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 * $Id: sys_socket.c,v 1.4 1994/10/02 17:35:25 phk Exp $
35 */
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/proc.h>
40#include <sys/file.h>
41#include <sys/mbuf.h>
42#include <sys/protosw.h>
43#include <sys/socket.h>
44#include <sys/stat.h>
45#include <sys/socketvar.h>
46#include <sys/ioctl.h>
47#include <sys/stat.h>
48
49#include <net/if.h>
50#include <net/route.h>
51
52struct fileops socketops =
53 { soo_read, soo_write, soo_ioctl, soo_select, soo_close };
54
55/* ARGSUSED */
56int
57soo_read(fp, uio, cred)
58 struct file *fp;
59 struct uio *uio;
60 struct ucred *cred;
61{
62
63 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
64 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
65}
66
67/* ARGSUSED */
68int
69soo_write(fp, uio, cred)
70 struct file *fp;
71 struct uio *uio;
72 struct ucred *cred;
73{
74
75 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
76 uio, (struct mbuf *)0, (struct mbuf *)0, 0));
77}
78
79int
80soo_ioctl(fp, cmd, data, p)
81 struct file *fp;
82 int cmd;
83 register caddr_t data;
84 struct proc *p;
85{
86 register struct socket *so = (struct socket *)fp->f_data;
87
88 switch (cmd) {
89
90 case FIONBIO:
91 if (*(int *)data)
92 so->so_state |= SS_NBIO;
93 else
94 so->so_state &= ~SS_NBIO;
95 return (0);
96
97 case FIOASYNC:
98 if (*(int *)data) {
99 so->so_state |= SS_ASYNC;
100 so->so_rcv.sb_flags |= SB_ASYNC;
101 so->so_snd.sb_flags |= SB_ASYNC;
102 } else {
103 so->so_state &= ~SS_ASYNC;
104 so->so_rcv.sb_flags &= ~SB_ASYNC;
105 so->so_snd.sb_flags &= ~SB_ASYNC;
106 }
107 return (0);
108
109 case FIONREAD:
110 *(int *)data = so->so_rcv.sb_cc;
111 return (0);
112
113 case SIOCSPGRP:
114 so->so_pgid = *(int *)data;
115 return (0);
116
117 case SIOCGPGRP:
118 *(int *)data = so->so_pgid;
119 return (0);
120
121 case SIOCATMARK:
122 *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
123 return (0);
124 }
125 /*
126 * Interface/routing/protocol specific ioctls:
127 * interface and routing ioctls should have a
128 * different entry since a socket's unnecessary
129 */
130 if (IOCGROUP(cmd) == 'i')
131 return (ifioctl(so, cmd, data, p));
132 if (IOCGROUP(cmd) == 'r')
133 return (rtioctl(cmd, data, p));
134 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
135 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
136}
137
138int
139soo_select(fp, which, p)
140 struct file *fp;
141 int which;
142 struct proc *p;
143{
144 register struct socket *so = (struct socket *)fp->f_data;
145 register int s = splnet();
146
147 switch (which) {
148
149 case FREAD:
150 if (soreadable(so)) {
151 splx(s);
152 return (1);
153 }
154 selrecord(p, &so->so_rcv.sb_sel);
155 so->so_rcv.sb_flags |= SB_SEL;
156 break;
157
158 case FWRITE:
159 if (sowriteable(so)) {
160 splx(s);
161 return (1);
162 }
163 selrecord(p, &so->so_snd.sb_sel);
164 so->so_snd.sb_flags |= SB_SEL;
165 break;
166
167 case 0:
168 if (so->so_oobmark || (so->so_state & SS_RCVATMARK)) {
169 splx(s);
170 return (1);
171 }
172 selrecord(p, &so->so_rcv.sb_sel);
173 so->so_rcv.sb_flags |= SB_SEL;
174 break;
175 }
176 splx(s);
177 return (0);
178}
179
180int
181soo_stat(so, ub)
182 register struct socket *so;
183 register struct stat *ub;
184{
185
186 bzero((caddr_t)ub, sizeof (*ub));
187 ub->st_mode = S_IFSOCK;
188 return ((*so->so_proto->pr_usrreq)(so, PRU_SENSE,
189 (struct mbuf *)ub, (struct mbuf *)0,
190 (struct mbuf *)0));
191}
192
193/* ARGSUSED */
194int
195soo_close(fp, p)
196 struct file *fp;
197 struct proc *p;
198{
199 int error = 0;
200
201 if (fp->f_data)
202 error = soclose((struct socket *)fp->f_data);
203 fp->f_data = 0;
204 return (error);
205}