X-Git-Url: https://git.subgeniuskitty.com/unix-history/.git/blobdiff_plain/4a2ddbf18dd19f34cdd8770365cc6ac08d10c423..8e6cd80742edef90616619006ea229b59b75bf57:/usr/src/sys/kern/uipc_syscalls.c

diff --git a/usr/src/sys/kern/uipc_syscalls.c b/usr/src/sys/kern/uipc_syscalls.c
index 7c0de7842a..a704ef70f4 100644
--- a/usr/src/sys/kern/uipc_syscalls.c
+++ b/usr/src/sys/kern/uipc_syscalls.c
@@ -1,311 +1,1199 @@
-/*	uipc_syscalls.c	4.20	82/06/20	*/
-
-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/proc.h"
-#include "../h/file.h"
-#include "../h/inode.h"
-#include "../h/buf.h"
-#include "../h/mbuf.h"
-#include "../h/protosw.h"
-#include "../h/socket.h"
-#include "../h/socketvar.h"
-#include "../net/in.h"
-#include "../net/in_systm.h"
-
 /*
- * Socket system call interface.
  *
- * These routines interface the socket routines to UNIX,
- * isolating the system interface from the socket-protocol interface.
+ * %sccs.include.redist.c%
  *
- * TODO:
- *	SO_INTNOTIFY
+ *	@(#)uipc_syscalls.c	7.23 (Berkeley) %G%
  */
 
-static	struct sockproto localproto = { PF_UNIX, 0 };
-/*
- * Pipe system call interface.
- */
-spipe()
-{
-	register struct file *rf, *wf;
-	struct socket *rso, *wso;
-	int r;
-	
-	u.u_error = socreate(&rso, SOCK_STREAM,
-	    &localproto, (struct sockaddr *)0, 0);
-	if (u.u_error)
-		return;
-	u.u_error = socreate(&wso, SOCK_STREAM,
-	    &localproto, (struct sockaddr *)0, 0);
-	if (u.u_error)
-		goto free;
-	rf = falloc();
-	if (rf == NULL)
-		goto free2;
-	r = u.u_r.r_val1;
-	rf->f_flag = FREAD|FSOCKET;
-	rf->f_socket = rso;
-	wf = falloc();
-	if (wf == NULL)
-		goto free3;
-	wf->f_flag = FWRITE|FSOCKET;
-	wf->f_socket = wso;
-	u.u_r.r_val2 = u.u_r.r_val1;
-	u.u_r.r_val1 = r;
-	if (piconnect(wso, rso) == 0)
-		goto free4;
-	return;
-free4:
-	wf->f_count = 0;
-	u.u_ofile[u.u_r.r_val2] = 0;
-free3:
-	rf->f_count = 0;
-	u.u_ofile[r] = 0;
-free2:
-	wso->so_state |= SS_USERGONE;
-	sofree(wso);
-free:
-	rso->so_state |= SS_USERGONE;
-	sofree(rso);
-}
+#include "param.h"
+#include "filedesc.h"
+#include "proc.h"
+#include "file.h"
+#include "buf.h"
+#include "malloc.h"
+#include "mbuf.h"
+#include "protosw.h"
+#include "socket.h"
+#include "socketvar.h"
+#ifdef KTRACE
+#include "ktrace.h"
+#endif
 
 /*
- * Socket system call interface.  Copy sa arguments
- * set up file descriptor and call internal socket
- * creation routine.
+ * System call interface to the socket abstraction.
  */
-ssocket()
-{
-	register struct a {
+
+extern	struct fileops socketops;
+
+socket(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	domain;
 		int	type;
-		struct	sockproto *asp;
-		struct	sockaddr *asa;
-		int	options;
-	} *uap = (struct a *)u.u_ap;
-	struct sockproto sp;
-	struct sockaddr sa;
+		int	protocol;
+	} *uap;
+	int *retval;
+{
+	struct filedesc *fdp = p->p_fd;
 	struct socket *so;
-	register struct file *fp;
+	struct file *fp;
+	int fd, error;
 
-	if ((fp = falloc()) == NULL)
-		return;
-	fp->f_flag = FSOCKET|FREAD|FWRITE;
-	if (uap->asp && copyin((caddr_t)uap->asp, (caddr_t)&sp, sizeof (sp)) ||
-	    uap->asa && copyin((caddr_t)uap->asa, (caddr_t)&sa, sizeof (sa))) {
-		u.u_error = EFAULT;
-		return;
+	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;
+		crfree(fp->f_cred);
+		fp->f_count = 0;
+	} else {
+		fp->f_data = (caddr_t)so;
+		*retval = fd;
 	}
-	u.u_error = socreate(&so, uap->type,
-	    uap->asp ? &sp : 0, uap->asa ? &sa : 0, uap->options);
-	if (u.u_error)
-		goto bad;
-	fp->f_socket = so;
-	return;
-bad:
-	u.u_ofile[u.u_r.r_val1] = 0;
-	fp->f_count = 0;
+	return (error);
 }
 
