/* $OpenBSD: uipc_syscalls.c,v 1.66 2006/10/23 07:13:56 henning Exp $ */
/* $NetBSD: uipc_syscalls.c,v 1.19 1996/02/09 19:00:48 christos 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. 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/systm.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/event.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/signalvar.h>
#include <sys/unpcb.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(struct proc *p, void *v, register_t *retval)
{
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;
fdplock(fdp);
if ((error = falloc(p, &fp, &fd)) != 0)
goto out;
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) {
fdremove(fdp, fd);
closef(fp, p);
} else {
fp->f_data = so;
FILE_SET_MATURE(fp);
*retval = fd;
}
out:
fdpunlock(fdp);
return (error);
}
/* ARGSUSED */
int
sys_bind(struct proc *p, void *v, register_t *retval)
{
struct sys_bind_args /* {
syscallarg(int) s;
syscallarg(const struct sockaddr *) name;
syscallarg(socklen_t) 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 == 0) {
error = sobind(fp->f_data, nam);
m_freem(nam);
}
FRELE(fp);
return (error);
}
/* ARGSUSED */
int
sys_listen(struct proc *p, void *v, register_t *retval)
{
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);
error = solisten(fp->f_data, SCARG(uap, backlog));
FRELE(fp);
return (error);
}
int
sys_accept(struct proc *p, void *v, register_t *retval)
{
struct sys_accept_args /* {
syscallarg(int) s;
syscallarg(struct sockaddr *) name;
syscallarg(socklen_t *) anamelen;
} */ *uap = v;
struct file *fp, *headfp;
struct mbuf *nam;
socklen_t namelen;
int error, s, tmpfd;
struct socket *head, *so;
int nflag;
if (SCARG(uap, name) && (error = copyin(SCARG(uap, anamelen),
&namelen, sizeof (namelen))))
return (error);
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
headfp = fp;
s = splsoftnet();
head = fp->f_data;
if ((head->so_options & SO_ACCEPTCONN) == 0) {
error = EINVAL;
goto bad;
}
if ((head->so_state & SS_NBIO) && head->so_qlen == 0) {
if (head->so_state & SS_CANTRCVMORE)
error = ECONNABORTED;
else
error = EWOULDBLOCK;
goto bad;
}
while (head->so_qlen == 0 && head->so_error == 0) {
if (head->so_state & SS_CANTRCVMORE) {
head->so_error = ECONNABORTED;
break;
}
error = tsleep(&head->so_timeo, PSOCK | PCATCH, netcon, 0);
if (error) {
goto bad;
}
}
if (head->so_error) {
error = head->so_error;
head->so_error = 0;
goto bad;
}
/*
* At this point we know that there is at least one connection
* ready to be accepted. Remove it from the queue prior to
* allocating the file descriptor for it since falloc() may
* block allowing another process to accept the connection
* instead.
*/
so = TAILQ_FIRST(&head->so_q);
if (soqremque(so, 1) == 0)
panic("accept");
/* Take note if socket was non-blocking. */
nflag = (fp->f_flag & FNONBLOCK);
fdplock(p->p_fd);
if ((error = falloc(p, &fp, &tmpfd)) != 0) {
/*
* Probably ran out of file descriptors. Put the
* unaccepted connection back onto the queue and
* do another wakeup so some other process might
* have a chance at it.
