sys_socket.c revision 1.4.4.1
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 1.4.4.1 1993/09/24 08:51:36 mycroft Exp $ 35 */ 36 37 #include "param.h" 38 #include "systm.h" 39 #include "file.h" 40 #include "mbuf.h" 41 #include "protosw.h" 42 #include "socket.h" 43 #include "socketvar.h" 44 #include "ioctl.h" 45 #include "stat.h" 46 47 #include "machine/cpu.h" 48 49 #include "net/if.h" 50 #include "net/route.h" 51 52 struct fileops socketops = 53 { soo_read, soo_write, soo_ioctl, soo_select, soo_close }; 54 55 /* ARGSUSED */ 56 int 57 soo_read(fp, uio, cred) 58 struct file *fp; 59 struct uio *uio; 60 struct ucred *cred; 61 { 62 63 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0, 64 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 65 } 66 67 /* ARGSUSED */ 68 int 69 soo_write(fp, uio, cred) 70 struct file *fp; 71 struct uio *uio; 72 struct ucred *cred; 73 { 74 75 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0, 76 uio, (struct mbuf *)0, (struct mbuf *)0, 0)); 77 } 78 79 int 80 soo_ioctl(fp, cmd, data, p) 81 struct file *fp; 82 int cmd; 83 register caddr_t data; 84 struct proc *p; 85 { 86 register struct socket *so = (struct socket *)fp->f_data; 87 88 switch (cmd) { 89 90 case FIONBIO: 91 if (*(int *)data) 92 so->so_state |= SS_NBIO; 93 else 94 so->so_state &= ~SS_NBIO; 95 return (0); 96 97 case FIOASYNC: 98 if (*(int *)data) { 99 so->so_state |= SS_ASYNC; 100 so->so_rcv.sb_flags |= SB_ASYNC; 101 so->so_snd.sb_flags |= SB_ASYNC; 102 } else { 103 so->so_state &= ~SS_ASYNC; 104 so->so_rcv.sb_flags &= ~SB_ASYNC; 105 so->so_snd.sb_flags &= ~SB_ASYNC; 106 } 107 return (0); 108 109 case FIONREAD: 110 *(int *)data = so->so_rcv.sb_cc; 111 return (0); 112 113 case SIOCSPGRP: 114 so->so_pgid = *(int *)data; 115 return (0); 116 117 case SIOCGPGRP: 118 *(int *)data = so->so_pgid; 119 return (0); 120 121 case SIOCATMARK: 122 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 123 return (0); 124 } 125 /* 126 * Interface/routing/protocol specific ioctls: 127 * interface and routing ioctls should have a 128 * different entry since a socket's unnecessary 129 */ 130 if (IOCGROUP(cmd) == 'i') 131 return (ifioctl(so, cmd, data, p)); 132 if (IOCGROUP(cmd) == 'r') 133 return (rtioctl(cmd, data, p)); 134 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 135 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0)); 136 } 137 138 int 139 soo_select(fp, which, p) 140 struct file *fp; 141 int which; 142 struct proc *p; 143 { 144 register struct socket *so = (struct socket *)fp->f_data; 145 register int s = splnet(); 146 147 switch (which) { 148 149 case FREAD: 150 if (soreadable(so)) { 151 splx(s); 152 return (1); 153 } 154 sbselqueue(&so->so_rcv, p); 155 break; 156 157 case FWRITE: 158 if (sowriteable(so)) { 159 splx(s); 160 return (1); 161 } 162 sbselqueue(&so->so_snd, p); 163 break; 164 165 case 0: 166 if (so->so_oobmark || 167 (so->so_state & SS_RCVATMARK)) { 168 splx(s); 169 return (1); 170 } 171 sbselqueue(&so->so_rcv, p); 172 break; 173 } 174 splx(s); 175 return (0); 176 } 177 178 int 179 soo_stat(so, ub) 180 register struct socket *so; 181 register struct stat *ub; 182 { 183 184 bzero((caddr_t)ub, sizeof (*ub)); 185 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 186 (struct mbuf *)ub, (struct mbuf *)0, 187 (struct mbuf *)0)); 188 } 189 190 /* ARGSUSED */ 191 int 192 soo_close(fp, p) 193 struct file *fp; 194 struct proc *p; 195 { 196 int error = 0; 197 198 if (fp->f_data) 199 error = soclose((struct socket *)fp->f_data); 200 fp->f_data = 0; 201 return (error); 202 } 203
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