1 /* $OpenBSD: sys_socket.c,v 1.9 2003/09/23 16:51:12 millert Exp $ */
2 /* $NetBSD: sys_socket.c,v 1.13 1995/08/12 23:59:09 mycroft Exp $ */
3
4 /*
5 * Copyright (c) 1982, 1986, 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
33 */
34
35 #include <sys/param.h>
36 #include <sys/systm.h>
37 #include <sys/file.h>
38 #include <sys/proc.h>
39 #include <sys/mbuf.h>
40 #include <sys/protosw.h>
41 #include <sys/socket.h>
42 #include <sys/socketvar.h>
43 #include <sys/ioctl.h>
44 #include <sys/poll.h>
45 #include <sys/stat.h>
46
47 #include <net/if.h>
48 #include <net/route.h>
49
50 struct fileops socketops = {
51 soo_read, soo_write, soo_ioctl, soo_poll, soo_kqfilter,
52 soo_stat, soo_close
53 };
54
55 /* ARGSUSED */
56 int
soo_read(fp,poff,uio,cred)57 soo_read(fp, poff, uio, cred)
58 struct file *fp;
59 off_t *poff;
60 struct uio *uio;
61 struct ucred *cred;
62 {
63
64 return (soreceive((struct socket *)fp->f_data, (struct mbuf **)0,
65 uio, (struct mbuf **)0, (struct mbuf **)0, (int *)0));
66 }
67
68 /* ARGSUSED */
69 int
soo_write(fp,poff,uio,cred)70 soo_write(fp, poff, uio, cred)
71 struct file *fp;
72 off_t *poff;
73 struct uio *uio;
74 struct ucred *cred;
75 {
76
77 return (sosend((struct socket *)fp->f_data, (struct mbuf *)0,
78 uio, (struct mbuf *)0, (struct mbuf *)0, 0));
79 }
80
81 int
soo_ioctl(fp,cmd,data,p)82 soo_ioctl(fp, cmd, data, p)
83 struct file *fp;
84 u_long cmd;
85 register caddr_t data;
86 struct proc *p;
87 {
88 register struct socket *so = (struct socket *)fp->f_data;
89
90 switch (cmd) {
91
92 case FIONBIO:
93 if (*(int *)data)
94 so->so_state |= SS_NBIO;
95 else
96 so->so_state &= ~SS_NBIO;
97 return (0);
98
99 case FIOASYNC:
100 if (*(int *)data) {
101 so->so_state |= SS_ASYNC;
102 so->so_rcv.sb_flags |= SB_ASYNC;
103 so->so_snd.sb_flags |= SB_ASYNC;
104 } else {
105 so->so_state &= ~SS_ASYNC;
106 so->so_rcv.sb_flags &= ~SB_ASYNC;
107 so->so_snd.sb_flags &= ~SB_ASYNC;
108 }
109 return (0);
110
111 case FIONREAD:
112 *(int *)data = so->so_rcv.sb_cc;
113 return (0);
114
115 case SIOCSPGRP:
116 so->so_pgid = *(int *)data;
117 so->so_siguid = p->p_cred->p_ruid;
118 so->so_sigeuid = p->p_ucred->cr_uid;
119 return (0);
120
121 case SIOCGPGRP:
122 *(int *)data = so->so_pgid;
123 return (0);
124
125 case SIOCATMARK:
126 *(int *)data = (so->so_state&SS_RCVATMARK) != 0;
127 return (0);
128 }
129 /*
130 * Interface/routing/protocol specific ioctls:
131 * interface and routing ioctls should have a
132 * different entry since a socket's unnecessary
133 */
134 if (IOCGROUP(cmd) == 'i')
135 return (ifioctl(so, cmd, data, p));
136 if (IOCGROUP(cmd) == 'r')
137 return (rtioctl(cmd, data, p));
138 return ((*so->so_proto->pr_usrreq)(so, PRU_CONTROL,
139 (struct mbuf *)cmd, (struct mbuf *)data, (struct mbuf *)0));
140 }
141
142 int
soo_poll(fp,events,p)143 soo_poll(fp, events, p)
144 struct file *fp;
145 int events;
146 struct proc *p;
147 {
148 struct socket *so = (struct socket *)fp->f_data;
149 int revents = 0;
150 int s = splsoftnet();
151
152 if (events & (POLLIN | POLLRDNORM)) {
153 if (soreadable(so))
154 revents |= events & (POLLIN | POLLRDNORM);
155 }
156 if (events & (POLLOUT | POLLWRNORM)) {
157 if (sowriteable(so))
158 revents |= events & (POLLOUT | POLLWRNORM);
159 }
160 if (events & (POLLPRI | POLLRDBAND)) {
161 if (so->so_oobmark || (so->so_state & SS_RCVATMARK))
162 revents |= events & (POLLPRI | POLLRDBAND);
163 }
164 if (revents == 0) {
165 if (events & (POLLIN | POLLPRI | POLLRDNORM | POLLRDBAND)) {
166 selrecord(p, &so->so_rcv.sb_sel);
167 so->so_rcv.sb_flags |= SB_SEL;
168 }
169 if (events & (POLLOUT | POLLWRNORM)) {
170 selrecord(p, &so->so_snd.sb_sel);
171 so->so_snd.sb_flags |= SB_SEL;
172 }
173 }
174 splx(s);
175 return (revents);
176 }
177
178 int
soo_stat(fp,ub,p)179 soo_stat(fp, ub, p)
180 struct file *fp;
181 struct stat *ub;
182 struct proc *p;
183 {
184 struct socket *so = (struct socket *)fp->f_data;
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 */
194 int
soo_close(fp,p)195 soo_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 }
206