-/*
- * Accept system call interface.
- */
-saccept()
+/* ARGSUSED */
+bind(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	name;
+		int	namelen;
+	} *uap;
+	int *retval;
 {
-	register struct a {
-		int	fdes;
-		struct	sockaddr *asa;
-	} *uap = (struct a *)u.u_ap;
-	struct sockaddr sa;
-	register struct file *fp;
-	struct socket *so;
-	int s;
+	struct file *fp;
+	struct mbuf *nam;
+	int error;
 
-	if (uap->asa && useracc((caddr_t)uap->asa, sizeof (sa), B_WRITE)==0) {
-		u.u_error = EFAULT;
-		return;
-	}
-	fp = getf(uap->fdes);
-	if (fp == 0)
-		return;
-	if ((fp->f_flag & FSOCKET) == 0) {
-		u.u_error = ENOTSOCK;
-		return;
-	}
+	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);
+}
+
+/* ARGSUSED */
+listen(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		int	backlog;
+	} *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));
+}
+
+#ifdef COMPAT_43
+accept(p, uap, retval)
+	struct proc *p;
+	struct args {
+		int	s;
+		caddr_t	name;
+		int	*anamelen;
+		int	compat_43;
+	} *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 0;
+	return (accept1(p, uap, retval));
+}
+
+oaccept(p, uap, retval)
+	struct proc *p;
+	struct args {
+		int	s;
+		caddr_t	name;
+		int	*anamelen;
+		int	compat_43;
+	} *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 1;
+	return (accept1(p, uap, retval));
+}
+#else /* COMPAT_43 */
+
+#define	accept1	accept
+#endif
+
+accept1(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	name;
+		int	*anamelen;
+#ifdef COMPAT_43
+		int	compat_43;
+#endif
+	} *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 = fp->f_socket;
-	if ((so->so_state & SS_NBIO) &&
-	    (so->so_state & SS_CONNAWAITING) == 0) {
-		u.u_error = EWOULDBLOCK;
+	so = (struct socket *)fp->f_data;
+	if ((so->so_options & SO_ACCEPTCONN) == 0) {
 		splx(s);
-		return;
+		return (EINVAL);
 	}
-	while ((so->so_state & SS_CONNAWAITING) == 0 && so->so_error == 0) {
+	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;
 		}
-		sleep((caddr_t)&so->so_timeo, PZERO+1);
+		if (error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
+		    netcon, 0)) {
+			splx(s);
+			return (error);
+		}
 	}
 	if (so->so_error) {
-		u.u_error = so->so_error;
+		error = so->so_error;
+		so->so_error = 0;
 		splx(s);
-		return;
+		return (error);
 	}
-	u.u_error = soaccept(so, &sa);
-	if (u.u_error) {
+	if (error = falloc(p, &fp, retval)) {
 		splx(s);
-		return;
+		return (error);
 	}
-	if (uap->asa)
-		(void) copyout((caddr_t)&sa, (caddr_t)uap->asa, sizeof (sa));
-	/* deal with new file descriptor case */
-	/* u.u_r.r_val1 = ... */
+	{ 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_43
+		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);
 }
 
-/*
- * Connect socket to foreign peer; system call
- * interface.  Copy sa arguments and call internal routine.
- */
-sconnect()
+/* ARGSUSED */
+connect(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	name;
+		int	namelen;
+	} *uap;
+	int *retval;
 {
-	register struct a {
-		int	fdes;
-		struct	sockaddr *a;
-	} *uap = (struct a *)u.u_ap;
-	struct sockaddr sa;
-	register struct file *fp;
+	struct file *fp;
 	register struct socket *so;
-	int s;
+	struct mbuf *nam;
+	int error, s;
 
