sys_socket.c revision 1.66
1 /* $NetBSD: sys_socket.c,v 1.66 2014/04/26 11:10:10 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 1.66 2014/04/26 11:10:10 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 /* ARGSUSED */ 96 int 97 soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 98 int flags) 99 { 100 struct socket *so = fp->f_data; 101 int error; 102 103 error = (*so->so_receive)(so, NULL, uio, NULL, NULL, NULL); 104 105 return error; 106 } 107 108 /* ARGSUSED */ 109 int 110 soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 111 int flags) 112 { 113 struct socket *so = fp->f_data; 114 int error; 115 116 error = (*so->so_send)(so, NULL, uio, NULL, NULL, 0, curlwp); 117 118 return error; 119 } 120 121 int 122 soo_ioctl(file_t *fp, u_long cmd, void *data) 123 { 124 struct socket *so = fp->f_data; 125 int error = 0; 126 127 switch (cmd) { 128 129 case FIONBIO: 130 solock(so); 131 if (*(int *)data) 132 so->so_state |= SS_NBIO; 133 else 134 so->so_state &= ~SS_NBIO; 135 sounlock(so); 136 break; 137 138 case FIOASYNC: 139 solock(so); 140 if (*(int *)data) { 141 so->so_state |= SS_ASYNC; 142 so->so_rcv.sb_flags |= SB_ASYNC; 143 so->so_snd.sb_flags |= SB_ASYNC; 144 } else { 145 so->so_state &= ~SS_ASYNC; 146 so->so_rcv.sb_flags &= ~SB_ASYNC; 147 so->so_snd.sb_flags &= ~SB_ASYNC; 148 } 149 sounlock(so); 150 break; 151 152 case FIONREAD: 153 *(int *)data = so->so_rcv.sb_cc; 154 break; 155 156 case FIONWRITE: 157 *(int *)data = so->so_snd.sb_cc; 158 break; 159 160 case FIONSPACE: 161 /* 162 * See the comment around sbspace()'s definition 163 * in sys/socketvar.h in face of counts about maximum 164 * to understand the following test. We detect overflow 165 * and return zero. 166 */ 167 solock(so); 168 if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) 169 || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) 170 *(int *)data = 0; 171 else 172 *(int *)data = sbspace(&so->so_snd); 173 sounlock(so); 174 break; 175 176 case SIOCSPGRP: 177 case FIOSETOWN: 178 case TIOCSPGRP: 179 error = fsetown(&so->so_pgid, cmd, data); 180 break; 181 182 case SIOCGPGRP: 183 case FIOGETOWN: 184 case TIOCGPGRP: 185 error = fgetown(so->so_pgid, cmd, data); 186 break; 187 188 case SIOCATMARK: 189 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 190 break; 191 192 default: 193 /* 194 * Interface/routing/protocol specific ioctls: 195 * interface and routing ioctls should have a 196 * different entry since a socket's unnecessary 197 */ 198 KERNEL_LOCK(1, NULL); 199 if (IOCGROUP(cmd) == 'i') 200 error = ifioctl(so, cmd, data, curlwp); 201 else { 202 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 203 (struct mbuf *)cmd, (struct mbuf *)data, NULL, 204 curlwp); 205 } 206 KERNEL_UNLOCK_ONE(NULL); 207 break; 208 } 209 210 211 return error; 212 } 213 214 int 215 soo_fcntl(file_t *fp, u_int cmd, void *data) 216 { 217 218 if (cmd == F_SETFL) 219 return 0; 220 else 221 return EOPNOTSUPP; 222 } 223 224 int 225 soo_poll(file_t *fp, int events) 226 { 227 228 return sopoll(fp->f_data, events); 229 } 230 231 int 232 soo_stat(file_t *fp, struct stat *ub) 233 { 234 struct socket *so = fp->f_data; 235 int error; 236 237 memset(ub, 0, sizeof(*ub)); 238 ub->st_mode = S_IFSOCK; 239 240 solock(so); 241 error = (*so->so_proto->pr_usrreq)(so, PRU_SENSE, 242 (struct mbuf *)ub, NULL, NULL, 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 } 260 261 void 262 soo_restart(file_t *fp) 263 { 264 265 sorestart(fp->f_data); 266 } 267
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