2 * Copyright (c) 1982, 1986, 1990, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
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 $
38 #include <sys/param.h>
39 #include <sys/systm.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>
51 #include <sys/filedesc.h>
52 #include <sys/ucred.h>
54 #include <sys/mplock2.h>
57 #include <net/route.h>
59 struct fileops socketops = {
61 .fo_write = soo_write,
62 .fo_ioctl = soo_ioctl,
63 .fo_kqfilter = sokqfilter,
65 .fo_close = soo_close,
66 .fo_shutdown = soo_shutdown
70 * MPALMOSTSAFE - acquires mplock
73 soo_read(struct file *fp, struct uio *uio, struct ucred *cred, int fflags)
80 so = (struct socket *)fp->f_data;
82 if (fflags & O_FBLOCKING)
84 else if (fflags & O_FNONBLOCKING)
85 msgflags = MSG_FNONBLOCKING;
86 else if (fp->f_flag & FNONBLOCK)
87 msgflags = MSG_FNONBLOCKING;
91 error = so_pru_soreceive(so, NULL, uio, NULL, NULL, &msgflags);
97 * MPALMOSTSAFE - acquires mplock
100 soo_write(struct file *fp, struct uio *uio, struct ucred *cred, int fflags)
107 so = (struct socket *)fp->f_data;
109 if (fflags & O_FBLOCKING)
111 else if (fflags & O_FNONBLOCKING)
112 msgflags = MSG_FNONBLOCKING;
113 else if (fp->f_flag & FNONBLOCK)
114 msgflags = MSG_FNONBLOCKING;
118 error = so_pru_sosend(so, NULL, uio, NULL, NULL, msgflags, uio->uio_td);
124 * MPALMOSTSAFE - acquires mplock
127 soo_ioctl(struct file *fp, u_long cmd, caddr_t data,
128 struct ucred *cred, struct sysmsg *msg)
134 so = (struct socket *)fp->f_data;
139 so->so_state |= SS_ASYNC;
140 so->so_rcv.ssb_flags |= SSB_ASYNC;
141 so->so_snd.ssb_flags |= SSB_ASYNC;
143 so->so_state &= ~SS_ASYNC;
144 so->so_rcv.ssb_flags &= ~SSB_ASYNC;
145 so->so_snd.ssb_flags &= ~SSB_ASYNC;
150 *(int *)data = so->so_rcv.ssb_cc;
154 error = fsetown(*(int *)data, &so->so_sigio);
157 *(int *)data = fgetown(so->so_sigio);
161 error = fsetown(-(*(int *)data), &so->so_sigio);
164 *(int *)data = -fgetown(so->so_sigio);
168 *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
173 * Interface/routing/protocol specific ioctls:
174 * interface and routing ioctls should have a
175 * different entry since a socket's unnecessary
177 if (IOCGROUP(cmd) == 'i')
178 error = ifioctl(so, cmd, data, cred);
179 else if (IOCGROUP(cmd) == 'r')
180 error = rtioctl(cmd, data, cred);
182 error = so_pru_control(so, cmd, data, NULL);
190 * MPSAFE - acquires mplock
193 soo_stat(struct file *fp, struct stat *ub, struct ucred *cred)
198 bzero((caddr_t)ub, sizeof (*ub));
199 ub->st_mode = S_IFSOCK;
200 so = (struct socket *)fp->f_data;
203 * If SS_CANTRCVMORE is set, but there's still data left in the
204 * receive buffer, the socket is still readable.
206 if ((so->so_state & SS_CANTRCVMORE) == 0 ||
207 so->so_rcv.ssb_cc != 0)
208 ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
209 if ((so->so_state & SS_CANTSENDMORE) == 0)
210 ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
211 ub->st_size = so->so_rcv.ssb_cc;
212 ub->st_uid = so->so_cred->cr_uid;
213 ub->st_gid = so->so_cred->cr_gid;
214 error = so_pru_sense(so, ub);
219 * MPALMOSTSAFE - acquires mplock
222 soo_close(struct file *fp)
227 fp->f_ops = &badfileops;
229 error = soclose((struct socket *)fp->f_data, fp->f_flag);
238 * MPALMOSTSAFE - acquires mplock
241 soo_shutdown(struct file *fp, int how)
247 error = soshutdown((struct socket *)fp->f_data, how);