
+			return (EMSGSIZE);
+		MALLOC(iov, struct iovec *,
+		       sizeof(struct iovec) * (u_int)msg.msg_iovlen, M_IOV,
+		       M_WAITOK);
+	} else
+		iov = aiov;
+#ifdef COMPAT_OLDSOCK
+	msg.msg_flags = uap->flags &~ MSG_COMPAT;
+#else
+	msg.msg_flags = uap->flags;
+#endif
+	uiov = msg.msg_iov;
+	msg.msg_iov = iov;
+	if (error = copyin((caddr_t)uiov, (caddr_t)iov,
+	    (unsigned)(msg.msg_iovlen * sizeof (struct iovec))))
+		goto done;
+	if ((error = recvit(p, uap->s, &msg, (caddr_t)0, retval)) == 0) {
+		msg.msg_iov = uiov;
+		error = copyout((caddr_t)&msg, (caddr_t)uap->msg, sizeof(msg));
+	}
+done:
+	if (iov != aiov)
+		FREE(iov, M_IOV);
+	return (error);
+}
+
+recvit(p, s, mp, namelenp, retsize)
+	register struct proc *p;
+	int s;
+	register struct msghdr *mp;
+	caddr_t namelenp;
+	int *retsize;
+{
+	struct file *fp;
+	struct uio auio;
+	register struct iovec *iov;
+	register int i;
+	int len, error;
+	struct mbuf *from = 0, *control = 0;
+#ifdef KTRACE
+	struct iovec *ktriov = NULL;
+#endif
+	
+	if (error = getsock(p->p_fd, s, &fp))
+		return (error);
+	auio.uio_iov = mp->msg_iov;
+	auio.uio_iovcnt = mp->msg_iovlen;
+	auio.uio_segflg = UIO_USERSPACE;
+	auio.uio_rw = UIO_READ;
+	auio.uio_procp = p;
+	auio.uio_offset = 0;			/* XXX */
+	auio.uio_resid = 0;
+	iov = mp->msg_iov;
+	for (i = 0; i < mp->msg_iovlen; i++, iov++) {
+		if (iov->iov_len < 0)
+			return (EINVAL);
+		if ((auio.uio_resid += iov->iov_len) < 0)
+			return (EINVAL);
+	}
+#ifdef KTRACE
+	if (KTRPOINT(p, KTR_GENIO)) {
+		int iovlen = auio.uio_iovcnt * sizeof (struct iovec);
+
+		MALLOC(ktriov, struct iovec *, iovlen, M_TEMP, M_WAITOK);
+		bcopy((caddr_t)auio.uio_iov, (caddr_t)ktriov, iovlen);
+	}
+#endif
+	len = auio.uio_resid;
+	if (error = soreceive((struct socket *)fp->f_data, &from, &auio,
+	    (struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0,
+	    &mp->msg_flags)) {
+		if (auio.uio_resid != len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
+	}
+#ifdef KTRACE
+	if (ktriov != NULL) {
+		if (error == 0)
+			ktrgenio(p->p_tracep, s, UIO_READ,
+				ktriov, len - auio.uio_resid, error);
+		FREE(ktriov, M_TEMP);
+	}
+#endif
+	if (error)
+		goto out;
+	*retsize = len - auio.uio_resid;
+	if (mp->msg_name) {
+		len = mp->msg_namelen;
+		if (len <= 0 || from == 0)
+			len = 0;
+		else {
+#ifdef COMPAT_OLDSOCK
+			if (mp->msg_flags & MSG_COMPAT)
+				mtod(from, struct osockaddr *)->sa_family =
+				    mtod(from, struct sockaddr *)->sa_family;
+#endif
+			if (len > from->m_len)
+				len = from->m_len;
+			/* else if len < from->m_len ??? */
+			if (error = copyout(mtod(from, caddr_t),
+			    (caddr_t)mp->msg_name, (unsigned)len))
+				goto out;
+		}
+		mp->msg_namelen = len;
+		if (namelenp &&
+		    (error = copyout((caddr_t)&len, namelenp, sizeof (int)))) {
+#ifdef COMPAT_OLDSOCK
+			if (mp->msg_flags & MSG_COMPAT)
+				error = 0;	/* old recvfrom didn't check */
+			else
+#endif
+			goto out;
+		}
+	}
+	if (mp->msg_control) {
+#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;
+		if (len <= 0 || control == 0)
+			len = 0;
+		else {
+			if (len >= control->m_len)
+				len = control->m_len;
+			else
+				mp->msg_flags |= MSG_CTRUNC;
+			error = copyout((caddr_t)mtod(control, caddr_t),
