sys_socket.c revision 1549 
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 */
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/proc.h>
39#include <sys/file.h>
40#include <sys/mbuf.h>
41#include <sys/protosw.h>
42#include <sys/socket.h>
43#include <sys/socketvar.h>
44#include <sys/ioctl.h>
45#include <sys/stat.h>
46
47#include <net/if.h>
48#include <net/route.h>
49
50struct	fileops socketops =
51    { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
52
53/* ARGSUSED */
54int
55soo_read(fp, uio, cred)
56	struct file *fp;
57	struct uio *uio;
58	struct ucred *cred;
59{
60
61	return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
62		uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
63}
64
65/* ARGSUSED */
66int
67soo_write(fp, uio, cred)
68	struct file *fp;
69	struct uio *uio;
70	struct ucred *cred;
71{
72
73	return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
74		uio, (struct mbuf *)0, (struct mbuf *)0, 0));
75}
76
77int
78soo_ioctl(fp, cmd, data, p)
79	struct file *fp;
80	int cmd;
81	register caddr_t data;
82	struct proc *p;
83{
84	register struct socket *so = (struct socket *)fp->f_data;
85
86	switch (cmd) {
87
88	case FIONBIO:
89		if (*(int *)data)
90			so->so_state |= SS_NBIO;
91		else
92			so->so_state &= ~SS_NBIO;
93		return (0);
94
95	case FIOASYNC:
96		if (*(int *)data) {
97			so->so_state |= SS_ASYNC;
98			so->so_rcv.sb_flags |= SB_ASYNC;
99			so->so_snd.sb_flags |= SB_ASYNC;
100		} else {
101			so->so_state &= ~SS_ASYNC;
102			so->so_rcv.sb_flags &= ~SB_ASYNC;
103			so->so_snd.sb_flags &= ~SB_ASYNC;
104		}
105		return (0);
106
107	case FIONREAD:
108		*(int *)data = so->so_rcv.sb_cc;
109		return (0);
110
111	case SIOCSPGRP:
112		so->so_pgid = *(int *)data;
113		return (0);
114
115	case SIOCGPGRP:
116		*(int *)data = so->so_pgid;
117		return (0);
118
119	case SIOCATMARK:
120		*(int *)data = (so->so_state&SS_RCVATMARK) != 0;
121		return (0);
122	}
123	/*
124	 * Interface/routing/protocol specific ioctls:
125	 * interface and routing ioctls should have a
126	 * different entry since a socket's unnecessary
127	 */
128	if (IOCGROUP(cmd) == 'i')
129		return (ifioctl(so, cmd, data, p));
130	if (IOCGROUP(cmd) == 'r')
131		return (rtioctl(cmd, data, p));
132	return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
133	    (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
134}
135
136int
137soo_select(fp, which, p)
138	struct file *fp;
139	int which;
140	struct proc *p;
141{
142	register struct socket *so = (struct socket *)fp->f_data;
143	register int s = splnet();
144
145	switch (which) {
146
147	case FREAD:
148		if (soreadable(so)) {
149			splx(s);
150			return (1);
151		}
152		selrecord(p, &so->so_rcv.sb_sel);
153		so->so_rcv.sb_flags |= SB_SEL;
154		break;
155
156	case FWRITE:
157		if (sowriteable(so)) {
158			splx(s);
159			return (1);
160		}
161		selrecord(p, &so->so_snd.sb_sel);
162		so->so_snd.sb_flags |= SB_SEL;
163		break;
164
165	case 0:
166		if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
167			splx(s);
168			return (1);
169		}
170		selrecord(p, &so->so_rcv.sb_sel);
171		so->so_rcv.sb_flags |= SB_SEL;
172		break;
173	}
174	splx(s);
175	return (0);
176}
177
178int
179soo_stat(so, ub)
180	register struct socket *so;
181	register struct stat *ub;
182{
183
184	bzero((caddr_t)ub, sizeof (*ub));
185	ub->st_mode = S_IFSOCK;
186	return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
187	    (struct mbuf *)ub, (struct mbuf *)0,
188	    (struct mbuf *)0));
189}
190
191/* ARGSUSED */
192int
193soo_close(fp, p)
194	struct file *fp;
195	struct proc *p;
196{
197	int error = 0;
198
199	if (fp->f_data)
200		error = soclose((struct socket *)fp->f_data);
201	fp->f_data = 0;
202	return (error);
203}
204