*/
so->so_head = head;
head->so_qlen++;
so->so_onq = &head->so_q;
TAILQ_INSERT_HEAD(so->so_onq, so, so_qe);
wakeup_one(&head->so_timeo);
goto bad;
}
*retval = tmpfd;
/* connection has been removed from the listen queue */
KNOTE(&head->so_rcv.sb_sel.si_note, 0);
fp->f_type = DTYPE_SOCKET;
fp->f_flag = FREAD | FWRITE | nflag;
fp->f_ops = &socketops;
fp->f_data = so;
nam = m_get(M_WAIT, MT_SONAME);
error = soaccept(so, nam);
if (!error && 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),
SCARG(uap, name), namelen)) == 0)
error = copyout(&namelen, SCARG(uap, anamelen),
sizeof (*SCARG(uap, anamelen)));
}
/* if an error occurred, free the file descriptor */
if (error) {
fdremove(p->p_fd, tmpfd);
closef(fp, p);
} else {
FILE_SET_MATURE(fp);
}
m_freem(nam);
bad:
fdpunlock(p->p_fd);
splx(s);
FRELE(headfp);
return (error);
}
/* ARGSUSED */
int
sys_connect(struct proc *p, void *v, register_t *retval)
{
struct sys_connect_args /* {
syscallarg(int) s;
syscallarg(const struct sockaddr *) name;
syscallarg(socklen_t) namelen;
} */ *uap = v;
struct file *fp;
struct socket *so;
struct mbuf *nam = NULL;
int error, s;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
so = fp->f_data;
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
FRELE(fp);
return (EALREADY);
}
error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen),
MT_SONAME);
if (error)
goto bad;
error = soconnect(so, nam);
if (error)
goto bad;
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
FRELE(fp);
m_freem(nam);
return (EINPROGRESS);
}
s = splsoftnet();
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
error = tsleep(&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;
FRELE(fp);
if (nam)
m_freem(nam);
if (error == ERESTART)
error = EINTR;
return (error);
}
int
sys_socketpair(struct proc *p, void *v, register_t *retval)
{
struct sys_socketpair_args /* {
syscallarg(int) domain;
syscallarg(int) type;
syscallarg(int) protocol;
syscallarg(int *) rsv;
} */ *uap = v;
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;
fdplock(fdp);
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 = 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 = 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(sv, SCARG(uap, rsv), 2 * sizeof (int));
if (error == 0) {
FILE_SET_MATURE(fp1);
FILE_SET_MATURE(fp2);
fdpunlock(fdp);
return (0);
}
free4:
fdremove(fdp, sv[1]);
closef(fp2, p);
so2 = NULL;
free3:
fdremove(fdp, sv[0]);
closef(fp1, p);
so1 = NULL;
free2:
if (so2 != NULL)
(void)soclose(so2);
fdpunlock(fdp);
free1:
if (so1 != NULL)
(void)soclose(so1);
return (error);
}
int
sys_sendto(struct proc *p, void *v, register_t *retval)
{
struct sys_sendto_args /* {
syscallarg(int) s;
syscallarg(const void *) buf;
syscallarg(size_t) len;
syscallarg(int) flags;
syscallarg(const struct sockaddr *) to;
syscallarg(socklen_t) tolen;
} */ *uap = v;
struct msghdr msg;
struct iovec aiov;
msg.msg_name = (caddr_t)SCARG(uap, to);
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);
aiov.iov_len = SCARG(uap, len);
return (sendit(p, SCARG(uap, s), &msg, SCARG(uap, flags), retval));
}
int
sys_sendmsg(struct proc *p, void *v, register_t *retval)
{
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), &msg, sizeof (msg));
if (error)
return (error);
if (msg.msg_iovlen > IOV_MAX)
return (EMSGSIZE);
if (msg.msg_iovlen > UIO_SMALLIOV)
iov = malloc(sizeof(struct iovec) * msg.msg_iovlen,
M_IOV, M_WAITOK);
else
iov = aiov;
if (msg.msg_iovlen &&
(error = copyin(msg.msg_iov, 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(struct proc *p, int s, struct msghdr *mp, int flags, register_t *retsize)
