1 /* $NetBSD: sys_socket.c,v 1.30 2001/05/19 17:28:33 manu 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/param.h> 39 #include <sys/systm.h> 40 #include <sys/file.h> 41 #include <sys/mbuf.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/ioctl.h> 46 #include <sys/stat.h> 47 #include <sys/poll.h> 48 #include <sys/proc.h> 49 50 #include <net/if.h> 51 #include <net/route.h> 52 53 struct fileops socketops = 54 { soo_read, soo_write, soo_ioctl, soo_fcntl, soo_poll, soo_stat, soo_close}; 55 56 /* ARGSUSED */ 57 int 58 soo_read(fp, offset, uio, cred, flags) 59 struct file *fp; 60 off_t *offset; 61 struct uio *uio; 62 struct ucred *cred; 63 int flags; 64 { 65 struct socket *so = (struct socket *) fp->f_data; 66 return ((*so->so_receive)(so, (struct mbuf **)0, 67 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 68 } 69 70 /* ARGSUSED */ 71 int 72 soo_write(fp, offset, uio, cred, flags) 73 struct file *fp; 74 off_t *offset; 75 struct uio *uio; 76 struct ucred *cred; 77 int flags; 78 { 79 struct socket *so = (struct socket *) fp->f_data; 80 return ((*so->so_send)(so, (struct mbuf *)0, 81 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 82 } 83 84 int 85 soo_ioctl(fp, cmd, data, p) 86 struct file *fp; 87 u_long cmd; 88 caddr_t data; 89 struct proc *p; 90 { 91 struct socket *so = (struct socket *)fp->f_data; 92 93 switch (cmd) { 94 95 case FIONBIO: 96 if (*(int *)data) 97 so->so_state |= SS_NBIO; 98 else 99 so->so_state &= ~SS_NBIO; 100 return (0); 101 102 case FIOASYNC: 103 if ( 104 #ifndef __HAVE_MINIMAL_EMUL 105 (!(so->so_state & SS_ISAPIPE) || 106 (!(p->p_emul->e_flags & EMUL_NO_BSD_ASYNCIO_PIPE))) && 107 #endif 108 *(int *)data) { 109 so->so_state |= SS_ASYNC; 110 so->so_rcv.sb_flags |= SB_ASYNC; 111 so->so_snd.sb_flags |= SB_ASYNC; 112 } else { 113 so->so_state &= ~SS_ASYNC; 114 so->so_rcv.sb_flags &= ~SB_ASYNC; 115 so->so_snd.sb_flags &= ~SB_ASYNC; 116 } 117 return (0); 118 119 case FIONREAD: 120 *(int *)data = so->so_rcv.sb_cc; 121 return (0); 122 123 case SIOCSPGRP: 124 so->so_pgid = *(int *)data; 125 return (0); 126 127 case SIOCGPGRP: 128 *(int *)data = so->so_pgid; 129 return (0); 130 131 case SIOCATMARK: 132 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 133 return (0); 134 } 135 /* 136 * Interface/routing/protocol specific ioctls: 137 * interface and routing ioctls should have a 138 * different entry since a socket's unnecessary 139 */ 140 if (IOCGROUP(cmd) == 'i') 141 return (ifioctl(so, cmd, data, p)); 142 if (IOCGROUP(cmd) == 'r') 143 return (rtioctl(cmd, data, p)); 144 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 145 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0, p)); 146 } 147 148 int 149 soo_fcntl(fp, cmd, data, p) 150 struct file *fp; 151 u_int cmd; 152 caddr_t data; 153 struct proc *p; 154 { 155 if (cmd == F_SETFL) 156 return (0); 157 else 158 return (EOPNOTSUPP); 159 } 160 161 int 162 soo_poll(fp, events, p) 163 struct file *fp; 164 int events; 165 struct proc *p; 166 { 167 struct socket *so = (struct socket *)fp->f_data; 168 int revents = 0; 169 int s = splsoftnet(); 170 171 if (events & (POLLIN | POLLRDNORM)) 172 if (soreadable(so)) 173 revents |= events & (POLLIN | POLLRDNORM); 174 175 if (events & (POLLOUT | POLLWRNORM)) 176 if (sowriteable(so)) 177 revents |= events & (POLLOUT | POLLWRNORM); 178 179 if (events & (POLLPRI | POLLRDBAND)) 180 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 181 revents |= events & (POLLPRI | POLLRDBAND); 182 183 if (revents == 0) { 184 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 185 selrecord(p, &so->so_rcv.sb_sel); 186 so->so_rcv.sb_flags |= SB_SEL; 187 } 188 189 if (events & (POLLOUT | POLLWRNORM)) { 190 selrecord(p, &so->so_snd.sb_sel); 191 so->so_snd.sb_flags |= SB_SEL; 192 } 193 } 194 195 splx(s); 196 return (revents); 197 } 198 199 int 200 soo_stat(fp, ub, p) 201 struct file *fp; 202 struct stat *ub; 203 struct proc *p; 204 { 205 struct socket *so = (struct socket *)fp->f_data; 206 207 memset((caddr_t)ub, 0, sizeof(*ub)); 208 ub->st_mode = S_IFSOCK; 209 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 210 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, p)); 211 } 212 213 /* ARGSUSED */ 214 int 215 soo_close(fp, p) 216 struct file *fp; 217 struct proc *p; 218 { 219 int error = 0; 220 221 if (fp->f_data) 222 error = soclose((struct socket *)fp->f_data); 223 fp->f_data = 0; 224 return (error); 225 } 226