Initial import from FreeBSD RELENG_4:
[dragonfly.git] / sys / kern / sys_socket.c
CommitLineData
984263bc
MD
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: src/sys/kern/sys_socket.c,v 1.28.2.2 2001/02/26 04:23:16 jlemon Exp $
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, p));
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}