sys_socket.c revision 1.56
1 /* $NetBSD: sys_socket.c,v 1.56 2008/04/24 11:38:36 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * 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. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Copyright (c) 1982, 1986, 1990, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)sys_socket.c 8.3 (Berkeley) 2/14/95 65 */ 66 67 #include <sys/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.56 2008/04/24 11:38:36 ad Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/systm.h> 73 #include <sys/file.h> 74 #include <sys/mbuf.h> 75 #include <sys/protosw.h> 76 #include <sys/socket.h> 77 #include <sys/socketvar.h> 78 #include <sys/ioctl.h> 79 #include <sys/stat.h> 80 #include <sys/poll.h> 81 #include <sys/proc.h> 82 #include <sys/kauth.h> 83 84 #include <net/if.h> 85 #include <net/route.h> 86 87 const struct fileops socketops = { 88 soo_read, soo_write, soo_ioctl, soo_fcntl, soo_poll, 89 soo_stat, soo_close, soo_kqfilter 90 }; 91 92 /* ARGSUSED */ 93 int 94 soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 95 int flags) 96 { 97 struct socket *so = fp->f_data; 98 int error; 99 100 error = (*so->so_receive)(so, (struct mbuf **)0, 101 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0); 102 103 return error; 104 } 105 106 /* ARGSUSED */ 107 int 108 soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 109 int flags) 110 { 111 struct socket *so = fp->f_data; 112 int error; 113 114 error = (*so->so_send)(so, (struct mbuf *)0, 115 uio, (struct mbuf *)0, (struct mbuf *)0, 0, curlwp); 116 117 return error; 118 } 119 120 int 121 soo_ioctl(file_t *fp, u_long cmd, void *data) 122 { 123 struct socket *so = fp->f_data; 124 int error = 0; 125 126 if (cmd == FIONBIO) { 127 so->so_nbio = *(int *)data; 128 return 0; 129 } 130 131 switch (cmd) { 132 133 case FIOASYNC: 134 solock(so); 135 if (*(int *)data) { 136 so->so_state |= SS_ASYNC; 137 so->so_rcv.sb_flags |= SB_ASYNC; 138 so->so_snd.sb_flags |= SB_ASYNC; 139 } else { 140 so->so_state &= ~SS_ASYNC; 141 so->so_rcv.sb_flags &= ~SB_ASYNC; 142 so->so_snd.sb_flags &= ~SB_ASYNC; 143 } 144 sounlock(so); 145 break; 146 147 case FIONREAD: 148 *(int *)data = so->so_rcv.sb_cc; 149 break; 150 151 case FIONWRITE: 152 *(int *)data = so->so_snd.sb_cc; 153 break; 154 155 case FIONSPACE: 156 /* 157 * See the comment around sbspace()'s definition 158 * in sys/socketvar.h in face of counts about maximum 159 * to understand the following test. We detect overflow 160 * and return zero. 161 */ 162 solock(so); 163 if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) 164 || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) 165 *(int *)data = 0; 166 else 167 *(int *)data = sbspace(&so->so_snd); 168 sounlock(so); 169 break; 170 171 case SIOCSPGRP: 172 case FIOSETOWN: 173 case TIOCSPGRP: 174 error = fsetown(&so->so_pgid, cmd, data); 175 break; 176 177 case SIOCGPGRP: 178 case FIOGETOWN: 179 case TIOCGPGRP: 180 error = fgetown(so->so_pgid, cmd, data); 181 break; 182 183 case SIOCATMARK: 184 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 185 break; 186 187 default: 188 /* 189 * Interface/routing/protocol specific ioctls: 190 * interface and routing ioctls should have a 191 * different entry since a socket's unnecessary 192 */ 193 KERNEL_LOCK(1, NULL); 194 if (IOCGROUP(cmd) == 'i') 195 error = ifioctl(so, cmd, data, curlwp); 196 else if (IOCGROUP(cmd) == 'r') 197 error = rtioctl(cmd, data, curlwp); 198 else { 199 solock(so); 200 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 201 (struct mbuf *)cmd, (struct mbuf *)data, NULL, 202 curlwp); 203 sounlock(so); 204 } 205 KERNEL_UNLOCK_ONE(NULL); 206 break; 207 } 208 209 210 return error; 211 } 212 213 int 214 soo_fcntl(file_t *fp, u_int cmd, void *data) 215 { 216 217 if (cmd == F_SETFL) 218 return 0; 219 else 220 return EOPNOTSUPP; 221 } 222 223 int 224 soo_poll(file_t *fp, int events) 225 { 226 227 return sopoll(fp->f_data, events); 228 } 229 230 int 231 soo_stat(file_t *fp, struct stat *ub) 232 { 233 struct socket *so = fp->f_data; 234 int error; 235 236 memset((void *)ub, 0, sizeof(*ub)); 237 ub->st_mode = S_IFSOCK; 238 239 solock(so); 240 error = (*so->so_proto->pr_usrreq)(so, PRU_SENSE, 241 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, 242 curlwp); 243 sounlock(so); 244 245 return error; 246 } 247 248 /* ARGSUSED */ 249 int 250 soo_close(file_t *fp) 251 { 252 int error = 0; 253 254 if (fp->f_data) 255 error = soclose(fp->f_data); 256 fp->f_data = 0; 257 258 return error; 259 } 260
Indexes created Tue Sep 23 07:09:52 GMT 2025