-
Notifications
You must be signed in to change notification settings - Fork 797
/
TestHook.cc
504 lines (444 loc) · 12.8 KB
/
TestHook.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
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
/** @file
A brief file description
@section license License
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements. See the NOTICE file
distributed with this work for additional information
regarding copyright ownership. The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
/****************************************************************************
TestHook.cc
****************************************************************************/
#include "ink_config.h"
#include "ink_unused.h"
#include <limits.h>
#include "P_Net.h"
#include "ParseRules.h"
#include "EventName.h"
volatile int state_machine_count = 0;
struct Globals
{
int accept_port;
int accept_count;
int accept_spawn;
int buffer_size;
int default_body_size;
void get_env_int(int *var, const char *env)
{
char *s = getenv(env);
if (s)
*var = atoi(s);
}
Globals()
{
accept_port = 38080;
accept_count = 1;
accept_spawn = true;
buffer_size = default_large_iobuffer_size;
default_body_size = 6000;
get_env_int(&accept_port, "BRIOCORE_SERVER_ACCEPT_PORT");
get_env_int(&accept_count, "BRIOCORE_SERVER_ACCEPT_COUNT");
get_env_int(&accept_spawn, "BRIOCORE_SERVER_ACCEPT_SPAWN");
get_env_int(&buffer_size, "BRIOCORE_SERVER_BUFFER_SIZE");
get_env_int(&default_body_size, "BRIOCORE_SERVER_DEFAULT_BODY_SIZE");
}
}
G;
class StateMachine;
class AcceptContinuation;
////////////////////////////////////////////////////////////////////////
//
// StateMachine
//
// This continuation keeps track of the state of an HTTP
// request and response, and lives for life of the transaction.
//
////////////////////////////////////////////////////////////////////////
class StateMachine:public Continuation
{
private:
char scratch_space[512];
char url[512], *url_end, hdr[1024], *hdr_end;
int header_size, url_size, body_size, total_size;
int header_size_written, body_size_written;
int parse_mode;
public:
VIO * ivio, *ovio;
VConnection *nvc;
MIOBuffer *ibuf, *obuf;
IOBufferReader *reader;
int parse();
int fill();
int responseDataEvent(int event, void *data);
void startResponse();
void killStateMachine();
int computeBodySize(char *url);
int requestDataEvent(int event, void *data);
StateMachine(NetVConnection * vc):Continuation(new_ProxyMutex()),
header_size(0), url_size(0), body_size(0), total_size(0), header_size_written(0), body_size_written(0)
{
ink_atomic_increment((int *) &state_machine_count, 1);
scratch_space[0] = url[0] = hdr[0] = 0;
bzero(history, sizeof(history));
nvc = vc;
ivio = ovio = 0;
ibuf = new_MIOBuffer(G.buffer_size);
obuf = new_MIOBuffer(G.buffer_size);
reader = ibuf->alloc_reader();
parse_mode = 0;
history_pos = 0;
history_start_time = ink_get_based_hrtime();
SET_HANDLER(&StateMachine::requestDataEvent);
}
~StateMachine()
{
ink_atomic_increment((int *) &state_machine_count, -1);
ibuf->dealloc_all_readers();
free_MIOBuffer(ibuf);
free_MIOBuffer(obuf);
}
enum
{ HISTORY_SIZE = 128 };
struct HistoryItem
{
ink_hrtime time;
int line;
int event;
int ndone;
};
HistoryItem history[HISTORY_SIZE];
int history_pos;
ink_hrtime history_start_time;
};
#define REMEMBER(_e, _ndone) { \
history[history_pos%HISTORY_SIZE].time = ((ink_get_based_hrtime()-history_start_time) / HRTIME_MSECOND); \
history[history_pos%HISTORY_SIZE].line = __LINE__; \
history[history_pos%HISTORY_SIZE].event = _e; \
history[history_pos%HISTORY_SIZE].ndone = _ndone; \
history_pos++; }
////////////////////////////////////////////////////////////////////////
//
// StateMachine::requestDataEvent
//
// Called back whenever there is request data available.
// Incrementally parses out the request URL and headers,
// then switches to a response mode to generate the output.
