sys_socket.c revision 1.55
1 /* $NetBSD: sys_socket.c,v 1.55 2008/03/21 21:55:00 ad 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 1.55 2008/03/21 21:55:00 ad Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/systm.h> 40 #include <sys/file.h> 41 #include <sys/mbuf.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/ioctl.h> 46 #include <sys/stat.h> 47 #include <sys/poll.h> 48 #include <sys/proc.h> 49 #include <sys/kauth.h> 50 51 #include <net/if.h> 52 #include <net/route.h> 53 54 const struct fileops socketops = { 55 soo_read, soo_write, soo_ioctl, soo_fcntl, soo_poll, 56 soo_stat, soo_close, soo_kqfilter 57 }; 58 59 /* ARGSUSED */ 60 int 61 soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 62 int flags) 63 { 64 struct socket *so = fp->f_data; 65 int error; 66 67 KERNEL_LOCK(1, NULL); 68 error = (*so->so_receive)(so, (struct mbuf **)0, 69 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0); 70 KERNEL_UNLOCK_ONE(NULL); 71 72 return error; 73 } 74 75 /* ARGSUSED */ 76 int 77 soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, 78 int flags) 79 { 80 struct socket *so = fp->f_data; 81 int error; 82 83 KERNEL_LOCK(1, NULL); 84 error = (*so->so_send)(so, (struct mbuf *)0, 85 uio, (struct mbuf *)0, (struct mbuf *)0, 0, curlwp); 86 KERNEL_UNLOCK_ONE(NULL); 87 88 return error; 89 } 90 91 int 92 soo_ioctl(file_t *fp, u_long cmd, void *data) 93 { 94 struct socket *so = fp->f_data; 95 int error = 0; 96 97 if (cmd == FIONBIO) { 98 so->so_nbio = *(int *)data; 99 return 0; 100 } 101 102 KERNEL_LOCK(1, NULL); 103 104 switch (cmd) { 105 106 case FIOASYNC: 107 if (*(int *)data) { 108 so->so_state |= SS_ASYNC; 109 so->so_rcv.sb_flags |= SB_ASYNC; 110 so->so_snd.sb_flags |= SB_ASYNC; 111 } else { 112 so->so_state &= ~SS_ASYNC; 113 so->so_rcv.sb_flags &= ~SB_ASYNC; 114 so->so_snd.sb_flags &= ~SB_ASYNC; 115 } 116 break; 117 118 case FIONREAD: 119 *(int *)data = so->so_rcv.sb_cc; 120 break; 121 122 case FIONWRITE: 123 *(int *)data = so->so_snd.sb_cc; 124 break; 125 126 case FIONSPACE: 127 /* 128 * See the comment around sbspace()'s definition 129 * in sys/socketvar.h in face of counts about maximum 130 * to understand the following test. We detect overflow 131 * and return zero. 132 */ 133 if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) 134 || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) 135 *(int *)data = 0; 136 else 137 *(int *)data = sbspace(&so->so_snd); 138 break; 139 140 case SIOCSPGRP: 141 case FIOSETOWN: 142 case TIOCSPGRP: 143 error = fsetown(&so->so_pgid, cmd, data); 144 break; 145 146 case SIOCGPGRP: 147 case FIOGETOWN: 148 case TIOCGPGRP: 149 error = fgetown(so->so_pgid, cmd, data); 150 break; 151 152 case SIOCATMARK: 153 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 154 break; 155 156 default: 157 /* 158 * Interface/routing/protocol specific ioctls: 159 * interface and routing ioctls should have a 160 * different entry since a socket's unnecessary 161 */ 162 if (IOCGROUP(cmd) == 'i') 163 error = ifioctl(so, cmd, data, curlwp); 164 else if (IOCGROUP(cmd) == 'r') 165 error = rtioctl(cmd, data, curlwp); 166 else 167 error = (*so->so_proto->pr_usrreq)(so, PRU_CONTROL, 168 (struct mbuf *)cmd, (struct mbuf *)data, NULL, 169 curlwp); 170 break; 171 } 172 173 KERNEL_UNLOCK_ONE(NULL); 174 175 return error; 176 } 177 178 int 179 soo_fcntl(file_t *fp, u_int cmd, void *data) 180 { 181 182 if (cmd == F_SETFL) 183 return 0; 184 else 185 return EOPNOTSUPP; 186 } 187 188 int 189 soo_poll(file_t *fp, int events) 190 { 191 192 return sopoll(fp->f_data, events); 193 } 194 195 int 196 soo_stat(file_t *fp, struct stat *ub) 197 { 198 struct socket *so = fp->f_data; 199 int error; 200 201 memset((void *)ub, 0, sizeof(*ub)); 202 ub->st_mode = S_IFSOCK; 203 204 KERNEL_LOCK(1, NULL); 205 error = (*so->so_proto->pr_usrreq)(so, PRU_SENSE, 206 (struct mbuf *)ub, (struct mbuf *)0, (struct mbuf *)0, 207 curlwp); 208 KERNEL_UNLOCK_ONE(NULL); 209 210 return error; 211 } 212 213 /* ARGSUSED */ 214 int 215 soo_close(file_t *fp) 216 { 217 int error = 0; 218 219 KERNEL_LOCK(1, NULL); 220 if (fp->f_data) 221 error = soclose(fp->f_data); 222 fp->f_data = 0; 223 KERNEL_UNLOCK_ONE(NULL); 224 225 return error; 226 } 227
Indexes created Thu Sep 25 14:09:45 GMT 2025