1 /* $OpenBSD: sys_socket.c,v 1.3 1997/08/31 20:42:23 deraadt Exp $ */ 2 /* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1990, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/file.h> 42 #include <sys/proc.h> 43 #include <sys/mbuf.h> 44 #include <sys/protosw.h> 45 #include <sys/socket.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 struct fileops socketops = 54 { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; 55 56 /* ARGSUSED */ 57 int 58 soo_read(fp, uio, cred) 59 struct file *fp; 60 struct uio *uio; 61 struct ucred *cred; 62 { 63 64 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 65 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 66 } 67 68 /* ARGSUSED */ 69 int 70 soo_write(fp, uio, cred) 71 struct file *fp; 72 struct uio *uio; 73 struct ucred *cred; 74 { 75 76 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 77 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 78 } 79 80 int 81 soo_ioctl(fp, cmd, data, p) 82 struct file *fp; 83 u_long cmd; 84 register caddr_t data; 85 struct proc *p; 86 { 87 register struct socket *so = (struct socket *)fp->f_data; 88 89 switch (cmd) { 90 91 case FIONBIO: 92 if (*(int *)data) 93 so->so_state |= SS_NBIO; 94 else 95 so->so_state &= ~SS_NBIO; 96 return (0); 97 98 case FIOASYNC: 99 if (*(int *)data) { 100 so->so_state |= SS_ASYNC; 101 so->so_rcv.sb_flags |= SB_ASYNC; 102 so->so_snd.sb_flags |= SB_ASYNC; 103 } else { 104 so->so_state &= ~SS_ASYNC; 105 so->so_rcv.sb_flags &= ~SB_ASYNC; 106 so->so_snd.sb_flags &= ~SB_ASYNC; 107 } 108 return (0); 109 110 case FIONREAD: 111 *(int *)data = so->so_rcv.sb_cc; 112 return (0); 113 114 case SIOCSPGRP: 115 so->so_pgid = *(int *)data; 116 so->so_siguid = p->p_cred->p_ruid; 117 so->so_sigeuid = p->p_ucred->cr_uid; 118 return (0); 119 120 case SIOCGPGRP: 121 *(int *)data = so->so_pgid; 122 return (0); 123 124 case SIOCATMARK: 125 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 126 return (0); 127 } 128 /* 129 * Interface/routing/protocol specific ioctls: 130 * interface and routing ioctls should have a 131 * different entry since a socket's unnecessary 132 */ 133 if (IOCGROUP(cmd) == 'i') 134 return (ifioctl(so, cmd, data, p)); 135 if (IOCGROUP(cmd) == 'r') 136 return (rtioctl(cmd, data, p)); 137 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 138 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 139 } 140 141 int 142 soo_select(fp, which, p) 143 struct file *fp; 144 int which; 145 struct proc *p; 146 { 147 register struct socket *so = (struct socket *)fp->f_data; 148 register int s = splsoftnet(); 149 150 switch (which) { 151 152 case FREAD: 153 if (soreadable(so)) { 154 splx(s); 155 return (1); 156 } 157 selrecord(p, &so->so_rcv.sb_sel); 158 so->so_rcv.sb_flags |= SB_SEL; 159 break; 160 161 case FWRITE: 162 if (sowriteable(so)) { 163 splx(s); 164 return (1); 165 } 166 selrecord(p, &so->so_snd.sb_sel); 167 so->so_snd.sb_flags |= SB_SEL; 168 break; 169 170 case 0: 171 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) { 172 splx(s); 173 return (1); 174 } 175 selrecord(p, &so->so_rcv.sb_sel); 176 so->so_rcv.sb_flags |= SB_SEL; 177 break; 178 } 179 splx(s); 180 return (0); 181 } 182 183 int 184 soo_stat(so, ub) 185 register struct socket *so; 186 register struct stat *ub; 187 { 188 189 bzero((caddr_t)ub, sizeof (*ub)); 190 ub->st_mode = S_IFSOCK; 191 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 192 (struct mbuf *)ub, (struct mbuf *)0, 193 (struct mbuf *)0)); 194 } 195 196 /* ARGSUSED */ 197 int 198 soo_close(fp, p) 199 struct file *fp; 200 struct proc *p; 201 { 202 int error = 0; 203 204 if (fp->f_data) 205 error = soclose((struct socket *)fp->f_data); 206 fp->f_data = 0; 207 return (error); 208 } 209