1 /* $NetBSD: sys_socket.c,v 1.31 2001/06/16 21:29:32 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 (*(int *)data) { 104 so->so_state |= SS_ASYNC; 105 so->so_rcv.sb_flags |= SB_ASYNC; 106 so->so_snd.sb_flags |= SB_ASYNC; 107 } else { 108 so->so_state &= ~SS_ASYNC; 109 so->so_rcv.sb_flags &= ~SB_ASYNC; 110 so->so_snd.sb_flags &= ~SB_ASYNC; 111 } 112 return (0); 113 114 case FIONREAD: 115 *(int *)data = so->so_rcv.sb_cc; 116 return (0); 117 118 case SIOCSPGRP: 119 so->so_pgid = *(int *)data; 120 return (0); 121 122 case SIOCGPGRP: 123 *(int *)data = so->so_pgid; 124 return (0); 125 126 case SIOCATMARK: 127 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 128 return (0); 129 } 130 /* 131 * Interface/routing/protocol specific ioctls: 132 * interface and routing ioctls should have a 133 * different entry since a socket's unnecessary 134 */ 135 if (IOCGROUP(cmd) == 'i') 136 return (ifioctl(so, cmd, data, p)); 137 if (IOCGROUP(cmd) == 'r') 138 return (rtioctl(cmd, data, p)); 139 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 140 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0, p)); 141 } 142 143 int 144 soo_fcntl(fp, cmd, data, p) 145 struct file *fp; 146 u_int cmd; 147 caddr_t data; 148 struct proc *p; 149 { 150 if (cmd == F_SETFL) 151 return (0); 152 else 153 return (EOPNOTSUPP); 154 } 155 156 int 157 soo_poll(fp, events, p) 158 struct file *fp; 159 int events; 160 struct proc *p; 161 { 162 struct socket *so = (struct socket *)fp->f_data; 163 int revents = 0; 164 int s = splsoftnet(); 165 166 if (events & (POLLIN | POLLRDNORM)) 167 if (soreadable(so)) 168 revents |= events & (POLLIN | POLLRDNORM); 169 170 if (events & (POLLOUT | POLLWRNORM)) 171 if (sowriteable(so)) 172 revents |= events & (POLLOUT | POLLWRNORM); 173 174 if (events & (POLLPRI | POLLRDBAND)) 175 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 176 revents |= events & (POLLPRI | POLLRDBAND); 177 178 if (revents == 0) { 179 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 180 selrecord(p, &so->so_rcv.sb_sel); 181 so->so_rcv.sb_flags |= SB_SEL; 182 } 183 184 if (events & (POLLOUT | POLLWRNORM)) { 185 selrecord(p, &so->so_snd.sb_sel); 186 so->so_snd.sb_flags |= SB_SEL; 187 } 188 } 189 190 splx(s); 191 return (revents); 192 } 193 194 int 195 soo_stat(fp, ub, p) 196 struct file *fp; 197 struct stat *ub; 198 struct proc *p; 199 { 200 struct socket *so = (struct socket *)fp->f_data; 201 202 memset((caddr_t)ub, 0, sizeof(*ub)); 203 ub->st_mode = S_IFSOCK; 204 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 205 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, p)); 206 } 207 208 /* ARGSUSED */ 209 int 210 soo_close(fp, p) 211 struct file *fp; 212 struct proc *p; 213 { 214 int error = 0; 215 216 if (fp->f_data) 217 error = soclose((struct socket *)fp->f_data); 218 fp->f_data = 0; 219 return (error); 220 } 221