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NetBSD/sys/kern/uipc_syscalls.c

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/* $NetBSD: uipc_syscalls.c,v 1.30 1998/04/25 17:35:19 matt Exp $ */
/*
* 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 8.6 (Berkeley) 2/14/95
*/
#include <sys/param.h>
#include <sys/systm.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>
#include <sys/signalvar.h>
#include <sys/un.h>
#ifdef KTRACE
#include <sys/ktrace.h>
#endif
#include <sys/mount.h>
#include <sys/syscallargs.h>
/*
* System call interface to the socket abstraction.
*/
extern struct fileops socketops;
int
sys_socket(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_socket_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
} */ *uap = v;
struct filedesc *fdp = p->p_fd;
struct socket *so;
struct file *fp;
int fd, error;
if ((error = falloc(p, &fp, &fd)) != 0)
return (error);
fp->f_flag = FREAD|FWRITE;
fp->f_type = DTYPE_SOCKET;
fp->f_ops = &socketops;
error = socreate(SCARG(uap, domain), &so, SCARG(uap, type),
SCARG(uap, protocol));
if (error) {
fdp->fd_ofiles[fd] = 0;
ffree(fp);
} else {
fp->f_data = (caddr_t)so;
*retval = fd;
}
return (error);
}
/* ARGSUSED */
int
sys_bind(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_bind_args /* {
syscallarg(int) s;
syscallarg(const struct sockaddr *) name;
syscallarg(int) namelen;
} */ *uap = v;
struct file *fp;
struct mbuf *nam;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen),
MT_SONAME);
if (error)
return (error);
error = sobind((struct socket *)fp->f_data, nam);
m_freem(nam);
return (error);
}
/* ARGSUSED */
int
sys_listen(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_listen_args /* {
syscallarg(int) s;
syscallarg(int) backlog;
} */ *uap = v;
struct file *fp;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
return (solisten((struct socket *)fp->f_data, SCARG(uap, backlog)));
}
int
sys_accept(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_accept_args /* {
syscallarg(int) s;
syscallarg(struct sockaddr *) name;
syscallarg(int *) anamelen;
} */ *uap = v;
struct file *fp;
struct mbuf *nam;
int namelen, error, s, tmpfd;
register struct socket *so;
if (SCARG(uap, name) && (error = copyin((caddr_t)SCARG(uap, anamelen),
(caddr_t)&namelen, sizeof (namelen))))
return (error);
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
s = splsoftnet();
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;
}
error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
netcon, 0);
if (error) {
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, &tmpfd)) != 0) {
splx(s);
return (error);
}
*retval = tmpfd;
{ struct socket *aso = so->so_q.tqh_first;
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 (SCARG(uap, name)) {
if (namelen > nam->m_len)
namelen = nam->m_len;
/* SHOULD COPY OUT A CHAIN HERE */
if ((error = copyout(mtod(nam, caddr_t),
(caddr_t)SCARG(uap, name), (u_int)namelen)) == 0)
error = copyout((caddr_t)&namelen,
(caddr_t)SCARG(uap, anamelen),
sizeof (*SCARG(uap, anamelen)));
}
m_freem(nam);
splx(s);
return (error);
}
/* ARGSUSED */
int
sys_connect(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_connect_args /* {
syscallarg(int) s;
syscallarg(const struct sockaddr *) name;
syscallarg(int) namelen;
} */ *uap = v;
struct file *fp;
register struct socket *so;
struct mbuf *nam;
int error, s;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
so = (struct socket *)fp->f_data;
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING))
return (EALREADY);
error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen),
MT_SONAME);
if (error)
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 = splsoftnet();
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
netcon, 0);
if (error)
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);
}
int
sys_socketpair(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_socketpair_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
syscallarg(int *) rsv;
} */ *uap = v;
register struct filedesc *fdp = p->p_fd;
struct file *fp1, *fp2;
struct socket *so1, *so2;
int fd, error, sv[2];
error = socreate(SCARG(uap, domain), &so1, SCARG(uap, type),
SCARG(uap, protocol));
if (error)
return (error);
error = socreate(SCARG(uap, domain), &so2, SCARG(uap, type),
SCARG(uap, protocol));
if (error)
goto free1;
if ((error = falloc(p, &fp1, &fd)) != 0)
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)) != 0)
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)) != 0)
goto free4;
if (SCARG(uap, type) == SOCK_DGRAM) {
/*
* Datagram socket connection is asymmetric.
