1070 lines
26 KiB
C
1070 lines
26 KiB
C
/* $NetBSD: uipc_syscalls.c,v 1.67 2001/11/12 15:25:33 lukem 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/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls.c,v 1.67 2001/11/12 15:25:33 lukem Exp $");
|
|
|
|
#include "opt_ktrace.h"
|
|
#include "opt_new_pipe.h"
|
|
|
|
#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>
|
|
|
|
#include <uvm/uvm_extern.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;
|
|
struct socket *so;
|
|
struct file *fp;
|
|
int fd, error;
|
|
|
|
fdp = p->p_fd;
|
|
/* falloc() will use the desciptor for us */
|
|
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) {
|
|
FILE_UNUSE(fp, p);
|
|
fdremove(fdp, fd);
|
|
ffree(fp);
|
|
} else {
|
|
fp->f_data = (caddr_t)so;
|
|
FILE_SET_MATURE(fp);
|
|
FILE_UNUSE(fp, p);
|
|
*retval = fd;
|
|
}
|
|
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(unsigned int) namelen;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct mbuf *nam;
|
|
int error;
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
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) {
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
error = sobind((struct socket *)fp->f_data, nam, p);
|
|
m_freem(nam);
|
|
FILE_UNUSE(fp, p);
|
|
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;
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
|
|
return (error);
|
|
error = solisten((struct socket *)fp->f_data, SCARG(uap, backlog));
|
|
FILE_UNUSE(fp, p);
|
|
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(unsigned int *) anamelen;
|
|
} */ *uap = v;
|
|
struct filedesc *fdp;
|
|
struct file *fp;
|
|
struct mbuf *nam;
|
|
unsigned int namelen;
|
|
int error, s, fd;
|
|
struct socket *so;
|
|
|
|
fdp = p->p_fd;
|
|
if (SCARG(uap, name) && (error = copyin((caddr_t)SCARG(uap, anamelen),
|
|
(caddr_t)&namelen, sizeof(namelen))))
|
|
return (error);
|
|
if (SCARG(uap, name) != NULL &&
|
|
uvm_useracc((caddr_t)SCARG(uap, name), sizeof(struct sockaddr),
|
|
B_WRITE) == FALSE)
|
|
return (EFAULT);
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
if ((error = getsock(fdp, SCARG(uap, s), &fp)) != 0)
|
|
return (error);
|
|
s = splsoftnet();
|
|
so = (struct socket *)fp->f_data;
|
|
FILE_UNUSE(fp, p);
|
|
if (!(so->so_proto->pr_flags & PR_LISTEN)) {
|
|
splx(s);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
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);
|
|
}
|
|
/* falloc() will use the descriptor for us */
|
|
if ((error = falloc(p, &fp, &fd)) != 0) {
|
|
splx(s);
|
|
return (error);
|
|
}
|
|
*retval = fd;
|
|
{ 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;
|
|
FILE_UNUSE(fp, p);
|
|
nam = m_get(M_WAIT, MT_SONAME);
|
|
if ((error = soaccept(so, nam)) == 0 && 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), namelen)) == 0)
|
|
error = copyout((caddr_t)&namelen,
|
|
(caddr_t)SCARG(uap, anamelen),
|
|
sizeof(*SCARG(uap, anamelen)));
|
|
}
|
|
/* if an error occurred, free the file descriptor */
|
|
if (error) {
|
|
fdremove(fdp, fd);
|
|
ffree(fp);
|
|
}
|
|
m_freem(nam);
|
|
splx(s);
|
|
FILE_SET_MATURE(fp);
|
|
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(unsigned int) namelen;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct socket *so;
|
|
struct mbuf *nam;
|
|
int error, s;
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
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)) {
|
|
error = EALREADY;
|
|
goto out;
|
|
}
|
|
error = sockargs(&nam, SCARG(uap, name), SCARG(uap, namelen),
|
|
MT_SONAME);
|
|
if (error)
|
|
goto out;
|
|
error = soconnect(so, nam);
|
|
if (error)
|
|
goto bad;
|
|
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
|
|
m_freem(nam);
|
|
error = EINPROGRESS;
|
|
goto out;
|
|
}
|
|
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;
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
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;
|
|
struct file *fp1, *fp2;
|
|
struct socket *so1, *so2;
|
|
int fd, error, sv[2];
|
|
|
|
fdp = p->p_fd;
|
|
