sys_socket.c revision 96972
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 * $FreeBSD: head/sys/kern/sys_socket.c 96972 2002-05-20 05:41:09Z tanimura $ 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, cred, flags, td) 61 struct file *fp; 62 struct uio *uio; 63 struct ucred *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, cred, flags, td) 79 struct file *fp; 80 struct uio *uio; 81 struct ucred *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, td) 97 struct file *fp; 98 u_long cmd; 99 register caddr_t data; 100 struct thread *td; 101{ 102 register struct socket *so = (struct socket *)fp->f_data; 103 104 switch (cmd) { 105 106 case FIONBIO: 107 SOCK_LOCK(so); 108 if (*(int *)data) 109 so->so_state |= SS_NBIO; 110 else 111 so->so_state &= ~SS_NBIO; 112 SOCK_UNLOCK(so); 113 return (0); 114 115 case FIOASYNC: 116 SOCK_LOCK(so); 117 if (*(int *)data) { 118 so->so_state |= SS_ASYNC; 119 so->so_rcv.sb_flags |= SB_ASYNC; 120 so->so_snd.sb_flags |= SB_ASYNC; 121 } else { 122 so->so_state &= ~SS_ASYNC; 123 so->so_rcv.sb_flags &= ~SB_ASYNC; 124 so->so_snd.sb_flags &= ~SB_ASYNC; 125 } 126 SOCK_UNLOCK(so); 127 return (0); 128 129 case FIONREAD: 130 *(int *)data = so->so_rcv.sb_cc; 131 return (0); 132 133 case FIOSETOWN: 134 return (fsetown(*(int *)data, &so->so_sigio)); 135 136 case FIOGETOWN: 137 *(int *)data = fgetown(so->so_sigio); 138 return (0); 139 140 case SIOCSPGRP: 141 return (fsetown(-(*(int *)data), &so->so_sigio)); 142 143 case SIOCGPGRP: 144 *(int *)data = -fgetown(so->so_sigio); 145 return (0); 146 147 case SIOCATMARK: 148 SOCK_LOCK(so); 149 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 150 SOCK_UNLOCK(so); 151 return (0); 152 } 153 /* 154 * Interface/routing/protocol specific ioctls: 155 * interface and routing ioctls should have a 156 * different entry since a socket's unnecessary 157 */ 158 if (IOCGROUP(cmd) == 'i') 159 return (ifioctl(so, cmd, data, td)); 160 if (IOCGROUP(cmd) == 'r') 161 return (rtioctl(cmd, data)); 162 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, td)); 163} 164 165int 166soo_poll(fp, events, cred, td) 167 struct file *fp; 168 int events; 169 struct ucred *cred; 170 struct thread *td; 171{ 172 struct socket *so = (struct socket *)fp->f_data; 173 return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, td); 174} 175 176int 177soo_stat(fp, ub, td) 178 struct file *fp; 179 struct stat *ub; 180 struct thread *td; 181{ 182 struct socket *so = (struct socket *)fp->f_data; 183 184 bzero((caddr_t)ub, sizeof (*ub)); 185 ub->st_mode = S_IFSOCK; 186 /* 187 * If SS_CANTRCVMORE is set, but there's still data left in the 188 * receive buffer, the socket is still readable. 189 */ 190 SOCK_LOCK(so); 191 if ((so->so_state & SS_CANTRCVMORE) == 0 || 192 so->so_rcv.sb_cc != 0) 193 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 194 if ((so->so_state & SS_CANTSENDMORE) == 0) 195 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 196 SOCK_UNLOCK(so); 197 ub->st_size = so->so_rcv.sb_cc; 198 ub->st_uid = so->so_cred->cr_uid; 199 ub->st_gid = so->so_cred->cr_gid; 200 return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); 201} 202 203/* 204 * API socket close on file pointer. We call soclose() to close the 205 * socket (including initiating closing protocols). soclose() will 206 * sorele() the file reference but the actual socket will not go away 207 * until the socket's ref count hits 0. 208 */ 209/* ARGSUSED */ 210int 211soo_close(fp, td) 212 struct file *fp; 213 struct thread *td; 214{ 215 int error = 0; 216 struct socket *so; 217 218 so = (struct socket *)fp->f_data; 219 fp->f_ops = &badfileops; 220 fp->f_data = 0; 221 222 if (so) 223 error = soclose(so); 224 return (error); 225} 226