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freebsd-skq/sys/kern/uipc_syscalls.c
dg b95c5ce578 In accept1(), falloc() is called after the process has awoken, but prior 
to removing the connection from the queue. The problem here is that
falloc() may block and this would allow another process to accept the
connection instead. If this happens to leave the queue empty, then the
system will panic with an "accept: nothing queued".

Also changed a wakeup() to a wakeup_one() to avoid the "thundering herd"
problem on new connections in Apache (or any other application that has
multiple processes blocked in accept() for the same socket).
1997-03-31 12:30:01 +00:00

1321 lines
28 KiB
C
Raw Blame History

/*
* Copyright (c) 1982, 1986, 1989, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)uipc_syscalls.c 8.4 (Berkeley) 2/21/94
* $Id: uipc_syscalls.c,v 1.23 1997/03/23 03:36:32 bde Exp $
*/
#include "opt_ktrace.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/filedesc.h>
#include <sys/proc.h>
#include <sys/fcntl.h>
#include <sys/file.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/protosw.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/signalvar.h>
#include <sys/un.h>
#ifdef KTRACE
#include <sys/ktrace.h>
#endif
extern int sendit __P((struct proc *p, int s, struct msghdr *mp, int flags,
int *retsize));
extern int recvit __P((struct proc *p, int s, struct msghdr *mp,
caddr_t namelenp, int *retsize));
static int accept1 __P((struct proc *p, struct accept_args *uap, int *retval,
int compat));
static int getsockname1 __P((struct proc *p, struct getsockname_args *uap,
int *retval, int compat));
static int getpeername1 __P((struct proc *p, struct getpeername_args *uap,
int *retval, int compat));
/*
* System call interface to the socket abstraction.
*/
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
#define COMPAT_OLDSOCK
#endif
extern struct fileops socketops;
int
socket(p, uap, retval)
struct proc *p;
register struct socket_args /* {
int domain;
int type;
int protocol;
} */ *uap;
int *retval;
{
struct filedesc *fdp = p->p_fd;
struct socket *so;
struct file *fp;
int fd, error;
error = falloc(p, &fp, &fd);
if (error)
return (error);
fp->f_flag = FREAD|FWRITE;
fp->f_type = DTYPE_SOCKET;
fp->f_ops = &socketops;
error = socreate(uap->domain, &so, uap->type, uap->protocol, p);
if (error) {
fdp->fd_ofiles[fd] = 0;
ffree(fp);
} else {
fp->f_data = (caddr_t)so;
*retval = fd;
}
return (error);
}
/* ARGSUSED */
int
bind(p, uap, retval)
struct proc *p;
register struct bind_args /* {
int s;
caddr_t name;
int namelen;
} */ *uap;
int *retval;
{
struct file *fp;
struct mbuf *nam;
int error;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
error = sockargs(&nam, uap->name, uap->namelen, MT_SONAME);
if (error)
return (error);
error = sobind((struct socket *)fp->f_data, nam);
m_freem(nam);
return (error);
}
/* ARGSUSED */
int
listen(p, uap, retval)
struct proc *p;
register struct listen_args /* {
int s;
int backlog;
} */ *uap;
int *retval;
{
struct file *fp;
int error;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
return (solisten((struct socket *)fp->f_data, uap->backlog));
}
static int
accept1(p, uap, retval, compat)
struct proc *p;
register struct accept_args /* {
int s;
caddr_t name;
int *anamelen;
} */ *uap;
int *retval;
int compat;
{
struct file *fp;
struct mbuf *nam;
int namelen, error, s;
struct socket *head, *so;
short fflag; /* type must match fp->f_flag */
if (uap->name) {
error = copyin((caddr_t)uap->anamelen, (caddr_t)&namelen,
sizeof (namelen));
if(error)
return (error);
}
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
s = splnet();
head = (struct socket *)fp->f_data;
if ((head->so_options & SO_ACCEPTCONN) == 0) {
splx(s);
return (EINVAL);
}
if ((head->so_state & SS_NBIO) && head->so_comp.tqh_first == NULL) {
splx(s);
return (EWOULDBLOCK);
}
while (head->so_comp.tqh_first == NULL && head->so_error == 0) {
if (head->so_state & SS_CANTRCVMORE) {
head->so_error = ECONNABORTED;
break;
}
error = tsleep((caddr_t)&head->so_timeo, PSOCK | PCATCH,
"accept", 0);
if (error) {
splx(s);
return (error);
}
}
if (head->so_error) {
error = head->so_error;
head->so_error = 0;
splx(s);
return (error);
}
/*
* 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 = head->so_comp.tqh_first;
TAILQ_REMOVE(&head->so_comp, so, so_list);
head->so_qlen--;
fflag = fp->f_flag;
error = falloc(p, &fp, retval);
if (error) {
/*
* 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.