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;
|
|
/* falloc() will use the descriptor for us */
|
|
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));
|
|
FILE_SET_MATURE(fp1);
|
|
FILE_SET_MATURE(fp2);
|
|
FILE_UNUSE(fp1, p);
|
|
FILE_UNUSE(fp2, p);
|
|
return (error);
|
|
free4:
|
|
FILE_UNUSE(fp2, p);
|
|
ffree(fp2);
|
|
fdremove(fdp, sv[1]);
|
|
free3:
|
|
FILE_UNUSE(fp1, p);
|
|
ffree(fp1);
|
|
fdremove(fdp, sv[0]);
|
|
free2:
|
|
(void)soclose(so2);
|
|
free1:
|
|
(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(unsigned 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;
|
|
msg.msg_flags = 0;
|
|
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(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), (caddr_t)&msg, sizeof(msg));
|
|
if (error)
|
|
return (error);
|
|
if ((unsigned int)msg.msg_iovlen > UIO_SMALLIOV) {
|
|
if ((unsigned int)msg.msg_iovlen > IOV_MAX)
|
|
return (EMSGSIZE);
|
|
iov = malloc(sizeof(struct iovec) * msg.msg_iovlen,
|
|
M_IOV, M_WAITOK);
|
|
} else
|
|
iov = aiov;
|
|
if ((unsigned int)msg.msg_iovlen > 0) {
|
|
error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
|
|
(size_t)(msg.msg_iovlen * sizeof(struct iovec)));
|
|
if (error)
|
|
goto done;
|
|
}
|
|
msg.msg_iov = iov;
|
|
msg.msg_flags = 0;
|
|
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, len, error;
|
|
struct mbuf *to, *control;
|
|
struct socket *so;
|
|
#ifdef KTRACE
|
|
struct iovec *ktriov;
|
|
#endif
|
|
|
|
#ifdef KTRACE
|
|
ktriov = NULL;
|
|
#endif
|
|
/* getsock() will use the descriptor for us */
|
|
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) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
#endif
|
|
/*
|
|
* Writes return ssize_t because -1 is returned on error.
|
|
* Therefore, we must restrict the length to SSIZE_MAX to
|
|
* avoid garbage return values.
|
|
*/
|
|
auio.uio_resid += iov->iov_len;
|
|
if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (mp->msg_name) {
|
|
error = sockargs(&to, mp->msg_name, mp->msg_namelen,
|
|
MT_SONAME);
|
|
if (error)
|
|
goto out;
|
|
} else
|
|
to = 0;
|
|
if (mp->msg_control) {
|
|
if (mp->msg_controllen < sizeof(struct cmsghdr)) {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
error = sockargs(&control, mp->msg_control,
|
|
mp->msg_controllen, MT_CONTROL);
|
|
if (error)
|
|
goto bad;
|
|
} 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);
|
|
memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, 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, s, UIO_WRITE, ktriov, *retsize, error);
|
|
free(ktriov, M_TEMP);
|
|
}
|
|
#endif
|
|
bad:
|
|
if (to)
|
|
m_freem(to);
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
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(unsigned 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(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((caddr_t)SCARG(uap, msg), (caddr_t)&msg,
|
|
sizeof(msg));
|
|
if (error)
|
|
return (error);
|
|
if ((unsigned int)msg.msg_iovlen > UIO_SMALLIOV) {
|
|
if ((unsigned int)msg.msg_iovlen > IOV_MAX)
|
|
return (EMSGSIZE);
|
|
iov = malloc(sizeof(struct iovec) * msg.msg_iovlen,
|
|
M_IOV, M_WAITOK);
|
|
} else
|
|
iov = aiov;
|
|
if ((unsigned int)msg.msg_iovlen > 0) {
|
|
error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
|
|
(size_t)(msg.msg_iovlen * sizeof(struct iovec)));
|
|
if (error)
|
|
goto done;
|
|
}
|
|
uiov = msg.msg_iov;
|
|
msg.msg_iov = iov;
|
|
msg.msg_flags = SCARG(uap, flags);
|
|
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(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, len, error;
|
|
struct mbuf *from, *control;
|
|
struct socket *so;
|
|
#ifdef KTRACE
|
|
struct iovec *ktriov;
|
|
#endif
|
|
|
|
from = 0;
|
|
control = 0;
|
|
#ifdef KTRACE
|
|
ktriov = NULL;
|
|
#endif
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
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) {
|
|
error = EINVAL;
|
|
goto out1;
|
|
}
|
|
#endif
|
|
/*
|
|
* Reads return ssize_t because -1 is returned on error.