{
struct file *fp;
struct uio auio;
struct iovec *iov;
int i;
struct mbuf *to, *control;
int len, error;
#ifdef KTRACE
struct iovec *ktriov = NULL;
#endif
to = NULL;
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++) {
/* Don't allow sum > SSIZE_MAX */
if (iov->iov_len > SSIZE_MAX ||
(auio.uio_resid += iov->iov_len) > SSIZE_MAX) {
error = EINVAL;
goto bad;
}
}
if (mp->msg_name) {
error = sockargs(&to, mp->msg_name, mp->msg_namelen,
MT_SONAME);
if (error)
goto bad;
}
if (mp->msg_control) {
if (mp->msg_controllen < CMSG_ALIGN(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 = 0;
#ifdef KTRACE
if (KTRPOINT(p, KTR_GENIO)) {
int iovlen = auio.uio_iovcnt * sizeof (struct iovec);
ktriov = malloc(iovlen, M_TEMP, M_WAITOK);
bcopy(auio.uio_iov, ktriov, iovlen);
}
#endif
len = auio.uio_resid;
error = sosend(fp->f_data, 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;
fp->f_wxfer++;
fp->f_wbytes += *retsize;
}
#ifdef KTRACE
if (ktriov != NULL) {
if (error == 0)
ktrgenio(p, s, UIO_WRITE, ktriov, *retsize, error);
free(ktriov, M_TEMP);
}
#endif
bad:
FRELE(fp);
if (to)
m_freem(to);
return (error);
}
int
sys_recvfrom(struct proc *p, void *v, register_t *retval)
{
struct sys_recvfrom_args /* {
syscallarg(int) s;
syscallarg(void *) buf;
syscallarg(size_t) len;
syscallarg(int) flags;
syscallarg(struct sockaddr *) from;
syscallarg(socklen_t *) fromlenaddr;
} */ *uap = v;
struct msghdr msg;
struct iovec aiov;
int error;
if (SCARG(uap, fromlenaddr)) {
error = copyin(SCARG(uap, fromlenaddr),
&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(struct proc *p, void *v, register_t *retval)
{
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;
int error;
error = copyin(SCARG(uap, msg), &msg, sizeof (msg));
if (error)
return (error);
if (msg.msg_iovlen > IOV_MAX)
return (EMSGSIZE);
if (msg.msg_iovlen > UIO_SMALLIOV)
iov = malloc(sizeof(struct iovec) * 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
if (msg.msg_iovlen > 0) {
error = copyin(msg.msg_iov, iov,
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
if (error)
goto done;
}
uiov = msg.msg_iov;
msg.msg_iov = iov;
if ((error = recvit(p, SCARG(uap, s), &msg, NULL, retval)) == 0) {
msg.msg_iov = uiov;
error = copyout(&msg, SCARG(uap, msg), sizeof(msg));
}
done:
if (iov != aiov)
free(iov, M_IOV);
return (error);
}
int
recvit(struct proc *p, int s, struct msghdr *mp, caddr_t namelenp,
register_t *retsize)
{
struct file *fp;
struct uio auio;
struct iovec *iov;
int i;
size_t len;
int error;
struct mbuf *from = NULL, *control = NULL;
#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++) {
/* Don't allow sum > SSIZE_MAX */
if (iov->iov_len > SSIZE_MAX ||
(auio.uio_resid += iov->iov_len) > SSIZE_MAX) {
error = EINVAL;
goto out;
}
}
#ifdef KTRACE
if (KTRPOINT(p, KTR_GENIO)) {
int iovlen = auio.uio_iovcnt * sizeof (struct iovec);
ktriov = malloc(iovlen, M_TEMP, M_WAITOK);
bcopy(auio.uio_iov, ktriov, iovlen);
}
#endif
len = auio.uio_resid;
error = soreceive(fp->f_data, &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, 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) {
socklen_t alen;
if (from == NULL)
alen = 0;
else {
/* save sa_len before it is destroyed by MSG_COMPAT */
alen = mp->msg_namelen;
if (alen > from->m_len)
alen = from->m_len;
/* else if alen < from->m_len ??? */
#ifdef COMPAT_OLDSOCK
if (mp->msg_flags & MSG_COMPAT)
mtod(from, struct osockaddr *)->sa_family =
mtod(from, struct sockaddr *)->sa_family;
#endif