*/
if ((error = soconnect2(so2, so1)) != 0)
goto free4;
}
error = copyout((caddr_t)sv, (caddr_t)SCARG(uap, rsv),
2 * sizeof (int));
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);
}
int
sys_sendto(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_sendto_args /* {
syscallarg(int) s;
syscallarg(const void *) buf;
syscallarg(size_t) len;
syscallarg(int) flags;
syscallarg(const struct sockaddr *) to;
syscallarg(int) tolen;
} */ *uap = v;
struct msghdr msg;
struct iovec aiov;
msg.msg_name = (caddr_t)SCARG(uap, to); /* XXX kills const */
msg.msg_namelen = SCARG(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 = (char *)SCARG(uap, buf); /* XXX kills const */
aiov.iov_len = SCARG(uap, len);
return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval));
}
int
sys_sendmsg(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_sendmsg_args /* {
syscallarg(int) s;
syscallarg(const struct msghdr *) msg;
syscallarg(int) flags;
} */ *uap = v;
struct msghdr msg;
struct iovec aiov[UIO_SMALLIOV], *iov;
int error;
error = copyin(SCARG(uap, msg), (caddr_t)&msg, sizeof (msg));
if (error)
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, SCARG(uap, s), &msg, SCARG(uap, flags), retval);
done:
if (iov != aiov)
FREE(iov, M_IOV);
return (error);
}
int
sendit(p, s, mp, flags, retsize)
register struct proc *p;
int s;
register struct msghdr *mp;
int flags;
register_t *retsize;
{
struct file *fp;
struct uio auio;
register struct iovec *iov;
register int i;
struct mbuf *to, *control;
int len, error;
struct socket *so;
#ifdef KTRACE
struct iovec *ktriov = NULL;
#endif
if ((error = getsock(p->p_fd, s, &fp)) != 0)
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 0
/* cannot happen; iov_len is unsigned */
if (iov->iov_len < 0)
return (EINVAL);
#endif
if ((auio.uio_resid += iov->iov_len) < 0)
return (EINVAL);
}
if (mp->msg_name) {
error = sockargs(&to, mp->msg_name, mp->msg_namelen,
MT_SONAME);
if (error)
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;
}
error = sockargs(&control, mp->msg_control,
mp->msg_controllen, MT_CONTROL);
if (error)
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;
so = (struct socket *)fp->f_data;
error = (*so->so_send)(so, to, &auio, NULL, control, flags);
if (error) {
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);
}
int
sys_recvfrom(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_recvfrom_args /* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(size_t) len;
syscallarg(int) flags;
syscallarg(struct sockaddr *) from;
syscallarg(int *) fromlenaddr;
} */ *uap = v;
struct msghdr msg;
struct iovec aiov;
int error;
if (SCARG(uap, fromlenaddr)) {
error = copyin((caddr_t)SCARG(uap, fromlenaddr),
(caddr_t)&msg.msg_namelen,
sizeof (msg.msg_namelen));
if (error)
return (error);
} else
msg.msg_namelen = 0;
msg.msg_name = (caddr_t)SCARG(uap, from);
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
aiov.iov_base = SCARG(uap, buf);
aiov.iov_len = SCARG(uap, len);
msg.msg_control = 0;
msg.msg_flags = SCARG(uap, flags);
return (recvit(p, SCARG(uap, s), &msg,
(caddr_t)SCARG(uap, fromlenaddr), retval));
}
int
sys_recvmsg(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_recvmsg_args /* {
syscallarg(int) s;
syscallarg(struct msghdr *) msg;
syscallarg(int) flags;
} */ *uap = v;
struct msghdr msg;
struct iovec aiov[UIO_SMALLIOV], *uiov, *iov;
register int error;
error = copyin((caddr_t)SCARG(uap, msg), (caddr_t)&msg,
sizeof (msg));
if (error)
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 = SCARG(uap, flags) &~ MSG_COMPAT;
#else
msg.msg_flags = SCARG(uap, flags);
#endif
uiov = msg.msg_iov;
msg.msg_iov = iov;
error = copyin((caddr_t)uiov, (caddr_t)iov,
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
if (error)
goto done;
if ((error = recvit(p, SCARG(uap, s), &msg, (caddr_t)0, retval)) == 0) {
msg.msg_iov = uiov;