|
|
* Therefore we must restrict the length to SSIZE_MAX to
|
|
* avoid garbage return values.
|
|
*/
|
|
auio.uio_resid += iov->iov_len;
|
|
if (iov->iov_len > SSIZE_MAX || auio.uio_resid > SSIZE_MAX) {
|
|
error = EINVAL;
|
|
goto out1;
|
|
}
|
|
}
|
|
#ifdef KTRACE
|
|
if (KTRPOINT(p, KTR_GENIO)) {
|
|
int iovlen = auio.uio_iovcnt * sizeof(struct iovec);
|
|
|
|
ktriov = malloc(iovlen, M_TEMP, M_WAITOK);
|
|
memcpy((caddr_t)ktriov, (caddr_t)auio.uio_iov, 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, 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 {
|
|
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))))
|
|
goto out;
|
|
}
|
|
if (mp->msg_control) {
|
|
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);
|
|
out1:
|
|
FILE_UNUSE(fp, p);
|
|
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;
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
|
|
return (error);
|
|
error = soshutdown((struct socket *)fp->f_data, SCARG(uap, how));
|
|
FILE_UNUSE(fp, p);
|
|
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(unsigned int) valsize;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct mbuf *m;
|
|
int error;
|
|
|
|
m = NULL;
|
|
/* getsock() will use the descriptor for us */
|
|
if ((error = getsock(p->p_fd, SCARG(uap, s), &fp)) != 0)
|
|
return (error);
|
|
if (SCARG(uap, valsize) > MLEN) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (SCARG(uap, val)) {
|
|
m = m_get(M_WAIT, MT_SOOPTS);
|
|
error = copyin(SCARG(uap, val), mtod(m, caddr_t),
|
|
SCARG(uap, valsize));
|
|
if (error) {
|
|
(void) m_free(m);
|
|
goto out;
|
|
}
|
|
m->m_len = SCARG(uap, valsize);
|
|
}
|
|
error = sosetopt((struct socket *)fp->f_data, SCARG(uap, level),
|
|
SCARG(uap, name), m);
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
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(unsigned int *) avalsize;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct mbuf *m, *m0;
|
|
unsigned int op, i, valsize;
|
|
int error;
|
|
|
|
m = NULL;
|
|
/* getsock() will use the descriptor for us */
|
|
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)
|
|
goto out;
|
|
} 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) {
|
|
op = 0;
|
|
while (m && !error && op < valsize) {
|
|
i = min(m->m_len, (valsize - op));
|
|
error = copyout(mtod(m, caddr_t), SCARG(uap, val), i);
|
|
op += i;
|
|
SCARG(uap, val) = ((u_int8_t *)SCARG(uap, val)) + i;
|
|
m0 = m;
|
|
MFREE(m0, m);
|
|
}
|
|
valsize = op;
|
|
if (error == 0)
|
|
error = copyout(&valsize,
|
|
SCARG(uap, avalsize), sizeof(valsize));
|
|
}
|
|
if (m != NULL)
|
|
(void) m_free(m);
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
return (error);
|
|
}
|
|
|
|
#ifndef NEW_PIPE
|
|
/* ARGSUSED */
|
|
int
|
|
sys_pipe(struct proc *p, void *v, register_t *retval)
|
|
{
|
|
struct filedesc *fdp;
|
|
struct file *rf, *wf;
|
|
struct socket *rso, *wso;
|
|
int fd, error;
|
|
|
|
fdp = p->p_fd;
|
|
if ((error = socreate(AF_LOCAL, &rso, SOCK_STREAM, 0)) != 0)
