-
-
Notifications
You must be signed in to change notification settings - Fork 602
/
sys_socket.cc
392 lines (347 loc) · 11.4 KB
/
sys_socket.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
/*-
* Copyright (c) 1982, 1986, 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)sys_socket.c 8.1 (Berkeley) 6/10/93
*/
#include <sys/cdefs.h>
#include <sys/stat.h>
#include <osv/file.h>
#include <osv/uio.h>
#include <osv/types.h>
#include <osv/ioctl.h>
#include <osv/socket.hh>
#include <osv/initialize.hh>
#include <osv/poll.h>
#include <bsd/sys/sys/libkern.h>
#include <bsd/sys/sys/param.h>
#include <bsd/sys/sys/protosw.h>
#include <bsd/sys/sys/socket.h>
#include <bsd/sys/sys/socketvar.h>
#include <bsd/sys/net/if.h>
#include <bsd/sys/net/route.h>
#include <bsd/sys/net/vnet.h>
#include <bsd/sys/netinet/in.h>
#include <bsd/sys/netinet/in_var.h>
#include <bsd/sys/netinet/in_pcb.h>
#include <bsd/sys/netinet/tcp_var.h>
#include <bsd/sys/netinet/tcp_fsm.h>
#include <mutex>
using namespace std;
extern "C" int linux_ioctl_socket(socket_file *fp, u_long cmd, void *data) ;
socket_file::socket_file(unsigned flags, socket* _so)
: file(flags, DTYPE_SOCKET, _so)
, so(_so)
{
so->fp = this;
}
socket_file::socket_file(unsigned flags, unique_ptr<socket, socket_closer>&& so)
: socket_file(flags, so.get())
{
so.release();
}
int
socket_file::read(struct uio *uio, int flags)
{
int error;
error = soreceive(so, 0, uio, 0, 0, 0);
return (error);
}
int
socket_file::write(struct uio *uio, int flags)
{
int error;
error = sosend(so, 0, uio, 0, 0, 0, 0);
#if 0
if (error == EPIPE && (so->so_options & SO_NOSIGPIPE) == 0) {
PROC_LOCK(uio->uio_td->td_proc);
tdsignal(uio->uio_td, SIGPIPE);
PROC_UNLOCK(uio->uio_td->td_proc);
}
#endif
return (error);
}
int
socket_file::truncate(off_t length)
{
return (EINVAL);
}
#define LINUX_IOCTL_IDX(ioctl) ((ioctl) - SIOCBEGIN)
#define LINUX_IOCTL_TYPE(ioctl) (linux_ioctl_type_tbl[LINUX_IOCTL_IDX(ioctl)])
static std::array<char, 256> linux_ioctl_type_tbl = initialize_array<char, 256>({
{ LINUX_IOCTL_IDX(SIOCGIFCONF) , 'i', /* get iface list */ },
{ LINUX_IOCTL_IDX(SIOCGIFFLAGS) , 'i', /* get flags */ },
{ LINUX_IOCTL_IDX(SIOCSIFFLAGS) , 'i', /* set flags */ },
{ LINUX_IOCTL_IDX(SIOCGIFADDR) , 'i', /* get PA address */ },
{ LINUX_IOCTL_IDX(SIOCSIFADDR) , 'i', /* set PA address */ },
{ LINUX_IOCTL_IDX(SIOCGIFDSTADDR) , 'i', /* get remote PA address */ },
{ LINUX_IOCTL_IDX(SIOCSIFDSTADDR) , 'i', /* set remote PA address */ },
{ LINUX_IOCTL_IDX(SIOCGIFBRDADDR) , 'i', /* get broadcast PA address */ },
{ LINUX_IOCTL_IDX(SIOCSIFBRDADDR) , 'i', /* set broadcast PA address */ },
{ LINUX_IOCTL_IDX(SIOCGIFNETMASK) , 'i', /* get network PA mask */ },
