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 1.2 2003/06/17 04:28:41 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/file.h> 41 #include <sys/protosw.h> 42 #include <sys/socket.h> 43 #include <sys/socketvar.h> 44 #include <sys/filio.h> /* XXX */ 45 #include <sys/sockio.h> 46 #include <sys/stat.h> 47 #include <sys/uio.h> 48 #include <sys/filedesc.h> 49 #include <sys/ucred.h> 50 51 #include <net/if.h> 52 #include <net/route.h> 53 54 struct fileops socketops = { 55 soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter, 56 soo_stat, soo_close 57 }; 58 59 /* ARGSUSED */ 60 int 61 soo_read(fp, uio, cred, flags, p) 62 struct file *fp; 63 struct uio *uio; 64 struct ucred *cred; 65 struct proc *p; 66 int flags; 67 { 68 struct socket *so = (struct socket *)fp->f_data; 69 return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0); 70 } 71 72 /* ARGSUSED */ 73 int 74 soo_write(fp, uio, cred, flags, p) 75 struct file *fp; 76 struct uio *uio; 77 struct ucred *cred; 78 struct proc *p; 79 int flags; 80 { 81 struct socket *so = (struct socket *)fp->f_data; 82 return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0, 83 uio->uio_procp); 84 } 85 86 int 87 soo_ioctl(fp, cmd, data, p) 88 struct file *fp; 89 u_long cmd; 90 register caddr_t data; 91 struct proc *p; 92 { 93 register struct socket *so = (struct socket *)fp->f_data; 94 95 switch (cmd) { 96 97 case FIONBIO: 98 if (*(int *)data) 99 so->so_state |= SS_NBIO; 100 else 101 so->so_state &= ~SS_NBIO; 102 return (0); 103 104 case FIOASYNC: 105 if (*(int *)data) { 106 so->so_state |= SS_ASYNC; 107 so->so_rcv.sb_flags |= SB_ASYNC; 108 so->so_snd.sb_flags |= SB_ASYNC; 109 } else { 110 so->so_state &= ~SS_ASYNC; 111 so->so_rcv.sb_flags &= ~SB_ASYNC; 112 so->so_snd.sb_flags &= ~SB_ASYNC; 113 } 114 return (0); 115 116 case FIONREAD: 117 *(int *)data = so->so_rcv.sb_cc; 118 return (0); 119 120 case FIOSETOWN: 121 return (fsetown(*(int *)data, &so->so_sigio)); 122 123 case FIOGETOWN: 124 *(int *)data = fgetown(so->so_sigio); 125 return (0); 126 127 case SIOCSPGRP: 128 return (fsetown(-(*(int *)data), &so->so_sigio)); 129 130 case SIOCGPGRP: 131 *(int *)data = -fgetown(so->so_sigio); 132 return (0); 133 134 case SIOCATMARK: 135 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 136 return (0); 137 } 138 /* 139 * Interface/routing/protocol specific ioctls: 140 * interface and routing ioctls should have a 141 * different entry since a socket's unnecessary 142 */ 143 if (IOCGROUP(cmd) == 'i') 144 return (ifioctl(so, cmd, data, p)); 145 if (IOCGROUP(cmd) == 'r') 146 return (rtioctl(cmd, data, p)); 147 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p)); 148 } 149 150 int 151 soo_poll(fp, events, cred, p) 152 struct file *fp; 153 int events; 154 struct ucred *cred; 155 struct proc *p; 156 { 157 struct socket *so = (struct socket *)fp->f_data; 158 return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p); 159 } 160 161 int 162 soo_stat(fp, ub, p) 163 struct file *fp; 164 struct stat *ub; 165 struct proc *p; 166 { 167 struct socket *so = (struct socket *)fp->f_data; 168 169 bzero((caddr_t)ub, sizeof (*ub)); 170 ub->st_mode = S_IFSOCK; 171 /* 172 * If SS_CANTRCVMORE is set, but there's still data left in the 173 * receive buffer, the socket is still readable. 174 */ 175 if ((so->so_state & SS_CANTRCVMORE) == 0 || 176 so->so_rcv.sb_cc != 0) 177 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 178 if ((so->so_state & SS_CANTSENDMORE) == 0) 179 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 180 ub->st_size = so->so_rcv.sb_cc; 181 ub->st_uid = so->so_cred->cr_uid; 182 ub->st_gid = so->so_cred->cr_gid; 183 return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); 184 } 185 186 /* ARGSUSED */ 187 int 188 soo_close(fp, p) 189 struct file *fp; 190 struct proc *p; 191 { 192 int error = 0; 193 194 fp->f_ops = &badfileops; 195 if (fp->f_data) 196 error = soclose((struct socket *)fp->f_data); 197 fp->f_data = 0; 198 return (error); 199 } 200