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 1.5 2003/07/29 20:03:05 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 NULL, /* port */ 56 0, /* autoq */ 57 soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter, 58 soo_stat, soo_close 59 }; 60 61 /* ARGSUSED */ 62 int 63 soo_read( 64 struct file *fp, 65 struct uio *uio, 66 struct ucred *cred, 67 int flags, 68 struct thread *td 69 ) { 70 struct socket *so = (struct socket *)fp->f_data; 71 return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0); 72 } 73 74 /* ARGSUSED */ 75 int 76 soo_write( 77 struct file *fp, 78 struct uio *uio, 79 struct ucred *cred, 80 int flags, 81 struct thread *td 82 ) { 83 struct socket *so = (struct socket *)fp->f_data; 84 return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0, 85 uio->uio_td); 86 } 87 88 int 89 soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct thread *td) 90 { 91 struct socket *so = (struct socket *)fp->f_data; 92 93 switch (cmd) { 94 95 case FIONBIO: 96 if (*(int *)data) 97 so->so_state |= SS_NBIO; 98 else 99 so->so_state &= ~SS_NBIO; 100 return (0); 101 102 case FIOASYNC: 103 if (*(int *)data) { 104 so->so_state |= SS_ASYNC; 105 so->so_rcv.sb_flags |= SB_ASYNC; 106 so->so_snd.sb_flags |= SB_ASYNC; 107 } else { 108 so->so_state &= ~SS_ASYNC; 109 so->so_rcv.sb_flags &= ~SB_ASYNC; 110 so->so_snd.sb_flags &= ~SB_ASYNC; 111 } 112 return (0); 113 114 case FIONREAD: 115 *(int *)data = so->so_rcv.sb_cc; 116 return (0); 117 118 case FIOSETOWN: 119 return (fsetown(*(int *)data, &so->so_sigio)); 120 121 case FIOGETOWN: 122 *(int *)data = fgetown(so->so_sigio); 123 return (0); 124 125 case SIOCSPGRP: 126 return (fsetown(-(*(int *)data), &so->so_sigio)); 127 128 case SIOCGPGRP: 129 *(int *)data = -fgetown(so->so_sigio); 130 return (0); 131 132 case SIOCATMARK: 133 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 134 return (0); 135 } 136 /* 137 * Interface/routing/protocol specific ioctls: 138 * interface and routing ioctls should have a 139 * different entry since a socket's unnecessary 140 */ 141 if (IOCGROUP(cmd) == 'i') 142 return (ifioctl(so, cmd, data, td)); 143 if (IOCGROUP(cmd) == 'r') 144 return (rtioctl(cmd, data, td)); 145 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, td)); 146 } 147 148 int 149 soo_poll(struct file *fp, int events, struct ucred *cred, struct thread *td) 150 { 151 struct socket *so = (struct socket *)fp->f_data; 152 return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, td); 153 } 154 155 int 156 soo_stat(struct file *fp, struct stat *ub, struct thread *td) 157 { 158 struct socket *so = (struct socket *)fp->f_data; 159 160 bzero((caddr_t)ub, sizeof (*ub)); 161 ub->st_mode = S_IFSOCK; 162 /* 163 * If SS_CANTRCVMORE is set, but there's still data left in the 164 * receive buffer, the socket is still readable. 165 */ 166 if ((so->so_state & SS_CANTRCVMORE) == 0 || 167 so->so_rcv.sb_cc != 0) 168 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 169 if ((so->so_state & SS_CANTSENDMORE) == 0) 170 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 171 ub->st_size = so->so_rcv.sb_cc; 172 ub->st_uid = so->so_cred->cr_uid; 173 ub->st_gid = so->so_cred->cr_gid; 174 return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); 175 } 176 177 /* ARGSUSED */ 178 int 179 soo_close(struct file *fp, struct thread *td) 180 { 181 int error = 0; 182 183 fp->f_ops = &badfileops; 184 if (fp->f_data) 185 error = soclose((struct socket *)fp->f_data); 186 fp->f_data = 0; 187 return (error); 188 } 189