sys_socket.c revision 62426 
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 62425 2000-07-02 23:56:45Z chris $
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, soo_stat, soo_close };
55
56/* ARGSUSED */
57int
58soo_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 */
70int
71soo_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
83int
84soo_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
147int
148soo_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
158int
159soo_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 */
184int
185soo_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