1 /* $NetBSD: sys_socket.c,v 1.20 1998/08/04 04:03:16 perry 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 49 #include <net/if.h> 50 #include <net/route.h> 51 52 struct fileops socketops = 53 { soo_read, soo_write, soo_ioctl, soo_poll, soo_close }; 54 55 /* ARGSUSED */ 56 int 57 soo_read(fp, offset, uio, cred, flags) 58 struct file *fp; 59 off_t *offset; 60 struct uio *uio; 61 struct ucred *cred; 62 int flags; 63 { 64 struct socket *so = (struct socket *) fp->f_data; 65 return ((*so->so_receive)(so, (struct mbuf **)0, 66 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 67 } 68 69 /* ARGSUSED */ 70 int 71 soo_write(fp, offset, uio, cred, flags) 72 struct file *fp; 73 off_t *offset; 74 struct uio *uio; 75 struct ucred *cred; 76 int flags; 77 { 78 struct socket *so = (struct socket *) fp->f_data; 79 return ((*so->so_send)(so, (struct mbuf *)0, 80 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 81 } 82 83 int 84 soo_ioctl(fp, cmd, data, p) 85 struct file *fp; 86 u_long cmd; 87 register caddr_t data; 88 struct proc *p; 89 { 90 register struct socket *so = (struct socket *)fp->f_data; 91 92 switch (cmd) { 93 94 case FIONBIO: 95 if (*(int *)data) 96 so->so_state |= SS_NBIO; 97 else 98 so->so_state &= ~SS_NBIO; 99 return (0); 100 101 case FIOASYNC: 102 if (*(int *)data) { 103 so->so_state |= SS_ASYNC; 104 so->so_rcv.sb_flags |= SB_ASYNC; 105 so->so_snd.sb_flags |= SB_ASYNC; 106 } else { 107 so->so_state &= ~SS_ASYNC; 108 so->so_rcv.sb_flags &= ~SB_ASYNC; 109 so->so_snd.sb_flags &= ~SB_ASYNC; 110 } 111 return (0); 112 113 case FIONREAD: 114 *(int *)data = so->so_rcv.sb_cc; 115 return (0); 116 117 case SIOCSPGRP: 118 so->so_pgid = *(int *)data; 119 return (0); 120 121 case SIOCGPGRP: 122 *(int *)data = so->so_pgid; 123 return (0); 124 125 case SIOCATMARK: 126 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 127 return (0); 128 } 129 /* 130 * Interface/routing/protocol specific ioctls: 131 * interface and routing ioctls should have a 132 * different entry since a socket's unnecessary 133 */ 134 if (IOCGROUP(cmd) == 'i') 135 return (ifioctl(so, cmd, data, p)); 136 if (IOCGROUP(cmd) == 'r') 137 return (rtioctl(cmd, data, p)); 138 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 139 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0, p)); 140 } 141 142 int 143 soo_poll(fp, events, p) 144 struct file *fp; 145 int events; 146 struct proc *p; 147 { 148 register struct socket *so = (struct socket *)fp->f_data; 149 int revents = 0; 150 register int s = splsoftnet(); 151 152 if (events & (POLLIN | POLLRDNORM)) 153 if (soreadable(so)) 154 revents |= events & (POLLIN | POLLRDNORM); 155 156 if (events & (POLLOUT | POLLWRNORM)) 157 if (sowriteable(so)) 158 revents |= events & (POLLOUT | POLLWRNORM); 159 160 if (events & (POLLPRI | POLLRDBAND)) 161 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 162 revents |= events & (POLLPRI | POLLRDBAND); 163 164 if (revents == 0) { 165 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 166 selrecord(p, &so->so_rcv.sb_sel); 167 so->so_rcv.sb_flags |= SB_SEL; 168 } 169 170 if (events & (POLLOUT | POLLWRNORM)) { 171 selrecord(p, &so->so_snd.sb_sel); 172 so->so_snd.sb_flags |= SB_SEL; 173 } 174 } 175 176 splx(s); 177 return (revents); 178 } 179 180 int 181 soo_stat(so, ub) 182 register struct socket *so; 183 register struct stat *ub; 184 { 185 186 memset((caddr_t)ub, 0, sizeof(*ub)); 187 ub->st_mode = S_IFSOCK; 188 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 189 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, 190 (struct proc *)0)); 191 } 192 193 /* ARGSUSED */ 194 int 195 soo_close(fp, p) 196 struct file *fp; 197 struct proc *p; 198 { 199 int error = 0; 200 201 if (fp->f_data) 202 error = soclose((struct socket *)fp->f_data); 203 fp->f_data = 0; 204 return (error); 205 } 206