error = copyout(mtod(from, caddr_t), mp->msg_name, alen);
if (error)
goto out;
}
mp->msg_namelen = alen;
if (namelenp &&
(error = copyout(&alen, namelenp, sizeof(alen)))) {
#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 == NULL)
len = 0;
else {
struct mbuf *m = control;
caddr_t p = 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;
}
if (!error) {
fp->f_rxfer++;
fp->f_rbytes += *retsize;
}
out:
FRELE(fp);
if (from)
m_freem(from);
if (control)
m_freem(control);
return (error);
}
/* ARGSUSED */
int
sys_shutdown(struct proc *p, void *v, register_t *retval)
{
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);
error = soshutdown(fp->f_data, SCARG(uap, how));
FRELE(fp);
return (error);
}
/* ARGSUSED */
int
sys_setsockopt(struct proc *p, void *v, register_t *retval)
{
struct sys_setsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) name;
syscallarg(const void *) val;
syscallarg(socklen_t) 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) > MCLBYTES) {
error = EINVAL;
goto bad;
}
if (SCARG(uap, val)) {
m = m_get(M_WAIT, MT_SOOPTS);
if (SCARG(uap, valsize) > MLEN) {
MCLGET(m, M_DONTWAIT);
if ((m->m_flags & M_EXT) == 0) {
error = ENOBUFS;
goto bad;
}
}
if (m == NULL) {
error = ENOBUFS;
goto bad;
}
error = copyin(SCARG(uap, val), mtod(m, caddr_t),
SCARG(uap, valsize));
if (error) {
goto bad;
}
m->m_len = SCARG(uap, valsize);
}
error = sosetopt(fp->f_data, SCARG(uap, level),
SCARG(uap, name), m);
m = NULL;
bad:
if (m)
m_freem(m);
FRELE(fp);
return (error);
}
/* ARGSUSED */
int
sys_getsockopt(struct proc *p, void *v, register_t *retval)
{
struct sys_getsockopt_args /* {
syscallarg(int) s;
syscallarg(int) level;
syscallarg(int) name;
syscallarg(void *) val;
syscallarg(socklen_t *) avalsize;
} */ *uap = v;
struct file *fp;
struct mbuf *m = NULL;
socklen_t valsize;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
return (error);
if (SCARG(uap, val)) {
error = copyin(SCARG(uap, avalsize),
&valsize, sizeof (valsize));
if (error)
goto out;
} else
valsize = 0;
if ((error = sogetopt(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), valsize);
if (error == 0)
error = copyout(&valsize,
SCARG(uap, avalsize), sizeof (valsize));
}
out:
FRELE(fp);
if (m != NULL)
(void)m_free(m);
return (error);
}
int
sys_pipe(struct proc *p, void *v, register_t *retval)
{
struct sys_pipe_args /* {
syscallarg(int *) fdp;
} */ *uap = v;
int error, fds[2];
register_t rval[2];
if ((error = sys_opipe(p, v, rval)) != 0)
return (error);
fds[0] = rval[0];
fds[1] = rval[1];
error = copyout(fds, SCARG(uap, fdp), 2 * sizeof (int));
if (error) {
fdplock(p->p_fd);
fdrelease(p, fds[0]);
fdrelease(p, fds[1]);
fdpunlock(p->p_fd);
}
return (error);
}
/*
* Get socket name.
*/
/* ARGSUSED */
int
sys_getsockname(struct proc *p, void *v, register_t *retval)
{
struct sys_getsockname_args /* {
syscallarg(int) fdes;
syscallarg(struct sockaddr *) asa;
syscallarg(socklen_t *) alen;
} */ *uap = v;
struct file *fp;
struct socket *so;
struct mbuf *m = NULL;
socklen_t len;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0)
return (error);
error = copyin(SCARG(uap, alen), &len, sizeof (len));
if (error)
goto bad;
so = fp->f_data;
m = m_getclr(M_WAIT, MT_SONAME);
error = (*so->so_proto->pr_usrreq)(so, PRU_SOCKADDR, 0, m, 0);
if (error)
goto bad;
if (len > m->m_len)
len = m->m_len;
error = copyout(mtod(m, caddr_t), SCARG(uap, asa), len);
if (error == 0)
error = copyout(&len, SCARG(uap, alen), sizeof (len));
bad:
FRELE(fp);
if (m)
m_freem(m);
return (error);
}
/*
* Get name of peer for connected socket.