*/
TAILQ_INSERT_HEAD(&head->so_comp, so, so_list);
head->so_qlen++;
wakeup_one(&head->so_timeo);
splx(s);
return (error);
}
so->so_state &= ~SS_COMP;
so->so_head = NULL;
fp->f_type = DTYPE_SOCKET;
fp->f_flag = fflag;
fp->f_ops = &socketops;
fp->f_data = (caddr_t)so;
nam = m_get(M_WAIT, MT_SONAME);
(void) soaccept(so, nam);
if (uap->name) {
#ifdef COMPAT_OLDSOCK
if (compat)
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 */
error = copyout(mtod(nam, caddr_t), (caddr_t)uap->name,
(u_int)namelen);
if (!error)
error = copyout((caddr_t)&namelen,
(caddr_t)uap->anamelen, sizeof (*uap->anamelen));
}
m_freem(nam);
splx(s);
return (error);
}
int
accept(p, uap, retval)
struct proc *p;
struct accept_args *uap;
int *retval;
{
return (accept1(p, uap, retval, 0));
}
#ifdef COMPAT_OLDSOCK
int
oaccept(p, uap, retval)
struct proc *p;
struct accept_args *uap;
int *retval;
{
return (accept1(p, uap, retval, 1));
}
#endif /* COMPAT_OLDSOCK */
/* ARGSUSED */
int
connect(p, uap, retval)
struct proc *p;
register struct connect_args /* {
int s;
caddr_t name;
int namelen;
} */ *uap;
int *retval;
{
struct file *fp;
register struct socket *so;
struct mbuf *nam;
int error, s;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
so = (struct socket *)fp->f_data;
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING))
return (EALREADY);
error = sockargs(&nam, uap->name, 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 = splnet();
while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
"connec", 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
socketpair(p, uap, retval)
struct proc *p;
register struct socketpair_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];
error = socreate(uap->domain, &so1, uap->type, uap->protocol, p);
if (error)
return (error);
error = socreate(uap->domain, &so2, uap->type, uap->protocol, p);
if (error)
goto free1;
error = falloc(p, &fp1, &fd);
if (error)
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;
error = falloc(p, &fp2, &fd);
if (error)
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;
error = soconnect2(so1, so2);
if (error)
goto free4;
if (uap->type == SOCK_DGRAM) {
/*
* Datagram socket connection is asymmetric.