error = copyout((caddr_t)&msg, (caddr_t)SCARG(uap, msg),
sizeof(msg));
}
done:
if (iov != aiov)
FREE(iov, M_IOV);
return (error);
}
int
recvit(p, s, mp, namelenp, retsize)
register struct proc *p;
int s;
register struct msghdr *mp;
caddr_t namelenp;
register_t *retsize;
{
struct file *fp;
struct uio auio;
register struct iovec *iov;
register int i;
int len, error;
struct mbuf *from = 0, *control = 0;
struct socket *so;
#ifdef KTRACE
struct iovec *ktriov = NULL;
#endif
if ((error = getsock(p->p_fd, s, &fp)) != 0)
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 0
/* cannot happen iov_len is unsigned */
if (iov->iov_len < 0)
return (EINVAL);
#endif
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;
so = (struct socket *)fp->f_data;
error = (*so->so_receive)(so, &from, &auio, NULL,
mp->msg_control ? &control : NULL, &mp->msg_flags);
if (error) {
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 ??? */
error = copyout(mtod(from, caddr_t),
(caddr_t)mp->msg_name, (unsigned)len);
if (error)
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 {
struct mbuf *m = control;
caddr_t p = (caddr_t)mp->msg_control;
do {
i = m->m_len;
if (len < i) {
mp->msg_flags |= MSG_CTRUNC;
i = len;
}
error = copyout(mtod(m, caddr_t), p,
(unsigned)i);
if (m->m_next)
i = ALIGN(i);
p += i;
len -= i;
if (error != 0 || len <= 0)
break;
} while ((m = m->m_next) != NULL);
len = p - (caddr_t)mp->msg_control;
}
mp->msg_controllen = len;
}
out:
if (from)
m_freem(from);
if (control)
m_freem(control);
return (error);
}
/* ARGSUSED */
int
sys_shutdown(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_shutdown_args /* {
syscallarg(int) s;
syscallarg(int) how;
} */ *uap = v;
struct file *fp;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
return (soshutdown((struct socket *)fp->f_data, SCARG(uap, how)));
}
/* ARGSUSED */
int
sys_setsockopt(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_setsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) name;
syscallarg(const void *) val;
syscallarg(int) valsize;
} */ *uap = v;
struct file *fp;
struct mbuf *m = NULL;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
if (SCARG(uap, valsize) > MLEN)
return (EINVAL);
if (SCARG(uap, val)) {
m = m_get(M_WAIT, MT_SOOPTS);
error = copyin(SCARG(uap, val), mtod(m, caddr_t),
(u_int)SCARG(uap, valsize));
if (error) {
(void) m_free(m);
return (error);
}
m->m_len = SCARG(uap, valsize);
}
return (sosetopt((struct socket *)fp->f_data, SCARG(uap, level),
SCARG(uap, name), m));
}
/* ARGSUSED */
int
sys_getsockopt(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_getsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) name;
syscallarg(void *) val;
syscallarg(int *) avalsize;
} */ *uap = v;
struct file *fp;
struct mbuf *m = NULL;
int valsize, error;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
if (SCARG(uap, val)) {
error = copyin((caddr_t)SCARG(uap, avalsize),
(caddr_t)&valsize, sizeof (valsize));
if (error)
return (error);
} else
valsize = 0;
if ((error = sogetopt((struct socket *)fp->f_data, SCARG(uap, level),
SCARG(uap, name), &m)) == 0 && SCARG(uap, val) && valsize &&
m != NULL) {
if (valsize > m->m_len)
valsize = m->m_len;
error = copyout(mtod(m, caddr_t), SCARG(uap, val),
(u_int)valsize);
if (error == 0)
error = copyout((caddr_t)&valsize,
(caddr_t)SCARG(uap, avalsize), sizeof (valsize));
}
if (m != NULL)
(void) m_free(m);
return (error);
}
/* ARGSUSED */
int
sys_pipe(p, v, retval)
struct proc *p;
void *v;
register_t *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)) != 0)
return (error);
if ((error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0)) != 0)
goto free1;
if ((error = falloc(p, &rf, &fd)) != 0)
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)) != 0)
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)) != 0)
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.
