sys_socket.c revision 80353 
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: head/sys/kern/sys_socket.c 80353 2001-07-25 20:15:28Z fenner $
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
53struct	fileops socketops = {
54	soo_read, soo_write, soo_ioctl, soo_poll, sokqfilter,
55	soo_stat, soo_close
56};
57
58/* ARGSUSED */
59int
60soo_read(fp, uio, cred, flags, p)
61	struct file *fp;
62	struct uio *uio;
63	struct ucred *cred;
64	struct proc *p;
65	int flags;
66{
67	struct socket *so = (struct socket *)fp->f_data;
68	return so->so_proto->pr_usrreqs->pru_soreceive(so, 0, uio, 0, 0, 0);
69}
70
71/* ARGSUSED */
72int
73soo_write(fp, uio, cred, flags, p)
74	struct file *fp;
75	struct uio *uio;
76	struct ucred *cred;
77	struct proc *p;
78	int flags;
79{
80	struct socket *so = (struct socket *)fp->f_data;
81	return so->so_proto->pr_usrreqs->pru_sosend(so, 0, uio, 0, 0, 0,
82						    uio->uio_procp);
83}
84
85int
86soo_ioctl(fp, cmd, data, p)
87	struct file *fp;
88	u_long cmd;
89	register caddr_t data;
90	struct proc *p;
91{
92	register struct socket *so = (struct socket *)fp->f_data;
93
94	switch (cmd) {
95
96	case FIONBIO:
97		if (*(int *)data)
98			so->so_state |= SS_NBIO;
99		else
100			so->so_state &= ~SS_NBIO;
101		return (0);
102
103	case FIOASYNC:
104		if (*(int *)data) {
105			so->so_state |= SS_ASYNC;
106			so->so_rcv.sb_flags |= SB_ASYNC;
107			so->so_snd.sb_flags |= SB_ASYNC;
108		} else {
109			so->so_state &= ~SS_ASYNC;
110			so->so_rcv.sb_flags &= ~SB_ASYNC;
111			so->so_snd.sb_flags &= ~SB_ASYNC;
112		}
113		return (0);
114
115	case FIONREAD:
116		*(int *)data = so->so_rcv.sb_cc;
117		return (0);
118
119	case FIOSETOWN:
120		return (fsetown(*(int *)data, &so->so_sigio));
121
122	case FIOGETOWN:
123		*(int *)data = fgetown(so->so_sigio);
124		return (0);
125
126	case SIOCSPGRP:
127		return (fsetown(-(*(int *)data), &so->so_sigio));
128
129	case SIOCGPGRP:
130		*(int *)data = -fgetown(so->so_sigio);
131		return (0);
132
133	case SIOCATMARK:
134		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
135		return (0);
136	}
137	/*
138	 * Interface/routing/protocol specific ioctls:
139	 * interface and routing ioctls should have a
140	 * different entry since a socket's unnecessary
141	 */
142	if (IOCGROUP(cmd) == 'i')
143		return (ifioctl(so, cmd, data, p));
144	if (IOCGROUP(cmd) == 'r')
145		return (rtioctl(cmd, data));
146	return ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 0, p));
147}
148
149int
150soo_poll(fp, events, cred, p)
151	struct file *fp;
152	int events;
153	struct ucred *cred;
154	struct proc *p;
155{
156	struct socket *so = (struct socket *)fp->f_data;
157	return so->so_proto->pr_usrreqs->pru_sopoll(so, events, cred, p);
158}
159
160int
161soo_stat(fp, ub, p)
162	struct file *fp;
163	struct stat *ub;
164	struct proc *p;
165{
166	struct socket *so = (struct socket *)fp->f_data;
167
168	bzero((caddr_t)ub, sizeof (*ub));
169	ub->st_mode = S_IFSOCK;
170	/*
171	 * If SS_CANTRCVMORE is set, but there's still data left in the
172	 * receive buffer, the socket is still readable.
173	 */
174	if ((so->so_state & SS_CANTRCVMORE) == 0 ||
175	    so->so_rcv.sb_cc != 0)
176		ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
177	if ((so->so_state & SS_CANTSENDMORE) == 0)
178		ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
179	ub->st_size = so->so_rcv.sb_cc;
180	ub->st_uid = so->so_cred->cr_uid;
181	ub->st_gid = so->so_cred->cr_gid;
182	return ((*so->so_proto->pr_usrreqs->pru_sense)(so, ub));
183}
184
185/* ARGSUSED */
186int
187soo_close(fp, p)
188	struct file *fp;
189	struct proc *p;
190{
191	int error = 0;
192
193	fp->f_ops = &badfileops;
194	if (fp->f_data)
195		error = soclose((struct socket *)fp->f_data);
196	fp->f_data = 0;
197	return (error);
198}
199