sys_socket.c revision 101941
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 101941 2002-08-15 20:55:08Z rwatson $ 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, td) 97 struct file *fp; 98 u_long cmd; 99 void *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 if (*(int *)data) 108 so->so_state |= SS_NBIO; 109 else 110 so->so_state &= ~SS_NBIO; 111 return (0); 112 113 case FIOASYNC: 114 if (*(int *)data) { 115 so->so_state |= SS_ASYNC; 116 so->so_rcv.sb_flags |= SB_ASYNC; 117 so->so_snd.sb_flags |= SB_ASYNC; 118 } else { 119 so->so_state &= ~SS_ASYNC; 120 so->so_rcv.sb_flags &= ~SB_ASYNC; 121 so->so_snd.sb_flags &= ~SB_ASYNC; 122 } 123 return (0); 124 125 case FIONREAD: 126 *(int *)data = so->so_rcv.sb_cc; 127 return (0); 128 129 case FIOSETOWN: 130 return (fsetown(*(int *)data, &so->so_sigio)); 131 132 case FIOGETOWN: 133 *(int *)data = fgetown(so->so_sigio); 134 return (0); 135 136 case SIOCSPGRP: 137 return (fsetown(-(*(int *)data), &so->so_sigio)); 138 139 case SIOCGPGRP: 140 *(int *)data = -fgetown(so->so_sigio); 141 return (0); 142 143 case SIOCATMARK: 144 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 145 return (0); 146 } 147 /* 148 * Interface/routing/protocol specific ioctls: 149 * interface and routing ioctls should have a 150 * different entry since a socket's unnecessary 151 */ 152 if (IOCGROUP(cmd) == 'i') 153 return (ifioctl(so, cmd, data, td)); 154 if (IOCGROUP(cmd) == 'r') 155 return (rtioctl(cmd, data)); 156 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, td)); 157} 158 159int 160soo_poll(fp, events, cred, td) 161 struct file *fp; 162 int events; 163 struct ucred *cred; 164 struct thread *td; 165{ 166 struct socket *so = (struct socket *)fp->f_data; 167 return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, td); 168} 169 170int 171soo_stat(fp, ub, td) 172 struct file *fp; 173 struct stat *ub; 174 struct thread *td; 175{ 176 struct socket *so = (struct socket *)fp->f_data; 177 178 bzero((caddr_t)ub, sizeof (*ub)); 179 ub->st_mode = S_IFSOCK; 180 /* 181 * If SS_CANTRCVMORE is set, but there's still data left in the 182 * receive buffer, the socket is still readable. 183 */ 184 if ((so->so_state & SS_CANTRCVMORE) == 0 || 185 so->so_rcv.sb_cc != 0) 186 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 187 if ((so->so_state & SS_CANTSENDMORE) == 0) 188 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 189 ub->st_size = so->so_rcv.sb_cc; 190 ub->st_uid = so->so_cred->cr_uid; 191 ub->st_gid = so->so_cred->cr_gid; 192 return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); 193} 194 195/* 196 * API socket close on file pointer. We call soclose() to close the 197 * socket (including initiating closing protocols). soclose() will 198 * sorele() the file reference but the actual socket will not go away 199 * until the socket's ref count hits 0. 200 */ 201/* ARGSUSED */ 202int 203soo_close(fp, td) 204 struct file *fp; 205 struct thread *td; 206{ 207 int error = 0; 208 struct socket *so; 209 210 so = (struct socket *)fp->f_data; 211 fp->f_ops = &badfileops; 212 fp->f_data = 0; 213 214 if (so) 215 error = soclose(so); 216 return (error); 217} 218