*/
/* ARGSUSED */
int
sys_getsockname(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_getsockname_args /* {
syscallarg(int) fdes;
syscallarg(struct sockaddr *) asa;
syscallarg(int *) alen;
} */ *uap = v;
struct file *fp;
register struct socket *so;
struct mbuf *m;
int len, error;
if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0)
return (error);
error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len));
if (error)
return (error);
so = (struct socket *)fp->f_data;
m = m_getclr(M_WAIT, MT_SONAME);
error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, (struct mbuf *)0,
m, (struct mbuf *)0, (struct proc *)0);
if (error)
goto bad;
if (len > m->m_len)
len = m->m_len;
error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len);
if (error == 0)
error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen),
sizeof (len));
bad:
m_freem(m);
return (error);
}
/*
* Get name of peer for connected socket.
*/
/* ARGSUSED */
int
sys_getpeername(p, v, retval)
struct proc *p;
void *v;
register_t *retval;
{
register struct sys_getpeername_args /* {
syscallarg(int) fdes;
syscallarg(struct sockaddr *) asa;
syscallarg(int *) alen;
} */ *uap = v;
struct file *fp;
register struct socket *so;
struct mbuf *m;
int len, error;
if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0)
return (error);
so = (struct socket *)fp->f_data;
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0)
return (ENOTCONN);
error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof (len));
if (error)
return (error);
m = m_getclr(M_WAIT, MT_SONAME);
error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, (struct mbuf *)0,
m, (struct mbuf *)0, (struct proc *)0);
if (error)
goto bad;
if (len > m->m_len)
len = m->m_len;
error = copyout(mtod(m, caddr_t), (caddr_t)SCARG(uap, asa), (u_int)len);
if (error)
goto bad;
error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof (len));
bad:
m_freem(m);
return (error);
}
/*
* XXX In a perfect world, we wouldn't pass around socket control
* XXX arguments in mbufs, and this could go away.
*/
int
sockargs(mp, buf, buflen, type)
struct mbuf **mp;
const void *buf;
int buflen, type;
{
register struct sockaddr *sa;
register struct mbuf *m;
int error;
/*
* We can't allow socket names > UCHAR_MAX in length, since that
* will overflow sa_len.
*/
if (type == MT_SONAME && (u_int)buflen > UCHAR_MAX)
return (EINVAL);
/* Allocate an mbuf to hold the arguments. */
m = m_get(M_WAIT, type);
if ((u_int)buflen > MLEN) {
/*
* Won't fit into a regular mbuf, so we allocate just
* enough external storage to hold the argument.
*/
MEXTMALLOC(m, buflen, M_WAITOK);
}
m->m_len = buflen;
error = copyin(buf, mtod(m, caddr_t), (u_int)buflen);
if (error) {
(void) m_free(m);
return (error);
}
*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 (0);
}
int
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);
}
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