{ LINUX_IOCTL_IDX(SIOCSIFNETMASK) , 'i', /* set network PA mask */ },
{ LINUX_IOCTL_IDX(SIOCGIFMETRIC) , 'i', /* get metric */ },
{ LINUX_IOCTL_IDX(SIOCSIFMETRIC) , 'i', /* set metric */ },
{ LINUX_IOCTL_IDX(SIOCGIFMTU) , 'i', /* get MTU size */ },
{ LINUX_IOCTL_IDX(SIOCSIFMTU) , 'i', /* set MTU size */ },
{ LINUX_IOCTL_IDX(SIOCSIFNAME) , 'i', /* set interface name */ },
{ LINUX_IOCTL_IDX(SIOCGIFHWADDR) , 'i', /* set hardware address */ },
{ LINUX_IOCTL_IDX(SIOCADDMULTI) , 'i', /* Multicast address lists */ },
{ LINUX_IOCTL_IDX(SIOCDELMULTI) , 'i', },
{ LINUX_IOCTL_IDX(SIOCGIFINDEX) , 'i', /* name -> if_index mapping */ },
{ LINUX_IOCTL_IDX(SIOCDIFADDR) , 'i', /* delete PA address */ },
{ LINUX_IOCTL_IDX(SIOCGIFBR) , 'i', /* Bridging support */ },
{ LINUX_IOCTL_IDX(SIOCSIFBR) , 'i', /* Set bridging options */ },
});
static char get_ioctl_type(int ioctl)
{
if (ioctl >= SIOCBEGIN && ioctl <= SIOCEND)
return LINUX_IOCTL_TYPE(ioctl) ;
else
return _IOC_TYPE(ioctl) ;
}
int
socket_file::ioctl(u_long cmd, void *data)
{
return linux_ioctl_socket(this, cmd, data);
}
int
socket_file::bsd_ioctl(u_long cmd, void *data)
{
int error = 0;
char ioctl_type ;
switch (cmd) {
case FIONBIO:
SOCK_LOCK(so);
if (*(int *)data)
so->so_state |= SS_NBIO;
else
so->so_state &= ~SS_NBIO;
SOCK_UNLOCK(so);
break;
case FIOASYNC:
/*
* XXXRW: This code separately acquires SOCK_LOCK(so) and
* SOCKBUF_LOCK(&so->so_rcv) even though they are the same
* mutex to avoid introducing the assumption that they are
* the same.
*/
if (*(int *)data) {
SOCK_LOCK(so);
so->so_state |= SS_ASYNC;
so->so_rcv.sb_flags |= SB_ASYNC;
so->so_snd.sb_flags |= SB_ASYNC;
SOCK_UNLOCK(so);
} else {
SOCK_LOCK(so);
so->so_state &= ~SS_ASYNC;
so->so_rcv.sb_flags &= ~SB_ASYNC;
so->so_snd.sb_flags &= ~SB_ASYNC;
SOCK_UNLOCK(so);
}
break;
case FIONREAD:
/* Unlocked read. */
*(int *)data = so->so_rcv.sb_cc;
break;
case TIOCOUTQ:
/*
* Check the so_type here because we want so to be a TCP socket.
* To ensure that we can get tcpcb and state correctly
*/
if (so->so_type == SOCK_STREAM) {
struct inpcb *inp = sotoinpcb(so);
struct tcpcb *tp = intotcpcb(inp);
if (tp->get_state() == TCPS_LISTEN) {
error = EINVAL;
break;
}
}
/* fall through */
case FIONWRITE:
/* Unlocked read. */
*(int *)data = so->so_snd.sb_cc;
break;
case FIONSPACE:
if ((so->so_snd.sb_hiwat < so->so_snd.sb_cc) ||
(so->so_snd.sb_mbmax < so->so_snd.sb_mbcnt))
*(int *)data = 0;
else
*(int *)data = sbspace(&so->so_snd);
break;
case SIOCATMARK:
/* Unlocked read. */
*(int *)data = (so->so_rcv.sb_state & SBS_RCVATMARK) != 0;
break;
default:
/*
* Interface/routing/protocol specific ioctls: interface and
* routing ioctls should have a different entry since a
* socket is unnecessary.