+			    (caddr_t)mp->msg_control, (unsigned)len);
+		}
+		mp->msg_controllen = len;
+	}
+out:
+	if (from)
+		m_freem(from);
+	if (control)
+		m_freem(control);
+	return (error);
+}
+
+struct shutdown_args {
+	int	s;
+	int	how;
+};
+/* ARGSUSED */
+shutdown(p, uap, retval)
+	struct proc *p;
+	register struct shutdown_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	int error;
+
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	return (soshutdown((struct socket *)fp->f_data, uap->how));
+}
+
+struct setsockopt_args {
+	int	s;
+	int	level;
+	int	name;
+	caddr_t	val;
+	int	valsize;
+};
+/* ARGSUSED */
+setsockopt(p, uap, retval)
+	struct proc *p;
+	register struct setsockopt_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	struct mbuf *m = NULL;
+	int error;
+
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	if (uap->valsize > MLEN)
+		return (EINVAL);
+	if (uap->val) {
+		m = m_get(M_WAIT, MT_SOOPTS);
+		if (m == NULL)
+			return (ENOBUFS);
+		if (error = copyin(uap->val, mtod(m, caddr_t),
+		    (u_int)uap->valsize)) {
+			(void) m_free(m);
+			return (error);
+		}
+		m->m_len = uap->valsize;
+	}
+	return (sosetopt((struct socket *)fp->f_data, uap->level,
+	    uap->name, m));
+}
+
+struct getsockopt_args {
+	int	s;
+	int	level;
+	int	name;
+	caddr_t	val;
+	int	*avalsize;
+};
+/* ARGSUSED */
+getsockopt(p, uap, retval)
+	struct proc *p;
+	register struct getsockopt_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	struct mbuf *m = NULL;
+	int valsize, error;
+
+	if (error = getsock(p->p_fd, uap->s, &fp))
+		return (error);
+	if (uap->val) {
+		if (error = copyin((caddr_t)uap->avalsize, (caddr_t)&valsize,
+		    sizeof (valsize)))
+			return (error);
+	} else
+		valsize = 0;
+	if ((error = sogetopt((struct socket *)fp->f_data, uap->level,
+	    uap->name, &m)) == 0 && uap->val && valsize && m != NULL) {
+		if (valsize > m->m_len)
+			valsize = m->m_len;
+		error = copyout(mtod(m, caddr_t), uap->val, (u_int)valsize);
+		if (error == 0)
+			error = copyout((caddr_t)&valsize,
+			    (caddr_t)uap->avalsize, sizeof (valsize));
+	}
+	if (m != NULL)
+		(void) m_free(m);
+	return (error);
+}
+
+struct pipe_args {
+	int	dummy;
+};
+/* ARGSUSED */
+pipe(p, uap, retval)
+	struct proc *p;
+	struct pipe_args *uap;
+	int retval[];
+{
+	register struct filedesc *fdp = p->p_fd;
+	struct file *rf, *wf;
+	struct socket *rso, *wso;
+	int fd, error;
+
+	if (error = socreate(AF_UNIX, &rso, SOCK_STREAM, 0))
+		return (error);
+	if (error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0))
+		goto free1;
+	if (error = falloc(p, &rf, &fd))
+		goto free2;
+	retval[0] = fd;
+	rf->f_flag = FREAD;
+	rf->f_type = DTYPE_SOCKET;
+	rf->f_ops = &socketops;
+	rf->f_data = (caddr_t)rso;
+	if (error = falloc(p, &wf, &fd))
+		goto free3;
+	wf->f_flag = FWRITE;
+	wf->f_type = DTYPE_SOCKET;
+	wf->f_ops = &socketops;
+	wf->f_data = (caddr_t)wso;
+	retval[1] = fd;
+	if (error = unp_connect2(wso, rso))
+		goto free4;
+	return (0);
+free4:
+	ffree(wf);
+	fdp->fd_ofiles[retval[1]] = 0;
+free3:
+	ffree(rf);
+	fdp->fd_ofiles[retval[0]] = 0;
+free2:
+	(void)soclose(wso);
+free1:
+	(void)soclose(rso);
+	return (error);
+}
+
+/*
+ * Get socket name.
