NetBSD/sys/compat/svr4/svr4_net.c

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/* $NetBSD: svr4_net.c,v 1.13 1997/11/16 22:50:57 christos Exp $ */
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/*
* Copyright (c) 1994 Christos Zoulas
* Copyright (c) 1997 Todd Vierling
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* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
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* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
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* 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. The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*
* Emulate /dev/{udp,tcp,...}
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/file.h>
#include <sys/filedesc.h>
#include <sys/fcntl.h>
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#include <sys/select.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/protosw.h>
#include <sys/domain.h>
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#include <net/if.h>
#include <netinet/in.h>
#include <sys/proc.h>
#include <sys/vnode.h>
#include <sys/device.h>
#include <sys/conf.h>
#include <sys/mount.h>
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#include <sys/syscallargs.h>
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#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_util.h>
#include <compat/svr4/svr4_signal.h>
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#include <compat/svr4/svr4_syscallargs.h>
#include <compat/svr4/svr4_ioctl.h>
#include <compat/svr4/svr4_stropts.h>
#include <compat/svr4/svr4_socket.h>
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/*
* Device minor numbers
*/
enum {
dev_ptm = 10,
dev_arp = 26,
dev_icmp = 27,
dev_ip = 28,
dev_tcp = 35,
dev_udp = 36,
dev_rawip = 37,
dev_unix_dgram = 38,
dev_unix_stream = 39,
dev_unix_ord_stream = 40
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};
int svr4_netattach __P((int));
static int svr4_soo_close __P((struct file *, struct proc *));
static int svr4_ptm_alloc __P((struct proc *));
static struct fileops svr4_netops = {
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soo_read, soo_write, soo_ioctl, soo_poll, svr4_soo_close
};
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/*
* Used by new config, but we don't need it.
*/
int
svr4_netattach(n)
int n;
{
return 0;
}
int
svr4_netopen(dev, flag, mode, p)
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dev_t dev;
int flag;
int mode;
struct proc *p;
{
int type, protocol;
int fd;
struct file *fp;
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struct socket *so;
int error;
int family;
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DPRINTF(("netopen("));
if (p->p_dupfd >= 0)
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return ENODEV;
switch (minor(dev)) {
case dev_udp:
family = AF_INET;
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type = SOCK_DGRAM;
protocol = IPPROTO_UDP;
DPRINTF(("udp, "));
break;
case dev_tcp:
family = AF_INET;
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type = SOCK_STREAM;
protocol = IPPROTO_TCP;
DPRINTF(("tcp, "));
break;
case dev_ip:
case dev_rawip:
family = AF_INET;
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type = SOCK_RAW;
protocol = IPPROTO_IP;
DPRINTF(("ip, "));
break;
case dev_icmp:
family = AF_INET;
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type = SOCK_RAW;
protocol = IPPROTO_ICMP;
DPRINTF(("icmp, "));
break;
case dev_unix_dgram:
family = AF_UNIX;
type = SOCK_DGRAM;
protocol = 0;
DPRINTF(("unix-dgram, "));
break;
case dev_unix_stream:
case dev_unix_ord_stream:
family = AF_UNIX;
type = SOCK_STREAM;
protocol = 0;
DPRINTF(("unix-stream, "));
break;
case dev_ptm:
DPRINTF(("ptm);\n"));
return svr4_ptm_alloc(p);
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default:
DPRINTF(("%d);\n", minor(dev)));
return EOPNOTSUPP;
}
if ((error = falloc(p, &fp, &fd)) != 0)
return error;
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if ((error = socreate(family, &so, type, protocol)) != 0) {
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DPRINTF(("socreate error %d\n", error));
p->p_fd->fd_ofiles[fd] = 0;
ffree(fp);
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return error;
}
fp->f_flag = FREAD|FWRITE;
fp->f_type = DTYPE_SOCKET;
fp->f_ops = &svr4_netops;
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fp->f_data = (caddr_t)so;
(void) svr4_stream_get(fp);
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DPRINTF(("ok);\n"));
p->p_dupfd = fd;
return ENXIO;
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}
static int
svr4_soo_close(fp, p)
struct file *fp;
struct proc *p;
{
struct socket *so = (struct socket *) fp->f_data;
svr4_delete_socket(p, fp);
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free(so->so_internal, M_NETADDR);
return soo_close(fp, p);
}
static int
svr4_ptm_alloc(p)
struct proc *p;
{
/*
* XXX this is very, very ugly. But I can't find a better
* way that won't duplicate a big amount of code from
* sys_open(). Ho hum...
*
* Fortunately for us, Solaris (at least 2.5.1) makes the
* /dev/ptmx open automatically just open a pty, that (after
* STREAMS I_PUSHes), is just a plain pty. fstat() is used
* to get the minor device number to map to a tty.
*
* Cycle through the names. If sys_open() returns ENOENT (or
* ENXIO), short circuit the cycle and exit.
*/
static char ptyname[] = "/dev/ptyXX";
#if _MACHINE_ARCH == i386
/* XXX. Fix this, pcvt people! */
static char ttyletters[] = "pqrstuwxyzPQRST";
#else
static char ttyletters[] = "pqrstuvwxyzPQRST";
#endif
static char ttynumbers[] = "0123456789abcdef";
caddr_t sg = stackgap_init(p->p_emul);
char *path = stackgap_alloc(&sg, sizeof(ptyname));
struct sys_open_args oa;
int l = 0, n = 0;
register_t fd = -1;
int error;
SCARG(&oa, path) = path;
SCARG(&oa, flags) = O_RDWR;
SCARG(&oa, mode) = 0;
while (fd == -1) {
ptyname[8] = ttyletters[l];
ptyname[9] = ttynumbers[n];
if ((error = copyout(ptyname, path, sizeof(ptyname))) != 0)
return error;
switch (error = sys_open(p, &oa, &fd)) {
case ENOENT:
case ENXIO:
return error;
case 0:
p->p_dupfd = fd;
return ENXIO;
default:
if (ttynumbers[++n] == '\0') {
if (ttyletters[++l] == '\0')
break;
n = 0;
}
}
}
return ENOENT;
}
struct svr4_strm *
svr4_stream_get(fp)
struct file *fp;
{
struct socket *so;
struct svr4_strm *st;
if (fp == NULL || fp->f_type != DTYPE_SOCKET)
return NULL;
so = (struct socket *) fp->f_data;
if (so->so_internal)
return so->so_internal;
/* Allocate a new one. */
fp->f_ops = &svr4_netops;
st = malloc(sizeof(struct svr4_strm), M_NETADDR, M_WAITOK);
st->s_family = so->so_proto->pr_domain->dom_family;
st->s_cmd = ~0;
st->s_afd = -1;
so->so_internal = st;
return st;
}