*/
error = soconnect2(so2, so1);
if (error)
goto free4;
}
error = copyout((caddr_t)sv, (caddr_t)uap->rsv, 2 * sizeof (int));
#if 0 /* old pipe(2) syscall compatability, unused these days */
retval[0] = sv[0]; /* XXX ??? */
retval[1] = sv[1]; /* XXX ??? */
#endif
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
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
error = getsock(p->p_fd, s, &fp);
if (error)
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 ((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;
error = sosend((struct socket *)fp->f_data, to, &auio,
(struct mbuf *)0, 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
sendto(p, uap, retval)
struct proc *p;
register struct sendto_args /* {
int s;
caddr_t buf;
size_t len;
int flags;
caddr_t to;
int tolen;
} */ *uap;
int *retval;
{
struct msghdr msg;
struct iovec aiov;
msg.msg_name = uap->to;
msg.msg_namelen = uap->tolen;
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
msg.msg_control = 0;
#ifdef COMPAT_OLDSOCK
msg.msg_flags = 0;
#endif
aiov.iov_base = uap->buf;
aiov.iov_len = uap->len;
return (sendit(p, uap->s, &msg, uap->flags, retval));
}
#ifdef COMPAT_OLDSOCK
int
osend(p, uap, retval)
struct proc *p;
register struct osend_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));
}
int
osendmsg(p, uap, retval)
struct proc *p;
register struct osendmsg_args /* {
int s;
caddr_t msg;
int flags;
} */ *uap;
int *retval;
{
struct msghdr msg;
struct iovec aiov[UIO_SMALLIOV], *iov;
int error;
error = copyin(uap->msg, (caddr_t)&msg, sizeof (struct omsghdr));
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;
error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
if (error)
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
int
sendmsg(p, uap, retval)
struct proc *p;
register struct sendmsg_args /* {
int s;
caddr_t msg;
int flags;
} */ *uap;
int *retval;
{
struct msghdr msg;
struct iovec aiov[UIO_SMALLIOV], *iov;
int error;
error = copyin(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, uap->s, &msg, uap->flags, retval);
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;
int *retsize;
{
struct file *fp;
struct uio auio;
register struct iovec *iov;
register int i;
int len, error;
struct mbuf *m, *from = 0, *control = 0;
caddr_t ctlbuf;
#ifdef KTRACE
struct iovec *ktriov = NULL;
#endif
error = getsock(p->p_fd, s, &fp);
if (error)
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 ((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;
error = soreceive((struct socket *)fp->f_data, &from, &auio,
(struct mbuf **)0, mp->msg_control ? &control : (struct mbuf **)0,
&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;
m = control;
mp->msg_controllen = 0;
ctlbuf = (caddr_t) mp->msg_control;
while (m && len > 0) {
unsigned int tocopy;
if (len >= m->m_len)
tocopy = m->m_len;
else {
mp->msg_flags |= MSG_CTRUNC;
tocopy = len;
}
if (error = copyout((caddr_t)mtod(m, caddr_t),
ctlbuf, tocopy))
goto out;
ctlbuf += tocopy;
len -= tocopy;
m = m->m_next;
}
mp->msg_controllen = ctlbuf - mp->msg_control;
}
out:
if (from)
m_freem(from);
if (control)
m_freem(control);
return (error);
}
int
recvfrom(p, uap, retval)
struct proc *p;
register struct recvfrom_args /* {
int s;
caddr_t buf;
size_t len;
int flags;
caddr_t from;
int *fromlenaddr;
} */ *uap;
int *retval;
{
struct msghdr msg;
struct iovec aiov;
int error;
if (uap->fromlenaddr) {
error = copyin((caddr_t)uap->fromlenaddr,
(caddr_t)&msg.msg_namelen, sizeof (msg.msg_namelen));
if (error)
return (error);
} else
msg.msg_namelen = 0;
msg.msg_name = uap->from;
msg.msg_iov = &aiov;
msg.msg_iovlen = 1;
aiov.iov_base = uap->buf;
aiov.iov_len = uap->len;
msg.msg_control = 0;
msg.msg_flags = uap->flags;
return (recvit(p, uap->s, &msg, (caddr_t)uap->fromlenaddr, retval));
}
#ifdef COMPAT_OLDSOCK
int
orecvfrom(p, uap, retval)
struct proc *p;
struct recvfrom_args *uap;
int *retval;
{
uap->flags |= MSG_COMPAT;
return (recvfrom(p, uap, retval));
}
#endif
#ifdef COMPAT_OLDSOCK
int
orecv(p, uap, retval)
struct proc *p;
register struct orecv_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));
}
/*
* 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.
