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 1.7 1996/03/11 15:12:43 davidg Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/queue.h> 39 #include <sys/systm.h> 40 #include <sys/proc.h> 41 #include <sys/file.h> 42 #include <sys/mbuf.h> 43 #include <sys/protosw.h> 44 #include <sys/socket.h> 45 #include <sys/stat.h> 46 #include <sys/socketvar.h> 47 #include <sys/ioctl.h> 48 #include <sys/stat.h> 49 50 #include <net/if.h> 51 #include <net/route.h> 52 53 static int soo_read __P((struct file *fp, struct uio *uio, 54 struct ucred *cred)); 55 static int soo_write __P((struct file *fp, struct uio *uio, 56 struct ucred *cred)); 57 static int soo_close __P((struct file *fp, struct proc *p)); 58 59 struct fileops socketops = 60 { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; 61 62 /* ARGSUSED */ 63 static int 64 soo_read(fp, uio, cred) 65 struct file *fp; 66 struct uio *uio; 67 struct ucred *cred; 68 { 69 70 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 71 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 72 } 73 74 /* ARGSUSED */ 75 static int 76 soo_write(fp, uio, cred) 77 struct file *fp; 78 struct uio *uio; 79 struct ucred *cred; 80 { 81 82 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 83 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 84 } 85 86 int 87 soo_ioctl(fp, cmd, data, p) 88 struct file *fp; 89 int cmd; 90 register caddr_t data; 91 struct proc *p; 92 { 93 register struct socket *so = (struct socket *)fp->f_data; 94 95 switch (cmd) { 96 97 case FIONBIO: 98 if (*(int *)data) 99 so->so_state |= SS_NBIO; 100 else 101 so->so_state &= ~SS_NBIO; 102 return (0); 103 104 case FIOASYNC: 105 if (*(int *)data) { 106 so->so_state |= SS_ASYNC; 107 so->so_rcv.sb_flags |= SB_ASYNC; 108 so->so_snd.sb_flags |= SB_ASYNC; 109 } else { 110 so->so_state &= ~SS_ASYNC; 111 so->so_rcv.sb_flags &= ~SB_ASYNC; 112 so->so_snd.sb_flags &= ~SB_ASYNC; 113 } 114 return (0); 115 116 case FIONREAD: 117 *(int *)data = so->so_rcv.sb_cc; 118 return (0); 119 120 case SIOCSPGRP: 121 so->so_pgid = *(int *)data; 122 return (0); 123 124 case SIOCGPGRP: 125 *(int *)data = so->so_pgid; 126 return (0); 127 128 case SIOCATMARK: 129 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 130 return (0); 131 } 132 /* 133 * Interface/routing/protocol specific ioctls: 134 * interface and routing ioctls should have a 135 * different entry since a socket's unnecessary 136 */ 137 if (IOCGROUP(cmd) == 'i') 138 return (ifioctl(so, cmd, data, p)); 139 if (IOCGROUP(cmd) == 'r') 140 return (rtioctl(cmd, data, p)); 141 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 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_usrreqs->pru_sense)(so, ub)); 195 } 196 197 /* ARGSUSED */ 198 static int 199 soo_close(fp, p) 200 struct file *fp; 201 struct proc *p; 202 { 203 int error = 0; 204 205 if (fp->f_data) 206 error = soclose((struct socket *)fp->f_data); 207 fp->f_data = 0; 208 return (error); 209 } 210