//
////////////////////////////////////////////////////////////////////////
int
StateMachine::requestDataEvent(int event, void *data)
{
int done;
REMEMBER(event, (data) ? ((VIO *) data)->ndone : -1);
switch (event) {
case VC_EVENT_READ_READY:
case VC_EVENT_EOS:
if (ivio == 0) {
ivio = (VIO *) data;
}
done = parse();
if (done || (event == VC_EVENT_EOS))
startResponse();
break;
case VC_EVENT_ERROR:
killStateMachine();
break;
default:
printf("requestDataEvent got unexpected %s\n", event_int_to_string(event));
break;
}
return (0);
}
////////////////////////////////////////////////////////////////////////
//
// StateMachine::parse
//
// Called on a chunk of bytes representing a piece of a request
// headers, stripping out the URL, headers, etc. The state of
// the parse is kept in the variable <parse_mode> which represents
// the current parsing step.
//
////////////////////////////////////////////////////////////////////////
int
StateMachine::parse()
{
char *ptr;
int n, orig_n;
ptr = reader->start();
n = reader->block_read_avail();
orig_n = n;
while (n) {
// printf("PARSE MODE %d: [",parse_mode);
// fwrite(ptr,1,n,stdout);
// printf("]\n");
if (parse_mode == 0) // skipping over method
{
while (*ptr != ' ' && n) {
++ptr;
--n;
}
if (n == 0)
break;
parse_mode = 1;
} else if (parse_mode == 1) // looking for URL start
{
while (*ptr == ' ' && n) {
++ptr;
--n;
}
if (n == 0)
break;
parse_mode = 2;
url_end = url;
} else if (parse_mode == 2) // looking for URL end
{
while (*ptr != ' ' && n) {
*url_end++ = *ptr++;
--n;
}
if (n == 0)
break;
*url_end = '\0';
// printf("URL = '%s'\n",url);
parse_mode = 3;
} else if (parse_mode == 3) // looking for end of start line
{
while (*ptr != '\n' && n) {
++ptr;
--n;
}
if (n == 0)
break;
++ptr;
--n;
parse_mode = 4;
hdr_end = hdr;
} else if (parse_mode == 4) // read header until EOL
{
if (*ptr == '\r') {
++ptr;
--n;
parse_mode = 5;
break;
}
while (*ptr != '\n' && n) {
*hdr_end++ = *ptr++;
--n;
}
if (n == 0)
break;
++ptr;
--n;
if (*(hdr_end - 1) == '\r')
--hdr_end;
} else if (parse_mode == 5) // got empty line CR
{
++ptr;
--n; // consume LF
}
}
reader->consume(orig_n - n);
return (parse_mode == 5);
}
////////////////////////////////////////////////////////////////////////
//
// StateMachine::responseDataEvent
//
// Called back whenever there is an event and we are generating
// response data. The event can come from the read or write side.
//
////////////////////////////////////////////////////////////////////////
int
StateMachine::responseDataEvent(int event, void *data)
{
int n;
REMEMBER(event, (data) ? ((VIO *) data)->ndone : -1);
// printf("responseDataEvent got %s\n",event_int_to_string(event));
switch (event) {
case VC_EVENT_WRITE_READY:
fill();
break;
case VC_EVENT_WRITE_COMPLETE:
killStateMachine();
break;
case VC_EVENT_READ_READY:
case VC_EVENT_READ_COMPLETE:
n = reader->read_avail();
reader->consume(n);
break;
case VC_EVENT_ERROR:
killStateMachine();
break;
default:
printf("responseDataEvent got unexpected %s\n", event_int_to_string(event));
break;
}
return (0);
}
////////////////////////////////////////////////////////////////////////
//
// StateMachine::fill
//
// This is the synthetic server routine that writes a header,
// and a synthetically-generated body.
