sys_socket.c revision 1.5
1 /* 2 * Copyright (c) 1982, 1986, 1990 Regents of the University of California. 3 * 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 * from: @(#)sys_socket.c 7.11 (Berkeley) 4/16/91 34 * $Id: sys_socket.c,v 1.5 1993/12/18 04:21:41 mycroft Exp $ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/file.h> 40 #include <sys/mbuf.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/ioctl.h> 45 #include <sys/stat.h> 46 47 #include <net/if.h> 48 #include <net/route.h> 49 50 struct fileops socketops = 51 { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; 52 53 /* ARGSUSED */ 54 int 55 soo_read(fp, uio, cred) 56 struct file *fp; 57 struct uio *uio; 58 struct ucred *cred; 59 { 60 61 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 62 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 63 } 64 65 /* ARGSUSED */ 66 int 67 soo_write(fp, uio, cred) 68 struct file *fp; 69 struct uio *uio; 70 struct ucred *cred; 71 { 72 73 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 74 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 75 } 76 77 int 78 soo_ioctl(fp, cmd, data, p) 79 struct file *fp; 80 int cmd; 81 register caddr_t data; 82 struct proc *p; 83 { 84 register struct socket *so = (struct socket *)fp->f_data; 85 86 switch (cmd) { 87 88 case FIONBIO: 89 if (*(int *)data) 90 so->so_state |= SS_NBIO; 91 else 92 so->so_state &= ~SS_NBIO; 93 return (0); 94 95 case FIOASYNC: 96 if (*(int *)data) { 97 so->so_state |= SS_ASYNC; 98 so->so_rcv.sb_flags |= SB_ASYNC; 99 so->so_snd.sb_flags |= SB_ASYNC; 100 } else { 101 so->so_state &= ~SS_ASYNC; 102 so->so_rcv.sb_flags &= ~SB_ASYNC; 103 so->so_snd.sb_flags &= ~SB_ASYNC; 104 } 105 return (0); 106 107 case FIONREAD: 108 *(int *)data = so->so_rcv.sb_cc; 109 return (0); 110 111 case SIOCSPGRP: 112 so->so_pgid = *(int *)data; 113 return (0); 114 115 case SIOCGPGRP: 116 *(int *)data = so->so_pgid; 117 return (0); 118 119 case SIOCATMARK: 120 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 121 return (0); 122 } 123 /* 124 * Interface/routing/protocol specific ioctls: 125 * interface and routing ioctls should have a 126 * different entry since a socket's unnecessary 127 */ 128 if (IOCGROUP(cmd) == 'i') 129 return (ifioctl(so, cmd, data, p)); 130 if (IOCGROUP(cmd) == 'r') 131 return (rtioctl(cmd, data, p)); 132 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 133 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 134 } 135 136 int 137 soo_select(fp, which, p) 138 struct file *fp; 139 int which; 140 struct proc *p; 141 { 142 register struct socket *so = (struct socket *)fp->f_data; 143 register int s = splnet(); 144 145 switch (which) { 146 147 case FREAD: 148 if (soreadable(so)) { 149 splx(s); 150 return (1); 151 } 152 sbselqueue(&so->so_rcv, p); 153 break; 154 155 case FWRITE: 156 if (sowriteable(so)) { 157 splx(s); 158 return (1); 159 } 160 sbselqueue(&so->so_snd, p); 161 break; 162 163 case 0: 164 if (so->so_oobmark || 165 (so->so_state & SS_RCVATMARK)) { 166 splx(s); 167 return (1); 168 } 169 sbselqueue(&so->so_rcv, p); 170 break; 171 } 172 splx(s); 173 return (0); 174 } 175 176 int 177 soo_stat(so, ub) 178 register struct socket *so; 179 register struct stat *ub; 180 { 181 182 bzero((caddr_t)ub, sizeof (*ub)); 183 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 184 (struct mbuf *)ub, (struct mbuf *)0, 185 (struct mbuf *)0)); 186 } 187 188 /* ARGSUSED */ 189 int 190 soo_close(fp, p) 191 struct file *fp; 192 struct proc *p; 193 { 194 int error = 0; 195 196 if (fp->f_data) 197 error = soclose((struct socket *)fp->f_data); 198 fp->f_data = 0; 199 return (error); 200 } 201
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