-	if (copyin((caddr_t)uap->a, (caddr_t)&sa, sizeof (sa))) {
-		u.u_error = EFAULT;
-		return;
-	}
-	fp = getf(uap->fdes);
-	if (fp == 0)
-		return;
-	if ((fp->f_flag & FSOCKET) == 0) {
-		u.u_error = ENOTSOCK;
-		return;
+	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);
 	}
-	so = fp->f_socket;
-	u.u_error = soconnect(so, &sa);
-	if (u.u_error)
-		return;
 	s = splnet();
-	if ((so->so_state & SS_NBIO) &&
-	    (so->so_state & SS_ISCONNECTING)) {
-		u.u_error = EINPROGRESS;
-		splx(s);
-		return;
-	}
 	while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0)
-		sleep((caddr_t)&so->so_timeo, PZERO+1);
-	u.u_error = so->so_error;
-	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);
+}
+
+socketpair(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	domain;
+		int	type;
+		int	protocol;
+		int	*rsv;
+	} *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:
+	crfree(fp2->f_cred);
+	fp2->f_count = 0;
+	fdp->fd_ofiles[sv[1]] = 0;
+free3:
+	crfree(fp1->f_cred);
+	fp1->f_count = 0;
+	fdp->fd_ofiles[sv[0]] = 0;
+free2:
+	(void)soclose(so2);
+free1:
+	(void)soclose(so1);
+	return (error);
+}
+
+sendto(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+		caddr_t	to;
+		int	tolen;
+	} *uap;
+	int *retval;
+{
+	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_43
+	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_43
+osend(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+	} *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
+osendmsg(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	msg;
+		int	flags;
+	} *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
+
+sendmsg(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	msg;
+		int	flags;
+	} *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_43
+	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_43
+		    && 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_43
+		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);
+}
+
+#ifdef COMPAT_43
+orecvfrom(p, uap, retval)
+	struct proc *p;
+	struct args {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+		caddr_t	from;
+		int	*fromlenaddr;
+	} *uap;
+	int *retval;
+{
+
+	uap->flags |= MSG_COMPAT;
+	return (recvfrom(p, uap, retval));
+}
+#endif
+
+recvfrom(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+		caddr_t	from;
+		int	*fromlenaddr;
+	} *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_43
+orecv(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		caddr_t	buf;
+		int	len;
+		int	flags;
+	} *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));
 }
 
 /*
- * Send data on socket.
+ * 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.
  */
-ssend()
+orecvmsg(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		struct	omsghdr *msg;
+		int	flags;
+	} *uap;
+	int *retval;
 {
-	register struct a {
-		int	fdes;
-		struct	sockaddr *asa;
-		caddr_t	cbuf;
-		unsigned count;
-	} *uap = (struct a *)u.u_ap;
-	register struct file *fp;
-	struct sockaddr sa;
-
-	fp = getf(uap->fdes);
-	if (fp == 0)
-		return;
-	if ((fp->f_flag & FSOCKET) == 0) {
-		u.u_error = ENOTSOCK;
-		return;
+	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
+
+recvmsg(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		struct	msghdr *msg;
+		int	flags;
+	} *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_43
+	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);
 	}
-	u.u_base = uap->cbuf;
-	u.u_count = uap->count;
-	u.u_segflg = 0;
-	if (useracc(uap->cbuf, uap->count, B_READ) == 0 ||
-	    uap->asa && copyin((caddr_t)uap->asa, (caddr_t)&sa, sizeof (sa))) {
-		u.u_error = EFAULT;
-		return;
+#endif
+	len = auio.uio_resid;
+	if (error = soreceive((struct socket *)fp->f_data, &from, &auio,
+	    (struct mbuf **)0, &control, &mp->msg_flags)) {
+		if (auio.uio_resid != len && (error == ERESTART ||
+		    error == EINTR || error == EWOULDBLOCK))
+			error = 0;
 	}
-	u.u_error = sosend(fp->f_socket, uap->asa ? &sa : 0);
-	u.u_r.r_val1 = uap->count - u.u_count;
+#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_43
+			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_43
+			if (mp->msg_flags & MSG_COMPAT)
+				error = 0;	/* old recvfrom didn't check */
+			else
+#endif
+			goto out;
+		}
+	}
+	if (mp->msg_control) {
+#ifdef	COMPAT_43
+		/*
+		 * 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);
+}
+
+/* ARGSUSED */
+shutdown(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		int	how;
+	} *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));
+}
+
+/* ARGSUSED */
+setsockopt(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		int	level;
+		int	name;
+		caddr_t	val;
+		int	valsize;
+	} *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));
+}
+
+/* ARGSUSED */
+getsockopt(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	s;
+		int	level;
+		int	name;
+		caddr_t	val;
+		int	*avalsize;
+	} *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);
+}
+
+/* ARGSUSED */
+pipe(p, uap, retval)
+	struct proc *p;
+	struct 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:
+	wf->f_count = 0;
+	fdp->fd_ofiles[retval[1]] = 0;
+free3:
+	rf->f_count = 0;
+	fdp->fd_ofiles[retval[0]] = 0;
+free2:
+	(void)soclose(wso);
+free1:
+	(void)soclose(rso);
+	return (error);
 }
 
