1 /* 2 * Copyright (c) 1982, 1986, 1990, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: src/sys/kern/sys_socket.c,v 1.28.2.2 2001/02/26 04:23:16 jlemon Exp $ 35 * $DragonFly: src/sys/kern/sys_socket.c,v 1.14 2007/04/22 01:13:10 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/file.h> 41 #include <sys/lock.h> 42 #include <sys/protosw.h> 43 #include <sys/socket.h> 44 #include <sys/socketvar.h> 45 #include <sys/socketops.h> 46 #include <sys/filio.h> /* XXX */ 47 #include <sys/sockio.h> 48 #include <sys/vnode.h> 49 #include <sys/stat.h> 50 #include <sys/uio.h> 51 #include <sys/filedesc.h> 52 #include <sys/ucred.h> 53 54 #include <sys/socketvar2.h> 55 56 #include <net/if.h> 57 #include <net/route.h> 58 59 struct fileops socketops = { 60 .fo_read = soo_read, 61 .fo_write = soo_write, 62 .fo_ioctl = soo_ioctl, 63 .fo_kqfilter = sokqfilter, 64 .fo_stat = soo_stat, 65 .fo_close = soo_close, 66 .fo_shutdown = soo_shutdown 67 }; 68 69 /* 70 * MPSAFE 71 */ 72 int 73 soo_read(struct file *fp, struct uio *uio, struct ucred *cred, int fflags) 74 { 75 struct socket *so; 76 int error; 77 int msgflags; 78 79 so = (struct socket *)fp->f_data; 80 81 if (fflags & O_FBLOCKING) 82 msgflags = 0; 83 else if (fflags & O_FNONBLOCKING) 84 msgflags = MSG_FNONBLOCKING; 85 else if (fp->f_flag & FNONBLOCK) 86 msgflags = MSG_FNONBLOCKING; 87 else 88 msgflags = 0; 89 90 error = so_pru_soreceive(so, NULL, uio, NULL, NULL, &msgflags); 91 return (error); 92 } 93 94 /* 95 * MPSAFE 96 */ 97 int 98 soo_write(struct file *fp, struct uio *uio, struct ucred *cred, int fflags) 99 { 100 struct socket *so; 101 int error; 102 int msgflags; 103 104 so = (struct socket *)fp->f_data; 105 106 if (fflags & O_FBLOCKING) 107 msgflags = 0; 108 else if (fflags & O_FNONBLOCKING) 109 msgflags = MSG_FNONBLOCKING; 110 else if (fp->f_flag & FNONBLOCK) 111 msgflags = MSG_FNONBLOCKING; 112 else 113 msgflags = 0; 114 115 error = so_pru_sosend(so, NULL, uio, NULL, NULL, msgflags, uio->uio_td); 116 return (error); 117 } 118 119 /* 120 * MPSAFE 121 */ 122 int 123 soo_ioctl(struct file *fp, u_long cmd, caddr_t data, 124 struct ucred *cred, struct sysmsg *msg) 125 { 126 struct socket *so; 127 int error; 128 129 so = (struct socket *)fp->f_data; 130 131 switch (cmd) { 132 case FIOASYNC: 133 if (*(int *)data) { 134 sosetstate(so, SS_ASYNC); 135 atomic_set_int(&so->so_rcv.ssb_flags, SSB_ASYNC); 136 atomic_set_int(&so->so_snd.ssb_flags, SSB_ASYNC); 137 } else { 138 soclrstate(so, SS_ASYNC); 139 atomic_clear_int(&so->so_rcv.ssb_flags, SSB_ASYNC); 140 atomic_clear_int(&so->so_snd.ssb_flags, SSB_ASYNC); 141 } 142 error = 0; 143 break; 144 case FIONREAD: 145 *(int *)data = so->so_rcv.ssb_cc; 146 error = 0; 147 break; 148 case FIOSETOWN: 149 error = fsetown(*(int *)data, &so->so_sigio); 150 break; 151 case FIOGETOWN: 152 *(int *)data = fgetown(&so->so_sigio); 153 error = 0; 154 break; 155 case SIOCSPGRP: 156 error = fsetown(-(*(int *)data), &so->so_sigio); 157 break; 158 case SIOCGPGRP: 159 *(int *)data = -fgetown(&so->so_sigio); 160 error = 0; 161 break; 162 case SIOCATMARK: 163 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 164 error = 0; 165 break; 166 default: 167 /* 168 * Interface/routing/protocol specific ioctls: 169 * interface and routing ioctls should have a 170 * different entry since a socket's unnecessary 171 */ 172 if (IOCGROUP(cmd) == 'i') { 173 error = ifioctl(so, cmd, data, cred); 174 } else if (IOCGROUP(cmd) == 'r') { 175 error = rtioctl(cmd, data, cred); 176 } else { 177 error = so_pru_control_direct(so, cmd, data, NULL); 178 } 179 break; 180 } 181 return (error); 182 } 183 184 /* 185 * MPSAFE 186 */ 187 int 188 soo_stat(struct file *fp, struct stat *ub, struct ucred *cred) 189 { 190 struct socket *so; 191 int error; 192 193 bzero((caddr_t)ub, sizeof (*ub)); 194 ub->st_mode = S_IFSOCK; 195 so = (struct socket *)fp->f_data; 196 197 /* 198 * If SS_CANTRCVMORE is set, but there's still data left in the 199 * receive buffer, the socket is still readable. 200 */ 201 if ((so->so_state & SS_CANTRCVMORE) == 0 || 202 so->so_rcv.ssb_cc != 0) 203 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 204 if ((so->so_state & SS_CANTSENDMORE) == 0) 205 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 206 ub->st_size = so->so_rcv.ssb_cc; 207 ub->st_uid = so->so_cred->cr_uid; 208 ub->st_gid = so->so_cred->cr_gid; 209 error = so_pru_sense(so, ub); 210 return (error); 211 } 212 213 /* 214 * MPSAFE 215 */ 216 int 217 soo_close(struct file *fp) 218 { 219 int error; 220 221 fp->f_ops = &badfileops; 222 if (fp->f_data) 223 error = soclose((struct socket *)fp->f_data, fp->f_flag); 224 else 225 error = 0; 226 fp->f_data = NULL; 227 return (error); 228 } 229 230 /* 231 * MPSAFE 232 */ 233 int 234 soo_shutdown(struct file *fp, int how) 235 { 236 int error; 237 238 if (fp->f_data) 239 error = soshutdown((struct socket *)fp->f_data, how); 240 else 241 error = 0; 242 return (error); 243 } 244 245