sys_socket.c revision 14546
1/* 2 * Copyright (c) 1982, 1986, 1990, 1993 3 * The Regents of the University of California. 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 8.1 (Berkeley) 6/10/93 34 * $Id: sys_socket.c,v 1.6 1995/12/14 08:31:49 phk Exp $ 35 */ 36 37#include <sys/param.h> 38#include <sys/queue.h> 39#include <sys/systm.h> 40#include <sys/proc.h> 41#include <sys/file.h> 42#include <sys/mbuf.h> 43#include <sys/protosw.h> 44#include <sys/socket.h> 45#include <sys/stat.h> 46#include <sys/socketvar.h> 47#include <sys/ioctl.h> 48#include <sys/stat.h> 49 50#include <net/if.h> 51#include <net/route.h> 52 53static int soo_read __P((struct file *fp, struct uio *uio, 54 struct ucred *cred)); 55static int soo_write __P((struct file *fp, struct uio *uio, 56 struct ucred *cred)); 57static int soo_close __P((struct file *fp, struct proc *p)); 58 59struct fileops socketops = 60 { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; 61 62/* ARGSUSED */ 63static int 64soo_read(fp, uio, cred) 65 struct file *fp; 66 struct uio *uio; 67 struct ucred *cred; 68{ 69 70 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 71 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 72} 73 74/* ARGSUSED */ 75static int 76soo_write(fp, uio, cred) 77 struct file *fp; 78 struct uio *uio; 79 struct ucred *cred; 80{ 81 82 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 83 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 84} 85 86int 87soo_ioctl(fp, cmd, data, p) 88 struct file *fp; 89 int cmd; 90 register caddr_t data; 91 struct proc *p; 92{ 93 register struct socket *so = (struct socket *)fp->f_data; 94 95 switch (cmd) { 96 97 case FIONBIO: 98 if (*(int *)data) 99 so->so_state |= SS_NBIO; 100 else 101 so->so_state &= ~SS_NBIO; 102 return (0); 103 104 case FIOASYNC: 105 if (*(int *)data) { 106 so->so_state |= SS_ASYNC; 107 so->so_rcv.sb_flags |= SB_ASYNC; 108 so->so_snd.sb_flags |= SB_ASYNC; 109 } else { 110 so->so_state &= ~SS_ASYNC; 111 so->so_rcv.sb_flags &= ~SB_ASYNC; 112 so->so_snd.sb_flags &= ~SB_ASYNC; 113 } 114 return (0); 115 116 case FIONREAD: 117 *(int *)data = so->so_rcv.sb_cc; 118 return (0); 119 120 case SIOCSPGRP: 121 so->so_pgid = *(int *)data; 122 return (0); 123 124 case SIOCGPGRP: 125 *(int *)data = so->so_pgid; 126 return (0); 127 128 case SIOCATMARK: 129 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 130 return (0); 131 } 132 /* 133 * Interface/routing/protocol specific ioctls: 134 * interface and routing ioctls should have a 135 * different entry since a socket's unnecessary 136 */ 137 if (IOCGROUP(cmd) == 'i') 138 return (ifioctl(so, cmd, data, p)); 139 if (IOCGROUP(cmd) == 'r') 140 return (rtioctl(cmd, data, p)); 141 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 142 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 143} 144 145int 146soo_select(fp, which, p) 147 struct file *fp; 148 int which; 149 struct proc *p; 150{ 151 register struct socket *so = (struct socket *)fp->f_data; 152 register int s = splnet(); 153 154 switch (which) { 155 156 case FREAD: 157 if (soreadable(so)) { 158 splx(s); 159 return (1); 160 } 161 selrecord(p, &so->so_rcv.sb_sel); 162 so->so_rcv.sb_flags |= SB_SEL; 163 break; 164 165 case FWRITE: 166 if (sowriteable(so)) { 167 splx(s); 168 return (1); 169 } 170 selrecord(p, &so->so_snd.sb_sel); 171 so->so_snd.sb_flags |= SB_SEL; 172 break; 173 174 case 0: 175 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) { 176 splx(s); 177 return (1); 178 } 179 selrecord(p, &so->so_rcv.sb_sel); 180 so->so_rcv.sb_flags |= SB_SEL; 181 break; 182 } 183 splx(s); 184 return (0); 185} 186 187int 188soo_stat(so, ub) 189 register struct socket *so; 190 register struct stat *ub; 191{ 192 193 bzero((caddr_t)ub, sizeof (*ub)); 194 ub->st_mode = S_IFSOCK; 195 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 196 (struct mbuf *)ub, (struct mbuf *)0, 197 (struct mbuf *)0)); 198} 199 200/* ARGSUSED */ 201static int 202soo_close(fp, p) 203 struct file *fp; 204 struct proc *p; 205{ 206 int error = 0; 207 208 if (fp->f_data) 209 error = soclose((struct socket *)fp->f_data); 210 fp->f_data = 0; 211 return (error); 212} 213