1 | /* $NetBSD: sys_socket.c,v 1.74 2016/07/07 06:55:43 msaitoh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Andrew Doran. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | /* |
33 | * Copyright (c) 1982, 1986, 1990, 1993 |
34 | * The Regents of the University of California. All rights reserved. |
35 | * |
36 | * Redistribution and use in source and binary forms, with or without |
37 | * modification, are permitted provided that the following conditions |
38 | * are met: |
39 | * 1. Redistributions of source code must retain the above copyright |
40 | * notice, this list of conditions and the following disclaimer. |
41 | * 2. Redistributions in binary form must reproduce the above copyright |
42 | * notice, this list of conditions and the following disclaimer in the |
43 | * documentation and/or other materials provided with the distribution. |
44 | * 3. Neither the name of the University nor the names of its contributors |
45 | * may be used to endorse or promote products derived from this software |
46 | * without specific prior written permission. |
47 | * |
48 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
49 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
51 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
54 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
55 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
56 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
57 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
58 | * SUCH DAMAGE. |
59 | * |
60 | * @(#)sys_socket.c 8.3 (Berkeley) 2/14/95 |
61 | */ |
62 | |
63 | #include <sys/cdefs.h> |
64 | __KERNEL_RCSID(0, "$NetBSD: sys_socket.c,v 1.74 2016/07/07 06:55:43 msaitoh Exp $" ); |
65 | |
66 | #include <sys/param.h> |
67 | #include <sys/systm.h> |
68 | #include <sys/systm.h> |
69 | #include <sys/file.h> |
70 | #include <sys/mbuf.h> |
71 | #include <sys/protosw.h> |
72 | #include <sys/socket.h> |
73 | #include <sys/socketvar.h> |
74 | #include <sys/ioctl.h> |
75 | #include <sys/stat.h> |
76 | #include <sys/poll.h> |
77 | #include <sys/proc.h> |
78 | #include <sys/kauth.h> |
79 | |
80 | #include <net/if.h> |
81 | #include <net/route.h> |
82 | |
83 | const struct fileops socketops = { |
84 | .fo_read = soo_read, |
85 | .fo_write = soo_write, |
86 | .fo_ioctl = soo_ioctl, |
87 | .fo_fcntl = soo_fcntl, |
88 | .fo_poll = soo_poll, |
89 | .fo_stat = soo_stat, |
90 | .fo_close = soo_close, |
91 | .fo_kqfilter = soo_kqfilter, |
92 | .fo_restart = soo_restart, |
93 | }; |
94 | |
95 | int (*ifioctl)(struct socket *, u_long, void *, struct lwp *) = (void *)eopnotsupp; |
96 | |
97 | /* ARGSUSED */ |
98 | int |
99 | soo_read(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, |
100 | int flags) |
101 | { |
102 | struct socket *so = fp->f_socket; |
103 | int error; |
104 | |
105 | error = (*so->so_receive)(so, NULL, uio, NULL, NULL, NULL); |
106 | |
107 | return error; |
108 | } |
109 | |
110 | /* ARGSUSED */ |
111 | int |
112 | soo_write(file_t *fp, off_t *offset, struct uio *uio, kauth_cred_t cred, |
113 | int flags) |
114 | { |
115 | struct socket *so = fp->f_socket; |
116 | int error; |
117 | |
118 | error = (*so->so_send)(so, NULL, uio, NULL, NULL, 0, curlwp); |
119 | |
120 | return error; |
121 | } |
122 | |
123 | int |
124 | soo_ioctl(file_t *fp, u_long cmd, void *data) |
125 | { |