*/
int
orecvmsg(p, uap, retval)
struct proc *p;
register struct orecvmsg_args /* {
int s;
struct omsghdr *msg;
int flags;
} */ *uap;
int *retval;
{
struct msghdr msg;
struct iovec aiov[UIO_SMALLIOV], *iov;
int error;
error = copyin((caddr_t)uap->msg, (caddr_t)&msg,
sizeof (struct omsghdr));
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;
msg.msg_flags = uap->flags | MSG_COMPAT;
error = copyin((caddr_t)msg.msg_iov, (caddr_t)iov,
(unsigned)(msg.msg_iovlen * sizeof (struct iovec)));
if (error)
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
int
recvmsg(p, uap, retval)
struct proc *p;
register struct recvmsg_args /* {
int s;
struct msghdr *msg;
int flags;
} */ *uap;
int *retval;
{
struct msghdr msg;
struct iovec aiov[UIO_SMALLIOV], *uiov, *iov;
register int error;
error = copyin((caddr_t)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 = uap->flags &~ MSG_COMPAT;
#else
msg.msg_flags = 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;
error = recvit(p, uap->s, &msg, (caddr_t)0, retval);
if (!error) {
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);
}
/* ARGSUSED */
int
shutdown(p, uap, retval)
struct proc *p;
register struct shutdown_args /* {
int s;
int how;
} */ *uap;
int *retval;
{
struct file *fp;
int error;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
return (soshutdown((struct socket *)fp->f_data, uap->how));
}
/* ARGSUSED */
int
setsockopt(p, uap, retval)
struct proc *p;
register struct setsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int valsize;
} */ *uap;
int *retval;
{
struct file *fp;
struct mbuf *m = NULL;
int error;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
if (uap->valsize > MLEN)
return (EINVAL);
if (uap->val) {
m = m_get(M_WAIT, MT_SOOPTS);
if (m == NULL)
return (ENOBUFS);
error = copyin(uap->val, mtod(m, caddr_t), (u_int)uap->valsize);
if (error) {
(void) m_free(m);
return (error);
}
m->m_len = uap->valsize;
}
return (sosetopt((struct socket *)fp->f_data, uap->level,
uap->name, m));
}
/* ARGSUSED */
int
getsockopt(p, uap, retval)
struct proc *p;
register struct getsockopt_args /* {
int s;
int level;
int name;
caddr_t val;
int *avalsize;
} */ *uap;
int *retval;
{
struct file *fp;
struct mbuf *m = NULL, *m0;
int op, i, valsize, error;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
if (uap->val) {
error = copyin((caddr_t)uap->avalsize, (caddr_t)&valsize,
sizeof (valsize));
if (error)
return (error);
} else
valsize = 0;
if ((error = sogetopt((struct socket *)fp->f_data, uap->level,
uap->name, &m)) == 0 && 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), uap->val, (u_int)i);
op += i;
uap->val += i;
m0 = m;
MFREE(m0,m);
}
valsize = op;
if (error == 0)
error = copyout((caddr_t)&valsize,
(caddr_t)uap->avalsize, sizeof (valsize));
}
if (m != NULL)
(void) m_free(m);
return (error);
}
#ifdef OLD_PIPE
/* ARGSUSED */
int
pipe(p, uap, retval)
struct proc *p;
struct pipe_args /* {
int dummy;
} */ *uap;
int retval[];
{
register struct filedesc *fdp = p->p_fd;
struct file *rf, *wf;
struct socket *rso, *wso;
int fd, error;
error = socreate(AF_UNIX, &rso, SOCK_STREAM, 0, p);
if (error)
return (error);
error = socreate(AF_UNIX, &wso, SOCK_STREAM, 0, p);
if (error)
goto free1;
error = falloc(p, &rf, &fd);
if (error)
goto free2;
retval[0] = fd;
rf->f_flag = FREAD | FWRITE;
rf->f_type = DTYPE_SOCKET;
rf->f_ops = &socketops;
rf->f_data = (caddr_t)rso;
error = falloc(p, &wf, &fd);
if (error)
goto free3;
wf->f_flag = FREAD | FWRITE;
wf->f_type = DTYPE_SOCKET;
wf->f_ops = &socketops;
wf->f_data = (caddr_t)wso;
retval[1] = fd;
error = unp_connect2(wso, rso);
if (error)
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);
}
#endif
/*
* Get socket name.
