BSD 4_3_Net_2 release

[unix-history] / usr / src / sys / kern / sys_socket.c

/*
* Copyright (c) 1982, 1986, 1990 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.
*
*      @(#)sys_socket.c        7.11 (Berkeley) 4/16/91
*/

#include "param.h"
#include "systm.h"
#include "file.h"
#include "mbuf.h"
#include "protosw.h"
#include "socket.h"
#include "socketvar.h"
#include "ioctl.h"
#include "stat.h"

#include "net/if.h"
#include "net/route.h"

struct  fileops socketops =
   { soo_read, soo_write, soo_ioctl, soo_select, soo_close };

/* ARGSUSED */
soo_read(fp, uio, cred)
       struct file *fp;
       struct uio *uio;
       struct ucred *cred;
{

       return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
               uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
}

/* ARGSUSED */
soo_write(fp, uio, cred)
       struct file *fp;
       struct uio *uio;
       struct ucred *cred;
{

       return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
               uio, (struct mbuf *)0, (struct mbuf *)0, 0));
}

soo_ioctl(fp, cmd, data, p)
       struct file *fp;
       int cmd;
       register caddr_t data;
       struct proc *p;
{
       register struct socket *so = (struct socket *)fp->f_data;

       switch (cmd) {

       case FIONBIO:
               if (*(int *)data)
                       so->so_state |= SS_NBIO;
               else
                       so->so_state &= ~SS_NBIO;
               return (0);

       case FIOASYNC:
               if (*(int *)data) {
                       so->so_state |= SS_ASYNC;
                       so->so_rcv.sb_flags |= SB_ASYNC;
                       so->so_snd.sb_flags |= SB_ASYNC;
               } else {
                       so->so_state &= ~SS_ASYNC;
                       so->so_rcv.sb_flags &= ~SB_ASYNC;
                       so->so_snd.sb_flags &= ~SB_ASYNC;
               }
               return (0);

       case FIONREAD:
               *(int *)data = so->so_rcv.sb_cc;
               return (0);

       case SIOCSPGRP:
               so->so_pgid = *(int *)data;
               return (0);

       case SIOCGPGRP:
               *(int *)data = so->so_pgid;
               return (0);

       case SIOCATMARK:
               *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
               return (0);
       }
       /*
        * Interface/routing/protocol specific ioctls:
        * interface and routing ioctls should have a
        * different entry since a socket's unnecessary
        */
       if (IOCGROUP(cmd) == 'i')
               return (ifioctl(so, cmd, data, p));
       if (IOCGROUP(cmd) == 'r')
               return (rtioctl(cmd, data, p));
       return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 
           (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
}

soo_select(fp, which, p)
       struct file *fp;
       int which;
       struct proc *p;
{
       register struct socket *so = (struct socket *)fp->f_data;
       register int s = splnet();

       switch (which) {

       case FREAD:
               if (soreadable(so)) {
                       splx(s);
                       return (1);
               }
               sbselqueue(&so->so_rcv, p);
               break;

       case FWRITE:
               if (sowriteable(so)) {
                       splx(s);
                       return (1);
               }
               sbselqueue(&so->so_snd, p);
               break;

       case 0:
               if (so->so_oobmark ||
                   (so->so_state & SS_RCVATMARK)) {
                       splx(s);
                       return (1);
               }
               sbselqueue(&so->so_rcv, p);
               break;
       }
       splx(s);
       return (0);
}

soo_stat(so, ub)
       register struct socket *so;
       register struct stat *ub;
{

       bzero((caddr_t)ub, sizeof (*ub));
       return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
           (struct mbuf *)ub, (struct mbuf *)0, 
           (struct mbuf *)0));
}

/* ARGSUSED */
soo_close(fp, p)
       struct file *fp;
       struct proc *p;
{
       int error = 0;

       if (fp->f_data)
               error = soclose((struct socket *)fp->f_data);
       fp->f_data = 0;
       return (error);
}