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 * $Id: sys_socket.c,v 1.5 1995/05/30 08:05:59 rgrimes Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/proc.h> 40 #include <sys/file.h> 41 #include <sys/mbuf.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/stat.h> 45 #include <sys/socketvar.h> 46 #include <sys/ioctl.h> 47 #include <sys/stat.h> 48 49 #include <net/if.h> 50 #include <net/route.h> 51 52 static int soo_read __P((struct file *fp, struct uio *uio, 53 struct ucred *cred)); 54 static int soo_write __P((struct file *fp, struct uio *uio, 55 struct ucred *cred)); 56 static int soo_close __P((struct file *fp, struct proc *p)); 57 58 struct fileops socketops = 59 { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; 60 61 /* ARGSUSED */ 62 static int 63 soo_read(fp, uio, cred) 64 struct file *fp; 65 struct uio *uio; 66 struct ucred *cred; 67 { 68 69 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 70 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 71 } 72 73 /* ARGSUSED */ 74 static int 75 soo_write(fp, uio, cred) 76 struct file *fp; 77 struct uio *uio; 78 struct ucred *cred; 79 { 80 81 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 82 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 83 } 84 85 int 86 soo_ioctl(fp, cmd, data, p) 87 struct file *fp; 88 int cmd; 89 register caddr_t data; 90 struct proc *p; 91 { 92 register struct socket *so = (struct socket *)fp->f_data; 93 94 switch (cmd) { 95 96 case FIONBIO: 97 if (*(int *)data) 98 so->so_state |= SS_NBIO; 99 else 100 so->so_state &= ~SS_NBIO; 101 return (0); 102 103 case FIOASYNC: 104 if (*(int *)data) { 105 so->so_state |= SS_ASYNC; 106 so->so_rcv.sb_flags |= SB_ASYNC; 107 so->so_snd.sb_flags |= SB_ASYNC; 108 } else { 109 so->so_state &= ~SS_ASYNC; 110 so->so_rcv.sb_flags &= ~SB_ASYNC; 111 so->so_snd.sb_flags &= ~SB_ASYNC; 112 } 113 return (0); 114 115 case FIONREAD: 116 *(int *)data = so->so_rcv.sb_cc; 117 return (0); 118 119 case SIOCSPGRP: 120 so->so_pgid = *(int *)data; 121 return (0); 122 123 case SIOCGPGRP: 124 *(int *)data = so->so_pgid; 125 return (0); 126 127 case SIOCATMARK: 128 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 129 return (0); 130 } 131 /* 132 * Interface/routing/protocol specific ioctls: 133 * interface and routing ioctls should have a 134 * different entry since a socket's unnecessary 135 */ 136 if (IOCGROUP(cmd) == 'i') 137 return (ifioctl(so, cmd, data, p)); 138 if (IOCGROUP(cmd) == 'r') 139 return (rtioctl(cmd, data, p)); 140 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 141 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 142 } 143 144 int 145 soo_select(fp, which, p) 146 struct file *fp; 147 int which; 148 struct proc *p; 149 { 150 register struct socket *so = (struct socket *)fp->f_data; 151 register int s = splnet(); 152 153 switch (which) { 154 155 case FREAD: 156 if (soreadable(so)) { 157 splx(s); 158 return (1); 159 } 160 selrecord(p, &so->so_rcv.sb_sel); 161 so->so_rcv.sb_flags |= SB_SEL; 162 break; 163 164 case FWRITE: 165 if (sowriteable(so)) { 166 splx(s); 167 return (1); 168 } 169 selrecord(p, &so->so_snd.sb_sel); 170 so->so_snd.sb_flags |= SB_SEL; 171 break; 172 173 case 0: 174 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) { 175 splx(s); 176 return (1); 177 } 178 selrecord(p, &so->so_rcv.sb_sel); 179 so->so_rcv.sb_flags |= SB_SEL; 180 break; 181 } 182 splx(s); 183 return (0); 184 } 185 186 int 187 soo_stat(so, ub) 188 register struct socket *so; 189 register struct stat *ub; 190 { 191 192 bzero((caddr_t)ub, sizeof (*ub)); 193 ub->st_mode = S_IFSOCK; 194 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 195 (struct mbuf *)ub, (struct mbuf *)0, 196 (struct mbuf *)0)); 197 } 198 199 /* ARGSUSED */ 200 static int 201 soo_close(fp, p) 202 struct file *fp; 203 struct proc *p; 204 { 205 int error = 0; 206 207 if (fp->f_data) 208 error = soclose((struct socket *)fp->f_data); 209 fp->f_data = 0; 210 return (error); 211 } 212