*/
/* ARGSUSED */
static int
getsockname1(p, uap, retval, compat)
struct proc *p;
register struct getsockname_args /* {
int fdes;
caddr_t asa;
int *alen;
} */ *uap;
int *retval;
int compat;
{
struct file *fp;
register struct socket *so;
struct mbuf *m;
int len, error;
error = getsock(p->p_fd, uap->fdes, &fp);
if (error)
return (error);
error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len));
if (error)
return (error);
so = (struct socket *)fp->f_data;
m = m_getclr(M_WAIT, MT_SONAME);
if (m == NULL)
return (ENOBUFS);
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, m);
if (error)
goto bad;
if (len > m->m_len)
len = m->m_len;
#ifdef COMPAT_OLDSOCK
if (compat)
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);
}
int
getsockname(p, uap, retval)
struct proc *p;
struct getsockname_args *uap;
int *retval;
{
return (getsockname1(p, uap, retval, 0));
}
#ifdef COMPAT_OLDSOCK
int
ogetsockname(p, uap, retval)
struct proc *p;
struct getsockname_args *uap;
int *retval;
{
return (getsockname1(p, uap, retval, 1));
}
#endif /* COMPAT_OLDSOCK */
/*
* Get name of peer for connected socket.
*/
/* ARGSUSED */
static int
getpeername1(p, uap, retval, compat)
struct proc *p;
register struct getpeername_args /* {
int fdes;
caddr_t asa;
int *alen;
} */ *uap;
int *retval;
int compat;
{
struct file *fp;
register struct socket *so;
struct mbuf *m;
int len, error;
error = getsock(p->p_fd, uap->fdes, &fp);
if (error)
return (error);
so = (struct socket *)fp->f_data;
if ((so->so_state & (SS_ISCONNECTED|SS_ISCONFIRMING)) == 0)
return (ENOTCONN);
error = copyin((caddr_t)uap->alen, (caddr_t)&len, sizeof (len));
if (error)
return (error);
m = m_getclr(M_WAIT, MT_SONAME);
if (m == NULL)
return (ENOBUFS);
error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, m);
if (error)
goto bad;
if (len > m->m_len)
len = m->m_len;
#ifdef COMPAT_OLDSOCK
if (compat)
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)
goto bad;
error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len));
bad:
m_freem(m);
return (error);
}
int
getpeername(p, uap, retval)
struct proc *p;
struct getpeername_args *uap;
int *retval;
{
return (getpeername1(p, uap, retval, 0));
}
#ifdef COMPAT_OLDSOCK
int
ogetpeername(p, uap, retval)
struct proc *p;
struct ogetpeername_args *uap;
int *retval;
{
/* XXX uap should have type `getpeername_args *' to begin with. */
return (getpeername1(p, (struct getpeername_args *)uap, retval, 1));
}
#endif /* COMPAT_OLDSOCK */
int
sockargs(mp, buf, buflen, type)
struct mbuf **mp;
caddr_t buf;
int buflen, type;
{
register struct sockaddr *sa;
register struct mbuf *m;
int error;
if ((u_int)buflen > MLEN) {
#ifdef COMPAT_OLDSOCK
if (type == MT_SONAME && (u_int)buflen <= 112)
buflen = MLEN; /* unix domain compat. hack */
else
#endif
return (EINVAL);
}
m = m_get(M_WAIT, type);
if (m == NULL)
return (ENOBUFS);
m->m_len = buflen;
error = copyin(buf, mtod(m, caddr_t), (u_int)buflen);
if (error)
(void) m_free(m);
else {
*mp = m;
if (type == MT_SONAME) {
sa = mtod(m, struct sockaddr *);
#if defined(COMPAT_OLDSOCK) && BYTE_ORDER != BIG_ENDIAN
if (sa->sa_family == 0 && sa->sa_len < AF_MAX)
sa->sa_family = sa->sa_len;
#endif
sa->sa_len = buflen;
}
}
return (error);
}
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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