1 /* $OpenBSD: sys_socket.c,v 1.7 2001/05/14 12:38:47 art 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_kqfilter, 55 soo_stat, soo_close 56 }; 57 58 /* ARGSUSED */ 59 int 60 soo_read(fp, poff, uio, cred) 61 struct file *fp; 62 off_t *poff; 63 struct uio *uio; 64 struct ucred *cred; 65 { 66 67 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 68 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 69 } 70 71 /* ARGSUSED */ 72 int 73 soo_write(fp, poff, uio, cred) 74 struct file *fp; 75 off_t *poff; 76 struct uio *uio; 77 struct ucred *cred; 78 { 79 80 return (sosend((struct socket *)fp->f_data, (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 register caddr_t data; 89 struct proc *p; 90 { 91 register 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 so->so_siguid = p->p_cred->p_ruid; 121 so->so_sigeuid = p->p_ucred->cr_uid; 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_usrreq)(so, PRU_CONTROL, 142 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 143 } 144 145 int 146 soo_select(fp, which, p) 147 struct file *fp; 148 int which; 149 struct proc *p; 150 { 151 register struct socket *so = (struct socket *)fp->f_data; 152 register int s = splsoftnet(); 153 154 switch (which) { 155 156 case FREAD: 157 if (soreadable(so)) { 158 splx(s); 159 return (1); 160 } 161 selrecord(p, &so->so_rcv.sb_sel); 162 so->so_rcv.sb_flags |= SB_SEL; 163 break; 164 165 case FWRITE: 166 if (sowriteable(so)) { 167 splx(s); 168 return (1); 169 } 170 selrecord(p, &so->so_snd.sb_sel); 171 so->so_snd.sb_flags |= SB_SEL; 172 break; 173 174 case 0: 175 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) { 176 splx(s); 177 return (1); 178 } 179 selrecord(p, &so->so_rcv.sb_sel); 180 so->so_rcv.sb_flags |= SB_SEL; 181 break; 182 } 183 splx(s); 184 return (0); 185 } 186 187 int 188 soo_stat(fp, ub, p) 189 struct file *fp; 190 struct stat *ub; 191 struct proc *p; 192 { 193 struct socket *so = (struct socket *)fp->f_data; 194 195 bzero((caddr_t)ub, sizeof (*ub)); 196 ub->st_mode = S_IFSOCK; 197 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 198 (struct mbuf *)ub, (struct mbuf *)0, 199 (struct mbuf *)0)); 200 } 201 202 /* ARGSUSED */ 203 int 204 soo_close(fp, p) 205 struct file *fp; 206 struct proc *p; 207 { 208 int error = 0; 209 210 if (fp->f_data) 211 error = soclose((struct socket *)fp->f_data); 212 fp->f_data = 0; 213 return (error); 214 } 215