sys_socket.c revision 1.67
1 /* $NetBSD: sys_socket.c,v 1.67 2014/04/26 11:16:22 pooka Exp $ */ 2 3 /*- 4 * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1982, 1986, 1990, 1993 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)sys_socket.c 8.3 (Berkeley) 2/14/95 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.67 2014/04/26 11:16:22 pooka Exp $"); 65 66 #include <sys/param.h> 67 #include <sys/systm.h> 68 #include <sys/systm.h> 69 #include <sys/file.h> 70 #include <sys/mbuf.h> 71 #include <sys/protosw.h> 72 #include <sys/socket.h> 73 #include <sys/socketvar.h> 74 #include <sys/ioctl.h> 75 #include <sys/stat.h> 76 #include <sys/poll.h> 77 #include <sys/proc.h> 78 #include <sys/kauth.h> 79 80 #include <net/if.h> 81 #include <net/route.h> 82 83 const struct fileops socketops = { 84 .fo_read = soo_read, 85 .fo_write = soo_write, 86 .fo_ioctl = soo_ioctl, 87 .fo_fcntl = soo_fcntl, 88 .fo_poll = soo_poll, 89 .fo_stat = soo_stat, 90 .fo_close = soo_close, 91 .fo_kqfilter = soo_kqfilter, 92 .fo_restart = soo_restart, 93 }; 94 95 int (*ifioctl)(struct socket *, u_long, void *, struct lwp *) = (void *)eopnotsupp; 96 97 /* ARGSUSED */ 98 int 99 soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 100 int flags) 101 { 102 struct socket *so = fp->f_data; 103 int error; 104 105 error = (*so->so_receive)(so, NULL, uio, NULL, NULL, NULL); 106 107 return error; 108 } 109 110 /* ARGSUSED */ 111 int 112 soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 113 int flags) 114 { 115 struct socket *so = fp->f_data; 116 int error; 117 118 error = (*so->so_send)(so, NULL, uio, NULL, NULL, 0, curlwp); 119 120 return error; 121 } 122 123 int 124 soo_ioctl(file_t *fp, u_long cmd, void *data) 125 { 126 struct socket *so = fp->f_data; 127 int error = 0; 128 129 switch (cmd) { 130 131 case FIONBIO: 132 solock(so); 133 if (*(int *)data) 134 so->so_state |= SS_NBIO; 135 else 136 so->so_state &= ~SS_NBIO; 137 sounlock(so); 138 break; 139 140 case FIOASYNC: 141 solock(so); 142 if (*(int *)data) { 143 so->so_state |= SS_ASYNC; 144 so->so_rcv.sb_flags |= SB_ASYNC; 145 so->so_snd.sb_flags |= SB_ASYNC; 146 } else { 147 so->so_state &= ~SS_ASYNC; 148 so->so_rcv.sb_flags &= ~SB_ASYNC; 149 so->so_snd.sb_flags &= ~SB_ASYNC; 150 } 151 sounlock(so); 152 break; 153 154 case FIONREAD: 155 *(int *)data = so->so_rcv.sb_cc; 156 break; 157 158 case FIONWRITE: 159 *(int *)data = so->so_snd.sb_cc; 160 break; 161 162 case FIONSPACE: 163 /* 164 * See the comment around sbspace()'s definition 165 * in sys/socketvar.h in face of counts about maximum 166 * to understand the following test. We detect overflow 167 * and return zero. 168 */ 169 solock(so); 170 if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) 171 || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) 172 *(int *)data = 0; 173 else 174 *(int *)data = sbspace(&so->so_snd); 175 sounlock(so); 176 break; 177 178 case SIOCSPGRP: 179 case FIOSETOWN: 180 case TIOCSPGRP: 181 error = fsetown(&so->so_pgid, cmd, data); 182 break; 183 184 case SIOCGPGRP: 185 case FIOGETOWN: 186 case TIOCGPGRP: 187 error = fgetown(so->so_pgid, cmd, data); 188 break; 189 190 case SIOCATMARK: 191 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 192 break; 193 194 default: 195 /* 196 * Interface/routing/protocol specific ioctls: 197 * interface and routing ioctls should have a 198 * different entry since a socket's unnecessary 199 */ 200 KERNEL_LOCK(1, NULL); 201 if (IOCGROUP(cmd) == 'i') 202 error = ifioctl(so, cmd, data, curlwp); 203 else { 204 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 205 (struct mbuf *)cmd, (struct mbuf *)data, NULL, 206 curlwp); 207 } 208 KERNEL_UNLOCK_ONE(NULL); 209 break; 210 } 211 212 213 return error; 214 } 215 216 int 217 soo_fcntl(file_t *fp, u_int cmd, void *data) 218 { 219 220 if (cmd == F_SETFL) 221 return 0; 222 else 223 return EOPNOTSUPP; 224 } 225 226 int 227 soo_poll(file_t *fp, int events) 228 { 229 230 return sopoll(fp->f_data, events); 231 } 232 233 int 234 soo_stat(file_t *fp, struct stat *ub) 235 { 236 struct socket *so = fp->f_data; 237 int error; 238 239 memset(ub, 0, sizeof(*ub)); 240 ub->st_mode = S_IFSOCK; 241 242 solock(so); 243 error = (*so->so_proto->pr_usrreq)(so, PRU_SENSE, 244 (struct mbuf *)ub, NULL, NULL, curlwp); 245 sounlock(so); 246 247 return error; 248 } 249 250 /* ARGSUSED */ 251 int 252 soo_close(file_t *fp) 253 { 254 int error = 0; 255 256 if (fp->f_data) 257 error = soclose(fp->f_data); 258 fp->f_data = 0; 259 260 return error; 261 } 262 263 void 264 soo_restart(file_t *fp) 265 { 266 267 sorestart(fp->f_data); 268 } 269
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