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 1.8 2005/07/13 01:38:50 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/socketops.h> 45 #include <sys/filio.h> /* XXX */ 46 #include <sys/sockio.h> 47 #include <sys/stat.h> 48 #include <sys/uio.h> 49 #include <sys/filedesc.h> 50 #include <sys/ucred.h> 51 52 #include <net/if.h> 53 #include <net/route.h> 54 55 struct fileops socketops = { 56 NULL, /* port */ 57 NULL, /* clone */ 58 soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter, 59 soo_stat, soo_close, soo_shutdown 60 }; 61 62 /* ARGSUSED */ 63 int 64 soo_read(struct file *fp, struct uio *uio, struct ucred *cred, int flags, 65 struct thread *td) 66 { 67 struct socket *so = (struct socket *)fp->f_data; 68 69 return (so_pru_soreceive(so, NULL, uio, NULL, NULL, NULL)); 70 } 71 72 /* ARGSUSED */ 73 int 74 soo_write(struct file *fp, struct uio *uio, struct ucred *cred, int flags, 75 struct thread *td) 76 { 77 struct socket *so = (struct socket *)fp->f_data; 78 79 return (so_pru_sosend(so, NULL, uio, NULL, NULL, 0, uio->uio_td)); 80 } 81 82 int 83 soo_ioctl(struct file *fp, u_long cmd, caddr_t data, struct thread *td) 84 { 85 struct socket *so = (struct socket *)fp->f_data; 86 87 switch (cmd) { 88 89 case FIONBIO: 90 if (*(int *)data) 91 so->so_state |= SS_NBIO; 92 else 93 so->so_state &= ~SS_NBIO; 94 return (0); 95 96 case FIOASYNC: 97 if (*(int *)data) { 98 so->so_state |= SS_ASYNC; 99 so->so_rcv.sb_flags |= SB_ASYNC; 100 so->so_snd.sb_flags |= SB_ASYNC; 101 } else { 102 so->so_state &= ~SS_ASYNC; 103 so->so_rcv.sb_flags &= ~SB_ASYNC; 104 so->so_snd.sb_flags &= ~SB_ASYNC; 105 } 106 return (0); 107 108 case FIONREAD: 109 *(int *)data = so->so_rcv.sb_cc; 110 return (0); 111 112 case FIOSETOWN: 113 return (fsetown(*(int *)data, &so->so_sigio)); 114 115 case FIOGETOWN: 116 *(int *)data = fgetown(so->so_sigio); 117 return (0); 118 119 case SIOCSPGRP: 120 return (fsetown(-(*(int *)data), &so->so_sigio)); 121 122 case SIOCGPGRP: 123 *(int *)data = -fgetown(so->so_sigio); 124 return (0); 125 126 case SIOCATMARK: 127 *(int *)data = (so->so_state&SS_RCVATMARK) != 0; 128 return (0); 129 } 130 /* 131 * Interface/routing/protocol specific ioctls: 132 * interface and routing ioctls should have a 133 * different entry since a socket's unnecessary 134 */ 135 if (IOCGROUP(cmd) == 'i') 136 return (ifioctl(so, cmd, data, td)); 137 if (IOCGROUP(cmd) == 'r') 138 return (rtioctl(cmd, data, td)); 139 return (so_pru_control(so, cmd, data, NULL, td)); 140 } 141 142 int 143 soo_poll(struct file *fp, int events, struct ucred *cred, struct thread *td) 144 { 145 struct socket *so = (struct socket *)fp->f_data; 146 return (so_pru_sopoll(so, events, cred, td)); 147 } 148 149 int 150 soo_stat(struct file *fp, struct stat *ub, struct thread *td) 151 { 152 struct socket *so = (struct socket *)fp->f_data; 153 154 bzero((caddr_t)ub, sizeof (*ub)); 155 ub->st_mode = S_IFSOCK; 156 /* 157 * If SS_CANTRCVMORE is set, but there's still data left in the 158 * receive buffer, the socket is still readable. 159 */ 160 if ((so->so_state & SS_CANTRCVMORE) == 0 || 161 so->so_rcv.sb_cc != 0) 162 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH; 163 if ((so->so_state & SS_CANTSENDMORE) == 0) 164 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH; 165 ub->st_size = so->so_rcv.sb_cc; 166 ub->st_uid = so->so_cred->cr_uid; 167 ub->st_gid = so->so_cred->cr_gid; 168 return (so_pru_sense(so, ub)); 169 } 170 171 /* ARGSUSED */ 172 int 173 soo_close(struct file *fp, struct thread *td) 174 { 175 int error = 0; 176 177 fp->f_ops = &badfileops; 178 if (fp->f_data) 179 error = soclose((struct socket *)fp->f_data); 180 fp->f_data = 0; 181 return (error); 182 } 183 184 /* ARGSUSED */ 185 int 186 soo_shutdown(struct file *fp, int how, struct thread *td) 187 { 188 int error = 0; 189 190 if (fp->f_data) 191 error = soshutdown((struct socket *)fp->f_data, how); 192 return (error); 193 } 194 195