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

/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*
*      @(#)sys_socket.c        7.2 (Berkeley) %G%
*/

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

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

int     soo_rw(), soo_ioctl(), soo_select(), soo_close();
struct  fileops socketops =
   { soo_rw, soo_ioctl, soo_select, soo_close };

soo_rw(fp, rw, uio)
       struct file *fp;
       enum uio_rw rw;
       struct uio *uio;
{
       int soreceive(), sosend();

       return (
           (*(rw==UIO_READ?soreceive:sosend))
             ((struct socket *)fp->f_data, 0, uio, 0, 0));
}

soo_ioctl(fp, cmd, data)
       struct file *fp;
       int cmd;
       register caddr_t data;
{
       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;
               else
                       so->so_state &= ~SS_ASYNC;
               return (0);

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

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

       case SIOCGPGRP:
               *(int *)data = so->so_pgrp;
               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
        */
#define cmdbyte(x)      (((x) >> 8) & 0xff)
       if (cmdbyte(cmd) == 'i')
               return (ifioctl(so, cmd, data));
       if (cmdbyte(cmd) == 'r')
               return (rtioctl(cmd, data));
       return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 
           (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
}

soo_select(fp, which)
       struct file *fp;
       int which;
{
       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);
               break;

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

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

/*ARGSUSED*/
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));
}

soo_close(fp)
       struct file *fp;
{
       int error = 0;

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