1 /* $NetBSD: sys_socket.c,v 1.32 2001/11/12 15:25:25 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)sys_socket.c 8.3 (Berkeley) 2/14/95 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.32 2001/11/12 15:25:25 lukem Exp $"); 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/file.h> 44 #include <sys/mbuf.h> 45 #include <sys/protosw.h> 46 #include <sys/socket.h> 47 #include <sys/socketvar.h> 48 #include <sys/ioctl.h> 49 #include <sys/stat.h> 50 #include <sys/poll.h> 51 #include <sys/proc.h> 52 53 #include <net/if.h> 54 #include <net/route.h> 55 56 struct fileops socketops = 57 { soo_read, soo_write, soo_ioctl, soo_fcntl, soo_poll, soo_stat, soo_close}; 58 59 /* ARGSUSED */ 60 int 61 soo_read(fp, offset, uio, cred, flags) 62 struct file *fp; 63 off_t *offset; 64 struct uio *uio; 65 struct ucred *cred; 66 int flags; 67 { 68 struct socket *so = (struct socket *) fp->f_data; 69 return ((*so->so_receive)(so, (struct mbuf **)0, 70 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 71 } 72 73 /* ARGSUSED */ 74 int 75 soo_write(fp, offset, uio, cred, flags) 76 struct file *fp; 77 off_t *offset; 78 struct uio *uio; 79 struct ucred *cred; 80 int flags; 81 { 82 struct socket *so = (struct socket *) fp->f_data; 83 return ((*so->so_send)(so, (struct mbuf *)0, 84 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 85 } 86 87 int 88 soo_ioctl(fp, cmd, data, p) 89 struct file *fp; 90 u_long cmd; 91 caddr_t data; 92 struct proc *p; 93 { 94 struct socket *so = (struct socket *)fp->f_data; 95 96 switch (cmd) { 97 98 case FIONBIO: 99 if (*(int *)data) 100 so->so_state |= SS_NBIO; 101 else 102 so->so_state &= ~SS_NBIO; 103 return (0); 104 105 case FIOASYNC: 106 if (*(int *)data) { 107 so->so_state |= SS_ASYNC; 108 so->so_rcv.sb_flags |= SB_ASYNC; 109 so->so_snd.sb_flags |= SB_ASYNC; 110 } else { 111 so->so_state &= ~SS_ASYNC; 112 so->so_rcv.sb_flags &= ~SB_ASYNC; 113 so->so_snd.sb_flags &= ~SB_ASYNC; 114 } 115 return (0); 116 117 case FIONREAD: 118 *(int *)data = so->so_rcv.sb_cc; 119 return (0); 120 121 case SIOCSPGRP: 122 so->so_pgid = *(int *)data; 123 return (0); 124 125 case SIOCGPGRP: 126 *(int *)data = so->so_pgid; 127 return (0); 128 129 case SIOCATMARK: 130 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 131 return (0); 132 } 133 /* 134 * Interface/routing/protocol specific ioctls: 135 * interface and routing ioctls should have a 136 * different entry since a socket's unnecessary 137 */ 138 if (IOCGROUP(cmd) == 'i') 139 return (ifioctl(so, cmd, data, p)); 140 if (IOCGROUP(cmd) == 'r') 141 return (rtioctl(cmd, data, p)); 142 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 143 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0, p)); 144 } 145 146 int 147 soo_fcntl(fp, cmd, data, p) 148 struct file *fp; 149 u_int cmd; 150 caddr_t data; 151 struct proc *p; 152 { 153 if (cmd == F_SETFL) 154 return (0); 155 else 156 return (EOPNOTSUPP); 157 } 158 159 int 160 soo_poll(fp, events, p) 161 struct file *fp; 162 int events; 163 struct proc *p; 164 { 165 struct socket *so = (struct socket *)fp->f_data; 166 int revents = 0; 167 int s = splsoftnet(); 168 169 if (events & (POLLIN | POLLRDNORM)) 170 if (soreadable(so)) 171 revents |= events & (POLLIN | POLLRDNORM); 172 173 if (events & (POLLOUT | POLLWRNORM)) 174 if (sowriteable(so)) 175 revents |= events & (POLLOUT | POLLWRNORM); 176 177 if (events & (POLLPRI | POLLRDBAND)) 178 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 179 revents |= events & (POLLPRI | POLLRDBAND); 180 181 if (revents == 0) { 182 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 183 selrecord(p, &so->so_rcv.sb_sel); 184 so->so_rcv.sb_flags |= SB_SEL; 185 } 186 187 if (events & (POLLOUT | POLLWRNORM)) { 188 selrecord(p, &so->so_snd.sb_sel); 189 so->so_snd.sb_flags |= SB_SEL; 190 } 191 } 192 193 splx(s); 194 return (revents); 195 } 196 197 int 198 soo_stat(fp, ub, p) 199 struct file *fp; 200 struct stat *ub; 201 struct proc *p; 202 { 203 struct socket *so = (struct socket *)fp->f_data; 204 205 memset((caddr_t)ub, 0, sizeof(*ub)); 206 ub->st_mode = S_IFSOCK; 207 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 208 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, p)); 209 } 210 211 /* ARGSUSED */ 212 int 213 soo_close(fp, p) 214 struct file *fp; 215 struct proc *p; 216 { 217 int error = 0; 218 219 if (fp->f_data) 220 error = soclose((struct socket *)fp->f_data); 221 fp->f_data = 0; 222 return (error); 223 } 224