126 | struct socket *so = fp->f_socket; |
127 | int error = 0; |
128 | |
129 | switch (cmd) { |
130 | |
131 | case FIONBIO: |
132 | solock(so); |
133 | if (*(int *)data) |
134 | so->so_state |= SS_NBIO; |
135 | else |
136 | so->so_state &= ~SS_NBIO; |
137 | sounlock(so); |
138 | break; |
139 | |
140 | case FIOASYNC: |
141 | solock(so); |
142 | if (*(int *)data) { |
143 | so->so_state |= SS_ASYNC; |
144 | so->so_rcv.sb_flags |= SB_ASYNC; |
145 | so->so_snd.sb_flags |= SB_ASYNC; |
146 | } else { |
147 | so->so_state &= ~SS_ASYNC; |
148 | so->so_rcv.sb_flags &= ~SB_ASYNC; |
149 | so->so_snd.sb_flags &= ~SB_ASYNC; |
150 | } |
151 | sounlock(so); |
152 | break; |
153 | |
154 | case FIONREAD: |
155 | *(int *)data = so->so_rcv.sb_cc; |
156 | break; |
157 | |
158 | case FIONWRITE: |
159 | *(int *)data = so->so_snd.sb_cc; |
160 | break; |
161 | |
162 | case FIONSPACE: |
163 | /* |
164 | * See the comment around sbspace()'s definition |
165 | * in sys/socketvar.h in face of counts about maximum |
166 | * to understand the following test. We detect overflow |
167 | * and return zero. |
168 | */ |
169 | solock(so); |
170 | if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) |
171 | || (so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt)) |
172 | *(int *)data = 0; |
173 | else |
174 | *(int *)data = sbspace(&so->so_snd); |
175 | sounlock(so); |
176 | break; |
177 | |
178 | case SIOCSPGRP: |
179 | case FIOSETOWN: |
180 | case TIOCSPGRP: |
181 | error = fsetown(&so->so_pgid, cmd, data); |
182 | break; |
183 | |
184 | case SIOCGPGRP: |
185 | case FIOGETOWN: |
186 | case TIOCGPGRP: |
187 | error = fgetown(so->so_pgid, cmd, data); |
188 | break; |
189 | |
190 | case SIOCATMARK: |
191 | *(int *)data = (so->so_state&SS_RCVATMARK) != 0; |
192 | break; |
193 | |
194 | default: |
195 | /* |
196 | * Interface/routing/protocol specific ioctls: |
197 | * interface and routing ioctls should have a |
198 | * different entry since a socket's unnecessary |
199 | */ |
200 | KERNEL_LOCK(1, NULL); |
201 | if (IOCGROUP(cmd) == 'i') |
202 | error = ifioctl(so, cmd, data, curlwp); |
203 | else { |
204 | error = (*so->so_proto->pr_usrreqs->pr_ioctl)(so, |
205 | cmd, data, NULL); |
206 | } |
207 | KERNEL_UNLOCK_ONE(NULL); |
208 | break; |
209 | } |
210 | |
211 | |
212 | return error; |
213 | } |
214 | |
215 | int |
216 | soo_fcntl(file_t *fp, u_int cmd, void *data) |
217 | { |
218 | |
219 | if (cmd == F_SETFL) |
220 | return 0; |
221 | else |
222 | return EOPNOTSUPP; |
223 | } |
224 | |
225 | int |
226 | soo_poll(file_t *fp, int events) |
227 | { |
228 | |
229 | return sopoll(fp->f_socket, events); |
230 | } |
231 | |
232 | int |
233 | soo_stat(file_t *fp, struct stat *ub) |
234 | { |
235 | struct socket *so = fp->f_socket; |
236 | int error; |
237 | |
238 | memset(ub, 0, sizeof(*ub)); |
239 | ub->st_mode = S_IFSOCK; |
240 | |
241 | solock(so); |
242 | error = (*so->so_proto->pr_usrreqs->pr_stat)(so, ub); |
243 | sounlock(so); |
244 | |
245 | return error; |
246 | } |
247 | |
248 | /* ARGSUSED */ |
249 | int |
250 | soo_close(file_t *fp) |
251 | { |
252 | int error = 0; |
253 | |
254 | if (fp->f_socket) |
255 | error = soclose(fp->f_socket); |
256 | fp->f_socket = NULL; |
257 | |
258 | return error; |
259 | } |
260 | |
261 | void |
262 | soo_restart(file_t *fp) |
263 | { |
264 | |
265 | sorestart(fp->f_socket); |
266 | } |
267 | |