|
|
return (error);
|
|
if ((error = socreate(AF_LOCAL, &wso, SOCK_STREAM, 0)) != 0)
|
|
goto free1;
|
|
/* remember this socket pair implements a pipe */
|
|
wso->so_state |= SS_ISAPIPE;
|
|
rso->so_state |= SS_ISAPIPE;
|
|
/* falloc() will use the descriptor for us */
|
|
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;
|
|
FILE_SET_MATURE(rf);
|
|
FILE_SET_MATURE(wf);
|
|
FILE_UNUSE(rf, p);
|
|
FILE_UNUSE(wf, p);
|
|
return (0);
|
|
free4:
|
|
FILE_UNUSE(wf, p);
|
|
ffree(wf);
|
|
fdremove(fdp, retval[1]);
|
|
free3:
|
|
FILE_UNUSE(rf, p);
|
|
ffree(rf);
|
|
fdremove(fdp, retval[0]);
|
|
free2:
|
|
(void)soclose(wso);
|
|
free1:
|
|
(void)soclose(rso);
|
|
return (error);
|
|
}
|
|
#endif /* !NEW_PIPE */
|
|
|
|
/*
|
|
* 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(unsigned int *) alen;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct socket *so;
|
|
struct mbuf *m;
|
|
unsigned int len;
|
|
int error;
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
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)
|
|
goto out;
|
|
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), len);
|
|
if (error == 0)
|
|
error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen),
|
|
sizeof(len));
|
|
bad:
|
|
m_freem(m);
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
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(unsigned int *) alen;
|
|
} */ *uap = v;
|
|
struct file *fp;
|
|
struct socket *so;
|
|
struct mbuf *m;
|
|
unsigned int len;
|
|
int error;
|
|
|
|
/* getsock() will use the descriptor for us */
|
|
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) {
|
|
error = ENOTCONN;
|
|
goto out;
|
|
}
|
|
error = copyin((caddr_t)SCARG(uap, alen), (caddr_t)&len, sizeof(len));
|
|
if (error)
|
|
goto out;
|
|
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), len);
|
|
if (error)
|
|
goto bad;
|
|
error = copyout((caddr_t)&len, (caddr_t)SCARG(uap, alen), sizeof(len));
|
|
bad:
|
|
m_freem(m);
|
|
out:
|
|
FILE_UNUSE(fp, p);
|
|
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(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. Control data more than a page size in
|
|
* length is just too much.
|
|
*/
|
|
if (buflen > (type == MT_SONAME ? UCHAR_MAX : PAGE_SIZE))
|
|
return (EINVAL);
|
|
|
|
/* Allocate an mbuf to hold the arguments. */
|
|
m = m_get(M_WAIT, type);
|
|
if (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), buflen);
|
|
if (error) {
|
|
(void) m_free(m);
|
|
return (error);
|
|
}
|
|
*mp = m;
|
|
if (type == MT_SONAME) {
|
|
sa = mtod(m, struct sockaddr *);
|
|
#if BYTE_ORDER != BIG_ENDIAN
|
|
/*
|
|
* 4.3BSD compat thing - need to stay, since bind(2),
|
|
* connect(2), sendto(2) were not versioned for COMPAT_43.
|
|
*/
|
|
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);
|
|
|
|
FILE_USE(fp);
|
|
|
|
if (fp->f_type != DTYPE_SOCKET) {
|
|
FILE_UNUSE(fp, NULL);
|
|
return (ENOTSOCK);
|
|
}
|
|
*fpp = fp;
|
|
return (0);
|
|
}
|