sys_socket.c revision 1.43
1 /* $NetBSD: sys_socket.c,v 1.43 2005/02/26 21:34:55 perry Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)sys_socket.c 8.3 (Berkeley) 2/14/95 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.43 2005/02/26 21:34:55 perry Exp $"); 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 #include <sys/poll.h> 47 #include <sys/proc.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_fcntl, soo_poll, 54 soo_stat, soo_close, soo_kqfilter 55 }; 56 57 /* ARGSUSED */ 58 int 59 soo_read(fp, offset, uio, cred, flags) 60 struct file *fp; 61 off_t *offset; 62 struct uio *uio; 63 struct ucred *cred; 64 int flags; 65 { 66 struct socket *so = (struct socket *) fp->f_data; 67 return ((*so->so_receive)(so, (struct mbuf **)0, 68 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0)); 69 } 70 71 /* ARGSUSED */ 72 int 73 soo_write(fp, offset, uio, cred, flags) 74 struct file *fp; 75 off_t *offset; 76 struct uio *uio; 77 struct ucred *cred; 78 int flags; 79 { 80 struct socket *so = (struct socket *) fp->f_data; 81 return ((*so->so_send)(so, (struct mbuf *)0, 82 uio, (struct mbuf *)0, (struct mbuf *)0, 0, uio->uio_procp)); 83 } 84 85 int 86 soo_ioctl(fp, cmd, data, p) 87 struct file *fp; 88 u_long cmd; 89 void *data; 90 struct proc *p; 91 { 92 struct socket *so = (struct socket *)fp->f_data; 93 94 switch (cmd) { 95 96 case FIONBIO: 97 if (*(int *)data) 98 so->so_state |= SS_NBIO; 99 else 100 so->so_state &= ~SS_NBIO; 101 return (0); 102 103 case FIOASYNC: 104 if (*(int *)data) { 105 so->so_state |= SS_ASYNC; 106 so->so_rcv.sb_flags |= SB_ASYNC; 107 so->so_snd.sb_flags |= SB_ASYNC; 108 } else { 109 so->so_state &= ~SS_ASYNC; 110 so->so_rcv.sb_flags &= ~SB_ASYNC; 111 so->so_snd.sb_flags &= ~SB_ASYNC; 112 } 113 return (0); 114 115 case FIONREAD: 116 *(int *)data = so->so_rcv.sb_cc; 117 return (0); 118 119 case FIONWRITE: 120 *(int *)data = so->so_snd.sb_cc; 121 return (0); 122 123 case FIONSPACE: 124 /* 125 * See the comment around sbspace()'s definition 126 * in sys/socketvar.h in face of counts about maximum 127 * to understand the following test. We detect overflow 128 * and return zero. 129 */ 130 if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) 131 || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) 132 *(int *)data = 0; 133 else 134 *(int *)data = sbspace(&so->so_snd); 135 return (0); 136 137 case SIOCSPGRP: 138 case FIOSETOWN: 139 case TIOCSPGRP: 140 return fsetown(p, &so->so_pgid, cmd, data); 141 142 case SIOCGPGRP: 143 case FIOGETOWN: 144 case TIOCGPGRP: 145 return fgetown(p, so->so_pgid, cmd, data); 146 147 case SIOCATMARK: 148 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 149 return (0); 150 } 151 /* 152 * Interface/routing/protocol specific ioctls: 153 * interface and routing ioctls should have a 154 * different entry since a socket's unnecessary 155 */ 156 if (IOCGROUP(cmd) == 'i') 157 return (ifioctl(so, cmd, data, p)); 158 if (IOCGROUP(cmd) == 'r') 159 return (rtioctl(cmd, data, p)); 160 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 161 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0, p)); 162 } 163 164 int 165 soo_fcntl(fp, cmd, data, p) 166 struct file *fp; 167 u_int cmd; 168 void *data; 169 struct proc *p; 170 { 171 if (cmd == F_SETFL) 172 return (0); 173 else 174 return (EOPNOTSUPP); 175 } 176 177 int 178 soo_poll(fp, events, p) 179 struct file *fp; 180 int events; 181 struct proc *p; 182 { 183 struct socket *so = (struct socket *)fp->f_data; 184 int revents = 0; 185 int s = splsoftnet(); 186 187 if (events & (POLLIN | POLLRDNORM)) 188 if (soreadable(so)) 189 revents |= events & (POLLIN | POLLRDNORM); 190 191 if (events & (POLLOUT | POLLWRNORM)) 192 if (sowritable(so)) 193 revents |= events & (POLLOUT | POLLWRNORM); 194 195 if (events & (POLLPRI | POLLRDBAND)) 196 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) 197 revents |= events & (POLLPRI | POLLRDBAND); 198 199 if (revents == 0) { 200 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) { 201 selrecord(p, &so->so_rcv.sb_sel); 202 so->so_rcv.sb_flags |= SB_SEL; 203 } 204 205 if (events & (POLLOUT | POLLWRNORM)) { 206 selrecord(p, &so->so_snd.sb_sel); 207 so->so_snd.sb_flags |= SB_SEL; 208 } 209 } 210 211 splx(s); 212 return (revents); 213 } 214 215 int 216 soo_stat(fp, ub, p) 217 struct file *fp; 218 struct stat *ub; 219 struct proc *p; 220 { 221 struct socket *so = (struct socket *)fp->f_data; 222 223 memset((caddr_t)ub, 0, sizeof(*ub)); 224 ub->st_mode = S_IFSOCK; 225 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE, 226 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, p)); 227 } 228 229 /* ARGSUSED */ 230 int 231 soo_close(fp, p) 232 struct file *fp; 233 struct proc *p; 234 { 235 int error = 0; 236 237 if (fp->f_data) 238 error = soclose((struct socket *)fp->f_data); 239 fp->f_data = 0; 240 return (error); 241 } 242
Indexes created Mon Sep 22 13:09:51 GMT 2025