*/
ioctl_type = get_ioctl_type(cmd) ;
if (ioctl_type == 'i')
error = ifioctl(so, cmd, (caddr_t)data, 0);
else if (ioctl_type == 'r') {
CURVNET_SET(so->so_vnet);
error = rtioctl_fib(cmd, (caddr_t)data, so->so_fibnum);
CURVNET_RESTORE();
} else if (ioctl_type == '\0') {
error = ENOTTY ; /* An unsupported Linux ioctl */
} else {
CURVNET_SET(so->so_vnet);
error = ((*so->so_proto->pr_usrreqs->pru_control)
(so, cmd, (caddr_t)data, 0, 0));
CURVNET_RESTORE();
}
break;
}
return (error);
}
int
socket_file::poll(int events)
{
SOCK_LOCK(so);
if (so->so_nc) {
so->so_nc->process_queue();
}
SOCK_UNLOCK(so);
return (sopoll(so, events, 0, 0));
}
int
socket_file::poll_sync(struct pollfd& pfd, timeout_t timeout)
{
constexpr auto supported_events = POLLIN | POLLRDNORM;
if ((pfd.events & POLL_REQUESTABLE) & ~supported_events) {
return poll_many(&pfd, 1, timeout);
}
std::unique_lock<::mutex> guard(SOCK_MTX_REF(so));
if (!(so->so_state & SS_ISCONNECTED)) {
guard.unlock();
return poll_many(&pfd, 1, timeout);
}
if (so->so_nc) {
so->so_nc->process_queue();
}
int revents = sopoll_generic_locked(so, pfd.events);
while (!revents) {
if (!timeout || sbwait_tmo(so, &so->so_rcv, timeout)) {
pfd.revents = 0;
return 0;
}
revents = sopoll_generic_locked(so, pfd.events);
}
pfd.revents = revents;
return !!revents;
}
void socket_file::epoll_add(epoll_ptr ep)
{
SOCK_LOCK(so);
file::epoll_add(ep);
assert(!f_lock.owned());
so->so_rcv.sb_flags |= SB_SEL;
so->so_snd.sb_flags |= SB_SEL;
WITH_LOCK(f_lock) {
if (so->so_nc) {
so->so_nc->add_epoll(ep);
}
}
SOCK_UNLOCK(so);
}
void socket_file::epoll_del(epoll_ptr ep)
{
SOCK_LOCK(so);
assert(!f_lock.owned());
file::epoll_del(ep);
WITH_LOCK(f_lock) {
if (so->so_nc) {
so->so_nc->del_epoll(ep);
}
}
SOCK_UNLOCK(so);
}
void
socket_file::poll_install(pollreq& pr)
{
SOCK_LOCK(so);
if (so->so_nc) {
so->so_nc->add_poller(pr);
}
SOCK_UNLOCK(so);
}
void
socket_file::poll_uninstall(pollreq& pr)
{
SOCK_LOCK(so);
if (so->so_nc) {
so->so_nc->del_poller(pr);
}
SOCK_UNLOCK(so);
}
int
socket_file::stat(struct stat *ub)
{
bzero((caddr_t)ub, sizeof (*ub));
ub->st_mode = S_IFSOCK;
/*
* If SBS_CANTRCVMORE is set, but there's still data left in the
* receive buffer, the socket is still readable.
*/
SOCK_LOCK(so);
if ((so->so_rcv.sb_state & SBS_CANTRCVMORE) == 0 ||
so->so_rcv.sb_cc != 0)
ub->st_mode |= S_IRUSR | S_IRGRP | S_IROTH;
ub->st_size = so->so_rcv.sb_cc - so->so_rcv.sb_ctl;
SOCK_UNLOCK(so);
/* Unlocked read. */
if ((so->so_snd.sb_state & SBS_CANTSENDMORE) == 0)
ub->st_mode |= S_IWUSR | S_IWGRP | S_IWOTH;
ub->st_uid = 0;
ub->st_gid = 0;
return (*so->so_proto->pr_usrreqs->pru_sense)(so, ub);
}
/*
* API socket close on file pointer. We call soclose() to close the socket
* (including initiating closing protocols). soclose() will sorele() the
* file reference but the actual socket will not go away until the socket's
* ref count hits 0.
*/
/* ARGSUSED */
int
socket_file::close()
{
int error = 0;
if (so)
error = soclose(so);
return (error);
}
int socket_file::chmod(mode_t mode)
{
// Posix specifies that EINVAL should be returned when trying to do
// fchmod() on a pipe, which doesn't support fchmod().
return EINVAL;
}