sys_socket.c revision 104393
1208963Srdivacky/* 2208963Srdivacky * Copyright (c) 1982, 1986, 1990, 1993 3246637Sdim * The Regents of the University of California. All rights reserved. 4246637Sdim * 5208963Srdivacky * Redistribution and use in source and binary forms, with or without 6208963Srdivacky * modification, are permitted provided that the following conditions 7208963Srdivacky * are met: 8210299Sed * 1. Redistributions of source code must retain the above copyright 9210299Sed * notice, this list of conditions and the following disclaimer. 10218893Sdim * 2. Redistributions in binary form must reproduce the above copyright 11210299Sed * notice, this list of conditions and the following disclaimer in the 12210299Sed * documentation and/or other materials provided with the distribution. 13210299Sed * 3. All advertising materials mentioning features or use of this software 14210299Sed * must display the following acknowledgement: 15210299Sed * This product includes software developed by the University of 16226890Sdim * California, Berkeley and its contributors. 17208963Srdivacky * 4. Neither the name of the University nor the names of its contributors 18208963Srdivacky * 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 * $FreeBSD: head/sys/kern/sys_socket.c 104393 2002-10-03 02:13:00Z truckman $ 35 */ 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/file.h> 40#include <sys/protosw.h> 41#include <sys/socket.h> 42#include <sys/socketvar.h> 43#include <sys/filio.h> /* XXX */ 44#include <sys/sockio.h> 45#include <sys/stat.h> 46#include <sys/uio.h> 47#include <sys/filedesc.h> 48#include <sys/ucred.h> 49 50#include <net/if.h> 51#include <net/route.h> 52 53struct fileops socketops = { 54 soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter, 55 soo_stat, soo_close 56}; 57 58/* ARGSUSED */ 59int 60soo_read(fp, uio, active_cred, flags, td) 61 struct file *fp; 62 struct uio *uio; 63 struct ucred *active_cred; 64 struct thread *td; 65 int flags; 66{ 67 struct socket *so = (struct socket *)fp->f_data; 68 int error; 69 70 mtx_lock(&Giant); 71 error = so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0); 72 mtx_unlock(&Giant); 73 return (error); 74} 75 76/* ARGSUSED */ 77int 78soo_write(fp, uio, active_cred, flags, td) 79 struct file *fp; 80 struct uio *uio; 81 struct ucred *active_cred; 82 struct thread *td; 83 int flags; 84{ 85 struct socket *so = (struct socket *)fp->f_data; 86 int error; 87 88 mtx_lock(&Giant); 89 error = so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0, 90 uio->uio_td); 91 mtx_unlock(&Giant); 92 return (error); 93} 94 95int 96soo_ioctl(fp, cmd, data, active_cred, td) 97 struct file *fp; 98 u_long cmd; 99 void *data; 100 struct ucred *active_cred; 101 struct thread *td; 102{ 103 register struct socket *so = (struct socket *)fp->f_data; 104 105 switch (cmd) { 106 107 case FIONBIO: 108 if (*(int *)data) 109 so->so_state |= SS_NBIO; 110 else 111 so->so_state &= ~SS_NBIO; 112 return (0); 113 114 case FIOASYNC: 115 if (*(int *)data) { 116 so->so_state |= SS_ASYNC; 117 so->so_rcv.sb_flags |= SB_ASYNC; 118 so->so_snd.sb_flags |= SB_ASYNC; 119 } else { 120 so->so_state &= ~SS_ASYNC; 121 so->so_rcv.sb_flags &= ~SB_ASYNC; 122 so->so_snd.sb_flags &= ~SB_ASYNC; 123 } 124 return (0); 125 126 case FIONREAD: 127 *(int *)data = so->so_rcv.sb_cc; 128 return (0); 129 130 case FIOSETOWN: 131 return (fsetown(*(int *)data, &so->so_sigio)); 132 133 case FIOGETOWN: 134 *(int *)data = fgetown(&so->so_sigio); 135 return (0); 136 137 case SIOCSPGRP: 138 return (fsetown(-(*(int *)data), &so->so_sigio)); 139 140 case SIOCGPGRP: 141 *(int *)data = -fgetown(&so->so_sigio); 142 return (0); 143 144 case SIOCATMARK: 145 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 146 return (0); 147 } 148 /* 149 * Interface/routing/protocol specific ioctls: 150 * interface and routing ioctls should have a 151 * different entry since a socket's unnecessary 152 */ 153 if (IOCGROUP(cmd) == 'i') 154 return (ifioctl(so, cmd, data, td)); 155 if (IOCGROUP(cmd) == 'r') 156 return (rtioctl(cmd, data)); 157 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, td)); 158} 159 160int 161soo_poll(fp, events, active_cred, td) 162 struct file *fp; 163 int events; 164 struct ucred *active_cred; 165 struct thread *td; 166{ 167 struct socket *so = (struct socket *)fp->f_data; 168 return so->so_proto->pr_usrreqs->pru_sopoll(so, events, 169 fp->f_cred, td); 170} 171 172int 173soo_stat(fp, ub, active_cred, td) 174 struct file *fp; 175 struct stat *ub; 176 struct ucred *active_cred; 177 struct thread *td; 178{ 179 struct socket *so = (struct socket *)fp->f_data; 180 181 bzero((caddr_t)ub, sizeof (*ub)); 182 ub->st_mode = S_IFSOCK; 183 /* 184 * If SS_CANTRCVMORE is set, but there's still data left in the 185 * receive buffer, the socket is still readable. 186 */ 187 if ((so->so_state & SS_CANTRCVMORE) == 0 || 188 so->so_rcv.sb_cc != 0) 189 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 190 if ((so->so_state & SS_CANTSENDMORE) == 0) 191 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 192 ub->st_size = so->so_rcv.sb_cc; 193 ub->st_uid = so->so_cred->cr_uid; 194 ub->st_gid = so->so_cred->cr_gid; 195 return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); 196} 197 198/* 199 * API socket close on file pointer. We call soclose() to close the 200 * socket (including initiating closing protocols). soclose() will 201 * sorele() the file reference but the actual socket will not go away 202 * until the socket's ref count hits 0. 203 */ 204/* ARGSUSED */ 205int 206soo_close(fp, td) 207 struct file *fp; 208 struct thread *td; 209{ 210 int error = 0; 211 struct socket *so; 212 213 so = (struct socket *)fp->f_data; 214 fp->f_ops = &badfileops; 215 fp->f_data = 0; 216 217 if (so) 218 error = soclose(so); 219 return (error); 220} 221