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 * $FreeBSD$ 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/file.h> 40 #include <sys/protosw.h> 41 #include <sys/socket.h> 42 #include <sys/socketvar.h> 43 #include <sys/filio.h> /* XXX */ 44 #include <sys/sockio.h> 45 #include <sys/stat.h> 46 #include <sys/uio.h> 47 #include <sys/filedesc.h> 48 #include <sys/ucred.h> 49 50 #include <net/if.h> 51 #include <net/route.h> 52 53 struct fileops socketops = 54 { soo_read, soo_write, soo_ioctl, soo_poll, soo_stat, soo_close }; 55 56 /* ARGSUSED */ 57 int 58 soo_read(fp, uio, cred, flags, p) 59 struct file *fp; 60 struct uio *uio; 61 struct ucred *cred; 62 struct proc *p; 63 int flags; 64 { 65 struct socket *so = (struct socket *)fp->f_data; 66 return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0); 67 } 68 69 /* ARGSUSED */ 70 int 71 soo_write(fp, uio, cred, flags, p) 72 struct file *fp; 73 struct uio *uio; 74 struct ucred *cred; 75 struct proc *p; 76 int flags; 77 { 78 struct socket *so = (struct socket *)fp->f_data; 79 return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0, 80 uio->uio_procp); 81 } 82 83 int 84 soo_ioctl(fp, cmd, data, p) 85 struct file *fp; 86 u_long cmd; 87 register caddr_t data; 88 struct proc *p; 89 { 90 register struct socket *so = (struct socket *)fp->f_data; 91 92 switch (cmd) { 93 94 case FIONBIO: 95 if (*(int *)data) 96 so->so_state |= SS_NBIO; 97 else 98 so->so_state &= ~SS_NBIO; 99 return (0); 100 101 case FIOASYNC: 102 if (*(int *)data) { 103 so->so_state |= SS_ASYNC; 104 so->so_rcv.sb_flags |= SB_ASYNC; 105 so->so_snd.sb_flags |= SB_ASYNC; 106 } else { 107 so->so_state &= ~SS_ASYNC; 108 so->so_rcv.sb_flags &= ~SB_ASYNC; 109 so->so_snd.sb_flags &= ~SB_ASYNC; 110 } 111 return (0); 112 113 case FIONREAD: 114 *(int *)data = so->so_rcv.sb_cc; 115 return (0); 116 117 case FIOSETOWN: 118 return (fsetown(*(int *)data, &so->so_sigio)); 119 120 case FIOGETOWN: 121 *(int *)data = fgetown(so->so_sigio); 122 return (0); 123 124 case SIOCSPGRP: 125 return (fsetown(-(*(int *)data), &so->so_sigio)); 126 127 case SIOCGPGRP: 128 *(int *)data = -fgetown(so->so_sigio); 129 return (0); 130 131 case SIOCATMARK: 132 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 133 return (0); 134 } 135 /* 136 * Interface/routing/protocol specific ioctls: 137 * interface and routing ioctls should have a 138 * different entry since a socket's unnecessary 139 */ 140 if (IOCGROUP(cmd) == 'i') 141 return (ifioctl(so, cmd, data, p)); 142 if (IOCGROUP(cmd) == 'r') 143 return (rtioctl(cmd, data, p)); 144 return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p)); 145 } 146 147 int 148 soo_poll(fp, events, cred, p) 149 struct file *fp; 150 int events; 151 struct ucred *cred; 152 struct proc *p; 153 { 154 struct socket *so = (struct socket *)fp->f_data; 155 return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p); 156 } 157 158 int 159 soo_stat(fp, ub, p) 160 struct file *fp; 161 struct stat *ub; 162 struct proc *p; 163 { 164 struct socket *so = (struct socket *)fp->f_data; 165 166 bzero((caddr_t)ub, sizeof (*ub)); 167 ub->st_mode = S_IFSOCK; 168 /* 169 * If SS_CANTRCVMORE is set, but there's still data left in the 170 * receive buffer, the socket is still readable. 171 */ 172 if ((so->so_state & SS_CANTRCVMORE) == 0 || 173 so->so_rcv.sb_cc != 0) 174 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 175 if ((so->so_state & SS_CANTSENDMORE) == 0) 176 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 177 ub->st_size = so->so_rcv.sb_cc; 178 ub->st_uid = so->so_cred->cr_uid; 179 ub->st_gid = so->so_cred->cr_gid; 180 return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub)); 181 } 182 183 /* ARGSUSED */ 184 int 185 soo_close(fp, p) 186 struct file *fp; 187 struct proc *p; 188 { 189 int error = 0; 190 191 fp->f_ops = &badfileops; 192 if (fp->f_data) 193 error = soclose((struct socket *)fp->f_data); 194 fp->f_data = 0; 195 return (error); 196 } 197