 /*
- * Receive data on socket.
+ * Get socket name.
  */
-sreceive()
+#ifdef COMPAT_43
+getsockname(p, uap, retval)
+	struct proc *p;
+	struct args {
+		int	fdes;
+		caddr_t	asa;
+		int	*alen;
+		int	compat_43;
+	} *uap;
+	int *retval;
 {
-	register struct a {
+
+	uap->compat_43 = 0;
+	return (getsockname1(p, uap, retval));
+}
+
+ogetsockname(p, uap, retval)
+	struct proc *p;
+	struct args {
 		int	fdes;
-		struct	sockaddr *asa;
-		caddr_t	cbuf;
-		u_int	count;
-	} *uap = (struct a *)u.u_ap;
-	register struct file *fp;
-	struct sockaddr sa;
-
-	fp = getf(uap->fdes);
-	if (fp == 0)
-		return;
-	if ((fp->f_flag & FSOCKET) == 0) {
-		u.u_error = ENOTSOCK;
-		return;
-	}
-	u.u_base = uap->cbuf;
-	u.u_count = uap->count;
-	u.u_segflg = 0;
-	if (useracc(uap->cbuf, uap->count, B_WRITE) == 0 ||
-	    uap->asa && copyin((caddr_t)uap->asa, (caddr_t)&sa, sizeof (sa))) {
-		u.u_error = EFAULT;
-		return;
-	}
-	u.u_error = soreceive(fp->f_socket, uap->asa ? &sa : 0);
-	if (u.u_error)
-		return;
-	if (uap->asa)
-		(void) copyout((caddr_t)&sa, (caddr_t)uap->asa, sizeof (sa));
-	u.u_r.r_val1 = uap->count - u.u_count;
+		caddr_t	asa;
+		int	*alen;
+		int	compat_43;
+	} *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 1;
+	return (getsockname1(p, uap, retval));
+}
+#else /* COMPAT_43 */
+
+#define	getsockname1	getsockname
+#endif
+
+/* ARGSUSED */
+getsockname1(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	fdes;
+		caddr_t	asa;
+		int	*alen;
+#ifdef COMPAT_43
+		int	compat_43;
+#endif
+	} *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_43
+	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 socket address.
+ * Get name of peer for connected socket.
  */
-ssocketaddr()
+#ifdef COMPAT_43
+getpeername(p, uap, retval)
+	struct proc *p;
+	struct args {
+		int	fdes;
+		caddr_t	asa;
+		int	*alen;
+		int	compat_43;
+	} *uap;
+	int *retval;
 {
-	register struct a {
+
+	uap->compat_43 = 0;
+	return (getpeername1(p, uap, retval));
+}
+
+ogetpeername(p, uap, retval)
+	struct proc *p;
+	struct args {
 		int	fdes;
-		struct	sockaddr *asa;
-	} *uap = (struct a *)u.u_ap;
-	register struct file *fp;
+		caddr_t	asa;
+		int	*alen;
+		int	compat_43;
+	} *uap;
+	int *retval;
+{
+
+	uap->compat_43 = 1;
+	return (getpeername1(p, uap, retval));
+}
+#else /* COMPAT_43 */
+
+#define	getpeername1	getpeername
+#endif
+
+/* ARGSUSED */
+getpeername1(p, uap, retval)
+	struct proc *p;
+	register struct args {
+		int	fdes;
+		caddr_t	asa;
+		int	*alen;
+#ifdef COMPAT_43
+		int	compat_43;
+#endif
+	} *uap;
+	int *retval;
+{
+	struct file *fp;
 	register struct socket *so;
-	struct sockaddr addr;
-
-	fp = getf(uap->fdes);
-	if (fp == 0)
-		return;
-	if ((fp->f_flag & FSOCKET) == 0) {
-		u.u_error = ENOTSOCK;
-		return;
+	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);
+	m = m_getclr(M_WAIT, MT_SONAME);
+	if (m == NULL)
+		return (ENOBUFS);
+	if (error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len)))
+		return (error);
+	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_43
+	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 mbuf *m;
+	int error;
+
+	if ((u_int)buflen > MLEN) {
+#ifdef COMPAT_43
+		if (type == MT_SONAME && (u_int)buflen <= 112)
+			buflen = MLEN;		/* unix domain compat. hack */
+		else
+#endif
+		return (EINVAL);
 	}
-	so = fp->f_socket;
-	u.u_error =
-		(*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, (caddr_t)&addr);
-	if (u.u_error)
-		return;
-	if (copyout((caddr_t)&addr, (caddr_t)uap->asa, sizeof (addr)))
-		u.u_error = EFAULT;
+	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) {
+		register struct sockaddr *sa = mtod(m, struct sockaddr *);
+
+#if defined(COMPAT_43) && 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);
 }