*/
/* ARGSUSED */
int
sys_getpeername(struct proc *p, void *v, register_t *retval)
{
struct sys_getpeername_args /* {
syscallarg(int) fdes;
syscallarg(struct sockaddr *) asa;
syscallarg(socklen_t *) alen;
} */ *uap = v;
struct file *fp;
struct socket *so;
struct mbuf *m = NULL;
socklen_t len;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0)
return (error);
so = fp->f_data;
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0) {
FRELE(fp);
return (ENOTCONN);
}
error = copyin(SCARG(uap, alen), &len, sizeof (len));
if (error)
goto bad;
m = m_getclr(M_WAIT, MT_SONAME);
error = (*so->so_proto->pr_usrreq)(so, PRU_PEERADDR, 0, m, 0);
if (error)
goto bad;
if (len > m->m_len)
len = m->m_len;
error = copyout(mtod(m, caddr_t), SCARG(uap, asa), len);
if (error == 0)
error = copyout(&len, SCARG(uap, alen), sizeof (len));
bad:
FRELE(fp);
m_freem(m);
return (error);
}
/*
* Get eid of peer for connected socket.
*/
/* ARGSUSED */
int
sys_getpeereid(struct proc *p, void *v, register_t *retval)
{
struct sys_getpeereid_args /* {
syscallarg(int) fdes;
syscallarg(uid_t *) euid;
syscallarg(gid_t *) egid;
} */ *uap = v;
struct file *fp;
struct socket *so;
struct mbuf *m = NULL;
struct unpcbid *id;
int error;
if ((error = getsock(p->p_fd, SCARG(uap, fdes), &fp)) != 0)
return (error);
so = fp->f_data;
if (so->so_proto != pffindtype(AF_LOCAL, SOCK_STREAM)) {
FRELE(fp);
return (EOPNOTSUPP);
}
m = m_getclr(M_WAIT, MT_SONAME);
if (m == NULL) {
error = ENOBUFS;
goto bad;
}
error = (*so->so_proto->pr_usrreq)(so, PRU_PEEREID, 0, m, 0);
if (!error && m->m_len != sizeof(struct unpcbid))
error = EOPNOTSUPP;
if (error)
goto bad;
id = mtod(m, struct unpcbid *);
error = copyout(&(id->unp_euid), SCARG(uap, euid), sizeof(uid_t));
if (error == 0)
error = copyout(&(id->unp_egid), SCARG(uap, egid), sizeof(gid_t));
bad:
FRELE(fp);
m_freem(m);
return (error);
}
int
sockargs(struct mbuf **mp, const void *buf, size_t buflen, int type)
{
struct sockaddr *sa;
struct mbuf *m;
int error;
/*
* We can't allow socket names > UCHAR_MAX in length, since that
* will overflow sa_len. Also, control data more than MCLBYTES in
* length is just too much.
*/
if (buflen > (type == MT_SONAME ? UCHAR_MAX : MCLBYTES))
return (EINVAL);
/* Allocate an mbuf to hold the arguments. */
m = m_get(M_WAIT, type);
if ((u_int)buflen > MLEN) {
MCLGET(m, M_WAITOK);
if ((m->m_flags & M_EXT) == 0) {
m_free(m);
return ENOBUFS;
}
}
m->m_len = buflen;
error = copyin(buf, mtod(m, caddr_t), 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(struct filedesc *fdp, int fdes, struct file **fpp)
{
struct file *fp;
if ((fp = fd_getfile(fdp, fdes)) == NULL)
return (EBADF);
if (fp->f_type != DTYPE_SOCKET)
return (ENOTSOCK);
*fpp = fp;
FREF(fp);
return (0);
}
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