//
////////////////////////////////////////////////////////////////////////
int
StateMachine::fill()
{
char *ptr;
int n;
int hdr_bytes_left, body_bytes_left, copy_size;
// TODO: I don't know if this call to obuf->write_avail() is necessary...
n = obuf->write_avail(); // used to grow blocks
n = obuf->block_write_avail();
ptr = obuf->end();
hdr_bytes_left = header_size - header_size_written;
body_bytes_left = body_size - body_size_written;
// write header
if (hdr_bytes_left) {
copy_size = min(n, hdr_bytes_left);
bcopy(scratch_space + header_size_written, ptr, copy_size);
ptr += copy_size;
header_size_written += copy_size;
hdr_bytes_left -= copy_size;
n -= copy_size;
obuf->fill(copy_size);
}
// write body
if ((hdr_bytes_left == 0) && body_bytes_left) {
copy_size = min(n, body_bytes_left);
memset(ptr, 'B', copy_size);
ptr += copy_size;
body_size_written += copy_size;
body_bytes_left -= copy_size;
n -= copy_size;
obuf->fill(copy_size);
}
return ((hdr_bytes_left == 0) && (body_bytes_left == 0));
}
////////////////////////////////////////////////////////////////////////
//
// StateMachine::startResponse
//
// Called when the request is parsed, to set up the state
// machine to generate response data.
//
////////////////////////////////////////////////////////////////////////
void
StateMachine::startResponse()
{
ivio->done(); // ignore future input data
SET_HANDLER(&StateMachine::responseDataEvent);
url_size = strlen(url);
body_size = computeBodySize(url);
snprintf(scratch_space, sizeof(scratch_space), "HTTP/1.0 200 OK\r\nContent-length: %d\r\n\r\n", body_size);
header_size = strlen(scratch_space);
total_size = header_size + body_size;
header_size_written = 0;
body_size_written = 0;
fill();
ovio = nvc->do_io(VIO::WRITE, this, total_size, obuf);
}
////////////////////////////////////////////////////////////////////////
//
// StateMachine::killStateMachine
//
// Called when the response is generated, to clean up and
// destroy the state machine.
//
////////////////////////////////////////////////////////////////////////
void
StateMachine::killStateMachine()
{
nvc->do_io(VIO::CLOSE); // do I need to cancel vios first?
// printf("*** State Machine Dying **\n");
delete this;
}
////////////////////////////////////////////////////////////////////////
//
// StateMachine::computeBodySize
//
// Chooses a body size to send based on the URL.
//
////////////////////////////////////////////////////////////////////////
int
StateMachine::computeBodySize(char *url_str)
{
int l;
char *p;
for (p = url_str + strlen(url_str); (*p != '/' && p > url_str); p--);
#ifdef SENDER_IS_JTEST
// coverity[secure_coding]
if ((*p == '/') && (sscanf(p, "/%d", &l) == 1)) {
return (l);
} else
printf("Unable to get doc body size [%s]\n", url_str);
#else
// coverity[secure_coding]
if ((*p == '/') && (sscanf(p, "/length%d.html", &l) == 1))
return (l);
else
return (G.default_body_size);
#endif
}
////////////////////////////////////////////////////////////////////////
//
// AcceptContinuation
//
// This is the continuation that is notified of connection
// accepts. It spawns a state machine to handle the transaction.
// New transactions can be accepted and spawned while other
// transactions are still in progress.
//
////////////////////////////////////////////////////////////////////////
class AcceptContinuation:public Continuation
{
public:
int startEvent(int event, NetVConnection * nvc)
{
if (event == NET_EVENT_ACCEPT) {
// printf("*** Got Request, %d Transactions Currently Open ***\n",
// state_machine_count);
StateMachine *sm = new StateMachine(nvc);
sm->ivio = nvc->do_io(VIO::READ, sm, INT64_MAX, sm->ibuf);
} else
{
printf("AcceptContinuation error %d\n", event);
}
return (0);
}
AcceptContinuation():Continuation(NULL)
// Allow multi-thread callers
{
SET_HANDLER(&AcceptContinuation::startEvent);
}
};
////////////////////////////////////////////////////////////////////////
//
// Main Entry Point
//
// This is the main entry point to start the accepting server.
//
////////////////////////////////////////////////////////////////////////
int
run_TestHook()
{
int i;
Continuation *c;
printf("*** BRIOCORE Server Running ***\n");
for (i = 1; i <= G.accept_count; i++) {
c = new AcceptContinuation();
(void) netProcessor.accept(c, G.accept_port, G.accept_spawn);
}
return (0);
}