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sys_socket.c revision 1.1 
      1 /*
      2  * Copyright (c) 1982, 1986, 1990 Regents of the University of California.
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  * 1. Redistributions of source code must retain the above copyright
      9  *    notice, this list of conditions and the following disclaimer.
     10  * 2. Redistributions in binary form must reproduce the above copyright
     11  *    notice, this list of conditions and the following disclaimer in the
     12  *    documentation and/or other materials provided with the distribution.
     13  * 3. All advertising materials mentioning features or use of this software
     14  *    must display the following acknowledgement:
     15  *	This product includes software developed by the University of
     16  *	California, Berkeley and its contributors.
     17  * 4. Neither the name of the University nor the names of its contributors
     18  *    may be used to endorse or promote products derived from this software
     19  *    without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     31  * SUCH DAMAGE.
     32  *
     33  *	@(#)sys_socket.c	7.11 (Berkeley) 4/16/91
     34  */
     35 
     36 #include "param.h"
     37 #include "systm.h"
     38 #include "file.h"
     39 #include "mbuf.h"
     40 #include "protosw.h"
     41 #include "socket.h"
     42 #include "socketvar.h"
     43 #include "ioctl.h"
     44 #include "stat.h"
     45 
     46 #include "net/if.h"
     47 #include "net/route.h"
     48 
     49 struct	fileops socketops =
     50     { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
     51 
     52 /* ARGSUSED */
     53 soo_read(fp, uio, cred)
     54 	struct file *fp;
     55 	struct uio *uio;
     56 	struct ucred *cred;
     57 {
     58 
     59 	return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
     60 		uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
     61 }
     62 
     63 /* ARGSUSED */
     64 soo_write(fp, uio, cred)
     65 	struct file *fp;
     66 	struct uio *uio;
     67 	struct ucred *cred;
     68 {
     69 
     70 	return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
     71 		uio, (struct mbuf *)0, (struct mbuf *)0, 0));
     72 }
     73 
     74 soo_ioctl(fp, cmd, data, p)
     75 	struct file *fp;
     76 	int cmd;
     77 	register caddr_t data;
     78 	struct proc *p;
     79 {
     80 	register struct socket *so = (struct socket *)fp->f_data;
     81 
     82 	switch (cmd) {
     83 
     84 	case FIONBIO:
     85 		if (*(int *)data)
     86 			so->so_state |= SS_NBIO;
     87 		else
     88 			so->so_state &= ~SS_NBIO;
     89 		return (0);
     90 
     91 	case FIOASYNC:
     92 		if (*(int *)data) {
     93 			so->so_state |= SS_ASYNC;
     94 			so->so_rcv.sb_flags |= SB_ASYNC;
     95 			so->so_snd.sb_flags |= SB_ASYNC;
     96 		} else {
     97 			so->so_state &= ~SS_ASYNC;
     98 			so->so_rcv.sb_flags &= ~SB_ASYNC;
     99 			so->so_snd.sb_flags &= ~SB_ASYNC;
    100 		}
    101 		return (0);
    102 
    103 	case FIONREAD:
    104 		*(int *)data = so->so_rcv.sb_cc;
    105 		return (0);
    106 
    107 	case SIOCSPGRP:
    108 		so->so_pgid = *(int *)data;
    109 		return (0);
    110 
    111 	case SIOCGPGRP:
    112 		*(int *)data = so->so_pgid;
    113 		return (0);
    114 
    115 	case SIOCATMARK:
    116 		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
    117 		return (0);
    118 	}
    119 	/*
    120 	 * Interface/routing/protocol specific ioctls:
    121 	 * interface and routing ioctls should have a
    122 	 * different entry since a socket's unnecessary
    123 	 */
    124 	if (IOCGROUP(cmd) == 'i')
    125 		return (ifioctl(so, cmd, data, p));
    126 	if (IOCGROUP(cmd) == 'r')
    127 		return (rtioctl(cmd, data, p));
    128 	return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
    129 	    (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
    130 }
    131 
    132 soo_select(fp, which, p)
    133 	struct file *fp;
    134 	int which;
    135 	struct proc *p;
    136 {
    137 	register struct socket *so = (struct socket *)fp->f_data;
    138 	register int s = splnet();
    139 
    140 	switch (which) {
    141 
    142 	case FREAD:
    143 		if (soreadable(so)) {
    144 			splx(s);
    145 			return (1);
    146 		}
    147 		sbselqueue(&so->so_rcv, p);
    148 		break;
    149 
    150 	case FWRITE:
    151 		if (sowriteable(so)) {
    152 			splx(s);
    153 			return (1);
    154 		}
    155 		sbselqueue(&so->so_snd, p);
    156 		break;
    157 
    158 	case 0:
    159 		if (so->so_oobmark ||
    160 		    (so->so_state & SS_RCVATMARK)) {
    161 			splx(s);
    162 			return (1);
    163 		}
    164 		sbselqueue(&so->so_rcv, p);
    165 		break;
    166 	}
    167 	splx(s);
    168 	return (0);
    169 }
    170 
    171 soo_stat(so, ub)
    172 	register struct socket *so;
    173 	register struct stat *ub;
    174 {
    175 
    176 	bzero((caddr_t)ub, sizeof (*ub));
    177 	return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
    178 	    (struct mbuf *)ub, (struct mbuf *)0,
    179 	    (struct mbuf *)0));
    180 }
    181 
    182 /* ARGSUSED */
    183 soo_close(fp, p)
    184 	struct file *fp;
    185 	struct proc *p;
    186 {
    187 	int error = 0;
    188 
    189 	if (fp->f_data)
    190 		error = soclose((struct socket *)fp->f_data);
    191 	fp->f_data = 0;
    192 	return (error);
    193 }
    194