+ */
+struct getsockname_args {
+	int	fdes;
+	caddr_t	asa;
+	int	*alen;
+#ifdef COMPAT_OLDSOCK
+	int	compat_43;	/* pseudo */
+#endif
+};
+#ifdef COMPAT_OLDSOCK
+getsockname(p, uap, retval)
+	struct proc *p;
+	struct getsockname_args *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 0;
+	return (getsockname1(p, uap, retval));
+}
+
+ogetsockname(p, uap, retval)
+	struct proc *p;
+	struct getsockname_args *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 1;
+	return (getsockname1(p, uap, retval));
+}
+#else /* COMPAT_OLDSOCK */
+
+#define	getsockname1	getsockname
+#endif
+
+/* ARGSUSED */
+getsockname1(p, uap, retval)
+	struct proc *p;
+	register struct getsockname_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	register struct socket *so;
+	struct mbuf *m;
+	int len, error;
+
+	if (error = getsock(p->p_fd, uap->fdes, &fp))
+		return (error);
+	if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len)))
+		return (error);
+	so = (struct socket *)fp->f_data;
+	m = m_getclr(M_WAIT, MT_SONAME);
+	if (m == NULL)
+		return (ENOBUFS);
+	if (error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0))
+		goto bad;
+	if (len > m->m_len)
+		len = m->m_len;
+#ifdef COMPAT_OLDSOCK
+	if (uap->compat_43)
+		mtod(m, struct osockaddr *)->sa_family =
+		    mtod(m, struct sockaddr *)->sa_family;
+#endif
+	error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len);
+	if (error == 0)
+		error = copyout((caddr_t)&len, (caddr_t)uap->alen,
+		    sizeof (len));
+bad:
+	m_freem(m);
+	return (error);
+}
+
+/*
+ * Get name of peer for connected socket.
+ */
+struct getpeername_args {
+	int	fdes;
+	caddr_t	asa;
+	int	*alen;
+#ifdef COMPAT_OLDSOCK
+	int	compat_43;	/* pseudo */
+#endif
+};
+
+#ifdef COMPAT_OLDSOCK
+getpeername(p, uap, retval)
+	struct proc *p;
+	struct getpeername_args *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 0;
+	return (getpeername1(p, uap, retval));
+}
+
+ogetpeername(p, uap, retval)
+	struct proc *p;
+	struct getpeername_args *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 1;
+	return (getpeername1(p, uap, retval));
+}
+#else /* COMPAT_OLDSOCK */
+
+#define	getpeername1	getpeername
+#endif
+
+/* ARGSUSED */
+getpeername1(p, uap, retval)
+	struct proc *p;
+	register struct getpeername_args *uap;
+	int *retval;
+{
+	struct file *fp;
+	register struct socket *so;
+	struct mbuf *m;
+	int len, error;
+
+	if (error = getsock(p->p_fd, uap->fdes, &fp))
+		return (error);
+	so = (struct socket *)fp->f_data;
+	if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0)
+		return (ENOTCONN);
+	if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len)))
+		return (error);
+	m = m_getclr(M_WAIT, MT_SONAME);
+	if (m == NULL)
+		return (ENOBUFS);
+	if (error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0))
+		goto bad;
+	if (len > m->m_len)
+		len = m->m_len;
+#ifdef COMPAT_OLDSOCK
+	if (uap->compat_43)
+		mtod(m, struct osockaddr *)->sa_family =
+		    mtod(m, struct sockaddr *)->sa_family;
+#endif
+	if (error = copyout(mtod(m, caddr_t), (caddr_t)uap->asa, (u_int)len))
+		goto bad;
+	error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len));
+bad:
+	m_freem(m);
+	return (error);
+}
+
+sockargs(mp, buf, buflen, type)
+	struct mbuf **mp;
+	caddr_t buf;
+	int buflen, type;
+{
+	register struct sockaddr *sa;
+	register 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
+		return (EINVAL);
+	}
+	m = m_get(M_WAIT, type);
+	if (m == NULL)
+		return (ENOBUFS);
+	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);
+}
+
+getsock(fdp, fdes, fpp)
+	struct filedesc *fdp;
+	int fdes;
+	struct file **fpp;
+{
+	register struct file *fp;
+
+	if ((unsigned)fdes >= fdp->fd_nfiles ||
+	    (fp = fdp->fd_ofiles[fdes]) == NULL)
+		return (EBADF);
+	if (fp->f_type != DTYPE_SOCKET)
+		return (ENOTSOCK);
+	*fpp = fp;
+	return (0);
+}