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19c0663e5e
freebsd-skq/sys/kern/uipc_syscalls.c
Tor Egge 19c0663e5e Use KERNBASE, not 0xf0000000.
1997-08-17 17:40:11 +00:00

1317 lines
28 KiB
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/*
* 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 1.27 1997/08/16 19:15:06 wollman 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
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
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 sockaddr *sa;
int error;
error = getsock(p->p_fd, uap->s, &fp);
if (error)
return (error);
error = getsockaddr(&sa, uap->name, uap->namelen);
if (error)
return (error);
error = sobind((struct socket *)fp->f_data, sa, p);
FREE(sa, M_SONAME);
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, p));
}
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 sockaddr *sa;
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;
sa = 0;
(void) soaccept(so, &sa);
if (sa == 0) {
namelen = 0;
if (uap->name)
goto gotnoname;
return 0;
}
if ((u_long)sa < KERNBASE) {
panic("accept1 bad sa");
}
if (uap->name) {
#ifdef COMPAT_OLDSOCK
if (compat)
((struct osockaddr *)sa)->sa_family =
sa->sa_family;
#endif
if (namelen > sa->sa_len)
namelen = sa->sa_len;
error = copyout(sa, (caddr_t)uap->name, (u_int)namelen);
if (!error)
gotnoname:
error = copyout((caddr_t)&namelen,
(caddr_t)uap->anamelen, sizeof (*uap->anamelen));
}
FREE(sa, M_SONAME);
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 sockaddr *sa;
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 = getsockaddr(&sa, uap->name, uap->namelen);
if (error)
return (error);
error = soconnect(so, sa, p);
if (error)
goto bad;
if ((so->so_state & SS_NBIO) && (so->so_state & SS_ISCONNECTING)) {
FREE(sa, M_SONAME);
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;
FREE(sa, M_SONAME);
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 *control;
struct sockaddr *to;
int len, error;
struct socket *so;
#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 = getsockaddr(&to, mp->msg_name, mp->msg_namelen);
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_proto->pr_usrreqs->pru_sosend(so, to, &auio, 0, control,
flags, p);
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)
FREE(to, M_SONAME);
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, *control = 0;
caddr_t ctlbuf;
struct socket *so;
struct sockaddr *fromsa = 0;
#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;
so = (struct socket *)fp->f_data;
error = so->so_proto->pr_usrreqs->pru_soreceive(so, &fromsa, &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 || fromsa == 0)
len = 0;
else {
#ifdef COMPAT_OLDSOCK
if (mp->msg_flags & MSG_COMPAT)
((struct osockaddr *)fromsa)->sa_family =
fromsa->sa_family;
#endif
#ifndef MIN
#define MIN(a,b) ((a)>(b)?(b):(a))
#endif
len = MIN(len, fromsa->sa_len);
error = copyout(fromsa,
(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 (fromsa)
FREE(fromsa, M_SONAME);
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, p));
}
/* 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, p)) == 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);
}
/*
* 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 sockaddr *sa;
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;
sa = 0;
error = (*so->so_proto->pr_usrreqs->pru_sockaddr)(so, &sa);
if (error)
goto bad;
if (sa == 0) {
len = 0;
goto gotnothing;
}
len = MIN(len, sa->sa_len);
#ifdef COMPAT_OLDSOCK
if (compat)
((struct osockaddr *)sa)->sa_family = sa->sa_family;
#endif
error = copyout(sa, (caddr_t)uap->asa, (u_int)len);
if (error == 0)
gotnothing:
error = copyout((caddr_t)&len, (caddr_t)uap->alen,
sizeof (len));
bad:
if (sa)
FREE(sa, M_SONAME);
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 sockaddr *sa;
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);
sa = 0;
error = (*so->so_proto->pr_usrreqs->pru_peeraddr)(so, &sa);
if (error)
goto bad;
if (sa == 0) {
len = 0;
goto gotnothing;
}
len = MIN(len, sa->sa_len);
#ifdef COMPAT_OLDSOCK
if (compat)
((struct osockaddr *)sa)->sa_family =
sa->sa_family;
#endif
error = copyout(sa, (caddr_t)uap->asa, (u_int)len);
if (error)
goto bad;
gotnothing:
error = copyout((caddr_t)&len, (caddr_t)uap->alen, sizeof (len));
bad:
if (sa) FREE(sa, M_SONAME);
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
getsockaddr(namp, uaddr, len)
struct sockaddr **namp;
caddr_t uaddr;
size_t len;
{
struct sockaddr *sa;
int error;
if (len > SOCK_MAXADDRLEN)
return ENAMETOOLONG;
MALLOC(sa, struct sockaddr *, len, M_SONAME, M_WAITOK);
error = copyin(uaddr, sa, len);
if (error) {
FREE(sa, M_SONAME);
} else {
#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 = len;
*namp = sa;
}
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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